频率选择性衰落信道下STBC-SC-FDE系统的信道频率响应估计

本文针对频率选择性衰落信道下2发1收STBC-SC-FDE系统收发两端的信号编码与处理结构，应用系统的频率域输入—输出模型，设计了一种最小二乘信道频率响应（CFR）估计算法。对算法均方误差的分析表明，采用Chu序列作为最优训练序列不仅能够实现CFR估计的最小均方误差，而且能保证系统具有比较低的峰均功率比（PAPR）。该算法相比那些先估计信道时域响应（CIR）再转换为CFR的方法能够节省更多的计算资源。最后，Monte Carlo 仿真验证了该算法的性能。

Channel Frequency Response Estimation for STBC-SC-FDE Systems Over Frequency-Selective Fading Channels

In this paper, we study the signal coding and processing scheme of the STBC-SC-FDE systems with 2 transmit and 1 receive antenna over frequency-selective fading channels, and develop a least-squares channel frequency response estimation algorithm based on the input-output modal in frequency domain. We analyze the mean square error of the proposed algorithm, and get the result that the algorithm is not only able to achieve the minimum mean square error for channel estimation but also to make a communication system with a relative low peak-to-average power ratio by employing Chu sequences as its optimal training sequences. For SC-FDE systems, the proposed algorithm can save more computing resources than those algorithms that estimate channel impulse response firstly and then transfer it to frequency domain. In the end, the performance of the proposed algorithm is evaluated by Monte Carlo simulations.