107 citations · 731 across the 41 of their papers we have counts for
31 papers · 1 filter
A Riemannian Manifold Approach to Constrained Resource Allocation in ISAC
Shayan Zargari, Diluka Galappaththige, Chintha Tellambura +1
This paper introduces a new resource allocation framework for integrated sensing and communication (ISAC) systems, which are expected to be fundamental aspects of sixth-generation…
Signal Detection in Ambient Backscatter Systems: Fundamentals, Methods, and Trends
Shayan Zargari, Azar Hakimi, Fatemeh Rezaei +2
Internet-of-Things (IoT) is rapidly growing in wireless technology, aiming to connect vast numbers of devices to gather and distribute vital information. Despite individual devices…
Enhancing AmBC Systems with Deep Learning for Joint Channel Estimation and Signal Detection
S. Zargari, A. Hakimi, C. Tellambura +1
The era of ubiquitous, affordable wireless connectivity has opened doors to countless practical applications. In this context, ambient backscatter communication (AmBC) stands out,…
Cell-Free Bistatic Backscatter Communication: Channel Estimation, Optimization, and Performance Analysis
Diluka Galappaththige, Fatemeh Rezaei, Chintha Tellambura +1
This study introduces and investigates the integration of a cell-free architecture with bistatic backscatter communication (BiBC), referred to as cell-free BiBC or distributed acce…
Breaking the Interference and Fading Gridlock in Backscatter Communications: State-of-the-Art, Design Challenges, and Future Directions
Bowen Gu, Dong Li, Haiyang Ding +2
As the Internet of Things (IoT) advances by leaps and bounds, a multitude of devices are becoming interconnected, marking the onset of an era where all things are connected. While…
User Scheduling and Trajectory Optimization for Energy-Efficient IRS-UAV Networks with SWIPT
S. Zargari, A. Hakimi, C. Tellambura +1
This paper investigates user scheduling and trajectory optimization for a network supported by an intelligent reflecting surface (IRS) mounted on an unmanned aerial vehicle (UAV).…
IRS-Enabled Backscattering in a Downlink Non-Orthogonal Multiple Access System
Azar Hakimi, Shayan Zargari, Chintha Tellambura +1
Intelligent reflecting surface (IRS)-enabled backscatter communications can be enabled by an access point (AP) that splits its transmit signal into modulated and unmodulated parts.…
Doppler Shift and Channel Estimation for Intelligent Transparent Surface Assisted Communication Systems on High-Speed Railways
Yirun Wang, Gongpu Wang, Ruisi He +2
The critical distinction between the emerging intelligent transparent surface (ITS) and intelligent reflection surface (IRS) is that the incident signals can penetrate the ITS inst…
Multiuser MISO PS-SWIPT Systems: Active or Passive RIS?
Shayan Zargari, Azar Hakimi, Chintha Tellambura +1
Reconfigurable intelligent surface (RIS)-based communication networks promise to improve channel capacity and energy efficiency. However, the promised capacity gains could be negli…
Energy-Efficient Hybrid Offloading for Backscatter-Assisted Wirelessly Powered MEC with Reconfigurable Intelligent Surfaces
S. Zargari, C. Tellambura, S. Herath
We investigate a wireless power transfer (WPT)-based backscatter-mobile edge computing (MEC) network with a {reconfigurable intelligent surface (RIS)}.In this network, wireless dev…
New Antenna Selection Schemes for Full-Duplex Cooperative MIMO-NOMA Systems
Zahra Mobini, Mohammadali Mohammadi, Theodoros A. Tsiftsis +2
In this paper, we address the antenna selection (AS) problem in full-duplex (FD) cooperative non-orthogonal multiple access (NOMA) systems, where a multi-antenna FD relay bridges t…
Channel Estimation for Wireless Communication Systems Assisted by Large Intelligent Surfaces
Junliang Lin, Gongpu Wang, Rongfei Fan +2
In this letter, the channel estimation problem is studied for wireless communication systems assisted by large intelligent surface. Due to features of assistant channel, channel es…
Rate Analysis of Cell-Free Massive MIMO-NOMA With Three Linear Precoders
Fatemeh Rezaei, Chintha Tellambura, Aliakbar Tadaion +1
Although the hybrid of cell-free (CF) massive multiple-input multiple-output (MIMO) and non-orthogonal multiple access (NOMA) promises massive spectral efficiency gains, the type o…
Eigenvalue Based Detection of a Signal in Colored Noise: Finite and Asymptotic Analyses
Lahiru D. Chamain, Prathapasinghe Dharmawansa, Saman Atapattu +1
Signal detection in colored noise with an unknown covariance matrix has a myriad of applications in diverse scientific/engineering fields. The test statistic is the largest general…
Detection of a Signal in Colored Noise: A Random Matrix Theory Based Analysis
Lahiru D. Chamain, Prathapasinghe Dharmawansa, Saman Atapattu +1
This paper investigates the classical statistical signal processing problem of detecting a signal in the presence of colored noise with an unknown covariance matrix. In particular,…
Closed-Form Word Error Rate Analysis for Successive Interference Cancellation Decoders
Jinming Wen, Keyu Wu, Chintha Tellambura +1
We consider the estimation of an integer vector $\hbx\in \mathbb{Z}^n$ from the linear observation $\y=\A\hbx+\v$, where $\A\in\mathbb{R}^{m\times n}$ is a random matrix with indep…
Outage Analysis of Ambient Backscatter Communication Systems
Wenjing Zhao, Gongpu Wang, Saman Atapattu +1
This paper addresses the problem of outage characterization of an ambient backscatter communication system with a pair of passive tag and reader. In particular, an exact expression…
On the Success Probability of the Box-Constrained Rounding and Babai Detectors
Xiao-Wen Chang, Jinming Wen, Chintha Tellambura
In communications, one frequently needs to detect a parameter vector $\hbx$ in a box from a linear model. The box-constrained rounding detector $\x^\sBR$ and Babai detector $\x^\sB…
Storage Allocation for Multi-Class Distributed Data Storage Systems
Koosha Pourtahmasi Roshandeh, Moslem Noori, Masoud Ardakani +1
Distributed storage systems (DSSs) provide a scalable solution for reliably storing massive amounts of data coming from various sources. Heterogeneity of these data sources often m…
An Efficient Optimal Algorithm for the Successive Minima Problem
Jinming Wen, Lanping Li, Xiaohu Tang +1
In many applications including integer-forcing linear multiple-input and multiple-output (MIMO) receiver design, one needs to solve a successive minima problem (SMP) on an -dime…
A general framework for weighted sum-rate and common-rate optimization
Koosha Pourtahmasi Roshandeh, Masoud Ardakani, Chintha Tellambura
In this paper, we propose a framework for solving a class of optimization problems encountered in a range of power allocation problems in wireless relay networks. In particular, po…
Uplink and Downlink Rate Analysis of a Full-Duplex C-RAN with Radio Remote Head Association
Mohammadali Mohammadi, Himal A. Suraweera, Chintha Tellambura
We characterize the uplink (UL) and downlink (DL) rates of a full-duplex cloud radio access network (C-RAN) with all participate and single best remote radio head (RRH) association…
Full-Duplex Cloud-RAN with Uplink/Downlink Remote Radio Head Association
Mohammadali Mohammadi, Himal A. Suraweera, Chintha Tellambura
This paper considers a cloud radio access network (C-RAN) where spatially distributed remote radio heads (RRHs) communicate with a full-duplex user. In order to reflect a realistic…
Full-Duplex Radio for Uplink/Downlink Wireless Access with Spatially Random Nodes
Mohammadali Mohammadi, Himal A. Suraweera, Yun Cao +2
A full-duplex (FD) multiple antenna access point (AP) communicating with single antenna half-duplex (HD) spatially random users to support simultaneous uplink (UL)/downlink (DL) tr…