<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Spectral-Efficient Model for Multiuser Massive MIMO: Exploiting User Velocity"^^ . "The employment of a massive number of antennas\r\nin multiple-input multiple-output systems, known as massive MIMO, has drawn a new horizon for future communications systems to support a very large number of users. However, the actual number of active users in massive MIMO are limited by pilots training via the coherence time of the communication channel which is inversely proportional to the user velocity. The\r\ncurrent model applies this coherence time for every user to design multiuser massive MIMO, which might result in a suboptimal solution since the users usually move at different speeds in practice. In this paper, we investigate multiuser massive MIMO by taking into consideration the differences in user velocities.\r\nIn particular, two multiuser models are proposed to maximize the per-user spectral efficiency and the number of served users, respectively. System capacity of the proposed models is provided in analytical expression. Finally, numerical results demonstrate the advantages of our proposed models compared with the reference model."^^ . "2017-05-21" . . . . . . . . . . . . . . . . . "Symeon"^^ . "Chatzinotas"^^ . "Symeon Chatzinotas"^^ . . "Anh Vu"^^ . "Trinh"^^ . "Anh Vu Trinh"^^ . . "Xuan Thang"^^ . "Vu"^^ . "Xuan Thang Vu"^^ . . "Björn"^^ . "Ottersten"^^ . "Björn Ottersten"^^ . . . . "IEEE international Conference on Communications"^^ . . . . . "Paris, France"^^ . . . . . . "Spectral-Efficient Model for Multiuser Massive MIMO: Exploiting User Velocity (PDF)"^^ . . . "ICC2017.pdf"^^ . . "HTML Summary of #2489 \n\nSpectral-Efficient Model for Multiuser Massive MIMO: Exploiting User Velocity\n\n" . "text/html" . . . "Communications"@en . .