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中文摘要：
本文研究了采用隐含训练序列无直流偏移影响的MIMO频率选择性信道的估计问题.通过选用具有平衡特性的二进制ZCZ序列作为训练序列,可以在不增加任何复杂度的情况下直接消除直流偏移量的影响.由于每根天线的发射数据经过预处理后再算术叠加到训练序列上,从而消除了传统隐含估计方法中未知数据对信道估计性能的影响.本文推导了采用新方法的MIMO信道估计误差方差表达式,并从时域的角度给出了分析.理论分析和仿真结果表明,本文方法性能优于已有的隐含信道估计方法.
英文摘要：
This paper addresses the problem of multiple-input multiple-output（MIMO） frequency selective channel estimation using implicit training without dc-offset（direct current）.In order to remove the dc-offset directly without introducing extra complexity,the ZCZ（Zero correlation zone） set with balance properties can be used as training sequences.Since the transmitted data from each antenna is first pre-processed and then arithmetically added onto the training sequences,thus the influence of the unknown data to the channel estimation existed in normal implicit method can be cancelled.In this paper,error variance of channel estimation vector is derived,and time-domain analysis is performed.Our theoretical analysis and simulation results validate the superiority of the new method compared with the conventional implicit estimation method.
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