Research On Signal Deinterleaving Technology In Passive Radar For Air Defense

The threat faced with active radars gets more and more serious in modern warfare,and the ARM(anti-radiation missile)makes active radars hard to survive.Passive radar is also called inactive radar,which dose not radiate electromagnetic energy into space,working silently and covering larger region than radar,thus has strong capability of survival.Bv analyzing and processing received signals,passive radar can detect,locate,track and identify various emitters.Therefore,passive radar plays a significant role in modern EW.Signal deinterleaving indicates separating interleaved signals which come from different emitters,and it is one of the key signal processing tasks in modern passive radar systems.Only after accomplishing separating signals of each emitter from random interleaving pulse stream,signal parameters estimation and analysis,emitter identification and other succeeding processes are possible.With the abroad application and the rapid development of modern active radar technology,signal environment gets more and more complex and signal deinterleaving process becomes indispensable to passive radar systemx.The method of multilateral reception passive radar based on TDOA is briefly introduced in this paper.And the procedure of signal process sbusystem is described in detail in this paper.It's mainly inculding parameter measure,signal pre-processing and signal main-processing.This paper gives emphasis to engineering realization by a kind of real-time digital signal processor in the passive rada which is based on TDOA technique.This paper's discussion also includes the techniques which are used in signal analysis and processing,hihg- accurate-parameter measurement based on large scale FPGA and high speed DSP,the particular design of hardware in high speed real-timing signal deinterleaving,and so on.