机载多载频频控阵非均匀距离模糊杂波抑制方法

doi:10.12305/j.issn.1001-506X.2024.02.10

摘要/Abstract

摘要：

机载雷达下视工作面临严重的地海杂波, 雷达平台运动造成杂波多普勒频率严重扩散, 将微弱目标完全淹没。空时自适应处理(space time adaptive processing, STAP)技术通过联合多天线脉冲的接收信号, 能够有效地抑制杂波, 实现运动目标检测。对于非正侧视阵列高速平台雷达, 杂波距离依赖和距离模糊严重制约着目标检测性能。基于多载频频控阵, 通过发射一组载频不同的正交信号, 在杂波回波中, 获得新的发射维自由度, 并根据不同模糊在发射维的差异分离各模糊区域。此外, 通过进一步对分离后的近程进行杂波补偿, 利用降维STAP实现杂波抑制。仿真结果验证了所提方法的有效性。

关键词: 空时自适应处理, 距离模糊, 多载频频控阵, 非均匀杂波

Abstract:

The looking-down mode of the airborne radar faces serious low-sea clutter, and the Doppler frequency of clutter spreads seriously due to the movement of radar platform, which will completely submerge the weak target. Space-time adaptive processing (STAP) technology can effectively suppress clutter and realize moving target detection by combining the received signals of multi-antenna pulses. For non-side-looking array high-speed platform radar, clutter range dependence and range ambiguity seriously restrict the performance of target detection. In this paper, based on the multi-carrier frequency control array, by transmitting a group of orthogonal signals with different carrier frequencies, a new degree of freedom of the transmit dimension is obtained in the clutter echo, and the range-ambiguous regions are separated according to the difference of distinct ambiguities in the transmit dimension. In addition, by further compensating the short-range clutter after separation, a reduced-dimensional STAP is used to mitigate the clutter. Simulation results verify the effectiveness of the proposed method.

Key words: space-time adaptive processing (STAP), range ambiguity, multi-carrier frequency control array, inhomogeneous clutter

中图分类号:

TN958.5

刘成, 王华柯, 全英汇, 廖桂生. 机载多载频频控阵非均匀距离模糊杂波抑制方法[J]. 系统工程与电子技术, 2024, 46(2): 459-469.

Cheng LIU, Huake WANG, Yinghui QUAN, Guisheng LIAO. Non-uniform distance ambiguity clutter suppression method for airborne multi-carrier frequency control array[J]. Systems Engineering and Electronics, 2024, 46(2): 459-469.

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参考文献 34

1	VOLESR.New approach to m. t. i. clutter locking[J].Proc. of the Institution of Electrical Engineers,1973,120(11):1383-1390. doi: 10.1049/piee.1973.0277
2	廖桂生. 相控阵天线AEW雷达时-空二维自适应处理[D]. 西安: 西安电子科技大学, 1992.
	LIAO G S. Time-space two-dimensional adaptive processing of phased array antenna AEW radar[D]. Xi'an: Xidian University, 1992.
3	王永良,彭应宁.空时自适应信号处理[M].北京:清华大学出版社,2000.
	WANGY L,PENGY N.Space-time adaptive signal processing[M].Beijing:Tsinghua University Press,2000.
4	王彤,保铮,廖桂生.地面慢速目标检测的STAP方法[J].电子学报,2000,28(9):123-125, 30.
	WANGT,BAOZ,LIAOG S.STAP method for ground slow target detection[J].Electronic Journal,2000,28(9):123-125, 30.
5	刘聪锋,廖桂生.基于对角加载的STAP性能改善[J].电子与信息学报,2008,30(4):906-910.
	LIUC F,LIAOG S.Performance improvement of STAP based on diagonal loading[J].Journal of Electronics & Information Technology,2008,30(4):906-910.
6	KREYENKAMPO,KLEMMR.Doppler compensation in forward-looking STAP radar[J].IEE Proceedings of Radar, Sonar and Navigation,2001,148(5):253-258. doi: 10.1049/ip-rsn:20010557
7	李明,廖桂生,曲毅,等.一种稳健的机载前视阵雷达杂波谱补偿方法[J].西安电子科技大学学报(自然科学版),2009,36(4):633-638. doi: 10.3969/j.issn.1001-2400.2009.04.011
	LIM,LIAOG S,QUY,et al.A robust clutter spectrum compensation method for airborne forward-looking array radar[J].Journal of Xi'an University of Electronic Science and Technology (Natural Science Edition),2009,36(4):633-638. doi: 10.3969/j.issn.1001-2400.2009.04.011
8	郭艺夺,宫健.基于稀疏恢复的自适应角度多普勒补偿方法[J].雷达科学与技术,2020,18(5):517-523. doi: 10.3969/j.issn.1672-2337.2020.05.009
	GUOY D,GONGJ.Adaptive angle Doppler compensation method based on sparse recovery[J].Radar Science and Technology,2020,18(5):517-523. doi: 10.3969/j.issn.1672-2337.2020.05.009
9	JIA F D, HE Z S, QIAN J H, et al. Adaptive angle-Doppler compensation in airborne phased radar for planar array[C]//Proc. of the IEEE 13th International Conference on Signal Processing, 2016: 1585-1588.
10	FALLAH A, BAKHSHI H. Extension of adaptive angle-Doppler compensation (AADC) in STAP to increase homogeneity of data in airborne bistatic radar[C]// Proc. of the 6th International Symposium on Telecommunications, 2012: 367-372.
11	刘锦辉,廖桂生,李明.机载前视阵雷达杂波谱空时分离插值方法[J].电子与信息学报,2011,33(9):2120-2124.
	LIUJ H,LIAOG S,LIM.Space-time separation interpolation method for clutter spectrum of airborne forward-looking array radar[J].Journal of Electronics and Information,2011,33(9):2120-2124.
12	VARADARAJAN V, KROLIK J L. Space-time interpolation for adaptive arrays with limited training data[C]//Proc. of the International Conference on Acoustics, Speech and Signal Processing, 2003: 1-6.
13	董烁烁. 机载阵列雷达杂波抑制方法研究[D]. 西安: 西安电子科技大学, 2014.
	DONG S S. Research on clutter suppression of airborne array radar[D]. Xi'an: Xidian University, 2014.
14	XUJ W,LIAOG S,ZHANGY H,et al.An adaptive range-angle-Doppler processing approach for FDA-MIMO radar using three-dimensional localization[J].IEEE Journal of Selected Topics in Signal Processing,2017,2,309-320.
15	XUJ W,ZHUS Q,LIAOG S.Range ambiguous clutter suppression for airborne FDA-STAP radar[J].IEEE Journal of Selected Topics in Signal Processing,2015,9(8):1620-1631. doi: 10.1109/JSTSP.2015.2465353
16	WANGY Z,ZHUS Q.Range ambiguous clutter suppression for FDA-MIMO forward looking airborne radar based on main lobe correction[J].IEEE Trans.on Vehicular Technology,2021,70,2032-2046. doi: 10.1109/TVT.2021.3057436
17	WENC,TAOM L,PENGJ Y,et al.Clutter suppression for airborne FDA-MIMO radar using multi-waveform adaptive processing and auxiliary channel STAP[J].Signal Processing,2019,154,280-293. doi: 10.1016/j.sigpro.2018.09.016
18	WENC,PENGJ Y,ZHOUY,et al.Enhanced three-dimensional joint domain localized STAP for airborne FDA-MIMO radar under dense false-target jamming scenario[J].IEEE Sensors Journal,2018,18(10):4154-4166. doi: 10.1109/JSEN.2018.2820905
19	XUJ W,LIAOG S.Space-time adaptive processing with vertical frequency diverse array for range-ambiguous clutter suppression[J].IEEE Trans.on Geoscience and Remote Sensing,2016,54(9):5532-5564.
20	HEX P,LIAOG S,ZHUS Q,et al.Near-range clutter suppression with elevation element multifrequency subpulse coding array radar[J].IEEE Trans.on Geoscience and Remote Sensing,2022,60,1-15.
21	HEX P,LIAOG S,ZHUS Q,et al.Range ambiguous clutter suppression approach with elevation time diverse array[J].IEEE Trans.on Aerospace and Electronic Systems,2021,59(1):359-373.
22	FORSYTHE K W, BLISS D W. Waveform correlation and optimization issues for MIMO radar[C]//Proc. of the 39th Asilomar Conference on Signals, Systems and Computers, 2005: 1306-1310.
23	WANGH K,LIAOG S,XUJ W,et al.Transmit beampa-ttern design for coherent FDA by piecewise LFM waveform[J].Signal Processing,2019,161,14-24. doi: 10.1016/j.sigpro.2019.03.010
24	WANGH K,LIAOG S,ZHANGY H,et al.Transmit beam- pattern synthesis for chirp space-time coding array by time delay design[J].Digital Signal Processing,2020,110(18):1051-2004.
25	WANGH K,QUANY H,LIAOG S,et al.Space-time coding technique for coherent frequency diverse array[J].IEEE Trans. on Signal Processing,2021,69,5994-6008.
26	GAOK D,WANGW Q,CHENH,et al.Transmit beamspace design for multi-carrier frequency diverse array sensor[J].IEEE Sensors Journal,2016,16(14):5709-5714.
27	CHENW,CHONGX W,WANGY.Range-dependent ambi-guous clutter suppression for airborne SSF-STAP radar[J].IEEE Trans.on Aerospace and Electronic Systems,2021,58(1):359-373.
28	ZHANGW,ANR X,HEN Y,et al.Reduced dimension STAP based on sparse recovery in heterogeneous clutter environments[J].IEEE Trans.on Aerospace and Electronic Systems,2020,56(1):785-795.
29	ZHANGW,HANM H,HEZ S,et al.Data dependent reduced dimension STAP[J].Radar Sonar & Navigation Iet,2018,13(8):1287-1294.
30	BATTISTI N. Reduced dimension principal components for STAP[C]//Proc. of the IEEE National Radar Conference, 2013.
31	张良,保铮,廖桂生.降维空时自适应处理研究[J].电子与信息学报,2001,23(3):261-267.
	ZHANGL,BAOZ,LIAOG S.Research on dimensionality reduction space-time adaptive processing[J].Journal of Electronics and Information,2001,23(3):261-267.
32	CAOC H,ZHANGJ,MENGJ M,et al.Clutter suppression and target tracking by the low-rank representation for airborne maritime surveillance radar[J].IEEE Access,2020,8,160774-160789.
33	FENGW K,ZHANGY S,HEX Y.Clutter rank estimation for reduce-dimension space time adaptive processing mimo radar[J].IEEE Sensors Journal,2016,17(2):238-239.
34	YANG X P, LIU Y X, TENG L. Reduced-rank sub-CPI STAP with fast convergence measure of effectiveness in nonhomogeneous clutter[C]//Proc. of the Institution of Engineering and Technology Radar Conference, 2013: 1-5.

参数名	数值	参数名	数值
载频f₀/GHz	5	相干脉冲数K	20
训练样本数L	300	脉冲持续时间T_p/μs	10
接收阵元间d_R/m	0.03	距离模糊数P	4
平台运动速度v_p/(m/s)	150	距离分辨率ΔR/m	20
平台高度H/km	6	频率增量Δf/kHz	2.5
脉冲重复频率f_r/kHz	10	目标距离R₀/km	12
发射波形数M	8	目标水平角θ₀/(°)	90
接收阵元数N	16	目标俯仰角φ₀/(°)	30.06

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