| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to precisely compensate blurring of a reproduced image caused by a change in the propagation delay time of radio wave even when a secondary change or more cannot be neglected.SOLUTION: An autofocus circuit 4 estimates a secondary delay change or more generated by the influence of a translational motion to compensate a change in transit and phase in a target delay axial direction generated by a secondary delay change or more. Thus, it becomes possible to precisely compensate blurring of a reproduced image caused by a change in the propagation delay time of radio wave even when a secondary change or more cannot be neglected. |
