CN206181008U - Receiver is reported an emergency and asked for help or increased vigilance in navigation of signal intensity adjustable low noise binary channels - Google Patents
Receiver is reported an emergency and asked for help or increased vigilance in navigation of signal intensity adjustable low noise binary channels Download PDFInfo
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- CN206181008U CN206181008U CN201621129834.3U CN201621129834U CN206181008U CN 206181008 U CN206181008 U CN 206181008U CN 201621129834 U CN201621129834 U CN 201621129834U CN 206181008 U CN206181008 U CN 206181008U
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Abstract
The utility model relates to a receiver is reported an emergency and asked for help or increased vigilance in navigation of signal intensity adjustable low noise binary channels, by radio -frequency antenna receive radio frequency signal, the signal at first carries out big signal through the clipper -limiter to the signal and carries out the amplitude limiting, then carry out signal tentatively enlarged through low -noise amplifier the interfering signal suppression back of high frequency through low pass filter, then adjust the power of signal through the adjustable attenuator, attenuate big signal and guarantee the receiver and can normally receive under the condition of big signal, then the signal divides the ware to divide into two the tunnel with the signal through the merit, be used for receiving english signal all the way, be used for receiving chinese signal all the way, two way signals become intermediate frequency signal commonly used through the first detector with signal frequency respectively, intermediate frequency filtering with amplify after get into the digital process part, the beneficial effects are that the interference killing feature is good, system sensitivity is higher and have higher dynamic.
Description
Technical field
The utility model is related to a kind of binary channels navigation warning receiver, more particularly to a kind of adjustable low noise of signal intensity
Sound binary channels navigates by water warning receiver.
Background technology
Navigation warning signal receiver (abbreviation NAVTEX receivers) is to be engaged in sea transport ship and ocean job that requires special skills ship
One of GMDSS equipment that must be equipped with.Existing more than 50 country in the whole world establishes NAVTEX systems, and China is in Shanghai, wide
State, Dalian, Foochow, Sanya have been built and have broadcast platform, and signal covers the marine site within 400 nautical miles of China coast.NAVTEX systems
It is international frequency 518KHz in the groundwork frequency of China, language is English, domestic working frequency 486KHz/
4209.5KHz, language is Chinese.
Because NAVTEX system operating frequencies are relatively low, general receiver is in radio frequency link design generally using the side directly put
Formula is received.But the 1/f noise existed in active device increases with the reduction of frequency, the noise in low-frequency range is caused
Disturb larger, sensitivity decrease, and directly electric discharge road is without frequency conversion, it is not strong to suppress interference performance, at the same many receivers by
Cannot the larger signal of receives frequency in receiving power control is lacked.
The content of the invention
In view of the problem that prior art is present, a kind of binary channels navigation warning receiver of the utility model offer, solve
Influence of the 1/f noise caused because frequency is relatively low in straight electric discharge road to signal to noise ratio, and suppress interference after frequency conversion
Ability enhancing, enabling a receiver to also being capable of normal work, particular technique when the nearlyer receiving power of range transmission tower is larger
Scheme is that a kind of adjustable low noise binary channels of signal intensity navigates by water warning receiver, including radio-frequency antenna, limiter, low pass
Wave filter, low-noise amplifier, adjustable attenuator, one-to-two power splitter, frequency mixer, intermediate-frequency filter, amplifier, its feature exist
In：After radiofrequency signal is received through antenna, first by the amplitude of limiter control input signal, reducing strong signal causes amplifier
It is non-linear, high-frequency interferencing signal is filtered by low pass filter then, filtered signal is relatively low by noise coefficient
Adjustable attenuator is connected after low-noise amplifier, signal is carried out into the normal work that power adjusting ensures rear class, then signal enters
Enter one-to-two power splitter, radiofrequency signal is divided into two-way, all the way for receiving English signal, all the way for receiving Chinese signal,
Signal after work(point initially enters frequency mixer, up-conversion is carried out to signal and then is filtered through intermediate-frequency filter, then through putting
Numerical portion is accessed after big device to be demodulated.
The beneficial effects of the utility model are good antijamming capabilities, and system sensitivity is higher, are not only able to receive small-signal
And big signal can be normally received.
Brief description of the drawings
Fig. 1 is circuit connection block diagram of the present utility model.
Specific embodiment
As shown in figure 1, a kind of low noise binary channels navigation warning receiver, including radio-frequency antenna, limiter, LPF
Device, low-noise amplifier, adjustable attenuator, power splitter, frequency mixer, intermediate-frequency filter, amplifier, wherein, radio-frequency antenna, amplitude limit
Device, low pass filter, low-noise amplifier, adjustable attenuator, one-to-two power splitter are sequentially connected, and divide after one-to-two power splitter
Constituted for two-way is respectively sequentially connected by frequency mixer, intermediate-frequency filter, amplifier, the signal received by antenna first have to by
Limiter carries out amplitude limit to prevent the larger signal or interference signal from influenceing the normal work of low noise amplifier, after limiter
The low pass filter that connection is made up of lc circuit, rejection frequency interference signal higher, because first order amplifier is to link
Noise coefficient influence is very big, therefore filtered signal will be amplified by low noise amplifier, and noise is reduced while amplification
Generation, signal after amplification passes through the adjustable attenuator controlled by control circuit carries out adjustable attenuation to signal power, if
The signal intensity that receiver range transmission tower is received when nearer then needs to increase signal attenuation degree greatly, receiver distance hair
Attenuation can be reduced when penetrating tower farther out or do not decayed, then signal is divided into two-way by signal by power splitter, all the way
It is international NAVTEX signals, another road is the Chinese NAVTEX signals that working language is Chinese, and two paths of signals leads to respectively
Cross frequency mixer to be mixed, it is the intermediate-freuqncy signal of 10.7MHz to produce frequency, by being incited somebody to action after the Special middle frequency wave filter of 10.7MHz
Signal amplifies, it is ensured that numerical portion can normally be received and processed.Because the relatively low straight electric discharge road of NAVTEX signal frequencies does not have
Special wave filter is filtered, and interference signal is stronger, and 10.7MHz is conventional intermediate-freuqncy signal, using special wave filter,
Filtering performance preferably, enhances the ability for suppressing interference, and introduces numerical-control attenuator, can be by controlling circuit strong to signal
Degree is controlled, and enhances the dynamic range of receiver signal strength.
Claims (1)
1. a kind of adjustable low noise binary channels of signal intensity navigates by water warning receiver, including radio-frequency antenna, limiter, low pass filtered
Ripple device, low-noise amplifier, adjustable attenuator, one-to-two power splitter, frequency mixer, intermediate-frequency filter, amplifier, its feature exist
In：Radio-frequency antenna, limiter, low pass filter, low-noise amplifier, adjustable attenuator, power splitter are unidirectionally connected successively, through one
It is divided into two-way after point two power splitters respectively unidirectionally to be connected successively by frequency mixer, intermediate-frequency filter, amplifier, radio-frequency antenna reception radio frequency
Signal, signal carries out big signal and carries out amplitude limit by limiter to signal first, then the doing high frequency by low pass filter
Disturb after signal suppresses and tentatively amplified signal by low-noise amplifier, then by adjustable attenuator to the power of signal
It is adjusted, big signal is carried out into decay ensures that receiver can be normally received in the case of big signal, and then signal passes through
Signal is divided into two-way by one-to-two power splitter, all the way for receiving English signal, all the way for receiving Chinese signal, two paths of signals
Pass through mixing, intermediate frequency filtering respectively and be amplified into digital processing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621129834.3U CN206181008U (en) | 2016-10-17 | 2016-10-17 | Receiver is reported an emergency and asked for help or increased vigilance in navigation of signal intensity adjustable low noise binary channels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621129834.3U CN206181008U (en) | 2016-10-17 | 2016-10-17 | Receiver is reported an emergency and asked for help or increased vigilance in navigation of signal intensity adjustable low noise binary channels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206181008U true CN206181008U (en) | 2017-05-17 |
Family
ID=58678697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621129834.3U Expired - Fee Related CN206181008U (en) | 2016-10-17 | 2016-10-17 | Receiver is reported an emergency and asked for help or increased vigilance in navigation of signal intensity adjustable low noise binary channels |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206181008U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911134A (en) * | 2017-06-21 | 2018-04-13 | 天津光电通信技术有限公司 | The plate card type receiver that a kind of set AIS and ACARS signals are received |
| CN108847866A (en) * | 2018-08-24 | 2018-11-20 | 京信通信系统（中国）有限公司 | Radio-frequency front-end monkey chatter suppression circuit and WLAN access device |
| CN108923805A (en) * | 2018-06-21 | 2018-11-30 | 南京仁德电子产品研发有限公司 | A kind of anti-interference navigation warning signal receiver system |
| CN109286422A (en) * | 2018-11-15 | 2019-01-29 | 锐捷网络股份有限公司 | A kind of method of intelligence separating device and the noise coefficient for adjusting radio frequency link |
| CN110224770A (en) * | 2019-06-15 | 2019-09-10 | 南京巴乌克智能科技有限公司 | A kind of method and apparatus improving wireless device receiving sensitivity |
| CN111030714A (en) * | 2019-11-24 | 2020-04-17 | 扬州海科电子科技有限公司 | High-speed anti-blocking receiver device and receiving method |
| CN112564723A (en) * | 2020-11-06 | 2021-03-26 | 北京遥测技术研究所 | Miniaturized low-cost high-dynamic-range receiving and amplifying assembly |
| CN114039611A (en) * | 2021-11-08 | 2022-02-11 | 成都天奥信息科技有限公司 | Novel civil aviation airborne double-channel very high frequency receiver and communication system |
| CN115296757A (en) * | 2022-10-09 | 2022-11-04 | 天津讯联科技有限公司 | Anti-occlusion system and method for joint judgment of received signal strength and signal-to-noise ratio |
-
2016
- 2016-10-17 CN CN201621129834.3U patent/CN206181008U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911134A (en) * | 2017-06-21 | 2018-04-13 | 天津光电通信技术有限公司 | The plate card type receiver that a kind of set AIS and ACARS signals are received |
| CN108923805A (en) * | 2018-06-21 | 2018-11-30 | 南京仁德电子产品研发有限公司 | A kind of anti-interference navigation warning signal receiver system |
| CN108847866A (en) * | 2018-08-24 | 2018-11-20 | 京信通信系统（中国）有限公司 | Radio-frequency front-end monkey chatter suppression circuit and WLAN access device |
| CN109286422A (en) * | 2018-11-15 | 2019-01-29 | 锐捷网络股份有限公司 | A kind of method of intelligence separating device and the noise coefficient for adjusting radio frequency link |
| CN110224770A (en) * | 2019-06-15 | 2019-09-10 | 南京巴乌克智能科技有限公司 | A kind of method and apparatus improving wireless device receiving sensitivity |
| CN111030714A (en) * | 2019-11-24 | 2020-04-17 | 扬州海科电子科技有限公司 | High-speed anti-blocking receiver device and receiving method |
| CN111030714B (en) * | 2019-11-24 | 2022-02-18 | 扬州海科电子科技有限公司 | High-speed anti-blocking receiver device and receiving method |
| CN112564723A (en) * | 2020-11-06 | 2021-03-26 | 北京遥测技术研究所 | Miniaturized low-cost high-dynamic-range receiving and amplifying assembly |
| CN114039611A (en) * | 2021-11-08 | 2022-02-11 | 成都天奥信息科技有限公司 | Novel civil aviation airborne double-channel very high frequency receiver and communication system |
| CN115296757A (en) * | 2022-10-09 | 2022-11-04 | 天津讯联科技有限公司 | Anti-occlusion system and method for joint judgment of received signal strength and signal-to-noise ratio |
| CN115296757B (en) * | 2022-10-09 | 2022-12-20 | 天津讯联科技有限公司 | Anti-occlusion system and method for joint judgment of received signal strength and signal-to-noise ratio |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170517 Termination date: 20181017 |