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Low-complexity polarization code SC decoding method based on aggregation structure

A decoding and code length technology, applied in the direction of using linear codes for error correction/detection, using block codes for error correction/detection, digital transmission systems, etc., can solve problems such as increasing the complexity of decoder implementation, and achieve decoding The code performance is basically lossless, the requirements for node reliability are reduced, and the effect of reducing the complexity of implementation

Active Publication Date: 2022-01-21
BEIHANG UNIV
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  • Description
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Problems solved by technology

This process introduces an additional comparison operation, which increases the complexity of the decoder implementation

Method used

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  • Low-complexity polarization code SC decoding method based on aggregation structure
  • Low-complexity polarization code SC decoding method based on aggregation structure
  • Low-complexity polarization code SC decoding method based on aggregation structure

Examples

Experimental program
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Embodiment

[0080] Build a simulation framework based on MATLAB, define the code length N=1024 bits, and the information bits are 512 bits respectively. The signal-to-noise ratio ranges from 3 to 5dB. The frozen set sequence is determined according to the 5G control channel polarization coding sequence list provided by 3GPP. Statistical frame error rate indicates the decoding performance of the decoder. And compared with the scheme described in Document 6.

[0081] The simulation results of frame error rate and time complexity of different schemes are as follows: image 3 and Figure 4 As shown, the comparison results of detection performance and complexity of different decoding schemes show that the scheme of the present invention obtains an error correction performance close to that of the traditional unsimplified SC decoding algorithm. At the same time, the low-complexity polar code blind detection scheme of the present invention significantly reduces the time complexity of decodin...

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Abstract

The invention provides a low-complexity polarization code SC decoding method based on aggregation construction, and particularly relates to a reliable node aggregation construction method and a reliable node multipath decoding method based on node reliability. The node aggregation construction method does not depend on log-likelihood ratio information obtained through calculation in the decoding process and can be completed before decoding execution. The defect that the position of the reliable node needs to be judged through comparison operation in the decoding process in the existing literature is overcome. The implementation complexity of the decoder is reduced, and a large number of comparison and judgment operations irrelevant to SC decoding are omitted. The decoding method accords with the regulation of the 3GPP TS38.212 protocol on the polarization coding of the control channel, and the channel coding processing is completed strictly according to the regulation of the protocol at the PDCCH transmitting end. The method is suitable for traditional polarization code construction, polarization code construction adopting CRC cascading and coding construction of various fixed frozen set sequences. And the method has good universality and practicability.

Description

technical field [0001] The invention belongs to the communication field, in particular to a low-complexity decoding method based on a polar code constructed by aggregation. Background technique [0002] In the downlink of the mobile communication system, a Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) carries downlink control information (DCI, Downlink Control Information). The downlink control information records scheduling information for uplink and downlink data transmission, uplink power control information, and the like. Ensuring the quality of transmission and analysis of downlink control information is a prerequisite for realizing highly reliable downlink data transmission. In order to improve the transmission reliability of the downlink control channel, the control channel of the fifth-generation mobile communication enhanced mobile broadband scenario will use polar codes (Polar Codes) as [Reference 1 "Multiplexing and channel coding",...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H03M13/13
CPCH04L1/0045H04L1/0052H04L1/0057H03M13/13Y02D30/70
Inventor 刘荣科孙贺
Owner BEIHANG UNIV
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