高速白光LED光通信系统中的码间干扰及其抑制

摘要

Inter-symbol Interference (ISI) is an important factor that affects the performance of communication system. How to restrain ISI becomes the key to improve the performance of high-speed white LED optical communication system. This paper describes the generating mechanism of inter-symbol interference and its influence on high-speed white LED optical communication system. A discussion of traditional methods against ISI is given and a technology called diversity reception is proposed. The experimental results show that the diversity reception technology can effectively restrain the influence to communication system caused by ISL the average SNR raised 2dB.%码间干扰是影响通信系统质量的重要因素,码间干扰的抑制成为改善高速白光LED光通信系统性能的关键.分析了码间干扰的产生机理及其对高速白光LED光通信系统的影响,讨论了传统的抑制码间干扰的方法以及提出分集接收的抑制技术.实验结果表明,分集接收技术能有效抑制码间干扰对高速白光LED光通信系统的影响,系统信噪比平均提高2dB.