MIMO-OFDM/OQAM系统中基于导频的时域信道估计方法

摘要

The problem of channel estimation in multiple input multiple output orthogonal frequency division multiplexing with offset quadrature amplitude modulation (MIMO-OFDM/OQAM) systems is considered.The general preamble-based time domain channel estimation model is proposed and the frequency domain pilots are used to estimate the time domain channel impulse responses.Different from the conventional methods,this method needs fewer pilots overhead and has better estimation performance for highly frequency selective channels.Theoretical analyses and simulation results show the effectiveness of the proposed method.%针对基于交错正交幅度调制的多输入多输出正交频分复用(multiple input multiple output orthogonal frequency division multiplexing with offset quadrature amplitude modulation,MIMO-OFDM/OQAM)系统的信道估计问题,构造了基于导频的时域信道估计模型,利用导频符号估计信道的时域脉冲响应.与传统的频域信道估计方法相比,这种方法需要的导频数量较少,并且在存在严重频率选择性衰落的信道条件下也有较好的估计性能,理论分析和仿真结果表明了算法的有效性.