Accession Number : ADA310353

Title :   New Approaches to Non-Stationary Signal Analysis and Applications.

Descriptive Note : Final technical rept. Sep 92-Dec 95,

Corporate Author : RHODE ISLAND UNIV KINGSTON DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Kumaresan, Ramdas

PDF Url : ADA310353

Report Date : DEC 1995

Pagination or Media Count : 7

Abstract : We addressed the problem of resolving signals that are closely spaced in frequency using short data segments. Such problems are of interest in electronic warfare and for locating the sources of electromagnetic radiation such as radar and communication devices. Effective, computationally efficient methods of high resolution parameter estimation were developed. The performance of the algorithms were predicted by theoretical results and verified by computer simulations. We also addressed the problem of tracking signals whose spectrum was varying with time. Signals were assumed to consist of multiple time varying signal components and improved methods of residual signal analysis were developed to isolate and track the individual components. The methods were applied to real world signals such as voiced speech to decompose them into their harmonic components. During this period two PhD theses were completed. The research results were published in the form of ten conference publications and six journal publications.

Descriptors :   *SIGNAL PROCESSING, *ELECTRONIC WARFARE, ALGORITHMS, COMPUTERIZED SIMULATION, PARAMETERS, HARMONICS, COMMUNICATION EQUIPMENT, TRACKING, HIGH RESOLUTION, ESTIMATES, DECOUPLING, SPEECH ANALYSIS, FOURIER ANALYSIS.

Subject Categories : Countermeasures

Distribution Statement : APPROVED FOR PUBLIC RELEASE