PRF可變的星載方位向多相位中心多波束SAR
Displaced Phase Centers Multibeam in Azimuth with PRF Alterable Mode of Spaceborne Synthetic Aperture Radar (SAR)
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摘要: 方位向多相位中心多波束(DPCA)SAR可以解決測(cè)繪帶寬和分辨率之間的矛盾,但嚴(yán)格限制了對(duì)脈沖重復(fù)頻率(PRF)的選擇。該文分析了方位向信號(hào)的頻譜,給出了當(dāng)PRF偏離理想值時(shí)均勻采樣方位譜的重構(gòu)方法,提出了PRF可變的DPCA模式。計(jì)算機(jī)仿真驗(yàn)證了新模式的正確性。
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關(guān)鍵詞:
- 合成孔徑雷達(dá)（SAR）; 多波束; 寬測(cè)繪帶; 高分辨率; 非均勻采樣
Abstract: SAR with Displaced Phase Centers multibeam in Azimuth (DPCA) can solve the confliction between swath width and resolution, but this mode is one Pulse Repetition Frequency (PRF) restriction. In this paper, the spectrum of the signal in the azimuth direction is analyzed, and the reconstruction method of the uniform spectrum in azimuth is given when PRF deviated from the ideal PRF. DPCA with PRF alterable mode is introduced. The simulation of point target is used to analyze the effect of this new method. -
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