A
Ashkan Kalantari
Researcher at University of Luxembourg
Publications - 37
Citations - 742
Ashkan Kalantari is an academic researcher from University of Luxembourg. The author has contributed to research in topics: Relay & Precoding. The author has an hindex of 16, co-authored 37 publications receiving 646 citations. Previous affiliations of Ashkan Kalantari include Linköping University & K.N.Toosi University of Technology.
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Journal ArticleDOI
Directional Modulation Via Symbol-Level Precoding: A Way to Enhance Security
TL;DR: The concept of directional modulation is employed and a signal processing approach is followed to enhance the security of multiuser multi-input multioutput (MIMO) communication systems when a multiantenna eavesdropper is present.
Journal ArticleDOI
Symbol-Level and Multicast Precoding for Multiuser Multiantenna Downlink: A State-of-the-Art, Classification, and Challenges
Maha Alodeh,Danilo Spano,Ashkan Kalantari,Christos G. Tsinos,Dimitrios Christopoulos,Symeon Chatzinotas,Bjorn Ottersten +6 more
TL;DR: A unified view and classification of precoding techniques with respect to two main axes is presented: 1) the switching rate of the precoding weights, leading to the classes of block-level and symbol-level precoding and 2) the number of users that each stream is addressed to, hence unicast, multicast, and broadcast precoding.
Journal ArticleDOI
Secrecy Analysis on Network Coding in Bidirectional Multibeam Satellite Communications
TL;DR: The confidentiality issue in a bidirectional satellite network consisting of two mobile users who want to exchange message via a multibeam satellite using the XOR network coding protocol is studied to maximize the sum secrecy rate by designing the optimal beamforming vector along with optimizing the return and forward link time allocation.
Journal ArticleDOI
Joint Power Control in Wiretap Interference Channels
TL;DR: It is shown that in general, the secrecy energy efficiency of user 1 in an interference channel scenario is higher than that of an interference-free channel.
Proceedings ArticleDOI
Cache-Assisted Hybrid Satellite-Terrestrial Backhauling for 5G Cellular Networks
TL;DR: Simulation results show that the hybrid satellite-terrestrial architecture considerably reduces the content placement time while sustaining the cache hit ratio quite close to the upper-bound compared to the satellite-only method.