Results 31 to 40 of about 604 (109)
Max-Min Fair Beamforming for Cooperative Multigroup Multicasting With Rate-Splitting [PDF]
IEEE Transactions on Wireless Communications, 2021 The demand of massive access to the same multimedia content at the same time is one major challenge for next-generation cellular networks in densely-packed urban areas. The content-aware multicast transmission strategies provide promising solutions to such use cases involving many mobile users trying to fetch the same data.
Ahmet Zahid Yalcin, Yavuz Yapici
openaire +3 more sources
Multi-cell interference coordination for multigroup multicast transmission [PDF]
2017 European Conference on Networks and Communications (EuCNC), 2017 Multicasting has become a particularly important technique in the context of cache-enabled cloud radio access networks proposed for 5G systems, where it can be used to transmit common information to multiple users to improve both spectral and energy efficiency.
Tervo, O. (Oskari) +4 more
openaire +2 more sources
Low Complexity Algorithms for Robust Multigroup Multicast Beamforming [PDF]
IEEE Communications Letters, 2019 Existing methods for robust multigroup multicast beamforming obtain feasible points using semidefinite relaxation (SDR) and Gaussian randomization, and have high computational complexity. In this letter, we consider the robust multigroup multicast beamforming design to minimize the sum power (SP) or per-antenna power (PAP) under the signal-to ...
Guangda Zang +6 more
openaire +2 more sources
Two-level frame precoding with non-cooperative gateways
EURASIP Journal on Wireless Communications and Networking, 2020 This paper considers the pre-processing design to mitigate the multibeam interference in the downlink of a high-throughput satellite, with a common precoder for several users sharing the same frame, and limited adaptation capabilities on-board the ...
Tomás Ramírez +2 more
doaj +1 more source
Frame Based Precoding in Satellite Communications: A Multicast Approach [PDF]
, 2014 In the present work, a multibeam satellite that employs aggressive frequency reuse towards increasing the offered throughput is considered. Focusing on the forward link, the goal is to employ multi-antenna signal processing techniques, namely linear ...
Chatzinotas, Symeon +2 more
core +2 more sources
Joint V2V‐Assisted Clustering, Caching, and Multicast Beamforming in Vehicular Edge Networks
Wireless Communications and Mobile Computing, Volume 2020, Issue 1, 2020., 2020 As an emerging type of Internet of Things (IoT), Internet of Vehicles (IoV) denotes the vehicle network capable of supporting diverse types of intelligent services and has attracted great attention in the 5G era. In this study, we consider the multimedia content caching with multicast beamforming in IoV‐based vehicular edge networks.
Kan Wang +4 more
wiley +1 more source
Robust Synthesis Algorithm for Directional Modulation Signal with Array Manifold Vectors Uncertainty
International Journal of Antennas and Propagation, Volume 2020, Issue 1, 2020., 2020 Directional modulation (DM) has become a new research hotspot of physical layer security (PLS) communication at the transmitter side. In this paper, we propose a robust synthesis algorithm for DM signal under the condition of the array manifold vectors perturbation.
Tao Hong, Ana Alejos
wiley +1 more source
Robust rank-two beamforming for multicell multigroup multicast
2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2015 In practical cellular communication systems, perfect channel state information is not available at the base stations. Assuming that the channel uncertainty is bounded within a known spherical region, the authors consider in this study robust rank‐two multicast beamforming for multiple groups of users in multicell systems.
Binyue Liu, Yong Cheng, Qiaoqiao Zhou
openaire +1 more source
Multicast Multigroup Precoding and User Scheduling for Frame-Based Satellite Communications [PDF]
, 2014 The present work focuses on the forward link of a broadband multibeam satellite system that aggressively reuses the user link frequency resources. Two fundamental practical challenges, namely the need to frame multiple users per transmission and the per ...
Chatzinotas, Symeon +2 more
core +3 more sources
Symbol-Level Multiuser MISO Precoding for Multi-level Adaptive Modulation [PDF]
, 2017 Symbol-level precoding is a new paradigm for multiuser downlink systems which aims at creating constructive interference among the transmitted data streams.
Alodeh, Maha +2 more
core +2 more sources