基于TDOA机场无线电监管能力的仿真与优化

Simulation and Optimization of TDOA-based Airports Radio Monitoring Capability

在民航空管部门查找的无线电干扰中,大功率无绳电话和广播干扰是主要干扰来源,短时间内快速准确定位干扰源是有效实施航空管制的关键。到达时间差(Time Difference of Arrival,TDOA)定位具有定位精度高、定位时间短和抗干扰抗多径的优点。在对TDOA研究的基础上,仿真对比了Fang、Chan和Taylor级数展开法的算法性能,对比得出Taylor级数展开法具有更强的稳定性和更小的定位误差。针对云南迪庆机场无线电监测现状,用Taylor级数展开法进行监测能力的评估,提出监测站可应用蜂窝布站方式来提高对干扰源的定位精度。仿真实验表明,TDOA定位能弥补无线电监测站定位的缺点,有效解决干扰源精确定位的问题。

The radio interferences detected by civil aviation management department, show that high-power cordless phones and radio interference are the two main interference sources.How to accurately locate the source in a short time is the key to Air Traffic Con- trol.The time difference of arrival （TDOA） location method uses interference sources to achieve tracking and location,and it has such advantages as high positioning accuracy,location in a short time,anti-muhipath and anti-interference.Based on studying TDOA location method,the performance simulation and comparison are performed for Fang, Chan and Taylor series expansion algorithms.The results show that Taylor series expansion method has better stability and lower positioning error. To assess the radio monitoring capability of Diqing airport in Yunnan province,it is simulated by using the Taylor location algorithm, and the cellular station distribution is proposed to improve the positioning accuracy.The simulation results show that TDOA positioning system can make up for the shortcomings of com- mon radio stations distribution, and effectively implement interference source location.