57 citations · 218 across the 29 of their papers we have counts for
23 papers · 1 filter
Secure Beamforming in Multi-User Multi-IRS Millimeter Wave Systems
Anahid Rafieifar, Hosein Ahmadinejad, S. Mohammad Razavizadeh +1
We study the secrecy rate maximization problem in a millimeter wave (mmWave) network, consisting of a base station (BS), multiple intelligent reflecting surfaces (IRSs) (or reconfi…
Capacity Achieving Design for Hybrid Beamforming in Millimeter Wave Massive MIMO Systems
Rohollah Vahdani, S. Mohammad Razavizadeh
Hybrid digital and analog beamforming is a highly effective technique for implementing beamforming methods in millimeter wave (mmWave) systems. It provides a viable solution to rep…
Securing RIS-Aided Wireless Networks Against Full Duplex Active Eavesdropping
Atefeh Zakeri, S. Mohammad Razavizadeh
This paper investigates the physical layer security of a Reconfigurable Intelligent Surface (RIS)-aided wireless network in the presence of full-duplex active eavesdropping. In thi…
Integrated Access and Backhaul (IAB) in Low Altitude Platforms
Reza Ghasemi Alavicheh, S. Mohammad Razavizadeh, Halim Yanikomeroglu
In this paper, we explore the problem of utilizing Integrated Access and Backhaul (IAB) technology in Non-Terrestrial Networks (NTN), with a particular focus on aerial access netwo…
Integrated Access and Backhaul in Cell-free Massive MIMO Systems
Ali Hosseinalipour Jazi, S. Mohammad Razavizadeh, Tommy Svensson
One of the major challenges with cell-free (CF) massive multiple-input multiple-output (MIMO) networks is providing backhaul links for a large number of distributed access points (…
Direction-Based Jamming Detection and Suppression in mmWave Massive MIMO Networks
Saeed Bagherinejad1, S. Mohammad Razavizadeh
In this paper, we study the problem of physical layer security in the uplink of millimeter-wave massive multiple-input multiple-output (MIMO) networks and propose a jamming detecti…
Vertical Beamforming in Reconfigurable Intelligent Surface-aided Cognitive Radio Networks
S. Fatemeh Zamanian, S. Mohammad Razavizadeh, Qingqing Wu
In this letter, we investigate joint application of reconfigurable intelligent surface (RIS) and vertical beamforming in cognitive radio networks (CRN). After properly modeling the…
Spectral Efficiency of Dense Multicell Massive MIMO Networks in Spatially Correlated Channels
FahimeSadat Mirhosseini, Aliakbar Tadaion, S. Mohammad Razavizadeh
This paper is on the spectral efficiency (SE) of a dense multi-cell massive multiple-input multiple-output (MIMO). The channels are spatially correlated and the multi-slope path lo…
Secrecy Rate Maximization in Multi-IRS Millimeter Wave Networks
Anahid Rafieifar, S. Mohammad Razavizadeh
This paper investigates the problem of increasing the security at the physical layer of a Millimeter Wave (mmWave) network equipped with several Intelligent Reflecting Surfaces (IR…
Secure Simultaneous Information and Power Transfer for Downlink Multi-user Massive MIMO
Zahra Goli, S. Mohammad Razavizadeh, Hamed Farhadi +1
In this paper, downlink secure transmission in simultaneous information and power transfer (SWIPT) system enabled with massive multiple-input multiple-output (MIMO) is studied. A b…
Jamming-Robust Uplink Transmission for Spatially Correlated Massive MIMO Systems
Hossein Akhlaghpasand, Emil Björnson, S. Mohammad Razavizadeh
In this paper, we consider how the uplink transmission of a spatially correlated massive multiple-input multiple-output (MIMO) system can be protected from a jamming attack. To sup…
3D Beamforming in Reconfigurable Intelligent Surfaces-assisted Wireless Communication Networks
S. Mohammad Razavizadeh, Tommy Svensson
Reconfigurable Intelligent Surfaces (RIS) or Intelligent Reflecting Surfaces (IRS) are metasurfaces that can be deployed in various places in wireless environments to make these en…
Jamming Suppression in Massive MIMO Systems
Hossein Akhlaghpasand, Emil Björnson, S. Mohammad Razavizadeh
In this paper, we propose a framework for protecting the uplink transmission of a massive multiple-input multiple-output (mMIMO) system from a jamming attack. Our framework include…
QoE-Aware Beamforming Design for Massive MIMO Heterogeneous Networks
Hadis Abarghouyi, S. Mohammad Razavizadeh, Emil Bjornson
One of the main goals of the future wireless networks is improving the users quality of experience (QoE). In this paper, we consider the problem of QoE-based resource allocation in…
Jamming Detection in Massive MIMO Systems
Hossein Akhlaghpasand, S. Mohammad Razavizadeh, Emil Björnson +1
This paper considers the physical layer security of a pilot-based massive multiple-input multiple-output (MaMIMO) system in presence of a multi-antenna jammer. To improve security…
Impact of User Height on the Coverage of 3D Beamforming-Enabled Massive MIMO Systems
M. Baianifar, S. Khavari, S. M. Razavizadeh +1
In this paper, we perform a coverage analysis of a cellular massive multiple-input multiple-output (MaMIMO) network which adopts 3D beamforming. In contrast to the previous works o…
Enhancement of Physical Layer Security Using Destination Artificial Noise Based on Outage Probability
Ali Rahmanpour, Vahid T. Vakili, S. Mohammad Razavizadeh
In this paper, we study using Destination Artificial Noise (DAN) besides Source Artificial Noise (SAN) to enhance physical layer secrecy with an outage probability based approach.…
Energy Efficient Precoding Design for SWIPT in MIMO Two-Way Relay Networks
Javane Rostampoor, S. Mohammad Razavizadeh, Inkyu Lee
In this paper, we study the energy efficiency (EE) maximization problem in multiple-input multiple-output (MIMO) two-way relay networks with simultaneous wireless information and p…
Jamming-Resistant Receivers for the Massive MIMO Uplink
Tan Tai Do, Emil Björnson, Erik G. Larsson +1
We design a jamming-resistant receiver scheme to enhance the robustness of a massive MIMO uplink system against jamming. We assume that a jammer attacks the system both in the pilo…
Resource Allocation and Relay Selection In Full-Duplex Cooperative Orthogonal Frequency Division Multiple Access Networks
Jafar Banar, S. Mohammad Razavizadeh
This paper is on relay selection in uplink of an in-band full-duplex (IBFD) cooperative cellular network. Assuming an orthogonal frequency division multiple access (OFDMA) cellular…
Joint Tilt Angle Adaptation and Beamforming in Multicell Multiuser Cellular Networks
Soheil Khavari Moghaddam, S. Mohammad Razavizadeh
3D beamforming is a promising approach for interference coordination in cellular networks which brings significant improvements in comparison with conventional 2D beamforming techn…
On the Uplink Spectral Efficiency of Full-Duplex Cooperative OFDMA Systems
Jafar Banar, S. Mohammad Razavizadeh
In this paper, we develop a resource allocation algorithm for uplink of in-band full-duplex (FD) cellular networks. The FD cellular network is assumed to be based on orthogonal fre…
Subverting Massive MIMO by Smart Jamming
Hessam Pirzadeh, S. Mohammad Razavizadeh, Emil Björnson
We consider uplink transmission of a massive multi-user multiple-input multiple-output (MU-MIMO) system in the presence of a smart jammer. The jammer aims to degrade the sum spectr…