Two linear intercarrier interference cancellation techniques in ofdm systems over multipath channels

Wang Yi; Zhang Zhongpei; Zhao Ming; Zhou Shidong; Xu Xibin

Volume 25 Issue 4

Apr. 2003

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Article Navigation > Journal of Electronics & Information Technology > 2003 > 25(4): 433-438

Wang Yi, Zhang Zhongpei, Zhao Ming, Zhou Shidong, Xu Xibin. Two linear intercarrier interference cancellation techniques in ofdm systems over multipath channels[J]. Journal of Electronics & Information Technology, 2003, 25(4): 433-438.

Citation:

Wang Yi, Zhang Zhongpei, Zhao Ming, Zhou Shidong, Xu Xibin. Two linear intercarrier interference cancellation techniques in ofdm systems over multipath channels[J]. Journal of Electronics & Information Technology, 2003, 25(4): 433-438.

Citation:

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Two linear intercarrier interference cancellation techniques in ofdm systems over multipath channels

Received Date: 2001-12-11
Rev Recd Date: 2002-05-20
Publish Date: 2003-04-19

Abstract

Abstract

InterCarrier Interference (ICI) is an important, factor degrading the performance of Orthogonal Frequency Division Multiplexing (OFDM) systems. Two linear ICI cancellation techniques, Frequency RAKE (F-RAKE) and frequency equalization (F-FIR), with different length of delay-line, L, are studied in this paper. Assuming that the channel information is known in the receiver and MMSE criterion is adopted for F-FIR, results show that F-RAKE has about 2~5dB Carrier-Interference-Ratio (CIR) achievement than standard receiver in case of L=3. Meanwhile, F-FIR has about 2~7 dB CIR achievement. And the CIR performance gains of the two schemes decrease with increment of L. Also, the computational complexity of F-FIR is L times than that of F-RAKE. Thus, the tradeoff between complexity and performance in the engineering can be reached by selecting the length of delay-line and receiver scheme.

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References(1)

References

Y. Li, L. J. Cimini, Jr., Bounds on the interchannel interference of OFDM in time-varying impairments, IEEE Trans. on Commun., 2001, 49(3), 401-404.[2]J. Armstrong, Analysis of new and existing methods of reducing intercarrier interference due to carrier frequency offset in OFDM, IEEE Trans. on Commun., 1999, 47(3), 365-369.[3]C. Muschalik, Improving an OFDM reception using an adaptive Nyquist windowing, IEEE Trans.on Consumer Electronics, 1996, 42(3), 259-269.[4]Y. Zhao, S. G. Haggman, Intercarrier interference self-cancellation scheme for OFDM mobile communication systems, IEEE Trans. on Commun. 2001, 49(7), 1185-1191.[5]Y. Zhao, S. G. Haggman, Sensitivity to Doppler shift and carrier frequency error in OFDM systems - The consequences and solutions, in Proc. IEEE Vehicular Technology Conference,Atlanta, USA. 1996, 1564-1568.[6]S. Haykin, Adatpive Filter Theory, 3rd edition, USA, Prentice Hall, 1996, chapter 8.

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