陈喆

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:信息与通信工程学院

学科:信号与信息处理. 通信与信息系统

办公地点:大连理工大学创新园大厦A526室

联系方式:0411-84706005-3526

电子邮箱:zhechen@dlut.edu.cn

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An Effective Channel Estimation Method for Noisy Power Line Communication

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论文类型:会议论文

发表时间:2013-10-01

页面范围:425-433

关键字:power line communications;pilot pattern;sparse channel

摘要:  Power line channel is not a typical sparse channel, but when signal to noise ratio (SNR) is low, using sparse channel estimation can improve the broadband power line communication (BPLC) system performance.The pilot pattern is crucial to the pilot-assisted estimation performance of sparse channel.An optimal pilot pattern based on the rule of minimizing the coherence of measurement matrix has been concerned in the early studies.But this pilot pattern design didn't take pilot SNR into account.In this paper, a real-time pilot placement method is proposed for the sparse channel estimation in PLC.Not only the coherence of the measurement matrix are taken into account but also the pilot SNR at the receiver.The optimal pilot pattern based on the rule of minimizing the coherence of measurement matrix is applied as the initial pilot pattern.And then some pilot positions are changed in realtime according to the PLC channel frequency characteristic.It makes a tradeoff between minimizing the coherence of measurement matrix and increase pilot SNR to give a better performance.The simulation results show that the proposed method can improve channel estimation performance in terms of both mean square error (MSE) and system bit error rate (BER) performance.