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:
Jan. 31, 2006
Filed:
Apr. 19, 2004
Ehud Reshef, Qiryat Tivon, IL;
Idan Alrod, Tel Aviv, IL;
Ehud Reshef, Qiryat Tivon, IL;
Idan Alrod, Tel Aviv, IL;
Comsys Communications & Signal Processing Ltd., Herzelia, IL;
Abstract
A method and apparatus for performing a radix-4 fast Hadamard transform (FHT) with reduced complexity and for directly determining the maximum output of a fast Hadamard transform using either a radix-4 transform or radix-2 transform without actually generating the outputs. The radix-4 fast Hadamard transform is implemented using only seven operations. To find the maximum value of the output of a fast Hadamard transform and its corresponding index, the N-1 stages of a conventional N stage fast Hadamard transform are computed while a find-maximum stage is inserted in place of the Nstage. The invention also provides a methodology for constructing fast Hadamard transforms of the form Husing radix-4 FHTs and permuting the results to achieve the correct outputs.