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16 April 2008 Improving temporal coherence to enhance gain and improve detection performance
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Abstract
Temporal coherence is an important property of many acoustic signals. This paper discusses two fluctuation-based signal processors that improve the temporal coherence of phase and amplitude. Then they exploit the improved coherences to achieve substantial gains, such as, elimination of all noise to achieve exceptionally large "noise-free" automatic detections of temporally coherent signals. Both processors are discussed. One exploits phase fluctuations and the other one exploits amplitude fluctuations. The exploited parameters and signal processors are defined. Results are presented for automatic signal detection of a heavy treaded / tracked vehicle, a helicopter, a fast-boat in shallow coastal water, and a submerged source in the ocean.
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Ronald A. Wagstaff and Heath E. Rice "Improving temporal coherence to enhance gain and improve detection performance", Proc. SPIE 6963, Unattended Ground, Sea, and Air Sensor Technologies and Applications X, 69630T (16 April 2008); https://doi.org/10.1117/12.777281
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