| URN |
etd-0808115-104105 |
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| Author |
Hua-Cheng Ye |
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| Author's Email Address |
titan10597@hotmail.com |
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| Statistics |
This thesis had been viewed 5569 times. Download 10 times. |
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| Department |
Communications Engineering |
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| Year |
2014 |
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| Semester |
2 |
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| Degree |
Master |
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| Type of Document |
|
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| Language |
zh-TW.Big5 Chinese |
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| Title |
Performance Analysis of Novel MC-CDMA Uplink with Multiple Carrier Frequency Offsets |
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| Date of Defense |
2015-07-28 |
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| Page Count |
62 |
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| 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)
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| 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. |
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| 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
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| Files |
Indicate in-campus at 5 year and off-campus access at 5 year. |
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| Date of Submission |
2015-09-08 |
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