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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Vydané v:IEEE International Conference on Communications in China workshops s. 70 - 74
Hlavní autori: Shancheng Zhao, Xiao Ma, Baoming Bai
Médium: Konferenčný príspevok..
Jazyk:English
Vydavateľské údaje: IEEE 01.10.2014
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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
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  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
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Title Design of LDPC codes for binary-input Gaussian interference channels
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