利用单基站对三维运动目标定位与跟踪
Locating and Tracking of 3-D Moving Targets Using Single Base Station
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摘要: 该文提出了一种利用单个CDMA基站发射的导频序列对三维运动目标进行定位与跟踪的方法。首先，利用直达干扰信号与目标反射信号的多普勒频移的不同及伪随机序列自相关函数的特点抑制直达分量，估计相对时延；其次，用与Chan(1994)类似的方法初步估计目标位置；最后,根据目标在短时间内的运动可近似为匀速直线运动的特点来改善定位精度，并实现测速。仿真结果证明了该方法的有效性。
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关键词:
- 导频序列; 波达时间差; 定位
Abstract: A method of position locating and tracking using pilot .sequence transmitted by the single CDMA Base Stations(BS) for 3-D moving targets is presented in this paper. First, based on the fact that the interfering component is different from the signal reflected by the moving target in the Doppler shift and the property of the auto-correlation function of PN sequence, the interfering component is filtered and the Time Difference Of Arrival(TDOA) is estimated. Then, position location is obtained using the method similar to Chan(1994). Finally, considering the fact that the motion of target is linear with constant speed vector in short duration, the accuracy of position location is improved and the velocity of target is estimated. Its effectiveness is verified by the simulation results. -
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