A beamspace-time interference cancelling CDMA receiver for sectoredcommunications in a multipath environment

摘要

A beamspace-time (BT) receiver is proposed for interferencensuppression and multipath diversity reception in sectored wireless codendivision multiple access communications. The scheme involves two stages.nFirst, a set of adaptive space-time diversity processors, in the form ofnbeamformer-correlator pairs, is constructed which provides effectivensuppression of unwanted interference and reception of signals from anprescribed space-time region. Second, the output data obtained by thesenprocessors are maximum ratio combined to capture the signal multipathncomponents coherently. The proposed BT receiver is blind in that nontraining signal is required. The only information required is thensignature sequence, timing and a rough estimate of the angle of arrivalnof the signal for selecting the sector of interest