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:
May. 26, 1992
Filed:
Apr. 26, 1991
Robert H Cantwell, Sudbury, MA (US);
Raytheon Company, Lexington, MA (US);
Abstract
An apparatus and method for pseudo-random noise (PN) code correlation in a GPS receiver employing sign and magnitude input weighting for each of the in-phase (I) and quadrature-phase (Q) samples of a received PN-code modulated carrier. A programmable R factor provides input A/D sample sign and magnitude weighting control of outside crossing samples for interference rejection of other RF signals interfering with the received PN-code modulated RF carrier. The R factor weighting determines if the A/D samples are from a linear or adaptive A/D converter. In-phase reference (IREF) signals and quadrature-phase reference (QREF) signals, produced by an internally generated PN-code reference, are provided to a plurality of I and Q multi-Y-tap correlator/integrators for correlation with the I and Q samples. The apparatus correlates I and Q samples obtained from IF sampling or baseband sampling of the received PN-code modulated carrier.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile