Resource partitioning with beamforming for the decode-forward relay networks
EURASIP Journal on Wireless Communications and Networking
Signal detection for distributed space-time block coding: 4 relay nodes under quasi-synchronisation
IEEE Transactions on Communications
Exact BER analysis of distributed Alamouti's code for cooperative diversity networks
IEEE Transactions on Communications
IEEE Transactions on Wireless Communications
Distributed GABBA space-time codes in amplify-and-forward relay networks
IEEE Transactions on Wireless Communications
Hard/Soft detection with limited CSI for multi-hop systems
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Single and multiple relay selection schemes and their achievable diversity orders
IEEE Transactions on Wireless Communications
Network beamforming using relays with perfect channel information
IEEE Transactions on Information Theory
A timing synchronization scheme for space-time cooperative relay OFDM system
WOCN'09 Proceedings of the Sixth international conference on Wireless and Optical Communications Networks
An efficient adaptive distributed space-time coding scheme for cooperative relaying
IEEE Transactions on Wireless Communications
Phase compensation for uplink distributed space-time cooperative protocol
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Performance analysis of distributed transmission schemes in cooperative random networks
IEEE Transactions on Wireless Communications
Combination of MRC and distributed space-time coding in networks with multiple-antenna relays
IEEE Transactions on Wireless Communications
Power allocation strategies for distributed space-time codes in two-way relay networks
IEEE Transactions on Signal Processing
Capacity-optimum mode switching strategies over a cooperative relay network
Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication
Cooperative Subcarrier Allocation for an OFDM Relaying System with Grouped Users
Wireless Personal Communications: An International Journal
A Semi-Orthogonal Distributed Alamouti Space-Time Codes Design
Wireless Personal Communications: An International Journal
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Spatial diversity can be induced by using wireless relay stations, which cooperate by amplifying and retransmitting the information received from a source to a destination station. In this context we propose a distributed space-time coding (DSTC) system based on the Alamouti codes. We characterize the symbol error rate of systems with one and two non-regenerative relays using bounds and high signal-to-noise ratio (SNR) approximations. The asymptotic (high SNR) symbol error probability formulas are used to optimize the power allocation in the DSTC system. Furthermore, using the asymptotic symbol error probability formulas we argue that the DSTC system has at least 1.5 times the diversity achieved by point-to-point transmissions with the same bandwidth. Simulations show not only that the DSTC outperforms the amplify-and-forward cooperative system with orthogonal transmissions, but also convolutional encoded one-hop transmissions with the same information rate as the DSTC system. Assuming full channel knowledge at the source and the relays, we find an optimum cooperative system by minimizing the bit error rate of the DSTC system with one and two non-regenerative relays subject to fixed transmit energy constraints at each radio. Numerical results show that the DSTC system with two relays performs very close to the optimum cooperative system.