Accession Number : AD0763430

Title :   Detection and Initial Tracking of Narrow-Band Signals in Noise.

Descriptive Note : Technical rept.,

Corporate Author : TECHNOLOGY SERVICE CORP SANTA MONICA CALIF

Personal Author(s) : Lank,Gerald W.

Report Date : JUL 1973

Pagination or Media Count : 46

Abstract : Suppose a signal is observed for a time Tsec. It consists of white Gaussian noise and possibly the presence of one or more sine waves or narrow-band signals. It is desired to decide whether any sine waves or narrow-band signals are present; If they are present, their amplitudes and frequencies are of interest if one wishes to track them past the time T. Also they may be of interest for identification purposes. Modeling the sine waves or narrow-band signals as sine waves in all cases, this report presents a tutorial on the subject of detecting the presence of the sine waves and estimating their frequencies and amplitudes. It is shown that the use of a bank of narrow-band filters, each of bandwidth 1/T Hz and separated somewhat closer than 1/T, comes close to detecting the presence of the sine waves in an optimum manner. Near-optimum estimates of the amplitude and frequencies of the sine waves when present can be obtained from this same bank of filters. (Author)

Descriptors :   (*INFORMATION THEORY, SIGNALS), DETECTION, TRACKING, NARROWBAND, PROBABILITY DENSITY FUNCTIONS, MATHEMATICAL PREDICTION, WHITE NOISE

Subject Categories : Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE