Design and implementation of channel estimation for low-voltage power line communication systems based on OFDM  

作　　者：赵慧冬 黑勇 乔树山 叶甜春 

机构地区：[1]Institution of Microelectronics,Chinese Academy of Sciences

出　　处：《Journal of Semiconductors》2012年第10期129-133,共5页半导体学报（英文版）

基　　金：supported by the Major National Science & Technology Program of China(No.2009ZX01034);the National Natural Science Foundation of China(No.61102072)

摘　　要：An optimized channel estimation algorithm based on a time-spread structure in OFDM low-voltage power line communication（PLC） systems is proposed to achieve a lower bit error rate（BER）.This paper optimizes the best maximum multi-path delay of the linear minimum mean square error（LMMSE） algorithm in time-domain spread OFDM systems.Simulation results indicate that the BER of the improved method is lower than that of conventional LMMSE algorithm,especially when the signal-to-noise ratio（SNR） is lower than 0 dB.Both the LMMSE algorithm and the proposed algorithm are implemented and fabricated in CSMC 0.18μm technology. This paper analyzes and compares the hardware complexity and performance of the two algorithms.Measurements indicate that the proposed channel estimator has better performance than the conventional estimator.An optimized channel estimation algorithm based on a time-spread structure in OFDM low-voltage power line communication（PLC） systems is proposed to achieve a lower bit error rate（BER）.This paper optimizes the best maximum multi-path delay of the linear minimum mean square error（LMMSE） algorithm in time-domain spread OFDM systems.Simulation results indicate that the BER of the improved method is lower than that of conventional LMMSE algorithm,especially when the signal-to-noise ratio（SNR） is lower than 0 dB.Both the LMMSE algorithm and the proposed algorithm are implemented and fabricated in CSMC 0.18μm technology. This paper analyzes and compares the hardware complexity and performance of the two algorithms.Measurements indicate that the proposed channel estimator has better performance than the conventional estimator.

关 键 词：OFDM PLC channel estimation time-domain spread VLSI 

分 类 号：TN913.6[电子电信—通信与信息系统] TN948.14[电子电信—信息与通信工程]