Performance analysis of joint multi-branch switched diversity and adaptive modulation schemes for spectrum sharing systems

Handle URI:
http://hdl.handle.net/10754/575690
Title:
Performance analysis of joint multi-branch switched diversity and adaptive modulation schemes for spectrum sharing systems
Authors:
Bouida, Zied; Qaraqe, Khalid A.; Abdallah, Mohamed M.; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 )
Abstract:
Under the scenario of an underlay cognitive radio network, we propose in this paper two adaptive schemes using switched transmit diversity and adaptive modulation in order to increase the spectral efficiency of the secondary link and maintain a desired performance for the primary link. The proposed switching efficient scheme (SES) and bandwidth efficient scheme (BES) use the scan and wait combining technique (SWC) where a transmission occurs only when a branch with an acceptable performance is found, otherwise data is buffered. In these schemes, the modulation constellation size and the used transmit branch are determined to minimize the average number of switched branches and to achieve the highest spectral efficiency given the fading channel conditions, the required error rate performance, and a peak interference constraint to the primary receiver (PR). For delay-sensitive applications, we also propose two variations of the SES and BES schemes using power control (SES-PC and BES-PC) where the secondary transmitter (ST) starts sending data using a nominal power level which is selected in order to minimize the average delay introduced by the SWC technique. We demonstrate through numerical examples that the BES scheme increases the capacity of the secondary link when compared to the SES scheme. This spectral efficiency improvement comes at the expense of an increased average number of switched branches and thus an increased average delay. We also show that the SES-PC and the BES-PC schemes minimize the average delay while satisfying the same spectral efficiency as the SES and BES schemes, respectively. © 2012 IEEE.
KAUST Department:
Electrical Engineering Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Communication Theory Lab
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
IEEE Transactions on Communications
Issue Date:
Dec-2012
DOI:
10.1109/TCOMM.2012.081512.110520
Type:
Article
ISSN:
00906778
Sponsors:
This work was made possible by NPRP grant No. NPRP 08-152-2-043 and NPRP grant No. NPRP 08-101-2-025 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.
Appears in Collections:
Articles; Electrical Engineering Program; Communication Theory Lab; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorBouida, Zieden
dc.contributor.authorQaraqe, Khalid A.en
dc.contributor.authorAbdallah, Mohamed M.en
dc.contributor.authorAlouini, Mohamed-Slimen
dc.date.accessioned2015-08-24T08:35:56Zen
dc.date.available2015-08-24T08:35:56Zen
dc.date.issued2012-12en
dc.identifier.issn00906778en
dc.identifier.doi10.1109/TCOMM.2012.081512.110520en
dc.identifier.urihttp://hdl.handle.net/10754/575690en
dc.description.abstractUnder the scenario of an underlay cognitive radio network, we propose in this paper two adaptive schemes using switched transmit diversity and adaptive modulation in order to increase the spectral efficiency of the secondary link and maintain a desired performance for the primary link. The proposed switching efficient scheme (SES) and bandwidth efficient scheme (BES) use the scan and wait combining technique (SWC) where a transmission occurs only when a branch with an acceptable performance is found, otherwise data is buffered. In these schemes, the modulation constellation size and the used transmit branch are determined to minimize the average number of switched branches and to achieve the highest spectral efficiency given the fading channel conditions, the required error rate performance, and a peak interference constraint to the primary receiver (PR). For delay-sensitive applications, we also propose two variations of the SES and BES schemes using power control (SES-PC and BES-PC) where the secondary transmitter (ST) starts sending data using a nominal power level which is selected in order to minimize the average delay introduced by the SWC technique. We demonstrate through numerical examples that the BES scheme increases the capacity of the secondary link when compared to the SES scheme. This spectral efficiency improvement comes at the expense of an increased average number of switched branches and thus an increased average delay. We also show that the SES-PC and the BES-PC schemes minimize the average delay while satisfying the same spectral efficiency as the SES and BES schemes, respectively. © 2012 IEEE.en
dc.description.sponsorshipThis work was made possible by NPRP grant No. NPRP 08-152-2-043 and NPRP grant No. NPRP 08-101-2-025 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.subjectAdaptive modulationen
dc.subjectand switched diversityen
dc.subjectperformance analysisen
dc.subjectpower controlen
dc.subjectspectrum sharingen
dc.titlePerformance analysis of joint multi-branch switched diversity and adaptive modulation schemes for spectrum sharing systemsen
dc.typeArticleen
dc.contributor.departmentElectrical Engineering Programen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentCommunication Theory Laben
dc.identifier.journalIEEE Transactions on Communicationsen
dc.contributor.institutionECE Department, Concordia University, Montreal, Canadaen
dc.contributor.institutionDepartment of ECE, Texas AandM University at Qatar, Doha, Qataren
kaust.authorAlouini, Mohamed-Slimen
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