一种交替双基地模式下回波域的相位同步方法及系统
By performing sub-aperture division and phase information processing on the echoes of satellite A and satellite B of the spaceborne bistatic SAR system, the phase error problem introduced by terrain undulation was solved, and high-precision phase synchronization of the bistatic SAR system was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAN INSTITUE OF SPACE RADIO TECH
- Filing Date
- 2023-12-19
- Publication Date
- 2026-07-17
AI Technical Summary
In alternating bistatic mode, uncompensated phase errors in spaceborne bistatic SAR systems lead to bistatic SAR focusing distortion and interferometric phase errors, affecting the height measurement performance of DEM along the azimuth direction. Existing methods have failed to effectively solve the phase error problem introduced by terrain undulations.
By dividing the echoes from satellites A and B into sub-apertures, performing range pulse compression processing, extracting the phase information of the peak position and performing interpolation processing, the phase result of the continuous pulse repetition period is obtained, and azimuth spatial variation pre-compensation is performed to achieve bistatic phase synchronization.
The method effectively compensates for phase errors caused by terrain undulations, improves the phase synchronization accuracy of the bistatic SAR system, and simulation experiments verify the effectiveness of the method.
Smart Images
Figure CN117849747B_ABST