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:
Jul. 31, 2001
Filed:
Jan. 12, 2000
Kenneth D. Chapman, Surrey, GB;
Xilinx, Inc., San Jose, CA (US);
Abstract
A matched filter arrangement and an FPGA-implemented tap arrangement for a matched filter are described in various embodiments. In an n-tap filter to match a code sequence, each of taps,through (n-,) includes a configurable adder-subtractor. A code storage element is coupled to the adder-subtractor to select either addition or subtraction in accordance with a corresponding bit of the code sequence. The output of the adder-subtractor is coupled to a partial-result storage element, which is part of a chain of partial-result storage elements. The last partial-result storage element in the chain is coupled to the data input of an adder-subtractor in another tap. The last tap includes an adder-subtractor and a single storage element for storage of the final result.