AOA Estimation for UWB Positioning Using a Mono-station Antenna Array
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摘要: 该文提出一种基于单基站六角单极定向天线阵列的到达角(Angle Of Arrival, AOA)估计方法，用于超宽带(UWB)室内精确定位。该文设计的AOA估计方法是通过测量各天线接收脉冲幅度信息，结合加入了动态参数的天线阵列的波束方向图，从而获得AOA，避免了传统多基站定位系统中采用测量脉冲到达时间差的方法带来的部署困难以及精度不足问题。仿真结果显示，使用该文提出的AOA估计方法，估计误差小于1的概率可达到96%，在IEEE802.15.4a CM3信道下，当定位距离为10 m时，定位误差小于15 cm的概率可达80%。因此，基于该文单基站AOA估计方法的UWB定位系统部署简单，并且可提供精确的定位精度，是一种有效的定位方法。Abstract: An Angle Of Arrival (AOA) estimation method for Ultra WideBand (UWB) positioning based on a mono-station Hexagonal monopole antenna array is proposed. The AOA information is obtained from the received pulse amplitudes combined with the antenna array beam pattern including dynamic parameters, rather than the time difference of pulses arrival. Performance results are presented in this paper. It shows that an AOA estimation error of less than 1 degree can be achieved with a probability of 96%. Over a location distance of 10 m via IEEE 802.15.4a CM3 channel, the proposed AOA estimation algorithm results in an error of less than 15 cm with a probability of 80%. This UWB system can be simply deployed. It also provides high accuracy, so it is an effective positioning solution.
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Key words:
- Ultra WideBand (UWB) positioning /
- Mono-station /
- Antenna array /
- Pulse amplitude
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