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:
Apr. 20, 2010
Filed:
Mar. 17, 2008
Osama Sami Haddadin, Salt Lake City, UT (US);
L. Andrew Gibson, Jr., Riverton, UT (US);
David Scott Nelson, Salt Lake City, UT (US);
Osama Sami Haddadin, Salt Lake City, UT (US);
L. Andrew Gibson, Jr., Riverton, UT (US);
David Scott Nelson, Salt Lake City, UT (US);
L3 Communications Corporation, New York, NY (US);
Abstract
A circuitfor upsampling and upconverting a high rate signal that is divided into M in-phase (I) symbols and M quadrature (Q) symbols. A Nyquist filterupsamples by a factor of k each of the 2M symbols in parallel during one system clock period (CP). The filterhas a plurality of 2kM filter components, that each provides a continuous output. A plurality of multiplierseach upconverts a filter component output with a carrier wave signalthat is output from a numerically controlled oscillator. A plurality of adderseach adds the output of two multipliersto recombine corresponding I and Q samples to output kM samples during a CP. For continuous phase modulation, N parallel bits are input into the filter, upsampled in one CP, and accumulated and modulatedin parallel in one CP. For analog processing, M (I) and M (Q) symbols are input into an FIR filterfor upsampling, and decimated at a MUX/DAC blockfor subsequent analog upconversion.