Constrained Clipping for Peak Power Reduction of Multicarrier Systems by Tone Reservation

Deumal, M.; Behravan, Ali; Eriksson, Thomas; Pijoan, J.L.

doi:10.1109/vetecs.2007.453

Cited by 7 publications

(14 citation statements)

References 6 publications

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“…Unfortunately, they suffer from significant implementation difficulties or specific requirements for a certain standard; in other words, they are not for general purposes. Therefore, four of the methods were illustrated in [1] as peak windowing [37], noise shaping [38], peak cancellation (PC-CFR) [39]- [42], and constrained clipping [43]- [45] for ET purpose selection. Among them, although PC-CFR is one of the most popular solutions in practical engineering, it may suffer from serious peak EVM degradations, resulting in lower throughput when the clipping ratio is high.…”

Section: Digital Front-end Design For Envelope Trackingmentioning

confidence: 99%

Demystifying Envelope Tracking: Use for High-Efficiency Power Amplifiers for 4G and Beyond

Wang

2015

IEEE Microwave

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Section: Digital Front-end Design For Envelope Trackingmentioning

confidence: 99%

Demystifying Envelope Tracking: Use for High-Efficiency Power Amplifiers for 4G and Beyond

Wang

2015

IEEE Microwave

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“…But as long as the number of data tones is not too few, such a dependency is negligible since the output of the OFDM modulator may be modeled as a Gaussian random process [6] [11].…”

Section: System Modelmentioning

confidence: 99%

“…In [1], the PRT was designed through manipulating clipping noise generated from a soft limiter with a predefined clipping threshold. Despite being suboptimal, subsequent works [6] [7] demonstrated that the PAPR can be effectively reduced. A further improved PAPR reduction can be reached through scaling the peak-canceling signal properly.…”

Section: Introductionmentioning

confidence: 99%

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A Tone Reservation Method Combining Linear Clipping and PRT-Aided Detection Algorithm

Zhang

Wang

2011

2011 IEEE Vehicular Technology Conference (VTC Fall)

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In tone reservation (TR) methods, the high peak-toaverage power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals is reduced through exploiting the reserved tones, i.e., peak-reduction tones (PRT), so as to manipulate the clipping noise generated from the soft limiter with predefined clipping threshold. In this work, from the leastsquares perspective, the PRT are designed with linear operation only and a corresponding clipping threshold is proposed by a simple closed-form formula. Furthermore, a PRT-aided detection algorithm for the receiver is proposed to exploit the information embedded in the PRT, which is a linear function of the datatone signal. The data-tones and PRT are jointly and iteratively estimated to increase the accuracy of detection. No extra receiveside information is required in the proposed method. Simulation results reveal that a remarkable gain in bit error rate (BER) is achieved.

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“…ACE and TR techniques are implemented as described in Refs. [6] and [10], respectively. PTS and SLM are implemented as in Ref.…”

Section: Performance Of the Papr-reduced Systemmentioning

confidence: 99%

Evaluation of Performance Improvement Capabilities of PAPR-reducing Methods

Deumal

Behravan

Eriksson

et al. 2007

Wireless Pers Commun

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One of the major drawbacks of multicarrier modulation is the large envelope fluctuations which either require an inefficient use of high power amplifiers or decrease the system performance. Peak-to-average power ratio (PAPR) is a very well known measure of the envelope fluctuations and has become the cost function used to evaluate and design multicarrier systems. Several PAPR-reducing techniques have been proposed with the aim to alleviate back-off specifications or increase the system performance. Besides the fact that these techniques have varying PAPR-reduction capabilities, power, bandwidth and complexity requirements, it is interesting to notice that the performance of a system employing these techniques has not been fully analyzed. In this paper we, first, develop a theoretical framework for both PAPR and the distortion introduced by a nonlinearity, and then simulate an OFDM system employing several well known PAPR-reducing techniques from the literature. By means of the theoretical analysis and the simulation results we will show the relation between PAPR and the performance of OFDM systems when a clipping device is present and we will evaluate the real performance improvement capabilities of the PAPR-reducing methods. The agreement between the theoretical and the simulation results demonstrate the validity of the analysis.

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Constrained Clipping for Peak Power Reduction of Multicarrier Systems by Tone Reservation

Cited by 7 publications

References 6 publications

Demystifying Envelope Tracking: Use for High-Efficiency Power Amplifiers for 4G and Beyond

Demystifying Envelope Tracking: Use for High-Efficiency Power Amplifiers for 4G and Beyond

A Tone Reservation Method Combining Linear Clipping and PRT-Aided Detection Algorithm

Evaluation of Performance Improvement Capabilities of PAPR-reducing Methods

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