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- W2039128968 abstract "Mobile operators need to migrate from 2G to 3G networks in a cost-effective manner. Cognitive radio systems are currently being investigated as a promising solution to achieve spectrum efficiency by allowing coexistence of unlicensed (secondary) networks and licensed (primary) networks. However, conventional mechanisms to operate these systems incur additional complexity and fail to maximize network performance. In this paper, we propose a pilot sensing and frequency selection method with low complexity for OFDMA-based cognitive radio systems. Subject to the interference constraints imposed by the primary network, capacity maximization problems involving both up-link and down-link connections are considered for overall network performance improvement. The throughput and outage probability of the proposed method are evaluated by simulations. Our proposed method shows outstanding performance if the channel varies frequently in the primary network and the frequency reuse factor of the primary network is high." @default.
- W2039128968 created "2016-06-24" @default.
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- W2039128968 date "2011-01-01" @default.
- W2039128968 modified "2023-09-25" @default.
- W2039128968 title "Frequency Sharing Mechanism Using Pilot Sensing in OFDMA-Based Cognitive Radio Networks" @default.
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- W2039128968 doi "https://doi.org/10.1587/transcom.e94.b.986" @default.
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