摘要
针对空间色噪声环境提出一种同时利用空域和时域信息的双基地MIMO雷达DOD(Direction of Departure)和DOA(Direction of Arrival)联合估计方法。该方法在时域高斯白噪声的假设下,将不同时刻的匹配滤波器输出进行互相关以消除空间色噪声的影响并获得空时互相关矩阵,然后基于传播算子方法构造一低维矩阵,利用其特征参数与待估参数的特定关系获得目标DOD(Direction of Departure)和DOA(Direction of Arrival)的联合估计。该方法能够有效克服空间色噪声的影响,所估计参数自动配对。与现有方法相比,其孔径损失小,具有更优的参数估计性能和最大可检测目标数,且对发射阵元个数没有特殊要求,具有更广泛的适用性。计算机仿真验证了本文方法的有效性。
In view of special colored noise environment, a method of joint estimation of Direction of Departure （DOD） and Direction of Arrival （DOA） for bistatic MIMO radar is presented. On basis of assumption of temporally Gaussian white noise, this method is used to perform cross - correlation of the match filter outputs in different time delay to eliminate effect of the spatial colored noise and obtain the spatio-temporally cross-correlation matrix. Then, a low-dimensional matrix is constructed on basis of the propagator method to obtain joint estimation of DODs and DOAs of the targets by using the specified relationship between the characteristic parameters and the parameters to be estimated. This method can eliminate effect of spatial colored noise effectively, and the obtained parameters are automatically paired. Comparing with the existing methods, the proposed method has more widely applicability ow- ing to its less array aperture loss, excellent parameters estimating capability, maximal quantity of detecting target as well as no special requirement for the number of transmitting array. The results simulated with computers verify ef- fectiveness of the proposed method.
出处
《火控雷达技术》
2013年第4期47-52,共6页
Fire Control Radar Technology
基金
国家自然科学基金(60902079)
国防科技重点实验室基金资助课题(9140C0104081005)
关键词
双基地MIMO雷达
空间色噪声
空时互相关矩阵
传播算子
bistatic MIMO radar
spatial colored noise
spatio-temporal cross-correlation matrix
propagator meth-od （PM）
