@inproceedings{
 title = {ASMC-NOMA: Downlink Adaptive Subcarrier Spacing Multi-Carrier NOMA for 5G Time-Varying Channels},
 type = {inproceedings},
 year = {2018},
 id = {3b49cacb-cc59-31f2-921c-4cbbfe3efd19},
 created = {2021-09-27T02:37:46.389Z},
 file_attached = {false},
 profile_id = {28682fe8-11f5-38b5-8733-716ab483a4b8},
 last_modified = {2021-09-27T02:37:46.389Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {true},
 abstract = {Non-orthogonal multiple access (NOMA) scheme has been regarded as one of the promising solutions to realize a flexible and robust multiple access scheme in next generation wireless communication system. However, the inter-carrier interference caused by time-varying fading is not considered in conventional NOMA. In this paper, a novel multi-user access scheme, adaptive subcarrier-spacing multi-carrier non-orthogonal multiple access (ASMC- NOMA), is proposed to provide robust multi-user downlink transmission in time-varying channels and support user velocities up to 500 kmh. Based on the filtered-OFDM waveform, ASMC-NOMA allows flexible power-time- frequency three-dimensional resource allocation and subcarrier spacing adaptation according to the channel state and user velocities. With the user-specific adaption and coexistence of different parameters, ASMC-NOMA is able to repel the impact of high-range Doppler effects and control the signal-to-interference ratio for every downlink user. The pre-grouped resource adaptive allocation scheme is designed with the consideration of reducing the transmission overhead and receiver-end implementation complexity. Transceiver structure and signal model are discussed in detail. Theoretical analysis on the signal properties and numerical system-level simulation results prove that the proposed ASMC-NOMA effectively enhances the transmission robustness, reduces the transmission outage due to the high mobility of users, and provides increased transmission efficiency over conventional OFDM- based NOMA and multi-carrier orthogonal multiple access.},
 bibtype = {inproceedings},
 author = {Li, J. and Nie, S. and Han, C.},
 doi = {10.1109/GLOCOM.2018.8647783},
 booktitle = {2018 IEEE Global Communications Conference, GLOBECOM 2018 - Proceedings}
}

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In this paper, a novel multi-user access scheme, adaptive subcarrier-spacing multi-carrier non-orthogonal multiple access (ASMC- NOMA), is proposed to provide robust multi-user downlink transmission in time-varying channels and support user velocities up to 500 kmh. Based on the filtered-OFDM waveform, ASMC-NOMA allows flexible power-time- frequency three-dimensional resource allocation and subcarrier spacing adaptation according to the channel state and user velocities. With the user-specific adaption and coexistence of different parameters, ASMC-NOMA is able to repel the impact of high-range Doppler effects and control the signal-to-interference ratio for every downlink user. The pre-grouped resource adaptive allocation scheme is designed with the consideration of reducing the transmission overhead and receiver-end implementation complexity. Transceiver structure and signal model are discussed in detail. Theoretical analysis on the signal properties and numerical system-level simulation results prove that the proposed ASMC-NOMA effectively enhances the transmission robustness, reduces the transmission outage due to the high mobility of users, and provides increased transmission efficiency over conventional OFDM- based NOMA and multi-carrier orthogonal multiple access.","bibtype":"inproceedings","author":"Li, J. and Nie, S. and Han, C.","doi":"10.1109/GLOCOM.2018.8647783","booktitle":"2018 IEEE Global Communications Conference, GLOBECOM 2018 - Proceedings","bibtex":"@inproceedings{\n title = {ASMC-NOMA: Downlink Adaptive Subcarrier Spacing Multi-Carrier NOMA for 5G Time-Varying Channels},\n type = {inproceedings},\n year = {2018},\n id = {3b49cacb-cc59-31f2-921c-4cbbfe3efd19},\n created = {2021-09-27T02:37:46.389Z},\n file_attached = {false},\n profile_id = {28682fe8-11f5-38b5-8733-716ab483a4b8},\n last_modified = {2021-09-27T02:37:46.389Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {false},\n hidden = {false},\n private_publication = {true},\n abstract = {Non-orthogonal multiple access (NOMA) scheme has been regarded as one of the promising solutions to realize a flexible and robust multiple access scheme in next generation wireless communication system. 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