去中心化时差频差直接定位方法

发布时间：2018-05-04 08:06

本文选题：直接定位 + 无源定位　；参考：《航空学报》2017年05期

【摘要】：针对原始利用时差频差的直接定位(DPD)方法存在数据传输量和计算量大的瓶颈,提出了两种去中心化直接定位方法。第1种方法采用去中心化配对方案,只将各观测站截获信号在站间进行一次传输,将数据传输和计算分散到各观测站间并行计算互模糊函数(CAF),构造仅满足满秩条件的互模糊矩阵(CAM)。第2种方法根据推导的任意互模糊函数间关系公式,采用归约方式去中心化的在各观测站并行计算余下互模糊函数,补全互模糊矩阵。两种方法都降低了直接定位数据传输量,提高了计算效率。性能分析和仿真实验表明本文两种方法精度性能优于两步定位方法,在低信噪比时两种方法都可达到比较理想的精度性能,在高信噪比时第2种方法与原始直接定位方法的精度性能相当。
[Abstract]:Aiming at the bottleneck of data transmission and computation in the original DPDs based on time difference frequency difference (TDOA), two decentralization direct localization methods are proposed. In the first method, a decentralization pairing scheme is adopted, in which the intercepted signals of each station are transmitted only once between the stations. The data transmission and computation are dispersed to the parallel computation of the mutual ambiguity function (CAFF) among the observational stations, and the mutual fuzzy matrix which satisfies only the full rank condition is constructed. The second method is based on the derived formula of the relationship between arbitrary mutual fuzzy functions. The reduction method is used to decentralize the remaining mutual fuzzy functions in parallel at each observation station to complement the total mutual fuzzy matrix. Both methods reduce the amount of direct location data transmission and improve the computational efficiency. The performance analysis and simulation results show that the accuracy performance of the two methods is better than that of the two-step positioning method, and the two methods can achieve ideal precision performance at low SNR. The accuracy of the second method is comparable to that of the original direct location method at high signal-to-noise ratio (SNR).
【作者单位】：西安电子科技大学电子信息攻防对抗与仿真技术教育部重点实验室;
【基金】：国家“973”计划(61**81) 国家“863”计划(2014AA80**086H) 中央高校基本科研业务费专项资金(JB140203)~~
【分类号】：TN95

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