On the SER of Fixed Gain Amplify-and-Forward Relaying with Beamforming in Nakagami-m Fading

Nan Yang, Maged Elkashlan, Jinhong Yuan, Tingzhi Shen
2010 IEEE Communications Letters  
We derive the exact and asymptotic symbol error rate (SER) of multiple-input multiple-output (MIMO) relaying with a fixed gain amplify-and-forward (AaF) relay in Nakagamifading channels. We demonstrate that both fixed and variable gain relaying achieve the same diversity, which is jointly determined by the number of antennas and the per-hop fading parameters. We further quantify the performance gap between fixed and variable gain relaying in terms of their array gains. We prove that this gap
more » ... ve that this gap diminishes as the first and the second hops exhibit highly asymmetric channel qualities. Index Terms-Multiple-input multiple-output, wireless relaying, beamforming, Nakagami-fading.
doi:10.1109/lcomm.2010.091010.101221 fatcat:57o2ljdiajglxhveo3lyrvplae