ADAPTIVE BEAMFORMER FOR SONAR IMAGING

摘要

Provided are method, system, and computer program product for imaging an underwater environment. The method may include receiving sonar returns and converting the sound energy of the sonar returns into sonar return data, and generating first beam data associated with a first beam having at least one first main lobe oriented in a first direction. Generating the first beam data may include: forming the sonar return data in the first direction; applying a first predetermined window to the sonar return data to define a first weighted return data; applying a second predetermined window to the sonar return data to define a second weighted return data; comparing a first power of the first weighted return data to a second power of the second weighted return data; and defining, when the first power is less than the second power, the first beam data based upon the first weighted return data.

主权项

1. A method for adaptive beamforming, the method comprising:
receiving, via a transducer array, sonar returns from a sonar pulse transmitted into an underwater environment and converting the sound energy of the sonar returns into sonar return data, wherein the transducer array includes at least two transducer elements; generating, via a sonar signal processor, a first beam data associated with a first beam based on the sonar return data, wherein the first beam defines at least one first main lobe oriented in a first direction, the generating comprising:
forming the sonar return data in the first direction;applying a first predetermined window to the sonar return data to define first weighted return data, wherein the first predetermined window is configured to at least partially reduce the sonar return data outside the first direction in the first weighted return data;applying a second predetermined window to the sonar return data to define second weighted return data, wherein the second predetermined window is configured to at least partially reduce the sonar return data outside the first direction in the second weighted return data;comparing a first power of the first weighted return data to a second power of the second weighted return data; anddefining, in an instance in which the first power is less than the second power, the first beam data based upon the first weighted return data.