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Reliability-based system polarization code puncturing method and system

A polar code and reliability technology, applied in the field of polar code coding, can solve the problem of inflexible code length of the system polar code, and achieve the effect of solving the inflexibility of the code length

Pending Publication Date: 2020-05-26
XIDIAN UNIV
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Problems solved by technology

[0006] The present invention provides a system polar code puncturing method and system based on reliability, which can solve the problem of inflexible code length of the system polar code without changing the basic structure of the polar code

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  • Reliability-based system polarization code puncturing method and system
  • Reliability-based system polarization code puncturing method and system
  • Reliability-based system polarization code puncturing method and system

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Embodiment 1

[0033] A reliability-based systematic polar code puncturing method includes:

[0034] Step 1: Based on the reliability measure, the reliability calculation is performed on the input sequence of the encoding end with a code length of N, and the reliability measure value of each channel is obtained. The reliability measure method used here is the Gaussian approximation method.

[0035] Step 2, perform code construction on the systematic polar code whose parent code is (8, 4): that is, assume that the code length after shortening is 6, and L=N-C=2; select the set index={7, 8}, first select The index index is used as the first part of the frozen bit set, and K sub-channels with high reliability are selected from the remaining 6 sub-channels as information bits, where the information bit set is {3, 4, 5, 6}; the last remaining The sub-channel {1, 2} is then used as the second part of the frozen bits. The first part and the second part of the frozen bits jointly constitute the fro...

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Abstract

The invention discloses a system polarization code puncturing method and system based on reliability. The method comprises the steps of performing reliability calculation on a system polarization codewith a code length of N; assuming that an L bit needs to be shortened, firstly selecting the last L sub-channel as a first part of a frozen bit, taking the K sub-channel with the highest reliabilitymetric value as an information bit from the remaining (N to L) sub-channels, and taking the remaining sub-channels as a second part of the frozen bit; performing bit inversion replacement on the indexvalue of the first part of the frozen bit to obtain a codeword end punching vector index s; encoding the system polarization code; deleting codeword bits at corresponding positions according to the punching vector index s; transmitting the punctured system polarization code through a Gaussian channel; initializing a log-likelihood ratio corresponding to the punching index vector s to be infiniteat a decoding end; and evaluating the puncturing method. According to the invention, the system polarization code can adapt to different code lengths on the premise of not changing the basic structureof the system polarization code.

Description

technical field [0001] The invention relates to the field of polar code coding, in particular to a reliability-based system polar code puncturing method and system. Background technique [0002] In recent years, the rapid increase of data traffic, the continuous emergence of various new services and scenarios, and the continuous increase of various connected devices have promoted the emergence and development of the fifth generation mobile communication (5G). Compared with 3G and 4G, the speed of 5G has been increased by dozens of times. At the same time, more advanced technologies have been introduced to build a network society with ultra-high-speed transmission requirements, ultra-high capacity, ultra-reliability, and ultra-short delay. Channel coding is one of the key technologies in the physical layer of mobile communication systems. 5G puts forward higher requirements for error correction codes, requiring better error correction capabilities and lower encoding and decod...

Claims

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Application Information

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IPC IPC(8): H03M13/29H04L1/00
CPCH03M13/29H04L1/0057
Inventor 郝书娟
Owner XIDIAN UNIV
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