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. 13, 2007
Filed:
Nov. 17, 2003
Frederick L. Martin, Plantation, FL (US);
Edgar H. Callaway, Boca Raton, FL (US);
Paul E. Gorday, West Palm Beach, FL (US);
David B. Taubenheim, Plantation, FL (US);
Frederick L. Martin, Plantation, FL (US);
Edgar H. Callaway, Boca Raton, FL (US);
Paul E. Gorday, West Palm Beach, FL (US);
David B. Taubenheim, Plantation, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A direct sequence spread spectrum (DSSS) receiver () consistent with certain embodiments has a frequency generator () that generates a local oscillator signal without use of a piezoelectric crystal. A frequency converter () receives the local oscillator signal and mixes the local oscillator signal with a received DSSS signal to produce a down-converted signal. The received DSSS signal is encoded using a first set of DSSS code. A differential chip detector () receives the down-converted signal and converts the down-converted signal to a differentially detected signal. A correlator () receives the differentially detected signal and correlates the detected signal with a set of DSSS codes that are time-shifted from the first set of DSSS codes. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.