Backscatter-NOMA Enabled Hybrid Multicast-Unicast Cooperative Transmission Scheme

KUO Yonghong; XUE Yanwen; LÜ Lu; HE Bingtao; CHEN Jian

doi:10.11999/JEIT230672

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KUO Yonghong, XUE Yanwen, LÜ Lu, HE Bingtao, CHEN Jian. Backscatter-NOMA Enabled Hybrid Multicast-Unicast Cooperative Transmission Scheme[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT230672

Citation:

KUO Yonghong, XUE Yanwen, LÜ Lu, HE Bingtao, CHEN Jian. Backscatter-NOMA Enabled Hybrid Multicast-Unicast Cooperative Transmission Scheme[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT230672

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Backscatter-NOMA Enabled Hybrid Multicast-Unicast Cooperative Transmission Scheme

doi: 10.11999/JEIT230672

School of Telecommunications Engineering, Xidian University, Xi’an 710071, China

Funds: The National Natural Science Foundation of China (62271386, 61971320, 62201421), China Postdoctoral Science Foundation Project (BX20190264, 2019M650258), The Key R&D Program Project of Shaanxi Province (2023-YBGY-041), The Natural Science Basic Research Plan of Shaanxi Province (2021JQ-206), Guangdong Basic and Applied Basic Research Foundation (2020A1515110084)

Received Date: 2023-07-07
Rev Recd Date: 2024-03-25

Available Online: 2024-04-08

Abstract

Abstract

In order to address the low spectral efficiency and inefficient link utilization problem in cooperative relay communication system, a Backscatter-NOMA enabled hybrid multicast-unicast cooperative transmission scheme is proposed for the scenario of coexistence of multicast and unicast services. A multicast user is opportunistically selected as a cooperative node, which used a part of the power of the received signal for its own decoding, and backscatter the residual power to enhance the reception quality of other users. To improve system performance, the minimum achievable rate for unicast users is maximized by jointly optimizing the base station power allocation coefficients, cooperative user backscatter coefficient and cooperative node selection variable, while guaranteeing the quality of service for multicast. To solve the above highly non-convex joint optimization problem, a cooperative user selection criterion was designed and an iterative algorithm was proposed to obtain the optimal solution to the original problem. The simulation results verify the fast convergence of the proposed iterative algorithm, which can improve the minimum achievable rate of unicast users by 11.5% compared to the non-cooperative transmission scheme, and effectively ensure the quality of multi-service.
- Backscatter communications,
- Non-Orthogonal Multiple Access (NOMA),
- Cooperative unicast-multicast,
- User selection

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References(26)

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