Random Beam-Based Non-Orthogonal Multiple Access for Low Latency K-User MISO Broadcast Channels
In this paper, we propose random beam-based non-orthogonal multiple access (NOMA) for low latency multiple-input single-output (MISO) broadcast channels, where there is a target signal-to-interference-plus-noise power ratio (SINR) for each user. In our system model, there is a multi-antenna transmit...
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MDPI AG
2021-06-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/13/4373 |
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| author | Jung Hoon Lee Yunjoo Kim Jong Yeol Ryu |
| author_facet | Jung Hoon Lee Yunjoo Kim Jong Yeol Ryu |
| author_sort | Jung Hoon Lee |
| collection | DOAJ |
| description | In this paper, we propose random beam-based non-orthogonal multiple access (NOMA) for low latency multiple-input single-output (MISO) broadcast channels, where there is a target signal-to-interference-plus-noise power ratio (SINR) for each user. In our system model, there is a multi-antenna transmitter with its own single antenna users, and the transmitter selects and serves some of them. For low latency, the transmitter exploits random beams, which can reduce the feedback overhead for the channel acquisition, and each beam can support more than a single user with NOMA. In our proposed random beam-based NOMA, each user feeds a selected beam index, the corresponding SINR, and the channel gain, so it feeds one more scalar value compared to the conventional random beamforming. By allocating the same powers across the beams, the transmitter independently selects NOMA users for each beam, so it can also reduce the computational complexity. We optimize our proposed scheme finding the optimal user grouping and the optimal power allocation. The numerical results show that our proposed scheme outperforms the conventional random beamforming by supporting more users for each beam. |
| first_indexed | 2024-03-10T10:01:57Z |
| format | Article |
| id | doaj.art-bee4ed192d734d26aede96b41b7ff6a4 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T10:01:57Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-bee4ed192d734d26aede96b41b7ff6a42023-11-22T01:50:38ZengMDPI AGSensors1424-82202021-06-012113437310.3390/s21134373Random Beam-Based Non-Orthogonal Multiple Access for Low Latency K-User MISO Broadcast ChannelsJung Hoon Lee0Yunjoo Kim1Jong Yeol Ryu2Department of Electronics Engineering and Applied Communications Research Center, Hankuk University of Foreign Studies, Yongin 17035, KoreaTelecommunications & Media Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon 34129, KoreaDepartment of Information and Communications Engineering, Gyeongsang National University, Tongyeong 53064, KoreaIn this paper, we propose random beam-based non-orthogonal multiple access (NOMA) for low latency multiple-input single-output (MISO) broadcast channels, where there is a target signal-to-interference-plus-noise power ratio (SINR) for each user. In our system model, there is a multi-antenna transmitter with its own single antenna users, and the transmitter selects and serves some of them. For low latency, the transmitter exploits random beams, which can reduce the feedback overhead for the channel acquisition, and each beam can support more than a single user with NOMA. In our proposed random beam-based NOMA, each user feeds a selected beam index, the corresponding SINR, and the channel gain, so it feeds one more scalar value compared to the conventional random beamforming. By allocating the same powers across the beams, the transmitter independently selects NOMA users for each beam, so it can also reduce the computational complexity. We optimize our proposed scheme finding the optimal user grouping and the optimal power allocation. The numerical results show that our proposed scheme outperforms the conventional random beamforming by supporting more users for each beam.https://www.mdpi.com/1424-8220/21/13/4373random beamformingnon-orthogonal multiple access (NOMA)multiple-input single-output (MISO)broadcast channels (BC) |
| spellingShingle | Jung Hoon Lee Yunjoo Kim Jong Yeol Ryu Random Beam-Based Non-Orthogonal Multiple Access for Low Latency K-User MISO Broadcast Channels Sensors random beamforming non-orthogonal multiple access (NOMA) multiple-input single-output (MISO) broadcast channels (BC) |
| title | Random Beam-Based Non-Orthogonal Multiple Access for Low Latency K-User MISO Broadcast Channels |
| title_full | Random Beam-Based Non-Orthogonal Multiple Access for Low Latency K-User MISO Broadcast Channels |
| title_fullStr | Random Beam-Based Non-Orthogonal Multiple Access for Low Latency K-User MISO Broadcast Channels |
| title_full_unstemmed | Random Beam-Based Non-Orthogonal Multiple Access for Low Latency K-User MISO Broadcast Channels |
| title_short | Random Beam-Based Non-Orthogonal Multiple Access for Low Latency K-User MISO Broadcast Channels |
| title_sort | random beam based non orthogonal multiple access for low latency k user miso broadcast channels |
| topic | random beamforming non-orthogonal multiple access (NOMA) multiple-input single-output (MISO) broadcast channels (BC) |
| url | https://www.mdpi.com/1424-8220/21/13/4373 |
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