Systems and methods for low grating sidelobe synthetic aperture sonar

摘要

The systems and methods described herein relate to systems and methods for synthetic aperture sonar (SAS) having multiple transmitters and generating orthogonal pinging sequences configured to enhance performance.

主权项

1. A method of generating a synthetic aperture sonar image, comprising:
providing a synthetic aperture sonar (SAS) array having at least one transmitter element and a plurality of receiver elements arranged along a first axis, wherein each of the transmitter element and the receiver elements have a first width, wherein the transmitter element is configured to generate a first set of signals having a plurality of orthogonal acoustic signals, and calculating the effective spacing of the SAS array, representing an effective distance between the transmitter element and the receiver elements during motion; simultaneously moving the SAS array along the first axis and generating, using the transmitter element, a first acoustic signal from the first set of signals; calculating a threshold distance as the effective spacing divided by the number of acoustic signals in the first set of signals; in response to determining that the SAS array has moved the threshold distance, generating, using the transmitter element, a second acoustic signal from the first set of signals, wherein the second acoustic signal is orthogonal to the first acoustic signal.