激光技术2012，Vol.36Issue(3)：334-337,389,5.DOI:10.3969/j.issn.1001-3806.2012.03.012
基于LDPC码和BPPM的无线光通信系统性能研究
Performance study of optical wireless communication system based on LDPC code and BPPM
摘要
Abstract
Performance of optical wireless communication system based on binary pulse position modulation (BPPM) and low-density parity-check(LDPC) code through atmospheric turbulence channel was investigated in the both situations of perfect channel state information ( CSI) and non-channel state information ( NCSI) compared with LDPC coded optical wireless communication system based on on-off keying(OOK) with the same bite rate and the same average transmission power. Simulation results show that in the both situations of CSI and NCSI, optical wireless communication systems based on LDPC code and BPPM have more excellent bit error rate performance than that of LDPC coded optical wireless communication systems based on OOK, and when decoded with the average fading amplitude as an estimate of the NCSI channel, performance of optical wireless communication system based on LDPC and BPPM are not degraded too much compared to the CSI channel, and it was also found that LDPC coded optical wireless communication systems based on BPPM are less sensitive to turbulent intensity than the systems based on OOK. Therefore, in the situation of NCSI, LDPC coded optical wireless communication systems based on BPPM have excellent error correction capabilities and access to a larger coding gains, and the above scheme is well suited for optical wireless communication systems.关键词
光通信/低密度奇偶校验码/调制方式/大气湍流信道Key words
optical communication/ low-density parity-check code/ modulation scheme/ atmospheric turbulence分类
信息技术与安全科学引用本文复制引用
冷蛟锋,郝士琦,吕旭光,闫飞..基于LDPC码和BPPM的无线光通信系统性能研究[J].激光技术,2012,36(3):334-337,389,5.基金项目
国家自然科学基金资助项目(60902017) （60902017）
安徽省自然科学基金资助项目(1004060Q60) （1004060Q60）
