基于非匹配滤波的SAR通信一体化技术

doi:10.7523/j.ucas.2022.085

摘要/Abstract

摘要： 一体化波形设计是雷达通信一体化技术实现的关键，正交频分复用(OFDM)信号更是被视为最具应用潜力的一体化波形信号。然而，OFDM一体化信号在实际应用中存在如下问题：在匹配滤波框架下，OFDM一体化信号中包含的通信信号导致二维模糊函数出现高旁瓣和伪峰，影响合成孔径雷达(SAR)成像性能；OFDM一体化信号具有较高的峰均功率比(PAPR)值，无法充分发挥功放的线性放大性能，进而影响探测距离和通信性能。针对上述问题，将基于循环前缀的非匹配滤波成像算法应用到一体化信号处理中，同时提出基于离散傅里叶变换预编码的一体化信号设计方法，消除通信信号对成像性能的影响，并将信号的PAPR值控制在可接受范围内，实现了SAR成像和通信性能的良好兼容。最后通过实验证明了所提方法的有效性。

关键词: 雷达通信一体化, OFDM一体化信号, 非匹配滤波的成像算法, 距离旁瓣抑制, 峰均功率比

Abstract: Integrated waveform design is the key to the realization of radar communication integration technology. Orthogonal frequency division multiplexing (OFDM) signal is regarded as the most potentially integrated waveform signal. However, the OFDM integrated signal has the following problems in practical application: under the framework of matched filtering, the communication signals contained in the OFDM integrated signal lead to high sidelobes and pseudo peaks in the two-dimensional fuzzy function, which affects the performance of synthetic aperture radar (SAR) imaging. OFDM integrated signal has a high peak-to average power ratio (PAPR), which can not give full play to the linear amplification performance of the power amplifier, and then affect the detection range and communication performance. Aiming at the above problems, this paper applies the CP (cyclic prefix)-based unmatched filter imaging algorithm to integrated signal processing and proposes an integrated signal design method based on discrete fourier transform (DFT) precoding to eliminate the influence of communication signals on imaging performance. The PAPR of the signal is controlled within an acceptable range to achieve good compatibility between SAR imaging and communication performance. Finally, the effectiveness of the proposed method is proved by experiments.

Key words: joint radar and communication, OFDM-based integrated signal, imaging algorithms based on unmatched filtering, distance sidelobe suppression, peak-to-average power ratio

中图分类号:

TN95

孙文, 孙吉利, 卢虹良. 基于非匹配滤波的SAR通信一体化技术[J]. 中国科学院大学学报, 2024, 41(3): 387-397.

SUN Wen, SUN Jili, LU Hongliang. SAR-communication integration technology under the framework of unmatched filtering[J]. Journal of University of Chinese Academy of Sciences, 2024, 41(3): 387-397.

参考文献

[1] 雍萍, 王杰, 葛俊祥. 基于失配处理的OFDM雷达通信一体化共享信号旁瓣抑制技术[J]. 信号处理, 2020, 36(10): 1698-1707. DOI:10.16798/j.issn.1003-0530.2020.10.009.
[2] 梁兴东, 李强, 王杰, 等. 雷达通信一体化技术研究综述[J]. 信号处理, 2020, 36(10):1615-1627. DOI:10.16798/j.issn.1003-0530.2020.10.001.
[3] 杨熙, 戎华, 王君可. 雷达-电子战-通信一体化系统雷达侦察作战效能模型研究[J]. 科技信息, 2014(13): 220-221. DOI:10.3969/j.issn.1001-9960.2014.13.155.
[4] 刘永军, 廖桂生, 杨志伟. 基于OFDM的雷达通信一体化波形模糊函数分析[J]. 系统工程与电子技术, 2016, 38(9): 2008-2018. DOI:10.3969/j.issn.1001-506X.2016.09.07.
[5] 曾瑞琪, 刘方正, 姜秋喜, 等. 雷达通信一体化的六种主要技术体制[J]. 现代雷达, 2019, 41(2): 10-14, 30. DOI:10.16592/j.cnki.1004-7859.2019.02.003.
[6] Moghaddasi J, Wu K. Multifunctional transceiver for future radar sensing and radio communicating data-fusion platform[J]. IEEE Access, 2016, 4: 818-838. DOI:10.1109/ACCESS.2016.2530979.
[7] Ren P, Munari A, Petrova M. Performance analysis of a time-sharing joint radar-communications network[C]//2020 International Conference on Computing, Networking and Communications (ICNC). Big Island, HI, USA. IEEE, 2020: 908-913. DOI:10.1109/ICNC47757.2020.9049687.
[8] Reichardt L, Sturm C, Grünhaupt F, et al. Demonstrating the use of the IEEE 802.11P car-to-car communication standard for automotive radar[C]//2012 6th European Conference on Antennas and Propagation (EUCAP). Prague, Czech Republic. IEEE, 2012: 1576-1580. DOI:10.1109/EuCAP.2012.6206084.
[9] 李晓柏, 杨瑞娟, 程伟. 基于频率调制的多载波Chirp信号雷达通信一体化研究[J]. 电子与信息学报, 2013, 35(2): 406-412. DOI:10.3724/SP.J.1146.2012.00567.
[10] Chen X, Feng Z Y, Wei Z Q, et al. Code-division OFDM joint communication and sensing system for 6G machine-type communication[J]. IEEE Internet of Things Journal, 2021, 8(15): 12093-12105. DOI:10.1109/JIOT.2021.3060858.
[11] Liu F, Masouros C, Li A, et al. MU-MIMO communications with MIMO radar: from Co-existence to joint transmission[J]. IEEE Transactions on Wireless Communications, 2018, 17(4): 2755-2770. DOI:10.1109/TWC.2018.2803045.
[12] 田团伟, 邓浩, 鲁建华, 等. 智能反射面辅助雷达通信双功能系统的多载波波形优化方法[J]. 雷达学报, 2022, 11(2): 240-254. DOI:10.12000/JR21138.
[13] 伍光新, 姚元, 祁琳琳. 雷达通信波形一体化发展综述[J]. 现代雷达, 2021, 43(9): 37-45. DOI:10.16592/j.cnki.1004-7859.2021.09.007.
[14] 姜孟超, 廖桂生, 杨志伟, 等. 一种NLFM-CPM雷达通信一体化信号设计[J]. 系统工程与电子技术, 2019, 41(1): 35-42. DOI:10.3969/j.issn.1001-506X.2019. 01.06.
[15] 周宇, 杨慧婷, 谷亚彬,等. 基于调频率调制的雷达通信共享信号研究[J]. 电子科技大学学报, 2017, 46(6): 830-835. DOI:10.3969/j.issn.1001-0548.2017.06.006.
[16] 王小江, 张贞凯. 多符号OFDM雷达通信一体化波形优化设计方法[J]. 电光与控制, 2021, 28(7): 83-87. DOI:10.3969/j.issn.1671-637X.2021.07.017.
[17] Jiang M, Qi L L, Yao Y, et al. Radar and communication integration based on OFDM signal[C]//2020 IEEE International Conference on Signal Processing, Communi-cations and Computing (ICSPCC), Macau, China. IEEE, 2020. DOI:10.1109/ICSPCC50002.2020.9259515.
[18] Li W L, Xiang Z, Ren P. Waveform design for dual-function radar-communication system with golay block coding[J]. IEEE Access, 2019, 7: 184053-184062. DOI:10.1109/ACCESS.2019.2960658.
[19] 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.
[20] Franken G E A, Nikookar H, Genderen P V. Doppler tolerance of OFDM-coded radar signals[C]//2006 European Radar Conference. Manchester, UK. IEEE, 2006: 108-111. DOI:10.1109/EURAD.2006.280285.
[21] 周安敉. 基于OFDM的雷达通信一体化波形设计研究[D]. 石家庄：河北科技大学, 2020.
[22] Ma H, Sun X, Jin W X. Integrated waveform design based on spread spectrum OFDM radar communication[C]// 2019 IEEE 3rd Advanced Information Management, Communi-cates, Electronic and Automation Control Conference. Chong-qing, China. IEEE, 2020: 1258-1263. DOI:10.1109/IMCEC46724.2019.8984147.
[23] 侯艳丽, 周安敉, 郭鑫. 基于预编码的正交频分复用雷达通信一体化信号设计[J]. 科学技术与工程, 2021, 21(2): 611-615. DOI:10.3969/j.issn.1671-1815.2021. 02.028.
[24] 张霄霄, 梁兴东, 王杰, 等. 融合失配处理和LMS滤波的雷达通信一体化OFDM信号距离旁瓣抑制技术[J]. 信号处理, 2021, 37(9): 1727-1738. DOI:10.16798/j.issn.1003-0530.2021.09.017.
[25] 左家骏, 杨瑞娟, 程伟, 等. OFDM雷达通信共享信号距离旁瓣抑制研究[J]. 信号处理, 2020, 36(10): 1662-1667. DOI:10.16798/j.issn.1003-0530.2020.10.005.
[26] 林清源, 王彦平, 洪文. 一种基于CLEAN的SAR图像旁瓣抑制方法[J]. 中国科学院研究生院学报, 2011, 28(3): 355-359. DOI:10.7523/j.issn.2095-6134.2011. 3.012.
[27] 张天贤, 夏香根. OFDM SAR成像方法综述[J]. 雷达学报, 2020, 9(2): 243-258. DOI:10.12000/JR19116.
[28] Zhang T X, Xia X G. OFDM synthetic aperture radar imaging with sufficient cyclic prefix[J]. IEEE Transactions on Geoscience Remote Sensing, 2014, 53(1): 394-404. DOI:10.1109/TGRS.2014.2322813.
[29] 李占亚, 张光荣, 陈晓辉, 等. 同时含有限幅失真和量化失真的OFDM系统的联合优化[J]. 中国科学院大学学报, 2014, 31(2): 249-256. DOI:10.7523/jssn.2095-6134.2014.02.016.
[30] Armstrong J. Peak-to-average power reduction for OFDM by repeated clipping and frequency domain filtering[J]. Electronics Letters, 2002, 38(5): 246-247. DOI:10.1049/el:20020175.
[31] Wang Y, Ge J H, Wang L H, et al. Reduction of PAPR of OFDM signals using nonlinear companding transform[J]. Wireless Personal Communications, 2013, 71(1): 383-397. DOI:10.1007/s11277-012-0820-2.
[32] Bäuml R W, Fischer R F H, Huber J B. Reducing the peak-to-average power ratio of multicarrier modulation by selected mapping[J]. Electronics Letters, 1996, 32(22): 2056-2057. DOI:10.1049/el:19961384.
[33] Hasan M M. VLM precoded SLM technique for PAPR reduction in OFDM systems[J]. Wireless Personal Communi-cations, 2013, 73(3): 791-801. DOI:10.1007/s11277-013-1217-6.
[34] Hu S C, Wan S J, Yang M, et al. An improved SLM algorithm for OFDMA system with implicit side information[J]. Journal of Signal Processing Systems, 2022, 94(8): 837-846. DOI:10.1007/s11265-022-01750-x.
[35] Goel A, Gupta S. Side information embedding scheme for PTS based PAPR reduction in OFDM systems[J]. Alexandria Engineering Journal, 2022, 61(12): 11765-11777. DOI:10.1016/j.aej.2022.05.021.
[36] Chen C Y, Wang C H, Chao C C. Complementary sets and reed-muller codes for peak-to-average power ratio reduction in OFDM[M]//Applied Algebra, Algebraic Algorithms and Error-Correcting Codes. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006: 317-327. DOI:10.1007/11617983_31.
[37] Sengupta S, Lande B K. An approach to PAPR reduction in OFDM using Goppa codes[J]. Procedia Computer Science, 2020, 167: 1268-1280. DOI:10.1016/j.procs.2020. 03.443.
[38] Garmatyuk D. Cross-range SAR reconstruction with multicarrier OFDM signals[J]. IEEE Geoscience and Remote Sensing Letters, 2012, 9(5): 808-812. DOI:10.1109/LGRS.2011.2182176.
[39] Garmatyuk D, Brenneman M. Adaptive multicarrier OFDM SAR signal processing[J]. IEEE Transactions on Geoscience and Remote Sensing, 2011, 49(10): 3780-3790. DOI:10.1109/TGRS.2011.2165546.