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:
Feb. 04, 2013
Filed:
Jun. 13, 2010
Ronald D. Mccallister, Scottsdale, AZ (US);
Bruce A. Cochran, Mesa, AZ (US);
Bradley P. Badke, Chandler, AZ (US);
Ronald D. McCallister, Scottsdale, AZ (US);
Bruce A. Cochran, Mesa, AZ (US);
Bradley P. Badke, Chandler, AZ (US);
Intersil Americas Inc., Milpitas, CA (US);
Abstract
A constrained-envelope digital-communications transmitter circuit () in which a binary data source () provides an input signal stream (), a phase mapper () maps the input signal stream () into a quadrature phase-point signal stream () having a predetermined number of symbols per unit baud interval () and defining a phase point () in a phase-point constellation (), a pulse-spreading filter () filters the phase-point signal stream () into a filtered signal stream (), a constrained-envelope generator () generates a constrained-bandwidth error signal stream () from the filtered signal stream (), a delay element () delays the filtered signal stream () into a delayed signal stream () synchronized with the constrained-bandwidth error signal stream (), a complex summing circuit () sums the delayed signal stream () and the constrained-bandwidth error signal stream () into a constrained-envelope signal stream (), and a substantially linear amplifier () amplifies the constrained-envelope signal stream () and transmits it as a radio-frequency broadcast signal ().