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:
Nov. 19, 2002
Filed:
Sep. 03, 1999
Wayne H. Bradley, West Chicago, IL (US);
James L. Porter, Oklahoma City, OK (US);
PrairieComm, Inc., Arlington Heights, IL (US);
Abstract
A frame synchronizer for use in a receiver that receives an encoded signal from a transmitter includes a conjugation unit, a delay unit and multiplier coupled together to process the encoded signal. The multiplier multiplies either the received encoded signal by a conjugated, delayed version of the received encoded signal or multiplies a conjugated version of the received encoded signal by a delayed version of the received encoded signal to produce a first product signal. A further multiplier multiplies the first product signal with a locally-stored signal to generate a second product signal. An accumulator accumulates the second product signal over a plurality of bit times to generate an accumulated signal having a magnitude representing a time synchronization offset between the receiver and the transmitter and phase representing a frequency synchronization offset between the receiver and the transmitter. A synchronization correction unit generates a time offset correction and a frequency offset correction from the accumulated signal and these corrections are used to correct offsets between the receiver and the transmitter.