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Method for determining a doppler frequency shift of a wireless signal directly reflected by a moving object

机译:确定运动物体直接反射的无线信号的多普勒频移的方法

摘要

The present disclosure provides a method for determining a Doppler frequency shift of a wireless signal directly reflected by a moving object. An example method includes eliminating a random phase shift caused by non-synchronization between a wireless transmitting device and a wireless receiving device by using conjugate multiplication of the channel state information (CSI) on two antennas, thereby obtaining the complete Doppler frequency shift information from the phase information of the channel state information. The example method eliminates the effect on the Doppler frequency shift caused by frequency information of static paths in a manner of removing the mean, thereby obtaining an accurate frequency estimation of the moving object. A Multiple Signal Classification (MUSIC) algorithm may be used to estimate a frequency spectrum according to practical sampling intervals to avoid an effect on the frequency estimation accuracy caused by uneven sampling rate in a practical wireless transceiving system.
机译:本公开提供了一种用于确定由移动物体直接反射的无线信号的多普勒频移的方法。一种示例方法包括:通过使用两个天线上的信道状态信息(CSI)的共轭乘法,消除由无线发射设备和无线接收设备之间的不同步引起的随机相移,从而从天线获得完整的多普勒频移信息。信道状态信息的相位信息。该示例方法以消除均值的方式消除了静态路径的频率信息对多普勒频移的影响,从而获得了运动物体的精确频率估计。可以使用多信号分类(MUSIC)算法根据实际采样间隔来估计频谱,从而避免在实际的无线收发系统中由于采样率不均匀而对频率估计精度造成影响。

著录项

  • 公开/公告号US10630403B2

    专利类型

  • 公开/公告日2020-04-21

    原文格式PDF

  • 申请/专利权人 PEKING UNIVERSITY;

    申请/专利号US201816034853

  • 发明设计人 DAQING ZHANG;XIANG LI;

    申请日2018-07-13

  • 分类号H04B17/309;H04W56;H04B7/01;H04W4/02;

  • 国家 US

  • 入库时间 2022-08-21 11:29:20

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