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The average channel capacity for 3GPP LTE downlink multiuser Multiple Input Multiple Output (MIMO) systems is analyzed in this paper. A packet scheduler is used to exploit the available multiuser diversity in all the three physical domains (i.e., space, time and frequency). A mathematical model is established to derive the channel capacity of multiuser MIMO systems with the frequency domain packet...
Cooperative communication has been recently proposed as a way to improve the performance of wireless communication. However, due to the half duplex constraint, most of the relay networks face a fundamental challenge in terms of multiplexing loss. In this paper, we present an adaptive cooperation via relay selection (ACRS) protocol that improves spectral efficiency. This protocol lets the source transmit...
This paper investigates and proposes the techniques that reduce the number of required feedback channels for implementation of opportunistic scheduling. It is shown that by implementing effective schemes we can exploit significant multiuser diversity gain using a modest number of feedback channels. Simulation based performance analysis is given to demonstrate effectiveness of the proposed schemes...
In, the authors have proposed an analysis on the problem of space-time coding for a synchronized wireless relay networks employing AF (Amplify-and-Forward) protocol which proposes LD (linear dispersion coding) by using linear transformation. In this paper, we extend it to a asynchronous wireless networks and to reduce more processing burden on the relay nodes by allocating interleavers at each relay...
In this paper, we propose an opportunistic relaying with multiple decode-and-forward (DF) relay nodes based on interference cancelation (IC). The relay that succeeds decoding data in the former phase performs IC to decode another data in the current phase without suffering from interference caused by the selected best relay that forwards the data of the former phase. It is shown that the proposed...
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