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- W3209972955 abstract "Increasing demand to provide higher data rates with spectral purity sets highstandards for future mobile communication systems. Future wireless communicationtransmitters are challenged to improve their performance with reduced powerconsumption. Work performed in this thesis aims at improving several key areas of awireless transmitter architecture to be more efficient and reliant on their powerconsumption.A novel calibration technique based on constellation mapping of a quadratureamplitude modulated (QAM) signal is proposed to alleviate the analog impairmentswithin a wireless transmitter at system level. This technique facilitates the mixed-signalapproach towards building efficient, linear transmitters.A primary front-end component of a wireless transmitter is the Power Amplifier(PA). Advanced architectures for PAs with improved power efficiency need to beexplored for these future wireless communication systems. Ameliorations made towardsimproving the hardware structure in literature provides a variety of advanced poweramplifier architectures. In analyzing the needs for the future mobile communicationstandards, and the complex nature of the signals involved, the Doherty power amplifier(DPA) architecture has indicated promise over the years. In this work, furtherimprovements have been made on existing state-of-the-art Doherty PA architectures toaid wider-bandwidth operation to transmit at higher data rates. A distributed structure offour-way digitally controlled inputs has been suggested and its operation was tested atKu-band frequency range.Furthermore, in simulating advanced PA architectures such as mentioned above,the time taken to perform a single simulation for a PA is significant. As a result, in-orderto perform a system level simulation of a transmitter with several PA’s and othercomponents will be even more apparent and less convenient. Therefore, for futuristicapplications such as distributed arrays, a method of behavioral modeling of a fabricatedasymmetrical DPA is suggested and tested." @default.
- W3209972955 created "2021-11-08" @default.
- W3209972955 creator A5010528731 @default.
- W3209972955 date "2018-01-01" @default.
- W3209972955 modified "2023-09-27" @default.
- W3209972955 title "Analog and Digital Co-design Methods for Future Wireless Transmitters" @default.
- W3209972955 hasPublicationYear "2018" @default.
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