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:
Oct. 15, 1996
Filed:
Apr. 19, 1995
James W Lang, Wayne, NJ (US);
GEC-Marconi Electronic Systems Corp., Wayne, NJ (US);
Abstract
A system which receives a pseudonoise sequence signal, quantizes the signal during a fixed increment of time, and passes the quantized signal to a single 'split' correlator channel. The system utilizes sub-correlation products from that single 'split' channel to calculate correlation outputs of other desired correlation channels. Specifically, the 'split' correlator channel includes a pair of shift register strings, with the corresponding stages of each string being of equal length, and with a phase rotator being provided between consecutive stages of the shift register strings. In-phase and quadrature components of the received signal are each provided as inputs to a respective one of the shift register strings, and each shift register string stage is correlated with the pseudonoise sequence. These correlation results are utilized to calculate overall correlation scores for each of two substantially equal subdivisions of a range of frequencies centered around a nominal carrier frequency for the received signal to detect acquisition of the received signal and to select the frequency range subdivision with the greatest correlation.