一种基于多普勒频移比的交叉定位中虚假目标清除方法

清除由测向线交叉产生的虚假目标点是无源交叉定位的关键问题，目前已经有多种解决办法，如最小距离法、最大似然法和频谱相关法，但它们或是有效性低，或是计算量大，或是需要较难获得的先验知识。利用多普勒频移比清除双站测向交叉定位产生的虚假目标是一种新方法，这种方法只利用传感器接收到的目标频率，而无需获得目标的发射频率，也不需其它的先验知识，且计算较为简单。计算机仿真结果表明该方法有效。

A Method for Elimination of False Intersection Points Based on the Ratio of Doppler Shift in Passive Cross Location

Eliminating the false intersection points on direction finding lines for emitting sources is a key problem in passive cross location. Many methods, such as the least distance method, the maximum likelihood method and the spectrum correction method, for solving this problem have been developed in the past. But they have low validity, or more calculation complexity, or need some prior knowledge that is difficult to obtain. Eliminating the false intersection points based on the Ratio of Doppler Frequency Variety is a new method. This method requires the frequency that sensors have detected, but not the original frequency of targets and prior knowledge, and has low computation burden. Simulation results show that this method is effective.