CN203242333U - LDPC code-based anti-interference voice signal transmission system - Google Patents
LDPC code-based anti-interference voice signal transmission system Download PDFInfo
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- CN203242333U CN203242333U CN 201320105483 CN201320105483U CN203242333U CN 203242333 U CN203242333 U CN 203242333U CN 201320105483 CN201320105483 CN 201320105483 CN 201320105483 U CN201320105483 U CN 201320105483U CN 203242333 U CN203242333 U CN 203242333U
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Abstract
The utility model relates to an LDPC code-based anti-interference voice signal transmission system. Voice signals are susceptible to interference in a strong interference environment in the prior art, and ineffective transmission is resulted. The transmission system includes a power module, an informaiton source module, an LDPC cyclic shift encoding module, a digital modulation and demodulation module, an LDPC data storage network decoding module, a denoise module, and a sink module. The transmission system can not only achieve accurate and efficient transmission for voice signals in strong interference environment, but also take the power effective transmission problem into account. The transmission system has the advantages of flexibility, accuracy, intelligence, simple structure and low cost.
Description
Technical field
The utility model belongs to electronic information technical field, particularly a kind of anti-interference transmitting voice signal system based on the LDPC code.
Background technology
Voice signal is the effective information that transmits in the voice communication system, and the voice signal of stronger noise in then can the severe jamming communication system seriously reduces the performance of voice communication system, destroys the quality of voice call.Therefore in the environment such as some strong noises, high electromagnetic interference (EMI), carry out normal, efficient voice communication, just more need some effectively digital communication technologies of anti-interference, noise reduction, extract available voice signal, realize reliable and effective voice communication.Therefore it is imperative to design a jamproof transmitting voice signal system for strong interference environment.
Summary of the invention
The utility model device has mainly solved the problem that voice signal is interfered and can not effectively transmits in the strong interference environment, and a kind of anti-interference transmitting voice signal system that utilizes efficient LDPC coding and decoding and Adaptive Signal Processing is provided.
The above-mentioned technical matters of the utility model device solves, the technical scheme that adopts is:
The utility model comprises power module, information source module, LDPC ring shift coding module, Digital Modulation and demodulation module, LDPC data storage network decoding module, denoising module, stay of two nights module.
Described power module is used for AC power is converted into the stable DC source, for system provide direct current+12V ,-8V ,+5V and-5V.
Described information source module process chip is TP3057, is used for input signal is carried out the information source coding.
Described LDPC loop coding module is used for signal is carried out the information source coding, and the redundancy of removing information reduces distorted signals, realizes reliable signal transmission.
Described digital modulation and demodulation module is used for signal spectrum to be moved, and realizes the transmission of baseband voice signals in channel.
Described LDPC data storage network decoding module is used for channel decoding, recovers original signal from the reception signal of distortion, realizes the accurate transmission of signal.
Described denoising module comprises FIR low-pass filter and Adaptive Noise Canceller, is used for the noise signal that system retains is carried out last filtering.
Described stay of two nights module is loudspeaker, is used for exporting accurately voice signal.
The utility model not only can be realized accurate, the high efficiency of transmission of strong interference environment voice signal, and takes into account the effective transmission problem of power.Have dirigibility, accuracy and intellectuality, simple in structure, low cost and other advantages.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment have more than for the restriction the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection domain of the present utility model in.
A kind of anti-interference transmitting voice signal system based on the LDPC code that the utility model embodiment provides is comprised of power module 1, information source module 2, LDPC ring shift coding module 3, Digital Modulation and demodulation module 4, LDPC data storage network code translator 5, denoising module 6, stay of two nights module 7.
Described power module is used for AC power is converted into the stable DC source, for system provide direct current+12V ,-8V ,+5V and-5V.Described information source module process chip is TP3057, is used for input signal is carried out the information source coding.Described LDPC loop coding module is used for signal is carried out the information source coding, and the redundancy of removing information reduces distorted signals, realizes reliable signal transmission.Described digital modulation and demodulation module is used for signal spectrum to be moved, and realizes the transmission of baseband voice signals in channel.Described LDPC data storage network decoding module is used for channel decoding, recovers original signal from the reception signal of distortion, realizes the accurate transmission of signal.Described denoising module comprises FIR low-pass filter and Adaptive Noise Canceller, is used for the noise signal that system retains is carried out last filtering.Described stay of two nights module is loudspeaker, is used for exporting accurately voice signal.
The course of work of present embodiment is: plugged, communication system is opened, voice signal carries out the information source coding through information source module, then carry out chnnel coding and synchronously processing through the LDPC coding module, enter Digital Modulation and demodulation module and carry out transmission, from receive signal, recover original signal through LDPC data storage network decoding module again, and then by the denoising module noise is carried out last filtering, export finally by stay of two nights module.
The utility model adopts LDPC coding and decoding and Adaptive Signal Processing technology, the characteristics such as have dirigibility, anti-interference, noise reduction and economize on resources.Can be applicable to the environment such as strong noise, high electromagnetic interference (EMI).
Claims (1)
1. the anti-interference transmitting voice signal system based on the LDPC code is characterized in that: comprise power module, information source module, LDPC ring shift coding module, Digital Modulation and demodulation module, LDPC data storage network decoding module, denoising module, stay of two nights module;
Described power module is used for AC power is converted into the stable DC source, for system provide direct current+12V ,-8V ,+5V and-5V;
Described information source module process chip is TP3057, is used for input signal is carried out the information source coding;
Described LDPC loop coding module is used for signal is carried out the information source coding, and the redundancy of removing information reduces distorted signals, realizes reliable signal transmission;
Described digital modulation and demodulation module is used for signal spectrum to be moved, and realizes the transmission of baseband voice signals in channel;
Described LDPC data storage network decoding module is used for channel decoding, recovers original signal from the reception signal of distortion, realizes the accurate transmission of signal;
Described denoising module comprises FIR low-pass filter and Adaptive Noise Canceller, is used for the noise signal that system retains is carried out last filtering;
Described stay of two nights module is loudspeaker, is used for exporting accurately voice signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320105483 CN203242333U (en) | 2013-03-08 | 2013-03-08 | LDPC code-based anti-interference voice signal transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320105483 CN203242333U (en) | 2013-03-08 | 2013-03-08 | LDPC code-based anti-interference voice signal transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203242333U true CN203242333U (en) | 2013-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320105483 Expired - Fee Related CN203242333U (en) | 2013-03-08 | 2013-03-08 | LDPC code-based anti-interference voice signal transmission system |
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| CN (1) | CN203242333U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105513599A (en) * | 2015-11-24 | 2016-04-20 | 西安烽火电子科技有限责任公司 | Unequal-protection-based rate adaptive acoustic code communication method |
-
2013
- 2013-03-08 CN CN 201320105483 patent/CN203242333U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105513599A (en) * | 2015-11-24 | 2016-04-20 | 西安烽火电子科技有限责任公司 | Unequal-protection-based rate adaptive acoustic code communication method |
| CN105513599B (en) * | 2015-11-24 | 2019-05-21 | 西安烽火电子科技有限责任公司 | A kind of rate adaptation acoustic code communication means protected again based on non-grade |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20140308 |