DocumentCode :
164396
Title :
Nested lattice codes for the state-dependent Gaussian interference channel with a common message
Author :
Ghasemi-Goojani, Shahab ; Behroozi, Hamid
Author_Institution :
Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran
fYear :
2014
fDate :
7-8 May 2014
Firstpage :
1
Lastpage :
6
Abstract :
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 W1 while transmitter 2 in addition W1 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.
Keywords :
AWGN channels; encoding; radio transmitters; radiofrequency interference; AWGN channel; Gelfand-Pinsker coding; SD-GIC; SNR regime; capacity region; channel parameters; channel state sequence; generalized point-topoint Additive White Gaussian Noise; lattice-based transmission scheme; nested lattice codes; state-dependent Gaussian interference channel; unbounded variance; Decoding; Encoding; Interference channels; Lattices; Receivers; Transmitters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communication and Information Theory (IWCIT), 2014 Iran Workshop on
Conference_Location :
Tehran
Print_ISBN :
978-1-4799-4878-9
Type :
conf
DOI :
10.1109/IWCIT.2014.6842492
Filename :
6842492
Link To Document :
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