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Multitone design for third order MIMO volterra kernels
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för elektronik, matematik och naturvetenskap, Elektronik. KTH Royal Institute of Technology, Stockholm, Sweden.ORCID-id: 0000-0002-9352-0261
Department of Electronics and Telecommunications, Universidad Catolica San Pablo, Arequipa, Peru.ORCID-id: 0000-0001-8460-6509
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.
2017 (Engelska)Ingår i: 2017 IEEE MTT-S International Microwave Symposium (IMS), IEEE conference proceedings, 2017, s. 1553-1556Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

This paper proposes a technique for designing multitone signals that can separate the third order multiple input multiple output (MIMO) Volterra kernels. Multitone signals fed to a 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 output from the MIMO Volterra kernels does not overlap in the frequency domain, hence making it possible to separate these kernels from the output of the MIMO Volterra system. The proposed technique is applied to a 2×2 RF MIMO transmitter to determine its dominant hardware impairments. For input crosstalk, the proposed method reveals the dominant self and cross kernels whereas for output crosstalk, the proposed method reveals that only the self kernels are dominant.

Ort, förlag, år, upplaga, sidor
IEEE conference proceedings, 2017. s. 1553-1556
Nyckelord [en]
Complexity theory, Crosstalk, Kernel, MIMO, Peak to average power ratio, Radio frequency, Transmitters
Nationell ämneskategori
Signalbehandling
Identifikatorer
URN: urn:nbn:se:hig:diva-25431DOI: 10.1109/MWSYM.2017.8058925ISI: 000425241500419Scopus ID: 2-s2.0-85032467119ISBN: 978-1-5090-6360-4 (tryckt)OAI: oai:DiVA.org:hig-25431DiVA, id: diva2:1150427
Konferens
2017 IEEE MTT-S International Microwave Symposium (IMS), 4-9 June 2017, Honolulu, USA
Tillgänglig från: 2017-10-19 Skapad: 2017-10-19 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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