Joint Wyner-Ziv/dirty-paper coding by modulo-lattice modulation

  • Authors:
  • Yuval Kochman;Ram Zamir

  • Affiliations:
  • Signals, Information and Algorithms Laboratory, Massachusetts Institute of Technology, Cambridge, MA and Department Electrical Engineering-Systems, Tel-Aviv University, Tel-Aviv, Israel;Department of Electrical Engineering-Systems, Tel-Aviv University, Tel-Aviv, Ramat-Aviv, Israel

  • Venue:
  • IEEE Transactions on Information Theory
  • Year:
  • 2009

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Abstract

The combination of source coding with decoder side information (the Wyner-Ziv problem) and channel coding with encoder side information (the Gel'fand-Pinsker problem) can be optimally solved using the separation principle. In this work, we show an alternative scheme for the quadratic-Gaussian case, which merges source and channel coding. This scheme achieves the optimal performance by applying a modulo-lattice modulation to the analog source. Thus, it saves the complexity of quantization and channel decoding, and remains with the task of "shaping" only. Furthermore, for high signal-to-noise ratio (SNR), the scheme approaches the optimal performance using an SNR-independent encoder, thus it proves for this special case the feasibility of universal joint source-channel coding.