13.2 A digital multimode polar transmitter supporting 40MHz LTE Carrier Aggregation in 28nm CMOS

Fulde, M.; Belitzer, Alexander; Boos, Z.; Bruennert, Michael; Fritzin, Jonas; Geltinger, H.; Groinig, Marcus; Gruber, Daniel; Simon, Gruenberger; Hartig, Thomas; Kampus, Vahur; Boris, Kapfelsberger; Kuttner, F.; Leuschner, Stephan; Maletz, Thomas; Menkhoff, Andreas; Moreira, Jose; Paussa, Alan; Ponton, D.; Pretl, Harald; Sira, Daniel; Ulrich, S.; Stevanovic, N.

doi:10.1109/isscc.2017.7870339

Cited by 43 publications

(28 citation statements)

References 2 publications

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“…In this modulation approach, a "constant envelope" signal is fed to the PA and the amplitude variations are applied directly to its supply voltage. Thus the requirement on the linearity of the PA is greatly relaxed [115,27,89,43,52]. However, there are disadvantages with polar transmitters like the 2.1.…”

Section: Transmitter Architecturesmentioning

confidence: 99%

Studies on Selected Topics in Radio Frequency Digital-to-Analog Converters

Sadeghifar

2019

Linköping Studies in Science and Technology. Dissertations

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The network latency in fifth generation mobile technology (5G) will be around one millisecond which is much lower than in 4G technology. This significantly faster response time together with higher information capacity and ultra-reliable communication in 5G technology will pave the way for future innovations in a smart and connected society. This new 5G network should be built on a reasonable wireless infrastructure and 5G radio base stations that can be vastly deployed. That is, while the electrical specification of a radio base station in 5G should be met in order to have the network functioning, the size, weight and power consumption of the radio system should be optimized to be able to commercially deploy these radios in a huge network. Last but not least I would like to especially thank my soulmate and my love Hoda. Without all your help, your devotion and patience, I would not be able to complete this work. Therefore, I dedicate this work to you.

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Section: Transmitter Architecturesmentioning

confidence: 99%

Studies on Selected Topics in Radio Frequency Digital-to-Analog Converters

Sadeghifar

2019

Linköping Studies in Science and Technology. Dissertations

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“…Recently, a digitally-intensive multi-band, multi-standard cellular polar transmitter implemented in 28 nm CMOS utilizing RF C-DACs [12] with external PAs and two-point phase modulated RF-DPLL [4] has been shown to support 40 MHz contiguous intraband carrier aggregation in LTE-A uplink while also covering 2G and 3G cellular standards. The current trend in RF-DAC design for digitally-intensive transmitter architectures is to increase their output power by embedding the PA functionality on chip (RF-DPA).…”

Section: Transmittersmentioning

confidence: 99%

“…Note, that during the estimation process in stage 1, except for the modulated spur term in (12), the rest of the signal components act as noise for the estimation and therefore can be combined into a single noise source. By doing some simplifications, (12) can be written in matrix/vector form as…”

Section: Stage 1: Tx Modulated Spur Cancellationmentioning

confidence: 99%

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Digitally-intensive transceivers for future mobile communications—emerging trends and challenges

Kanumalli

Buckel

Preissl

et al. 2018

Elektrotech. Inftech.

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This article presents an overview of the major trends and challenges involved with the design of multi-band, multi-standard digitallyintensive radio frequency transceivers for next generation mobile communications. In addition, we discuss in detail one aspect of the implementation challenges, namely the occurrence and cancellation of self-interference especially in carrier aggregation modes. For that, we present a novel digital cancellation technique to jointly compensate the self-interference caused by transmit (Tx) modulated spurs and Tx second order intermodulation distortion products (IMD2) in the receiver. This architecture exploits the underlying relation between both types of interference and offers a low-complexity solution to mitigate the Tx-IMD2 interference. Simulation results show, that the proposed technique significantly suppresses both types of interference and restores the signal-to-noise ratio of the wanted signal within 0.3 dB from its value in the absence of interference, thereby achieving 30 dB of cancellation.Keywords: RF; mobile communications; wireless communications; signal processing; interference cancellation; carrier aggregation Digital unterstützte Hochfrequenz-Transceiver für den Mobilfunk der Zukunft -Trends und Herausforderungen. Dieser Artikel gibt zunächst einen Überblick über aktuellen Trends und Herausforderungen bei der Entwicklung von Multi-Band, Multi-Standard HF-Transceivern für die nächste Mobilfunk-Generation, die einen hohen Anteil an digitaler Elektronik aufweisen. Im Anschluss wird im Detail auf ein spezielles Problem solcher Transceiver eingegangen, nämlich der Selbst-Interferenz, die durch den eigenen Sender verursacht wird und die vor allem im Carrier Aggregation-Modus auftritt. Die Problematik wird nicht nur detailliert erklärt, diese Arbeit präsentiert auch eine Methode zur Unterdrückung von Selbst-Interferenz mit den Mitteln der digitalen

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“…Currently, most of the manufacturers of mobile communication chip-sets realize their RF TRX designs in 40 nm [7], 28 nm [11,12], or similar CMOS technologies.…”

Section: Simplified Lte-advanced Transceiver Architecturementioning

confidence: 99%

From microwatt to gigabit: challenges of modern radio design

Pretl¹,

Faseth²,

Schumacher³

et al. 2018

Elektrotech. Inftech.

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On the brink of introducing the fifth generation (5G) of cellular networks, the art of radio-frequency (RF) integrated circuit design has never seen such a wide spread of diverging requirements:On the one hand, ubiquitous sensor networks are mandating power budgets in the order of micro-watt. They should be constructed as energy-autonomous, wireless, low-cost sensor nodes. This demand is caused by massive deployment scenarios of billions of devices, which makes wires and batteries unpractical. As a result, the desire for the radio nodes to harvest their operational energy from the environment emerges.On the other hand, the recent and ongoing realization of gigabit-per-second capable cellular modems is driving hardware and power requirements to extremes. To overcome hardware limitations, introduced by analog impairments, digital correction and alignment algorithms are employed for compensation. These factors call for usage of expensive advanced CMOS technology nodes and increased utilization of digital signal processing techniques.In this paper, we recap ongoing trends and developments for ultra-low power and high-end transceiver (TRX) designs using CMOS technology nodes ranging from low-cost to highest performance.Keywords: RF; ultra-low-power; wireless architectures; transceiver; mixed-signal circuits; 5G Von Mikrowatt zu Gigabit: Herausforderungen beim Design moderner Funkübertragungssysteme. Neben der Einführung der zellularen Mobilfunknetze der fünften Generation (5G) muss sich auch die integrierte HochfrequenzSchaltungstechnik einer noch nie dagewesenen Breite an unterschiedlichen Anforderungen stellen: Auf der einen Seite gibt es überall kabellose Sensornetzwerke, denen nur eine geringe Menge an Versorgungsleistung im MikrowattBereich zur Verfügung steht. Daher müssen die Chips in diesem Bereich energieautark und möglichst kostengünstig entwickelt werden. Aufgrund der zu erwartenden hohen Stückzahlen (Milliarden von unterschiedlichsten Sensoren für verschiedene Anwendungen) sind eine drahtgebundene Energieversorgung oder der Einsatz von Batterien in vielen Fällen praktisch unmöglich. Somit wird es für die Sensoren immer wichtiger, ihre Energieversorgung aus der Umgebung zu gewinnen (Stichwort Energy Harvesting).

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13.2 A digital multimode polar transmitter supporting 40MHz LTE Carrier Aggregation in 28nm CMOS

Cited by 43 publications

References 2 publications

Studies on Selected Topics in Radio Frequency Digital-to-Analog Converters

Studies on Selected Topics in Radio Frequency Digital-to-Analog Converters

Digitally-intensive transceivers for future mobile communications—emerging trends and challenges

From microwatt to gigabit: challenges of modern radio design

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