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Title: Methods and apparatuses using filter banks for multi-carrier spread spectrum signals

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.
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Issue Date:
OSTI Identifier:
Battelle Energy Alliance, LLC (Idaho Falls, ID) INL
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2014 Sep 26
Research Org:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Carrier Recovery in Vestigial Sideband Data Receivers
patent, November 1974

Method and apparatus for embedding auxiliary data in a primary data signal using frequency and time domain processing
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Spread spectrum communication system using DECT protocol
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Filter bank constituting method and filter bank apparatus
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Hybrid TDMA/CDMA system based on filtered multitone modulation
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