Angle Resolution And Angle Tracking For Multiple Source Signals

Anti-Radiation Radar Seeker (ARRS) is one of important military research projects. Its technical performance directly influences the attack effect of Anti-Radiation Missile (ARM). Due to its wide operating frequency range and its restricted antenna aperture by missile diameter, the angular resolving power of ARRS is limited. It is difficult to make seeker resolve angle of arrival and track the desired source in multiple source signal environment. This paper is focused on research of algorithm for angle resolution and tracking of ARRS to multiple source signals.In this paper, a detailed research is firstly given on the method of angle resolution of ARRS to multiple source signals. A method combining PRF Tracking with Cluster Analysis is presented for ARM seeker to resolve angles of arrival of multiple pulse emitter sources. For the spatial identification of unresolved radar jamming, especially multiple noise frequency-modulated jammers overlapped within time domain and frequency domain, this paper analyses the response character of receiver to jamming source. By studying statistic response character and influence on measuring angle, a new method for angular resolution is put forward based on clustering analysis and spatial filter. Applied to ARRS 's tracking process to two jammers, this method is proved to be reliable and effective by simulation result, and the angular resolving capacity for multiple targets is greatly improved. In addition, some practical problems encounted in the process of angle resolution and tracking to multiple source signals, such as sidelobe and multipath recognition, tracking to glint jammers, are analyzed and disposed.