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Nested lattice codes for the state-dependent gaussian interference channel with a common message

Ghasemi Goojani, S ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/IWCIT.2014.6842492
  3. Abstract:
  4. In this paper, we consider the generalized point-to-point Additive White Gaussian Noise (AWGN) channel with state: The State-Dependent Gaussian Interference Channel (SD-GIC) with a common message in which two senders transmit a common message to two receivers. Transmitter 1 knows only message μ1 while transmitter 2 in addition μ1 also knows the channel state sequence non-causally. In this paper, we consider the strong interference case where the channel state has unbounded variance. First, we show that a scheme based on Gelfand-Pinsker coding cannot achieve the capacity within a constant gap for channel gains smaller than unity. In contrast, we propose a lattice-based transmission scheme that can achieve the capacity region in the high SNR regime. Our proposed scheme can achieve the capacity region to within 0.5 bit for all values of channel parameters
  5. Keywords:
  6. Electric frequency control ; Information theory ; Signal interference ; Telecommunication ; Transmitters ; White noise ; Additive white gaussian noise channel ; Capacity regions ; Channel parameter ; Gaussian interference channels ; Nested lattice codes ; State-dependent ; Strong interference ; Transmission schemes ; Signal to noise ratio
  7. Source: IWCIT 2014 - Iran Workshop on Communication and Information Theory ; 7-8 May , 2014
  8. URL: http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6842492&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6842492