Efficient Raptor Coded Cooperation Scheme via QC-LDPC Pre-coding

BAO Jianrong; HE Dan; XU Xiaorong; JIANG Bin

doi:10.11999/JEIT160400

Volume 39 Issue 3

Mar. 2017

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Article Navigation > Journal of Electronics & Information Technology > 2017 > 39(3): 554-560

BAO Jianrong, HE Dan, XU Xiaorong, JIANG Bin. Efficient Raptor Coded Cooperation Scheme via QC-LDPC Pre-coding[J]. Journal of Electronics & Information Technology, 2017, 39(3): 554-560. doi: 10.11999/JEIT160400

Citation:

BAO Jianrong, HE Dan, XU Xiaorong, JIANG Bin. Efficient Raptor Coded Cooperation Scheme via QC-LDPC Pre-coding[J]. Journal of Electronics & Information Technology, 2017, 39(3): 554-560. doi: 10.11999/JEIT160400

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Efficient Raptor Coded Cooperation Scheme via QC-LDPC Pre-coding

doi: 10.11999/JEIT160400

1.
2.
(School of Telecommunication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)

Funds:

Zhejiang Provincial National Natural Science Foundation (LZ14F010003, LY15F010008), The National Natural Science Foundation of China (61471152), The Open Research Fund of National Mobile Communications Research Laboratory Southeast University (2014D02), Zhejiang Provincial Science and Technology Plan Project (2015C31103)

Received Date: 2016-04-22
Rev Recd Date: 2016-09-02
Publish Date: 2017-03-19

Abstract

Abstract

Traditionally, the cooperative communications usually uses Decode-and-Forward (DF) strategy. However, there is easily error propagation phenomenon by the strategy, when the quality of the communication link between source and relay is poor. To solve the problem, a novel Raptor coded cooperation scheme, which can be used in the Coded Cooperation (CC) strategy, is proposed to achieve rather high coding gains and full diversity gains in high Signal-to-Noise Ratio (SNR) regime. In this scheme, different Raptor codes are employed at the source and relay nodes, so the codeword at each node is independent and unequal. Meanwhile, the codeword at relay node is the parity check section of the codeword at the source node. Therefore, after receiving the data transmitted from different independent links, the destination node tries to decode them jointly by the intrinsic relationship among them, to obtain additionally spatial diversity gains in transmission. In addition, in order to reduce the complexity of Raptor encoding and decoding, the Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) codes are constructed by integer sequence and employed as the pre-coding. Simulations indicate that the proposed Raptor CC scheme achieves 2 dB and 1 dB performance gains compared with those of the traditional DF based one and a scheme with the combination of a Raptor code and a Distributed Space-Time Block Code (DSTBC), respectively, at Bit Error Rate (BER) of10-4 . Moreover, the performance improves about 2 dB and 7 dB at the outage of10-2 , when compared with those of the CC strategy and DF strategy, respectively.
- Raptor coded cooperation,
- Bit Error Ratio (BER),
- Outage probability,
- Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) code,
- Integer sequence

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References(27)

References

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