| 摘要 |
A wireless communication system comprises a base transceiver station (10) and R remote transceivers (T1, T2) T1... Tr, each of the remote transceivers having multiple antennas (18A-18B, 20A-20B). The base transceiver station has N base station antennas (12A-12B), each of the remote transceivers has M remote antennas (18A-18B, 20A-20B), and N > R. The base transceiver station simultaneously transmits information signals s1...sr to remote transceivers T1...Tr, respectively. The base transceiver station comprises processing means for selecting R discrimination vectors V1...Vr, each of the discrimination vectors having N components. The base transceiver station computes an N-component transmission signal vector U as follows U=E Vi.Si. The transmission signal vector U is transmitted from the base transceiver station, preferably one component of U per base station antenna. The i th remote transceiver Ti receives an M-component signal vector Zi through its M remote antennas, one component of Zi per antenna. The ith remote transceivers computes a reconstructed signal yi from the received signal vector Zi. The discrimination vectors V1...Vr are preferably selected to optimize an efficiency of transmission and the computation of yi preferably optimizes an efficiency of reception. Some embodiments of the present system and method employ time filtering, and some embodiments use frequency filtering.
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