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An adaptive beamforming algorithm for broadband active sonar
Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181), 2002An adaptive beamforming algorithm was developed for broadband active sonar with a convergence time on the order of the pulse duration and effective interference nulling capabilities which enhance desirable echoes. The algorithm is an element based time domain implementation in which beam data that is formed in the direction of each interferer is ...
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Modern, active sonar AGC design considerations
ICASSP '84. IEEE International Conference on Acoustics, Speech, and Signal Processing, 1984The following identifies key elements of the AGC design problem for active sonars. Because the character of the background noise and of the echo are highly dependent on a sonar environment that varies from place to place and from hour to hour, the signal statistics are unknown. Researchers have left the area of AGC design to practitioners; such designs
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Whales and Sonar: Environmental Exemptions for the Navy’s Mid-Frequency Active Sonar Training
2021Mid-frequency active (MFA) sonar emits pulses of sound from an underwater transmitter to help determine the size, distance, and speed of objects. The sound waves bounce off objects and reflect back to underwater acoustic receivers as an echo. MFA sonar has been used since World War II, and the Navy indicates it is the only reliable way to track ...
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Three dimensional height information reconstruction based on mobile active sonar detection
Applied Acoustics, 2020Jiaqi Lu, Zhen Wang
exaly
Integrated waveform for continuous active sonar detection and communication
IET Radar, Sonar and Navigation, 2020Jingwei Yin, Wei Men, Xiao Han
exaly