Date of Award

Fall 1986

Document Type

Thesis

Department

Electrical & Computer Engineering

Program/Concentration

Electrical Engineering

Committee Director

Shared V. Kanetkar

Committee Member

John W. Stoughton

Committee Member

Stephen A. Zahorian

Call Number for Print

Special Collections LD4331.E55S28

Abstract

A new signal processor for laser velocimeter systems is proposed. The proposed processor incorporates automatic initialization, real time operation, and can efficiently process input signals comprised of as low as 150 photons, with mean oscillation frequency up to 100 MHZ, and input turbulence from 0 to 20%. A bank of digital bandpass filters is employed for the energy spectrum estimation of the input signal. A deterministic model is developed to describe the relationship between the filter output energies and the input signal parameters. The input frequency is estimated by linearly weighting the filter output energies. A spline function approximation approach is used to determine the coefficients that minimize the mean squared error. The same approach is used to develop an error model that evaluates the processor performance. Simulation results demonstrated that the proposed processor measures mean input frequencies with less than 0.5% average error, and provides a minimum measure of turbulence between 0.2 and 0.5%. Compared to other currently existing systems the frequency domain processor is found to be superior in almost all cases.

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In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

DOI

10.25777/s8ew-sv51

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