A Novel Interpolation Method for Polar Signals in Radio Frequency Transmitters

Klinkan, Alexander; Pfann, E.; Huemer, Mario

doi:10.1109/tcsii.2018.2823201

Cited by 4 publications

(5 citation statements)

References 12 publications

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“…Two additional complexities, which are omitted in the Figure for simplicity, are the different data rates for the DTC and PLL modulation input as well as the synchronization of both signal paths. The different data rates can be generated with a Fractional Sample-Rate Converter (FSRC) as published in [32]. The synchronization can be realized with buffer stages, the required delay is constant but design dependent.…”

Section: ) Subtractive Dither With a 2nd Dtcmentioning

confidence: 99%

Dithering Concepts for Spur-Free Nonlinear DTC-Based Frequency Synthesizers

Preissl

Preyler

Springer

et al. 2021

IEEE Trans. Circuits Syst. I

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Digital-to-time converters (DTCs) are a promising technology for radio frequency (RF) transceivers but are prone to spur generation. A common approach to change the spurious emissions to a spur-free shape is a method called dithering. The power added due to dithering is an important aspect of this approach and gives raise to investigations on additive dither as well as methods for subtractive dithering. This work presents a mathematical model for dithering DTC-based local oscillator (LO) generators. It proposes concepts for the application of subtractive dither and it introduces a novel generalization of quantization-dither to allow for optimal dithering of nonlinear quantizers.

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Section: ) Subtractive Dither With a 2nd Dtcmentioning

confidence: 99%

Dithering Concepts for Spur-Free Nonlinear DTC-Based Frequency Synthesizers

Preissl

Preyler

Springer

et al. 2021

IEEE Trans. Circuits Syst. I

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“…Radio frequency transmitters [28], [29] are widely used in telecommunication systems, garage door systems, electronic sound systems, televisions and video recorders. The buffered oscillator is an important part of the radio frequency transmitter.…”

Section: Buffered Oscillator a Crns Of Buffered Oscillatormentioning

confidence: 99%

“…The degradation reaction module shown in Fig. 4 can realize reactions (28), (29), (39), and (40). The annihilation reaction module shown in Fig.…”

Section: B Synchronization Of the Buffered Oscillatormentioning

confidence: 99%

Double Synchronization Based on DNA Strand Displacement Reaction

Sun

Zhang

et al. 2020

IEEE Access

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As an important part of biological computing, DNA strand displacement technology is used to construct complex biochemical circuits. Reversible molecular chemical reactions are basic chemical reactions. In this study, based on DNA strand displacement and reversible molecular chemical reactions, catalysis, degradation, annihilation and synchronization reaction modules were proposed. These chemical reaction modules were extended to the molecular level by DNA strand displacement. The function of these modules was confirmed, and the relationship between reaction rate and reaction concentration was also analyzed. Applying these modules to the six-input buffered oscillator, the input-output synchronization of the oscillator can be realized.

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“…The codewords are quantized according to the total number of unitaryweighted cells N with additional sign representing the MSB. most common measures include a high oversampling of the low-rate I/Q signals prior to the CORDIC, hole punching of the complex baseband signal as well as novel adaptive interpolation algorithms [26], [39]. For the presented approach, a high oversampling of the I/Q baseband signal has been chosen to achieve a low signal distortion after the ASRCs.…”

Section: A Sampling Rate Conversionmentioning

confidence: 99%

A Novel Digital-Intensive Hybrid Polar-I/Q RF Transmitter Architecture

Buckel

Preyler

Klinkan

et al. 2018

IEEE Trans. Circuits Syst. I

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A novel digital-intensive hybrid transmitter (TX) architecture is presented, combining conventional inphase and quadrature (I/Q) with constrained phase modulation. The proposed architecture utilizes an RF-DAC with phase modulated RF clock and adjusted I/Q components. By incorporating phase modulation the quadrature component is kept small while the inphase component approaches the complex signal envelope. Compared to a digital-quadrature TX architecture this results in a significantly reduced average and peak RF-DAC cell utilization. Therefore, the RF-DAC can be operated in less backoff at higher average output power and drain efficiency. The phase modulation is constrained in order to relax the phase modulators system requirements. Compared to a digital polar TX architecture utilizing an RF digital phase-locked loop with two-point phase modulation, this results in reduced frequency modulation and digital-controlled oscillator tuning range requirements. In addition, the design effort is further shifted from analog to digital domain in order to better exploit the benefits of CMOS technology scaling. Index Terms-Wireless communication, digital polar transmitter, digital quadrature transmitter, hybrid polar-I/Q transmitter, phase modulation, quadrature modulation, RF digital-to-analog converter (RF-DAC), RF digital power amplifier (RF-DPA), RF digital phase-locked loop (RF-DPLL). I. INTRODUCTION W IRELESS transceivers for multi-band, multi-standard mobile handset applications operating in the sub-6 GHz range are usually implemented in ultra-deep

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A Novel Interpolation Method for Polar Signals in Radio Frequency Transmitters

Cited by 4 publications

References 12 publications

Dithering Concepts for Spur-Free Nonlinear DTC-Based Frequency Synthesizers

Dithering Concepts for Spur-Free Nonlinear DTC-Based Frequency Synthesizers

Double Synchronization Based on DNA Strand Displacement Reaction

A Novel Digital-Intensive Hybrid Polar-I/Q RF Transmitter Architecture

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