Abstract | ||
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Multicast beamforming is known to improve spectral efficiency. However, its benefits and challenges for hybrid precoders design in millimeter-wave (mmWave) systems remain understudied. To this end, this paper investigates the first joint design of hybrid transmit precoders (with an arbitrary number of finite-resolution phase shifts) and receive combiners for mmWave multi-group multicasting. Our proposed design leverages semidefinite relaxation (SDR), alternating optimization and Cholesky matrix factorization to sequentially optimize the digital/analog precoders at the transmitter and the combiners at each receiver. By considering receivers with multiple-antenna architecture, our design remarkably improves the overall system performance. Specifically, with only two receive antennas the average transmit power per received message improves by 16.8% while the successful information reception is boosted by 60%. We demonstrate by means of extensive simulations that our hybrid precoder design performs very close to its fully-digital counterpart even under challenging scenarios (i.e., when co-located users belong to distinct multicast groups). |
Year | DOI | Venue |
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2019 | 10.1109/GLOBECOM38437.2019.9014050 | IEEE Global Communications Conference |
Keywords | DocType | ISSN |
hybrid precoding,millimeter-wave,multicast,semidefinite relaxation,alternating optimization | Conference | 2334-0983 |
Citations | PageRank | References |
0 | 0.34 | 0 |
Authors | ||
3 |
Name | Order | Citations | PageRank |
---|---|---|---|
Luis F. Abanto-Leon | 1 | 0 | 0.68 |
Matthias Hollick | 2 | 750 | 97.29 |
Gek Hong Sim | 3 | 38 | 6.93 |