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Extraction of the Third-Order 3x3 MIMO Volterra Kernel Outputs Using Multitone Signals
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för elektronik, matematik och naturvetenskap, Elektronik. Department of Information Science and Engineering, KTH Royal Institute of Technology, Stockholm, Sweden.ORCID-id: 0000-0002-9352-0261
Universidad Católica San Pablo, Arequipa, Peru.ORCID-id: 0000-0001-8460-6509
Department of Information Science and Engineering, KTH Royal Institute of Technology, Stockholm, Sweden.ORCID-id: 0000-0002-2718-0262
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för elektronik, matematik och naturvetenskap, Elektronik.
2018 (Engelska)Ingår i: IEEE transactions on microwave theory and techniques, ISSN 0018-9480, E-ISSN 1557-9670, Vol. 66, nr 11, s. 4985-4999Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This paper uses multitone signals to simplify the analysis of 3×3 multiple-input multiple-output (MIMO) Volterra systems by isolating the third-order kernel outputs from each other. Multitone signals fed to an MIMO Volterra system yield a spectrum that is a permutation of the sums of the input signal tones. This a priori knowledge is used to design multitone signals such that the third-order kernel outputs are isolated in the frequency domain. The signals are designed by deriving the conditions for the offset and spacing of the input frequency grids. The proposed technique is then validated for the six possible configurations of a 3x3 RF MIMO transmitter impaired by crosstalk effects. The proposed multitone signal design is used to extract the third-order kernel outputs, and their relative contributions are analyzed to determine the dominant crosstalk effects for each configuration.

Ort, förlag, år, upplaga, sidor
IEEE, 2018. Vol. 66, nr 11, s. 4985-4999
Nyckelord [en]
Crosstalk; hardware impairments; multiple-input multiple-output (MIMO); multitone signals; Volterra kernels
Nationell ämneskategori
Signalbehandling
Identifikatorer
URN: urn:nbn:se:hig:diva-27812DOI: 10.1109/TMTT.2018.2854186ISI: 000449354500028Scopus ID: 2-s2.0-85052719621OAI: oai:DiVA.org:hig-27812DiVA, id: diva2:1244479
Tillgänglig från: 2018-09-01 Skapad: 2018-09-01 Senast uppdaterad: 2019-11-29Bibliografiskt granskad
Ingår i avhandling
1. Characterization and Compensation of Hardware Impairments in Transmitters for Wireless Communications
Öppna denna publikation i ny flik eller fönster >>Characterization and Compensation of Hardware Impairments in Transmitters for Wireless Communications
2018 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Increasing demands for data rate, energy efficiency and reliability in wireless communications have resulted in the introduction of radio frequency (RF) multiple input multiple output (MIMO) transmitters. However, MIMO transmitters suffer from additional crosstalk impairments along with the power amplifier (PA) and I/Q imbalance distortions observed in single input single output (SISO) transmitters. Therefore, this thesis focuses on the characterization and compensation of these hardware impairments in RF SISO and MIMO transmitters.

PA distortions are often compensated using the Volterra series, but it suffers from high computational complexity. Therefore, a non-parametric method based on density estimation has been proposed in this thesis to estimate the PA transfer function, from which pruned Volterra models can be developed. The method is validated for a Doherty PA and achieves competitive error performance at a lower complexity than its competitors.

For MIMO transmitters, a characterization technique that uses multitone excitation signals has been proposed. Multitone signals yield non-overlapping tones at the outputs of the MIMO Volterra kernels. These kernel outputs are used to identify the dominant crosstalk impairments, from which block structure and base-band behavioral models are developed. The method is validated for 2x2 and 3x3 MIMO transmitters and it is shown that the derived models achieve a better complexity accuracy trade-off than the other pruned MIMO Volterra models considered in this thesis.

Finally, the thesis presents compensation models for joint static I/Q imbalance and MIMO PA distortions based on conjugate pair and real-valued basis functions. The models are augmented with sub-sample resolution to compensate for dynamic I/Q imbalance distortions. The proposed models are validated for a 2x2 RF MIMO transmitter and achieve a better complexity accuracy trade-off than the other state-of-the-art models considered in this thesis.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2018. s. 65
Serie
TRITA-EECS-AVL ; 2018:60
Nyckelord
Power amplifier, RF transmitters, SISO, MIMO, crosstalk, Volterra series, Volterra kernels, behavioral modeling, DPD, Ramanujan sums, multitone signals, I/Q Imbalance, non-linearity, memory polynomial, density estimation, hardware impairments
Nationell ämneskategori
Signalbehandling
Identifikatorer
urn:nbn:se:hig:diva-27935 (URN)978-91-7729-924-0 (ISBN)
Disputation
2018-10-18, Hörsal 12:108, Kungsbäcksvägen 47, Gävle, 13:15 (Engelska)
Opponent
Handledare
Tillgänglig från: 2018-09-21 Skapad: 2018-09-21 Senast uppdaterad: 2018-09-24Bibliografiskt granskad

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