Digital Pre-Distortion for Radio Transmitters with Multiple Sources of Impairment

Simple item page
dc.contributor.advisorHelaoui, Mohamed
dc.contributor.advisorGhannouchi, Fadhel
dc.contributor.authorMotaqi, Ahmadreza
dc.contributor.committeememberMohammadi, Abbas
dc.contributor.committeememberFapojuwo, Abraham
dc.contributor.committeememberSesay, Abu B.
dc.contributor.committeememberAbou Zeid, Hatem
dc.date2022-11
dc.date.accessioned2022-08-18T16:14:02Z
dc.date.available2022-08-18T16:14:02Z
dc.date.issued2022-08
dc.description.abstractAmong the most important factors in wireless base-stations design are link speed and power efficiency. For a faster wireless connection, the MIMO beamforming technology, higher-order QAM signals, and wider bandwidth signals are used. To increase the power efficiency in transmitters, the PAs are pushed to operate in nonlinear regions where they present their highest power efficiency. These techniques increase in-band and out-of-band distortions of the MIMO wireless transmitters, resulting in signal quality degradation. To mitigate the introduced distortions to the transmitted signal, Digital Pre-Distortion (DPD) is used. However, the conventional DPD techniques cannot meet the strict timing requirements of 5G and 6G wireless connections. The transmitter nonlinearities are a function of various parameters such as input signal average power and ambient temperature and steering angle in the case of beamforming. This thesis studies the effect of ambient temperature and signal’s average power on high-power PAs and proposes a novel DPD technique to mitigate the effect of those parameters on the PA behaviour. In another research, the effect of beamforming on the transmitter performance in terms of signal quality and out-of-band distortions are studied. A novel angle inclusive DPD for beamforming application is introduced to remove beamforming-related distortions and enhance the signal quality. This technique provides an uninterrupted linearization at any beam direction. The developed algorithms are verified using a realistic MIMO beamforming setup designed in the laboratory. The measurement results have shown that by using the proposed technique, the signal quality is substantially improved when compared to state-of-the-art techniques.en_US
dc.identifier.citationMotaqi, A. (2022). Digital pre-distortion for radio transmitters with multiple sources of impairment (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.en_US
dc.identifier.urihttp://hdl.handle.net/1880/115108
dc.identifier.urihttps://dx.doi.org/10.11575/PRISM/40149
dc.language.isoengen_US
dc.publisher.facultySchulich School of Engineeringen_US
dc.publisher.institutionUniversity of Calgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.subjectDigital Pre-distortionen_US
dc.subjectPower amplifieren_US
dc.subjectBeamformingen_US
dc.subject5Gen_US
dc.subject.classificationEngineering--Electronics and Electricalen_US
dc.titleDigital Pre-Distortion for Radio Transmitters with Multiple Sources of Impairmenten_US
dc.typedoctoral thesisen_US
thesis.degree.disciplineEngineering – Electrical & Computeren_US
thesis.degree.grantorUniversity of Calgaryen_US
thesis.degree.nameDoctor of Philosophy (PhD)en_US
ucalgary.item.requestcopytrueen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
ucalgary_2022_motaqi_ahmadreza.pdf
Size:
5.12 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.62 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Open Theses and Dissertations