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Bootsman, R.J. (author), Shen, Y. (author), Mul, D.P.N. (author), Rousstia, Mohadig (author), Heeres, Rob (author), van Rijs, Fred (author), Gajadharsing, John (author), Alavi, S.M. (author), de Vreede, L.C.N. (author)A high-power fully-digital Doherty transmitter (DDTX) is proposed. It features two segmented LDMOS output switch banks implemented in a custom V T -down-shifted LDMOS technology. A 40 nm CMOS controller digitally activates the individual LDMOS gate segments of the output stage at RF speed. An inverted Doherty power combiner is proposed that...conference paper 2022
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Bootsman, R.J. (author), Mul, D.P.N. (author), Shen, Y. (author), Hashemi, M. (author), Heeres, Rob M. (author), van Rijs, Fred (author), Alavi, S.M. (author), de Vreede, L.C.N. (author)Fully digital transmitters (DTXs) have the potential of replacing analog-intensive transmitter (TX) line-ups in future massive multiple-input and multiple-output (mMIMO) systems since they hold the promise of higher system integration level and energy efficiency. DTX operation so far has been limited to low RF output powers. This article...journal article 2022
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Shen, Y. (author), Bootsman, R.J. (author), Alavi, S.M. (author), de Vreede, L.C.N. (author)This article presents a wideband 2× 12 -bit direct-digital RF modulator (DDRM) operating in a 0.5-to-3-GHz band for 5G transmitters. The proposed digital Cartesian modulator features an advanced IQ-mapping technique to boost RF power by 3 dB and suppress the I/Q image. To verify the proposed concept, a 40-nm CMOS prototype is implemented...journal article 2022
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Bootsman, R.J. (author)Recent years have seen an exponential growth in required wireless data capacity. This exponential growth is expected to continue, while it is unsustainable if the power consumption associated with it will grow at the same rate. This calls for better power efficiency, which can usually be found in polar power amplifier architectures. This thesis...master thesis 2018
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Bootsman, R.J. (author), Lagerweij, P.G. (author)Dit document beschrijft de ontwikkeling van een detectie en classificatie algoritme voor een sensormodule. Deze sensormodule maakt gebruik van een radarmodule en een video camera. Dit project is uitgevoerd ten behoeve van het Bachelor afstudeerproject Electrical Engineering aan de TU Delft. Deze sensormodule had als doel het detecteren en...bachelor thesis 2014