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:
Mar. 06, 1984
Filed:
May. 19, 1982
Billie M Spencer, Bountiful, UT (US);
William S Cady, Bountiful, UT (US);
John W Zscheile, Jr, Farmington, UT (US);
Sperry Corporation, New York, NY (US);
Abstract
In a digital data acquisition system, there is provided a coherent direct sequence spread spectrum receiving system. The coherent receiving system comprises an independent carrier tracking loop and three independent branches for detecting and locking on to a received psuedonoise data signal. The psuedonoise data signal being transmitted is provided with a time slot or discrete time portion during which no data is modulated onto the carrier. The carrier signal which is not phase modulated with digital data is tracked by the tracking loop so that the absolute phase of the carrier is never lost. The psuedonoise data signals are now recoverable in a coherent direct sequence spread spectrum receiver without the requirement of absolute phase determination or non-coherent detection.