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 *** 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 *** 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 *** indicate that the proposed channel estimator has better performance than the conventional estimator.