Multiple Frequency Offsets Compensation in OFDMA Femtocells

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Author(s): Shaodan Ma (The University of Hong Kong, China), Lanlan He (The University of Hong Kong, China), Yik-Chung Wu (The University of Hong Kong, China)and Tung-Sang Ng (The University of Hong Kong, China)
Copyright: 2012
Pages: 20
Source title: Femtocell Communications and Technologies: Business Opportunities and Deployment Challenges
Source Author(s)/Editor(s): Rashid A. Saeed (UIA, Malaysia), Bharat S. Chaudhari (International Institute of Information Technology, India)and Rania A. Mokhtar (Sudan University of Science and Technology, Sudan)
DOI: 10.4018/978-1-4666-0092-8.ch007

Keywords: Information Science Reference / Media & Communications / Networking and Telecommunications / Wireless Systems

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Abstract

With the properties of interference avoidance and the robustness against multipath channels, Orthogonal Frequency Division Multiple Access (OFDMA) has been considered a promising solution to the interference control problem in femtocells. As a multi-carrier transmission technique, OFDMA, however, is highly vulnerable to the Carrier Frequency Offset (CFO). This chapter discusses the challenges of multiple frequency offsets compensation in OFDMA femtocells. A number of multiple frequency offsets compensation algorithms are reviewed and their complexities are discussed in detail. A new approach that exploits the redundancy offered by cyclic prefix is then introduced to enhance the compensation performance. Finally, numerical results are presented to illustrate the performance of different compensation algorithms.

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Multiple Frequency Offsets Compensation in OFDMA Femtocells

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