Clipping Noise-Aided Message Passing Algorithm for SCMA-OFDM System
Sparse code multiple access combined with orthogonal frequency division multiplexing (SCMA-OFDM) is a promising wireless air-interface technology for fifth generation (5G) networks to support massive connections. The existing problem for SCMA-OFDM system is that the peak-to-average power ratio (PAPR...
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| Veröffentlicht in: | IEEE communications letters Jg. 22; H. 10; S. 2156 - 2159 |
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| Hauptverfasser: | , , , |
| Format: | Journal Article |
| Sprache: | Englisch |
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New York
IEEE
01.10.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
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| ISSN: | 1089-7798, 1558-2558 |
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| Abstract | Sparse code multiple access combined with orthogonal frequency division multiplexing (SCMA-OFDM) is a promising wireless air-interface technology for fifth generation (5G) networks to support massive connections. The existing problem for SCMA-OFDM system is that the peak-to-average power ratio (PAPR) is unbearable high. The clipping method is often adopted to reduce the PAPR. However, the clipping brings extra noise to the SCMA-OFDM system. Due to the conventional message passing algorithm (C-MPA) didn't consider the clipping noise, it will cause the C-MPA decoding to be inaccurate and degrade the bit error rate performance. To tackle this issue, a novel clipping noise-aided MPA scheme, named CNA-MPA, which take both the additive white Gaussian noise (AWGN) and the clipping noise into consideration for decoding accurately is proposed. Simulation results show that the analysis of the clipping noise is accurate and the proposed CNA-MPA scheme leveraging both the AWGN and clipping noise can handle the phenomenon of the performance deterioration occurred in the C-MPA scheme at high E b /N 0 regime. |
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| AbstractList | Sparse code multiple access combined with orthogonal frequency division multiplexing (SCMA-OFDM) is a promising wireless air-interface technology for fifth generation (5G) networks to support massive connections. The existing problem for SCMA-OFDM system is that the peak-to-average power ratio (PAPR) is unbearable high. The clipping method is often adopted to reduce the PAPR. However, the clipping brings extra noise to the SCMA-OFDM system. Due to the conventional message passing algorithm (C-MPA) didn’t consider the clipping noise, it will cause the C-MPA decoding to be inaccurate and degrade the bit error rate performance. To tackle this issue, a novel clipping noise-aided MPA scheme, named CNA-MPA, which take both the additive white Gaussian noise (AWGN) and the clipping noise into consideration for decoding accurately is proposed. Simulation results show that the analysis of the clipping noise is accurate and the proposed CNA-MPA scheme leveraging both the AWGN and clipping noise can handle the phenomenon of the performance deterioration occurred in the C-MPA scheme at high Eb/N0 regime. Sparse code multiple access combined with orthogonal frequency division multiplexing (SCMA-OFDM) is a promising wireless air-interface technology for fifth generation (5G) networks to support massive connections. The existing problem for SCMA-OFDM system is that the peak-to-average power ratio (PAPR) is unbearable high. The clipping method is often adopted to reduce the PAPR. However, the clipping brings extra noise to the SCMA-OFDM system. Due to the conventional message passing algorithm (C-MPA) didn't consider the clipping noise, it will cause the C-MPA decoding to be inaccurate and degrade the bit error rate performance. To tackle this issue, a novel clipping noise-aided MPA scheme, named CNA-MPA, which take both the additive white Gaussian noise (AWGN) and the clipping noise into consideration for decoding accurately is proposed. Simulation results show that the analysis of the clipping noise is accurate and the proposed CNA-MPA scheme leveraging both the AWGN and clipping noise can handle the phenomenon of the performance deterioration occurred in the C-MPA scheme at high E b /N 0 regime. |
| Author | Ma, Xinying Lin, Xubin Yang, Lin Song, Kun |
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| Cites_doi | 10.1109/TBC.2017.2669641 10.1109/MCOM.2015.7263349 10.1109/TSP.2007.909320 |
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| Copyright | Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2018 |
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| SubjectTerms | Algorithms AWGN Bit error rate clipping noise Codes Computer simulation Decoding Fiber optic networks Mathematical model Message passing message passing algorithm (MPA) Noise Orthogonal Frequency Division Multiplexing orthogonal frequency division multiplexing (OFDM) Peak to average power ratio peak-to-average power ratio (PAPR) Performance degradation Random noise Simulation Sparse code multiple access (SCMA) Wireless networks |
| Title | Clipping Noise-Aided Message Passing Algorithm for SCMA-OFDM System |
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