How to solve the problem of bad performance of cooperative protocols at Low SNR
EURASIP Journal on Advances in Signal Processing
Recovering Multiplexing Loss through Concurrent Decode-and-Forward (DF) Relaying
Wireless Personal Communications: An International Journal
Joint beamforming and power control for multiantenna relay broadcast channel with QoS constraints
IEEE Transactions on Signal Processing
Outage probability-based power and time optimization for relay networks
IEEE Transactions on Signal Processing
Linear detection for the nonorthogonal amplify and forward protocol
IEEE Transactions on Wireless Communications
Impact of CSI on distributed space-time coding in wireless relay networks
IEEE Transactions on Wireless Communications
Max-min relay selection for legacy amplify-and-forward systems with interference
IEEE Transactions on Wireless Communications
A comprehensive study of repetition-coded protocols in multi-user multi-relay networks
IEEE Transactions on Wireless Communications
Quantifying the loss of compress-forward relaying without Wyner-Ziv coding
IEEE Transactions on Information Theory
D-MG tradeoff and optimal codes for a class of AF and DF cooperative communication protocols
IEEE Transactions on Information Theory
Relay selection issues for amplify-and-forward cooperative systems with interference
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Amplify and forward for correlated data gathering over hierarchical sensor networks
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
On the diversity gain of AF and DF relaying with noisy CSI at the source transmitter
IEEE Transactions on Information Theory
On the diversity: multiplexing tradeoff in multiple-relay network
IEEE Transactions on Information Theory
Relay selection for secure cooperative networks with jamming
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Near-optimal relaying strategy for cooperative broadcast channels
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
On the diversity gain in cooperative relaying channels with imperfect CSIT
IEEE Transactions on Communications
Coding for the nonorthogonal amplify-and-forward cooperative channel
IEEE Transactions on Information Theory
Relay scheduling in the half-duplex Gaussian parallel relay channel
IEEE Transactions on Information Theory
On the diversity order of non-orthogonal amplify-and-forward over block-fading channels
IEEE Transactions on Wireless Communications
On the DMT-optimality of nondynamic DF relaying in asymmetric Nakagami fading channels
IEEE Transactions on Information Theory
Compress-forward relaying with quantized channel state feedback
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
A relay assisted cooperative transmission protocol for wireless multiple access systems
IEEE Transactions on Communications
End-to-end average BER in multihop wireless networks over fading channels
IEEE Transactions on Wireless Communications
IEEE Transactions on Information Theory
On the distortion exponents of layered broadcast transmission in multi-relay cooperative networks
IEEE Transactions on Signal Processing
Approaching the optimal diversity-multiplexing tradeoff in a four-node cooperative network
IEEE Transactions on Wireless Communications
On the diversity-multiplexing tradeoff of amplify-and-forward half-duplex relaying
IEEE Transactions on Communications
A New Relay and Jammer Selection Schemes for Secure One-Way Cooperative Networks
Wireless Personal Communications: An International Journal
Hi-index | 755.33 |
In a slow-fading channel, how to find a cooperative diversity scheme that achieves the transmit diversity bound is still an open problem. In fact, all previously proposed amplify-and-forward (AF) and decode-and-forward (DF) schemes do not improve with the number of relays in terms of the diversity-multiplexing tradeoff (DMT) for multiplexing gains r higher than 0.5. In this work, the class of slotted amplify-and-forward (SAF) schemes is studied. First, an upper bound on the DMT for any SAF scheme with an arbitrary number of relays N and number of slots M is established. Then, a sequential SAF scheme that can exploit the potential diversity gain in the high multiplexing gain regime is proposed. More precisely, in certain conditions, the sequential SAF scheme achieves the proposed DMT upper bound which tends to the transmit diversity bound when M goes to infinity. In particular, for the two-relay case, the three-slot sequential SAF scheme achieves the proposed upper bound and outperforms the two-relay nonorthorgonal amplify-and-forward (NAF) scheme of Azarian for multiplexing gains r les 2/3. Numerical results reveal a significant gain of our scheme over the previously proposed AF schemes, especially in high spectral efficiency and large network size regime.