An evaluation of PAPR reduction effects in OFDM systems using several power amplifier models

Koussa, Badreddin; Perrine, Clency; Bachir, Smaïl; Vauzelle, Rodolphe; Duvanaud, Claude

doi:10.1109/newcas.2013.6573625

Cited by 2 publications

References 7 publications

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Impact of nonlinear power amplifier on the transmission of scalable multimedia contents

Sohtsinda

Perrine

Bachir

et al. 2016

2016 IEEE International Conference on Electronics, Circuits and Systems (ICECS)

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International audienceThe transmission of highly scalable image and video codestream over error-prone networks can be ensured by using Unequal Power Allocation (UPA) in MIMO-OFDM systems. However, UPA schemes are usually designed without taking into account the High Power Amplifier (HPA) nonlinearity, especially in MIMO-OFDM systems which are known to generate signals with a high Peak-to-Average Power Ratio (PAPR). This paper aims to evaluate the impact of HPA nonlinearity on the transmission of scalable image cotents over a precoded Closed-Loop MIMO-OFDM system when the well-known Content-Based Precoder (CBP) is used for UPA. For PAPR reduction, we have considered the Tone Reservation Using Null Subcarriers (TRNS) technique. Simulations are performed under the IEEE 802.11n standard in a realistic urban environment in presence of a commercial 2W class-AB memoryless HPA from RF Micro Devices. The experimental results in terms of Bit Error Rate (BER) and visual quality show that the error-protection of the most sensitive parts of the codestream against channel distortions achieved using UPA is significantly disturbed in presence of HPA nonlinearity. These results highlight the influence of HPA nonlinearity on the scalable image transmission

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Impact of nonlinear power amplifier on the transmission of scalable multimedia contents

Sohtsinda

Perrine

Bachir

et al. 2016

2016 IEEE International Conference on Electronics, Circuits and Systems (ICECS)

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Amplifier-Aware Content-Based Precoder Design for Hierarchical Image Transmission over a Realistic MIMO-OFDM Channel

Sohtsinda

Perrine

Bachir

et al. 2019

J CIRCUIT SYST COMP

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This paper proposes the design of a precoder in MIMO systems dedicated to JPEG Wireless (JPWL) (ISO/IEC 15444-11) image transmission which jointly takes into account the channel noise and the nonlinear distortions due to the high power amplifier (HPA) used in the transmitter. MIMO-OFDM (Orthogonal Frequency Division Multiplexing) systems dedicated to image transmission rely only on the Channel State Information (CSI) and the image content to design their precoding solutions. However, the nonlinear behavior of the HPA used at the front-end is not taken into account when designing the current precoders. In order to ensure the QoS of the transmitted image, a large level back-off is usually applied to avoid the nonlinear distortions generated by the HPA. In addition, the Input Back-off (IBO) value is statically chosen and does not depend on the other parameters of the link such as the instantaneous MIMO channel status, the modulation order and the scalability of the JPWL content. This may reduce both the global energy efficiency and the transmission quality of the Radio-Frequency (RF) link. Therefore, this work proposes a new precoding scheme to allocate the total available power while dynamically adjusting the optimal power IBO value according to the HPA parameters, the instantaneous channel status and the image content to be transmitted. Numerical results using a commercial HPA model under the IEEE 802.11n standard show that the proposed power allocation algorithm improves the visual quality of the received JPWL images compared to the state-of-the-art over a realistic radio channel model.

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An evaluation of PAPR reduction effects in OFDM systems using several power amplifier models

Cited by 2 publications

References 7 publications

Impact of nonlinear power amplifier on the transmission of scalable multimedia contents

Impact of nonlinear power amplifier on the transmission of scalable multimedia contents

Amplifier-Aware Content-Based Precoder Design for Hierarchical Image Transmission over a Realistic MIMO-OFDM Channel

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