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A modified adaptive noise cancelling (ANC) hybrid algorithm incorporating techniques of optimal wideband FIR filtering operation and the trimmed mean (TM)-levelization, a dynamic level-based thresholding process, is described in this paper for wideband active sonar echolocation system. This novel technique performs effective suppression of unwanted part of the training data thus localizing potentials...
A compact and fast hardware architecture using a digital approximation and current VLSI technology as a field- programmable gate array (FPGA) structure has been developed for applications in broadband sonar signal detection. The VLSI implementation is sought to maximize the speed of a hybrid algorithm developed previously for the underwater active sonar echolocation system. It consists of two parts:...
Estimators motivated by the minimum mean-square estimation (MMSE) criterion are presented for the estimation of the optical signal intensity in free-space optical (FSO) communication systems impaired by atmospheric-induced scintillation. Joint parameter estimators for the estimation of signal intensities across a photodetector array are investigated. Three scenarios are considered. First, it is assumed...
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