无人机载多站无源定位系统精度分析  

Precision Analysis of Airborne Passive Location of Multi-stations

作　　者：杨丽丽[1] 孙晓闻[1] 

机构地区：[1]中国电子科技集团公司第14研究所,南京210013

出　　处：《中国电子科学研究院学报》2014年第4期348-352,共5页Journal of China Academy of Electronics and Information Technology

摘　　要：无人机载多站无源定位系统构成简单,优点众多,是一种先进的探测侦察系统。对采用到达时间差(TDOA)定位的多站无人机无源定位系统进行了研究,详细推导了时差无源定位原理和定位精度,仿真分析了布站方式、站址误差、测时误差,以及基线长度对定位精度的影响。仿真结果表明Y型和倒Y型布站方式,定位精度比其它布站方式高;菱形布站方式在偏离基线方向(Y轴方向)具有较好的定位精度;主站与辅站的基线距离越长,定位精度越高;站址误差与测时误差越大,定位精度越差。在实际的布站中可以综合考虑以上因素,根据实际需要,采用最佳的布站方式,从而得到比较好的定位精度。The passive location system of muhi-UAVs is an advanced surveillance detecting system, which is structurally simple and has many advantages. The principle of passive location of 4-stations based on TDOA （ time difference of arrival） and its location precision are deduced in detail. Then the influence of the style of station distribution, error of station address, error of time, and baseline length of station distribution are simulated and analyzed. The simulation result shows that the GDOP （geometrical dilution of precision） of Y and reversed Y is better than other style of stations distribution; the GDOP of lozenge in the direction of anti-baseline （Y axial orientation） is higher. In addition, the GDOP is higher when the baseline length is longer, while it is lower when the error of station address and time are bigger. All of that factor can be considered when choosing the style of stations distribution. The GDOP will be better if choosing optical stations distribution according to actual requirements.

关 键 词：无源定位 精度分析 四站时差 

分 类 号：TN957.51[电子电信—信号与信息处理] V249[电子电信—信息与通信工程]