초록 ▼

Low probability of marine mammal impact (LPMMI) sound signals have a modulation component selected to reduce a behavioral response from a marine mammal from that which would occur when transmitting another sound signal having approximately the same time duration component, approximately the same ban

Low probability of marine mammal impact (LPMMI) sound signals have a modulation component selected to reduce a behavioral response from a marine mammal from that which would occur when transmitting another sound signal having approximately the same time duration component, approximately the same bandwidth component, and approximately the same center frequency component as the LPMMI waveform but having a modulation component comprising a frequency modulation.

대표청구항 ▼

What is claimed is: 1. A sonar system, comprising: a low probability of marine mammal impact waveform generator adapted to generate a low probability of marine mammal impact (LPMMI) waveform having a modulation component; and a sonar transmitter coupled to the waveform generator and configured to t

What is claimed is: 1. A sonar system, comprising: a low probability of marine mammal impact waveform generator adapted to generate a low probability of marine mammal impact (LPMMI) waveform having a modulation component; and a sonar transmitter coupled to the waveform generator and configured to transmit an LPMMI sound signal into the water in accordance with the LPMMI waveform, wherein the LPMMI waveform comprises a low probability of intercept (LPI) waveform having a spread spectrum, and wherein the LPMMI waveform has a center frequency component in the range of 2500 to 6000 Hertz, a bandwidth component in the range of 500 to 2500 Hertz, and a time duration component in the range of 10 msec to 1.5 seconds, wherein the modulation component of the LPMMI waveform is selected to reduce a behavioral response from a marine mammal by causing the associated LPMMI sound signal to sound unlike a killer whale sound as perceived by the marine mammal as compared to a behavioral response and associated marine mammal perception that would occur when transmitting another sound signal in accordance with another waveform having approximately the same time duration component, approximately the same bandwidth component, and approximately the same center frequency component as the LPMMI waveform but having a modulation component comprising a frequency modulation. 2. The sonar system of claim 1, wherein the LPMMI waveform comprises at least one of an M-sequence pseudo random phase encoded signal, a Barker code phase encoded signal, a Welti code phase encoded signal, a Gold code phase encoded signal, or a genetic algorithm phase encoded signal. 3. The sonar system of claim 1, wherein the LPMMI waveform has a center frequency component of about 3500 Hertz, a bandwidth component of about 1000 Hertz, and a time duration component of about one second. 4. The sonar system of claim 1, wherein the LPMMI waveform comprises an M-sequence pseudo random phase encoded signal. 5. The sonar system of claim 4, wherein the LPMMI waveform has a center frequency component of about 3500 Hertz, a bandwidth component of about 1000 Hertz, and a time duration component of about one second. 6. The sonar system of claim 4, wherein the LPMMI waveform has a center frequency component in the mid frequency range of 2500 to 6000 Hertz, a bandwidth component in the range of 500 to 2500 Hertz, and a time duration component in the range of the range of 10 msec to 1.5 seconds. 7. The sonar system of claim 1, wherein the LPMMI waveform comprises a genetic algorithm phase encoded signal. 8. The sonar system of claim 7, wherein the LPMMI has a center frequency component of about 3500 Hertz, a bandwidth component of about 1000 Hertz, and a time duration component of about one second. 9. The sonar system of claim 7, wherein the LPMMI waveform has a center frequency component in the mid frequency range of 2500 to 6000 Hertz, a bandwidth component in the range of 500 to 2500 Hertz, and a time duration component in the range of 10 msec to 1.5 seconds. 10. The sonar system of claim 7, wherein the genetic algorithm is selected to improve a correlation of a received sound signal. 11. The sonar system of claim 7, wherein the genetic algorithm is selected to improve a detection accuracy, a localization accuracy, a tracking accuracy, or a classification accuracy provided by the sonar system. 12. The sonar system of claim 7, wherein the genetic algorithm is selected to increase a probability of detection of the sonar system or to reduce a false alarm rate of the sonar system. 13. The sonar system of claim 7, wherein the genetic algorithm is selected to reduce an acoustic power transmitted by the sonar system. 14. The sonar system of claim l, further comprising: a sonar receiver adapted to receive a sound signal associated with the transmitted sound signal and to generate a conditioned signal in accordance with the received sound signal; and a correlation processor adapted to correlate the conditioned signal with a version of the LPMMI waveform and to generate a correlated signal accordingly; and at least one of: a detection processor adapted to detect a target and to provide a detection signal in response to the correlated signal, a localization processor adapted to localize the target in response to the detection, or classification processor adapted to classify the target in response to the detection. 15. The sonar system of claim 1, wherein the a low probability of marine mammal impact waveform generator is further adapted to generate another low probability of marine mammal impact (LPMMI) waveform having at least one of: a different modulation component, a different time duration component, a different bandwidth component, or a different center frequency component, and wherein the sonar transmitter is further adapted to transmit another sound signal into the water in accordance with the another low probability of marine mammal impact waveform. 16. A method of target detection used in a sonar system; comprising: generating a low probability of marine mammal impact (LPMMI) waveform having a modulation component; and transmitting an LPMMI sound signal into the water in accordance with the LPMMI waveform, wherein the LPMMI waveform comprises a low probability of intercept (LPI) waveform having a spread spectrum, and wherein the LPMMI waveform has a center frequency component in the range of 2500 to 6000 Hertz, a bandwidth component in the range of 500 to 2500 Hertz, and a time duration component in the range of 10 msec to 1.5 seconds, wherein the modulation component of the LPMMI waveform is selected to reduce a behavioral response from a marine mammal by causing the associated LPMMI sound signal to sound unlike a killer whale sound as perceived by the marine mammal as compared to a behavioral response and associated marine mammal perception that would occur when transmitting another sound signal in accordance with another waveform having approximately the same time duration component, approximately the same bandwidth component, and approximately the same center frequency component as the LPMMI waveform but having a modulation component comprising a frequency modulation. 17. The sonar system of claim 16, wherein the LPMMI waveform comprises at least one of an M-sequence pseudo random phase encoded signal, a Barker code phase encoded signal, a Welti code phase encoded signal, A Gold code phase encoded signal, or a genetic algorithm phase encoded signal. 18. The method of claim 16, wherein the LPMML waveform has a center frequency component of about 3500 Hertz, a bandwidth component of about 1000 Hertz, and a time duration component of about one second. 19. The method of claim 16, wherein the LPMMI waveform comprises an M-sequence pseudo random phase encoded signal. 20. The method of claim 19, wherein the LPMMI has a center frequency component of about 3500 Hertz, a bandwidth component of about 1000 Hertz, and a time duration component of about one second. 21. The method of claim 19, wherein the LPMMI has a center frequency component of 2500 to 6000 Hertz, a bandwidth component in the range of 500 to 2500 Hertz, and a time duration component in the range of the range of 10 msec to 1.5 seconds. 22. The method of claim 16, wherein the LPMMI waveform comprises a genetic algorithm phase encoded signal. 23. The method of claim 22, wherein the LPMMI has a center frequency component of about 3500 Hertz, a bandwidth component of about 1000 Hertz, and a time duration component of about one second. 24. The method of claim 22, wherein the LPMMI waveform has a center frequency component in the range of 2500 to 6000 Hertz, a bandwidth component in the range of 500 to 2500 Hertz, and a time duration component in the range of 10 msec to 1.5 seconds. 25. The method of claim 22, wherein the genetic algorithm is selected to optimize a correlation of a received sound signal. 26. The method of claim 22, wherein the genetic algorithm is selected to improve a detection accuracy, a localization accuracy, a tracking accuracy, or a classification accuracy provided by the sonar system. 27. The method of claim 22, wherein the genetic algorithm is selected to increase a probability of detection of the sonar system or to reduce a false alarm rate of the sonar system. 28. The method of claim 22, wherein the genetic algorithm is selected to reduce an acoustic power transmitted by the sonar system. 29. The method of claim 16, further comprising: receiving a sound signal associated with the transmitted sound signal; generating a received waveform in accordance with the received sound signal; correlating the received waveform with a version of the LPMMI waveform to provide a correlation signal; and at least one of: detecting a target and providing a detection signal in response to the correlation signal to provide a detection signal, localizing the target in response to the detection signal, or classifying a target in response to the detection signal. 30. The method of claim 16, further comprising: generating another low probability of marine mammal impact (LPMMI) waveform having at least one of: a different modulation component, a different time duration component, a different bandwidth component, or a different center frequency component; and transmitting the another sound signal into water in accordance with the another low probability of marine mammal impact waveform.