Low-complexity, Multi Sub-band Digital Predistortion: Novel Algorithms and SDR Verification

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dc.citation.journalTitleJournal of Signal Processing Systemsen_US
dc.contributor.authorTarver, Chanceen_US
dc.contributor.authorAbdelaziz, Mahmouden_US
dc.contributor.authorAnttila, Laurien_US
dc.contributor.authorCavallaro, Joseph R.en_US
dc.date.accessioned2017-11-29T16:35:27Zen_US
dc.date.available2017-11-29T16:35:27Zen_US
dc.date.issued2017en_US
dc.description.abstractThe nonlinearities of power amplifiers combined with non-contiguous transmissions found in modern, frequency-agile, wireless standards create undesirable spurious emissions through the nearby spectrum of data carriers. Digital predistortion (DPD) is an effective way of combating spurious emission violations without the need for a significant power reduction in the transmitter leading to better power efficiency and network coverage. In this paper, an iterative, multi sub-band version of the sub-band DPD, proposed earlier by the authors, is presented. The DPD learning is iterated over intermodulation distortion (IMD) sub-bands until a satisfactory performance is achieved for each of them. A sequential DPD learning procedure is also presented to reduce the hardware complexity when higher order nonlinearities are incorporated in the DPD learning. Improvements in the convergence speed of the adaptive DPD learning are also achieved via incorporating a variable learning rate and interpolation of previously trained DPD coefficients. A WarpLab implementation of the proposed DPD is also shown with excellent suppression of the targeted spurious emissions.en_US
dc.identifier.citationTarver, Chance, Abdelaziz, Mahmoud, Anttila, Lauri, et al.. "Low-complexity, Multi Sub-band Digital Predistortion: Novel Algorithms and SDR Verification." <i>Journal of Signal Processing Systems,</i> (2017) Springer: https://doi.org/10.1007/s11265-017-1303-1.en_US
dc.identifier.digital2017_JPSP_mainen_US
dc.identifier.doihttps://doi.org/10.1007/s11265-017-1303-1en_US
dc.identifier.urihttps://hdl.handle.net/1911/98868en_US
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Springer.en_US
dc.subject.keywordadaptive filtersen_US
dc.subject.keywordcarrier aggregationen_US
dc.subject.keyworddigital predistortionen_US
dc.subject.keywordnonlinear distortionen_US
dc.subject.keywordpower amplifieren_US
dc.subject.keywordsoftware-defined radioen_US
dc.subject.keywordspectrally-agile radioen_US
dc.subject.keywordspurious emissionen_US
dc.titleLow-complexity, Multi Sub-band Digital Predistortion: Novel Algorithms and SDR Verificationen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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