中文摘要：

针对传统单站无法实现时差定位、多站定位布站选址困难的情况,提出了一种利用多元外辐射源实现单站时差定位的方法,并推导了定位算法和详细流程.基于几何精度因子（GDOP）方法分析了不同时差测量精度、基线长度、布站方式对定位精度的影响.利用Monte-Carlo仿真验证了定位算法的有效性,也说明了这种利用多元外辐射源定位新思路的可行性.仿真结果表明,该定位方法在长基线、Y型布站时定位精度最高,相比均采用地面外辐射源定位,利用卫星与地面外辐射源结合的方式可以使三维定位精度提高10倍以上.

英文摘要：

Single observer can not achieve time difference of arrival（TDOA） location and it is difficult tofind appropriate observers in multi-observer location. For the problems,a single observer passive TDOA lo-cation method is proposed based on multiple external emitters and the location algorithm and its flow aregiven. The influence of different time-delay measurement precisions,length of the baselines and layout pat-tern of observers on location precision is analyzed according to the geometric dilution of precision（GDOP）measurement. The Monte-Carlo simulations demonstrate the efficiency of the algorithm and the feasibility ofthe new location method based on multiple external emitters. The simulation results show that the locationprecision of the layout like Y form and long baseline is the highest. In comparison with location based onground external emitters only,the location precision can improve 10 times higher when the satellite and theground external emitters are adopted jointly.