As visible light communication may be affected by a lot of noise , channel coding receives wide attention it is an important means of communication error correction . To improve the performance of channel decoding , increase the rate of information transmission and reduce the decoding complexity in the visible light communication , this paper uses a scheme with RS code and LDPC code cascaded .RS code has a good ability to handle unexpected errors , LDPC code has a good performance that is close to the Shannon limit .The scheme is easy to implement with low complexity .Simulation results shows that bit error rate is lower than uncoded , the ability of error correction has more promotion obviously , and the performance compares to different lengths of LDPC code in cascaded codes , when the bit error rate reaches 10 -3 , it can improve the gain amounting to about 2 dB.So it is suitable for visible light communication requirements in practical application .%由于可见光通信中可能会受到很多噪声干扰,信道编码受到了广泛的重视,它是重要的通信纠错方法,为改善可见光通信的信道译码性能,提高信息传输效率,降低译码复杂度,采用一种将RS码与LDPC码级联的方案.RS码具有很强的处理突发错误的能力,LDPC码具有接近香浓极限的良好性能.该方案实现简单,复杂度低.经仿真结果表明,该方法与未编码时相比,误码率低,纠错能力有明显提升,而且比较级联码中LDPC码不同码长的性能,误码率为10-3时,编码增益提高2 dB左右,适合可见光通信的实际应用的要求.
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