Speed-free mode-based frame level encoding and decoding method

Abstract

The invention belongs to a speed-free mode-based frame level encoding and decoding method in the technical field of communications, which comprises the following steps: framing, frame processing, frame encoding and transmitting, addition of a frame identification number, and signal processing and transmitting at a transmitting end, and signal receiving and conventional signal processing, frame detecting, decoding and sending a system frame into a sink at a receiving end. Because main operation of the receiving end is performed on an error frame, the error frame can be recovered by a simple decoding method, and the transmission capacity of the system is effectively improved. However, due to the adoption of the speed-free code technology, the receiving end unnecessarily feeds back any otherinformation to the transmitting end except sending a termination signal when the receiving is finished; the encoding permits a lot of error frames to participate; the error frames are not required tobe continuous; and the error correcting capability is improved. Therefore, the speed-free mode-based frame level encoding and decoding method has the characteristics of low encoding and decoding complexity, strong error correcting capability, extremely less feedback information required, low requirement on the bandwidth of a feedback link, high transmission capacity of the system, high transmission efficiency and reliability, and the like.

Description

technical field [0001] The invention belongs to the data (information) transmission technology in the field of communication, in particular to a frame-level coding and decoding method in a rateless mode for reducing the error rate of channel transmission. Background technique [0002] With the development of communication technology, the requirements for transmission capacity and distance are also increasing. In data communication, signals often generate errors due to noise, fading or other reasons. In order to ensure communication quality and efficiency, these errors must be controlled and corrected. The common error control technology mainly includes forward error correction (FEC ) and feedback retransmission (ARQ) and other technologies. Forward error correction is a very effective method. Common forward error correction codes, namely channel coding, include Reed-Solomon codes, convolutional codes, turbo codes, and low-density parity-check codes ( LDPC) etc. Forward er...

AI Technical Summary

Problems solved by technology

However, the prerequisites for using frame merging technology are: first, the number of wrong bits should not be too many, otherwise the complexity of poor search will be too high, or error detection may fail due to exceeding the error detection range of the frame detection sequence; The error bits of the frame cannot be located at the same position, otherwise there will be missed detection, and the error bits cannot be found, so the original information frame cannot be recovered; thirdly, this technology only works when a continuity error occurs during frame transmission. efficient

Therefore, this technology has disadvantages such as poor efficiency in reducing channel transmission error rate, improving transmission reliability and capacity, and narrow application range.