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- W1981302475 abstract "We consider a cognitive channel where one secondary transmitter opportunistically broadcasts to n secondary nodes subject to peak interference power constraints on the primary receivers. We find asymptotic bounds for the secondary throughput, which imply that the throughput scales as Θ (log log n) for any finite interference constraint, no matter how small. Furthermore, a fundamental tradeoff between the secondary throughput and the interference on the primary is obtained, showing that the interference on the primary can be forced asymptotically to zero while maintaining a nontrivial secondary throughput. Specifically, for an arbitrary exponent 0 <; q <; 1, the interference on the primary can be made as small as (log n) <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-q</sup> , while the secondary throughput scales as (1-q) log log n+O(1). Finally, if the number of primary receivers increases as Θ(n <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>β</sup> ), the secondary system attains only a constant throughput asymptotically, for any β >; 0." @default.
- W1981302475 created "2016-06-24" @default.
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- W1981302475 date "2010-12-01" @default.
- W1981302475 modified "2023-09-30" @default.
- W1981302475 title "Opportunistic cognitive radio broadcast channel: Asymptotic performance" @default.
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- W1981302475 doi "https://doi.org/10.1109/glocomw.2010.5700119" @default.
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