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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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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booktitle = "Proceedings of the XXIXth URSI General Assembly in Chicago",
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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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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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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)