Low-Complex ICI Cancellation for Improving Doppler Performance in OFDM Systems

Faulkner, M.; Wilhelmsson, Leif; Svensson, Jim

doi:10.1109/vtcf.2006.181

Cited by 21 publications

(11 citation statements)

References 7 publications

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“…Compared with other ICI suppression methods using segment combining [20]- [23], Method 1 achieves a better performance with the same computation complexity. The performance can be improved by Method 3 if the delay spread is large.…”

Section: Discussionmentioning

confidence: 99%

“…In this situation, the work in [20] suggested to set the combining weights uniformly, but this is apparently a suboptimum solution in the sense of ICI minimization. Afterward, in [21]- [23], heuristic algorithms were proposed to choose better combining weights to improve the performance of [20]. In a parallel work [24], an engineering intuition that Frank function window may be the optimum combining window was shown.…”

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confidence: 99%

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Low-Complexity ICI Suppression Methods Utilizing Cyclic Prefix for OFDM Systems in High-Mobility Fading Channels

Liu

Huang

2014

IEEE Trans. Veh. Technol.

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Abstract-This paper focuses on a simple intercarrier interference (ICI) suppression scheme that linearly combines the intersymbol interference (ISI)-free part of a cyclic prefix (CP) and its corresponding part in an orthogonal frequency-division multiplexing (OFDM) signal to soothe the ICI effect caused by a timevarying channel. In contrast with existing heuristic combining weights in the literature for ICI suppression, we derived three sets of optimum combining weights in different aspects. Through simulations, we show that the proposed combining weights outperform other existing heuristic combining weights. In addition, a simplified implementation is introduced to reduce the computational complexity of combining. Furthermore, the proposed methods can be incorporated with other ICI mitigation methods to further improve the system performance.Index Terms-Cyclic prefix (CP) combining, cyclic prefix (CP) recycling, high mobility, intercarrier interference (ICI) suppression, low-complexity ICI mitigation method, orthogonal frequency-division multiplexing (OFDM), sliding window.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Low-Complexity ICI Suppression Methods Utilizing Cyclic Prefix for OFDM Systems in High-Mobility Fading Channels

Liu

Huang

2014

IEEE Trans. Veh. Technol.

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“…Here the channel for the Kth sub carrier during the reception of one OFDM symbol is assumed to vary in a linear fashion [5].…”

Section: Analytical Modelmentioning

confidence: 99%

“…Where H K is the channel change during the symbol and H K is the average channel experienced during the OFDM symbol.Consequently, the ICI on sub carrier K caused by the symbol sent on sub carrier K+L is given by [5] ,…”

Section: Analytical Modelmentioning

confidence: 99%

Adaptive OFDM for High Mobility Computer Application

Kavitha¹,

Babu²

2010

IJCEE

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“…In [5] it was shown that if the channel is assumed to vary in a linear fashion during the OFDM symbol, then the ICI on sub-carrier K caused by the symbol sent on sub-carrier K +L is given by…”

Section: B Ici Due To Doppler -Rectangular Windowingmentioning

confidence: 99%

Some Results on Implementing Low-Complex ICI Cancellation for DVB-H

Wilhelmsson

Svensson

Nevalainen

et al. 2007

2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring

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A combination of receiver windowing and intercarrier interference (ICI) canceling is proposed for improving the Doppler frequency performance of a DVB-H receiver. The windowing reduces the ICI, and enables ICI cancellation of low complexity to give substantial improvements. Bounds for the possible improvements of ICI cancellation are presented and compared to results from both simulations and measurements on a DVB-H prototype. The found improvements obtained from windowing agree well with that predicted by theory, whereas the gain from ICI cancellation is considerably smaller. This is primarily due to non-ideal channel estimation, which also is discussed. Although the measured performance for ICI cancellation is far from that theoretically possible, the gain in what Doppler frequency can be handled is more than 40%.

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Low-Complex ICI Cancellation for Improving Doppler Performance in OFDM Systems

Cited by 21 publications

References 7 publications

Low-Complexity ICI Suppression Methods Utilizing Cyclic Prefix for OFDM Systems in High-Mobility Fading Channels

Low-Complexity ICI Suppression Methods Utilizing Cyclic Prefix for OFDM Systems in High-Mobility Fading Channels

Adaptive OFDM for High Mobility Computer Application

Some Results on Implementing Low-Complex ICI Cancellation for DVB-H

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