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State-dependent Gaussian Z-interference channel: New results

Ghasemi Goojani, S ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. A class of Gaussian Z-interference channels with state is investigated in the regime of high state power in which two transmitters communicate two independent messages through a 'dirty' Z-interference channel. Transmitter 1 (primary user) interferes with receiver 2 while transmitter 2 (secondary user) does not interfere with receiver 1. In addition, receiver 2 suffers from a random state sequence which is non-causally known only at transmitter 1. For this setup, which is also investigated by Duan et al. in [1], first we characterize the capacity region for the deterministic case and then by the obtained insight from analyzing the deterministic case, we establish sufficient conditions under which lattice-based transmission schemes meet the capacity region outer bound. In general, we show that lattice codes can achieve the capacity region to within 1over2 log (3) ≈ 0.79 bit of the outer bound for all values of channel parameters
  4. Keywords:
  5. Information theory ; Transmitters ; Capacity regions ; Channel parameter ; Interference channels ; Lattice codes ; Primary Users ; Secondary users ; State-dependent ; Transmission schemes ; Signal interference
  6. Source: Proceedings of 2014 International Symposium on Information Theory and Its Applications, ISITA 2014 ; 26- 29 October , 2014 , pp. 468-472 ; ISBN: 9784885522925
  7. URL: http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6979887&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6979887