Dual-Hop Amplify-and-Forward Relay Systems with EGC over M2M Fading Channels Under LOS Conditions: Channel Statistics and System Performance Analysis
Batool Talha, Patzold Matthias · InTech eBooks · 2013
The recently growing popularity of cooperative diversity [1–3] in wireless networks is due to its ability to mitigate the deleterious fading effects. By utilizing the existing resources of the network, a spatial diversity gain can be achieved without any extra cost resulting from the deployment of a new infrastructure. The fundamental principle of cooperative relaying is that several mobile stations in a network collaborate together to relay the transmit signal from the source mobile station to the destination mobile station. In the simplest mode of operation, the relay nodes just amplify the received signal and forward it towards the destination mobile station. They can also first decode the received signal, encode it again, and then forward it. In both cases, multiple copies of the same signal reach the destination mobile station, which can be combined to achieve a diversity gain by exploiting the virtual antenna array. In addition to the spatial diversity gain, cooperative relaying promises increased capacity, improved connectivity, and a larger coverage range [4–6].