Optical Signal Processing for ASW
LOCKHEED ELECTRONICS CO INC PLAINFIELD NJ
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Recent advances in sonar signal-processing techniques are expected to lead to significant improvements in the detection and classification capability of future ASW sonar equipment. Both passive and active sonars, and airborne including sonobuoy as well as shipboard systems, can be improved through better signal processing. In all cases, the improvements will result either from obtaining information at a higher rate on a given target or from making better use of the information that enters the sonar. The importance of improved signal processing is especially apparent in the large, high-powered shipboard sonars such as the ANSQS-26 and the ANBQS-6. These sonars, working at peak power levels of 75 kilowatts, represent just about the practical limit to the brute- force approach of extending sonar ranges by increasing peak power levels. The signal-processing techniques to be discussed, however, do offer the possibility of increasing sonar range by substantially raising the average power level through use of the pulse compression techniques that are common in radar, and they can do so without sacrificing other desirable characteristics, such as good range resolution.
- Acoustic Detection and Detectors