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Dechirping Compression Method for Nonlinear Frequency Modulation Waveforms
Liu, Jiafang1; Zhang, Yunhua2; Dong, Xiao3
Department微波遥感部
Source PublicationIEEE Geoscience and Remote Sensing Letters
2018
DOI10.1109/LGRS.2018.2875893
ISSN1545-598X
Language英语
Abstract

This letter proposes a novel dechirp processing method for wideband nonlinear frequency modulation (NLFM) waveform which enables low sampling rate of data. As we know, NLFM waveform can easily realize optimal shape of power spectral density which helps to achieve better pulse compression result with low range sidelobes without signal-to-noise ratio degradation caused by weighting as we usually do for LFM waveforms. In the approach, hamming window is adopted in the generation of the NLFM waveform for better balance on the low range sidelobes and a relative small bandwidth. In dechirp operation, the NLFM radar echoes are mixed with a local reference LFM signal, and thus narrowband signals are resulted and only low sampling rate is needed. The dechirped NLFM signals are then up-sampled and inverse dechirped by software and finally matched filtering is conducted to complete pulse compression. Both numerically simulated data and real radar data are processed to verify the effectiveness of the proposed method. IEEE

Indexed BySCI ; EI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6557
Collection微波遥感部
Affiliation1.Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China, and also with the University of Chinese Academy of Sciences, Beijing 100049, China (e-mail: jiafangliu@163.com).;
2.Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China, and also with the University of Chinese Academy of Sciences, Beijing 100049, China.;
3.Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China.
Recommended Citation
GB/T 7714
Liu, Jiafang,Zhang, Yunhua,Dong, Xiao. Dechirping Compression Method for Nonlinear Frequency Modulation Waveforms[J]. IEEE Geoscience and Remote Sensing Letters,2018.
APA Liu, Jiafang,Zhang, Yunhua,&Dong, Xiao.(2018).Dechirping Compression Method for Nonlinear Frequency Modulation Waveforms.IEEE Geoscience and Remote Sensing Letters.
MLA Liu, Jiafang,et al."Dechirping Compression Method for Nonlinear Frequency Modulation Waveforms".IEEE Geoscience and Remote Sensing Letters (2018).
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