Title :
Outage Probability of Cooperative Cognitive Networks Based on Distributed Orthogonal Space–Time Block Codes
Author :
Alotaibi, F.T. ; Chambers, Jonathon A.
Author_Institution :
Adv. Signal Process. Group, Loughborough Univ., Loughborough, UK
Abstract :
Cognitive radio is a novel paradigm that can substantially improve the efficiency of radio spectrum utilization. In this paper, we investigate the outage performance analysis of an amplify-and-forward (AF) relay cooperative network where the relays are equipped with cognitive radios. We consider a space-time-division (STD) protocol based on a distributed extended orthogonal space-time-block-coded (D-EO-STBC) scheme and provide a closed-form expression for outage probability, both with perfect and imperfect spectrum acquisition in Rayleigh fading channels. Simulations show that the new scheme provides better outage performance than the conventional schemes based on a time-division (TD) protocol. The analytical outage probability expressions are finally validated through simulations.
Keywords :
Rayleigh channels; amplify and forward communication; cognitive radio; cooperative communication; orthogonal codes; probability; protocols; space-time block codes; AF relay cooperative network; D-EO-STBC scheme; Rayleigh fading channels; STD protocol; amplify-and-forward relay cooperative network; cooperative cognitive networks; distributed extended orthogonal space-time-block-coded scheme; imperfect spectrum acquisition; outage performance analysis; outage probability; perfect spectrum acquisition; radio spectrum utilization; space-time-division protocol; Cognitive radio; Protocols; Relays; Signal to noise ratio; Vectors; Wireless sensor networks; Cognitive radio; cooperative communications; distributed extended orthogonal space–time block codes (D-EO-STBCs); outage probability; spectrum sharing;
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2012.2208131
