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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| Vydáno v: | IEEE International Conference on Communications in China workshops s. 70 - 74 |
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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. |
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| 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 |
| Author_xml | – sequence: 1 surname: Shancheng Zhao fullname: Shancheng Zhao organization: Dept. of ECE, Sun Yat-sen Univ., Guangzhou, China – sequence: 2 surname: Xiao Ma fullname: Xiao Ma organization: Dept. of ECE, Sun Yat-sen Univ., Guangzhou, China – sequence: 3 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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| 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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