Stepped frequency chirp signal SAR imaging

被引：5
|
作者：
Dang Hongxing [1 ]
机构：
[1] E China Res Inst Elect Engn, Hefei 230031, Peoples R China
来源：
2007 1ST ASIAN AND PACIFIC CONFERENCE ON SYNTHETIC APERTURE RADAR PROCEEDINGS | 2007年
关键词：
stepped frequency chirp signal; phase incoherent factor; contract optimization; bandwidth reconstruction;
D O I：
10.1109/APSAR.2007.4418544
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
To achieve high range resolution, using the stepped frequency chirp signal, two or more chirp waveforms are sequentially transmitted and received at stepped carrier frequencies in the whole bandwidth. An advantage of the approach has no increase in instantaneous bandwidth of the radar system. In this paper phase incoherent factor among sub pulses trains produced by down frequency conversion mixer is put forward and analyzed. Which must be took into account when range bandwidth synthesis is processed. Frequency domain bandwidth synthesis is applied to SAR imaging combining with the phase incoherent factor estimate and compensation based on contract optimization autofocusing. Simulation results show the validity of the method.
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页码：14 / 18
页数：5
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