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| Phase Rotation Modulation Technique for Time-Varying OFDM Systems |
| Yu Fei; Yang Lu-xi |
| School of Information Science and Engineering, Southeast University, Nanjing 210096, China |
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Abstract Due to the time variation and frequency offset of mobile radio channels of the OFDM system, the orthogonality between sub-carriers will be destroyed. In this paper, a novel phase rotation technique is proposed which can suppress the Inter-Carrier Interference (ICI) efficiently. This new method can get the minimum of sub-carrier interference in frequency domain by rotating the phase properly on each sub-carrier. Simulation results show that this new scheme can suppress the ICI efficiently and achieve better system BER performance, while the frequency efficiency and transmitting power remain the same.
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Received: 25 June 2007
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2009, Vol. 31 
