Intelligent antenna sharing in cooperative diversity wireless networks
Intelligent antenna sharing in cooperative diversity wireless networks
Performance of Fountain Codes in Collaborative Relay Networks
IEEE Transactions on Wireless Communications
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
Cooperative communication in wireless networks
IEEE Communications Magazine
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
A simple Cooperative diversity method based on network path selection
IEEE Journal on Selected Areas in Communications
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We propose a new cooperative transmission scheme, Opportunistic Fountain (OF), based on rateless codes for half-duplex relaying. In the proposed scheme, only the most appropriate relay is permitted to forward the message using rateless codes, thus as an orthogonal transmission protocol, our scheme does not need to synchronize among distributed relays. Furthermore, the transmitted information can also be heard and used even by relay nodes that fail to accumulate sufficient mutual information. As a result these nodes can decode the information faster, enlarging the transmitter candidate set (TCS), in which the best relay is selected. We first analyze the simplified one-relay version of the proposed protocol, and present closed-form expressions for the outage probability. The analysis reveals that the proposed scheme can achieve a gain of about 2 dB over the traditional method, which is supported by extensive simulations. We then evaluate the protocol performance for larger network sizes through Monte Carlo simulation, which confirms the benefits of the scheme.