基于Turbo码的相干光通信系统性能研究

Research on characteristics of coherent optical communication system based on turbo code

为提高无线光通信系统的可靠性,提出并分析了基于Turbo码的空间相干光通信系统.对空间无线光通信中的衰减和噪声进行了分析,通过仿真得出了特性曲线.借助系统BER的上限,比较了基于Turbo码的BPSK调制的相干无线光通信系统与PPM调制的非相干无线光通信系统和未编码无线光通信系统性能,结果表明:Turbo码技术应用在相干光通信系统中,提高了系统的抗干扰能力,节省了发射光功率,提高了系统性能.

A space coherent optical communication system based on Turbo code is introduced and investigated. Based on analysis on losses and noises of space wireless optical communication, characteristics of the optical wireless communication system based on Turbo code were presented with simulations. Compared with PPM modulation incoherent wireless optical communication system and uncoded system, the Turbo coded BPSK modulation coherent wireless optical communication system improved the performance of optical wireless link, because applying Turbo code technology to coherent optical communication system improved jamming-rejection capability of the system and effectively saved emissive optical power.