Performance analysis of greedy subchannel allocation schemes for adaptive OFDMA systems
| dc.contributor.author | Lv, Nan | |
| dc.contributor.supervisor | Yang, Hong-Chuan | |
| dc.date.accessioned | 2010-08-23T17:39:28Z | |
| dc.date.available | 2010-08-23T17:39:28Z | |
| dc.date.copyright | 2010 | en |
| dc.date.issued | 2010-08-23T17:39:28Z | |
| dc.degree.department | Department of Electrical and Computer Engineering | |
| dc.degree.level | Master of Applied Science M.A.Sc. | en |
| dc.description.abstract | Subchannel allocation schemes for OFDMA (orthogonal frequency division multiple access) systems with adaptive transmission are investigated. The analysis involves two scenarios: single-hop transmission and dual-hop relaying transmission. The overall objective is to utilize minimum system resource (in terms of subchannel) while satisfying scheduled users' data rate requirements under a certain error rate performance restriction. The ordered subchannel selection with adaptive modulation scheme is applied to both cases. In single-hop case, a low-complexity greedy subchannel allocation algorithm with two options is proposed, depending on whether a common modulation mode is applied on all selected subchannels or not. The resulting two options are termed as GS-FA (greedy selection with full adaptivity) and GS-LA (greedy selection with limited adaptivity), respectively. In dual-hop relaying case, two relaying schemes are considered: Amplified-and-Forward (AF) and Decode-and-Forward (DF). Based on this, four different combinations of relaying schemes and ordered subchannel selection with adaptive modulation scheme are investigated: DF with full adaptivity (DF-FA), AF with full adaptivity (AF-FA), AF with limited adaptivity (AF-LA), and AF with limited adaptivity and subchannel mapping (AF-LA with SCM). For both single-hop and dual-hop relaying case, performances of different proposed schemes are evaluated through mathematical analysis and compared with selected numerical results. | en |
| dc.identifier.uri | http://hdl.handle.net/1828/2953 | |
| dc.language | English | eng |
| dc.language.iso | en | en |
| dc.rights | Available to the World Wide Web | en |
| dc.subject | performance analysis | en |
| dc.subject | subchannel allocation | en |
| dc.subject | adaptive OFDMA | en |
| dc.subject.lcsh | UVic Subject Index::Sciences and Engineering::Engineering::Electrical engineering | en |
| dc.title | Performance analysis of greedy subchannel allocation schemes for adaptive OFDMA systems | en |
| dc.type | Thesis | en |