Title page for etd-0806108-190124


[Back to Results | New Search]

URN etd-0806108-190124
Author Hsin-Che Ho
Author's Email Address No Public.
Statistics This thesis had been viewed 5567 times. Download 2 times.
Department Communications Engineering
Year 2007
Semester 2
Degree Master
Type of Document
Language English
Title Pilot Design in Uplink OFDMA Systems
Date of Defense 2008-07-29
Page Count 55
Keyword
  • Multi-user Interference
  • Orthogonal Frequency Division Multiple Access
  • Carrier Frequency Offset
  • Abstract In this thesis, One of the difficulties in the orthogonal frequency division multiple access (OFDMA) systems is the multi-user interference (MUI) induced by the carrier frequency offset (CFO). In sub-band OFDMA systems, each user occupies a consecutive and non-overlapping frequency sub-band. The pilots are usually placed at the edges of a sub-band for frequency synchronization and channel estimation. However, the both frequency synchronization and channel estimation performance are influenced seriously by the multi-user interference (MUI) induced by CFO of other users. The MUI can be reduced by inserting the guard sub-carrier between adjacent users. In this paper, a novel pilot architecture is investigated, which has the same bandwidth efficiency as the conventional guard sub-carrier insertion scheme. In addition, the proposed pilot architecture provides better carrier frequency synchronization and channel estimation performance than conventional pilot assignment. Moreover, this new pilot architecture also has MUI reduction utility.
    Advisory Committee
  • Jhy-Horng Wen - chair
  • Shyue-Win Wei - co-chair
  • Chih-Peng Li - advisor
  • Tsang-Yi Wang - advisor
  • Files
  • etd-0806108-190124.pdf
  • indicate in-campus access in a year and off_campus not accessible
    Date of Submission 2008-08-06

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys