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Title: Precoder Design For Multi-Group Multicasting With a Common Message
Authors: Yalçın, Ahmet Zahid
Yüksel, Ayşe Melda
Keywords: Common and private data transmission
multicast transmission
multiple input multiple output
physical layer precoding
superposition coding
Issue Date: Oct-2019
Publisher: Institute of Electrical and Electronics Engineers Inc.
Source: Yalcin, A. Z., Yuksel, M. (2019). Precoder design for multi-group multicasting with a common message. IEEE Transactions on Communications, 67(10), 7302-7315.
Abstract: This paper considers precoding for multi-group multicasting with a common message. The multiple antenna base station communicates with K clusters, each with L users. There is a common message destined to all users and a private multicast message for each cluster. We study the weighted sum rate (WSR) maximization problem for two different schemes: 1) the base station transmits the superposition of common and multicast messages and 2) the base station concatenates the multicast message vector with the common message. We also formulate a second problem, weighted minimum mean square error (WMMSE) minimization, and prove that WSR maximization and WMMSE minimization are equivalent at the optimal solution. Inspired by the WMMSE problem, we suggest a suboptimal algorithm, based on alternating optimization. We apply this algorithm to the two transmission schemes and understand that there is a fundamental difference between the two. We compare the results with maximal ratio transmission (MRT) and zero-forcing (ZF) precoding and investigate the effects of the number of base station antennas, the number of groups, and the number of users in a group. Finally, we study imperfect successive interference cancellation (SIC) at the receivers and show that the first transmission scheme is more robust.
ISSN: 1558-0857
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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