Linear superposition coding for the Gaussian broadcast channel with quantized feedback

@article{Farthofer2016LinearSC,
  title={Linear superposition coding for the Gaussian broadcast channel with quantized feedback},
  author={Stefan Farthofer and Gerald Matz},
  journal={2016 International Symposium on Information Theory and Its Applications (ISITA)},
  year={2016},
  pages={106-110}
}
We propose a linear transceiver scheme for the symmetric two-user broadcast channel with additive Gaussian noise and quantized feedback. The quantized feedback link is modeled as an information bottleneck subject to a rate constraint. We introduce a superposition scheme that splits the transmit power between an Ozarow-like linear-feedback code and a conventional code that ignores the feedback. The recently established MAC-BC duality with linear-feedback coding is key as it allows us to extend… CONTINUE READING

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