A Post-Processing Channel Estimation Method For DCO-OFDM Visible Light Communication

被引：0
|
作者：
Xiang Yang [1 ]
Zhang Min [1 ]
Tang Xiongyan [1 ]
Wu Jian [1 ]
Han Dahai [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
来源：
PROCEEDINGS OF THE 2012 8TH INTERNATIONAL SYMPOSIUM ON COMMUNICATION SYSTEMS, NETWORKS & DIGITAL SIGNAL PROCESSING (CSNDSP) | 2012年
关键词：
VLC DFT OFDM channel estimation; WIRELESS OPTICAL CHANNEL;
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this paper, we analyze the channel estimation technique for OFDM (orthogonal frequency division multiplexing) used in VLC (Visible Light Communication system). A Post-Processing DFT (Discrete Fourier Transformation) channel estimation method was proposed to improve the system performance by eliminating the noise outside the maximum channel delay. After linear interpolation, the channel estimation is transformed into time domain by DFT and truncate according to the maximum channel delay, and then goes back to frequency domain. LS (Least Square) algorithm and comb-type pilot is used in the simulation to validate the effectiveness of this DFT-based post-processing channel estimation method, and the BER performance is demonstrated with QPSK, 16-QAM and 64-QAM constellation order, also, different pilot number is considered.
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页数：4
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