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

Abstract

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.

Inventors:

Moradi, Hussein; Farhang, Behrouz; Kutsche, Carl A.

Issue Date:

2016-06-14

Research Org.:

Idaho National Laboratory (INL), Idaho Falls, ID (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1257191

Patent Number(s):

9369866

Application Number:

14/498,035

Assignee:

Battelle Energy Alliance, LLC (Idaho Falls, ID)

Patent Classifications (CPCs):

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04B - TRANSMISSION

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04J - MULTIPLEX COMMUNICATION

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H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04B - TRANSMISSION

H04B1/69 - Spread spectrum techniques
H04B1/707 - using direct sequence modulation
H04B1/709 - Correlator structure
H04B1/7093 - Matched filter type
H04B1/71 - the interference being narrowband interference
H04B2001/70935 - {using a bank of matched fileters, e.g. Fast Hadamard Transform}

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04J - MULTIPLEX COMMUNICATION

H04J11/0023 - {Interference mitigation or co-ordination

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04K - SECRET COMMUNICATION

H04K3/25 - {based on characteristics of target signal or of transmission
H04K3/827 - {using characteristics of target signal or of transmission

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04L - TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION

H04L1/04 - using frequency diversity
H04L2209/24 - Key scheduling, i.e. generating round keys or sub-keys for block encryption
H04L2209/80 - Wireless
H04L5/0021 - {in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA}
H04L9/0816 - {Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use}
H04L9/0875 - {based on channel impulse response [CIR]}

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DOE Contract Number:  

AC07-05ID14517

Resource Type:

Patent

Resource Relation:

Patent File Date: 2014 Sep 26

Country of Publication:

United States

Language:

English

Subject:

42 ENGINEERING; 97 MATHEMATICS AND COMPUTING