运动TDMA系统目标时差定位算法

TDOA Location Algorithms for Moving TDMA Target

根据时分多址(TDMA)系统的同步特征,利用TDMA运动目标准周期性信号的到达时间,提出了3种在三站时差定位系统中实现目标定位的算法。采用目标运动分析的方法,对TDMA目标位置的可观测性进行分析,提出了目标运动分析时差定位算法,利用目标航迹上多个位置的时差实现目标的定位。运用目标运动分析测距算法,提出了测距与传统时差定位和目标运动分析时差定位相结合的两种定位算法。3种定位算法充分利用了目标的运动特性,提高了TDMA目标的定位精度,避免了传统时差定位算法中的多解和无解现象。仿真结果验证了算法的有效性。

According to the time synchronization property of time division multiple access（TDMA） system, three location algorithms are proposed based on the measurements of time of arrival （TOA） of TDMA moving target. The method of target motion analysis （TMA） is used to analyse the observability condition of target position and realize the TMA time difference of arrival （TDOA） location （TDOA - M for short）. Other two joint algorithms of conventional TDOA location （TDOA - C） and TDOA - M with TMA ranging algorithm are presented. The proposed algorithms make full use of the target motion property to improve location precision and avoid the phenomenon of multiple solutions and no solution. The simulation results illustrate the validity of the proposed algorithms.