V. V. Kudriashov
ABSTRACT
The generation of acoustic images is an important task in area of acoustic monitoring. A wide range of applications is associated to the task of detection and processing of non-stationary random Wiener acoustic signal. Three variants of the criterion were obtained according to the maximum likelihood method. The variants are obtained with respect to physically existing assumptions. One of them is expressed as relation of derivatives of probability density function of mix of desired signal with non-stationary random Wiener interferences to signal of interferences only. Two of them are based on statement that the difference between the counts of Wiener signal has normal distribution. In order to reduce the computational cost in processing of the received signals, it is proposed to use the third one as simple, technically feasible criterion for detection-measurement. The paper reveals how to obtain detection criterion for estimation of non-stationary random Wiener signal in case of non-stationary interferences. The paper includes test results of acoustic camera equipment.
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