NSSC OpenIR  > 微波遥感部
Interferometric SAR imaging by transmitting stepped frequency chaotic noise signals
Zhang, Yunhua; Gu, Xiang; Zhai, Wenshuai; Dong, Xiao; Shi, Xiaojin; Kang, Xueyan; Zhang, YH (reprint author), Chinese Acad Sci, Key Lab Microwave Remote Sensing, POB 8701, Beijing 100190, Peoples R China.
Department微波遥感部
Source PublicationSAR IMAGE ANALYSIS, MODELING, AND TECHNIQUES XV
2015
Pages96420M
Language英语
ISSN0277-786X
ISBN978-1-62841-852-1
AbstractNoise radar has been applied in many fields since it was proposed more than 50 years ago. However, it has not been applied to interferometric SAR imaging yet as far as we know. This paper introduces our recent work on interferometric noise radar. An interferometric SAR system was developed which can transmit both chirp signal and chaotic noise signal (CNS) at multiple carrier frequencies. An airborne experiment with this system by transmitting both signals was carried out, and the data were processed to show the capability of interferometric SAR imaging with CNS. The results shows that although the interferometric phase quality of CNS is degraded due to the signal to noise ratio (SNR) is lower compared with that of chirp signal, we still can get satisfied DEM after multi-looking processing. Another work of this paper is to apply compressed sensing (CS) theory to the interferometric SAR imaging with CNS. The CS theory states that if a signal is sparse, then it can be accurately reconstructed with much less sampled data than that regularly required according to Nyquist Sampling Theory. To form a structured random matrix, if the transmitted signal is of fixed waveform, then random subsampling is needed. However, if the transmitted signal is of random waveform, then only uniform subsampling is needed. This is another advantage of noise signal. Both the interferometric phase images and the DEMs by regular method and by CS method are processed with results compared. It is shown that the degradation of interferometric phases due to subsampling is larger than that of amplitude image.
KeywordInterferometric Sar Noise Radar Interferometric Phase Digital Elevation Model Stepped Frequency Chaotic Noise Signal Compressive Sensing Subsampling
Conference NameConference on SAR Image Analysis, Modeling, and Techniques XV
Conference DateSEP 23-24, 2015
Conference PlaceToulouse, FRANCE
Indexed ByEI ; CPCI
Document Type会议论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5368
Collection微波遥感部
Corresponding AuthorZhang, YH (reprint author), Chinese Acad Sci, Key Lab Microwave Remote Sensing, POB 8701, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Zhang, Yunhua,Gu, Xiang,Zhai, Wenshuai,et al. Interferometric SAR imaging by transmitting stepped frequency chaotic noise signals[C],2015:96420M.
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