Forward error correction method, device and decoder of convolutional code

Abstract

The invention provides a forward error correction method and apparatus of convolutional codes, and a decoder. The forward error correction method of convolutional codes includes the steps: extracting a sequence to be searched from convolutional code sequences, and according to the smooth penetrating characteristic according with the euler graph rule, of a generation matrix of convolutional codes, detecting whether the sequence to be searched can be accurately decoded; if so, decoding the sequence to be searched, utilizing the obtained decoding sequence to generate a positive deconvolution code sequence, and covering the convolutional codes corresponding to the convolutional code sequences interfered by noise; based on the strong convergence characteristic and the smooth penetrating characteristic of the convolutional code sequences, separating the subsequent interference sequence from the covered convolutional codes, and performing decoding processing; based on mathematical thought, using the second mechanism to decode the received convolutional codes in a decoding-first and error-correction-second mode, wherein the decoding speed is high and the accuracy is high; and starting the first mechanism in real time to promote the second mechanism to be maintained on a correct decoding path to effectively reduce the problem that the second mechanism enters the error path and reliably solve the threshold effect problem.

Description

technical field [0001] The invention relates to the technical field of communication decoding, and particularly designs a forward error correction method and device for high-speed anti-jamming convolutional codes. Background technique [0002] In the process of information transmission and processing, there are signal distortion and noise interference. How to obtain the original signal from signal distortion and noise pollution has always been a matter of great concern to the engineering and academic circles. Since the 1990s, in the field of information, mobile communications, deep space communications, satellite navigation, remote control, and remote sensing have developed rapidly. Relatively speaking, the closely related FEC (Forward Error Correction, Forward Error Correction) technology has been in the bottleneck state of technological development for a long time. [0003] FEC is a high-reliability communication technology. It is based on reliability coding theory and st...

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Problems solved by technology

[0007] In view of this, the purpose of the embodiments of the present invention is to provide a forward error correction method, device and decoder for convolutional codes, which is simple and effective for encoding processes with long constraint lengths and can reliably solve problems existing in existing decoders. Threshold effect problem

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