通信学报Issue(2)：146-152,7.DOI:10.3969/j.issn.1000-436x.2014.02.019
具有低复杂度的LDPC已编码非相干酉空时调制系统设计
LDPC-coded unitary space-time modulation with low-complexity iterative demodulate-decoding scheme
摘要
Abstract
A practical low-density parity-check(LDPC) coded unitary space-time modulation (USTM) noncoherent MI-MO communication system over Rayleigh flat fading and additive white Gaussian noise (AWGN) channel was con-structed, where the LDPC code is selected from IEEE 802.16e Standard and USTM is constructed by the unitary matrix based on the sinc-cosinc function, SC-USTM for short. At the receiver, the maximum a posteriori probability (MAP) de-modulating algorithm of the SC-USTM was first designed;for reducing the complexity of MAP demodulator, the dual demodulator was then conceived;for improving the performance, the iterative feedback between the belief propagation (BP) decoder and the MPA demodulator was finally introduced. The simulation test shows that the system of the 510-LDPC coded SC-USTM is superior to the uncoded SC-USTM about 15~17 dB at BER , and this system has very low complexity.关键词
多入多出系统/酉空时调制/最大后验概率解调/低密度奇偶校验(LDPC)码/迭代反馈Key words
multiple-input multiple-output system/unitary space time modulation/maximum a posteriori probability demodulation/low-density parity-check codes/iterative feedback分类
信息技术与安全科学引用本文复制引用
王利娇,张林,杨玲玲,彭立,符达伟..具有低复杂度的LDPC已编码非相干酉空时调制系统设计[J].通信学报,2014,(2):146-152,7.基金项目
国家自然科学基金资助项目(61071069)Foundation Item:The National Natural Science Foundation of China(61071069) （61071069）
