TY - GEN
T1 - Enhancing the performance of spectrum-sharing systems via collaborative distributed beamforming and AF relaying
AU - Afana, Ali
AU - Asghari, Vahid
AU - Ghrayeb, Ali
AU - Affes, Sofiene
PY - 2012
Y1 - 2012
N2 - In this paper, we use a distributed beamforming method in cognitive radio relay networks in an effort to enhance the spectrum efficiency and improve the performance of the cognitive (secondary) system. In particular, we consider a spectrum sharing system where a set of potential relays are employed to help a pair of secondary users in the presence of a licensed (primary) user. A selection relaying scenario in an amplify and forward (AF) scheme is investigated. In this context, we obtain the exact expressions for the cumulative distribution function (CDF) and the moment generating function (MGF) of the equivalent end-to-end SNR at the secondary destination. Then, to analyze the performance, we derive closed-form expressions for the outage probability and bit error rate (BER) over independent and identically distributed (i.i.d.) Rayleigh fading channels. Numerical results demonstrate the efficacy of beamforming in improving the secondary system performance in addition to limiting the interference to the primary users.
AB - In this paper, we use a distributed beamforming method in cognitive radio relay networks in an effort to enhance the spectrum efficiency and improve the performance of the cognitive (secondary) system. In particular, we consider a spectrum sharing system where a set of potential relays are employed to help a pair of secondary users in the presence of a licensed (primary) user. A selection relaying scenario in an amplify and forward (AF) scheme is investigated. In this context, we obtain the exact expressions for the cumulative distribution function (CDF) and the moment generating function (MGF) of the equivalent end-to-end SNR at the secondary destination. Then, to analyze the performance, we derive closed-form expressions for the outage probability and bit error rate (BER) over independent and identically distributed (i.i.d.) Rayleigh fading channels. Numerical results demonstrate the efficacy of beamforming in improving the secondary system performance in addition to limiting the interference to the primary users.
UR - http://www.scopus.com/inward/record.url?scp=84877679082&partnerID=8YFLogxK
U2 - 10.1109/GLOCOM.2012.6503295
DO - 10.1109/GLOCOM.2012.6503295
M3 - Conference contribution
AN - SCOPUS:84877679082
SN - 9781467309219
T3 - Proceedings - IEEE Global Communications Conference, GLOBECOM
SP - 1314
EP - 1319
BT - 2012 IEEE Global Communications Conference, GLOBECOM 2012
T2 - 2012 IEEE Global Communications Conference, GLOBECOM 2012
Y2 - 3 December 2012 through 7 December 2012
ER -