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A Polar Code-Based Asynchronous Multi-Level Bit Interleaved Coding and Modulation Method

A bit interleaving, coding modulation technology, applied in the coding modulation field in wireless communication, can solve problems such as large mutual information loss, and achieve the effects of optimizing polarization performance, reducing decoding complexity, and reducing code length

Active Publication Date: 2022-06-21
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to reduce the interference between data streams, BIPCM uses Gray mapping, which brings a large loss of mutual information, and the group error rate performance is inferior to that of MLPCM.

Method used

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  • A Polar Code-Based Asynchronous Multi-Level Bit Interleaved Coding and Modulation Method
  • A Polar Code-Based Asynchronous Multi-Level Bit Interleaved Coding and Modulation Method
  • A Polar Code-Based Asynchronous Multi-Level Bit Interleaved Coding and Modulation Method

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Embodiment Construction

[0091] The present invention will be further described below in conjunction with the accompanying drawings.

[0092] The embodiment is described by taking the frame length N=128, the code rate R=0.2, and 64 quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM) as an example.

[0093] A polar code-based asynchronous multi-level bit interleaving coding and modulation method proposed by the present invention includes the following steps:

[0094] Step 1. Generate the best coding mode and modulation mode: let N represent the frame length, R is the code rate, and the modulation order is 2 m , m is the power, m=1,2,3,4,...; S={1,2,...,m} is the bit index set in the modulation process; S can be divided into multiple subsets, from From a mathematical point of view, the coding mode (used in the coding process) and the modulation mode (used in the modulation process) are regarded as two ways of dividing S.

[0095] Get the best coding mode and modulation mode by trave...

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Abstract

The invention discloses a polar code-based asynchronous multi-level bit interleaving coding and modulation method, which includes the following steps: firstly obtain the best coding mode and modulation mode for system coding and modulation through traversal search, and then use the Gaussian approximation method to obtain The transmission position of information bits; polar code encoding; interleaving the encoded data; data storage at the sending end; modulation; receiving signals at the receiving end; calculating and storing symbol likelihood ratios; decoding and code reconstruction; storing bit sequences . The invention reduces the complexity of storage and decoding under the condition that the group error rate performance is not damaged, and is suitable for practical communication applications.

Description

technical field [0001] The invention belongs to the technical field of coding and modulation in wireless communication, and in particular relates to an asynchronous multi-level bit interleaving coding and modulation method based on polar codes. Background technique [0002] The coding and modulation technology based on polar codes refers to the combination of polar codes and high-order modulation, thereby improving the spectral efficiency of the communication system. [0003] Multilevel polar-coded modulation (MLPCM) is a coding modulation technique based on polar codes that has been studied more. for 2 m (m=1,2,3,4,...) digital modulation, MLPCM divides the input data stream into m priorities, and decodes them in multiple stages according to the priority of the data stream at the receiving end. The decomposition (set partition, SP) mapping reaches the channel capacity. The MLPCM transmitter needs m encoders, and the receiver needs m decoders. [0004] Bit-interleaved po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/0057H04L1/0071H04L1/0003H04L1/0009
Inventor 潘志文胡耀月刘楠尤肖虎
Owner SOUTHEAST UNIV
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