电子学报2024，Vol.52Issue(4)：1132-1143,12.DOI:10.12263/DZXB.20230972
基于基模图的码率兼容广义稀疏随机码及空天通信应用
Protograph-Based Rate-Compatible Generalized Sparse Random Codes and Its Applications in Space Communications
摘要
Abstract
Space communication is facing with harsh and dynamically changing electromagnetic environments.As the classical coding algorithm is designed based on the assumption of Gaussian channels,its direct application in space com-munication will result in low communication resource efficiency,poor flexibility,and transmission reliability deficiencies.This paper proposes a protograph-based generalized sparse random coding construction and implementation method for non-Gaussian channels in space communication.By introducing high-dimensional algebraic constraints on the protograph-based random coding architecture,the decoding performance at extremely low code rates is improved.This paper also proposes a multi-rate compatible coding structure for non-Gaussian channels and different application scenarios by dynamically adjust-ing the order and dimension of high-dimensional constraints.Finally,test results show that the proposed codes can achieve a large coding rate ranging from 1/40 to approximately 1,a variable information length ranging from 104 bits to 20000 bits,and a variable throughput ranging from 25 Kbps to 10 Gbps,which can achieve a frame error rate of 1.0×10-4 at a low SNR of-37.1 dB(corresponding to Eb/N0=-0.79 dB).关键词
空天通信/广义稀疏随机码/非高斯信道/编码构造/码率兼容Key words
space communication/generalized sparse random codes/non-Gaussian channel/code construction/rate-compatible分类
信息技术与安全科学引用本文复制引用
章磊,陈钊,殷柳国..基于基模图的码率兼容广义稀疏随机码及空天通信应用[J].电子学报,2024,52(4):1132-1143,12.基金项目
国家自然科学基金(No.62025110,No.62101308) National Natural Science Foundation of China(No.62025110,No.62101308) （No.62025110,No.62101308）
