Method for measuring synthetic aperture sonar motion error and underwater acoustic channel phase error
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NAVAL UNIV OF ENG PLA
- Publication Date
- 2008-09-17
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
Technical field
[0001] The invention belongs to the field of synthetic aperture sonar signal processing, and mainly relates to a method for measuring synthetic aperture sonar motion error and underwater acoustic channel phase error. Background technique
[0002] Synthetic aperture sonar requires the platform to move in a uniform straight line and the underwater acoustic channel has no phase error, but in fact there will always be motion errors in the platform and phase errors in the underwater acoustic channel, both of which seriously affect the clarity of imaging. Therefore, the synthetic aperture sonar system must be used for motion compensation and channel compensation. The first method of motion compensation is to use a motion sensor to measure the motion error, and perform motion compensation for the motion error in signal processing. This method requires a high-precision motion sensor, which is expensive and cannot compensate for the phase error caused by the underwater aco...