本文選題：雙基SAR + 高分辨寬測繪帶　； 參考：《電子與信息學(xué)報》2017年10期

【摘要】：雙基星載高分辨率寬測繪帶SAR系統(tǒng)(HRWS-SAR)利用數(shù)字波束形成技術(shù)(DBF)將俯仰向多通道的回波信號進(jìn)行快時間域的相干合成,DBF處理性能必然受到雙基構(gòu)型的影響。該文針對一般雙基構(gòu)型的星載HRWSSAR系統(tǒng),推導(dǎo)了點目標(biāo)接收方向角與收發(fā)距離和之間的線性近似表達(dá)式,建立了俯仰向通道的回波信號模型,進(jìn)而構(gòu)建了一種時變加權(quán)與FIR濾波相結(jié)合的DBF處理方法,并給出了系統(tǒng)實現(xiàn)框圖。該文對幾種典型雙基構(gòu)型的星載HRWS-SAR系統(tǒng)DBF處理進(jìn)行了仿真,結(jié)果表明合理的雙基構(gòu)型能有效提升星載HRWS-SAR系統(tǒng)的DBF處理性能。
[Abstract]:The performance of coherent synthesis of pitching multi-channel echo signals in fast time domain is bound to be affected by bistatic configuration by using digital beamforming (DBF) in a bistatic high resolution wide mapping band SAR system (HRWS-SAR).In this paper, the linear approximate expression between the receiving direction angle and the sum of the receiving distance of the point target is derived for the spaceborne HRWSSAR system with a general bistatic configuration, and the echo signal model of the pitching channel is established.Furthermore, a DBF processing method combining time-varying weighting with FIR filter is constructed, and the block diagram of the system is given.In this paper, several typical bistatic configurations of spaceborne HRWS-SAR system DBF processing are simulated. The results show that the reasonable bistatic configuration can effectively improve the DBF processing performance of spaceborne HRWS-SAR system.
【作者單位】： 合肥電子工程學(xué)院;
【基金】：安徽省自然科學(xué)基金(1508085MF119)~~
【分類號】：TN957.51
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本文編號：1751421