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Dirty MIMO Transmitters: Does It Matter?
KTH, School of Electrical Engineering and Computer Science (EECS), Information Science and Engineering.ORCID iD: 0000-0002-2718-0262
Univ Gavle, Dept Elect Math & Nat Sci, S-80176 Gavle, Sweden..
2018 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 17, no 8, p. 5425-5436Article in journal (Refereed) Published
Abstract [en]

The radio frequency transmitter is a key component in contemporary multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing systems. A detailed study of a 2 x 2 MIMO transmitter subjected to correlated input data streams, nonlinear distortion, thermal noise, and crosstalk is provided by stochastic modeling. The effects of correlated input streams, crosstalk, and nonlinearities are studied in detail and exemplified both by approximate expressions and numerical simulations. Key results include exact and approximate expressions for the normalized mean-squared error (NMSE) for systems with or without digital predistortion; the relationship between NMSE and the signal-to-noise-and-distortion ratio, the properties of the distortion noise, and a novel design for power amplifier back-off for MIMO transmitters subject to crosstalk. The theoretical derivations are illustrated by numerical examples and simulation results, and their relationships to the state-of-the-art research are discussed.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018. Vol. 17, no 8, p. 5425-5436
Keywords [en]
Orthogonal frequency division multiplexing (OFDM), input back-off, power amplifier, optimization, Bussgang theory
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-234629DOI: 10.1109/TWC.2018.2843764ISI: 000441933900034Scopus ID: 2-s2.0-85048562714OAI: oai:DiVA.org:kth-234629DiVA, id: diva2:1247790
Note

QC 20190913

Available from: 2018-09-13 Created: 2018-09-13 Last updated: 2018-09-13Bibliographically approved

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Händel, Peter

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