Phase-Coded Orthogonal Frequency Division Multiplexing (PC-OFDM) radar has drawn wide attention in high resolution radar application. This kind of radar signal transmits orthogonal sub-carriers phase-modulated by specific sequences and has range and Doppler high resolution at the same time. Considering its sensitivity to Doppler offset, this paper derives the pulse compression method of PC-OFDM radar, and based on Cyclic Prefix (CP), a Doppler offset estimation and compensation algorithm is proposed. Several simulations verify the effectiveness of the method in improving High Resolution Range Profile (HRRP) with Doppler offset.
JANKIRAMAN M, WESSELS B J, and VAN GENDEREN P. Design of a multifrequency FMCW radar[C]. The 28th European Microwave Conference, Amsterdam, 1998: 548-589. doi: 10.1109/EUMA.1998.338053.
[2]
LEVANON N. Multifrequency complementary phase-coded radar signal[J]. IEE Proceedings-Radar, Sonar and Navigation, 2000, 147(6): 276-284. doi: 10.1049/ip-rsn 20000734.
[3]
LEVANON N. Train of diverse multifrequency radar pulses [C]. Proceedings of the IEEE International Radar Conference, Atlanta, GA, 2001: 93-98. doi: 10.1109/NRC.2001.922958.
[4]
FINK J and JONDRAL F K. Comparison of OFDM radar and chirp sequence radar[C]. 16th International Radar Symposium, Dresden, Germany, 2015: 315-320. doi: 10.1109/ IRS.2015.7226369.
ZHAO Zhixin, WAN Xianrong, XIE Rui, et al. Impact of carrier frequency offset on passive bistatic radar with orthogonal frequency division multiplexing waveform[J]. Journal of Electronics & Information Technology, 2013, 35(4): 871-876. doi: 10.3724/SP.J.1146.2012.01011.
[6]
LELLOUCH G, MISHRA A, and INGGS M. Impact of the Doppler modulation on the range and Doppler processing in OFDM radar[C]. IEEE Radar Conference, Cincinnati, 2014: 803-808. doi: 10.1109/GEMCCON.2015.7386829.
[7]
DENG Bin, SUN Bin, WEI Xizhang, et al. A velocity estimation method for multi carrier phase-coded radar[C]. 2nd International Conference on Information Management and Engineering, Chengdu, China, 2010, 4: 227-230. doi: 10.1109/ICIME.2010.5478067.
[8]
LIM Jinsoo, KIM Sungrae, and SHIN Dongjoon. Two-step Doppler estimation based on intercarrier interference mitigation for OFDM radar[J]. IEEE Antennas and Wireless Propagation Letters, 2015, 14: 1726-1729. doi: 10.1109/ LAWP.2015.2421054.
[9]
TURLAPATY Anish, JIN Yuanwei, and XU Yang. Range and velocity estimation of radar targets by weighted OFDM modulation[C]. IEEE Radar Conference, Cincimnati, 2014: 1358-1362.
[10]
KASHIN V A and MAVRYCHEV E A. Target velocity
estimation in OFDM radar based on subspace approaches[C]. 14th International Radar Symposium, Dresden, 2013: 1061-1066.
[11]
GU Wenkun, WANG Dangwei, and MA Xiaoyan. High speed moving target detection using distributed OFDM-MIMO phased radar[C]. 12th International Conference on Signal Processing, Hangzhou, China, 2014: 2087-2091. doi: 10.1109/ ICOSP.2014.7015362.
WANG Jie, LIANG Xingdong, DING Chibiao, et al. Investigation on the Doppler compensation in OFDM SAR[J]. Journal of Electronics & Information Technology, 2013, 35(12): 3037-3040. doi: 10.3724/SP.J.1146.2012.01547.
[13]
LIU Yongxiang, ZHANG Shuanghui, ZHU Dekang, et al. A novel speed compensation method for ISAR imaging with low SNR[J]. Sensor, 2015, 15(8): 18402-18415. doi: 10.3390/ s150818402.
[14]
ZHANG Tianxian and XIA Xianggen. OFDM synthetic aperture radar imaging with sufficient cyclic prefix[J]. IEEE Transactions on Geoscience and Remote Sensing, 2015, 53(1): 394-404. doi: 10.1109/TGRS.2014.2322813.
[15]
CAO Yunhe and XIA Xianggen. IRCI-free MIMO-OFDM SAR using circularly shifted Zadoff- Chu sequences[J]. IEEE Geoscience and Remote Sensing Letters, 2015, 12(5): 1126-1130. doi: 10.1109/LGRS.2014.2385693.
[16]
BEEK VAN DE J J, SANDELL M, ISAKSSON M, et al. Low complex frame synchronization in OFDM systems[C]. Proceedings of the IEEE International Coference on Universal Personal Communications, 1995: 982-986. doi: 10.1109/ICUPC.1995.497156.
HUO Kai and ZHAO Jingjing. A design method of four- phase-coded OFDM radar signal based on Bernoulli chaos[J]. Journal of Radars, 2016, 5(4): 361-372. doi: 10.12000/ JR16050.
