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.
出处
《激光杂志》
北大核心
2017年第6期203-206,共4页
Laser Journal
基金
广东教育厅项目(JS20140023)
关键词
可见光
通信系统
频率响应特性
自适应信道估计
visible light
communication systems
frequency response
adaptive channel estimation
