Intercarrier Interference Cancellation Using General Phase Rotated Conjugate Transmission for OFDM Systems

Wang, Chin-Liang; Huang, Yu-Chih

doi:10.1109/wcnc.2008.120

Cited by 21 publications

(39 citation statements)

References 17 publications

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“…For example, the phase rotation adopted at the Tx is derived as φ = −πε 1 − 1 N , whereε is the feedback estimated frequency offset from the Rx in [25]. The PRA method used in the PRCC scheme aims to make the phases of the ICI coefficients for the both paths have an opposite polarity, so that they can cancel out each other when the combination of the both paths is implemented.…”

Section: A Two Currently Important Ici Cancellation Methodsmentioning

confidence: 99%

“…More recently, to further improve the performance of the CC scheme, the authors in [25] added an artificial phase rotation into the CC scheme to propose a new two-path cancellation method, namely phase rotated conjugate cancellation (PRCC) scheme. The phase rotation aided (PRA) method can be used for any ICI self-cancellation and two-path cancellation schemes to further improve their ICI mitigation performance.…”

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confidence: 99%

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Wideband Channel Modeling and Intercarrier Interference Cancellation for Vehicle-to-Vehicle Communication Systems

Cheng

Yao

Wen

et al. 2013

IEEE J. Select. Areas Commun.

216

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In this paper, we propose a new regular-shaped geometry-based stochastic model (RS-GBSM) for non-isotropic scattering wideband multiple-input multiple-output vehicle-tovehicle (V2V) Ricean fading channels. By correcting the unrealistic assumption widely used in current RS-GBSMs, the proposed model can more practically study the impact of the vehicular traffic density on channel statistics for different time delays. From the proposed model, we derive the Doppler power spectral density (PSD) and find that highly dynamic Doppler spectrum appears for V2V channels. Excellent agreement is achieved between the derived Doppler PSD and measured data, demonstrating the utility of the proposed model. To combat the intercarrier interference (ICI) caused by highly dynamic Doppler spectrum in real orthogonal frequency division multiplexing based V2V systems, this paper proposes a new type of ICI cancellation scheme, named as precoding based cancellation (PBC) scheme. The proposed scheme can be easily implemented into real V2V systems with the same ICI mitigation performance as the current best ICI cancellation scheme that has high complexity. To further improve the performance of the proposed PBC scheme, a new phase rotation aided (PRA) method, namely constant PRA (CPRA) method, is proposed. Compared with the existing PRA method, the CPRA method has better performance and much less implementation complexity. Therefore, the proposed PBC scheme with the CPRA method is the best ICI cancellation scheme for real V2V systems.Index Terms-Vehicle-to-vehicle wideband channels, geometrybased stochastic model (GBSM), orthogonal frequency division multiplexing (OFDM), intercarrier interference (ICI) cancellation, phase rotation aided method.

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Section: A Two Currently Important Ici Cancellation Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Wideband Channel Modeling and Intercarrier Interference Cancellation for Vehicle-to-Vehicle Communication Systems

Cheng

Yao

Wen

et al. 2013

IEEE J. Select. Areas Commun.

216

View full text Add to dashboard Cite

show abstract

“…On the other hand, a time-varying frequency offset situation under mobile environments and the requirement of feeding back frequency offset information for using the PRCC scheme [10] were pointed out in the adaptive receiver design [12], where different frequency offsets on two adjacent paths of the time-division multiplexing scheme could degrade the performance. Hence, two phase rotations and the corresponding adaptive update process were developed at the receiver accordingly.…”

Section: A the Receiver Structurementioning

confidence: 99%

“…In particular, a two-path transmission scheme called conjugate cancellation (CC) [9] can provide remarkable performance. Successive related works include the phase rotated conjugate cancellation (PRCC) [10], which solves the performance degradation problem of CC at high frequency offsets, and the adaptive receivers in [11] and [12] that deal with situations such as channel and frequency offset variations. Different from PRCC, the adaptive receivers are capable of estimating the frequency offset and then directly utilizing it without feedback to the transmitter.…”

Section: Introductionmentioning

confidence: 99%

An adaptive receiver design for OFDM-based cooperative relay systems using conjugate transmission

Wang

Shen

Bai

et al. 2012

2012 IEEE Global Communications Conference (GLOBECOM)

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In this paper, we propose an adaptive receiver design for OFDM-based cooperative relay systems using two-path conjugate transmission to achieve both diversity reception and intercarrier interference (ICI) cancellation. Considering that the relayed signals are affected by statistically independent channel fading gains and different frequency offsets, the proposed receiver applies not only phase rotations but also an amplitude scaling factor, whose values are optimized based on criteria of maximizing the carrier-to-interference ratio and minimizing the ICI power, respectively, on the two receiving paths to improve ICI cancellation performance. In order to track the channel and frequency offset variations under time-varying environments, we further develop an adaptive normalized block least meansquared algorithm to update the phase rotations and the amplitude scaling. Simulation results demonstrate that the proposed adaptive receiver provides significant performance improvement over related works for OFDM-based cooperative relay systems.Keywords-adaptive receiver; block least mean-squared (BLMS) algorithm; cooperative communications; frequency offset; intercarrier interference (ICI); ICI self-cancellation; orthogonal frequency division multiplexing (OFDM)

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“…In [8], Yeh et al proposed, ICI conjugate cancellation scheme to mitigate the effect of ICI but it could not guarantee satisfactory performance at high CFO. The BER performance of ICI cancellation scheme is further improved by Wang et al and the scheme called as phase rotated ICI conjugate cancellation [9].…”

Section: Introductionmentioning

confidence: 99%

Phase rotated ICI self-cancellation scheme with frequency diversity for OFDM systems

Goel

2013

2013 International Conference on Signal Processing and Communication (Icsc)

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Carrier frequency offset (CFO) destroys the orthogonality of the subcarriers and causes intercarrier interference (ICI). ICI self-cancellation scheme proposed by Zhao et al. is the simplest scheme to mitigate the effect of ICI. It repeats the same data symbol on two adjacent subcarriers with phase inversion and therefore does not provide any frequency diversity. To achieve frequency diversity Tang et al. proposed a symmetric data conjugate transmission scheme to mitigate the effect of ICI but its BER performance degrades at higher values of CFO. In order to improve its BER performance, a phase rotated symmetric data conjugate transmission scheme to mitigate the effect of ICI has been proposed in this paper. Like symmetric data conjugate scheme, proposed scheme also repeats the same data symbol with phase rotation on two symmetrically located subcarriers to achieve frequency diversity. The analytical expression for optimal phase rotation factor to optimize the carrier-to-interference ratio (CIR) performance of the proposed scheme is also derived. It has been shown that proposed scheme provides better performance than that of the conventional symmetric data conjugate scheme especially at high CFO.

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Intercarrier Interference Cancellation Using General Phase Rotated Conjugate Transmission for OFDM Systems

Cited by 21 publications

References 17 publications

Wideband Channel Modeling and Intercarrier Interference Cancellation for Vehicle-to-Vehicle Communication Systems

Wideband Channel Modeling and Intercarrier Interference Cancellation for Vehicle-to-Vehicle Communication Systems

An adaptive receiver design for OFDM-based cooperative relay systems using conjugate transmission

Phase rotated ICI self-cancellation scheme with frequency diversity for OFDM systems

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