A Novel ICI Triple Cancellation Scheme in Fast Time-varying Environment for OFDM Systems

2018 International Joint Conference on Materials Science and Mechanical Engineering

Ye, Jiongyao^1 ; Wang, Hengxiao^1 ; Yuan, Weina^1 ; Wang, Nan^1 ; Xu, Rui^1

School of Information Science and Engineering, East China University of Science and Technology, Shanghai

200237, China^1

关键词: ICI cancellation;    Intercarrier interference;    Orthogonal frequency division multiplexing systems;    Orthogonality;    Self cancellation;    Self-cancellation scheme;    Time varying channel;    Time-varying environments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/383/1/012055/pdf
DOI  :  10.1088/1757-899X/383/1/012055

来源: IOP

【 摘 要 】

In fast time-varying environment, orthogonal frequency division multiplexing (OFDM) systems lose the orthogonality between subcarriers due to the Doppler effect, resulting in inter-carrier interference (ICI), which greatly affects the performance of the communication system. Based on the analysis of the principle of ICI generation in time-varying environment, an ICI triple cancellation scheme is proposed to reduce the ICI of the OFDM systems in fast time-varying environment. In the scheme, the ICI self-cancellation modulation is performed at the transmitter of the OFDM system. Then, the time-varying channel is modeled as a linearly time-varying (LTV) model for ICI dual cancellation. Finally, the ICI self-cancellation demodulation is executed at the receiver of the system. Simulation experiment results show that the proposed ICI triple cancellation scheme can achieve a better effect of ICI cancellation than ICI self-cancellation scheme and ICI dual cancellation scheme, improving the performance of the communication system.