Chen, You HueiYou HueiChenLin, Shu ChenShu ChenLinHung, Jui HsinJui HsinHungYang, Hao ShunHao ShunYangJAU-HORNG CHENYI-JAN EMERY CHEN2023-04-202023-04-202022-11-0115311309https://scholars.lib.ntu.edu.tw/handle/123456789/630397This letter presents a low-resolution multiband transmitter architecture using direct digital synthesis (DDS) with dithering. Modern modulated signals constructed by a low-resolution digital-to-analog converter (DAC) suffer from quantization errors and distortions. The proposed technique reduces the quantization problems with the use of a proper oversampling ratio (OSR) and the dithering technique. This technique has lower cost and lower complexity compared to conventional transmitters while maintaining linearity performance. A 50-MHz 5G NR 256-quadratic-amplitude modulation (QAM) signal is used for concept validation at bands n1, n40, and n50. The proposed work achieved the adjacent channel leakage ratio (ACLR) and error vector magnitude (EVM) requirements of under-30 dBc and 3.5%, respectively. A single 3-bit 10-GS/s radio frequency (RF) DAC is used where the performance is similar to a conventional transmitter using a pair of 5-bit baseband in-phase and quadrature (IQ) DACs.Digital-to-analog converter (DAC) | dithering | quantization noisejournal article10.1109/LMWC.2022.31826622-s2.0-85133757514WOS:000821544900001https://api.elsevier.com/content/abstract/scopus_id/85133757514