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. 08, 1998
Filed:
Nov. 13, 1996
Charles JH. Razzell, Cambridge, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
A method of, and receiver for, receiving and demodulating M-ary FSK symbols, where M equals two or four, comprising over sampling a received signal to obtain sub-symbols which are treated as repeated DBPSK .pi./4DQPSK symbols, respectively. The sub-symbols are applied to a delay and multiply demodulator in which the duration of the delay has been optimised to give M equidistant points on a unit circle. The output from the demodulator comprises log likelihood ratios which are then integrated in an integrating filter to give a maximum likelihood estimate of the bits comprising the symbols transmitted.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile