基于国家电网用电信息采集规范,通过对信道估计和均衡算法分析,确定了在电力线载波通信(Power Line Communication,PLC)芯片中使用最小二乘法(Least Squares,LS)信道估计算法。在算法定点化分析过程中,研究了LS信道估计定点化实现时参...基于国家电网用电信息采集规范,通过对信道估计和均衡算法分析,确定了在电力线载波通信(Power Line Communication,PLC)芯片中使用最小二乘法(Least Squares,LS)信道估计算法。在算法定点化分析过程中,研究了LS信道估计定点化实现时参数的不同定点字长对系统性能的影响。综合考虑系统性能和面积的trade off(权衡),选取了芯片实现的最优定点化字长。为芯片的算法实现设计提供了一种算法分析方法。展开更多
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...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.展开更多
文摘基于国家电网用电信息采集规范,通过对信道估计和均衡算法分析,确定了在电力线载波通信(Power Line Communication,PLC)芯片中使用最小二乘法(Least Squares,LS)信道估计算法。在算法定点化分析过程中,研究了LS信道估计定点化实现时参数的不同定点字长对系统性能的影响。综合考虑系统性能和面积的trade off(权衡),选取了芯片实现的最优定点化字长。为芯片的算法实现设计提供了一种算法分析方法。
基金supported by the Major National Science & Technology Program of China(No.2009ZX01034)the National Natural Science Foundation of China(No.61102072)
文摘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.
