Estimation of Two-Dimensional Correction Factors for Min-Sum Decoding of Regular LDPC Code

• 作者: Ahmed A. Hamad
• 来源期刊: 无线工程与技术(英文)
• 学科: 工学
• 关键词: LDPC Code Sum-Product Min-Sum 2-D CORRECTION Factors Software-Defined Radio (SDR)
• 年，卷（期）: 2013,（4）
• 页码范围: 181-187
• 页数: 7页
• 分类号: TN92

摘要

In this paper, two-dimensional (2-D) correction scheme is proposed to improve the performance of conventional Min-Sum (MS) decoding of regular low density parity check codes. The adopted algorithm to obtain the correction factors is simply based on estimating the mean square difference (MSD) between the transmitted codeword and the posteriori information of both bit and check node that produced at the MS decoder. Semi-practical tests using software-defined radio (SDR) and specific code simulations show that the proposed quasi-optimal algorithm provides a comparable error performance as Sum-Product (SP) decoding while requiring less complexity.