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In this paper, we propose a novel scheme that joints two-level spreading OFDM and beam forming. For further interference suppression, we assign a proper spreading code at transmitter and employ the Minimum Mean Square Error - MUltiuser Detection (MMSE-MUD) equalizer at receiver. Simulation results show that the proposed system outperforms the conventional two-level spreading OFDM system under multipath...
Recent work on wireless beamforming has focused on multiuser diversity effects, where terminals in a cellular system are chosen opportunistically from a pool of terminals based on their responses to test beams. Orthogonality between the test beams is typically chosen to aid subsequent interference-free transmission to the corresponding terminals. However, much of this work assumes that i) the pool...
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