波形正交性退化下机载MIMO雷达杂波模型与自由度分析  

Analysis of clutter model and DOFs for airborne MIMO radar under orthogonal degradation of waveform

作　　者：张西川[1] 张永顺[1] 谢文冲[2] 王永良[2] 张增辉[3] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800 [2]空军雷达学院,湖北武汉430019 [3]国防科学技术大学理学院,湖南长沙410073

出　　处：《系统工程与电子技术》2012年第1期80-84,共5页Systems Engineering and Electronics

基　　金：国家杰出青年科学基金(60925005)资助课题

摘　　要：针对发射波形正交性退化影响机载多输入多输出(multiple-input multiple-output,MIMO)雷达的杂波特性,基于信号空间和子阵空间的变换原理,建立了波形正交性退化下的机载MIMO雷达杂波通用模型和标准模型。基于带限信号的最优逼近特性,分析了波形正交性退化下的空时等效阵列孔径变化规律,提出了杂波自由度(degree of freedom,DOF)的估计准则。最后,仿真验证了杂波模型及杂波自由度估计准则的有效性。Aiming at the clutter characteristics of airborne multiple-input multiple-output（MIMO） radar under the orthogonal degradation of waveform,the general and standard clutter models of airborne MIMO radar are presented under the orthogonal degradation of waveform based on the transformed principle of subarray space and transmit signal space.Then the regularity of change for space-time equivalence aperture is analyzed under the orthogonal degradation of waveform based on the optimum approached property of the band-limit signal,and an estimation rule for the degree of freedom（DOF） of clutter is presented.Finally,simulation results show the effectivity of the proposed models and rules.

关 键 词：机载多输入多输出雷达 波形正交性退化 杂波模型 杂波自由度 

分 类 号：TN957.51[电子电信—信号与信息处理]