Joint Beamforming and Power Allocation for Satellite-Terrestrial Integrated Networks With Non-Orthogonal Multiple Access

By Zhi Lin, Min Lin, Jun-Bo Wang, Tomaso de Cola, Jiangzhou Wang. IEEE Journal on Selected Topics in Signal Processing, 2019

356 citations recorded by the source corpus.

In this paper, we propose a joint optimization design for a non-orthogonal multiple access (NOMA)-based satellite-terrestrial integrated network (STIN), where a satellite multicast communication network shares the millimeter wave spectrum with a cellular network employing NOMA technology. By assuming that the satellite uses multibeam antenna array and the base station employs uniform planar array, we first formulate a constrained optimization problem to maximize the sum rate of the STIN while satisfying the constraint of per-antenna transmit power and quality-of-service requirements of both satellite and cellular users. Since the formulated optimization problem is NP-hard and mathematically intractable, we develop a novel user pairing scheme so that more than two users can be grouped in a cluster to exploit the NOMA technique. Based on the user clustering, we further propose to transform the non-convex problem into an equivalent convex one, and present an iterative penalty function-based beamforming (BF) scheme to obtain the BF weight vectors and power coefficients with fast convergence. Simulation results confirm the effectiveness and superiority of the proposed approach in comparison with the existing works.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/7104f23d30eca05ff29aab42a3e4f9bdb1aca4f0

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Citations in the corpus

A Survey of Rate-Optimal Power Domain NOMA With Enabling Technologies of Future Wireless Networks (2019, background): “On the other hand, in [286], the satellite uses multicast communication to serve the earth BSs, which in turn serve individual users through NOMA.”
Satellite Communications in the New Space Era: A Survey and Future Challenges (2020, methodology): “In [138], joint beamforming and power allocation for NOMA-based satellite-terrestrial networks were studied.”
A Survey on Nongeostationary Satellite Systems: The Communication Perspective (2021, background): “Furthermore, NOMA scheme can be incorporated in the NGSO multi-beam satellite architecture to design efficient transmission strategies that aim at increasing radio access flexibility and capacity [100].”
Integrated Satellite-Terrestrial Networks Toward 6G: Architectures, Applications, and Challenges (2022, methodology): “In [186], a joint beamforming and power allocation algo-rithm was proposed for the integrated satellite-terrestrial network while sharing the same mmWave frequency band.”