徐恒舟 趙可新 李楠 朱海
摘? 要: 文中提出一種設計LDPC碼的掩模矩陣和疊加矩陣的新方法。該方法使用可分解設計的關聯(lián)矩陣構造掩模矩陣和疊加矩陣,并結合結構化矩陣得到更稀疏的準循環(huán)校驗矩陣。數(shù)值仿真結果表明,與CCSDS標準中的LDPC碼相比,所構造的LDPC碼的譯碼性能均有所提升,并且譯碼收斂很快。
關鍵詞: 低密度校驗碼; 掩模矩陣設計; 疊加矩陣設計; 可分解設計; 數(shù)值分析; 準循環(huán)校驗矩陣
中圖分類號: TN911.22?34? ? ? ? ? ? ? ? ? ? ? ? ?文獻標識碼: A? ? ? ? ? ? ? ? ? ? ? ?文章編號: 1004?373X(2020)13?0028?04
Design of masking and superposition matrices
based on resolvable designs for LDPC codes
XU Hengzhou, ZHAO Kexin, LI Nan, ZHU Hai
(School of Network Engineering, Zhoukou Normal University, Zhoukou 466001, China)
Abstract: A new method for constructing masking and superposition matrices for low?density parity?check (LDPC) codes is proposed. The resolvable design′s incidence matrix is adopted in the proposed construction method to construct masking matrix and superposition matrix. In combination with the structured matrices, a much sparser check matrix with quasi?cyclic (QC) structure is obtained. The numerical simulation results show that the decoding performance of the constructed LDPC codes outperforms that of the LDPC codes in the CCSDS standard, and their decoding converges fast.
Keywords: LDPC code; masking matrix design; superposition matrix design; resolvable design; numerical analysis; QC check matrix