KR101993178B1 - Multi-signal repeater and wireless communication system thereby - Google Patents

Abstract

Disclosed are a multi-signal repeater for communication between a base station and a user terminal, and a wireless communication system including the same. The multi-signal repeater comprises: a transmitting and receiving antenna for transmitting and receiving signals between the base station and the terminal; an up-down converter for down-converting the signals received by the transmitting and receiving antenna, and up-converting signals to be transmitted through the transmitting and receiving antenna; an analog-to-digital converter for converting the signals down-converted by the up-down converter into a digital signal; a channel filter for passing only signals of a specific channel among the digital signals converted by the analog-to-digital converter; a power detecting/switching unit for detecting power of the signals having passed through the channel filter and turning off the signals having power lower than a predetermined level; a digital-to-analog converter for converting the signals not turned off by the power detecting/switching unit into an analog signal; and an amplifying unit for amplifying the analog signal up-converted by the up-down converter after being converted by the digital-analog converter, wherein the analog signal amplified by the amplifying unit is transmitted through the transmitting and receiving antenna. The multi-signal repeater of the present invention can be easily installed and set up by a general user for general appliances with simple instructions.

Description

[0001] MULTI-SIGNAL REPEATER AND WIRELESS COMMUNICATION SYSTEM [0002] BACKGROUND OF THE INVENTION [0003]

The present invention relates to a multi-signal repeater and a wireless communication system including the multi-signal repeater. More particularly, the present invention relates to a multi-signal repeater and a wireless communication system including the same, And a wireless communication system including the multi-signal repeater.

In general, in the case of wireless communication services, a radio-shaded area refers to a region where communication with the radio communication base station is not smooth due to weak signal intensity due to geographical or other environmental factors such as artificial structures such as buildings, mountains, Area. A repeater equipped with an amplifier is used for wireless communication in a radio wave shadow area. In order to solve the shadow area and receive the wireless communication service, the subscriber of the communication service requests separately from the corresponding communication company to request a specialist business trip from the communication company and inconvenience to receive help. Otherwise, if a subscriber wants to install a general repeater to use the communication service, amplifiers in all the unnecessary frequency bands are amplified by the amplifier in the repeater, and there is a problem that communication is difficult on the subscriber's terminal side. In addition to the difficulty in setting up and setting up the repeater, it is difficult for the users who want to use different communication services or the different communication companies of the respective users to communicate with the base station, Inconvenience, or additional installation cost. Therefore, there is a need in the art to solve such inconveniences or problems.

A problem to be solved by the present invention is to solve the difficulties in installation and setting of a conventional repeater in the installation of a repeater for solving a radio wave shadow area and to provide a new Signal repeater and a wireless communication system including the multi-signal repeater.

According to an aspect of the present invention, there is provided a multi-signal repeater for communication between a base station and a user terminal, comprising: a transmission / reception antenna for transmitting and receiving signals between a base station and a terminal; Down converter for frequency up-converting signals to be transmitted through the transmission / reception antenna and for up-converting signals to be transmitted through the transmission / reception antenna, an analog-to-digital converter for converting the frequency down- A channel filter for passing only signals of a specific channel among the digital signals converted by the analog-to-digital converter; and a detector for detecting the power of the signals having passed through the channel filter, A power detecting / switching unit for causing the power detecting / An amplifier for amplifying the frequency-up-converted analog signal by the up-down converter after being converted by the digital-to-analog converter; And the analog signal is transmitted through the transmission / reception antenna.

According to one embodiment, the transmitting and receiving antenna receives a plurality of signals in a predetermined frequency band, and the channel filter includes a plurality of filters such that the plurality of signals can be selectively filtered for each of a plurality of signals received through the transmitting and receiving antenna. .

According to one embodiment, the multi-signal repeater may include a gain control for regulating power between signals not turned off by the power detecting / switching unit between the power detecting / switching unit and the digital-analog converter .

According to one embodiment, the gain control unit adjusts the powers of the signals not turned off by the power detecting / switching unit equally.

According to one embodiment, the channel filter, the power detection / switching unit, and the gain control unit are implemented by an FPGA (Field Programmable Gate Array).

According to an aspect of the present invention, there is provided a wireless communication system including a plurality of base stations for providing wireless communication services with signals of different frequency bands, A wireless communication system including a plurality of user terminals and a multi-signal repeater for relaying between the base stations and the user terminals, wherein the multi-signal repeater is configured to transmit and receive signals between the base stations and the terminal An up-down converter for frequency up-converting signals received from the transmission / reception antenna and frequency-up-converting signals to be transmitted through the transmission / reception antenna; and an up-down converter for down- An analog-to-digital converter for converting the converted signals into a digital signal, A channel filter for passing only signals of a specific channel among the digital signals converted by the analog-to-digital converter, and a controller for detecting the power of the signals having passed through the channel filter to turn off signals having a power not higher than a predetermined level A digital-to-analog converter for converting signals not turned off by the power detecting / switching unit into an analog signal; and a digital-to-analog converter An amplification unit for amplifying the frequency up-converted analog signal, and an analog signal amplified by the amplification unit is transmitted through the transmission / reception antenna.

According to one embodiment, the multi-signal repeater may include a gain control for regulating power between signals not turned off by the power detecting / switching unit between the power detecting / switching unit and the digital-analog converter .

The multi-signal repeater and the wireless communication system including the multi-signal repeater of the present invention allow the user to communicate with the base station using the signals of the frequency band that the user desires to use through the terminal, . In addition, the multi-signal repeater of the present invention can be easily installed and set up by general user and general user with simple instructions.

FIG. 1 is a block diagram illustrating a multi-signal repeater and a wireless communication system including the same according to an embodiment of the present invention.
Figs. 2-7 illustrate examples of signals in the respective processing stages of the multi-signal repeater of Fig. 1. Fig.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the embodiments with reference to the accompanying drawings and the drawings are simplified and exemplified by those skilled in the art in order to facilitate understanding of the present invention.

Referring to FIG. 1, a multi-user terminal for communication with a base station (BTS1, BTS2, ..., BTSn) and a user terminal (T1, T2, ..., Tm) The signal repeater 100 includes a transmission and reception antenna ANT, an up-down converter 110, an analog-to-digital converter 120, a channel filter 131, a power detection / switching section 132, 140, an MCU 150, and an amplification unit 160. The multi-signal repeater 100 further includes a gain control unit 133 between the power detecting / switching unit 132 and the digital-to-analog converter 140.

The transmission / reception antenna ANT receives signals from the base stations BTS1, BTS2, ..., BTSn or transmits signals to the user terminals T1, T2, ..., Tm, T2, ..., Tm or transmit signals to the base stations (BTS1, BTS2, ..., BTSn). The former is represented by a downlink and the latter by an uplink. Here, the signals may be in various forms such as voice, text, and the like. Also, in this specification, the multi-signals are signals having various center frequencies within a predetermined bandwidth, and an example is shown in Fig.

The up-down converter frequency downconverts the signals of the RF band received by the transmission / reception antenna ANT to signals of a baseband or intermediate frequency (IF) band, The baseband or intermediate frequency (IF) band signals to be transmitted via the transmission / reception antenna ANT, i.e., baseband or intermediate frequency (IF) analog signals converted through the digital- That is, a frequency up-conversion to signals of a high frequency (RF) band. Throughout this specification, the term frequency down-conversion or frequency up-conversion is used in the same sense.

The analog-to-digital converter 120 converts the frequency down-converted signals by the up-down converter 110 into a digital signal.

The channel filter 131 passes only signals of a specific one of the digital signals converted by the analog-to-digital converter 120. Here, the signals of the specific channel are preset by the user regardless of the strength of the signal, that is, the level of the power (unit: dBm).

The power detection / switching unit 132 detects the power (dBm) of the signals having passed through the channel filter 131 to turn off signals having a power lower than a predetermined level, and outputs a signal having a power higher than a predetermined level Only the people turn on. Although not shown in detail in FIG. 1, the power detecting / switching unit 132 includes a component for detecting the power of signals passed through the channel filter 131, a component for comparison with a predetermined level And may have components for turning on or off the signals separately.

The digital-to-analog converter 140 converts only the signals which are located at the rear end of the power detecting / switching unit 132 and not turned off by the power detecting / switching unit 132 into analog signals.

The amplification unit 160 amplifies the frequency-up-converted analog signal by the up-down converter after being converted by the digital-analog converter. The analog signal amplified by the amplification unit 160 is transmitted through the transmission / reception antenna ANT.

The transmission and reception antenna ANT receives a plurality of signals in a predetermined frequency band and the channel filter 131 filters the plurality of filters to be selectively filterable for each of the plurality of signals received through the transmission and reception antenna ANT. .

As described above, the multi-signal repeater 100 further includes a gain control unit 133. The gain control unit 133 includes a power detection / switching unit 132 and a digital-to-analog converter 140) and adjusts the power (unit: dBm) for the signals not turned off by the power detecting / switching unit 132. [ There are many ways to control power. For example, the powers of the signals not turned off by the power detection / switching unit 132 can be controlled equally. In adjusting the power equally, the reference power value may be the power value of the signal having the lowest power among the signals not turned off, or may be the average value of the signal having the lowest power and the signal having the highest power.

The channel filter 131, the power detection / switching unit 132, and the gain control unit 133 are implemented by an FPGA (Field Programmable Gate Array) in order to apply variously according to a wireless communication environment, a service frequency, .

The setting of the threshold levels of the specific channels to be passed by the channel filter 131 and the signals to be turned off by the power detecting / switching section 132 are appropriately set and adjusted by the MCU 150.

Figs. 2-7 illustrate examples of signals in the respective processing steps, in which the signals are simply represented by arrows in the frequency domain with only the center frequency.

FIG. 2 is a diagram illustrating signals in frequency bands of communication companies (companies A, B,..., N) used in wireless communication with base stations BTS1, BTS2, Center frequency. It should be noted that the number of signals in the frequency range allocated to each communication company is illustrated in FIG. 2, and the intensity of the signal is also somewhat exaggerated. For example, among the signals of the company A, the center frequencies of the specific channels to be passed by the channel filter 131 are f11, f12, f13, f14 and f15. Of the signals of the B company, The center frequencies of the specific channels to be passed by the channel filter 131 among the signals of the C company are fn1, fn2, fn3, fn4, fn5, and fn6, Are indicated by relatively thick arrows. For example, considering only the downlink, the frequency band of Company A may be 2110 MHz to 2130 MHz, the frequency band of Company B may be 2130 MHz to 2150 MHz, the frequency band of Company C may be 2150 to 2170 MHz, Are examples of center frequencies within this band. As described above, a plurality of signals are received from the base stations through the transmission / reception antenna ANT, amplified, and transmitted to the user terminal. Here, if the signals illustrated in FIG. 2 are all amplified in the repeater and then transmitted to the user terminal, for example, if it is assumed that the user terminal is subscribed to the company A, the user wants to receive the communication service using the signal having the center frequency f13 The user terminal side only receives a signal having a center frequency of f12 or f14, which has a relatively large signal strength (dBm), and thus has a problem that communication is not smooth. Therefore, in the multi-signal repeater of the present invention, only the signals of a specific channel are filtered and filtered, and signals of a predetermined level or lower are turned off, amplified, and transmitted to the user terminal.

3 is a diagram showing examples of signals after passing through the up-down converter 110, and the characteristics of the signals after the analog-digital converter 120 step are similar to each other, and thus are not shown separately. As shown, the signals are frequency downconverted to the baseband or intermediate frequency (IF) band by the up-down converter 110 (0 Hz will be centered when considering the uplink, , And then goes through the analog-to-digital converter 120. The frequencies of the high frequency (RF) band (f11 to f15 of Company A, f21 to f25 of Company B, and fn1 to fn6 of Company N) shown in FIG. 2 correspond to the frequencies of the baseband or intermediate frequency The same reference numerals are used for different frequencies and for convenience.

Figure 4 is an example of signals after passing through the channel filter 131, i. E., Only passing signals of a particular channel. As shown in the figure, only f11 to f15 of the A company, f21 to f25 of the B company, and fn1 to fn6 of the N company are selected and all the remaining signals are blocked by the channel filter 131. [ Thus, the channel filter 131 is configured to include filters corresponding to the signals so as to selectively block the channels.

5 shows examples of signals after passing through the power detecting / switching unit 132. The power detecting / switching unit 132 turns off signals having a predetermined power level or lower. The signals having the center frequencies f11, f15, f25, and fn1, which are power levels lower than the predetermined level SLL, are all turned off by the power detection / switching unit 132. [ In FIG. 5, the number of signals to be turned off or the number of signals which are not turned off by the power detecting / switching unit 132 are plural. Alternatively, a predetermined level SLL may be set differently, (E.g., f12, f21, and fn3) for each communication company in the frequency band.

6 shows examples of signals after passing through the gain control unit 133. As shown in the figure, power is supplied to the gain control unit 133 for signals not turned off by the power detection / switching unit 132, . The signals after being converted into analog signals by the digital-analog converter are not shown separately because their characteristics in the frequency domain are similar.

Switching unit 132 under the control of the MCU 150 so as to have the power of a predetermined level (SAL) or to have an average value of signals not turned off by the power detecting / switching unit 132 The power is adjusted. The gain control unit 133 adjusts the power levels of the signals to be substantially equal to each other.

FIG. 7 shows examples of signals that have been frequency up-converted through the up-down converter 110. The up-converter 110 frequency up-converts the signals of the base band or the intermediate frequency (IF) band into signals of a high frequency (RF) band corresponding to the corresponding service band, And then transmitted through the transmission / reception antenna ANT.

In this way, the multi-signal repeater 100 of the present invention filters only signals of a specific channel in order to facilitate communication with a base station in a radio wave shadow area, and after filtering, And transmitted to the user terminal side, so that the user terminal can smoothly communicate using the frequency band of the communication company.

An example of a wireless communication system including the multi-signal repeater 100 according to an embodiment of the present invention is as follows.

A wireless communication system including a multi-signal repeater according to the present invention includes a plurality of base stations for providing wireless communication services with signals of different frequency bands, a plurality of base stations for providing wireless communication services to the base stations, And a multi-signal repeater for relaying between the user terminals and the base stations and the user terminals, wherein the multi-signal repeater is a multi-signal repeater, 100).

A multi-signal relay method for communication between a base station and a user terminal using a multi-signal repeater 100 of the present invention includes the steps of: (a) receiving signals from a base station; (b) (C) converting frequency downconverted signals to digital signals in step (b); (d) converting signals down-converted into digital signals in step (c) (E) detecting the power of the signals passed in the step (d) to turn off signals having a power lower than a predetermined level, (f) (G) converting power-adjusted signals to analog signals in step (f), (h) converting the signals converted into analog signals in step (g) To frequency up-convert Step, (i) a step, and (j) transmitting the signals amplified by the (i) amplifying the signals frequency-up conversion from the (h) step.

The multi-signal repeater according to embodiments of the present invention and the wireless communication system including the multi-signal repeater have been described above, and the scope of the present invention is not limited by the above description, but is defined by the following claims. .

100: Multi-signal repeater
110: Up-down converter
120: Analog-to-digital converter
130: FPGA
131: Channel filter
132: Power Detecting / Switching Unit
133: Gain control unit
140: Digital-to-Analog Converter
150: MCU
160:
ANT: Transmitting / receiving antenna
BTS1, BTS2, ..., BTSn: Base station
T1, T2, ..., Tm: User terminal

Claims (8)

A multi-signal repeater for communication between a base station and a user terminal,
A transmitting and receiving antenna for transmitting and receiving signals between the base station and the terminal;
An up-down converter for frequency downconverting signals received from the transmission / reception antenna and frequency up-converting signals to be transmitted through the transmission / reception antenna;
An analog-to-digital converter for converting the frequency down-converted signals by the up-down converter into a digital signal;
A channel filter for passing only signals of a specific channel among the digital signals converted by the analog-to-digital converter;
Detecting a power of signals having passed through the channel filter to turn off signals having a power lower than a predetermined level among all the signals having passed through the channel filter and passing only signals having a power exceeding a predetermined level, Detecting / switching unit;
A gain control unit for adjusting the power of signals passed through the power detection / switching unit such that all of the signals passed through the power detection / switching unit have an average value of the signals passed through the power detection / switching unit;
A digital-to-analog converter for converting the power-adjusted signals into an analog signal by the gain control unit; And
An amplifier for amplifying the frequency-up-converted analog signal by the up-down converter after being converted by the digital-analog converter, and an analog signal amplified by the amplifier is transmitted through the transmission / reception antenna Wherein the multi-signal repeater is a multi-signal repeater.
The method according to claim 1,
Wherein the transmission and reception antenna receives a plurality of signals in a predetermined frequency band and the channel filter includes a plurality of filters so as to be selectively filterable for each of a plurality of signals received through the transmission and reception antenna, Multi-signal repeater.
delete delete The method according to claim 1,
Wherein the channel filter, the power detection / switching unit, and the gain control unit are implemented as FPGAs (Field Programmable Gate Array).
A plurality of base stations providing wireless communication services with signals of different frequency bands, a plurality of user terminals receiving wireless communication services with respect to each of the base stations, A wireless communication system comprising a multi-signal repeater for relaying,
The multi-signal repeater comprising:
A transmitting and receiving antenna for transmitting and receiving signals between the base stations and the terminal;
An up-down converter for frequency downconverting signals received from the transmission / reception antenna and frequency up-converting signals to be transmitted through the transmission / reception antenna;
An analog-to-digital converter for converting the frequency down-converted signals by the up-down converter into a digital signal;
A channel filter for passing only signals of a specific channel among the digital signals converted by the analog-to-digital converter;
Detecting a power of signals having passed through the channel filter to turn off signals having a power lower than a predetermined level among all the signals having passed through the channel filter and passing only signals having a power exceeding a predetermined level, Detecting / switching unit;
A gain control unit for adjusting the power of signals passed through the power detection / switching unit such that all of the signals passed through the power detection / switching unit have an average value of the signals passed through the power detection / switching unit;
A digital-to-analog converter for converting the power-adjusted signals into an analog signal by the gain control unit; And
An amplifier for amplifying the frequency-up-converted analog signal by the up-down converter after being converted by the digital-analog converter, and an analog signal amplified by the amplifier is transmitted through the transmission / reception antenna The wireless communication system.
delete A multi-signal relay method for communication between a base station and a user terminal,
(a) receiving signals from a base station;
(b) frequency downconverting the signals received in step (a);
(c) converting the frequency down-converted signals into digital signals in the step (b);
(d) passing only signals of a specific channel among the signals converted into digital signals in the step (c);
(e) detecting the power of the signals passed in the step (d), turning off signals having a power lower than a predetermined level among all of the passed signals, and passing only signals having a power exceeding a predetermined level ;
(f) adjusting power of signals passed in step (e) such that all of the signals passed in step (e) have an average value of signals passed in step (e);
(g) converting the power-adjusted signals into an analog signal in the step (f);
(h) frequency up-converting signals converted into an analog signal in step (g);
(i) amplifying the frequency up-converted signals in step (h); And
(j) transmitting the amplified signals in step (i).

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