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METHOD OF DIFFERENTIAL-PHASE/ABSOLUTE-AMPLITUDE POLAR QAM

United States Patent Application

20070183536
A1
View the Complete Application at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A method of quadrature amplitude modulation involving encoding phase differentially and amplitude absolutely, allowing for a high data rate and spectral efficiency in data transmission and other communication applications, and allowing for amplitude scaling to facilitate data recovery; amplitude scale tracking to track-out rapid and severe scale variations and facilitate successful demodulation and data retrieval; 2.sup.N power carrier recovery; incoherent demodulation where coherent carrier recovery is not possible or practical due to signal degradation; coherent demodulation; multipath equalization to equalize frequency dependent multipath; and demodulation filtering.
DIMSDLE, JEFFREY WILLIAM (OVERLAND PARK, KS)
HONEYWELL FEDERAL MANUFACTURING & TECHNOLOGIES, LLC (KANSAS CITY MO)
11/ 734,943
April 13, 2007
FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT PROGRAM [0002] The present invention was developed with support from the U.S. government under Contract No. DE-AC04-01AL66850 with the U.S. Department of Energy. Accordingly, the U.S. government has certain rights in the present invention.