OFDM电力线通信系统的相位噪声估计与补偿  

Phase Noise Estimation and Compensation Scheme for OFDM Power Line Communication Systems

作　　者：赵慧冬[1] 黑勇[1] 乔树山[1] 

机构地区：[1]中国科学院微电子研究所,北京100029

出　　处：《电视技术》2012年第17期122-124,143,共4页Video Engineering

摘　　要：OFDM电力线通信系统对相位噪声非常敏感。由于电力线信道噪声大、衰减强,OFDM信号通过后发生严重失真,基于导频的公共相位误差估计效果变差。提出一种更可靠的相位噪声估计和补偿算法,能够更准确地估计公共相位误差。仿真结果表明该方法能够有效地抑制相位噪声。OFDM power line communication （PLC） systems are sensitive to phase noise. Due to the severe impulse noise and strong attenuation or power line channel, OFDM signals are distorted seriously after through the power line. The conventional common phase error （CPE） estimation based on pilots has poor performance in PLC system. An effective common phase noise estimation and compensation algorithm is proposed in this paper to estimate the CPE reliably. Simulations indicate that the proposed algorithm can suppress the phase noise effectively.

关 键 词：OFDM 电力线通信 相位噪声 

分 类 号：TN911.23[电子电信—通信与信息系统]