Accession Number : ADD002214

Title :   FFT Processor Utilizing Variable Length Shift Registers.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Chwastyk,Adolph M

Report Date : 01 Jan 1974

Pagination or Media Count : 12

Abstract : The patent relates to a processor for radar and multichannel sonar spectral analysis of band-limited input signals based on a shift register implementation of a fast Fourier transform algorithm coupled with a single flow-through arithmetic unit. Speed is obtained by using an organization that performs the rapid data reordering required for execution of the algorithm. A post-processing unit is used to increase the quality of estimation of line spectra in statistically short term spectra. The unit can be used either as an integrator or as a first order recursive filter. The post-processing unit is implemented in a flowing point format to maintain the dynamic range.

Descriptors :   *Data processing equipment, *Patents, Spectrum analyzers, Shift registers, Fourier transformation, Algorithms, Sonar signals, Radar signals, Power spectra, Signal processing

Subject Categories : Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE