METHOD OF AND SYSTEM FOR DETECTING AVAILABILITY OF CDMA SERVICE

METHOD OF AND SYSTEM FOR DETECTING AVAILABILITY OF CDMA SERVICE

A radiotelephone (121) employs a service detection circuit (125) comprising at least one chip-rate detector (109) that measures the energy of the autocorrelation of a received composite CDMA signal and employs a different time delay for each measurement of the energy. A threshold detection circuit (...

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Hauptverfasser: STORM BRIAN DAVID, FRANK COLIN D, HONKISZ JENNIFER ANN
Format: Patent
Sprache:eng ; pol
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
WIRELESS COMMUNICATIONS NETWORKS
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creator STORM BRIAN DAVID
FRANK COLIN D
HONKISZ JENNIFER ANN
description A radiotelephone (121) employs a service detection circuit (125) comprising at least one chip-rate detector (109) that measures the energy of the autocorrelation of a received composite CDMA signal and employs a different time delay for each measurement of the energy. A threshold detection circuit (127) combines the measured energies and determines that service is available if the combined energies exceeds a threshold, and determines service is unavailable otherwise. The chip-rate detectors (109) can be coupled in parallel to provide simultaneous measurements of the energy of the autocorrelation of the received composite CDMA signal, or a single chip-rate detector (109) can serially measure the energy of the autocorrelation of the received composite CDMA signal.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
WIRELESS COMMUNICATIONS NETWORKS
title METHOD OF AND SYSTEM FOR DETECTING AVAILABILITY OF CDMA SERVICE
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