METHOD AND DEVICE FOR THE ANTENNA SELECTION IN A DIGITAL TELECOMMUNICATION SYSTEM

摘要

Method for antenna selection in the fixed radio station (RFP) of a TDMA digital telecommunication system set up by a plurality of radiomobile units (PP) and said fixed radio station (RFP) which at its turn includes means adapted to carry out the correlation operation at the moment of receiving each time slot of the frame of said digital signal and means for the selection on one antenna or of a plurality of antennas to which are connected. The method including the steps of: a) verifying if the correlation operation carried out has been successful; b) in the case of missed correlation, scanning in sequences of all available antennas and measuring the received field strength or RSSI; c) compiling of a table containing for each antenna the measured RSSI value; d) verifying if the power variability of the detected signal at each antenna within the time slot period stays in a prefixed range; e) in the affirmative case, verifying if the power variability among the different antennas stays in a second prefixed range comparing the data contained in the aforesaid table; f) if verification of previous step has a negative result, starting the selection of the antenna/s and using a criterion that takes into account the result of comparison mentioned in the previous step.