A Novel Multilevel RF-PWM Method With Active-Harmonic Elimination for All-Digital Transmitters

Yao, Fuqiang; Zhou, Qiang; Wei, Zhihu

doi:10.1109/tmtt.2018.2808946

Cited by 21 publications

(17 citation statements)

References 33 publications

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“…Unfortunately, the low speed of the analog circuitry required for implementing the modulator prevented its use at the MHz range for 25 years [33]. The development of digital control technology has avoided the bottleneck caused by the analogbased modulator, thus promoting its use even at the GHz range for implementing RF SMPAs [34][35][36][37]. In VLC, the frequency is not as challenging as in that case.…”

Section: Radiofrequency Pulse-width Modulated Class D Smpamentioning

confidence: 99%

On the Use of Class D Switching-Mode Power Amplifiers in Visible Light Communication Transmitters

Garcia-Mere

Rodríguez

Lamar

et al. 2022

Sensors

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Visible Light Communication (VLC) is a wireless communication technology that uses visible light to transmit information. The most extended implementation of a VLC transmitter employs a DC-DC power converter that biases the High-Brightness LEDs (HB-LEDs), and a Linear Power Amplifier (LPA) that reproduces the communication signal. Unfortunately, the power efficiency of LPAs is very low, thus reducing the overall system efficiency and requiring huge cooling systems to extract the heat. In this work, the use of Class D Switching-Mode Power Amplifiers (SMPAs) is explored in order to overcome that limitation. It is important to note that this SMPA is widely used for different applications, such as audio and RF power amplifiers. Therefore, there are a lot of versions of a Class D SMPA depending on the topology used for the implementation and the modulation strategy used to control the switches. Hence, this work aims to identify, adapt and explain in detail the best approach for implementing a Class D SMPA for VLC. In order to validate the proposed idea, a power-efficient VLC transmitter intended for short-range and low-speed applications was built and evaluated.

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Section: Radiofrequency Pulse-width Modulated Class D Smpamentioning

confidence: 99%

On the Use of Class D Switching-Mode Power Amplifiers in Visible Light Communication Transmitters

Garcia-Mere

Rodríguez

Lamar

et al. 2022

Sensors

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“…In fact the complexity of the transmitter is pushed towards digital which benefits from implementation point of view, such as power and cost perspective. The latest trend also shows that digital-intensive transceiver is the way forward to address the higher capacity and emerging wireless technologies [115,33,101,129,25,26]. Figure 6.1 shows the block diagram of a digital IQ transmitter featuring a DRFC.…”

Section: Digital Iq Transmitter Architecturementioning

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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“…In fact the complexity of the transmitter is pushed towards digital which benefits from implementation point of view, such as power and cost perspective. The latest trend also shows that digital-intensive transceiver is the way forward to address the higher capacity and emerging wireless technologies [2,3,4,5]. Figure 1 shows the block diagram of a digital IQ transmitter featuring a DRFC.…”

Section: Digital Iq Transmitter Architecturementioning

confidence: 99%

Direct digital-to-RF converter employing semi-digital FIR voltage-mode RF DAC

et al. 2019

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A direct digital-to-RF converter (DRFC) is presented in this work. Due to its digital-in-nature design, the DRFC benefits from technology scaling and can be monolithically integrated into advance digital VLSI systems. A fourthorder single-bit quantizer bandpass digital Σ∆ modulator is used preceding the DRFC, resulting in a high in-band signal-to-noise ratio (SNR). The out-ofband spectrally-shaped quantization noise is attenuated by an embedded semidigital FIR filter (SDFIR). The RF output frequencies are synthesized by a novel configurable voltage-mode RF DAC solution with a high linearity performance.The configurable RF DAC is directly synthesizing RF signals up to 10 GHz in first or second Nyquist zone. The proposed DRFC is designed in 22 nm FDSOI CMOS process and with the aid of Monte-Carlo simulation, shows 78.6 dBc and 63.2 dBc worse case third intermodulation distortion (IM3) under process mismatch in 2.5 GHz and 7.5 GHz output frequency respectively.

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A Novel Multilevel RF-PWM Method With Active-Harmonic Elimination for All-Digital Transmitters

Cited by 21 publications

References 33 publications

On the Use of Class D Switching-Mode Power Amplifiers in Visible Light Communication Transmitters

On the Use of Class D Switching-Mode Power Amplifiers in Visible Light Communication Transmitters

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

Direct digital-to-RF converter employing semi-digital FIR voltage-mode RF DAC

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