Volume 4 Number 1 (Feb. 2014)
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IJEEEE 2014 Vol.4(1): 77-81 ISSN: 2010-3654
DOI: 10.7763/IJEEEE.2014.V4.306

A Power Allocation Algorithm for Enhancing the Security of OFDM System

Hui Zhu, Kaizhi Huang, Wenyue Luo, and Ying Hong
Abstract— In order to protect OFDM wireless communication systems, information encryption protocol on high-layer is always used. However, it has very limited space to improve its safety performance. For this problem, we present a carrier power allocation algorithm to improve the secrecy rate. Firstly, the difference of each OFDM carrier channel fading coefficient is considered. Secondly, K-T condition is used to optimize the carrier power allocation to maximize secrecy rate with the limited total power, thereby enhancing the transmission security performance of OFDM system. Simulation results show that compared to the average allocation the secrecy rate of optimal allocation can be enhanced to 6.109bit/s/Hz at most with 128 carriers.

Index Terms— Physical layer security, OFDM system, Power allocation, secrecy rate.

Hui Zhu is with the Beijing University of Post&Telecommunication, Beijing, China (e-mail: huangkaizhi@tsinghua.org.cn).

Cite: Hui Zhu, Kaizhi Huang, Wenyue Luo, and Ying Hong, " A Power Allocation Algorithm for Enhancing the Security of OFDM System," International Journal of e-Education, e-Business, e-Management and e-Learning vol. 4, no. 1, pp. 77-81, 2014.

General Information

ISSN: 2010-3654 (Online)
Frequency: Quarterly (Since 2015)
Editor-in-Chief: Prof. Kuan-Chou Chen
Executive Editor: Ms. Nancy Lau
Abstracting/ Indexing: EBSCO, Google Scholar, Electronic Journals Library, QUALIS, ProQuest, EI (INSPEC, IET)
E-mail: ijeeee@iap.org
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