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. 09, 1990
Filed:
May. 13, 1988
Applicant:
Inventors:
William T McDavid, Richardson, TX (US);
William W Bryce, Dallas, TX (US);
Talal A Itani, Dallas, TX (US);
Assignee:
Terra Marine Engineering, Inc., Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375 67 ; 375 83 ; 375 86 ; 375 96 ;
Abstract
A phase modulation system includes a phase mapping circuit (218) for mapping binary data into a plurality of discrete phase values in accordance with a predetermined phase modulation scheme. The discrete phase values are then filtered in the phase domain by a filter (220) to provide a filtered output. This filtered output is then digitized and input to a numerically controlled oscillator for phase modulating a carrier.