基于智能天线CDMA系统测向交叉定位方法的研究

Study on Direction Finding Triangulation Based on Smart Antenna CDMA System

文中针对8阵元智能天线 CDMA 系统,提出了一种测向定位新方法。该方法根据预多波束智能天线的特点,利用接收信号的功率特性估计移动台方位角,然后采用测向交叉定位,通过迭代,引入松弛变量等方法抑制 NLOS 带来的误差。同时仿真了多种环境下,信道衰落、非视距、多用户干扰等因素对这一系统定位精度的影响。该系统大大提高了同时定位用户数,计算复杂度小,适用于 TD—SCDMA 系统定位。仿真表明该系统定位精度较高。

This paper proposes a new direction-finding and location method based on the CDMA system with eight ele- ments smart antenna array.According as the characters of switched beam antenna,it employed the characters of signal power to estimate the angle and employed direction finding triangulation location to estimate the location.This paper in- vestigated the performance of the system in multi-environment that considered channel fading,multi-channel,none-of- light and multi-user interference.The system is simple and increases the system capacity,can be applied to TD-SCD- MA.The simulation proves the location precision of the system is higher.