Wireless Personal Communications: An International Journal
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In this contribution, four different schemes are suggested for multiple antennas multiple relays and their performances are evaluated and compared via computer simulation. At each relay, maximal ratio combining (MRC) in the receiving side and beamforming in the transmitting side are employed. Amplify and forward (AF), and estimate and forward methods (EF) used for single antenna relays are employed here. Then, the power allocation for the relays are carried out by the distributed beamforming adopted from single antenna relay networks with AF scheme. It can be seen that this method works properly for EF for small SNRs as well.