A Unified Distortion Analysis of Nonlinear Power Amplifiers with Memory Effects for OFDM Signals

Yitao ZHANG; Kiyomichi ARAKI

doi:10.1587/transele.E93.C.489

A Unified Distortion Analysis of Nonlinear Power Amplifiers with Memory Effects for OFDM Signals

Yitao ZHANG, Kiyomichi ARAKI

Full Text Views

0

Cite this

Summary :

Nonlinear distortions in power amplifiers (PAs) generate spectral regrowth at the output, which causes interference to adjacent channels and errors in digitally modulated signals. This paper presents a novel method to evaluate adjacent channel leakage power ratio (ACPR) and error vector magnitude (EVM) from the amplitude-to-amplitude (AM/AM) and amplitude-to-phase (AM/PM) characteristics. The transmitted signal is considered to be complex Gaussian distributed in orthogonal frequency-division multiplexing (OFDM) systems. We use the Mehler formula to derive closed-form expressions of the PAs output power spectral density (PSD), ACPR and EVM for memoryless PA and memory PA respectively. We inspect the derived relationships using an OFDM signal in the IEEE 802.11a WLAN standard. Simulation results show that the proposed method is appropriate to predict the ACPR and EVM values of the nonlinear PA output in OFDM systems, when the AM/AM and AM/PM characteristics are known.

Publication: IEICE TRANSACTIONS on Electronics Vol.E93-C No.4 pp.489-496

Publication Date: 2010/04/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1587/transele.E93.C.489

Type of Manuscript: PAPER

Category: Electromagnetic Theory

Cite this

Copy

Yitao ZHANG, Kiyomichi ARAKI, "A Unified Distortion Analysis of Nonlinear Power Amplifiers with Memory Effects for OFDM Signals" in IEICE TRANSACTIONS on Electronics, vol. E93-C, no. 4, pp. 489-496, April 2010, doi: 10.1587/transele.E93.C.489.
Abstract: Nonlinear distortions in power amplifiers (PAs) generate spectral regrowth at the output, which causes interference to adjacent channels and errors in digitally modulated signals. This paper presents a novel method to evaluate adjacent channel leakage power ratio (ACPR) and error vector magnitude (EVM) from the amplitude-to-amplitude (AM/AM) and amplitude-to-phase (AM/PM) characteristics. The transmitted signal is considered to be complex Gaussian distributed in orthogonal frequency-division multiplexing (OFDM) systems. We use the Mehler formula to derive closed-form expressions of the PAs output power spectral density (PSD), ACPR and EVM for memoryless PA and memory PA respectively. We inspect the derived relationships using an OFDM signal in the IEEE 802.11a WLAN standard. Simulation results show that the proposed method is appropriate to predict the ACPR and EVM values of the nonlinear PA output in OFDM systems, when the AM/AM and AM/PM characteristics are known.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E93.C.489/_p

Copy

@ARTICLE{e93-c_4_489,
author={Yitao ZHANG, Kiyomichi ARAKI, },
journal={IEICE TRANSACTIONS on Electronics},
title={A Unified Distortion Analysis of Nonlinear Power Amplifiers with Memory Effects for OFDM Signals},
year={2010},
volume={E93-C},
number={4},
pages={489-496},
abstract={Nonlinear distortions in power amplifiers (PAs) generate spectral regrowth at the output, which causes interference to adjacent channels and errors in digitally modulated signals. This paper presents a novel method to evaluate adjacent channel leakage power ratio (ACPR) and error vector magnitude (EVM) from the amplitude-to-amplitude (AM/AM) and amplitude-to-phase (AM/PM) characteristics. The transmitted signal is considered to be complex Gaussian distributed in orthogonal frequency-division multiplexing (OFDM) systems. We use the Mehler formula to derive closed-form expressions of the PAs output power spectral density (PSD), ACPR and EVM for memoryless PA and memory PA respectively. We inspect the derived relationships using an OFDM signal in the IEEE 802.11a WLAN standard. Simulation results show that the proposed method is appropriate to predict the ACPR and EVM values of the nonlinear PA output in OFDM systems, when the AM/AM and AM/PM characteristics are known.},
keywords={},
doi={10.1587/transele.E93.C.489},
ISSN={1745-1353},
month={April},}

Copy

TY - JOUR
TI - A Unified Distortion Analysis of Nonlinear Power Amplifiers with Memory Effects for OFDM Signals
T2 - IEICE TRANSACTIONS on Electronics
SP - 489
EP - 496
AU - Yitao ZHANG
AU - Kiyomichi ARAKI
PY - 2010
DO - 10.1587/transele.E93.C.489
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E93-C
IS - 4
JA - IEICE TRANSACTIONS on Electronics
Y1 - April 2010
AB - Nonlinear distortions in power amplifiers (PAs) generate spectral regrowth at the output, which causes interference to adjacent channels and errors in digitally modulated signals. This paper presents a novel method to evaluate adjacent channel leakage power ratio (ACPR) and error vector magnitude (EVM) from the amplitude-to-amplitude (AM/AM) and amplitude-to-phase (AM/PM) characteristics. The transmitted signal is considered to be complex Gaussian distributed in orthogonal frequency-division multiplexing (OFDM) systems. We use the Mehler formula to derive closed-form expressions of the PAs output power spectral density (PSD), ACPR and EVM for memoryless PA and memory PA respectively. We inspect the derived relationships using an OFDM signal in the IEEE 802.11a WLAN standard. Simulation results show that the proposed method is appropriate to predict the ACPR and EVM values of the nonlinear PA output in OFDM systems, when the AM/AM and AM/PM characteristics are known.
ER -