在UV(紫外光)通信系统中噪声会对信号产生明显的干扰。为了改善UV系统的的通信质量, 采用了一种改进的LDPC(低密度奇偶校验)码算法, 并仿真了该算法在UV信道模型中NLOS(非视距传播)的性能。设计了LDPC(960,480)和RS(18,10)编解码器平台。实验结果表明: 在给定发送功率和10-6误码率的情况下, 相对于未编码的系统, 采用RS(里所)编解码仅增加了42%的可靠通信距离, 而采用LDPC编解码却能增加约100%的可靠通信距离, 能有效改善系统的通信性能。

Noises brings about obvious interferences with signals in Ultraviolet (UV) communication systems. For the purpose of improving the system communication quality, this paper implements an improved Low-Density Parity-Check (LDPC) codec algorithm and simulates its Non-Line-Of-Sight (NLOS) performances on a UV channel model. It conducts experiments on a LDPC (960,480) and RS (18,10) codec test bed. The experimental result shows that under the conditions of given power and 10-6 bit error rate, the reliable communication range increases by only 42% with RS relative to uncoded systems, but by 100% with LPDC, thus effectively improving the communication performance.