Encoding and decoding method for improving decoding efficiency by pilot frequency information and device thereof

Abstract

The invention discloses an encoding and decoding method for improving decoding efficiency by pilot frequency information and a device thereof. The method comprises the following steps that: pilot frequency sequences are evenly inserted into an information sequence before encoding, and the information sequence is subjected to error correction encoding by an error correcting code; the encoded information sequence is generated into an OFDMA symbol after IFFT conversion, and is transmitted to a receiving end; the receiving end carries out FFT conversion on the received information sequence to obtain soft information corresponding to the information sequence which is encoded by a transmitting end; the positions of the pilot frequency sequences inserted into the information sequence are set into corresponding soft information values according to values of the pilot frequency sequences; and the information is subjected to error correcting decoding to obtain transmitting information of the transmitting end. The method and the device can improve the velocity of convergence and decoding performance of an error correcting decoder, reduce the times of decoding iteration, reduce decoding time delay, and simplify the process of decoding.

Description

technical field [0001] The present invention relates to a coding method and a device thereof. Background technique [0002] In wireless communication systems, in order to improve the reliability of transmission and meet the needs of high-speed data services, error-correcting codes such as Turbo and LDPC codes that can obtain high coding gain through iterative decoding are usually selected. However, due to the high decoding complexity and the large number of iterations (LDPC codes generally have 20 to 50 iterations), the resulting time delay is a major factor restricting its development. [0003] In the decoding process of error-correcting codes, if there is known information, by changing the soft information value corresponding to the known information, the convergence of decoding can be effectively improved (it can effectively reduce the number of iterations in decoding) and the decoding If the performance of the code is simply added to the information before encoding, the...

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Problems solved by technology

However, due to the high decoding complexity and the large number of iterations (LDPC codes generally range from 20 to 50 iterations), the resulting time delay is a major factor restricting its development.

[0003] In the decoding process of error-correcting codes, if there is known information, by changing the soft information value corresponding to the known information, the convergence of decoding can be effectively improved (it can effectively reduce the number of iterations in decoding) and the decoding If the performance of the code is simply added to the information before encoding, the efficiency of the encoding will be reduced

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