Method for coding and decoding at frame level on the basis of feedback mechanism

Abstract

The invention belongs to a method for channel coding and decoding, based on the information transmission technology in the field of communication. The method comprises the following steps conducted by a transmitting terminal: framing, framing handling, frame coding processing and transmitting, adding frame identification numbers, and signal processing and transmitting; and the method further comprises the following steps conducted by a receiving terminal: receiving the signal, processing the normal signal, detecting the frame, decoding and sending the system frame to the system sink. By coding only the frames with errors at the transmitting terminal, the invention greatly reduces the number of the coded frames, and the complexity of coding and decoding; by further coding the frame according to the receiving condition fed back from the receiving terminal on the basis of the feedback mechanism, the invention improves the efficiency of transmission; the receiving terminal is capable of recovering the frame with errors by using the simple decoding method, so that the invention effectively increases the transmission capacity; and the invention also improves the error-correcting capability for the frames with errors in a large number are allowed in decoding, and the frames with errors are not required to be successive. Accordingly, the invention has the characteristics of low complexity in coding and decoding and high error-correcting capability; and the system has the characteristics of high transmission capacity, high transmission efficiency and high reliability.

Description

technical field [0001] The invention belongs to the data (information) transmission technology in the communication field, in particular to a frame-level coding and decoding method based on a feedback mode in the channel coding and decoding method for reducing the channel transmission error rate. 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 pa...

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.