有效的寬帶寬角發(fā)射干擾置零新方法
Efficient Wideband Jammer Nulling in Large Scanning Angle
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摘要: 相控陣?yán)走_采用寬帶技術(shù)是雷達發(fā)展的必然趨勢。而抗寬帶干擾技術(shù)是寬帶相控陣?yán)走_必須解決的問題，該文針對發(fā)射信號為線性調(diào)頻信號，提出了一種寬帶寬角發(fā)射波束形成新方法。該算法在已精確估計出信號和干擾方向的前提下，把窄帶權(quán)和寬帶權(quán)相結(jié)合形成最優(yōu)權(quán)。該方法能在保證距離高分辨特性的前提下，在干擾方向形成較寬凹口，文中給出了實現(xiàn)框圖并仿真證實了該方法的有效性。
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關(guān)鍵詞:
- 線性調(diào)頻;寬帶雷達;波束形成;置零
Abstract: Phased array radar combined with wideband technique is the development trend in radar, while technology of restraining wideband interference must be resolved in wideband phased array radar. A new wideband transmitting beamforming method is presented in this paper which uses LFM signal. The algorithm produces optimal weight by combining wideband with narrowband weight on the premise of accurate DOA estimation. The method can ensure high distance resolution of the signal and form pattern null in the direction of the interference. Simulation results demonstrate the effectiveness of the method. -
張光義.相控雷達系統(tǒng)[M].北京:國防工業(yè)出版社,1997.[2]羅永健,俞根苗,張守宏,等.基于確知波形的寬帶寬角相控陣發(fā)射波束形成方法.電子學(xué)報,2003,31(3):358-360.[3]Frost O L. An algorithm for linearly constrained adaptive array processing[J].Proc. IEEE.1972, 60(8):926-[4]Zhang M, Er M H. Robust adaptive beamforming for broadband arrays[J].Circuits systems and signal processing.1997, 16(2):207-[5]Affes S. Wideband robust adaptive beamforming via target tracking. Proc. of the 7th IEEE SP Workshop on SSAP, Quebec City, Canada, 1994:141 - 145.[6]Torres J A, David R M, Davis J, et al.. Efficient wideband jammernulling when using stretch processing. IEEE Trans. on AES, 2000,36(4): 1167- 1178.[7]李榮鋒,王永良,萬山虎.自適應(yīng)天線方向圖干擾零陷加寬方法研究.現(xiàn)代雷達,2003,25(2):42-45.[8]Guerci J R. Theory and application of covariance matrix tapers for robust adaptive beamforming[J].IEEE Trans. on SP.1999, 47(4):977- -
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