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- W2145197862 abstract "Traditionally, frequency spectrum is licensed to users by government agencies in a fixed manner where licensee has exclusive right to access the allocated band. This policy has been de jure practice to protect systems from mutual interference for many years. However, with increasing demand for the spectrum and scarcity of vacant bands, a spectrum policy reform seems inevitable. Meanwhile, recent measurements suggest the possibility of sharing spectrum among different parties subject to interference-protection constraints. In this paper we study spectrum-sharing between a primary licensee and a group of secondary users. In order to enable access to unused licensed spectrum, a secondary user has to monitor licensed bands and opportunistically transmit whenever no primary signal is detected. However, detection is compromised when a user experiences shadowing or fading effects. In such cases, user cannot distinguish between an unused band and a deep fade. Collaborative spectrum sensing is proposed and studied in this paper as a means to combat such effects. Our analysis and simulation results suggest that collaboration may improve sensing performance significantly" @default.
- W2145197862 created "2016-06-24" @default.
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- W2145197862 date "2005-12-10" @default.
- W2145197862 modified "2023-10-13" @default.
- W2145197862 title "Collaborative spectrum sensing for opportunistic access in fading environments" @default.
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- W2145197862 doi "https://doi.org/10.1109/dyspan.2005.1542627" @default.
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