Abstract Two-way relay networks have received lots of attention, thanks to its ability to overcome the loss in the spectral efficiency due to half-duplex transmission. Asymptotic performance analysis can provide valuable insights into practical system designs. However, this is a gap in two-way relay network. In this paper, the asymptotic performance is studied for multi-branch dual-hop two-way amplify-and-forward (AF) relaying networks in independently but not necessarily identically distributed (i.n.i.d.) Nakagami-m fading channels, with arbitrary m ≥ 5 The approximate probability density function (PDF) of the instantaneous dual-hop link power at high SNR region is derived. Then we present the asymptotic outage probability expression, and analyze the diversity order and coding gain. Simulations are performed to verify the tightness of the presented analysis at medium and high SNR regions.
This work was supported by the National Basic Research Program of China (973 Program No. 2012CB316100), the National Natural Science Foundation of China (No. 61032002), and the Fundamental Research Funds for the Central Universities (No. 2010XS21).
Cite this article:
Jing YANG, Pingzhi FAN.Asymptotic analysis of multi-branch two-way amplify-and-forward relaying in Nakagami-m fading with arbitrary fading parameter[J] JMT, 2012,V20(4): 249-254