Elements of information theory
Elements of information theory
Fundamentals of wireless communication
Fundamentals of wireless communication
Collaborative Synchronization for Signal Reinforcement in Sensor Networks
AINA '07 Proceedings of the 21st International Conference on Advanced Networking and Applications
Minimum Error Probability Cooperative Relay Design
IEEE Transactions on Signal Processing
Multinode Cooperative Communications in Wireless Networks
IEEE Transactions on Signal Processing
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Space-time diversity enhancements using collaborative communications
IEEE Transactions on Information Theory
Capacity and lattice strategies for canceling known interference
IEEE Transactions on Information Theory
A simple Cooperative diversity method based on network path selection
IEEE Journal on Selected Areas in Communications
Cooperative transmission in a wireless relay network based on flow management
IEEE Transactions on Communications
Grouping Algorithm for Partner Selection in Cooperative Transmission
Wireless Personal Communications: An International Journal
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We investigate the relaying problem in parallel relay networks consisting of a source sending information to a destination via multiple relays. To exploit the broadcasting nature of the wireless channel, the source broadcasts to the relays and the relays forward the decoded information to the destination. The flow rates on all links in the network are selected to minimize the average transmit power required. We consider two optimal protocols, respectively in which the relays forward the decoded information phase-synchronously and phase-asynchronously. It turns out that not all relays forward information in the optimal phase-asynchronous protocol. Using this fact, we propose a sub-optimal protocol employing at most two relays. In phase-synchronous relaying, the optimal protocol gives around 1dB and over 3dB improvements compared at the outage probability of 10-4 with respect to the single-relay optimal protocol at low-rate and high-rate requirements, respectively. Again, we propose a two-relay sub-optimal protocol for phase-synchronous transmission. Simulation results indicate that these sub-optimal protocols give performances that are close to the performances of the optimal protocols and superior to that of the single-relay optimal protocol.