@inproceedings{69208214df4846ef99cda720ab27488a,
title = "Spectrum shaping challenges in dynamic spectrum access networks with transmission hyperspace",
abstract = "Our goal in this paper is to discuss several issues and challenges involved with dynamic spectrum access in cognitive radio networks (CRNs). In this context, we introduce three optimization problems for spectrum shaping in cognitive radio networks (CRNs) using orthogonal frequency division multiplexing (OFDM). These optimization problems utilize the concept of transmission hyperspace (TH). The first problem involves maximization of sum-rate of the network under primary and secondary quality-of-service (QoS) constraints utilizing frequency and space dimensions of the TH. The second problem relaxes the omnidirectional assumption and incorporates antenna directionality in the first problem. As for the third problem, time dimension of the TH is added to the first two problems and the resulting problem is formulated as a time scheduling problem. We show that all these problems are NP-hard which requires the development of efficient heuristic algorithms.",
author = "Onur Ozdemir and Engin Masazade and Mohan, {Chilukuri K.} and Varshney, {Pramod K.} and Irina Kasperovich and Richard Loe and Drozd, {Andrew L.} and Stephen Reichhart",
note = "Publisher Copyright: {\textcopyright} 2012 IEEE.; International Waveform Diversity and Design Conference, WDD 2012 ; Conference date: 22-01-2015 Through 27-01-2015",
year = "2015",
month = oct,
day = "28",
doi = "10.1109/WDD.2012.7311266",
language = "English (US)",
series = "2012 International Waveform Diversity and Design Conference, WDD 2012",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "218--221",
booktitle = "2012 International Waveform Diversity and Design Conference, WDD 2012",
}