@inproceedings{d8a5280a-93d9-4f17-92b1-e9221c685f5a,
  abstract     = {{We here present an RF-DAC-based PD featuring IQ expansion, a linearization concept using segmented non-linear RF-DACs combined with increased expansion in the IQ direction. The proposed predistorter, realized within the RF-DACs themselves, is very hardware efficient, only requiring a small amount of additional hardware compared to a conventional RF-DAC. The proposed RF-DAC-based PD, realized in a 22nm CMOS technology, is used to linearize a PA integrated on the same chip. With IQ expansion, we measure a peak compression ripple of ±0.2dB across the full range with a peak output power <2.3dB below the PA Psat. Modulated measurements with up to 4GSym/s 64QAM SC signals show an EVM <4.05% and ACPR <−30.1dBc, achieving an EVM improvement of >0.3percent unit.}},
  author       = {{Åberg, Victor and Zhou, Han}},
  booktitle    = {{IEEE International Symposium on Circuits and Systems (ISCAS)}},
  isbn         = {{979-8-3315-7769-8}},
  language     = {{eng}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  title        = {{Wideband Cartesian RF-DAC-based predistorter using nonlinear RF-DACs and IQ expansion}},
  url          = {{http://dx.doi.org/10.1109/ISCAS66217.2026.11562181}},
  doi          = {{10.1109/ISCAS66217.2026.11562181}},
  year         = {{2026}},
}