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학술대회 Design and Verification of IEEE 802.22 WRAN Physical Layer
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황성현, 엄중선, 송명선, 김창주, 박형래, 김윤희
International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom) 2008, pp.1-6
08MR1100, 스펙트럼 사용효율 개선을 위한 Cognitive radio 기술 개발, 송명선
This paper describes the design and verification of IEEE802.22 WRAN physical layer. The WRAN physical layer is fundamentally based on the IEEE 802.16e system, but the OFDMA parameters including preamble structure and pilot pattern are newly designed by considering the WRAN channel environments. In this paper, we present the simulation models and results by using appropriate synchronization and channel estimation algorithms. From the results of those simulations, we can obtain 90% preamble detection probability at SNR more than -5 dB, and we can synchronize the CPE to the BS within 2% of sub-carrier spacing at SNR more than about 1 dB. Moreover, by using the LMMSE algorithm to estimate the channel, we can reduce the performance degradation of 0.2??0.5 dB compared to ideal channel estimation. In conclusion, we have found that the proposed receiver meets the Functional Requirement Document (FRD) for WRAN physical layer.
Channel estimation, Cognitive radio, IEEE802.22, OFDMA, Synchronization, WRAN
KSP 제안 키워드
Channel estimation(CE), Detection probability, Functional Requirements, IEEE 802.16e(Mobile wimax), IEEE 802.22 WRAN, LMMSE algorithm, Physical Layer, Preamble detection, Requirement document, Simulation Model, Sub-carrier