Sub-Nyquist radar receiver based on photonics-assisted compressed sensing and cascaded dictionaries

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外文摘要：A sub-Nyquist radar receiver based on photonics-assisted compressed sensing is proposed.Cascaded dictionaries are applied to extract the delay and the Doppler frequency of the echo signals,which do not need to accumulate multiple echo periods and can achieve better Doppler accuracy.An experiment is performed.Radar echoes with different delays and Doppler frequencies are undersampled and successfully reconstructed to obtain the delay and Doppler information of the targets.Experimental results show that the average reconstruction error of the Doppler frequency is 5.33 kHz using an 8-μs radar signal under the compression ratio of 5.The proposed method provides a promising solution for the sub-Nyquist radar receiver.

外文关键词：

compressed sensingdictionary learningsub-Nyquist radarmicrowave photonicsDoppler frequency

作者：

刘诗扬、陈阳

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作者单位：

Shanghai Key Laboratory of Multidimensional Information Processing,East China Normal University,Shanghai 200241,China

Engineering Center of SHMEC for Space Information and GNSS,East China Normal University,Shanghai 200241,China

基金：

National Natural Science Foundation of China(NSFC)Natural Science Foundation of ShanghaiSongshan Laboratory Preresearch ProjectShanghai Aerospace Science and Technology Innovation FundScience and Technology Commission of Shanghai Municipality

项目编号：

6197119320ZR1416100YYJC072022006SAST202207422DZ2229004

出版年：

2024

DOI：

10.3788/COL202422.013902

中国光学快报(英文版)

中国光学学会中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD

影响因子：1.305

ISSN：1671-7694

年,卷(期)：2024.22(1)

参考文献量14