| In modern warfare, it requires the radar having adequate processing speed on echo to realize accurate and fast search & track on multi-targets, meanwhile, it also requires the radar performing processing, judgment and data transmission in all the information within the echo to realize attack by guiding artillery and missile. Along with the development of ECM and target stealth technology, besides countering ground, sea and weather clutter, it requires the radar having capability of extracting useful small target under all kinds of contrived electronics jamming so as to keep good matching status between radar and battlefield. Thus, the radar should adopt a "high sensitivity, multi-function and adaptive" signal processing system.Moreover, along with rapid progress of DSP, VLSC digital circuit, computer and communication technology, some adaptive arithmetic that previously restricted by hardware conditions can be easily realized into engineering. So, the signal processing system can burden more adaptive processing tasks in time domain, frequency domain and even in airspace real-time processing to greatly enhance system performance.This article is based on the scientific research task that borne by the author. It takes the signal processing system of ground based intelligence radar as the demonstration object, and strives to configure the actual signal processor that satisfies the requirement of modern warfare. According to system demonstration structure, this article begins with description of suitable signal type for different operational requirements, then following the flow of signal processing, the operation principle and engineering implementation of each subunit of signal processor are presented, such as (A/D converter(ADC), pulse compression(PC), digital moving target indication(DMTI), adaptive side-lobe cancellation(ASLC), side-lobe blanking(SLB), constant false alarm rate(CFAR), target extraction and clutter map. After demonstration, the reasonable operation parameter is selected, thus a complete signal processing system is established. |
