(An) efficient ICI self-cancellation method with frequency offset and phase noise in OFDM systems = OFDM 시스템에서 주파수 오차와 위상 잡음에 의한 ICI를 제거하기 위한 효율적인 자가상쇄 기법

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OFDM (Orthogonal Frequency Division Multiplexing) System is a promising transmission technique due to its spectral efficiency. But, a major disadvantage of the OFDM system is its sensitivity to frequency offset and phase noise that makes intercarrier interference (ICI), which degrades the system performance severely. The ICI self-cancellation method has a good performance with frequency offset or phase noise. But, in practical system, there are both frequency offset and phase noise. So conventional ICI self-cancellation have to be changed for frequency offset and phase noise cancellation. This thesis proposed the N/2 spacing data-conjugate method that works well in large frequency offset and phase noise (normalized frequency offset=0.2~0.4, phase noise standard deviation=about 10deg). Also, an efficiency ICI cancellation method using pilot was proposed. Condition rule checks whether the frequency offset and phase noise is large or not. This scheme works as the symmetric data-conjugate method in small errors, the N/2 spacing data-conjugate method in large errors. Simulation results confirm that performance of the proposed scheme considering the pilot is better than conventional schemes.
Advisors
Kim, Hyung-Myungresearcher김형명researcher
Description
한국과학기술원 : 전기및전자공학전공,
Publisher
한국과학기술원
Issue Date
2008
Identifier
297172/325007  / 020063202
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학전공, 2008.2, [ vi, 50 p. ]

Keywords

ICI self-cancellation; Frequency offset; Phase noise; ICI 자가상쇄; 주파수 오차; 위상 잡음; ICI self-cancellation; Frequency offset; Phase noise; ICI 자가상쇄; 주파수 오차; 위상 잡음

URI
http://hdl.handle.net/10203/38555
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=297172&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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