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- W2339970100 abstract "STUDIES ON EFFICIENT SPECTRUM SHARING IN COEXISTING WIRELESS NETWORKS Guanying Ru June 13, 2014 Wireless communication is facing serious challenges worldwide: the severe spectrum shortage along with the explosive increase of the wireless communication demands. Moreover, different communication networks may coexist in the same geographical area. By allowing multiple communication networks cooperatively or opportunistically sharing the same frequency will potentially enhance the spectrum efficiency. This dissertation aims to investigate important spectrum sharing schemes for coexisting networks. For coexisting networks operating in interweave cognitive radio mode, most existing works focus on the secondary network’s spectrum sensing and accessing schemes. However, the primary network can be selfish and tends to use up all the frequency resource. In this dissertation, a novel optimization scheme is proposed to let primary network maximally release unnecessary frequency resource for secondary networks. The optimization problems are formulated for both uplink and downlink orthogonal frequency-division multiple access (OFDMA)-based primary networks, and near optimal algorithms are proposed as well. For coexisting networks in the underlay cognitive radio mode, this work focuses on the resource allocation in distributed secondary networks as long as the primary network’s rate constraint can be met. Global optimal multicarrier discrete distritbuted" @default.
- W2339970100 created "2016-06-24" @default.
- W2339970100 creator A5009577441 @default.
- W2339970100 date "2016-02-22" @default.
- W2339970100 modified "2023-09-26" @default.
- W2339970100 title "Studies on efficient spectrum sharing in coexisting wireless networks." @default.
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- W2339970100 doi "https://doi.org/10.18297/etd/2270" @default.
- W2339970100 hasPublicationYear "2016" @default.
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