A Direct Digital Synthesis Transmitter for 5G Applications With Low-Resolution DACs

Conventional radio frequency (RF) transmitters frequently necessitate a pair of high-resolution, high-speed digital-to-analog converters (DACs) to ensure a specific level of linearity in wireless communication systems. Nevertheless, the high-resolution DACs escalate power consumption and area requir...

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Published inIEEE transactions on circuits and systems. II, Express briefs Vol. 71; no. 9; pp. 4166 - 4170
Main Authors Chang, Yu-Chen, Chen, You-Huei, Chen, Jau-Horng, Chen, Yi-Jan Emery
Format Journal Article
LanguageEnglish
Published New York IEEE 01.09.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
5G mobile communication
Digital to analog converters
Digital-to-analog converter
direct digital synthesis
Frequency modulation
High resolution
Nonlinearity
Power amplifiers
Power harmonic filters
Pulse duration modulation
Quantization (signal)
Radio frequency
Radio transmitters
Signal resolution
Synthesis
transmitter
Transmitters
Wireless communication systems
Online AccessGet full text
ISSN1549-7747
1558-3791
DOI10.1109/TCSII.2024.3381527

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Abstract Conventional radio frequency (RF) transmitters frequently necessitate a pair of high-resolution, high-speed digital-to-analog converters (DACs) to ensure a specific level of linearity in wireless communication systems. Nevertheless, the high-resolution DACs escalate power consumption and area requirements and intensify the need for heat dissipation mechanisms. This brief presents a direct digital synthesis (DDS) transmitter using a pair of RF DACs with just 2 bits of resolution. The DDS transmitter, which uses a proposed digital pulse-width modulation signal with dithering, is resistant to power amplifier (PA) nonlinearity. Tested with 5G uplink signals and a pair of nonlinear PAs at 836.5 MHz, the transmitter could pass the stringent spectral requirements for 5G applications without using any digital predistortion or calibration techniques.
AbstractList Conventional radio frequency (RF) transmitters frequently necessitate a pair of high-resolution, high-speed digital-to-analog converters (DACs) to ensure a specific level of linearity in wireless communication systems. Nevertheless, the high-resolution DACs escalate power consumption and area requirements and intensify the need for heat dissipation mechanisms. This brief presents a direct digital synthesis (DDS) transmitter using a pair of RF DACs with just 2 bits of resolution. The DDS transmitter, which uses a proposed digital pulse-width modulation signal with dithering, is resistant to power amplifier (PA) nonlinearity. Tested with 5G uplink signals and a pair of nonlinear PAs at 836.5 MHz, the transmitter could pass the stringent spectral requirements for 5G applications without using any digital predistortion or calibration techniques.
Author Chen, Jau-Horng
Chang, Yu-Chen
Chen, Yi-Jan Emery
Chen, You-Huei
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SubjectTerms 5G mobile communication
Digital to analog converters
Digital-to-analog converter
direct digital synthesis
Frequency modulation
High resolution
Nonlinearity
Power amplifiers
Power harmonic filters
Pulse duration modulation
Quantization (signal)
Radio frequency
Radio transmitters
Signal resolution
Synthesis
transmitter
Transmitters
Wireless communication systems
Title A Direct Digital Synthesis Transmitter for 5G Applications With Low-Resolution DACs
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