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Extended Quasi Orthogonal Functions for 3G CDMA Systems  

Lee Kwang-Jae (Department of Inform. & Telecomm. Engineering, Hanlyo University)
Moon Myung-Ryong (Department of Digital & Electrical Information, Jeonju Technical college)
Hou Jia (Institute of Information & Communication)
Lee Moon-Ho (Institute of Information & Communication)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.16, no.7, 2005 , pp. 697-708 More about this Journal
Abstract
The forward link of the 3G CDMA system may become limited under the increasing of the number of users. The conventional channelization code, Walsh code, has not enough sizes f3r much possible users, therefore, the quasi orthogonal function(QOF), which process optimal crosscorrelation with Walsh code, is considered. In this paper, we investigate quasi orthogonal function on Jacket matrices, which can lead lower correlations values and better performance in 3G CDMA system. Moreover, to simplify the detector and improve the BER performance, a novel detection for QOF CDMA system is proposed. Finally, the simple recursive generation of the bent sequences for QOF mask function is discussed.
Keywords
CDMA; QOF; Bent Sequence; Hadamard;
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