Design of LDPC codes for binary-input Gaussian interference channels

Due to the existence of multiuser interference, codes optimized for point-to-point links may be unsuitable for multiuser networks. In this paper, we are concerned with the design of low-density parity-check (LDPC) codes for binary-input Gaussian interference channels (GIFC). We utilize a Monte-Carlo...

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Published in:IEEE International Conference on Communications in China workshops pp. 70 - 74
Main Authors: Shancheng Zhao, Xiao Ma, Baoming Bai
Format: Conference Proceeding
Language:English
Published: IEEE 01.10.2014
Subjects:
Algorithm design and analysis
AWGN channels
Decoding
Gaussian interference channels
Iterative decoding
joint decoding algorithm
Joints
LDPC codes
multiuser systems
Optimization
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ISSN:2377-8644
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Abstract Due to the existence of multiuser interference, codes optimized for point-to-point links may be unsuitable for multiuser networks. In this paper, we are concerned with the design of low-density parity-check (LDPC) codes for binary-input Gaussian interference channels (GIFC). We utilize a Monte-Carlo approach based on the downhill-simplex algorithm to obtain good LDPC degree distributions for GIFC. Simulation results show that the constructed codes perform better than codes optimized only for point-to-point links. For symmetric GIFC with coefficient h 2 = 0.75, coding gain about 0.6 dB is obtained. These results indicate that, as opposed to using off-the-shell codes designed for point-to-point links, new codes should be designed in multiuser networks.
AbstractList Due to the existence of multiuser interference, codes optimized for point-to-point links may be unsuitable for multiuser networks. In this paper, we are concerned with the design of low-density parity-check (LDPC) codes for binary-input Gaussian interference channels (GIFC). We utilize a Monte-Carlo approach based on the downhill-simplex algorithm to obtain good LDPC degree distributions for GIFC. Simulation results show that the constructed codes perform better than codes optimized only for point-to-point links. For symmetric GIFC with coefficient h 2 = 0.75, coding gain about 0.6 dB is obtained. These results indicate that, as opposed to using off-the-shell codes designed for point-to-point links, new codes should be designed in multiuser networks.
Author Shancheng Zhao
Xiao Ma
Baoming Bai
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  surname: Shancheng Zhao
  fullname: Shancheng Zhao
  organization: Dept. of ECE, Sun Yat-sen Univ., Guangzhou, China
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  surname: Xiao Ma
  fullname: Xiao Ma
  organization: Dept. of ECE, Sun Yat-sen Univ., Guangzhou, China
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  surname: Baoming Bai
  fullname: Baoming Bai
  organization: State Key Lab. of ISN, Xidian Univ., Xi'an, China
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Snippet Due to the existence of multiuser interference, codes optimized for point-to-point links may be unsuitable for multiuser networks. In this paper, we are...
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StartPage 70
SubjectTerms Algorithm design and analysis
AWGN channels
Decoding
Gaussian interference channels
Iterative decoding
joint decoding algorithm
Joints
LDPC codes
multiuser systems
Optimization
Tanner graph
Title Design of LDPC codes for binary-input Gaussian interference channels
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