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METHODS AND APPARATUSES USING FILTER BANKS FOR MULTI-CARRIER SPREAD SPECTRUM SIGNALS

United States Patent Application

20160191114
A1
View the Complete Application at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
A transmitter includes a synthesis filter bank to spread a data symbol to a plurality of frequencies by encoding the data symbol on each frequency, apply a common pulse-shaping filter, and apply gains to the frequencies such that a power level of each frequency is less than a noise level of other communication signals within the spectrum. Each frequency is modulated onto a different evenly spaced subcarrier. A demodulator in a receiver converts a radio frequency input to a spread-spectrum signal in a baseband. A matched filter filters the spread-spectrum signal with a common filter having characteristics matched to the synthesis filter bank in the transmitter by filtering each frequency to generate a sequence of narrow pulses. A carrier recovery unit generates control signals responsive to the sequence of narrow pulses suitable for generating a phase-locked loop between the demodulator, the matched filter, and the carrier recovery unit.
MORADI, HUSSEIN (AMMON, ID), FARHANG, BEHROUZ (SALT LAKE CITY, UT), KUTSCHE, CARL A. (IDAHO FALLS, ID)
15/ 061,157
March 4, 2016
GOVERNMENT RIGHTS [0002] This invention was made with government support under Contract Number DE-AC07-051D14517 awarded by the United States Department of Energy. The government has certain rights in the invention.