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Transmit diversity generally requires more than one antenna at the transmitter. But many wireless devices are limited by size or hardware complexity to one antenna. Recently, a new class of methods called cooperative communication has been proposed that enables single-antenna mobiles in multi-user environment to share their antennas and form a virtual multiple-antenna transmitter that allow them to...
In this paper, a cross-layer design framework for multi-input multi-output (MIMO)/orthogonal frequency division multiplexing (OFDM) based wireless local area networks (WLANs) is proposed. In contrast to conventional systems where the medium access control (MAC) and physical (PHY) layers are separately optimized, our proposed methodology jointly designs a multi-packet reception (MPR) based protocol...
In this paper, we propose a novel cooperative relay network configuration with spatial multiplexing and beamforming. The proposed system configuration is based on two-hop amplify-forward relay protocol for its low complexity and easy implementation. In our work, we deduce the closed-form formulas of the system capacity, and under SNR maximizing and capacity maximizing criterions, we compare and analyze...
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