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Ordering method applicable to polar code decoding path split

A sorting method and polar code technology, applied in the field of communication, can solve the problem of high decoding delay and complexity, and achieve the effect of reducing the sorting delay and the number of comparisons, and reducing the overall delay

Active Publication Date: 2018-04-10
上海瀚芯实业发展合伙企业(有限合伙)
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Problems solved by technology

The SCL decoding method needs to be sorted every time a bit is decoded, and a large number of sorting operations lead to high decoding delay and complexity

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  • Ordering method applicable to polar code decoding path split
  • Ordering method applicable to polar code decoding path split
  • Ordering method applicable to polar code decoding path split

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Embodiment Construction

[0034] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0035] The sorting method of the present invention is applicable to a polar code decoding method based on a serial cancellation list (SCL). The brief process of SCL decoding is as follows:

[0036] The SCL decoding of polar codes can be represented by a tree decoding structure. For a polar code with a code length of N and an information bit length of K, the decoding tree has a depth of n=log 2 A binary tree of N. figure 1 A decoding tree example with N=8 and K=4 is given, the white leaf nodes in the figure represent dormant bits, and the black leaf nodes represent information bits. The SCL method traverses the entire decoding tree recursively from the root node...

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Abstract

The invention provides an ordering method applicable to polar code decoding path split. The method comprises the steps of expressing PM (Path Metric) values of to-be-ordered paths through utilizationof vectors; interposing the paths in parallel; ordering elements in each gap in parallel; and outputting L paths with the minimum PM values. According to the method, in an ordering process after polarcode decoding paths are split, through utilization of the feature that original paths in a list are ordered, parallel dichotomy interposition ordering is carried out on the newly generated L paths and then the paths interposed at the same position are ordered. The average number of the paths interposed at each position is relatively low and the paths at each position can be ordered in parallel, so the ordering time delay and comparison times required in decoding based on successive cancellation can be clearly reduced, and moreover, the integrated time delay of the polar code decoding also canbe reduced.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a channel coding and decoding technology in a system, and more specifically, relates to a low-time-delay and low-complexity path sorting improvement method in polar code decoding based on a serial cancellation list. Background technique [0002] Polar code is a new type of coding method. It is currently the only channel coding technology that can theoretically prove that it can reach the Shannon limit under binary discrete memoryless channels, and has practical linear complexity coding and decoding capabilities. It has become the fifth generation communication system ( A strong candidate for channel coding schemes in 5G). Serial cancellation (SC, Successive Cancellation) decoding is a low-complexity decoding method. The serial cancellation list (SCL, Successive Cancellation List) decoding method is an improved method of the serial cancellation decoding method, and can achiev...

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Application Information

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IPC IPC(8): H04L1/00
CPCH04L1/0052H04L1/0057
Inventor 潘志文徐庆云刘楠尤肖虎
Owner 上海瀚芯实业发展合伙企业(有限合伙)
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