Zobrazeno 1 - 10
of 128
pro vyhledávání: '"Farhang, Arman"'
Orthogonal time frequency space modulation (OTFS) is currently one of the most robust modulation techniques for high Doppler channels. However, to reap the benefits of OTFS, an accurate channel estimation is crucial. To this mean, the widely used emb
Externí odkaz:
http://arxiv.org/abs/2410.11739
In this paper, we propose time and frequency synchronization techniques for the uplink of multiuser OTFS (MU-OTFS) in high-mobility scenarios. We introduce a spectrally efficient and practical pilot pattern where each user utilizes a pilot with a cyc
Externí odkaz:
http://arxiv.org/abs/2410.10740
In this paper, we propose a network architecture where two types of aerial infrastructures together with a ground station provide connectivity to a remote area. A high altitude platform station (HAPS) is equipped with reconfigurable intelligent surfa
Externí odkaz:
http://arxiv.org/abs/2409.17817
Autor:
Dinan, Mohamad H., Farhang, Arman
In this paper, we explore the integration of two revolutionary technologies, reconfigurable intelligent surfaces (RISs) and orthogonal time frequency space (OTFS) modulation, to enhance high-speed wireless communications. We introduce a novel phase s
Externí odkaz:
http://arxiv.org/abs/2404.07759
Autor:
Farhang, Arman, Bayat, Mohsen
This paper compares orthogonal time frequency space (OTFS) modulation and single-carrier frequency division multiple access (SC-FDMA). It shows that these are equivalent except for a set of linear phase shifts, applied to the transmit/receive data sy
Externí odkaz:
http://arxiv.org/abs/2402.07751
Autor:
Bayat, Mohsen, Farhang, Arman
Delay-Doppler multiplexing has recently stirred a great deal of attention in research community. While multiple studies have investigated pulse-shaping aspects of this technology, it is challenging to identify the relationships between different puls
Externí odkaz:
http://arxiv.org/abs/2311.12543
This paper introduces a practical precoding method for the downlink of Filter Bank Multicarrier-based (FBMC-based) massive multiple-input multiple-output (MIMO) systems. The proposed method comprises a two-stage precoder, consisting of a fractionally
Externí odkaz:
http://arxiv.org/abs/2311.10374
Autor:
Bayat, Mohsen, Farhang, Arman
The primary objective of this paper is to establish a generalized framework for pulse-shaping on the delay-Doppler plane. To this end, we classify delay-Doppler pulse-shaping techniques into two types, namely, circular and linear pulse-shaping. This
Externí odkaz:
http://arxiv.org/abs/2311.06936
Orthogonal time frequency space (OTFS) is a promising candidate waveform for the next generation wireless communication systems. OTFS places data in the delay-Doppler (DD) domain, which simplifies channel estimation in highmobility scenarios. However
Externí odkaz:
http://arxiv.org/abs/2305.14966
Orthogonal time frequency space (OTFS) modulation has recently emerged as a potential 6G candidate waveform which provides improved performance in high-mobility scenarios. In this paper we investigate the combination of OTFS with non-orthogonal multi
Externí odkaz:
http://arxiv.org/abs/2304.13607