The channel property of frequency selective fading and Doppler frequency shift are the biggest challenge to the broadband mobile communication service.
在信道的衰落特性中,对宽带无线移动业务影响最大的是多径衰落和多普勒频移。
参考来源 - OFDM无线宽带移动通信系统中信道估计与均衡技术研究There are lots of disadvantages in wireless environment, such as multi-paths fading, Doppler frequency shift and fast time varying of channel.
无线环境中存在多径衰落、多谱勒频移和信道快速时变等许多不利因素。
参考来源 - 空时编码在MIMO·2,447,543篇论文数据，部分数据来源于NoteExpress
The maximum Doppler frequency shift is an important parameter which affects the performance of the OFDM system.
在OFDM系统中，影响其性能的一个重要参数就是最大多普勒频移。
In the communication of multiplex system, the DS signal exists Doppler frequency shift for the high dynamic situation of aerocraft.
在复合系统通信中，飞行器的高动态使扩频信号存在多普勒频移。
Doppler frequency shift observation of ionospheric high frequency echo is an important method for studying ionospheric disturbances.
电离层高频反射回波的多普勒频移观测是研究电离层扰动的一个重要方法。
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