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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Donglin Hu Shiwen Mao |
| Copyright Year | 2011 |
| Description | Author affiliation: Department of Electrical and Computer Engineering, Auburn University, AL, USA (Donglin Hu; Shiwen Mao) |
| Abstract | Cognitive radio (CR) is a paradigm of sharing spectrum among licensed (or, primary) and unlicensed (or, CR) users. In CR networks, interference mitigation is crucial not only for primary user protection, but also for the quality of service of CR users. We consider the problem of interference mitigation via channel assignment and power allocation for CR users. We develop a cross-layer optimization framework for minimizing both co-channel and adjacent channel interference; the latter has been shown to have considerable impact in practical systems. Spectrum sensing, opportunistic spectrum access, channel assignment, and power allocation are considered in the problem formulation. We propose a reformulation-linearization technique (RLT) based centralized algorithm that computes near-optimal solutions in polynomial time, and a distributed greedy algorithm that uses local information. Both algorithms are evaluated with simulations and are shown quite effective for mitigating both types of interference and achieving high CR network capacity. |
| Starting Page | 13 |
| Ending Page | 18 |
| File Size | 524965 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781467300797 |
| ISSN | 21557578 |
| e-ISBN | 9781467300810 |
| DOI | 10.1109/MILCOM.2011.6127445 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-11-07 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Throughput Manganese Sensors Resource management Receivers Interference Transmitters |
| Content Type | Text |
| Resource Type | Article |
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