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In this paper, we study three cooperative transmission schemes by use of amplify-and-forward (AF) relaying strategies. It is assumed that there is one source, one destination and several AF-relays. First, a parallel-relay strategy is considered wherein the transmitted message from the source is received by each relay independently. Then, the relay retransmit the message by use of AF relaying to the...
In multi-hop packet radio networks with low mobility, forwarding strategies based on the location of the radios are considered to be quite robust and scalable since they consume less network resources for the exchange and storage of network state information than conventional routing. When such geographical forwarding strategies are used over fading channels, the presence of multiple potential forwarding...
Cooperative diversity is a promising technology for future wireless networks. In this paper, we consider a cooperative communication system operating in an amplify-and-forward (AF) mode with an imperfectly-known relay fading channel. It is assumed that a pilot symbol assisted modulation (PSAM) scheme with linear minimum mean square estimator (LMMSE) is used for the channel estimation. A simple and...
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