无线电工程2026，Vol.56Issue(4)：574-581,8.DOI:10.3969/j.issn.1003-3106.2026.04.002
RIS辅助的SC-LDPC乘积码中继协作码的构造与交替译码研究
Research on Construction and Alternating Decoding of RIS-assisted SC-LDPC Product Relay Code Cooperation
摘要
Abstract
Relay cooperation based on Reconfigurable Intelligent Surface(RIS)-assisted Spatially-Coupled Low Density Parity Check(SC-LDPC)product codes is investigated.The source node performs row encoding on the information matrix using SC-LDPC product codes,while the relay node performs column encoding on the same matrix.To further enhance the coding gain,a Replication and Masking(R&M)-based algebraic construction method is adopted to design the parity-check matrix of the SC-LDPC codes for cycle elimination.The short cycles in the parity check matrix are systematically eliminated,which significantly increases the girth of the code and reduces the error floor.The destination node performs alternating decoding between row decoding and column decoding of the SC-LDPC product codes on the two received signals,enabling full information exchange during the decoding process.The proposed decoding method facilitates real-time soft information exchange between the row and column dimensions.This interaction enables earlier detection and correction of potential errors,thereby enhancing both the convergence rate of iterations and the overall decoding reliability.Simulation results demonstrate that the SC-LDPC product codes constructed via the R&M algebraic method achieve superior performance compared to conventional SC-LDPC product codes.Moreover,the information exchange between column decoding and row decoding contributes to improved decoding efficiency and reduced Bit Error Rate(BER).关键词
可重构智能表面/空间耦合低密度奇偶校验/乘积码/校验矩阵/编码中继协作/交替迭代译码Key words
RIS/SC-LDPC/product codes/parity-check matrix/coded relay cooperation/alternating iterative decoding分类
信息技术与安全科学引用本文复制引用
杨晨,张顺外..RIS辅助的SC-LDPC乘积码中继协作码的构造与交替译码研究[J].无线电工程,2026,56(4):574-581,8.基金项目
江苏省高等学校自然科学研究项目(20KJB510034) （20KJB510034）
南京邮电大学校级自然科学基金(NY224129)Natural Science Research Project of Jiangsu Province Universities(20KJB510034) （NY224129）
Natural Science Foundation of Nanjing University of Posts and Telecommunications(NY224129) （NY224129）
