Construction and Analysis of Asynchronous Channel-Hopping Sequences for Cognitive Radio Networks
| Autor: | Wei-Chih Cheng, 程韋智 |
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| Rok vydání: | 2016 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 104 Besides designing channel-hopping (CH) sequences, finding good methods of communication rendezvous is important for improving spectral efficiency and alleviating traffic load of cognitive radio (CR) networks. In this thesis, new asynchronous-symmetric CH sequences are constructed and their (channel-overlap, even-channel-use, and pairwise shift-invariance) properties are investigated. Their operations in three transmission scenarios involving different collision-avoidance mechanisms are also analyzed and compared in terms of maximum time-to-rendezvous rate, rendezvous-success (RS) rate, and RS variance. Our study shows that the new sequences have shorter period, larger cardinality, and smaller RS variations that other CH sequences, thus supporting greater number of secondary users and more frequent, uniform rendezvous in CR networks. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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