55 citations · 106 across the 22 of their papers we have counts for
27 papers
Massive MIMO over Correlated Fading Channels: Multi-Cell MMSE Processing, Pilot Assignment and Power Control
Masoud Elyasi, Azadeh Vosoughi
We consider a multi-cell massive multiple-input-multiple-output (MIMO) system with correlated Rayleigh fading channels, where pilot reuse is permitted within each cell (to reduce p…
On Distributed Detection in EH-WSNs With Finite-State Markov Channel and Limited Feedback
Ghazaleh Ardeshiri, Azadeh Vosoughi
We consider a network, tasked with solving binary distributed detection, consisting of N sensors, a fusion center (FC), and a feedback channel from the FC to sensors. Each sensor i…
On Adaptive Transmission for Distributed Detection in Energy Harvesting Wireless Sensor Networks with Limited Fusion Center Feedback
Ghazaleh Ardeshiri, Azadeh Vosoughi
We consider a wireless sensor network, consisting of N heterogeneous sensors and a fusion center (FC), tasked with solving a binary distributed detection problem. Sensors communica…
Adaptive Transmission for Distributed Detection in Energy Harvesting Wireless Sensor Networks
Ghazaleh Ardeshiri, Azadeh Vosoughi
We consider a wireless sensor network, consisting of N heterogeneous sensors and a fusion center (FC), tasked with detecting a known signal in uncorrelated Gaussian noises. Each se…
Steady-State Rate-Optimal Power Adaptation in Energy Harvesting Opportunistic Cognitive Radios with Spectrum Sensing and Channel Estimation Errors
Hassan Yazdani, Azadeh Vosoughi
We consider an opportunistic cognitive radio network, consisting of Nu secondary users (SUs) and an access point (AP), that can access a spectrum band licensed to a primary user. E…
Achievable Rates of Opportunistic Cognitive Radio Systems Using Reconfigurable Antennas with Imperfect Sensing and Channel Estimation
Hassan Yazdani, Azadeh Vosoughi, Xun Gong
We consider an opportunistic cognitive radio (CR) system in which secondary transmitter (SUtx) is equipped with a reconfigurable antenna (RA). Utilizing the beam steering capabilit…
Power Adaptation for Distributed Detection in Energy Harvesting WSNs with Finite-Capacity Battery
Ghazaleh Ardeshiri, Hassan Yazdani, Azadeh Vosoughi
We consider a wireless sensor network, consisting of N heterogeneous sensors and a fusion center (FC), that is tasked with solving a binary distributed detection problem. Each sens…
On Bandwidth Constrained Distributed Detection of a Deterministic Signal in Correlated Noise
Nahal Maleki, Azadeh Vosoughi
We consider a Neyman-Pearson (NP) distributed binary detection problem in a bandwidth constrained wireless sensor network, where the fusion center (FC) is responsible for fusing si…
On Distributed Estimation in Hierarchical Power Constrained Wireless Sensor Networks
Mojtaba Shirazi, Azadeh Vosoughi
We consider distributed estimation of a random source in a hierarchical power constrained wireless sensor network. Sensors within each cluster send their measurements to a cluster…
Source Localization and Tracking for Dynamic Radio Cartography using Directional Antennas
Mohsen Joneidi, Hassan Yazdani, Azadeh Vosoughi +1
Utilization of directional antennas is a promising solution for efficient spectrum sensing and accurate source localization and tracking. Spectrum sensors equipped with directional…
On the Spectrum Sensing, Beam Selection and Power Allocation in Cognitive Radio Networks Using Reconfigurable Antennas
Hassan Yazdani, Azadeh Vosoughi
In this paper, we consider a cognitive radio (CR) system consisting of a primary user (PU) and a pair of secondary user transmitter (SUtx) and secondary user receiver (SUrx). The S…
Beam Selection and Discrete Power Allocation in Opportunistic Cognitive Radio Systems with Limited Feedback Using ESPAR Antennas
Hassan Yazdani, Azadeh Vosoughi, Xun Gong
We consider an opportunistic cognitive radio (CR) system consisting of a primary user (PU), secondary transmitter (SUtx), and secondary receiver (SUrx), where SUtx is equipped with…
Optimal Local Thresholds for Distributed Detection in Energy Harvesting Wireless Sensor Networks
Ghazaleh Ardeshiri, Hassan Yazdani, Azadeh Vosoughi
We consider a wireless sensor network, consisting of K heterogeneous sensors and a fusion center (FC), that is tasked with solving a binary distributed detection problem. Each sens…
On Optimal Sensing and Capacity Trade-off in Cognitive Radio Systems with Directional Antennas
Hassan Yazdani, Azadeh Vosoughi
We consider a cognitive radio system, in which the secondary users (SUs) and primary users (PUs) coexist. The SUs are equipped with steerable directional antennas. In our system, t…
Detection of Brain Stimuli Using Ramanujan Periodicity Transforms
Pouria Saidi, Azadeh Vosoughi, George Atia
The ability to efficiently match the frequency of the brain's response to repetitive visual stimuli in real time is the basis for reliable SSVEP-based Brain-Computer-Interfacing (B…
Sensor Selection and Power Allocation via Maximizing Bayesian Fisher Information for Distributed Vector Estimation
Mojtaba Shirazi, Alireza Sani, Azadeh Vosoughi
In this paper we study the problem of distributed estimation of a Gaussian vector with linear observation model in a wireless sensor network (WSN) consisting of K sensors that tran…
On the Combined Effect of Directional Antennas and Imperfect Spectrum Sensing upon Ergodic Capacity of Cognitive Radio Systems
Hassan Yazdani, Azadeh Vosoughi
We consider a cognitive radio system, consisting of a primary transmitter (PUtx), a primary receiver (PUrx), a secondary transmitter (SUtx), and a secondary receiver (SUrx). The se…
On Power Allocation for Distributed Detection with Correlated Observations and Linear Fusion
Hamid R. Ahmadi, Nahal Maleki, Azadeh Vosoughi
We consider a binary hypothesis testing problem in an inhomogeneous wireless sensor network, where a fusion center (FC) makes a global decision on the underlying hypothesis. We ass…
On Distributed Linear Estimation With Observation Model Uncertainties
Alireza Sani, Azadeh Vosoughi
We consider distributed estimation of a Gaussian source in a heterogenous bandwidth constrained sensor network, where the source is corrupted by independent multiplicative and addi…
On M-ary Distributed Detection for Power Constraint Wireless Sensor Networks
Zahra Hajibabaei, Jalil Modares, Azadeh Vosoughi
We consider a wireless sensor network (WSN), consisting of several sensors and a fusion center (FC), which is tasked with solving an M-ary hypothesis testing problem. Sensors make…
On Bayesian Fisher Information Maximization for Distributed Vector Estimation
Mojtaba Shirazi, Azadeh Vosoughi
We consider the problem of distributed estimation of a Gaussian vector with linear observation model. Each sensor makes a scalar noisy observation of the unknown vector, quantizes…
A New Statistical Model of Electroencephalogram Noise Spectra for Real-time Brain-Computer Interfaces
Alan Paris, George Atia, Azadeh Vosoughi +1
: A characteristic of neurological signal processing is high levels of noise from sub-cellular ion channels up to whole-brain processes. In this paper, we propose a new…
Synchronization in Networked Systems with Parameter Mismatch: Adaptive Decentralized and Distributed Controls
Saeed Manaffam, Alireza Seyedi, Azadeh Vosoughi +1
Here, we study the ultimately bounded stability of network of mismatched systems using Lyapunov direct method. We derive an upper bound on the norm of the error of network states f…
Bounded Stability in Networked Systems with Parameter Mismatch and Adaptive Decentralized Estimation
Saeed Manaffam, Alireza Seyedi, Azadeh Vosoughi +1
Here, we study the ultimately bounded stability of network of mismatched systems using Lyapunov direct method. The upper bound on the error of oscillators from the center of the ne…