Open AccessOutage analysis of OFDM based cognitive radio network with full duplex relay selection
Author(s) -
Rajkumar Samikkannu,
Thiruvengadam Jayaraman S.
Publication year - 2016
Publication title -
iet signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.384
H-Index - 42
eISSN - 1751-9683
pISSN - 1751-9675
DOI - 10.1049/iet-spr.2016.0100
Subject(s) - relay , orthogonal frequency division multiplexing , cognitive radio , computer science , subcarrier , node (physics) , underlay , interference (communication) , computer network , relay channel , cognitive network , multiplexing , electronic engineering , signal to noise ratio (imaging) , telecommunications , engineering , wireless , power (physics) , physics , channel (broadcasting) , structural engineering , quantum mechanics
In this study, outage performance of orthogonal frequency division multiplexing (OFDM) based underlay cognitive radio (CR) network is analysed. By incorporating full duplex relay selection with amplify and forward relaying strategy, the CR network improves the throughput in the presence of primary user interference. The best relay selection per subcarrier is performed based on the maximum of minimum signal to interference plus noise ratio between source to relay node and relay to destination node. The primary interference signal is modelled as a sparse vector whose non‐zero elements follow the Gaussian distribution. Closed form analytical expressions are derived for the end‐to‐end outage probability of the proposed network and compared with the network operates in half duplex relay selection. It is investigated that the OFDM based CR network with full duplex relay selection achieves higher data rates than the existing CR network. Simulation results are given to validate the derived analytical expressions.