利用多普勒信息的无源相干定位技术

Passive Coherent Location Technique Using Doppler Frequency Information

利用多普勒频率信息的第三方辐射源对动目标的无源相干定位技术，可获得高精度无模糊等优越的系统性能。在噪声环境中对动目标定位技术通常要求从系统的可观测性，估计性能，定位算法等方面时系统进行描述。文章基于两发一收的T^2／R无源相干定位系统。只利用多普勒频率信息时动目标进行状态估计，分析了系统的Cramer-Rao Bound（CRB）性能，并采用最大似然的估计算法对动目标进行定位。通过在数值单次与统计意义（Monte Carlo）上的仿真实验表明，利用多普勒频率信息的无源相干定位技术是可靠有效的。

The passive coherent location （PCL） technique of the third part transmitter to moving targets based on Doppler frequency information can achieve wonderful system performances such as high estimation accuracy and no time ambiguity. Under the noise condition, in order to locate the moving targets, the observability, the estimation performance and the location algorithm of the system are usually required to be described. In this paper, based on the two trausmitters and one receiver passive coherent location system, and using Doppler frequency information only, the status of moving targets are estimated. And the Cramer-Rao Bound （CRB） performance of system is analyzed. At last, the maximum likelihood estimation algorithm is adopted to locate the moving targets. The simulation results show the passive coherent location technique using Doppler frequency information is reliable and effective.