圆台阵列杂波模型及空时二维自适应处理  

Clutter Model and Space Time Adaptive Processing for Truncated Cone Array

作　　者：唐波[1] 汤俊[1] 彭应宁[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《航空学报》2010年第3期587-592,共6页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(60602048);航空科学基金(20060112118);通信系统信息控制技术国家级重点实验室基金

摘　　要：针对圆台共形阵列,建立了空时二维自适应处理(STAP)的杂波模型,给出了圆台阵列杂波抑制最优权值的计算方法。在此基础之上,为了实现可应用到实际环境中的自适应处理方法,进一步讨论了将局部联合域(JDL)降维算法推广至圆台阵列中的问题。得出了圆台阵列JDL算法降维变换矩阵的表达形式,研究了参考波束的数目选取、波束指向等因素对降维损失的影响。理论分析以及仿真结果表明,通过合理选择通道数、波束方位向指向间隔等参数,该算法能够减少自适应波束形成的计算量,而且可以用较少的训练样本获得较好的处理性能。A clutter model for truncated cone array space time adaptive processing（STAP）is presented in this article.Based on this model,an optimal space time filter for the clutter suppression of a truncated cone array is derived.To enable the adaptive processing method to be applied to real environment,the generalization of the joint domain localized（JDL）algorithm to a truncated cone array is discussed and the transformed matrix of the JDL algorithm for a truncated cone array is obtained.The number of channels as well as the azimuth angle interval are analyzed,which should be selected for minimum signal to interference and noise ratio（SINR）loss of reduced dimension.Theoretical analysis and simulation results show that through proper selection of parameters,such as number of channels and azimuth angle intervals,the generalized JDL algorithm is able to obtain suboptimum performance with less training samples and much less computation load.

关 键 词：空时二维自适应处理 圆台阵列 杂波模型 最优处理 局部联合域算法 

分 类 号：V243.2[航空宇航科学与技术—飞行器设计] TN959.1[电子电信—信号与信息处理]