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LDPC Coded Massive MIMO Systems.

Inho Hwang1, Han Jin Park1, Jeong Woo Lee1

  • 1School of Electrical and Electronics Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea.

Entropy (Basel, Switzerland)
|December 3, 2020
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Summary
This summary is machine-generated.

This study introduces a novel low-density parity-check (LDPC) coded massive multiple-input multiple-output (MIMO) system with an iterative joint detection and decoding (JDD) algorithm. The new design achieves a lower bit error rate than conventional systems.

Keywords:
LDPC codesdensity evolutionjoint detection and decodinglow complexitymassive MIMO

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Area of Science:

  • Wireless communication systems
  • Information theory
  • Digital signal processing

Background:

  • Massive MIMO systems offer significant spectral efficiency gains.
  • Low-density parity-check (LDPC) codes provide powerful error correction capabilities.
  • Joint detection and decoding (JDD) algorithms can enhance system performance by jointly optimizing these processes.

Purpose of the Study:

  • To design a coded massive MIMO system utilizing LDPC codes and a low-complexity iterative JDD algorithm.
  • To introduce a factor graph representation for LDPC coded massive MIMO systems to define JDD message updating rules.
  • To develop a 3D EXIT chart for analyzing JDD behavior and optimizing LDPC code design.

Main Methods:

  • Development of a factor graph representation for the LDPC coded massive MIMO system.
  • Implementation of an iterative JDD algorithm with low-complexity detection.
  • Creation of a 3D EXIT chart tool for analyzing message transfer characteristics.
  • Joint design of irregular LDPC code degree distribution and JDD strategy based on 3D EXIT analysis.

Main Results:

  • The proposed 3D EXIT analysis provides a visualization of JDD behavior.
  • The joint design of LDPC codes and JDD strategy optimizes error correction capability for a given complexity.
  • The novel coded massive MIMO system demonstrates a lower bit error rate compared to conventional systems.

Conclusions:

  • The proposed LDPC coded massive MIMO system with the optimized JDD strategy offers superior performance.
  • The 3D EXIT analysis is an effective tool for designing and optimizing coded massive MIMO systems.
  • This work contributes to the advancement of efficient and high-performance wireless communication systems.