Fractional-delay Clutter Estimation for Passive Radar Based on Compressive Sensing
YANG Pengcheng①②③ LU Xiaode①② CHAI Zhihai①②③ ZHANG Dan①②③ YUE Qi①②③ YANG Jingmao①②③
①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ②(National Key Laboratory of Science and Technology on Microwave Imaging, Beijing 100190, China) ③(University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract:Signal-Clutter-Ratio (SCR) in reference channel is an important parameter for the evaluation of integration loss of passive radar. When PN sequence in the Digital Terrestrial Television Broadcast (DTTB) illuminator is utilized for SCR estimation, there will be the problem of fractional-delay received signal relative to local PN sequence, which leads to a severe deviation of SCR estimation. For this problem, a novel algorithm based on compressive sensing is proposed by exploiting the sparsity of signal in delay dimension. Simulation demonstrates that accurate estimation of delay and strength for signals of different strength can be obtained by the proposed algorithm, which ensures the accuracy of SCR estimation. The processing of experimental data shows that the whole SCR in the received data is relatively high and the integration loss is trivial, about 0.5 dB. In addition, SCR decreases with the length of baseline, which leads to the increase of integration loss.
杨鹏程,吕晓德,柴致海, 张丹,岳琦, 杨璟茂,. 基于压缩感知的外辐射源雷达分数阶杂波估计[J]. 电子与信息学报, 2017, 39(11): 2716-2723.
YANG Pengcheng, LU Xiaode, CHAI Zhihai, ZHANG Dan, YUE Qi, YANG Jingmao. Fractional-delay Clutter Estimation for Passive Radar Based on Compressive Sensing. JEIT, 2017, 39(11): 2716-2723.
GRIFFITHS H and BAKER C. Passive coherent location radar systems. Part 1: Performance prediction[J]. IEE Proceedings-Radar, Sonar and Navigation, 2005, 152(3): 153-159. doi: 10.1049/ip-rsn:20045082.
GAO Zhiwen and TAO Ran. Computation and analysis of coherent accumulation gain for passive radar[J]. Acta Electronica Sinica, 2008, 36(6): 1227-1230. doi: 10.3321/ j.issn:0372-2112.2008.06.038.
ZHAO Yongke. Research on effects and reconstructing algorithm of reference signal for passive coherent radar[D]. [Master dissertation], University of Chinese Academy of Sciences, 2014: 37-39.
FENG Yuan. Research on algorithms of reference signal acquisition and interference suppression in DTTB based passive radar[D]. [Ph.D. dissertation], Beijing Institute of Technology, 2014: 11-13.
[5]
BACZYK M K, KULPA K, SAMCZYNSKI P, et al. The impact of reference channel SNR on targets detection by passive radars using DVB-T signals[C]. 2015 IEEE Radar Conference, Arlington, USA, 2015: 708-712. doi: 10.1109/ RADAR.2015.7131088.
WAN Xianrong, CEN Bo, YI Jianxin, et al. Reference signal extraction methods for CMMB-based passive bistatic radar [J]. Journal of Electronics & Information Technology, 2012, 34(2): 338-343. doi: 10.3724/SP.J.1146.2011.00572.
[7]
WANG F. Direct signal recovery and masking effect removal exploiting sparsity for passive bistatic radar[C]. IET International Radar Conference, Hangzhou, China, 2015: 1-6. doi: 10.1049/cp.2015.0969.
[8]
JIANG L, FENG T, ZHANG W, et al. The direct wave purifying based on WIFI signal for passive radar[J]. Wireless Communications, Networking and Applications, 2016, 348: 223-234. doi: 10.1007/978-81-322-2580-5_22.
ZHU Jiabing and HONG Yi. A direct-path-wave purified approach to passive radar based on cepstrum technique[J]. Modern Radar, 2007, 29(8): 75-78. doi: 10.3969/j.issn.1004- 7859.2007.08.021.
SAC(Standardization Administration of the People’s Republic of China). GB: 20600-2006. Framing Structure, Channel Coding and Modulation for Digital Television Terrestrial Broadcasting System[S]. 2006.
[11]
DONOHO D L. Compressed sensing[J]. IEEE Transactions on Information Theory, 2006, 52(4): 1289-1306. doi: 10.1109/ TIT.2006.871582.
WANG Haitao, WANG Wei, and FU Weibo. Target detection and DOA estimation for based compressed sensing-based passive radar[J]. Journal of Air Force Early Warning Academy, 2015, 29(4): 246-250. doi: 10.3969/j.issn.2095-5839.2015. 04.004.
[13]
LU Xiaode, YANG Pengcheng, LI Daojing, et al. Interference cancellation based on compressive sensing for passive coherent radar (PACOR)[C]. 2015 IEEE Radar Conference, Arlington, USA, 2015. doi: 10.1109/RADAR.2015.7131055.
YANG Pengcheng, LU Xiaode, LI Jichuan, et al. Target detection for passive radar using compressive sensing[J]. Radar Science and Technology, 2015, 13(4): 384-389. doi: 10.3969/j.issn.1672-2337.2015.04.009.
[15]
CHEN S S, DONOHO D L, and SAUNDERS M A. Atomic decomposition by basis pursuit[J]. SIAM Journal on Scientific Computing, 1998, 20(1): 33-61.
[16]
TROPP J A and GILBERT A C. Signal recovery from random measurements via orthogonal matching pursuit[J]. IEEE Transactions on Information Theory, 2007, 53(12): 4655-4666.