Orthogonal Frequency Division-Linear Frequency Modulation (OFD-LFM) signal is widely used in Multiple Input Multiple Output (MIMO) radar systems. For solving the problems of the auto-correlation sidelobes of the spatial synthesized signals, an analysis is made of the inherent sidelobe property. Furthermore, OFD-LFM with various frequency steps is proposed and the waveform design method is given. The optimization model is established based on the temporal property and spatial property jointly. Then, the frequency steps and initial phases are optimized by Sequential Quadratic Programming (SQP). The transmitted power of the designed waveform is approximately equal in all directions, and the spatial synthesized signals have good correlation properties.
李慧,赵永波,冯大政,程增飞. 非均匀间隔OFD-LFM的MIMO雷达波形设计[J]. 电子与信息学报, 2016, 38(4): 927-933.
LI Hui, ZHAO Yongbo, FENG Dazheng, CHENG Zengfei. MIMO Radar Waveform Design for OFD-LFM with Various Frequency Steps. JEIT, 2016, 38(4): 927-933.
LI J and STOICA P. MIMO radar with colocated antennas [J]. IEEE Signal Processing Magazine, 2007, 24(5): 106-114. doi:10.1109/MSP.2007.904812.
[2]
DENG H. Polyphase code design for the orthogonal netted radar systems[J]. IEEE Transactions on Signal Processing, 2004, 52(11): 3126-3135. doi:10.1109/TSP.2004.836530.
[3]
LIU B, HE Z S, and HE Q. Optimization of orthogonal discrete frequency-coding waveform based on modified genetic algorithm for MIMO radar[C]. Proceedings of the International Conference on Communication, Circuits and Systems, Kokura, 2007: 966-970. doi:10.1109/ICCCAS.2007. 4348208.
[4]
MEHANY W, JIAO L C, and HUSSIEN K. Orthogonal discrete frequency-coding waveform design based on modified genetic algorithm for MIMO-SAR[C]. Proceedings of IEEE 9th Conference on Industrial Electronics and Applications (ICIEA), Hangzhou, 2014: 1082-1086. doi:10.1109/ICIEA. 2014.6931325.
[5]
HE H, STOICA P, and LI J. Designing unimodular sequence sets with good correlations—including an application to MIMO radar[J]. IEEE Transactions on Signal Processing, 2009, 57(11): 4391-4405. doi: 10.1109/TSP.2009.2025108.
[6]
BABUR G, KRASNOV O A, YAROVOY A, et al. Nearly orthogonal waveforms for MIMO FMCW radar[J]. IEEE Transactions on Aerospace and Electronic Systems, 2013, 49(3): 1426-1437. doi:10.1109/TAES.2013.6557996.
HU L B, LIU H W, and WU S J. Orthogonal waveform design for MIMO radar via constrained nonlinear programming[J]. Systems Engineering and Electronics, 2011, 33(1): 64-68. doi: 10.3969/j.issn.1001-506X.2011.01.13.
[8]
YANG J, QIU Z K, JIANG W D, et al. Poly-phase codes optimization for multi-input multi-output radars[J]. IET Signal Processing, 2013, 7(2): 93-100. doi:10.1049/iet-spr. 2012.0195.
[9]
YANG J, WANG H Q, JIANG W D, et al. Complementary- based chaotic phase-coded waveforms design for MIMO radar[J]. IET Radar, Sonar & Navigation, 2013, 7(4): 371-382. doi:10.1049/iet-rsn.2012.0123.
ZHAO Y N, ZHANG T, LI F C, et al. Optimal waveform design for MIMO radar via alternating projection[J]. Journal of Electronics & Information Technology, 2014, 36(6): 1368-1373. doi: 10.3724/SP.J.1146.2013.01198.
DU X L, SU T, WANG X, et al. Golay complementary sequence with space time coding for MIMO radar waveform design[J]. Journal of Electronics & Information Technology, 2014, 36(8): 1966-1971. doi: 10.3724/SP.J.1146.2013.01524.
[12]
ZHOU S H, LIU H W, WANG X, et al. MIMO radar range- angular-doppler sidelobe suppression using random space- time coding[J]. IEEE Transactions on Aerospace and Electronic Systems, 2014, 50(3): 2047-2060. doi:10.1109/ TAES.2013.120681.
[13]
LIU B. Orthogonal discrete frequency-coding waveform set design with minimized autocorrelation sidelobes[J]. IEEE Transactions on Aerospace and Electronic Systems, 2009, 45(4): 1650-1657. doi:10.1109/TAES.2009.5310326.
[14]
GAO C C, TEH K C, and LIU A F. Orthogonal frequency diversity waveform with range-doppler optimization for MIMO radar[J]. IEEE Signal Processing Letters, 2014, 21(10): 1201-1205. doi:10.1109/LSP.2014.2329944.
[15]
WANG W Q, SO H C, HUANG L T, et al. Low peak-to- average ratio OFDM chirp waveform diversity design[C]. Proceedings of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Florence, 2014: 8351-8354. doi:10.1109/ICASSP.2014.6855230.
[16]
WANG W Q. Large time-bandwidth product MIMO radar waveform design based on chirp rate diversity[J]. IEEE Sensors Journal, 2015, 15(2): 1027-1034. doi:10.1109/JSEN. 2014.2360125.
LIU B, HAN C L, and MIAO J H. OFD-LFM signal design and performance analysis for MIMO radar[J]. Journal of University of Electronic Science and Technology of China, 2009, 38(1): 28-31.
ZHAO Y B, SHUI P L, LIU H W, et al. Waveform design for synthetic impulse and aperture radar based on LFM signals [J]. Acta Electronica Sinica, 2010, 38(9): 2076-2082.