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Signal Processing Studies of a Simulated Laser Doppler Velocimetry-Based AcousticSensor

机译：基于模拟激光多普勒测速仪的声学传感器的信号处理研究

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In this report we discuss a possible remote acoustic sensing scheme based onlaser Doppler velocimetry (LDV). The signal characteristics of an LDV signal from single particle scattering are described for differential and reference beam LDV configurations. A model is developed to simulate LDV signals which includes shot noise and random phase and additive noise contributions. Comparisons are made between results obtained from simulated and actual LDV signals using several signal processing techniques. The effects of various noise sources on LDV signal detectability and sensitivities to various optical parameters are studied using power spectral methods and a simulated LDV signal. Enhanced signal detectability in random noise backgrounds is investigated using spectral correlation methods. Results indicate that it may be possible to extend demonstrated LDV-based acoustic sensor sensitivities using higher order processing techniques. (Author)

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