Browsing by Author "Afeef, Liza"
Now showing items 1-8 of 8
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Beam squint effect in multi-beam mmWave massive MIMO systems
Afeef, Liza; Arslan, Hüseyin (Institute of Electrical and Electronics Engineers Inc., 2022)In multicarrier wideband millimeter-wave (mmWave) communications, as the size of antenna array increases, as in massive multiple-input multiple-output (MIMO), an additional propagation delay of the electromagnetic wave at ... -
Beam squint inspired multiple access technique in massive MIMO systems
Kihero, Abuu B.; Afeef, Liza; Arslan, Hüseyin (Institute of Electrical and Electronics Engineers Inc., 2022)Massive multiple-input multiple-output (mMIMO) systems implementing wideband signaling have been found to suffer from beam squinting problem. In multicarrier systems, beam squint causes spreading of the beam to multiple ... -
Dynamic sidelobe multiplexing in beamspace MIMO systems
Karabacak, Murat; Afeef, Liza; Arslan, Hüseyin (IEEE-Institute of Electrical and Electronics Engineers Inc, 2020)Recent studies on multiplexing concept over beamspace multiple-input-multiple-output (MIMO) can reduce the need for using phase shifters while keeping the directivity performance at similar levels. Thus, beamspace MIMO ... -
Energy and spectral-efficient lens antenna subarray design in MmWave MIMO Systems
Afeef, Liza; Mumcu, Gökhan; Arslan, Hüseyin (IEEE-Institute Electrical Electronics Engineers Inc, 2022)Lens antenna subarray (LAS) is one of the recently introduced technologies for future wireless networks that significantly improves the energy efficiency of multiple-input multiple-output (MIMO) systems while achieving ... -
Heuristic inspired precoding for millimeter-wave MIMO systems with lens antenna subarrays
Çetinkaya, Şinasi; Afeef, Liza; Mumcu, Gökhan; Arslan, Hüseyin (Institute of Electrical and Electronics Engineers Inc., 2022)A traditional array (TA) multiple-input multiple-output (MIMO) architecture in mmWave with hybrid beamforming suffers from high power consumption and hardware overhead. Therefore, a lens antenna subarray (LAS)-MIMO ... -
Physical layer authentication scheme in beamspace MIMO systems
Afeef, Liza; Furqan, Haji M.; Arslan, Hüseyin (Institute of Electrical and Electronics Engineers Inc., 2022)The broadcast nature of wireless communication makes it vulnerable to various security threats such as spoofing attacks. Physical layer (PL) authentication has emerged as a promising and powerful approach to secure future ... -
Quantum laboratory setup for future wireless communication systems
Solaija, Muhammad Sohaib J.; Janjua, Muhammad Bilal; Afeef, Liza; Tusha, Armed; Duranay, Ahmet Enes; Arslan, Hüseyin; Hasekioǧlu, Orkun (American Institute of Physics Inc., 2019)Fifth generation of wireless communication envisages a diverse network that imposes stringent requirements regarding capacity, reliability, security, latency and seamless connectivity. These lofty goals have driven researchers ... -
Reconfigurable intelligent surface (RIS): Eigenvalue decomposition-based separate channel estimation
Zegrar, Salah Eddine; Afeef, Liza; Arslan, Hüseyin (Institute of Electrical and Electronics Engineers Inc., 2021)Reconfigurable intelligent surface (RIS) has recently drawn significant attention in wireless communication technologies. However, identifying, modeling, and estimating the RIS channel in multiple-input multiple-output ...
