一种基于非线性调频波形的双通道参数估计器

A Novel Bi-Channel Parameter Estimator Based on Nonlinear Frequency Modulated Waveforms

传统的跟踪雷达中使用多普勒滤波器组结构的距离、速度联合估计器是理论上的最大似然估计器，这种估计器结构复杂开销大，在多目标环境下对小目标检测有损失．在对具有比较宽的多普勒响应范围的非线性调频（NonLinear Frequency Modulation,NLFM）波形优化设计的基础上，文章提出了一种双通道非线性调频脉压结构的参数估计器，并分析了其理论性能，给出了相应的仿真结果．

In traditional tracking radars, the joint parameter estimator that is constructed as the Doppler filter bank is optimum in the sense of maximum likelihood, whereas such estimator bears the shortcomings of the considerable complexity in implementation and the loss of detectability in dense target environment. Based on the designing of sub-optimum nonlinear frequency modulated signal, a novel structure that has only two NLFM channels is described, with the performance analysis and the simulation results also presented.