A Direct Digital Synthesis Transmitter for 5G Applications With Low-Resolution DACs
Journal
IEEE Transactions on Circuits and Systems II: Express Briefs
Date Issued
2024-01-01
Author(s)
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 paper 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.
Subjects
5G mobile communication | Digital-to-analog converter | direct digital synthesis | Frequency modulation | power amplifiers | Power harmonic filters | Quantization (signal) | Radio frequency | Radio transmitters | Signal resolution | transmitter
SDGs
Type
journal article