1239756 玖、發明說明 ilii明應敘明：發明所屬之技術領域、先前技術、內容、實施方式及圖式簡單說明) 一、發明所屬之技術領域 此發明係有關數據機與電話線間的無線通信系 統0 二、先前技術 撥接數據機之電腦經常係以有線連結連上網際 網路之網路系統。以有線連結上網為例，係以_個一 芯之電話線連結上個人電腦（pc)之數據機埠及牆上 之電話插座。於插座内，此二芯電話線連上一來自電 話公司之中央局（稱為，，區域迴路”）的雙絞電話、線。 有線連結在使用上有許多的限制，例如，需要有 線連結的電腦，其攜性將受限制’因為其在操作_ f 仰賴附近是否有電話線插座。因此，無線連結的發 展，可降低人們對有線連結的需求。 有部份已上市的產品係使用電子電機工程協合 (IEEE ) 8〇2·1 lb之標準。例如，廣受使用者喜愛之 蘋果電腦的Airport，其包括一個基地台以及至少一無 線電路卡，以固定於可攜式電腦中。該IEEE標準之資 料傳輸量可達1 1百萬位元/每秒，並能處理乙太區域 網路中，同時上網之許多使用者。而其使用工作於 2400百萬赫兹的 ISM ( Industrial、Scintific、Medical ，工業、科學、醫學）射頻頻帶，並使用跳頻展頻（ Freqeuncy Hopping Spread Spectrum，FHSS)或直接1239756 玖, the description of the invention should be clearly stated: the technical field to which the invention belongs, the prior art, the content, the embodiments, and the drawings are briefly explained) 1. The technical field to which the invention belongs This invention relates to wireless communication between modems and telephone lines System 0 2. The computers connected to modems in the prior art are often connected to the Internet using a wired connection. Take wired connection for Internet access as an example. It uses a single-core telephone line to connect to the port of personal computer (PC) and the telephone socket on the wall. In the socket, this two-core telephone line is connected to a twisted pair telephone or line from the central office of the telephone company (referred to as "regional loopback"). There are many restrictions on the use of the wired connection. Computers, their portability will be limited 'because their operation_ f depends on whether there is a telephone line socket nearby. Therefore, the development of wireless links can reduce people's demand for wired links. Some of the products on the market use electronic motors Engineering Association (IEEE) 802.1 · lb standard. For example, the popular Apple Computer Airport includes a base station and at least one wireless circuit card to be fixed in a portable computer. The The data transmission rate of the IEEE standard can reach 11 million bits per second, and it can handle many users on the Ethernet network at the same time accessing the Internet. It is used in the ISM (Industrial, Scintific , Medical, Industrial, Scientific, Medical) radio frequency bands, and use Freqeuncy Hopping Spread Spectrum (FHSS) or direct
序列展頻（Direct Sequnce Spread Spectrum，DSSS 1239756 由於此系統具有相當高之資料傳輸量，可用以傳 輪纜線或數位用戶專線（DSL )數據機之信號，並作 · 為網路電腦。A i rp 〇 r t基地台亦具有撥接（d i a 1 - u p )數 據機，可連結至電路接頭（j a c k )。把具有5 6千位元 /每秒（Kbit/S )之資料流以及額外之控制信號，轉換 成8 0 2 · 1 1 b之格式，並透過無線傳送方式以傳送到一 個膝上型輕便電腦（laptop computer)。以上是一種 較昂貴之作法。 其他無線數據機之型態，藉由短距離射頻路徑， 從電話端接頭至可攜式電腦，以傳送撥接數據機信號籲 。這些數據機藉由類比/數位轉換器以將輸入之V. 3 4 或V · 9 0信號數位化，並在射頻通道使用四象限振幅調 變（Quadrature Phase Shitf Keying，QPSK)或 FSK 來傳送數位資料串流。由於V · 9 0信號必需非常準確地 傳送’所以傳輸端需要高位元（例如，i 〇_丨2位元） 之類比/數位轉換器且接收端需要高位元之數位/類 比轉換器。 上述組態導致以射頻通道來實現高位元傳輸率 _ ，需使用大約200千赫玆（KHz )之射頻頻寬。上述 頻寬遠大於類比頻率調變（FM )無線電話之30赫玆 以及部份數位無線電話所需之i 0 〇赫玆。過高之頻寬 要求將使具有上述組態之數據機缺乏吸引力。 網際網路使用者到電話公司之中央辦公室網路 服務提供者（lnternet Service Provider，ISP)的設 備的距離會變動，可能由數百呎至數哩之遠。這導致 電話介面很難去精準地匹配，有時候會導致系統中產 7 1239756 生實體回聲。大部份，，有線，，數據機因而配置有數據 機甸聲消除器，以消除Λ部份之回聲。 ， 在無線系統中，有時候回聲強過數據信號且使射 頻通道飽合。飽合或過度驅動之電路將導致數據信號 非線性失真而使數據機部聲消除器失效。 在此之前，回聲消除器係包括在無線數據機之基 座，在射頻通道飽合之前而消除回聲。由於大部份之 回聲消除器為數位式，而這解決之道需將信號轉至數 位，然後再轉回類比。_比/數位、數位/類比轉換會 明_地使資料通道產生額外之複雜度。除非使用非常鲁 同仇元轉換，V90將降速至V.32或V.34的速度。 上述之距離變化 < 導致撥接數據機之信號準位 之變化達3〇dB。由於數據機可以處理上述之變動，所 以在有線模式運作下，這不是個問題。然而，在無線 系統中，信號準位之變動將是個問題。在FSK射頻通 道之輸入端，如果信號減少30dB，這使得FM調頻將 因此而減小。此3 0 dB不但降低信號·雜訊比並使得系 統無法操作。解決之道乃在導入一個自動增益控制器 (Automatic Gain Control，AGC)或自動準位控制器 鲁 (Automatic Level Control，ALC)單元以確保輸入 準位。然而，新穎的數據機在開始通信時，送出不同 準位之音頻（tone)以執行交握（handshake)程序， 以修正信號準位至距離變數之數量。一個AGc/ 電路將取消上述交握處理程序並導致系統不穩定。 三、發明内容 8 1239756 一般來說，依據本發明之一特色’本發明係為撥 接數據機透過無線通訊連結以傳送數據信號之電路 系統。數據信號如V. 34訊號具有複雜之多階垂直振幅 調變（Quadrature Amplitude Modulation ’ QAM)之 調變符號集（constellation)並且類似4KHz之電話頻 道所傳送之類比基頻信號。另一個例子就是V · 9 0的信 號。V.90訊號有些特別，其包括128層振幅準位之脈 波振幅調變（Pulse Amplitude Modulation，PAM)信 號，且其依據數位公眾交換電話網路 （Public Switched Telephone Network j PSTN)之電話網路的 籲 音頻（U-Law)擴展器而間隔（space)不同。為了能 精準地傳輸這些信號，我們需要低雜訊以及高振幅線 性之特徵化頻道。在射頻頻道中傳送這些信號之有效 方法’係直接將射頻載波與V · 3 4或V. 9 0訊號進行F Μ 調頻。就V · 9 〇而言，就是需要傳送具有1 2 8個不同間 隔的離散準位之波頻調變（FreqUenCy Shift Keying ，FSK )信號。傳送此信號所需之適當射頻頻寬為 3 0 Κ Η z，與傳統無線電話所使用之類比F %頻道相同。_ 當然’如果把調頻頻寬加大，則信號-雜音比將更加 改善 此電路系統包含了 一個新穎的自動增益控制電 路，其接收了數據信號’又將此數據信號實質上維持 在/固定之峯值振幅，且在一預設之線性放大率範圍 内。jPC*弘吩尔 送器’其從自Direct Sequnce Spread Spectrum (DSSS 1239756) Due to the relatively high data transmission capacity of this system, it can be used to transmit signals from wheel cables or digital subscriber line (DSL) modems and serve as a network computer. A i The rp 〇rt base station also has a dial-up (dia 1-up) modem, which can be connected to a circuit jack (jack). It has a data flow of 5 6 kilobits per second (Kbit / S) and additional control signals , Converted to the format of 80 2 · 1 1 b, and transmitted to a laptop computer through wireless transmission. The above is a more expensive method. The type of other wireless modems, by Short-distance RF path from the telephone connector to the portable computer to transmit dial-up modem signals. These modems use an analog / digital converter to digitize the input V. 3 4 or V · 90 signal And use four-quadrant phase modulation (QPSK) or FSK to transmit digital data streams in the RF channel. Since V.90 signals must be transmitted very accurately, the transmission end needs to be high (For example, i 〇_ 丨 2 bit) analog / digital converter and the receiving end needs a high-bit digital / analog converter. The above configuration results in a high-frequency transmission rate in the RF channel, which requires about 200. Kilo-Hertz (KHz) radio frequency bandwidth. The above-mentioned bandwidth is much larger than the 30 Hertz of analog frequency modulation (FM) radiotelephones and i 0 0 Hertz required by some digital radiotelephones. Excessive bandwidth requirements will have The modems configured above are not attractive. The distance between Internet users and the equipment of the Internet Service Provider (ISP) of the central office of the telephone company varies, which may range from hundreds of feet to miles This makes it difficult to accurately match the phone interface, and sometimes it can cause 7 1239756 physical echoes in the system. Most, wired, and modems are therefore equipped with modem noise cancellers to eliminate Λ part of the Echo. In wireless systems, sometimes the echo is stronger than the data signal and saturates the RF channel. A circuit that is saturated or overdriven will cause non-linear distortion of the data signal and make the data The machine's sound canceller is ineffective. Prior to this, the echo canceller was included in the base of the wireless modem and eliminated the echo before the RF channel was full. Since most of the echo cancellers are digital, this solution The channel needs to turn the signal to digital, and then back to analog. _Ratio / digital, digital / analog conversion will clearly add additional complexity to the data channel. Unless you use very similar conversions, V90 will slow down V.32 or V.34 speed. The above-mentioned change in distance < results in a change in the signal level of the dial-up modem by 30 dB. Since modems can handle these changes, this is not a problem in wired mode. However, in wireless systems, changes in signal level will be a problem. At the input of the FSK RF channel, if the signal is reduced by 30dB, this will cause FM frequency modulation to be reduced accordingly. This 30 dB not only reduces the signal-to-noise ratio but also makes the system inoperable. The solution is to import an Automatic Gain Control (AGC) or Automatic Level Control (ALC) unit to ensure the input level. However, when a new modem starts to communicate, it sends out tones of different levels to perform a handshake procedure to correct the number of signal levels to the distance variable. An AGc / circuit will cancel the above handshake process and cause system instability. III. SUMMARY OF THE INVENTION 8 1239756 In general, according to one of the features of the present invention, the present invention is a circuit system for dialing a data machine through a wireless communication link to transmit data signals. Data signals such as V. 34 signals have complex multi-level vertical amplitude modulation (QAM) modulation symbol sets (constellation) and are analogous to the analog baseband signals transmitted by a 4KHz telephone channel. Another example is a V · 90 signal. The V.90 signal is a bit special. It includes a 128-layer Pulse Amplitude Modulation (PAM) signal, and it is based on the telephone network of the Public Switched Telephone Network j PSTN. The U-Law expander has different space. To accurately transmit these signals, we need low-noise and high-amplitude linear characterization channels. An effective method of transmitting these signals in a radio frequency channel ’is to directly FM the radio frequency carrier with a V · 34 or V.90 signal. As far as V · 90 is concerned, it is necessary to transmit a FreqUenCy Shift Keying (FSK) signal with discrete levels of 128 different intervals. The proper RF bandwidth required to transmit this signal is 30 Η z, which is the same as the analog F% channel used by traditional wireless telephones. _ Of course 'If the FM bandwidth is increased, the signal-to-noise ratio will be improved. This circuit system includes a novel automatic gain control circuit that receives a data signal' and essentially maintains / fixes this data signal. The peak amplitude is within a preset linear magnification range. jPC * 弘 芬尔 Sender ’Its from
9 1239756 出一射頻（RF)載波。此一特色亦可能包含一或多種之 下列特性。 此電路系統包含了一複合電路，其將電話線中的 輸入信號從輸出信號中隔離出來。此複合電路之輸出 信號電壓可能超過發送器之線性放大率範圍。我們用 自動增益控制電路（AGC )限制信號電壓，因而可於 發送器中，降低或限制了非線性失真。AGC亦防止無 線電頻道中，信號的準位顯得太低。低信號準位乃由 於消費者與電話辦公室之間的長距離（亦稱長迴 路）。此電路系統亦可包含一雙工器，在發送和接收 鲁 到之射頻信號之間，保持分離之狀態。 發送器可為一個射頻（RF)發送器，其中包含一調 頻（FM)器，以數據信號之頻率調制出射頻載波。而自 動增益控制電路在信號輸入調頻器之前，調整信號之 信號電壓。 近端單元（即基座）之電路系統可包含微處理 器，其控制信號被傳送至遠端無線單元。該遠端無線 單元以無線通訊連結與近端單元彼此通訊。 _ 本發明之另一特色，在於提供類比信號無線通訊 連結。此裝置包含一有線連結至電話線之近端單元。 該近端單元透過有線連結，用電話線傳送數據。該裝 置亦包括了有線連接至數據機之遠端無線單元 (Remote unit)，該遠端無線單元透過有線與數據機連 結，以在兩者間傳送數據。遠端無線單元及近端單元 之間，乃是經由無線連結而彼此通訊。近端單元包括 一射頻接發送器以發送無線數據信號至遠端無線單 10 1239756 元、以及一自動增益控制電路，將數據信號實質上維 持在一固定之峯值振幅，並且維持在射頻接發送器之 預設線性放大率範圍内。此一特色亦可能包含一或多 種之下列特性。 近端單元包括射頻接收器及複合電路，該射頻接 收器可接收遠端無線單元傳送來的資料，並將其傳送 至電話中央局（輸出信號或上傳訊號）；該複合電路可 將電話線中的輸入信號或下載資料流之訊號從輸出 信號中分開。因為有不平衡之阻抗，以致輸入之類比 信號由此複合電路通過時，可能包含大量之輸出信 · 號。此時自動增益控制電路將維持此合成信號在一固 定之峯值電壓，這準位足以使非線性失真降低並且在 無線電頻道中，使訊號-雜音比能夠足夠高。 遠端無線單元也可包含一複合電路，其將電話線 中的輸入信號從輸出信號中分離出來。而自動增益控 制電路可調整上傳之訊號準位，以得到較好的非線產 雜訊之準位，使無線電中具有較高之訊號-雜音比。 前述的裝置也可用來操作像是無線電話機。在這 _ 種狀況下，近端單元可以是一無線電話近端單元，而 遠端無線單元可以是一個無線電話機之話筒（近端單 元）。以及遠端無線單元可包含一揚聲器、一麥克風， 及一撥號盤。依此方式之本發明係為一雙重功能無線 電話，用以正常之聲音通信或數據訊號傳輸可以上 網0 本發明之再一特色為提供一種於無線通訊連結 上傳送資料之裝置。該裝置包含了 ··產生一類比信號 11 1239756 之裝置；透過無線通訊連結時，降低數據信號非線性 失真之裝置。 本發明之其它之特性及優點，將由以下的描述， 包括主張之專利範圍及圖示等表顯出來。 四、實施方式 本發明係為撥接數據機透過無線通訊連結以傳 送類比信號之電路系統。該數據信號（例如，V 3 2 或V. 34信號）具有複雜之多階垂直振幅調變 (Quadrature Amplitude Modulation，QAM )之調變 符號集（constellation)並且以4KHz之電話通道所傳 送之類比基頻信號。數據信號之另一例子為V · 9 〇所傳 送之h號。V · 9 0 #號有些特別，其包括1 2 8層振幅準 位之脈波振幅調變（Pulse Amplitude Modulation， PAM )仏號，且其依據公眾交換電話網路（puwie9 1239756 a radio frequency (RF) carrier. This feature may also include one or more of the following features. This circuit system contains a composite circuit that isolates the input signal from the output signal in the telephone line. The output signal voltage of this composite circuit may exceed the linear amplification range of the transmitter. We use an automatic gain control circuit (AGC) to limit the signal voltage, which can reduce or limit non-linear distortion in the transmitter. The AGC also prevents the signal level from appearing too low in the radio channel. The low signal level is due to the long distance (also known as the long circuit) between the consumer and the telephone office. This circuit system can also include a duplexer, which keeps the separated state between the transmitted and received radio frequency signals. The transmitter may be a radio frequency (RF) transmitter, which includes a frequency modulator (FM), which modulates a radio frequency carrier with the frequency of the data signal. The automatic gain control circuit adjusts the signal voltage of the signal before the signal is input to the frequency modulator. The circuitry of the near-end unit (i.e., the base) may include a microprocessor whose control signals are transmitted to the far-end wireless unit. The remote wireless unit communicates with the near-end unit via a wireless communication link. _ Another feature of the present invention is to provide an analog signal wireless communication link. The device includes a near-end unit wired to a telephone line. The near-end unit transmits data over a telephone line via a wired connection. The device also includes a remote unit (wireless) connected to the modem. The remote unit is connected to the modem via wire to transmit data between the two. The remote wireless unit and the near-end unit communicate with each other via a wireless link. The near-end unit includes a radio frequency transmitter to send wireless data signals to the remote radio unit 10 1239756 yuan, and an automatic gain control circuit to substantially maintain the data signal at a fixed peak amplitude and maintain the radio frequency transmitter Within the preset linear magnification range. This feature may also include one or more of the following features. The near-end unit includes a radio frequency receiver and a composite circuit. The radio frequency receiver can receive the data transmitted by the far-end wireless unit and transmit it to the central office of the telephone (output signal or upload signal). The input signal or download stream signal is separated from the output signal. Because of the unbalanced impedance, when the analog input signal passes through the composite circuit, it may contain a large number of output signals. At this time, the automatic gain control circuit will maintain the synthesized signal at a fixed peak voltage. This level is sufficient to reduce the non-linear distortion and in the radio channel, the signal-to-noise ratio can be sufficiently high. The remote wireless unit may also include a composite circuit that separates the input signal from the output signal in the telephone line. The automatic gain control circuit can adjust the uploaded signal level to obtain a better level of non-linear noise, so that the radio has a higher signal-to-noise ratio. The aforementioned devices can also be used to operate like radiotelephones. In this case, the near-end unit can be a radiotelephone near-end unit, and the far-end radio unit can be a radiotelephone microphone (near-end unit). And the remote wireless unit may include a speaker, a microphone, and a dial. The invention in this manner is a dual-function wireless telephone, which can be connected to the Internet for normal voice communication or data signal transmission. Another feature of the invention is to provide a device for transmitting data over a wireless communication link. This device includes a device that generates an analog signal 11 1239756; a device that reduces the non-linear distortion of the data signal when connected via wireless communication. Other features and advantages of the present invention will be apparent from the following description, including the claimed patent scope and illustrations. 4. Embodiment The present invention is a circuit system for dialing a modem to transmit analog signals through a wireless communication link. The data signal (for example, V 3 2 or V. 34 signal) has a complex multi-order vertical amplitude modulation (QAM) modulation symbol set (constellation) and is transmitted by a 4KHz telephone channel analog base Frequency signal. Another example of a data signal is the h number transmitted by V · 90. V · 9 0 # is a bit special, it includes the Pulse Amplitude Modulation (PAM) 仏 number of 1 2 8 levels, and it is based on the public switched telephone network (puwie
Switched Telephone Network，PSTN)之電話網路的 音頻（U-Law)擴展器而間隔（space)不同。 為了能精準地傳輸撥接數據機之信號需要低雜 吼以及南振幅線性之特徵化通道。依據本發明，在射 頻通道中傳运這些信號之有效方法，係直接將射頻載 波與V · 3 4或V · 9Ό h號進行調頻。就v . 9 〇信號而言，合 計需傳送具有128個不同間隔的波頻調變（Frequency Shift Keying，FSK)信號。傳送此信號所需之適當射 頻頻寬為30KHz，與傳統無線電話所使用之類比調頻 通道之頻寬類似。 12 1239756 本發明所描述者係為於撥接數據機及雙絞電話 線間建立一短距離之無線通訊連結之系統。在不影響 -效能情況下，此電路系統降低了二芯電話線對撥接網 際網路之連結需求。數據機之電路可根據最新之撥接 連線標準而操作，例如V· 90或V· 92，其提供了每秒達 56k位元（kb/s)的數據傳輸速度。 依據標準無線電話之運作，在此所述之電路系統 係使用類比頻率調變（FM/FSK )之架構，而不是數 位架構，在傳統音頻通道中傳送V· 90或V· 92數據信 號。在該音頻通道所傳送之數據係對照至聲頻資料。_ 此一電路系統因此避免了使用可能降低V· 9〇或ν·92 數據機效能之類比/數位及數位/類比等轉換動作，同 時避免數位RF調變所需要之較高頻寬。標準的數位無 線電話通道亦可用以傳送撥接數據信號。但速度將因 類比/數位的轉換而減少。 上述電路系統中使用一個新穎以及低成本之自 動增益控制器（AGC )電路，以消除因電話線之回聲 所導致之射頻電路之非線性失真。同時Agc電路可維 持數據k號之準位以達到射頻通道所需之信號-雜音 比。 本發明所描述由電路系統所建立之無線連結，乃 藉由使用下列二個元件以建立起來··基座（base unit) 及遠端無線單元（remote unit)。這些元件有如下所述 之設置方式。 一個二芯之電話線連結電腦之數據機至遠端無 線單元，此一由電池（或經由電腦的USB或PC卡的電 13 1239756 線來提供電力）操作之遠端無線單元可置於一附有 天線之小盒内。而此二芯電話線可同時載送輸入及輸 出二方向傳送之數據信號，包括從一台數據機上傳、 及至一台數據機之下載，以進行全雙工操作。數據機 數據信號可為V. 90型態，其由128準位基頻信號所組 成，具有4kHz之頻譜寬度，可被傳送在傳統之聲頻通 道中。 遠端無線單元包含射頻發送器及接收器，其可在 900MHz或2.4GHz的無線電話之射頻頻帶中操作，以 來回載送數據機信號。在無線通道上的傳輸是”四芯”籲 的，與二芯之電話線傳輸是不同的。 無線傳輸可藉由頻率調變（FM)啟動執行。FM通 道能夠滿足對V. 90型態傳輸信號之迫切的線性需求。 遠端無線單元藉由無線連結，而與接上牆上的插 座之基座進行通信。遠端無線單元通信時係使用些微 不同之載波頻率以進行雙向傳輸。基座包括成雙之射 頻發送器及接收器，此外電路系統在牆上插座與該電 話線之間，需要傳送及接收雙音頻V.90信號（雙工）。φ 基座包含限制傳送至數據機之信號非線性失真 之電路系統。此一電路系統利用AGC電路以限制高峯 振幅，其可在FM射頻通道上被傳送出去，並且使失 真保持在V · 9 0系統之規格嚴謹之要求範圍内。藉由在 基座内之自動增益控制電路，無線連結大致上可成為 線性的，因此，對於傳送之V. 9 0信號而言，此無線連 結是察覺不出來的。這表示此一於電話線上消除回聲 14 1239756 的功能可以用無線連結之另一端（且建於電腦數據機 内）的標準回聲消除器所執行。 建立無線連結之電路系統，除了對於基座之 以及額外電路系統，以及遠端無線單元之下述元件以 外’用現有使用F Μ技術之類比無線電話所發展之晶 片組。此電路系統提供與電腦數據機之完美連結，而 不需對數據機内之軟硬體作任何的修改（例如：通訊 協定等）。 运纟而無線早元可為電池彳呆作並放置於基座中充 電。依據標準無線電話操作以重置保全碼（security code)。亦可藉由電腦之USB纜線以提供操作電。在 本列中’可使用固定之保全碼並儲存於遠端無線單元 之電子式可清除程式化唯讀記憶體（EEPROM56)中。 在900MHz的頻率中有60個通道，射頻通道選台 可以是自動的或經由遠端無線單元之按鈕選台。Switched Telephone Network (PSTN) telephone network U-Law expanders have different spaces. In order to accurately transmit the signal of the dial-up modem, a low-noise and a characteristic channel with a linear south amplitude are required. According to the present invention, an effective method for transmitting these signals in the radio frequency channel is to directly tune the RF carrier with V · 34 or V · 9Ό h. As for the v.90 signal, it is necessary to transmit a total of 128 Frequency Shift Keying (FSK) signals with different intervals. The proper radio frequency bandwidth required to transmit this signal is 30KHz, which is similar to the bandwidth of the analog FM channel used by traditional radiotelephones. 12 1239756 The present invention describes a system for establishing a short-distance wireless communication link between a dial-up modem and a twisted-pair telephone line. Without affecting the performance, this circuit system reduces the connection requirements of the two-core telephone line to the dial-up Internet. The modem circuit can operate according to the latest dial-up connection standards, such as V · 90 or V · 92, which provides data transmission speeds up to 56k bits per second (kb / s). According to the operation of standard radiotelephones, the circuit system described here uses an analog frequency modulation (FM / FSK) architecture, rather than a digital architecture, to transmit V · 90 or V · 92 data signals in traditional audio channels. The data transmitted on the audio channel is compared to the audio data. _ This circuit system therefore avoids the use of analog / digital and digital / analog conversion actions that may reduce the performance of V · 90 or ν · 92 modems, while avoiding the higher bandwidth required for digital RF modulation. Standard digital wireless telephone channels can also be used to transmit dial-in data signals. But speed will be reduced by analog / digital conversion. In the above circuit system, a novel and low-cost automatic gain controller (AGC) circuit is used to eliminate the non-linear distortion of the RF circuit caused by the echo of the telephone line. At the same time, the Agc circuit can maintain the data k-level to achieve the signal-to-noise ratio required by the RF channel. The wireless connection established by the circuit system described in the present invention is established by using the following two components: a base unit and a remote unit. These components are arranged as described below. A two-core telephone line connects the computer's modem to the remote wireless unit. This remote wireless unit operated by a battery (or powered by a computer's USB or PC card's 13 1239756 line) can be placed in an attached Inside a small box with an antenna. The two-core telephone line can simultaneously carry data signals transmitted in both directions, including uploading from a modem and downloading to a modem for full-duplex operation. Modem The data signal can be of V. 90 type, which is composed of a 128-level fundamental frequency signal with a 4kHz spectrum width and can be transmitted in traditional audio channels. The remote wireless unit includes a radio frequency transmitter and receiver, which can operate in the radio frequency band of a 900 MHz or 2.4 GHz radio telephone to carry the modem signals back and forth. The transmission on the wireless channel is "four-core", which is different from the two-core telephone line transmission. Wireless transmission can be initiated by frequency modulation (FM). The FM channel can meet the urgent linear demand for V. 90 type transmission signals. The remote wireless unit communicates wirelessly with the base of the wall socket. The remote wireless unit communicates using slightly different carrier frequencies for bidirectional transmission. The base includes dual radio frequency transmitters and receivers. In addition, the circuit system is between the wall socket and the telephone line. It needs to transmit and receive dual audio V.90 signals (duplex). The φ base contains circuitry that limits the nonlinear distortion of the signal transmitted to the modem. This circuit system uses the AGC circuit to limit the peak amplitude, which can be transmitted on the FM radio frequency channel, and keeps the distortion within the rigorous requirements of the V · 90 system. With the automatic gain control circuit in the base, the wireless connection can be made substantially linear, so this wireless connection is imperceptible for the transmitted V. 90 signal. This means that the function of echo cancellation on the telephone line 14 1239756 can be performed with a standard echo canceller at the other end of the wireless link (and built into the computer modem). The circuit system for establishing a wireless connection, in addition to the base and additional circuit systems, and the following components of a remote wireless unit, is a chip set developed using an existing analog wireless telephone using F M technology. This circuit system provides a perfect connection with the computer modem, without any modification to the hardware and software in the modem (such as: communication protocols, etc.). Run and wireless early can work for the battery and charge in the base. Operate according to a standard radiotelephone to reset the security code. The computer's USB cable can also be used to provide operating power. In this column ', a fixed security code can be used and stored in the electronic erasable programmable read-only memory (EEPROM56) of the remote wireless unit. There are 60 channels in the 900MHz frequency. The RF channel selection can be automatic or through the button of the remote wireless unit.
圖1顯示一無線通訊系統1 0。此無線通訊系統1 〇 包含基座11、及遠端無線單元12。此二單元之零組件 是與標準9 〇 〇 Μ Η z無線電話電路相同或相似之零組 件0 遠端無線單元1 2和電腦1 3有介面連結’使得電腦 1 3藉由内建之數據機1 4 <在二芯電話線1 8傳送/接收 數據並建立射頻（RF)連結17。電腦13可以是任何型態 之裝置，例如膝上型、桌上裂電腦、或PDA，其内建 有符合ITU V.90規格 運作速度最高至56kbps之撥接 數據機1 4。需注意的是 其他型態之數據機，例如上 15 1239756 述中所提及之運作速度較慢的V · 3 4型態，亦可使用於 上述之通訊方法中。 - Μ連結介面 基座1 1，藉由一插入牆上電話插座丨6之二芯電話 線1 5 ’連結至電話公司中央局和公用電話網路（ρ $ 丁ν ) ’牆上電話插座1 6為典型之RJ 1 1接頭。 基座11及逆端無線單元12乃透過射頻（rf)連結 17而互相通訊。射頻（RF)連結17傳送標準之聲頻通 道，包含了 4kHz之4仟赫（kHz)基頻頻譜頻率，而這也 _ 是被聲頻信號（例如，V· 90數據機信號）所佔有之頻譜 範圍。 因此，數據信號可透過無線通訊系統從射頻基座 1 1傳送至遠端無線單元1 2 (反之亦然）。此射頻連結之 距離範圍可能不同，但基本上為幾百呎或更長。在信 號解調之後，此數據信號透過二芯電話線丨8插上二端 均有之R J 1 1電洁線插座，而往來傳送於遠端無線單元 1 2及電腦1 3之間。 參 基座（也稱近端單元） 圖2為基座11之方塊圖。在基座丨丨中，最接近電 話中央局之兩組電路為：電話線介面2〇、以及複人 (Hybrid)電路21。電話線介面20亦稱為資料存取裂置 (D A A) ’其藉由電話線路丨5、牆上插座1 6以及雙絞電 話線而連結上電話中央局之設備（圖未示）。又^ 16 1239756 電話介面20包含鈴聲探測器、 switch) 、DC(直流電）迴路維持電路、、/八 〇〇k 器(圖未示）。上述電話介面2〇 刀離之變堡 . 电格系統，可參者暴 國專利申請號09/658,049，名稱Λ 、 / . 1 為…線數據機 (wireless modem)，在此不多作說明 複…21包含-具電…複合及操作放大 15 (圖未不），複合電路21將二怒之電話操作轉換為 =之電話操作。複合電路2 i之最特別的功能為：可 在此二芯電話線上’同時間將在兩個彼此相反方向流 動之信號m (所！胃”全雙卫操作”），且使其成為在 二不同之訊號線（四思）22及23上，均可獲得信號：輸 入（從電話中央局）之信號出現在訊號線22, 由訊號線23輸出。 ^ ^ 複合電路21為一橋接電路；因此，訊號線^及^ 之二信號僅僅在所有連結至此橋接電路之阻抗都匹 配得宜才能分離。然而，必需考量的是阻抗不匹配是 可能存在的，因其可使訊號線23之信號成為從電話= 司中央局部份反應回來之信號，而出現在訊號線^ 上，此一 ’’回聲”將被加入此輸入信號，使得產生信號 2 4之振幅成為期望得到信號振幅之數倍高。 回聲產生之信號2 4可使得射頻發送器2 5發生超 載及非線性失真情形。嵌入在信號24中之回聲在經過 非線性失真的破壞後，將無法有效地被電腦丨3數據機 1 4中之回聲消除器所消除。因此，為了降低超載及非 線性失真，本發明設置了 AGC電路26。它位於基座i i 之複合電路21與射頻發送器25之間。AGC電路26包括 17 1239756 峯值振幅偵測器，其提供一足夠長之時間常數，以使 得輸出信號27實質上可保持在一常數之菜值振幅，且 _ 在射頻發送器2 5之線性放大範圍内。因為a G C電路2 6 降低了非線性失真’故對數據機的信號而言，射頻連 結17基本上變為不易察覺的。因此，在數據機μ内之 回聲消除器將可消除、且在某些情況中是可全部消除 出現在複合訊號線2 2上之回聲。 A G C電路2 6也可保持輸出信號2 7之調頻振幅以 防降低至非常低之值，以滿足非常長距離至電話公司 中央局之迴圈。低調頻振幅將導致射頻信號的低信號 _ -雜訊比。 當A G C電路2 6應用於許多中頻（IF )中時，非線 性失真並非是個問題。但AGC電路26運作於基頻時， 其線性要求十分嚴格。解決之道可以是使用特定線性 連結裝置，以控制電壓來改變增益，或使用電阻性步 進衰減器 （resistive step attenuaror)，其可由數位 命令來控制。 增益之控制可為直接或藉由回饋之方式，直接控 g 制係包括量測輸入電壓2 4，並藉由調整電壓增益以達 到常數輸出信號2 7。換句話說，回饋控制係包括量測 輸出信號2 7並藉由調整增益或衰減而使其保持常數 值。 AGC電路26運用之目的乃在於獲得一個固定之 增益（或衰減）設定’在一般運作時能使信號通道最 佳化。然而，使用V· 34以及V· 90資料系統須經起始程 序（例如，交握程序）時，使得該處理過程變成相當 18 1239756 複雜。在雙向傳輸時，起始程序包括持續數秒之數個 步驟。其中由於傳輸信號之振幅會變動，在兩個傳輸 方向來傳送的信號也會變動。該起始程序會設定系統 之增益值以為後續資料傳輸中來用。這使得第一次起 始信號交換之前，即必須設定A g C電路2 6之增益值。 因為如果不是這樣，V.34或V.90的起始程序所設定的 信號振幅，就會被AGC改變，也就是說AGC會把起始 程序所設定的準位，改變成不同的數據，使得起始程 序變成無用。這可藉由量測從電話公司中央局所取得 之撥接音調或直流電流之準位而完成上述要求。 隶先接收之信號乃撥接音調，且其準位乃由標準 組織所制定。另外一個方式是量直流電流，因為直流 電流是和迴程之衰減成反比。也就是說從直流電流可 測出迴路之衰減。其與數據信號之傳送準位有固定之 增显關係。所以撥接音調可用以設定A g c電路2 6之增 盈值（以直接或回授方式）以產生接近後續資料傳輸 之較佳之電壓。撥接音調準位以及電壓2 7之間的增益 關係可由實驗’使用一般迴路之回聲解決方法所決 定。非正常之極大回聲可能要求較低之電壓27，以避 免射頻通道中，非線性失真的增加。這可藉由增加χ 之值，例如，一次1 d B。 有瑕疵之回聲消除、熱雜訊（具有不良之信號_ 雜訊比）、及電波干擾等均為傳輸錯誤之源頭。這些 因素可使得數據機14回復為半全雙工操作，而降低資 料傳輸速度（例如，從5 6kb/s下降）且/或引起自動重送 請求’以要求重新傳送數據信號。 19 1239756 射頻發送器2 5將信號轉換為調變後之射頻信 號，而射頻接收器3 8則將調制後的射頻信號轉換為數 ’ 據信號。射頻發送器2 5及射頻接收器3 2在不同的頻率 下工作，且透過雙工器60連結上共用天線29，天線29 傳送调頻h號至遠端無線單元1 2、或接收來自遠端無 線單元1 2之調頻信號。 許多技術可被用來調制射頻發送器2 5之射頻信 號’包括F S K調變，此技術也被廣泛用在有些數位無 線移動電話（大哥大）中。關於FSK，例如V. 90數據 信號，是直接用在射頻發送器25上之調頻器 鲁 (DeWator)。此調頻器對數據信號執行fsk調變， 以V.90之數據信號為例，可直接應用於射頻發送器25 之凋頻器。就調頻器電路而言，是很容易就可得到好 的線性、及低失真。右是需要的話，可以降低信號電 壓’就可進一步再降低失真情形。然而，這亦降低信 號-雜音比至V · 9 0信號所需之值。同時，相對來說， F S K頻道异是較穩定的傳輸媒介。其基頻增益基本上 是不受信號大小影響的（例如，信號衰退）。 _ 微處理器6 1控制基座1 1之功能，並與電話線介面 20、射頻發送器25、及射頻接收器38交談。微處理器 6 1也負責傳送控制信號至遠端無線單元丨2，或從遠端 無線單元1 2接收控制彳§號。在操作上，外部呼叫者（輸 入電話）操作電話線介面20上之鈴聲探測器，以產生 鈴聲指示信號62。微處理器6丨在無線連結上傳送此鈴 聲指示信號62至遠端無線單元12，而其鈐聲開關A 將依接收到之數據而操作反應。此時，傳輸之另一方 20 1239756 白，由 、 " 電腦1 3所發起之電話呼叫將產生由遠端無線單 7t> 1 2 4襄、、， 攻回基座1 1之鉤開關控制信號，微處理器6 j 守透過鉤開關控制信號6 3，以於線路介面2 0上產生 釣離（h〇〇k-off)，即接上電話之狀況。 仏處理器61也負責從900MHz之全部60個可用的 ^ ’自動選擇一相對安靜、無干擾之射頻通道。 圖3為一遠端無線單元1 2電路系統方塊圖，此雷 荠各έ > ，”、、、匕括一個天線3 〇，藉由射頻1 7而從基座1丨接收 类負t匕^[士口各 雔 §唬、且藉由射頻1 7而傳送類比信號至基座丨i。 器3丨藉助於漫遊在相反二方向（往/來於基座Η )之射頻仏號的不同通道頻率，而分開此二信號， 且將之接上射頻接收器3 2或射頻發送器3 3。 退端無線單元1 2包含微處理器34，其控制了遠端 …、線單1 2之一般操作。此外，微處理器3 4從鉤開關 觸發電路36接收一信號35，且發出一鈴聲指示器信號 37=控制鈴聲驅動器38及鈐聲開關39。微處理器 亦藉由射頻連結17而與基座η(圖2)之微處理器Μ進 行通訊。 射頻接收器3 2送出從電話中央局來的解調數據 機數據信號40至複合電路41。而射頻發送器33從複合 電路41接收數據機信號42(發源於數據機ι4)。 複合電路4 1係作為四芯轉二芯之轉換器，其結合 發送信號40及接收信號42(四芯），以使他們可被傳^ 進二芯電話線1 8。複合電路4 1類似基座丨丨之複合電路 21 1239756FIG. 1 shows a wireless communication system 10. The wireless communication system 10 includes a base 11 and a remote wireless unit 12. The components of these two units are the same as or similar to the standard 900 MHz wireless telephone circuit. 0 The remote wireless unit 12 and the computer 1 3 have an interface connection, so that the computer 1 3 uses the built-in modem. 1 4 < Transmits / receives data and establishes a radio frequency (RF) link 17 on a two-core telephone line 18. The computer 13 may be any type of device, such as a laptop, a desktop computer, or a PDA. It has a built-in dial-up modem 14 that complies with ITU V.90 specifications and operates at speeds up to 56 kbps. It should be noted that other types of modems, such as the slower V · 34 type mentioned in the above 15 1239756, can also be used in the above communication methods. -Μ connection interface base 1 1 through a two-core telephone line plugged into a wall phone socket 丨 6 2 to the telephone company's central office and public telephone network (ρ $ 丁 ν) 'wall phone socket 1 6 is a typical RJ 1 1 connector. The base 11 and the reverse wireless unit 12 communicate with each other through a radio frequency (rf) link 17. The radio frequency (RF) link 17 transmits the standard audio channel, which includes the 4kHz 4kHz fundamental frequency spectrum frequency, and this is also the spectrum range occupied by audio signals (for example, V · 90 modem signals) . Therefore, the data signal can be transmitted from the radio frequency base 11 to the remote wireless unit 12 through the wireless communication system (and vice versa). The range of this RF link may vary, but it is basically a few hundred feet or more. After demodulating the signal, this data signal is plugged into the RJ 1 1 electrical cable socket both at both ends through the two-core telephone line 丨 8 and transmitted between the remote wireless unit 12 and the computer 13. Reference Base (also known as proximal unit) Figure 2 is a block diagram of the base 11. In the base, the two sets of circuits closest to the central office of the telephone are: the telephone line interface 20 and the hybrid circuit 21. The telephone line interface 20 is also referred to as a data access split (DAA), which is connected to the equipment of the central telephone station (not shown) through the telephone line 5, the wall socket 16 and the twisted-pair telephone line. ^ 16 1239756 The telephone interface 20 includes a ring tone detector, a switch, a DC (direct current) circuit maintenance circuit, and a 800k converter (not shown). The above-mentioned telephone interface is changed by 20. The grid system can be referred to the patent application No. 09 / 658,049, the name Λ, /. 1 is a wireless modem, and I will not explain it here. … 21 includes-with electricity ... combination and operation magnification 15 (not shown in the figure), the composite circuit 21 converts Erlang's telephone operation to = telephone operation. The most special function of the composite circuit 2 i is: the signals m (which can be "full-duplex operation") that can flow in two opposite directions at the same time on this two-core telephone line, and make it in two Signals can be obtained on different signal lines (Sisi) 22 and 23: the input (from the telephone central office) signal appears on signal line 22 and is output by signal line 23. ^ ^ The composite circuit 21 is a bridge circuit; therefore, the signals of the signal lines ^ and ^ can only be separated if all the impedances connected to the bridge circuit are properly matched. However, it is necessary to consider that impedance mismatch is possible, because it can make the signal of the signal line 23 become a signal returned from the telephone = the company's central part, and appear on the signal line ^, this `` echo "This input signal will be added so that the amplitude of the generated signal 24 is several times higher than the expected signal amplitude. The echo generated signal 24 can cause the RF transmitter 25 to be overloaded and non-linearly distorted. Embedded in the signal 24 After being destroyed by the non-linear distortion, the echo in the middle cannot be effectively eliminated by the echo canceller in the computer 3, the modem 14, and the like. Therefore, in order to reduce the overload and the non-linear distortion, the present invention provides an AGC circuit 26. It is located between the composite circuit 21 of the base ii and the RF transmitter 25. The AGC circuit 26 includes a 17 1239756 peak amplitude detector which provides a time constant long enough so that the output signal 27 can be kept substantially constant The amplitude of the value is within the linear amplification range of the RF transmitter 25. Because a GC circuit 2 6 reduces the non-linear distortion, The connection 17 becomes basically imperceptible. Therefore, the echo canceller in the modem μ will be able to eliminate, and in some cases, all the echoes appearing on the composite signal line 22. AGC circuit 2 6 The FM amplitude of the output signal 27 can also be maintained to prevent it from being reduced to a very low value to meet the loop of the telephone company's central office for a very long distance. A low FM amplitude will result in a low signal-to-noise ratio of the RF signal. When the AGC circuit 26 is used in many intermediate frequency (IF), the non-linear distortion is not a problem. However, when the AGC circuit 26 operates at the fundamental frequency, its linearity requirements are very strict. The solution can be to use a specific linear connection device to Control the voltage to change the gain, or use a resistive step attenuaror, which can be controlled by digital commands. The gain can be controlled directly or by feedback. The direct control system includes measuring the input voltage. 2 4 and adjust the voltage gain to achieve a constant output signal 2 7. In other words, the feedback control system includes measuring the output signal 2 7 and adjusting the gain or attenuation by It maintains a constant value. The purpose of the AGC circuit 26 is to obtain a fixed gain (or attenuation) setting 'to optimize the signal channel during normal operation. However, the V · 34 and V · 90 data systems are used. When the initial process (for example, the handshake process) is required, the process becomes quite complicated. In the case of bidirectional transmission, the initial process includes several steps that last for several seconds. Among them, the amplitude of the transmitted signal will change. The signals transmitted in the two transmission directions will also change. The initial program will set the gain value of the system for subsequent data transmission. This makes it necessary to set the A g C circuit before the first initial signal exchange 2 6 Gain value. Because if this is not the case, the signal amplitude set by the initial program of V.34 or V.90 will be changed by AGC, that is, the AGC will change the level set by the initial program to different data, so that The initial program becomes useless. This can be accomplished by measuring the dial tone or DC current level obtained from the telephone company's central office. The first received signal is a dial tone, and its level is set by the standards organization. Another method is to measure the DC current, because the DC current is inversely proportional to the attenuation of the return trip. In other words, the attenuation of the circuit can be measured from the DC current. It has a fixed display relationship with the transmission level of the data signal. Therefore, the dial tone can be used to set the gain value of A g c circuit 26 (in direct or feedback mode) to generate a better voltage close to subsequent data transmission. The gain relationship between the dial tone level and the voltage 2 7 can be determined by experiment 'using a common loop echo solution method. Abnormally large echoes may require lower voltages27 to avoid an increase in non-linear distortion in the RF channel. This can be done by increasing the value of χ, for example, 1 d B at a time. Defective echo cancellation, thermal noise (with bad signal-to-noise ratio), and radio wave interference are all sources of transmission errors. These factors may cause the modem 14 to revert to half-full duplex operation, reducing the data transmission speed (e.g., from 56 kb / s) and / or causing an auto-retransmission request 'to require retransmission of the data signal. 19 1239756 RF transmitter 25 converts the signal into a modulated RF signal, while RF receiver 38 converts the modulated RF signal into a data signal. The RF transmitter 25 and the RF receiver 3 2 work at different frequencies, and are connected to a common antenna 29 through a duplexer 60. The antenna 29 transmits the FM h number to the remote wireless unit 1 2 or receives the signal from the remote end. FM signal of wireless unit 12. Many techniques can be used to modulate the RF signal of the RF transmitter 25, including FSK modulation. This technique is also widely used in some digital wireless mobile phones (Big Brother). Regarding FSK, for example, the V. 90 data signal is a frequency modulator (DeWator) used directly on the RF transmitter 25. This frequency modulator performs fsk modulation on the data signal. Taking the data signal of V.90 as an example, it can be directly applied to the frequency transmitter of the RF transmitter 25. As far as the FM circuit is concerned, it is easy to get good linearity and low distortion. On the right, if necessary, the signal voltage can be reduced to further reduce the distortion. However, this also reduces the signal-to-noise ratio to the value required for a V · 90 signal. At the same time, F S K channel is relatively stable transmission medium. Its fundamental frequency gain is essentially independent of signal size (for example, signal degradation). _ The microprocessor 61 controls the functions of the base 11 and talks with the telephone line interface 20, the RF transmitter 25, and the RF receiver 38. The microprocessor 61 is also responsible for transmitting or receiving control signals to or from the remote wireless unit 12. In operation, an external caller (input telephone) operates a ring detector on the telephone line interface 20 to generate a ring indication signal 62. The microprocessor 6 丨 transmits this ringing indication signal 62 to the remote wireless unit 12 on the wireless link, and its beep switch A will operate and respond according to the received data. At this time, the transmitting party 20 1239756 white, the telephone call initiated by "" computer 1 3 will generate a remote switch 7t > 1 2 4 Xiang ,, and return the hook switch control signal to base 1 1 The microprocessor 6 j keeps on the hook switch control signal 63 to generate a hook-off (h00k-off) on the line interface 20, that is, the state of being connected to the phone. The processor 61 is also responsible for automatically selecting a relatively quiet, interference-free RF channel from all 60 available ^ 's at 900 MHz. Fig. 3 is a block diagram of a remote wireless unit 12 circuit system. The antennas each include an antenna 3 0, and receive a negative t-like signal from the base 1 through radio frequency 17. ^ [Shikou each 雔 §, and transmits an analog signal to the base via radio frequency 17 i. Device 3 丨 the difference between the radio frequency numbers in the opposite two directions (to / from the base 借助于) by roaming Channel frequency, and separate these two signals, and connect them to the RF receiver 3 2 or RF transmitter 3 3. The back-end wireless unit 1 2 contains a microprocessor 34, which controls the remote ..., line list 1 2 Normal operation. In addition, the microprocessor 34 receives a signal 35 from the hook switch trigger circuit 36 and sends out a ring indicator signal 37 = controls the ring driver 38 and the snoring switch 39. The microprocessor also uses the RF link 17 to Communicates with the microprocessor M of the base η (Fig. 2). The radio frequency receiver 32 sends out the demodulated modem data signal 40 from the telephone central office to the composite circuit 41. The radio frequency transmitter 33 receives the composite circuit 41 Modem signal 42 (derived from Modem 4). Composite circuit 4 1 is used as a four-core to two-core turn Device, which binds to the transmission signal 40 and the received signal 42 (quads), so that they may be transmitted into the two-wire phone line ^ 1 8. The composite circuit 41 is similar to the base of the composite circuit Shushu 211239756
的AGC電路45加入遠端無線單元12中。 46隨著在數據 鉤開關觸發器電路3 6之觸發冑$ 機14内之釣開關的開起（“鉤上”），而成為零伏特。在 數據機丨4鉤離（開始通訊）後’數據機14内鉤開關即關 閉，且一 D C電流開始流動， 從遠端無線單元1 2之電 池電壓+ vb流出，並流經遠端無線單元12之電阻R1， Rb，R2及此數據機14内DC迴路維持電路所提供之電5 阻（和電話線介面20中之電路一樣）。電壓46因此成為 正值，且鉤開關觸發器電路3 6將鉤開關控制電壓3 5 初始化。鉤開關控制電壓35於基座1丨之電話線介面2〇 中，操作此鉤開關（來到，，鉤離，，狀態）。 從電話中央局傳送來之輸入電話產生了鈴聲指 不器電壓3 7，如上所述，可用以操作鈴聲驅動器3 8。 龄聲驅動器38正常地運作，而透過鈐聲信號48及一具 有壓電換能器（圖未示）’而生成一聽得見之鈐聲。對 於無線通訊系統1 〇中之遠端無線單元1 2，可聽見之龄 聲是不需要的。鈐聲信號4 8在此是用作信號來操作電 腦13中數據機14之鈐聲電路。其在鈴聲變壓器49中第 次被轉換為高電壓後’再透過鈴聲開關3 9而施加於 22 1239756 線路1 8。來自無線晶片組之鈐聲信號4 8比來自電話中 央局之尋常之鈐聲信號（16至68 Hz)具有更高之頻率 (達到數KHz高），以操作數據機1 4内部之鈴聲電路。 所以必需將鈴聲驅動器3 8以高頻電路來替代低頻電 路。因為低頻鈐聲電路為整體相關且昂貴，有時可以 省略之。這樣的裝置無法同時撥接到數據機以及其相 關之電腦，這使得行動撥接時無法接收正在進行之傳 真以及存取電腦。 遠端無線單元12(圖3)可從電池（圖未示）中獲得 電力。此一電池可在遠端無線單元12置入基座11所提 供之托架（c r a d 1 e )内時充電。跟隨標準無線電話之 規定，每次遠端無線單元被置入托架内充電時，即可 更改密碼，如此將可防止從其它遠端單來的未授權之 空中攔截而存取此基座。 電源的另外一種方式係透過U S B纜線，從電腦中 取得所需之操作電壓。如果用此方式，則密碼的取得 方式就和前述的方法不同，例如使用一個固定之密碼 並將此密碼儲存於遠端無線單元12之EEPROM 56(電 子式可清除程式化唯讀記憶體）中。 除了使用纜線以連接至可攜式電腦之USB連接 器，遠端無線單元12亦可包括一個USB連接器，例如 圖4之無線棒10a (wireless stick)。無線棒10a可直 接插入可攜式電腦。電話線1 8 (圖未示）的每一端係包 括一個RJ 1 1插頭，可用以將無線棒1 0 a連接至可攜式 電腦之數據機輸入端。 23 1239756 如圖4所示’遠端無線單元丨2之另一實施例係包 括個個人電月自5己憶卡國際協會（Personal Computer Memory Card International Association^ PCMCIA) 卡10b並使用可攜式電腦13之電力。在此組態下，遠 端無線單元1 2可插入可攜式電腦1 3。 如此一來’可攜式電腦13可藉由PCMCIA卡10b， 以提供遠端無線單元1 2所需電力以建立無線連接。可 I式電服1 3之數據機端以及作為無線連接之p c μ c j a 卡l〇b之間的數據信號可藉由電話線來連結傳送。 無線連結：螫重功能之益 無線通訊系統1 〇可包含與標準無線電話相同之 功能，如提供有揚聲器54及麥克風55之電話筒、一撥 唬盤、電治鈴及其它各樣物項。這些物項可包含在無 線通訊系統10之中，如此可允許無線通訊系統10擁有 又重功肖b，即，既可像無線電話機一般地用來傳送聲 音或如像前面所述地方式傳送數據資料。 圖5為雙重功能無線電話之方塊圖。切換器5 2係_ 用以切換無線電話以及無線數據機的功能。開關控制 信號係用以識別鉤開關控制器35。當數據機14未連 結到電話線18時（如圖卜斤示），電壓46為零且切換 器52將射頻接收器32連結至揚聲器54、將麥克風55 j、、口至射頻發送器3 3。同一時間，信號”表示微處理 态3山4内部或閘（〇R gat〇《一個輸入端，# 一個輸 入端係由無線電話機話筒之ph〇Ne按鈕所致能。 24 1239756 信號3 5更可依撼該單开η 像％早70疋否使用於電話或數據 傳輸來按下或移除壓伸器線路Uompande Wit)。 ’ 也就是說’當用於無線電話機時，本機將使用音調（ synab1C)壓伸器以改進語音傳輸時之信號_雜音比。 在本文巾’壓伸器於接收聲音時（圖未示），係包括 作用於輸出信號27之壓縮器（如圖2所示）以及作用 於射頻接收器32 (如圖3所示）輸出端4〇之延申器。 壓神器導致少許之非線性失真，其對數據傳輸係有害 的。壓伸器亦導致傳輸通道產生小量增益變動，稱之 為追蹤錯誤，其對V.34及V.90數據傳輸之開始通信時鲁 係有害的。幸運的是，壓伸器在數據傳輸時並非需要 ’因為A G C電路2 6將處理準位變動之問題。所以在數據 傳輸時可移除壓伸器。AGC電路26以及45在電話模式 運作時不需移除。 ' $ 當電活聽筒置入基座11所提供之托架而進行充 電時，雙重功能無線電話之遠端無線單元丨2 (電每辭、 筒）係依賴電池而運作。圖6之電話聽筒100係為_現 存之範例。 更特別的是，標準無線電話機在加入了圖2及圖^ 所示之電路後，亦可被當作無線通訊連結丨〇 一樣而提 供服務以傳送數據。此時’電話聽筒和電話線插座 (RJ 1 1)裝配起來以與電腦數據機互相連結。 如圖7所示，本發明亦能用於雙線之無線電話。 在此方式中，上述無線電話將有兩個獨立電話線路， 其中之一僅提供語音信號（無線電話）。另一個僅數 據信號（無線連接）、或語音及數據信號（雙重功& 25 1239756 無線電話）。圖7之電路糸統係用以建立及提供如 PCMCIA卡10b或USB無線棒10a所示之無線連接。 另一實施例係使用單一電話線以建立無線連接 。本實施例可包括如圖7所示之二個遠端無線單元： 一個是電話聽筒以及一可攜式無線連結單元。該電話 線可用於電話應用時，可用以傳送語音，或藉由無線 連接而傳輸數據，但不能同時用於語音及數據。 可想而知地，標準無線電話可以用本發明來修改為 雙重功能之無線電話。 本發明將不以圖1至圖7所示之軟體或硬體組態 零 為限。 本發明亦不以上述藉由射頻頻帶以傳輸資料、或上 述之特定調變技術為限。 上述實施例僅係為了方便說明而舉例而已。本發 明所主張之權利範圍自應以申請專利範圍所述為 準，而非僅限於上述實施例。 五、圖式簡單說明 _ 圖1為一無線連結之方塊圖。 圖2為一用以建立無線連結之基座之方塊圖。 圖3為一用以建立無線連結之遠端無線單元之方 塊圖。 圖4為藉由PCMCIA卡以及USB棒以建立無線連 接之不意圖。 圖5為一雙功能無線電話的遠端無線單元之方塊 圖0 26 1239756 圖6為一雙功能無線電話的示意圖。 圖7為另一功能用途的無線電話系統之示意圖。 圖號說明 1 0無線通訊系統 10b PCMCIA卡 1 2遠端無線單元 1 4數據機 1 6電話插座 1 8二芯電話線 2 1複合電路 2 3訊號線 25射頻發送器 27輸出信號 3 0天線 32射頻接收器 3 4微處理器 3 6鉤開關觸發電路 3 8鈐聲驅動器 40數據機信號 42數據機信號 44運算放大器 46觸發電壓 49鈴聲變壓器 52開關器 55麥克風 10a無線棒 11基座 13電腦 1 5二芯電話線 1 7射頻連結 2 0電話線介面 2 2訊號線 24信號 26 AGC電路 29天線 3 1雙工器 3 3射頻發送器 3 5信號 3 7鈴聲指示器信號 39鈴聲開關 4 1複合電路 43運算放大器 45AGC電路 48鈐聲信號The AGC circuit 45 is added to the remote wireless unit 12. 46 With the trigger of the data hook switch trigger circuit 36, the trigger switch ("hook on") in the machine 14 becomes zero volts. After the modem 4 is disconnected (starting communication), the hook switch of the modem 14 is turned off, and a DC current begins to flow, flowing from the battery voltage + vb of the remote wireless unit 12 and flowing through the remote wireless unit. The resistance R1, Rb, R2 of 12 and the electrical resistance provided by the DC circuit maintenance circuit in the modem 14 are the same as those in the telephone line interface 20. The voltage 46 thus becomes a positive value, and the hook switch trigger circuit 36 initializes the hook switch control voltage 3 5. The hook switch control voltage 35 is operated in the telephone line interface 20 of the base 1 丨 and the hook switch is operated (coming ,, hooking off ,, state). The incoming call transmitted from the telephone central office generates a ring pointer voltage 3 7, which can be used to operate the ring driver 3 8 as described above. The age sound driver 38 operates normally, and generates an audible sound through the sound signal 48 and a piezoelectric transducer (not shown) '. For the remote wireless unit 12 in the wireless communication system 10, the audible age sound is not required. The snoring signal 48 is used as a signal to operate the snoring circuit of the modem 14 in the computer 13. After being converted to high voltage for the first time in the ringing transformer 49 ', it is applied to 22 1239756 line 18 through the ringing switch 39. The chirp signal 48 from the wireless chipset has a higher frequency (up to several KHz) than the usual chirp signal (16 to 68 Hz) from the telephone central office to operate the ringer circuit inside the modem 14. Therefore, it is necessary to replace the low-frequency circuit with a high-frequency circuit by the ring-tone driver 38. Because low-frequency chirping circuits are integral and expensive, they can sometimes be omitted. Such a device cannot be dialed to the modem and its associated computer at the same time, which makes it impossible to receive ongoing faxes and access the computer during mobile dialing. The remote wireless unit 12 (Figure 3) can receive power from a battery (not shown). This battery can be charged when the remote wireless unit 12 is placed in the bracket (c r a d 1 e) provided by the base 11. Following the standard wireless phone regulations, each time the remote wireless unit is placed in the cradle for charging, the password can be changed. This will prevent unauthorized aerial interception from other remotes and access to the base. Another method of power supply is to obtain the required operating voltage from the computer through a USB cable. If this method is used, the method of obtaining the password is different from the previous method. For example, a fixed password is used and the password is stored in the EEPROM 56 (electronic erasable programmable read-only memory) of remote wireless unit 12. . In addition to using a cable to connect the USB connector of the portable computer, the remote wireless unit 12 may also include a USB connector, such as the wireless stick 10a (wireless stick) in FIG. 4. The wireless stick 10a can be directly plugged into a portable computer. Each end of the telephone line 18 (not shown) includes an RJ 1 1 plug, which can be used to connect the wireless stick 10 a to the modem input end of the portable computer. 23 1239756 As shown in Fig. 4, another embodiment of the "remote wireless unit 2" includes a personal electric memory card from Personal Computer Memory Card International Association (PCMCIA) card 10b and a portable computer. 13 of electricity. In this configuration, the remote wireless unit 12 can be plugged into a portable computer 1 3. In this way, the 'portable computer 13 can provide the power required by the remote wireless unit 12 to establish a wireless connection through the PCMCIA card 10b. The data signals between the data terminal of the I-type electrical service 13 and the p c μ c j a card 10 b as a wireless connection can be transmitted through a telephone line. Wireless link: the benefits of important functions The wireless communication system 10 can include the same functions as a standard wireless phone, such as a telephone tube with a speaker 54 and a microphone 55, a dial, a bell, and other items. These items can be included in the wireless communication system 10, which allows the wireless communication system 10 to possess and work harder, that is, it can be used as a wireless telephone to transmit sound or to transmit data as described above data. FIG. 5 is a block diagram of a dual function radiotelephone. Switcher 5 2 Series_ Used to switch the functions of wireless phones and wireless modems. The switch control signal is used to identify the hook switch controller 35. When the modem 14 is not connected to the telephone line 18 (as shown in the figure), the voltage 46 is zero and the switch 52 connects the RF receiver 32 to the speaker 54, the microphone 55 j, and the port to the RF transmitter 3 3 . At the same time, “signal” indicates the internal state or gate of the micro-processing state (〇R gat〇 《One input terminal, # One input terminal is enabled by the ph〇Ne button of the radio telephone microphone. 24 1239756 Signal 3 5 is more available It depends on whether the single opening η image% 70% is used for telephone or data transmission to press or remove the indenter line Uompande Wit). That is to say, when used in a wireless telephone, the unit will use the tone ( synab1C) stretcher to improve the signal_noise ratio during speech transmission. In this paper, when the stretcher receives sound (not shown), it includes a compressor that acts on the output signal 27 (as shown in Figure 2). And the extension device acting on the output terminal 40 of the RF receiver 32 (as shown in Fig. 3). The compression device causes a little nonlinear distortion, which is harmful to the data transmission system. The compression device also causes a small amount of transmission channels. Gain changes, called tracking errors, are detrimental to the communication at the beginning of V.34 and V.90 data transmission. Fortunately, the stretcher is not required for data transmission because the AGC circuit 26 will process The problem of level changes. It can be removed during data transmission. The AGC circuits 26 and 45 do not need to be removed when operating in telephone mode. '$ When the electric handset is placed in the cradle provided by the base 11 for charging, the dual-function radiotelephone The remote wireless unit 丨 2 (telephone, tube) operates on the battery. The telephone handset 100 in Figure 6 is an existing example. More specifically, the standard wireless telephone has been added to Figure 2 and Figure ^ After the circuit shown, it can also be used as a wireless communication link to provide services to transmit data. At this time, the 'telephone receiver and telephone line socket (RJ 1 1) are assembled to connect with the computer modem. As shown in the figure As shown in Figure 7, the present invention can also be used for two-line wireless telephones. In this way, the above-mentioned wireless telephones will have two independent telephone lines, one of which only provides a voice signal (wireless telephone) and the other only a data signal ( Wireless connection), or voice and data signals (dual power & 25 1239756 wireless telephone). The circuit system of FIG. 7 is used to establish and provide a wireless connection as shown in the PCMCIA card 10b or USB wireless stick 10a. Another implementation Example A single telephone line is used to establish a wireless connection. This embodiment may include two remote wireless units as shown in FIG. 7: one is a telephone handset and a portable wireless link unit. This telephone line can be used when it is used in a telephone application It can transmit voice, or transmit data through wireless connection, but cannot be used for both voice and data. It is conceivable that the standard wireless telephone can be modified by the present invention into a dual-function wireless telephone. The present invention will not be illustrated The software or hardware configuration shown in 1 to 7 is limited. The present invention is not limited to the above-mentioned transmission data through the radio frequency band, or the above-mentioned specific modulation technology. The above embodiments are only for convenience of explanation. Just for example. The scope of the rights claimed in the present invention should be based on the scope of the patent application, not limited to the above embodiments. V. Brief description of the diagram _ Figure 1 is a block diagram of a wireless connection. FIG. 2 is a block diagram of a base for establishing a wireless link. Figure 3 is a block diagram of a remote wireless unit used to establish a wireless link. Figure 4 is a schematic diagram of establishing a wireless connection by using a PCMCIA card and a USB stick. Figure 5 is a block diagram of a remote wireless unit of a dual-function wireless telephone. Figure 0 26 1239756 Figure 6 is a schematic diagram of a dual-function wireless telephone. FIG. 7 is a schematic diagram of a wireless telephone system for another functional purpose. Description of drawing number 1 0 wireless communication system 10b PCMCIA card 1 2 remote wireless unit 1 4 modem 1 6 telephone socket 1 8 two-core telephone line 2 1 composite circuit 2 3 signal line 25 RF transmitter 27 output signal 3 0 antenna 32 RF Receiver 3 4 Microprocessor 3 6 Hook Switch Trigger Circuit 3 8 Snoring Driver 40 Modem Signal 42 Modem Signal 44 Operational Amplifier 46 Trigger Voltage 49 Ringing Transformer 52 Switch 55 Microphone 10a Wireless Rod 11 Base 13 Computer 1 5 Two-core telephone line 1 7 Radio frequency connection 2 0 Telephone line interface 2 2 Signal line 24 signal 26 AGC circuit 29 Antenna 3 1 Duplexer 3 3 Radio frequency transmitter 3 5 Signal 3 7 Ring indicator signal 39 Ring switch 4 1 Composite Circuit 43 operational amplifier 45 AGC circuit 48 chirp signal
5 1開關控制信號 54揚聲器 56EEPROM5 1 Switch control signal 54 Speaker 56EEPROM
27 1239756 60雙工器 61微處理器 62鈐聲指示器信號 63鉤開關控制信號 1 0 0電話聽筒27 1239756 60 Duplexer 61 Microprocessor 62 Snoring indicator signal 63 Hook switch control signal 1 0 0 Telephone handset
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