DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ban, Tae Won | - |
dc.contributor.author | Choi, Wan | - |
dc.contributor.author | Jung, Bang Chul | - |
dc.contributor.author | Sung, Dan Keun | - |
dc.date.accessioned | 2011-03-11T07:02:09Z | - |
dc.date.available | 2011-03-11T07:02:09Z | - |
dc.date.issued | 2009-01 | - |
dc.identifier.citation | IEEE Transactions on Wireless Communications, Vol.8, No.1 | en |
dc.identifier.issn | 1536-1276 | - |
dc.identifier.uri | http://hdl.handle.net/10203/22597 | - |
dc.description.abstract | We investigate the effects of multi-user diversity in a spectrum sharing system where secondary users restrictively utilize a spectrum licensed to primary users only if interference perceived at primary users is regulated below a predetermined level. This interference regulation affects the characteristics of multiuser diversity gains previously known in non-spectrum sharing systems. Our numerical and analytical results show that the multiuser diversity gain in a spectrum sharing system increases differently according to conditions given by the transmit power of secondary users, P, and a predetermined interference temperature, Q – if P is sufficiently larger than Q, the multiuser diversity gain in terms of capacity scales like log2 (W (Ns)) similarly to a previously known scaling law in the non-spectrum sharing systems, where W(·) and Ns denote a Lambert W function and the number of secondary transmitters, respectively. However, the scaling law of multiuser diversity gain becomes log2(Ns) as P becomes sufficiently larger such that P QNs. | en |
dc.language.iso | en_US | en |
dc.publisher | IEEE | en |
dc.subject | Spectrum sharing | en |
dc.subject | cognitive radio | en |
dc.subject | multiuser diversity | en |
dc.title | Multi-User Diversity in a Spectrum Sharing System | en |
dc.type | Article | en |
dc.identifier.doi | 10.1109/T-WC.2009.080326 | - |
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