摘要
提出了一种接收端过采样的单载波频域均衡系统信道频率响应盲估计算法.与传统的线性预测时域信道盲估计方法不同,新算法不需要计算新息以及新息和输出序列的互相关,而是直接从预测滤波器系数获得信道频率响应的闭式解.算法对信道阶次过估计具有鲁棒性,比传统的线性预测时域信道估计具有更高的估计精度,而且能保证估计结果对应的时域信道冲激响应的有限支撑特性.计算机仿真结果验证了理论分析的正确性.
A blind scheme to estimate channel frequency response（CFR） in oversampled single-carrier frequency-domain equalization（SC-FDE） systems based on linear prediction algorithm（LPA） is developed. Compared with conventional LPA based time-domain channel estimation approach, this method obtains the closed-form solution for CFR directly from tap weights of the prediction filter, rather than cross-correlation of innovation and measurements. The proposal is robust to channel order overestimation. Its performance is better than that of conventional LPA based time-domain channel estimation approach. Futhermore, it ensures that the channel estimation in time-domain appears finite supporting. Simulations confirm our analysis.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2009年第4期77-80,98,共5页
Journal of Beijing University of Posts and Telecommunications
基金
国家高技术研究发展计划项目(2006AA09Z108)
湖南省教育厅资助项目(08C196)
关键词
单载波频域均衡
信道频率响应
盲估计
线性预测算法
single-carrier frequency-domain equalization
channel frequency response
blind estimation
linear prediction algorithm
