On Cubic Metric Reduction in OFDM Systems by Tone Reservation

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

doi:10.1109/tcomm.2011.042111.070613

Cited by 26 publications

(15 citation statements)

References 12 publications

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“…For values below 0.05 our approach is close to the state of the art, as the PAPR gain increases from 5.2 to 6.2 dB for τ = 0.01. Moreover, it should be noted that the state of the art, which is capable of surpassing the 3.0 dB margin, in general has a much higher computational complexity [7], [8]. The simplified, low-complexity PAPR reduction techniques have a much lower gain.…”

Section: Resultsmentioning

confidence: 99%

Peak-to-average power ratio reduction for OFDM based on dynamic range compression

Gorlow

Kollár

2015

2015 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting

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Abstract-We present a peak-to-average power ratio (PAPR) reduction method for orthogonal frequency-division multiplexing (OFDM) or similar modulation schemes based on dynamic range compression and decompression. Initially, the decompressor was developed for compressed audio signals. With regard to OFDM, the greatest benefit of the method is that it can be easily adjusted to the system requirements and a tradeoff can be found between the PAPR gain and signal distortion. Practically, it requires no additional side information at the receiver. In a pilot experiment, we evaluate the method using four different metrics and give a brief interpretation of the obtained results.

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Section: Resultsmentioning

confidence: 99%

Peak-to-average power ratio reduction for OFDM based on dynamic range compression

Gorlow

Kollár

2015

2015 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting

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“…The presence of these transitions between modulated symbols increases peak-to-average power ratio (PAPR) and cubic metric (CM) [4,5,14]. In order to analyze the nonlinear effects in SC-FDMA, two types of memoryless power amplifier models have been assumed throughout this paper: Saleh model and soft limiter.…”

Section: System Modelmentioning

confidence: 99%

Iterative Suboptimal Maximum Likelihood Receiver for Nonlinearly Distorted SC-FDMA Symbols

Gazda¹,

Deumal²,

Bergadà³

et al. 2011

Frequenz

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Single Carrier Frequency Division Multiple Access (SC-FDMA) is the modulation scheme being employed in the uplink of Long Term Evolution (LTE) and will also be employed in the upcoming fourth generation (4G) system LTE Advanced. The main advantage of using SC-FDMA in the uplink in opposite to the traditional orthogonal frequency division multiple access (OFDM) is its lower sensitivity to nonlinear amplification. Nevertheless, the strict requirements of 4G systems suggest that techniques to reduce sensitivity even further should be introduced. In this paper, we evaluate the effect of nonlinearities in SC-FDMA and present an iterative receiver scheme to reduce the error probability of SC-FDMA systems undergoing nonlinear amplification. The technique consists in successive estimation and compensation of both the nonlinear distortion and the non-constant attenuation and rotation introduced by the transmitter high power amplifier (HPA). Simulation results expressed by the bit error rate (BER), the error vector magnitude (EVM) and the total degradation (TD) show that the proposed iterative receiver provides a significant performance improvement.

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“…Estudos sobre PAPR e CM sugerem que a CM está mais intimamente relacionada com a quantidade de distorção induzida por um amplificador de potência não-linear do que a PAPR [12]. Tal como ocorre na PAPR, pesquisas vem sendo realizadas sobre técnicas que reduzam a CM [13] [14]. Dessa forma, esse trabalho propõe também um conjunto de técnicas que tomam como base a métrica CM, além de comparar a relação entre essas duas métricas, PAPR e CM.…”

Section: Introductionunclassified

Métodos de Redução de Picos em Sistemas OFDM Cooperativos Baseados na Técnica PTS

Teles¹,

Fernandes²

2017

Anais De XXXV Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

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Resumo-Este artigo propõe um conjunto de técnicas para redução de picos em um sistema OFDM (Orthogonal Frequency Division Multiplexing) cooperativo com relay AF (Amplify and Forward) e PA's não lineares (nonlinear Power Amplifiers). O conjunto de técnicas baseia-se na técnica PTS (Partial Transmit Sequences) e utilizam como métricas para escolha dos sinais transmitidos a PAPR (Peak-to-Average Power Ratio) e a CM (Cubic Metric). Ambas as métricas são utilizadas para aferir a quantidade de distorção introduzida por PA's, de forma que a minimização das mesmas fornecem ganhos significativos ao sistema de comunicação. Resultados de simulações são apresentadas para avaliar o desempenho do conjunto de técnicas propostas.

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On Cubic Metric Reduction in OFDM Systems by Tone Reservation

Cited by 26 publications

References 12 publications

Peak-to-average power ratio reduction for OFDM based on dynamic range compression

Peak-to-average power ratio reduction for OFDM based on dynamic range compression

Iterative Suboptimal Maximum Likelihood Receiver for Nonlinearly Distorted SC-FDMA Symbols

Métodos de Redução de Picos em Sistemas OFDM Cooperativos Baseados na Técnica PTS

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