Outage Analysis of Cognitive Incremental DF Relay Network in Nakagami-m Fading Channels
Yuan Chang, Yonghua Li, Zhongwei Si, Yueming Lu, Jiaru Lin · 2014
In this paper, the exact closed-form outage probability expression is derived for cognitive relay network with incremental decode-and-forward (IDF) protocol in independent non-identically distributed (i.n.i.d.) Nakagami-m fading channels. The outage performance comparisons are made between IDF and DF protocols. Besides, the impact of channel fading parameters is investigated for both secondary transmission links and interference links. The results show that a significant gain can be made by using IDF protocol, especially when the secondary direct link is in good channel condition. Moreover, the outage performance is dominated by the channel quality of the secondary transmission links and is also impacted by the channel quality of the interference links.