Accession Number : ADD010887

Title :   Signal Processing System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kijesky,M M ; Bogle,C T

Report Date : 04 Oct 1983

Pagination or Media Count : 6

Abstract : A signal processing system and technique is disclosed for detecting the presence of a desired frequency signal particularly that of a sine wave, in a noisy environment. The signal mixed with noise is received and analyzed by a Fast Fourier Transform spectrum analyzer the output of which is indicative of instantaneous signal phase. The output of the spectrum analyzer is digitally processed to produce a series of average instantaneous signal values based upon the instantaneous signal phase and a statistical estimate of its rate of change, the values being representative of the relative signal strengths for a progression of phase reference values between 0 deg. and 360 deg. The desired signal is detected when an average instantaneous signal value exceeds a threshold instantaneous signal value exceeds a threshold value determined empirically based upon a certain probability of detection and false alarm rate. (Author)

Descriptors :   *Patents, *Signal processing, *Sine waves, *Spectrum analyzers, Fast Fourier transforms, Threshold effects, Strength(General), Probability, False alarms, Detection, Value, Frequency, Signals, Rates

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE