Inter Carrier Interference Cancellation in OFDM Systems

Amasa, Ravitej (2009) Inter Carrier Interference Cancellation in OFDM Systems. MTech thesis.



Orthogonal Frequency Division Multiplexing (OFDM) is an emerging multi-carrier modulation scheme, which has been adopted for several wireless standards such as IEEE 802.11a and HiperLAN2. A well-known problem of OFDM is its sensitivity to frequency offset between the transmitted and received carrier frequencies. This frequency offset introduces inter-carrier interference (ICI) in the OFDM symbol. This project investigates two methods for combating the effects of ICI: ICI self-cancellation (SC), and extended Kalman filter (EKF) method. These two methods are compared in terms of bit error rate performance, bandwidth efficiency, and computational complexity. Through simulations, it is shown that the two techniques are effective in mitigating the effects of ICI. For high values of the frequency offset and for higher order modulation schemes, EKF method performs better than the SC method.

Item Type:Thesis (MTech)
Uncontrolled Keywords:OFDM, ICI self-cancellation,extended Kalman filter
Subjects:Engineering and Technology > Electronics and Communication Engineering > Wireless Communications
Engineering and Technology > Electronics and Communication Engineering > Mobile Networks
Divisions: Engineering and Technology > Department of Electronics and Communication Engineering
ID Code:1388
Deposited By:Ravitej Amasa
Deposited On:29 May 2009 08:51
Last Modified:29 May 2009 08:51
Supervisor(s):Singh, P

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