单通道SAR无模糊估计快速运动目标速度

该文提出一种利用单通道相位信息无模糊估计地面运动目标径向速度方法。在距离频域做两视处理，并在多普勒域经过两视干涉处理，使得运动目标的干涉相位满足相位连续性假设。利用最小二乘线性拟合估计干涉相位关于多普勒频率的斜率，径向速度可由该斜率计算得到。该文方法具有不受相位缠绕影响的优点。相比于单通道幅度方法，该方法具有更高的估计精度和实时性。该方法在多普勒域能够同时估计多个目标径向速度。通过实测数据处理验证了该文方法的有效性。

Unambiguous Velocity Estimation for Fast Moving Targets Using Single Channel SAR

A phase-based method using a single channel SAR is proposed to estimate the radial velocity of ground moving targets unambiguously. Two-look operation in the range frequency domain and interferometry in the Doppler domain are done made to keep the phase meet the assumption of phase continuity. The lease squares linear fitting is used to estimate the slope between interferometric phase and Doppler frequency, and the radial velocity can be calculated by the slope. The proposed method possesses the advantage of being independent on phase wrapping. Compared with the single channel amplitude-based method, the method is able to provide greater precision and usefulness. The radial velocities of multi-targets can be estimated simultaneously in the Doppler domain. Experimental results validate the effectiveness of the proposed method.