Sonar system and process
First Claim
Patent Images
1. A active sonar system for detecting object(s) in the water comprising:
- a transmitter capable of continuously transmitting an acoustic signal;
a receiver capable of receiving a reflected acoustic echo of said acoustic signal from said object(s), and a direct acoustic signal from said transmitter;
wherein said receiver is capable of discriminating between said direct acoustic signal and said acoustic echo signal it receives from said object while said transmitter is transmitting;
wherein said discrimination can occur when the direct acoustic signal is present at 60 dB or more above the acoustic echo signal.
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Abstract
A sonar system and method of use capable of discriminating a direct acoustic signal present at 60 dB or more above the acoustic echo signal.
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Citations
51 Claims
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1. A active sonar system for detecting object(s) in the water comprising:
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a transmitter capable of continuously transmitting an acoustic signal;
a receiver capable of receiving a reflected acoustic echo of said acoustic signal from said object(s), and a direct acoustic signal from said transmitter;
wherein said receiver is capable of discriminating between said direct acoustic signal and said acoustic echo signal it receives from said object while said transmitter is transmitting;
wherein said discrimination can occur when the direct acoustic signal is present at 60 dB or more above the acoustic echo signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A method for detecting sonar signals comprising:
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transmitting an acoustic signal;
receiving, during said transmission of said acoustic signal, a reflected acoustic echo of said acoustic signal from object(s), as well as directly receiving said acoustic signal;
processing a signal of said acoustic echo and said direct acoustic signal in a manner to discriminate between said acoustic echo signal and said direct signal when said direct acoustic signal is present at 60 dB or more above the acoustic echo signal. - View Dependent Claims (41, 42, 43, 44, 45, 46)
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47. A method for detecting sonar signals comprising:
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generating a waveform;
performing waveform shaping;
transmitting said waveform acoustically;
directly receiving said acoustic waveform and reflected echoes of said acoustic waveform;
performing temporal frequency rejection on said received acoustic waveforms;
optionally performing the step of spatially filtering said received acoustic waveform; and
optionally tracking said detected reflected echoes. - View Dependent Claims (48, 49, 50, 51)
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Specification