Abstract
In this paper, the decremental effect of beamforming with feedback delay on the performance of a two-hop amplify-and-forward (AF) relay network over Rayleigh-fading channels is investigated. An antenna configuration in which the source and the destination are equipped with multiple antennas, whereas the relay is equipped with a single antenna, is assumed. We derive new expressions for the outage probability and the average bit error rate (BER), which are useful for a large number of modulation schemes. To gain further insights, simple outage probability and average BER approximations at high signal-to-noise ratio (SNR) are also presented. It is shown that, whenever a feedback delay exists, the network is not capable of offering diversity gains. Furthermore, source and relay power allocation results show significantly different behavior with feedback delay. Numerical results supported by simulations are provided to show that feedback delay can severely degrade the performance of the considered AF relay system.
| Original language | English |
|---|---|
| Article number | 5710995 |
| Pages (from-to) | 1265-1271 |
| Number of pages | 7 |
| Journal | IEEE Transactions on Vehicular Technology |
| Volume | 60 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Mar 2011 |
| Externally published | Yes |
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Keywords
- Amplify-and-forward (AF)
- average bit error rate (BER)
- beamforming
- feedback delay
- relays
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Aerospace Engineering
- Automotive Engineering
- Computer Networks and Communications
- Applied Mathematics
Cite this
Effect of feedback delay on amplify-and-forward relay networks with beamforming. / Suraweera, Himal A.; Tsiftsis, Theodoros A.; Karagiannidis, George K.; Nallanathan, Arumugam.
In: IEEE Transactions on Vehicular Technology, Vol. 60, No. 3, 5710995, 03.2011, p. 1265-1271.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of feedback delay on amplify-and-forward relay networks with beamforming
AU - Suraweera, Himal A.
AU - Tsiftsis, Theodoros A.
AU - Karagiannidis, George K.
AU - Nallanathan, Arumugam
PY - 2011/3
Y1 - 2011/3
N2 - In this paper, the decremental effect of beamforming with feedback delay on the performance of a two-hop amplify-and-forward (AF) relay network over Rayleigh-fading channels is investigated. An antenna configuration in which the source and the destination are equipped with multiple antennas, whereas the relay is equipped with a single antenna, is assumed. We derive new expressions for the outage probability and the average bit error rate (BER), which are useful for a large number of modulation schemes. To gain further insights, simple outage probability and average BER approximations at high signal-to-noise ratio (SNR) are also presented. It is shown that, whenever a feedback delay exists, the network is not capable of offering diversity gains. Furthermore, source and relay power allocation results show significantly different behavior with feedback delay. Numerical results supported by simulations are provided to show that feedback delay can severely degrade the performance of the considered AF relay system.
AB - In this paper, the decremental effect of beamforming with feedback delay on the performance of a two-hop amplify-and-forward (AF) relay network over Rayleigh-fading channels is investigated. An antenna configuration in which the source and the destination are equipped with multiple antennas, whereas the relay is equipped with a single antenna, is assumed. We derive new expressions for the outage probability and the average bit error rate (BER), which are useful for a large number of modulation schemes. To gain further insights, simple outage probability and average BER approximations at high signal-to-noise ratio (SNR) are also presented. It is shown that, whenever a feedback delay exists, the network is not capable of offering diversity gains. Furthermore, source and relay power allocation results show significantly different behavior with feedback delay. Numerical results supported by simulations are provided to show that feedback delay can severely degrade the performance of the considered AF relay system.
KW - Amplify-and-forward (AF)
KW - average bit error rate (BER)
KW - beamforming
KW - feedback delay
KW - relays
UR - http://www.scopus.com/inward/record.url?scp=79952846691&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79952846691&partnerID=8YFLogxK
U2 - 10.1109/TVT.2011.2112786
DO - 10.1109/TVT.2011.2112786
M3 - Article
AN - SCOPUS:79952846691
VL - 60
SP - 1265
EP - 1271
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
SN - 0018-9545
IS - 3
M1 - 5710995
ER -