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—This paper addresses the problem of performing orthogonal space-division multiplexing (OSDM) for downlink, point-to-multipoint communications when multiple antennas are utilized at the base station (BS) and (optionally) all mobile stations (MS). Based on a closed-form antenna weight solution for single-user multiple-input multiple-output communications in(More)
Opportunistic beamforming, also called random beamforming, has been proved to be an effective way to utilize spatial resource for downlink of multiuser scheduling systems (P. Viswanath et al., 2002). The basic idea is to artificially create large channel fluctuations among different users by transmitting random weighted signal copies from multiple transmit(More)