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SYNTHETIC BANDWIDTH METHOD AND EXPERIMENTAL RESEARCH BASED ON A WIDEBAND MULTI-CHANNEL SAR
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作者 Jia Yingxin Wang Yanfei 《Journal of Electronics(China)》 2013年第2期130-137,共8页
Synthetic bandwidth technique is used to increase frequency bandwidth of the system and provides an effective way to achieve the ultra high resolution in the field of Synthetic Aperture Radar (SAR). But in the actual ... Synthetic bandwidth technique is used to increase frequency bandwidth of the system and provides an effective way to achieve the ultra high resolution in the field of Synthetic Aperture Radar (SAR). But in the actual SAR system, the synthesis result will be seriously deteriorated by the inner-channel and inter-channel phase error. A frequency domain synthetic bandwidth method based on transfer function extracting technique is proposed in an actual SAR system which consists of single wideband transmit channel and 8-way down-conversion receive sub-channels. The method can accurately get the amplitude and phase characteristics of the sub-channel and compensate the amplitude-phase errors. The final experimental results demonstrate the validity and feasibility of the method and the range resolution down to 0.1 m is obtained. 展开更多
关键词 synthetic Aperture Radar (SAR) synthetic bandwidth Amplitude-phase errors
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Ultra-high resolution microwave photonic radar with post-bandwidth synthesis 被引量:3
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作者 Cong Ma Hao Chen +2 位作者 Xingwei Ye Xiangchuan Wang Shilong Pan 《Chinese Optics Letters》 SCIE EI CAS CSCD 2020年第7期102-106,共5页
We demonstrate microwave photonic radar with post-bandwidth synthesis, which can realize target detection with ultra-high range resolution using relatively small-bandwidth radio frequency(RF) frontends. In the propose... We demonstrate microwave photonic radar with post-bandwidth synthesis, which can realize target detection with ultra-high range resolution using relatively small-bandwidth radio frequency(RF) frontends. In the proposed radar, two temporal-overlapped linear frequency-modulated(LFM) signals with the same chirp rate and different center frequencies are transmitted. By post-processing the de-chirped echoes in the receiver, a signal equivalent to that de-chirped from an LFM signal with the combined bandwidth is achieved. In a proof-ofconcept experiment, two LFM signals with bandwidths of 8.4 GHz are exploited to achieve radar detection with an equivalent bandwidth of 16 GHz, and a range resolution of 1 cm is obtained. 展开更多
关键词 microwave photonics ultra-high resolution synthetic bandwidth
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