可见光通信系统的自适应信道估计研究  

Adaptive channel estimation study of optical communication system

作　　者：武琰[1] 

机构地区：[1]广东海洋大学电子与信息工程学院,广东湛江524005

出　　处：《激光杂志》2017年第6期203-206,共4页Laser Journal

基　　金：广东教育厅项目(JS20140023)

摘　　要：针对当前可见光通信系统自适应信道估计法缺点,建立了一种可见光通信系统自适应信道估计方法。首先充分考虑信道频率响应特性,采用正交频分复用方法把自适应信道切割为多段并行子道,调制信号以低时速在各子道中传输,然后当自适应信道中无传输任务时,使用锯齿型导频信号抑制频域响应波动,当自适应信道进行信号传输时,最后采用MMSE检测法进行自适应信道估计。实验结果证明,本文方法信道估计误差小,误码率低,整体性能高。In view of the current adaptive channel estimation method of visible light communication system faults, a visible light communication system is established adaptive channei estimation method. First fully considering the channel frequency response characteristics, using the orthogonal frequency division multiplexing method to cut the a- daptive channel multi-segment and muck, modulation signal with low speed in the transmission of the son, and then when no transmission tasks in adaptive channel, using a zigzag pilot signal frequency domain response inhibition, when adaptive channel for signal transmission, finally using adaptive channel estimation of MMSE test. The experimental re- suits show that the method of channel estimation error is small, low bit error rate, the overall performance is high.

关 键 词：可见光 通信系统 频率响应特性 自适应信道估计 

分 类 号：TN929.1[电子电信—通信与信息系统]