METHODS OF PHASE RECOVERY IN CELLULAR COMMUNICATION SYSTEMS

摘要

This invention provides a CDMA (IS-95) cellular communication system, in which a base station transmits a common broadcast pilot signal through a sector wide beam and traffic signals through narrower adaptive spatial beams by way of an adaptive antenna array. The present invention further provides methods of recovering the phase mismatch between the pilot and traffic signals received at a mobile station, thereby providing for coherent demodulation. By implementing the phase-recovery process at individual mobile stations, the present invention enables the base station to transmit the traffic signals with optimal power gain and minimal interference.