Spread spectrum communications system with transmitted reference

Spread spectrum communications system with transmitted reference

A low complexity and low cost transmitted reference spread spectrum communications system provides several methods of generating a suitable wideband carrier, a method for combining the wideband carrier with a narrowband modulated wideband carrier, and a number of implementations of a simple, inexpen...

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Hauptverfasser: SAULNIER, GARY JUDE, HERSHEY, JOHN ERIK, HLADIK, STEPHEN MICHAEL, ALI, IRFAN, ROSS, JOHN ANDERSON FERGUS, WEIR, MICHAEL PAUL
Format: Patent
Sprache:eng ; fre ; ger
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ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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creator SAULNIER, GARY JUDE
HERSHEY, JOHN ERIK
HLADIK, STEPHEN MICHAEL
ALI, IRFAN
ROSS, JOHN ANDERSON FERGUS
WEIR, MICHAEL PAUL
description A low complexity and low cost transmitted reference spread spectrum communications system provides several methods of generating a suitable wideband carrier, a method for combining the wideband carrier with a narrowband modulated wideband carrier, and a number of implementations of a simple, inexpensive receiver for the transmitted reference communications system. The transmitter includes a balanced modulator for modulating a wideband spreading signal with a narrowband message signal to generate a wideband carrier. A signal combiner combines the wideband carrier with a narrowband modulated wideband carrier to generate a transmitted reference spread spectrum signal. The receiver includes a selectable time delay device (21) having a plurality of taps for receiving a detected received signal from the transmitter. A tap selector (22) selects a delayed signal from the selectable time delay device. A mixer (23) combines output signals of the selectable time delay device and the tap selector, and a leaky integrator (24) receives the mixer output signal and controls the tap selector. The leaky detector generates the narrowband message signal.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
title Spread spectrum communications system with transmitted reference
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