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Understanding Normalized Mean Squared Error in Power Amplifier Linearization
KTH, School of Electrical Engineering and Computer Science (EECS), Information Science and Engineering.ORCID iD: 0000-0002-2718-0262
2018 (English)In: IEEE Microwave and Wireless Components Letters, ISSN 1531-1309, E-ISSN 1558-1764, Vol. 28, no 11, p. 1047-1049Article in journal (Refereed) Published
Abstract [en]

This letter provides a detailed analysis of the normalized mean squared error (NMSE) of an ideal orthogonal frequency-division multiplexing (OFDM) system, subject to soft clipping of the power amplifier (PA) output. Based on the central limit theorem, the OFDM baseband input is modeled as white Gaussian noise, and based on the Bussgang theorem, the NMSE is studied in some detail. Asymptotes describing the NMSE for the considered system are derived, when the system is working in the linear operation mode and when working under compression, respectively. Detailed yet simple expressions between the NMSE, average output power, saturation voltage of the PA, and the noise level of the additive channel or thermal noise are derived, which are believed to provide insight into the system's behavior.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC , 2018. Vol. 28, no 11, p. 1047-1049
Keywords [en]
Linearization, nonlinear systems, normalized mean square error (NMSE), power amplifier (PA)
National Category
Computer Systems
Identifiers
URN: urn:nbn:se:kth:diva-239800DOI: 10.1109/LMWC.2018.2869299ISI: 000450161400031Scopus ID: 2-s2.0-85055023874OAI: oai:DiVA.org:kth-239800DiVA, id: diva2:1276585
Note

QC 20190108

Available from: 2019-01-08 Created: 2019-01-08 Last updated: 2019-01-08Bibliographically approved

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Händel, Peter

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  • Other locale
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