A Novel ICI Self-Cancellation Scheme for OFDM Systems

Shi, Qiang; Fang, Yong; Wang, Min

doi:10.1109/wicom.2009.5302543

Cited by 21 publications

(14 citation statements)

References 7 publications

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“…In base-band system, the transmitted signal in time domain can be expressed as (1) where denotes the th sample of the transmitted signal, denotes the modulated symbol in the th subcarrier, and is the total number of subcarriers. The received signal in time domain [7]- [10] is given by (2) where denotes the normalized frequency offset, and is given by . is the Doppler frequency shift and is the subcarrier symbol period.…”

Section: Summary Of Ici Problemmentioning

confidence: 99%

“…The received signal at the th subcarrier 1070-9908/$26.00 © 2010 IEEE can be expressed as (3) where represent the desired carrier signal components, represent the ICI components, is the FFT of , and are the complex coefficients for the ICI components in the received signal. The ICI components are the interfering signals transmitted on subcarriers other than the th subcarrier [10]. These coefficients are given by: (4) It is known that the total ICI power changes little with the total number of subcarriers [4], [9], [10].…”

Section: Summary Of Ici Problemmentioning

confidence: 99%

“…The ICI components are the interfering signals transmitted on subcarriers other than the th subcarrier [10]. These coefficients are given by: (4) It is known that the total ICI power changes little with the total number of subcarriers [4], [9], [10].…”

Section: Summary Of Ici Problemmentioning

confidence: 99%

“…In the symmetric data conversion (SDC) method [7], a data allocation is proposed to mitigate ICI. In the weighted conjugate transformation (WCT) method [10], is used to mitigate ICI. That is, the transmitted symbols are constrained such that .…”

Section: Summary Of Ici Problemmentioning

confidence: 99%

“…A lot of ICI mitigation methods have been extensively investigated to combat the ICI, including frequency-domain equalization [3], time-domain windowing [4], and the self-cancellation schemes [5]- [10], frequency offset estimation and tracking techniques [11] and so on. Among the methods, the ICI self-cancellation method is a simple way to suppress ICI that uses redundant modulation.…”

Section: Introductionmentioning

confidence: 99%

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ICI Mitigation for OFDM Using PEKF

Shi¹

2010

IEEE Signal Process. Lett.

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Orthogonal frequency division multiplexing (OFDM) is widely known as the promising broadband wireless communication technology due to the high spectral efficiency and robustness to the multi-path interference. However, the inter-carrier interference (ICI) caused by Doppler frequency offset is an important issue for OFDM in high mobility. In this paper, the method to mitigate ICI for OFDM system is investigated, and a novel ICI mitigation method using planar extended Kalman filter (PEKF) is proposed to reduce the ICI effects. Simulation results demonstrate that the proposed ICI mitigation method in this letter outperforms traditional ICI mitigation methods.

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Section: Summary Of Ici Problemmentioning

confidence: 99%

Section: Summary Of Ici Problemmentioning

confidence: 99%

Section: Summary Of Ici Problemmentioning

confidence: 99%

Section: Summary Of Ici Problemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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ICI Mitigation for OFDM Using PEKF

Shi¹

2010

IEEE Signal Process. Lett.

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A novel ICI self‐cancellation scheme for OFDM systems

Tseng

Huang

2011

Int J Communication

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SUMMARYWe propose a novel intercarrier interference (ICI) self-cancellation scheme for orthogonal frequency division multiplexing (OFDM) systems. The symmetric scheme is the best among all ICI self-cancellation scheme in the literature. Its coefficient pair is (1, −1), and the loading subcarriers are the k th and N −k −1 th subcarriers, where N is the number of subcarriers. We propose to modify the symmetric scheme and change the coefficient pair from (1, −1) to (1, − ) where is between 0 and 1. The proposed modified symmetric scheme has better carrier-to-interference-ratio (CIR) than all previous ICI self-cancellation schemes by at least 1.7 dB when the normalized frequency offset is 0.5.

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