A SIGNALLING METHOD IN A RADIO COMMUNICATION SYSTEM, AND TRANSMITTERS, RECEIVERS AND REPEATERS FOR IMPLEMENTING THE METHOD

摘要

A transmitter outputs a radio signal formed from a first baseband signal incorporating a synchronisation signal. The recipient obtains a secon d baseband signal from the received radio signal, detects the synchronisation signal in a portion of the second baseband signal in order to compute synchronisation parameters and/or parameters for estimating a radio transmission channel, and uses the computed parameters to demodulate another portion of the second baseband signal and extract the transmitted information from it. The synchronisation signal contains a synchronisation pattern selected by the transmitter on the basis of signalling information t o be supplied to the second station. The receiver searches several patterns in th e second baseband signal in order to obtain the signalling information dependi ng on the detected pattern.