CN106067846A - A kind of adaptive error correction coding changing method of preset multichannel input - Google Patents
A kind of adaptive error correction coding changing method of preset multichannel input Download PDFInfo
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- CN106067846A CN106067846A CN201610595462.1A CN201610595462A CN106067846A CN 106067846 A CN106067846 A CN 106067846A CN 201610595462 A CN201610595462 A CN 201610595462A CN 106067846 A CN106067846 A CN 106067846A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0059—Convolutional codes
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Error Detection And Correction (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The invention discloses a kind of adaptive error correction coding method.Particularly relate to, for when complicated signal to noise ratio channel communication, automatically switch to be suitable for the Error Correction of Coding mode of current signal, improving efficiency of transmission, and effectively control error rate level.Including: sender's acquiescence first uses the coded system of low code efficiency high error correcting capability to initiate to transmit both sides' given data frame.Input signal is divided into four tunnels by recipient, gives different rates demodulator and is demodulated, and so only has a road can obtain data-frame sync head and the frame data of un-encoded after correctly demodulating.Then frame data are divided into four tunnels and give the decoder of different Error Correction of Coding mode, equally, only will be correctly decoded by a circuit-switched data, draw final data.Final data is after decoding, it will the statistics bit error rate, and feeds back to sender.Sender will switch transmission means according to current error code situation.
Description
Technical field
The present invention relates to a kind of adaptive error correction coding method.Particularly relate to for the signal to noise ratio in complicated lasting change
During channel communication, automatically switching to be suitable for the Error Correction of Coding mode of current signal, improving efficiency of transmission, and effectively control is by mistake
Code check level.
Background technology
Current communication environment becomes increasingly complex, and synchronous signal experienced interference form when being wirelessly transferred gets more and more.For
Make system obtain higher communication code efficiency and can effectively control error rate level, the present invention devise a kind of judge current
Channel circumstance, automatically selects the technology of corresponding Error Correction of Coding mode.
Traditional communication Error Correction of Coding mode is more fixing, just has determined that Error Correction of Coding mode when system designs.
But in actual applications, channel circumstance is not unalterable.Most of data communication systems are that use is a kind of fixing
Channel coding, this channel coding design can process the worst expected bit error rate, but then can be complete when the bit error rate is further worsened
Full-time time.Or when running into the preferable bit error rate, cause code efficiency relatively low due to not mating of error correcting capability.
The method being currently used for communication Error Correction of Coding mainly has: 1. automatic request for repetition, this method advantage is system
Design difficulty is low, simple in construction, but real-time is poor.2. forward error correction, this method does not needs feedback channel, but for
The limited error recovery capability of the communication channel of complicated change.Therefore, when Communication System Design, it is necessary to one may determine that currently
Channel circumstance, automatically switches to be suitable for the Optimal Error-correcting mode of present channel.
Content of the invention
It is an object of the invention to provide a kind of adaptive error correction coding technology.
The technical solution realizing the object of the invention is:
The preset different error correction efficiency codec of four kinds of different rates adapting to different signal to noise ratio of transceiver communication both sides.Transmitting-receiving
Both sides make full use of error correction coding/decoding efficiency and ability, and the preset four kinds of different rates that can adapt to big signal to noise ratio change channel are not
With error correction efficiency codec, wherein the RS under low rate and convolutional coded system add intertexture and can preferably tackle poor
The transmission of more how long burst error under channel circumstance.RS under two-forty and convolutional coded system can preferably be tackled relatively
Transmission under inferior channel environment.The channel that RS under two-forty and convolutional coded system can tackle general signal to noise ratio passes
Defeated.RS coding under two-forty can tackle the preferable transmission of signal to noise ratio.
Initiator's acquiescence of communication during communication initiates communication with the coded system of the highest error correcting capability of ground code efficiency, transmits
Both sides' given data frame.Recipient uses the corresponding four road parallel demodulation decoders with sender, and receipt signal is divided four tunnels connect
Receive, use the demodulation mode demodulation of different rates, it is achieved blind demodulating and decoding, at this moment only one tunnel can correct demodulating and decoding, must
To correct Frame.Finally, the Frame of acquisition is carried out Bit Error Ratio Measurement by recipient, and is fed back to sender.?
The initiator of rear communication can gradually switch to the optimum error correction adapting to present channel environment to compile by the analysis to current error rate
Code mode and transfer rate.
Brief description
Four kinds of patterns of Fig. 1 self adaptation switching.
The flow chart of Fig. 2 self adaptation switching coded system one.
Detailed description of the invention
As it is shown in figure 1, the codec of the different error correction efficiency of four kinds of different rates of system intialization, to adapt to different noise
The transmission demand of ratio.Code efficiency uprises successively from top to bottom, and error correcting capability reduces successively.RS coding convolution under low rate is compiled
The combined coding of code adds interleaving mode, and under two-forty, the combined coding of RS coding convolutional encoding adds interleaving mode, RS under two-forty
Coding convolutional encoding combined coding without interleaving mode, RS coded system under two-forty.Wherein the RS under low rate and convolution join
Close coded system to add to interweave and can preferably tackle under poor channel environment the transmission of more how long burst error.RS under two-forty
Can preferably tackle the transmission under poor channel environment with convolutional coded system.RS under two-forty and convolutional are compiled
Code mode can tackle the transmission of general signal to noise ratio.RS coding under two-forty can be tackled the preferable channel of signal to noise ratio and be passed
Defeated.
Detailed description of the invention is as in figure 2 it is shown, the initiator of communication gives tacit consent to the coding with the highest error correcting capability of ground code efficiency
Mode initiates communication, transmits both sides' given data frame.Input signal is divided into four tunnels by recipient, gives corresponding with sender four
Road parallel demodulators, uses the demodulation mode of different rates to be demodulated.Identified by packet header and achieve blind demodulating and decoding, complete
With the real-time matching of sender's modulation rate and coded system, the data before being decoded.Then data are divided into three tunnels to give
Decoder, equally, only one circuit-switched data will be correctly decoded, and draws final data.Final data is after decoding, it will system
The meter bit error rate, and feed back to sender.The initiator of communication can switch to adapt to currently by the analysis to current error rate
The Optimal Error-correcting mode of channel circumstance and transfer rate.The reduction of the bit error rate that the transmission of communication can obtain according to feedback,
Gradually improving transfer rate, then the mode that gradually alternates coding, the mode being added intertexture from the combined coding of RS convolution becomes RS and volume
Long-pending combined coding does not adds the mode of intertexture, if error condition is still preferable, then switches to RS coded system again.
Claims (3)
1. the adaptive error correction coding changing method of a preset multichannel input, it is characterised in that comprise the following steps:
Step 1: the preset different error correction efficiency codec of four kinds of different rates adapting to different signal to noise ratio of receiving-transmitting sides；
Step 2: sender's acquiescence first uses the coded system of low code efficiency high error correcting capability to initiate to transmit both sides' given data
Frame；
Step 3: recipient uses corresponding to sender four road parallel demodulation decoder demodulating and decoding simultaneously, it is achieved blind solution is reconciled
Code, only one tunnel can be completely corresponding with sender, and obtains correct data frame；
Step 4: recipient will obtain Frame and carry out Bit Error Ratio Measurement, and feed back to sender；
Step 5: sender will switch transmission means according to current error code situation, the encoding and decoding optimum to reach present channel
And transfer rate.
2. the adaptive error correction coding changing method of a preset multichannel according to claim 1 input, it is characterised in that
Described step 1 includes: receiving-transmitting sides makes full use of error correction coding/decoding efficiency and ability, preset can adapt to big signal to noise ratio change letter
The different error correction efficiency codec of four kinds of different rates in road, wherein the RS under low rate and convolutional coded system add intertexture
Can preferably tackle under poor channel environment the transmission of more how long burst error；RS under two-forty and convolutional coding staff
Formula can preferably tackle the transmission under poor channel environment；RS under two-forty and convolutional coded system can tackle one
As the transmission of signal to noise ratio；RS coding under two-forty can tackle the preferable transmission of signal to noise ratio.
3. the adaptive error correction coding changing method of a preset multichannel according to claim 1 input, it is characterised in that
Described step 2 includes: recipient uses parallel demodulation decoder to demodulate simultaneously, is identified that by packet header achieving blind solution reconciles
Code, completes the real-time matching with sender's modulation rate and coded system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610595462.1A CN106067846A (en) | 2016-07-26 | 2016-07-26 | A kind of adaptive error correction coding changing method of preset multichannel input |
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| CN201610595462.1A CN106067846A (en) | 2016-07-26 | 2016-07-26 | A kind of adaptive error correction coding changing method of preset multichannel input |
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| CN106067846A true CN106067846A (en) | 2016-11-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181568A (en) * | 2017-05-16 | 2017-09-19 | 中山大学花都产业科技研究院 | A kind of low-power consumption wide area network spread spectrum communication system channel coded system and method |
| CN114826482A (en) * | 2022-03-22 | 2022-07-29 | 河南中多科技发展有限公司 | Self-adaptive method for through-the-earth data transmission rate |
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| CN101494469A (en) * | 2008-01-23 | 2009-07-29 | 大唐移动通信设备有限公司 | Method and apparatus for determining modulation mode of communication system |
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| CN114826482B (en) * | 2022-03-22 | 2024-03-26 | 河南中多科技发展有限公司 | self-adaptive method for through-the-earth data transmission rate |
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