SIMO SC-FDE系统的CFR盲估计

Blind CFR Estimation for SIMO SC-FDE Systems

提出了一种基于线性预测的单输入多输出单载波频域均衡系统频域信道响应(也称为信道频率响应,CFR)盲估计算法。与传统的线性预测时域信道估计方法不同,提出的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频域信道响应估计的闭式解。算法仅采用输出序列的二阶统计量,对信道阶次过估计具有鲁棒性,并且估计性能优于传统的线性预测时域信道估计方法。计算机仿真结果验证了理论分析的正确性。

A blind scheme to estimate frequency-domain channel response （is also called channel frequency response, CFR） in single-input multiple-output （SIMO） single-carrier frequency-domain equalization （SC-FDE） systems based on linear prediction algorithm（LPA） was presented. Compared with conventional LPA based time-domain channel estimation approach, this method obtains the closed-form solution for channel estimation in frequency-domain directly from tap weights of the prediction filter, rather than Cross-correlation of innovation and measurements. It exploits merely secondorder statistics（SOS）, and is robust to channel order overestimation. Furthermore, the performance of the proposal is better than conventional LPA based time-domain channel estimation approach. Finally, computer simulations confirm the theoretical analysis.