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A distortion outer bound for communicating correlated gaussian sources over a gaussian MAC

Setayesh, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/LCOMM.2017.2684124
  3. Abstract:
  4. In this letter, we consider two problems of sending a bivariate Gaussian source through a two-user Gaussian non-orthogonal multiple-access channel. We provide a new distortion outer bound for the considered joint source-channel coding problems, which significantly reduces the gap between inner and outer bounds of the distortion for correlation coefficients below a threshold. Furthermore, numerical results show, that under some conditions, our proposed outer bound matches with the inner bound obtained via the separate source-channel coding scheme, which proves the optimality of this scheme. © 1997-2012 IEEE
  5. Keywords:
  6. Correlated gaussian sources ; Distortion outer bound ; Multiple-access channel ; Codes (symbols) ; Communication channels (information theory) ; Gaussian distribution ; Bivariate gaussian ; Correlation coefficient ; Gaussian sources ; Joint source-channel coding ; Multiple access channels ; Numerical results ; Outer bounds ; Source channel coding ; Channel coding
  7. Source: IEEE Communications Letters ; Volume 21, Issue 7 , 2017 , Pages 1457-1460 ; 10897798 (ISSN)
  8. URL: https://ieeexplore.ieee.org/document/7880625