现代电子技术2012，Vol.35Issue(5)：74-79,6.
OFDM系统中抗非线性失真的迭代信道估计算法
Iterative channel estimation for nonlinearly distorted OFDM system
摘要
Abstract
An iterative channel estimation algorithm based on comb-type pilot arrangement is proposed to improve the performance of clipped OFDM systems. It iteratively estimated nonlinear noise due to signal clipping. And then it was used to compensate for nonlinear distortion of the symbols. A theoretical lower bound of the proposed method can be achieved in amplitude limiting pre-distortion was derived, and the theoretical MSE of the traditional LS channel estimation was also given. Simulation results show that the proposed algorithm overcomes the performance bottleneck caused by clipping ,and it has good convergence rate. Compared with the traditional method, this algorithm can resist stronger clipping.关键词
无线多媒体传感网/正交频分复用/峰均比/预畸变/迭代信道估计Key words
wireless multimedia sensor networks OFDM/ peak-to-average power ratio/ pre-distortion/ iterative channel estimation分类
信息技术与安全科学引用本文复制引用
解永生,周磊磊,罗炬锋,付耀先..OFDM系统中抗非线性失真的迭代信道估计算法[J].现代电子技术,2012,35(5):74-79,6.基金项目
国家重大专项(2010ZX03006-003)资助课题 （2010ZX03006-003）
