Orthogonal Frequency-Division Multiplexing (OFDM) radar is receiving increasing attention in the radar field in recent years and is showing excellent performance. However, for practical applications, there are several problems with phase-coded OFDM radar, such as the existence of few good codes, limited length capability, and a high Peak-to-Mean-Envelope Power Ratio (PMEPR). To address those problems, in this paper, we propose a design method for a four-phase-coded OFDM radar signal based on Bernoulli chaos, which can construct codes of arbitrary amounts and lengths and demonstrate more agility and flexibility. By adopting original phase weighting, this method can obtain a chaotic four-phase-coded OFDM signal with a PMEPR less than two. This signal has excellent performance with respect to high resolution and Doppler radar application.
霍 凯, 赵晶晶. 一种基于Bernoulli混沌的四相编码OFDM雷达信号设计方法[J]. 雷达学报, 2016, 5(4): 361-372.
Huo Kai, Zhao Jingjing. A Design Method of Four-phase-coded OFDM Radar Signal Based on Bernoulli Chaos. JOURNAL OF RADARS, 2016, 5(4): 361-372.
佟学俭, 罗涛. OFDM移动通信技术原理与应用[M]. 北京: 人民邮电出版社, 2003. Tong Xuejian and Luo Tao. The Principle and Application of OFDM Mobile Communication Technology[M]. Beijing: The People’s Posts and Telecommunications Press, 2003.
[2]
Jankiraman M, Wessels B J, and Van Genderen P. Design of a multifrequency FMCW radar[C]. The 28th European Microwave Conference,Amsterdam, The Netherland, 1998: 548-589.
[3]
Jankiraman M, Wessels B J, and Van Genderen P. Pandora multifrequency FMCW/SFCW radar[C]. IEEE National Radar Conference, Alexandria, VA, USA, 2000: 750-757.
[4]
Alimosaymer M and Mohseni R. Systematic approach in designing wavelet packet modulation-orthogonal frequency division multiplexing radar signal by applying the criterion of least-squares[J]. IET Signal Processing, 2014, 8(5): 475-482.
[5]
Sen S. Adaptive OFDM radar waveform design for improved micro-Doppler estimation[J]. IEEE Sensors Journal, 2014, 14(10): 3548-3556.
[6]
Sen S. PAPR-constrained pareto-optimal waveform design for OFDM-STAP radar[J]. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(6): 3658-3669.
[7]
Levanon N and Mozeson E. Radar Signals[M]. New York: John Wiley & Sons, Inc., Hoboken, 2004: 327-372.
[8]
李自琦, 梅进杰, 胡登鹏, 等. 限幅法降低OFDM雷达通信一体化系统PAPR研究[J]. 雷达科学与技术, 2014, 12(4): 406-410. Li Ziqi, Mei Jinjie, Hu Dengpeng, et al.. Research on deliberate clipping for PAPR reduction of integrated radar and communication systems based on OFDM signals[J]. Radar Science and Technology, 2014, 12(4): 406-410.
[9]
Huang Tianyao and Zhao Tong. Low PMEPR OFDM radar waveform design using the iterative least squares algorithm[J]. IEEE Signal Processing Letters, 2015, 22(11): 1975-1979.
[10]
Wang Wenqin, So H C, Huang Longting, et al.. Low peak-to-average ratio OFDM chirp waveform diversity design[C]. IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP),Florence, Italy, 2014: 8351-8354.
[11]
霍凯, 姜卫东, 黎湘, 等. 一种新的OFDM相位编码频率步进雷达信号及其特性[J]. 电子与信息学报, 2011, 33(3): 677-683. Huo Kai, Jiang Weidong, Li Xiang, et al.. A new OFDM phase-coded stepped-frequency radar signal and its characteristic[J]. Journal of Electronics & Information Technology, 2011, 33(3): 677-683.
[12]
Huo Kai, Deng Bin, Liu Yongxiang, et al.. Hign resolution range profile analysis based on multicarrier phase-coded waveforms of OFDM radar[J]. Chinese Journal of Systems Engineering and Electronics, 2011, 22(3): 421-427.
[13]
Levanon N. Multifrequency complementary phase-coded radar signal[J]. IEE Proceedings-Radar, Sonar and Navigation, 2000, 147(6): 276-284.
[14]
Levanon N. Multicarrier radar signals with low peak-to-mean envelope power ratio[J]. IEE Proceedings-Radar, Sonar and Navigation, 2003, 150(2): 71-77.
[15]
Sebt M A, Sheikhi A, and Nayebi M M. Orthogonal frequency-division multiplexing radar signal design with optimised ambiguity function and low peak-to-average power ratio[J]. IET Radar, Sonar & Navigation, 2009, 3(2): 122-132.
[16]
Alimosaymer Mostafa and Mohseni Reze. Systematic approach in designing wavelet packet modulation-orthogonal frequency division multiplexing radar signal by applying the criterion of least squares[J]. IET Signal Processing, 2014, 8(5): 475-482.
[17]
Guo T and Qiu R. OFDM waveform design compromising spectral nulling, side-lobe suppression and range resolution[C]. IEEE Radar Conference, Cincinnati, USA, 2014: 1424-1429.
[18]
Harman S and Qineti Q. The Diversity of Chaotic Waveforms in Use and Characteristics[M]. UK: IET Michael Faraday House, 2009: 33-39.
[19]
丁凯. 混沌信号合成孔径雷达研究[D]. [博士论文], 中国科学院电子学研究所, 2009. Ding Kai. Researches on chaotic signal synthetic aperture radar[D]. [Ph.D. dissertation], Institute ofElectronics, Chinese Academy of Sciences, 2009.
[20]
Huang Qiongdan, Li Yong, Cheng Wei, et al.. A new multicarrier chaotic phase coded stepped-frequency pulse train radar signal and its characteristic analysis[C]. IEEE 10th Conference on Industrial Electronics and Applications, Auckland, New Zealand, 2015: 444-448.
Li T Y and Yorke J A. Period three implies chaos[J]. The American Mathematical Monthly, 1975, 82(10): 985-992.
[23]
Ruggiano M and Van Genderen P. Radar and communication waveform: wideband ambiguity function and narrowband approximation[C]. IET Conference Publications, Edinburgh, UK, 2007: 1-5.
