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:
Sep. 05, 1995
Filed:
Jun. 25, 1993
David F Strawn, Marietta, GA (US);
Digital Wireless Corporation, Atlanta, GA (US);
Abstract
An improved correlator or matched filter for binary coefficients is provided which reduces the amount of logic required to indicate the receipt of a predetermined code word. The matched filter includes a plurality of stages of delay, where the number of stages in the delay is preferably equal to the product of the number of chips in the code word and the number of times each chip is sampled. Logic input locations are selected corresponding to transitions in the code word. Digital logic responds to signals available at each logic input for generating data indicating the change in the degree of match between the received signal samples and the code word. An integrator is the last element in the logic and is provided with the foregoing change information. The output of the integrator is then an indication of the degree of match between the most recent set of signal transitions corresponding to the number of transitions in the sampled code word and the code word itself.