All-Digital LTE SAW-Less Transmitter With DSP-Based Programming of RX-Band Noise

@article{Roverato2017AllDigitalLS,
  title={All-Digital LTE SAW-Less Transmitter With DSP-Based Programming of RX-Band Noise},
  author={Enrico Roverato and Marko Kosunen and Koen Cornelissens and Sofia Vatti and Paul Stynen and Kaoutar Bertrand and Teuvo Korhonen and Hans Samsom and Patrick Vandenameele and Jussi Ryyn{\"a}nen},
  journal={IEEE Journal of Solid-State Circuits},
  year={2017},
  volume={52},
  pages={3434-3445}
}
We present the first all-digital LTE transmitter (TX) using programmable digital attenuation of receive band (RX-band) noise. The system is architectured to fully exploit the speed and low cost of DSP logic in deep-submicrometer CMOS processes, without increasing at all the design effort of the RF circuitry. To achieve operation without surface acoustic wave filter, the TX uses digital bandpass delta–sigma modulation and mismatch-shaping to attenuate the DAC noise at a programmable duplex… CONTINUE READING

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