时延、到达角及多普勒频率联合估计新方法

A New Joint Estimation Approach for Time Delays,DOAs and Doppler Shifts

针对多目标回波时延、到达角和多普勒频率估计在一维和二维算法的局限性,利用照射信号的周期重复性建立了具有旋转不变结构的阵列接收信号模型,并将PRO-ESPRIT算法应用于该信号模型,通过新模型中的旋不变因子及其对应的特征向量估计得到了各多普勒频率、时延和到达角参数,从而验证了该方法的有效性。

For estimation of the time delays, DOAs and Doppler shifts of multipath reflections in the limitations of one-dimensional and two-dimensional algorithm,an array signal model is developed based on the repetitive characteristic of the transmitted signal,which has the rotational invariance property. The PRO-ESPRIT algorithm is applied to this signal model, and the respective Doppler shifts,time delays and DOAs are estimated from the rotational invariance factors and corresponding eigenvectors.The computer simulations validate the availability of this approach.