Please use this identifier to cite or link to this item:
|Title:||Dynamic spectrum sharing in orthogonal frequency division multiple access - based cognitive radio||Authors:||Da, B.
|Issue Date:||26-Nov-2010||Citation:||Da, B., Ko, C.C. (2010-11-26). Dynamic spectrum sharing in orthogonal frequency division multiple access - based cognitive radio. IET Communications 4 (17) : 2125-2132. ScholarBank@NUS Repository. https://doi.org/10.1049/iet-com.2010.0090||Abstract:||In this study, a secondary network is underlaid in a conventional downlink orthogonal frequency division multiple access (OFDMA) system to formulate a new implementation of cognitive radio, where spectrum sharing is enabled to improve spectrum utilisation. This implementation is applicable to the scenario when the number of active users is larger than the number of subcarriers, which usually cannot be achieved in traditional OFDMA systems. To properly allocate radio resources, some solutions are proposed based on duality theory. The proposed solutions are partially distributed algorithms that can dynamically allocate resources to secondary users (SUs) with the co-operation of primary users (PUs) so that the capacity of secondary network can be maximised and the co-channel interference can be minimised. In addition, the effect of interference temperature limit on the capacity of secondary network is studied, which may serve as a leverage to balance the performance between the PUs and the secondary network. © 2010 The Institution of Engineering and Technology.||Source Title:||IET Communications||URI:||http://scholarbank.nus.edu.sg/handle/10635/55731||ISSN:||17518628||DOI:||10.1049/iet-com.2010.0090|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jun 11, 2019
WEB OF SCIENCETM
checked on Jun 4, 2019
checked on May 25, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.