Dept. of Electr. and Comput. Eng., State Univ. of New York, Buffalo, NY.
IEEE Trans Image Process. 1997;6(5):736-49. doi: 10.1109/83.568930.
This paper presents a system model and inversion for imaging moving targets using phased arrays. The system model provides a mathematical framework to represent the motion of a moving target in the beam-steering domain which is identified as the slow-time domain. The inversion provides a reconstruction of the moving targets in the spatial and velocity domains. It is shown that a randomized beam steering strategy in the slow-time domain can improve the resolution in the velocity domain. The imaging problem is also formulated for a phased array system that spotlights a target area with its transmitted beam to improve the target to clutter power ratio, and obtains beam-steered data in the receive mode for high-resolution imaging. We cite a diagnostic medical ultrasound problem due to the practical difficulties and challenges that are associated with it.
本文提出了一种利用相控阵进行运动目标成像的系统模型和反演方法。该系统模型提供了一个数学框架，用于表示运动目标在波束指向域中的运动，该域被标识为慢时域。反演提供了对运动目标在空间和速度域中的重建。结果表明，在慢时域中采用随机化的波束指向策略可以提高速度域中的分辨率。还针对相控阵系统的成像问题进行了研究，该系统通过发射波束对目标区域进行聚焦，以提高目标与杂波的功率比，并在接收模式下获取波束指向数据，以实现高分辨率成像。由于与其实践困难和挑战相关，我们引用了一个诊断医学超声问题。
