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Cooperation diversity schemes employing space-time block coding (STBC) techniques have been proposed for wireless networks to increase network capacity and coverage even when each node is equipped with a single antenna. Such schemes allow several relay stations distributed in space to assist the transmission between a given source-destination pair. A key design problem in cooperative networks is to...
Distributed orthogonal space-time block code (DOSTBC) designs have the potential to achieve significant diversity gain in relay networks but such designs do not use any channel information at the transmitter to optimize the system performance. When channel information is available fully or partially at the relays, transmit beamforming can be employed to enhance the performance of the wireless relay...
We propose a new method of applying network coding for cooperative wireless networks. The network consists of multiple (M ges 2) users having independent information to be transmitted to a common base station (BS). These users form partners and relay information for each other. The transmission blocks are subject to block-fading with independent fading coefficients for each block. Designed non-binary...
In size constraint terminals like in cellular and sensor networks, cooperative communications have been proposed as one of the most efficient way to exploit the benefits of multiple antenna systems. The achievable rates and resulting diversity gains are dependent on information theoretic block-Markov coding. Practical implementation of this information theoretic code design with network coding, as...
Diversity techniques are very effective tool to increase reception quality. One of the diversity techniques is cooperative balanced space-time block coding which guarantees full diversity for any number of relays. In this work, we extend the cooperative balanced space-time block code family to improve its performance. In the proposed scheme, arbitrary number of codes can be generated to increase the...
Multi-hop relaying has proven to be an effective method of additional spatial diversity on wireless fading channels. This paper propose and analyze a simple technique that Cooperative Transmit Diversity (CTD) can be applicable to multi-hop relay enhanced diversity order to fading relay channels, and furthermore the system using X-OR with STBC half encoding at the relay that offers increased performance...
Distributed space time coding for wireless relay networks when the source, the destination and the relays have multiple antennas have been studied by Jing and Hassibi. In this set-up, the transmit and the receive signals at different antennas of the same relay are processed and designed independently, even though the antennas are colocated. In this paper, a wireless relay network with single antenna...
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