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:
Aug. 27, 2002
Filed:
Dec. 15, 2000
Randy L. Turcotte, Tempe, AZ (US);
Stephen Chihhung Ma, Mesa, AZ (US);
Matthew A. Ronning, Scottsdale, AZ (US);
Keith V. Warble, Chandler, AZ (US);
Peter O. Okrah, Chandler, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A method and apparatus for generating digitally modulated signals in which a serial data stream of digital signals to be modulated ( ) is provided, the serial data stream being converted into real and imaginary components ( ) which are then converted into a complex polar signal ( ) representing the serial data stream. A carrier of appropriate frequency is generated by an infinite impulse response filter ( ) and the polar signal is mixed with the output of the infinite impulse response filter to provide a representation of the complex polar signal modulated at the frequency generated by the infinite impulse response filter ( ). Subsequently the imaginary component of the resulting representation is stripped from the signal ( ) and the real component of the resulting representation is applied to a digital to analog converter ( ) to produce an analog version of the serial data stream.