Method and device for turbo decoding

A technology of decoding and decoding modules, which is applied in the field of turbo decoding, can solve the problems of low decoding speed and achieve the effects of solving long time, increasing speed, and shortening decoding delay

Active Publication Date: 2016-11-23
SANECHIPS TECH CO LTD
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  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a method and device for turbo decoding, to at least solve the above-mentioned problem in the related art that the decoding speed is not high due to recursive calculation of intermediate variables respectively

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  • Method and device for turbo decoding

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Embodiment Construction

[0030] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0031] figure 1 is the basic schematic diagram of turbo decoding, such as figure 1 As shown, the prior information (x k ) and parity bit 1 (y 1k ) into the decoding module 1 (DEC1), for the decoding method using long-MAP or MAX-long-MAP algorithm, DEC1 performs MAP1 calculation on the input code block to be decoded, and then inputs the result to the interleaving After the module is interleaved, it is input to the decoding module 2 (DEC2) and the input parity bit 2 (y 2k ) to perform MAP2 calculation together, and the result is output by the deinterleaving module or input to the decoding module 1 as a priori information.

[0032] figure 2 It is a schematic diagram of the hardware architecture o...

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Abstract

The present invention provides a turbo decoding method and device, wherein, in each iteration of multi-path parallel decoding of a code block to be decoded, the method includes: , the decoding module obtains all the first intermediate variables of the current path by recursively from front to back, and obtains all the second intermediate variables of the current path by recursively from back to front; the decoding module obtains all the first intermediate variables according to Intermediate variables, all second intermediate variables, and all branch transfer metrics of the module to be decoded are used to obtain all LLRs of the current path; the decoding module obtains the prior information and decoding information output by the current path according to all logarithmic likelihood ratios code result. Through the present invention, in each parallel decoding module, two intermediate variables are recursively calculated from the front to the back and from the back to the front at the same time, which solves the time delay of each iteration in the existing parallel decoding method. Long problems, thus greatly shortening the decoding delay and improving the decoding speed.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a turbo decoding method and device. Background technique [0002] Since the Turbo code was proposed in 1993, due to its excellent performance close to the Shannon limit, it has been widely used in wireless communication systems, and has been identified as the third generation partnership project (Third Generation Partnership Project, referred to as 3GPP) mobile communication system. One of the channel coding schemes. In a Long Term Evolution (LTE for short) system, a higher transmission rate and better bit error performance are required, and requirements for channel coding and decoding are correspondingly increased. However, due to the limitations of the Turbo code iterative decoding algorithm, there are still many difficulties in its specific realization, among which the most important is the decoding speed. Therefore, reducing the decoding complexity and decoding delay has ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/27
CPCH03M13/2978H03M13/3972H03M13/6525H03M13/6583
Inventor 杜金周
Owner SANECHIPS TECH CO LTD
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