Abstract
Under the scenario of an underlay cognitive radio network, we propose in this paper an adaptive scheme using transmit power adaptation, switched transmit diversity, and adaptive modulation in order to improve the performance of existing switching efficient schemes (SES) and bandwidth efficient schemes (BES). Taking advantage of the channel reciprocity principle, we assume that the channel state information (CSI) of the interference link is available to the secondary transmitter. This information is then used by the secondary transmitter to adapt its transmit power, modulation constellation size, and used transmit branch. The goal of this joint adaptation is to minimize the average number of switched branches and the average system delay given the fading channel conditions, the required error rate performance, and a peak interference constraint to the primary receiver. We analyze the proposed scheme in terms of the average number of branch switching, average delay, and we provide a closed-form expression of the average bit error rate (BER). We demonstrate through numerical examples that the proposed scheme provides a compromise between the SES and the BES schemes.
| Original language | English |
|---|---|
| Article number | 6244787 |
| Pages (from-to) | 1482-1485 |
| Number of pages | 4 |
| Journal | IEEE Communications Letters |
| Volume | 16 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2012 |
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Keywords
- Adaptive modulation
- and switched diversity
- performance analysis
- power adaptation
- spectrum sharing
ASJC Scopus subject areas
- Modelling and Simulation
- Computer Science Applications
- Electrical and Electronic Engineering
Cite this
Power adaptation for joint switched diversity and adaptive modulation schemes in spectrum sharing systems. / Bouida, Zied; Tourki, Kamel; Ghrayeb, Ali; Qaraqe, Khalid; Alouini, Mohamed Slim.
In: IEEE Communications Letters, Vol. 16, No. 9, 6244787, 2012, p. 1482-1485.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Power adaptation for joint switched diversity and adaptive modulation schemes in spectrum sharing systems
AU - Bouida, Zied
AU - Tourki, Kamel
AU - Ghrayeb, Ali
AU - Qaraqe, Khalid
AU - Alouini, Mohamed Slim
PY - 2012
Y1 - 2012
N2 - Under the scenario of an underlay cognitive radio network, we propose in this paper an adaptive scheme using transmit power adaptation, switched transmit diversity, and adaptive modulation in order to improve the performance of existing switching efficient schemes (SES) and bandwidth efficient schemes (BES). Taking advantage of the channel reciprocity principle, we assume that the channel state information (CSI) of the interference link is available to the secondary transmitter. This information is then used by the secondary transmitter to adapt its transmit power, modulation constellation size, and used transmit branch. The goal of this joint adaptation is to minimize the average number of switched branches and the average system delay given the fading channel conditions, the required error rate performance, and a peak interference constraint to the primary receiver. We analyze the proposed scheme in terms of the average number of branch switching, average delay, and we provide a closed-form expression of the average bit error rate (BER). We demonstrate through numerical examples that the proposed scheme provides a compromise between the SES and the BES schemes.
AB - Under the scenario of an underlay cognitive radio network, we propose in this paper an adaptive scheme using transmit power adaptation, switched transmit diversity, and adaptive modulation in order to improve the performance of existing switching efficient schemes (SES) and bandwidth efficient schemes (BES). Taking advantage of the channel reciprocity principle, we assume that the channel state information (CSI) of the interference link is available to the secondary transmitter. This information is then used by the secondary transmitter to adapt its transmit power, modulation constellation size, and used transmit branch. The goal of this joint adaptation is to minimize the average number of switched branches and the average system delay given the fading channel conditions, the required error rate performance, and a peak interference constraint to the primary receiver. We analyze the proposed scheme in terms of the average number of branch switching, average delay, and we provide a closed-form expression of the average bit error rate (BER). We demonstrate through numerical examples that the proposed scheme provides a compromise between the SES and the BES schemes.
KW - Adaptive modulation
KW - and switched diversity
KW - performance analysis
KW - power adaptation
KW - spectrum sharing
UR - http://www.scopus.com/inward/record.url?scp=84866611738&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84866611738&partnerID=8YFLogxK
U2 - 10.1109/LCOMM.2012.071612.121206
DO - 10.1109/LCOMM.2012.071612.121206
M3 - Article
VL - 16
SP - 1482
EP - 1485
JO - IEEE Communications Letters
JF - IEEE Communications Letters
SN - 1089-7798
IS - 9
M1 - 6244787
ER -