A novel method for PAPR reduction of the OFDM signal using nonlinear scaling and FM

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Frontiers of Information Technology & Electronic Engineering

2019, Volume 20, Issue 11, Pages 1587-1594

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A novel method for PAPR reduction of the OFDM signal using nonlinear scaling and FM

10.1631/FITEE.1800438

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Abstract

(OFDM) has been adopted as standard beginning with the 4 generation mobile communication system because of its high-bit-rate transmission capability under frequency selective fading channel conditions. However, a major disadvantage of OFDM is the non-constant envelope signal with a high (PAPR). The high peak signal in OFDM is distorted through a nonlinear amplifier, which causes bit error ratio (BER) reduction. Many techniques have been developed for reducing PAPR at the cost of inefficient bandwidth usage or throughput because of the additional information about PAPR reduction. We propose a novel method, in which the high peak signal above the threshold of the nonlinear amplification region is nonlinearly downscaled to lower the PAPR. The time slot location and scaling ratio for where and how the high peak baseband OFDM signal is downscaled are transmitted using (FM) combined with OFDM, which requires less additional bandwidth than the previously proposed methods. Simulation results show that the proposed novel method provides a lower PAPR and elicits a better BER performance compared with other conventional methods, because it reduces the PAPR by and restores the pre-distorted signal using FM.

Keywords

正交频分复用；峰均比；非线性缩放；调频技术

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Frontiers of Information Technology & Electronic Engineering

A novel method for PAPR reduction of the OFDM signal using nonlinear scaling and FM

Abstract

Keywords

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Figures(5)

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其他(2)

Frontiers of Information Technology & Electronic Engineering

A novel method for PAPR reduction of the OFDM signal using nonlinear scaling and FM

Abstract

Keywords

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