宽带相控阵雷达数字波束形成及干扰置零方法

曹运合; 张焕颖; 张守宏; 刘峥

doi:10.3724/SP.J.1146.2005.00540

宽带相控阵雷达数字波束形成及干扰置零方法

doi: 10.3724/SP.J.1146.2005.00540

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出版历程
- 收稿日期: 2005-05-16
- 修回日期: 2006-07-10
- 刊出日期: 2007-02-19

Digital Beamforming and Jammer Nulling Method for Wideband Phased Array Radar

摘要

摘要: 宽带相控阵波束形成通常使用模拟延时线，但量化误差及硬件的高代价阻碍了它的应用。该文在基于子阵和发射为线性调频信号的前提下，提出一种宽带子阵数字波束形成方法。该方法首先对接收信号拉伸处理和低通滤波，然后在子阵间加权实现宽带子阵数字波束形成。低通滤波后的数字采样和信号处理均可在低的速率下进行，大大降低了运算量且容易实现。此外，宽带干扰的存在会严重影响一维距离像的性能，为了抑制宽带强干扰信号，在上述数字波束形成的基础上，提出了一种宽带干扰置零方法。该方法在强宽带干扰功率的情况下仍可很好地工作。最后，对测距误差和子阵栅瓣的影响进行分析并仿真证实了该方法的有效性。
- 相控阵雷达;宽带;数字波束形成;拉伸处理;宽带干扰
Abstract: Analog Time Delay Units (TDUs) are usually used for wideband phased array beamforming, but quatilization error and high cost restrict its applications. This paper presents a new wideband digital beamforming method using subarrays and Linear Frequency Modulation (LFM) signal. The algorithm implements stretch processing and narrowband filtering, and achieves digital beamforming by weighting inter-subarrays. Lowpass filtering limits the bandwidth of signal prior to digitization and signal processing, reducing the required speed of subsequent digitization and the computing burden. Furthermore, the presence of wideband interference will degrade performance of one dimension profile. In order to suppress the wideband interference, a new wideband jammer nulling algorithm is proposed based on digital beamforming above. The methods can work well in the case of strong interferences. Finally, influences of distance error and grating-lobe are analyzed and computer simulations demonstrate the effectiveness of the proposed method.

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[1] Frost O L. An algorithm for linearly constrained adaptive array processing [J].Proc. IEEE.1972, 60(8):926-935 [2] Vook F W and Compton R T. Bandwidth performance of linear adaptive arrays with tapped delay-line processing [J]. IEEE Trans. on AES, 1992, 28(3): 901-908. [3] Mayhan J T and Simmons A J, et al.. Wideband adaptive antenna nulling using tapped delay lines [J]. IEEE Trans. AP, 1981, 29(6): 923-936. [4] Affes S. Wideband robust adaptive beamforming via target tracking[A]. Proc of the 7th IEEE SP workshop on SSAP [C], Quebec City, Canada, 1994: 141-145. [5] Zhang Y, Weiss S, and L Hanzo. Subband adaptive antenna array for wideband wireless communications [J]. ICMMT, Beijing, China, 2002: 693-696. [6] Lin Feng-ling C, Gerlach K, and Picciolo M L. Band- partitioned sidelobe canceller for a wideband radar[C]. 2003 IEEE Radar Conference, Huntsville, AL, United States, 2003: 310-314. [7] Ward D B and Ding Z, et al.. Broadband DOA estimation using frequency invariant beamforming [J].IEEE Trans. Signal Processing.1998, 46(5):1463-1469 [8] Ward D B and Kennedy R A, et al.. FIR filter design for frequency invariant beamformers [J].IEEE Signal Processing Letters.1996, 3(3):69-71 [9] Torres J A, Davis R M, and Kramer J D R, et al.. Efficient wideband jammer nulling when using stretch processing [J]. IEEE Trans. on AES. 2000, 36(4): 1167-1178. [10] Lin W T and Yu K B. Adaptive beamforming for wideband jamming cancellation [A]. In Proc of the IEEE Nat. Radar Conf. Syracuse, New York, 1997: 82-87. [11] Lin C T and Ly H. Sidelobe reduction through subarray overlapping for wideband arrays [J]. Radar Conference, Proceedings of the 2001 IEEE, Atlanta, GA, 1-3 May, 2001: 228-233. [12] 张光义. 相控雷达系统[M]. 北京: 国防工业出版社, 1994: 323-333. [13] 罗永健，俞根苗，张守宏等. 基于确知波形的宽带宽角相控阵发射波束形成方法[J]. 电子学报，2003, 31(3): 358-360. Luo Yong-jian, Yu Gen-miao, and Zhang Shou-hong, et al.. Wideband transmitting beamforming for phased array based on known waveform in the presence of large scan angle. Acta Electronica Sinica, 2003, 31(3): 358-360. [14] 曹运合，张守宏，王胜华等. 有效的宽带宽角发射干扰置零新方法[J]. 电子与信息学报, 2005, 27(2): 577-579. Cao Yun-he, Zhang Shou-hong, and Wang Sheng-hua, et al.. Efficient wideband jammer nulling in large scanning angle. Journal of electronics Information Technology, 2005, 27(2): 577-579. [15] 曹运合，张守宏，罗永健等. 基于拉伸处理的宽带宽角波束形成技术[J]. 西安交通大学学报, 2004, 38(8): 847-850. Cao Yun-he, Zhang Shou-hong, and Luo Yong-jian, et al.. Beamforming techniques of wideband and large scan angle based on stretch processing. Journal of Xi'an Jiaotong University, 2004, 38(8): 847-850. [16] Corbin J and Howard R. TDU quantization error impact on wideband phased-array performance [A].[J].Proc IEEE Int. Conf. Phased Array Syst. Technology, Dana Point, CA.2000,:- [17] Guerci J R. Theory and application of covariance matrix tapers for robust adaptive beamforming [J].IEEE Trans. on SP.1999, 47(4):977-985 [18] Mailloux R J. Constrained feed technique for subarrays of large phased arrays [J]. Electronics Letters, 34(23): 2191- 2193.

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