NDLI: Closed-form approximations to the out-of-band emission due to nonlinear power amplifier

Content Provider	IEEE Xplore Digital Library
Author	Meng Wah Chia Yonghong Zeng Ying-Chang Liang
Copyright Year	2013
Description	Author affiliation: Inst. for Infocomm Res., Singapore, Singapore (Meng Wah Chia; Yonghong Zeng; Ying-Chang Liang)
Abstract	The total out-of-band emission (OOBE) from the secondary users (SU) is determined not only by the baseband signaling waveforms, but also by the design of the transmitter chain, which includes the nonlinear power amplifier (PA). The increase in OOBE due to a nonlinear PA has been well-observed, but its characterization involves complicated analysis. In this paper, we present a closed-form approximation to the power spectral density (PSD) of a signal at the output of a nonlinear PA, or more specifically, the solid-state power amplifier (SSPA). The SSPA's response can be approximated using a third order nonlinear model (TONM) which has been proposed in literature. Using the TONM, we proposed a statistical approximation, together with a piecewise linear model, to determine a closed-form estimate to the OOBE of the PA output signal. Simulation results show a close fit between the theoretical expression for the derived PSD and the simulated model. Since the nonlinear PA increases the OOBE due to spectral regrowth, the ability to characterize this behavior is of particular importance to the application of TV band devices (in television broadcast frequency bands) that need to fulfill certain OOBE limits.
Starting Page	4032
Ending Page	4036
File Size	518933
Page Count	5
File Format	PDF
ISBN	9781467359382
ISSN	15253511
e-ISBN	9781467359399
e-ISBN	9781467359375
DOI	10.1109/WCNC.2013.6555222
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-04-07
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM Piecewise linear approximation Convolution Linear approximation TV Correlation Cognitive radio Power amplifier Out-of-band emission
Content Type	Text
Resource Type	Article

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