Title page for etd-0808115-104105


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URN etd-0808115-104105
Author Hua-Cheng Ye
Author's Email Address titan10597@hotmail.com
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Department Communications Engineering
Year 2014
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Performance Analysis of Novel MC-CDMA Uplink with Multiple Carrier Frequency Offsets
Date of Defense 2015-07-28
Page Count 62
Keyword
  • multi carrier-code division multiple access (MC-CDMA)
  • carrier frequency offset (CFO)
  • successive interference cancellation (SIC)
  • multiple access interference (MAI)
  • Gaussian integer perfect sequence (GIPS)
  • Abstract Multi-carrier code division multiple access (MC-CDMA) systems experience serious multiple access interference (MAI) in uplink transmission because the orthogonality among codes is destroyed by the frequency-selective fading channels. A novel MC-CDMA system is proposed to avoid MAI by adopting the frequency-domain equivalents of the perfect Gaussian integer sequences as the spreading codes. However, multiple carrier-frequency offsets also induce MAI, which continues to exist in the novel MC-CDMA system. This thesis considers the effect of multiple carrier-frequency offsets (CFOs). We derive the signals-to-interference-plus-noise ratio of the novel MC-CDMA systems. In addition, a successive interference cancellation (SIC) method is proposed to mitigate MAI caused by multiple CFOs. Simulation experiments demonstrate that the improvements of the proposed SIC method for quadrature phase-shift keying after performing four iterations is 20 dB at a bit-error-rate of 10-3 . Notably, the BER performance of the proposed SIC method after performing four iterations is similar to that of the novel MC-CDMA systems without any carrier-frequency offset.
    Advisory Committee
  • Yu T. Su - chair
  • Guu-Chang Yang - co-chair
  • Chin-Liang Wang - co-chair
  • Sen-Hung Wang - co-chair
  • Char-Dir Chung - co-chair
  • Chih-Peng Li - advisor
  • Files
  • etd-0808115-104105.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2015-09-08

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