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We consider an uncoordinated ad hoc network in which each multi-antenna transmitter sends multiple independent streams to different receivers in a Poisson field of interferers. We provide exact and approximate outage probability expressions and transmission capacity scaling laws, aiming at investigating the fundamental limits of space division multiple access (SDMA). We first show that superlinear...
Closed loop transmit diversity has already been adopted by 3GPP for MIMO HSDPA in the form of TxAA and its dual stream counterpart, D-TxAA. While both these transmission techniques provide performance gains for single user (SU) scenarios, they both introduce multi-user interference in the downlink in multi-user (MU) scenarios. In this paper, we study the extension of these transmission techniques...
We consider a multi-antenna broadcast channel with more single-antenna receivers than transmit antennas and partial channel state information at the transmitter (CSIT). An adaptive transmit mode switching scheme, in which the base station selects between single-user (TDMA) and multiuser transmission (SDMA) is proposed. In particular, we formulate a framework for distributed mode selection and sum-rate...
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