摘要
对非规则LDPC(lowdensityparitycodes)码在RICE信道的性能进行了分析和仿真,修正了BP(beliefpropagation)译码算法,证明了RICE信道满足对称性,给出了RICE信道译码稳定性条件,推导出了RICE信道的Shannon容量限.采用VC编程进行了仿真,仿真结果表明在码长N=3072、码率R=1/3时,与Shannon限相差2dB左右.进一步表明了LDPC码在包括RICE信道在内的各种信道中的性能都是非常优良的.
The performance of low density parity check code (LDPC) on Rician fading channel was analyzed and simulated, and the BP (belief propagation) decoding algorithm was modified. The symmetry of the channel was proved, and the stability conditions of the channel was shown. The Shannon limit of the channel was calculated. Using Visual C++ programming to simulate the performance, it indicates that when the code length is 3072 and the code rate is l/3, the distance with Shannon limit is about 2 dB. The performance of LDPC is also very effective on other kinds of channels.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2004年第2期48-53,共6页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金资助项目(60272052)
