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Network coding is a promising technology designed to reach the min-cut max-flow capacity in wired network. While in wireless cooperative environments, it has been proved that network coding can also increase the system throughput by taking the advantage of the broadcast nature of electromagnetic waves. In this paper, we establish a 2-source and 2-destination cooperative systems with arbitrary number...
Multi-channel communication protocols in wireless networks usually assume perfect orthogonality between wireless channels or consider only the use of interference-free channels. The first approach may overestimate the performance whereas the second approach may fail to utilize the spectrum efficiently. Therefore, a more realistic approach would be the careful use of interfering channels by controlling...
In this paper, an optimal unitary precoder is designed for an amplify-and-forward (AF) half-duplex relay system to obtain the maximum coding gain while the original ergodic channel capacity for the relay system is kept unchanged. A closed-form design is derived for quadrature amplitude modulation (QAM) signals by employing the properties of Farey sequence in number theory. Simulation results indicate...
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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