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电子学报  2013 

高速移动环境下基于正交角域子空间投影的时频同步算法研究

DOI: 10.3969/j.issn.0372-2112.2013.10.034, PP. 2094-2099

Keywords: 无线通信,高速移动,正交角域子空间投影,时频同步

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Abstract:

在高速移动环境下,无线信道显现出较强的时变特性.由于各个到达径的多普勒频移不一致所导致的多普勒扩展,使得系统时频同步算法性能急剧下降.针对此问题,该文提出了一种基于正交角域子空间投影的时频同步算法.该算法利用多天线系统提供的角域分辨力,将多普勒扩展简化为各个正交角域子空间上的多普勒频移,从而提高时频同步算法的性能.仿真结果表明,在高速移动环境下,该文提出的算法有效地抑制了无线信道的时变特性对时频同步算法的影响,获得了较好的系统性能.

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