[1] Ge Wendong, Ji Hong, Si Pengbo, Li Xi, et al. Optimal subcarrier allocation for cognitive radiowith multi-user OFDM and distributed antenna [J]. Journal of Southeast University (English Edition), 2010, 26 (4): 513-517. [doi:10.3969/j.issn.1003-7985.2010.04.002]

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Optimal subcarrier allocation for cognitive radiowith multi-user OFDM and distributed antenna()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

26

Issue:

2010 4

Page:

513-517

Research Field:

Information and Communication Engineering

Publishing date:

2010-12-30

Info

Title:

Optimal subcarrier allocation for cognitive radiowith multi-user OFDM and distributed antenna

Author(s):

Ge Wendong¹;  Ji Hong¹;  Si Pengbo²;  Li Xi¹

¹Key Laboratory of Universal Wireless Communication of Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
²College of Electronics Information and Control Engineering, Beijing University of Technology, Beijing 100022, China

Keywords:

cognitive radio;  subcarrier allocation;  multi-user OFDM;  distributed antenna;  branch and bound algorithm;  implicit enumeration algorithm;  pegging algorithm

PACS:

TN91

DOI:

10.3969/j.issn.1003-7985.2010.04.002

Abstract:

The subcarrier allocation problem in cognitive radio(CR)networks with multi-user orthogonal frequency-division multiplexing(OFDM)and distributed antenna is analyzed and modeled for the flat fading channel and the frequency selective channel, where the constraint on the secondary user(SU)to protect the primary user(PU)is that the total throughput of each PU must be above the given threshold instead of the “interference temperature”. According to the features of different types of channels, the optimal subcarrier allocation schemes are proposed to pursue efficiency(or maximal throughput), using the branch and bound algorithm and the 0-1 implicit enumeration algorithm. Furthermore, considering the tradeoff between efficiency and fairness, the optimal subcarrier allocation schemes with fairness are proposed in different fading channels, using the pegging algorithm. Extensive simulation results illustrate the significant performance improvement of the proposed subcarrier allocation schemes compared with the existing ones in different scenarios.

References:

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Memo

Memo:

Biographies: Ge Wendong(1982—), male, graduate; Ji Hong(corresponding author), female, doctor, professor, jihong@bupt.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.60832009), Beijing Municipal Natural Science Foundation(No.4102044), National Major Science & Technology Project(No.2009ZX03003-003-01).
Citation: Ge Wendong, Ji Hong, Si Pengbo, et al.Optimal subcarrier allocation for cognitive radio with multi-user OFDM and distributed antenna[J].Journal of Southeast University(English Edition), 2010, 26(4):513-517.

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