On building a cooperative communication system: testbed implementation and first results
EURASIP Journal on Wireless Communications and Networking - Special issue on cooperative communications in wireless networks
Alternating opportunistic large arrays in broadcasting for network lifetime extension
IEEE Transactions on Wireless Communications
Distributed transmit beamforming: challenges and recent progress
IEEE Communications Magazine
Cooperative network implementation using open-source platforms
IEEE Communications Magazine
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks
IEEE Transactions on Information Theory
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Asymptotic analysis of multistage cooperative broadcast in wireless networks
IEEE Transactions on Information Theory
Implementing cooperative diversity antenna arrays with commodity hardware
IEEE Communications Magazine
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Cluster transmission, also called Concurrent Cooperative Transmission (CCT) in this paper, enables a collection of power-constrained embedded sensors to transmit as a group and achieve a transmit range that is much greater than the range of a single device. CCT brings a new flexibility to the network layer; for example, CT can be used for load balancing or for overcoming a partition. CCT is also the basis for a fast, contention-free method of broadcasting. A method for achieving cluster transmit time synchronization is described for the non-coherent FSK type of modulation. In this method, nodes derive their synchronization from a received packet. Experimental results are presented for an indoor office environment at 2.4 GHz. Root mean squared (rms) transmit time spreads are reported for a two-hop network as well as for a "ping pong" experiment, which has ten consecutive CCT hops. Examples of CCT range extension are also presented.