Transmitter architecture using digital generation of RF signals

@article{Rode2003TransmitterAU,
  title={Transmitter architecture using digital generation of RF signals},
  author={Jeremy Rode and Jeffrey Hinrichs and Peter M. Asbeck},
  journal={Radio and Wireless Conference, 2003. RAWCON '03. Proceedings},
  year={2003},
  pages={245-248}
}
This paper describes architecture for a CDMA RF transmitter implemented in digital CMOS. The functions of up-conversion and filtering are carried out in the digital domain. A band-pass delta-sigma modulator is used to produce a one-bit output containing the desired analog signal, which is then fed to switching-mode power amplifier. Issues for the digital logic implementation to facilitate proper modulator operation at the required high clock rates (>3.3 GHz) are discussed in detail. 

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