DL Radio Transmission Technologies for WRAN Applications : Adaptive Sub-channel Allocation and Stationary Beamforming Algorithms for OFDMA CR System 


Vol. 31,  No. 3, pp. 291-303, Mar.  2006


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  Abstract

In this paper, we analyze functional requirements of the IEEE 802.22 WRAN, and propose a downlink 프레 임 structure satisfying the requirements. The proposed downlink 프레임 structure maximizes the transmission efficiency by adopting the cognative radio to assign the sub-channel by reflecting the channel environment of WRAN. We also calculate the signalling overhead for both downlink and uplink, and analyze the performances of time synchronizaiton, frequency synchronization and cell identification based on the 프리앰블 in downlink and suggest the channel estimation method through 프리앰블 or pilot. As a final result, the stationary beamforming (SBF) algorithm with dynamic channel allocation(DCA) is proposed. The proposed OFDMA downlink 프레임 structure with channel adaptive sub-channel allocation for cognitive radio applications is verified to meet the requirements of IEEE 802.22 WRAN, by computer simulations.

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  Cite this article

[IEEE Style]

J. Kim, S. Ko, K. Chang, "DL Radio Transmission Technologies for WRAN Applications : Adaptive Sub-channel Allocation and Stationary Beamforming Algorithms for OFDMA CR System," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 3, pp. 291-303, 2006. DOI: .

[ACM Style]

JungJu Kim, SangJun Ko, and KyungHi Chang. 2006. DL Radio Transmission Technologies for WRAN Applications : Adaptive Sub-channel Allocation and Stationary Beamforming Algorithms for OFDMA CR System. The Journal of Korean Institute of Communications and Information Sciences, 31, 3, (2006), 291-303. DOI: .

[KICS Style]

JungJu Kim, SangJun Ko, KyungHi Chang, "DL Radio Transmission Technologies for WRAN Applications : Adaptive Sub-channel Allocation and Stationary Beamforming Algorithms for OFDMA CR System," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 3, pp. 291-303, 3. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880