时频栅格误差条件下的双基地MIMO雷达角度估计  

Angle estimation of bistatic MIMO radar under the time frequency grid error

作　　者：黄中瑞[1] 周青松[1] 张剑云[1] 

机构地区：[1]电子工程学院,安徽合肥230037

出　　处：《系统工程与电子技术》2016年第10期2267-2274,共8页Systems Engineering and Electronics

基　　金：国家自然科学基金(61201279);安徽省自然科学基金(1408085MF128)资助课题

摘　　要：研究了时频栅格误差引起的匹配滤波器失配下双基地多输入多输出(multiple-input multiple-output,MIMO)雷达的角度估计问题。首先,建立了存在时延和多普勒频率栅格误差条件下的双基地MIMO雷达信号模型;其次,推导了正交频分复用线性调频信号和相位编码信号的栅格误差失配矩阵,并分析了其对目标收发角度估计的影响;再次,针对正交频分复用线性调频信号,提出了平行因子和最小二乘相结合的发射角度估计算法,该方法能够有效减小栅格误差失配矩阵对发射角度估计的影响;最后,仿真实验表明,栅格误差失配矩阵对相位编码信号的角度估计影响较小,但对正交频分复用线性调频信号的发射角度估计则会产生较大的影响,从而进一步验证了理论分析的正确性。The angle estimation for bistatic multiple-input multiple-output （MIMO） radar under the mismatch filter in the presence of time frequency grid error is studied. Firstly, the signal model for bistatic MIMO radar under delay and Doppler frequency grid error is built. Secondly, the grid error mismatch matrix of orthogonal frequency division multiplexing linear frequency modulation signal and phase coded signal are constructed and the effect it pay on the angle estimation are analyzed. Further more, the parallel factor analysis and the least squares method are combined to estimate the transmit angle for the orthogonal frequency division multiplexing linear frequency modulation signal. The effect on the transmit angle estimation caused by the grid error mismatch matrix can be reduced by using the propose method. Finally, simulation results demonstrate that, the impact of the grid error mis- match matrix on the angle estimation in phase coded signal is little, but for the orthogonal frequency division multiplexing linear frequency modulation signal is in reverse, which illustrates the validity of the theory analysis.

关 键 词：双基地多输入多输出雷达 栅格误差失配矩阵 角度估计 平行因子算法 最小二乘算法 

分 类 号：TN958[电子电信—信号与信息处理]