时变WOC信道的二阶盲辨识与估计研究

Blind Identification and Estimation for Time-Varied Indoor WOC Channel

时变及干扰严重是室内光无线通信应用的主要限制 .本文引入基于二阶统计量的盲辨识信道估计与去噪策略 ,对WOC室内信道变化进行自适应跟踪 .采用不同的WOC信道作为研究对象 ,完成了对噪声的估计及信道系数的预测 .模拟中对SNR的跟踪范围达 30dB ,结果证明该方法对信道变化具有适应性 .利用该方法对WOC进行改进 ,可以获得稳定、高效的WOC室内应用系统 .

Under motion condition,the channel of Wireless Optical Communication (WOC) suffers from the serious time varied?space varied phase.The ability adaptive to the change of WOC channel is so important that we will discuss the blind identification and channel estimate herein.Based on the Second Order Statistics,denoising,channel estimate of special WOC receiver transmitter (RT) configuration indoor are obtained in our simulations.The simulated range of SNR is high up to 30dB.The main errors under those WOC condition,are the survivals of singular value decomposition of autocorrelation function and the denoising,which obtained by our detail analysis.The estimate results which coincide with oral channel quantities in different SNR condition is achieved also.