The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 1999
Filed:
Dec. 20, 1996
Applicant:
Inventor:
John S Thayer, Houston, TX (US);
Assignee:
Compaq Computer Corporation, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
708404 ; 708405 ;
Abstract
An apparatus and a method perform an N-point Fast Fourier Transform (FFT) on first and second arrays having real and imaginary input values using a processor with a multimedia extension unit (MEU), wherein N is a power of two. The invention repetitively sub-divides the N-point Fourier Transform into N/2-point Fourier Transforms until only a 2-point Fourier Transform remains. Next, it vector processes the 2-point Fourier Transform using the MEU and cumulates the results of the 2-point Fourier Transforms from each of the sub-divided N/2 Fourier Transforms to generate the result of the N-point Fourier Transform.