Design of LDPC Codes over GF(q) for Bandwidth Efficient Transmission
Lei Wei-jia①; Li Xiang-ming②; Li Guang-jun①
①University of Electronic Science and Technology of China, Chengdu 610054, China;②Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Abstract:Optimization of binary LDPC (Low-Density Parity-Check) codes for application to binary PSK modulation has been demonstrated in the literature, on the basis of Monte-Carlo method proposed by Davey(1998). The lack of rotational symmetry in a generic q-ary signal constellation, however, limits the application of Davey’s method. This paper proposes an efficient Davey-type Monte Carlo technique for code optimization within the category of quasi-regular codes, so that one can directly combine the optimized LDPC code over GF(q) with arbitrary q-ary modulation to achieve bandwidth efficiency in transmission. The validity of the proposed design procedure is illustrated through examples combining quasi-regular LDPC codes with MQAM and MPSK signaling schemes.
雷维嘉; 李祥明; 李广军. 带宽有效传输的GF(q)上LDPC编码设计[J]. 电子与信息学报, 2007, 29(4): 884-887 .
Lei Wei-jia; Li Xiang-ming; Li Guang-jun. Design of LDPC Codes over GF(q) for Bandwidth Efficient Transmission. , 2007, 29(4): 884-887 .