Nonlinear phenomena in beamforming

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    In this paper we present a summary of nonlinear system level problems in beamforming. The paper summarizes first the nonideal phenomena in power amplifiers, mixers, and oscillators. In digital predistortion inversion of the nonlinearity is needed. Not all linear and nonlinear systems are invertible or they may have only a preinverse or postinverse. Commutation is needed in indirect learning architectures for predistortion. The spatial and temporal order of compensation of different distortions is discussed. Some numerical results are also included.
    Original languageEnglish
    Title of host publicationProceedings of the XXIXth URSI General Assembly in Chicago
    PublisherInternational Union of Radio Science
    Number of pages4
    Publication statusPublished - 2008
    MoE publication typeA4 Article in a conference publication
    EventXXIXth URSI General Assembly 2008 - Chicago, United States
    Duration: 7 Aug 200816 Aug 2008

    Conference

    ConferenceXXIXth URSI General Assembly 2008
    CountryUnited States
    CityChicago
    Period7/08/0816/08/08

    Fingerprint

    Beamforming
    Nonlinear systems
    Mixer circuits
    Control nonlinearities
    Electric commutation
    Power amplifiers
    Linear systems
    Compensation and Redress

    Cite this

    Mämmelä, A., Kiviranta, M., & Paaso, H. (2008). Nonlinear phenomena in beamforming. In Proceedings of the XXIXth URSI General Assembly in Chicago [C03.7(46)] International Union of Radio Science.
    Mämmelä, Aarne ; Kiviranta, Markku ; Paaso, Henna. / Nonlinear phenomena in beamforming. Proceedings of the XXIXth URSI General Assembly in Chicago. International Union of Radio Science, 2008.
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    title = "Nonlinear phenomena in beamforming",
    abstract = "In this paper we present a summary of nonlinear system level problems in beamforming. The paper summarizes first the nonideal phenomena in power amplifiers, mixers, and oscillators. In digital predistortion inversion of the nonlinearity is needed. Not all linear and nonlinear systems are invertible or they may have only a preinverse or postinverse. Commutation is needed in indirect learning architectures for predistortion. The spatial and temporal order of compensation of different distortions is discussed. Some numerical results are also included.",
    author = "Aarne M{\"a}mmel{\"a} and Markku Kiviranta and Henna Paaso",
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    language = "English",
    booktitle = "Proceedings of the XXIXth URSI General Assembly in Chicago",
    publisher = "International Union of Radio Science",
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    Mämmelä, A, Kiviranta, M & Paaso, H 2008, Nonlinear phenomena in beamforming. in Proceedings of the XXIXth URSI General Assembly in Chicago., C03.7(46), International Union of Radio Science, XXIXth URSI General Assembly 2008, Chicago, United States, 7/08/08.

    Nonlinear phenomena in beamforming. / Mämmelä, Aarne; Kiviranta, Markku; Paaso, Henna.

    Proceedings of the XXIXth URSI General Assembly in Chicago. International Union of Radio Science, 2008. C03.7(46).

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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    AU - Kiviranta, Markku

    AU - Paaso, Henna

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    N2 - In this paper we present a summary of nonlinear system level problems in beamforming. The paper summarizes first the nonideal phenomena in power amplifiers, mixers, and oscillators. In digital predistortion inversion of the nonlinearity is needed. Not all linear and nonlinear systems are invertible or they may have only a preinverse or postinverse. Commutation is needed in indirect learning architectures for predistortion. The spatial and temporal order of compensation of different distortions is discussed. Some numerical results are also included.

    AB - In this paper we present a summary of nonlinear system level problems in beamforming. The paper summarizes first the nonideal phenomena in power amplifiers, mixers, and oscillators. In digital predistortion inversion of the nonlinearity is needed. Not all linear and nonlinear systems are invertible or they may have only a preinverse or postinverse. Commutation is needed in indirect learning architectures for predistortion. The spatial and temporal order of compensation of different distortions is discussed. Some numerical results are also included.

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    BT - Proceedings of the XXIXth URSI General Assembly in Chicago

    PB - International Union of Radio Science

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    Mämmelä A, Kiviranta M, Paaso H. Nonlinear phenomena in beamforming. In Proceedings of the XXIXth URSI General Assembly in Chicago. International Union of Radio Science. 2008. C03.7(46)