17 citations · 21 across the 10 of their papers we have counts for
15 papers
WiFi-Based Channel Impulse Response Estimation and Localization via Multi-Band Splicing
Mahdi Barzegar Khalilsarai, Benedikt Gross, Stelios Stefanatos +2
Using commodity WiFi data for applications such as indoor localization, object identification and tracking and channel sounding has recently gained considerable attention. We study…
WiFi-Based Indoor Localization via Multi-Band Splicing and Phase Retrieval
Mahdi Barzegar Khalilsarai, Stelios Stefanatos, Gerhard Wunder +1
We study the problem of indoor localization using commodity WiFi channel state information (CSI) measurements. The accuracy of methods developed to address this problem is limited…
Non-Coherent Joint Transmission in Poisson Cellular Networks Under Pilot Contamination
Stelios Stefanatos, Gerhard Wunder
This paper investigates the performance of downlink cellular networks with non-coherent joint (mutlipoint) transmissions and practical channel estimation. Under a stochastic geomet…
Low-Overhead Hierarchically-Sparse Channel Estimation for Multiuser Wideband Massive MIMO
Gerhard Wunder, Stelios Stefanatos, Axel Flinth +2
The problem of excessive pilot overhead required for uplink massive MIMO channel estimation is well known, let alone when it is considered along with wideband (OFDM) transmissions.…
Wideband Massive MIMO Channel Estimation via Sequential Atomic Norm Minimization
Stelios Stefanatos, Mahdi Barzegar Khalilsarai, Gerhard Wunder
The recently introduced atomic norm minimization (ANM) framework for parameter estimation is a promising candidate towards low overhead channel estimation in wireless communication…
Performance Limits of Compressive Sensing Channel Estimation in Dense Cloud RAN
Stelios Stefanatos, Gerhard Wunder
Towards reducing the training signaling overhead in large scale and dense cloud radio access networks (CRAN), various approaches have been proposed based on the channel sparsificat…
Low Complexity Resource Allocation for Massive Carrier Aggregation
Stelios Stefanatos, Fotis Foukalas, Theodoros A. Tsiftsis
Optimal resource allocation (RA) in massive carrier aggregation scenarios is a challenging combinatorial optimization problem whose dimension is proportional to the number of users…
Cross-Mode Interference Characterization in Cellular Networks with Voronoi Guard Regions
Stelios Stefanatos, Antonis G. Gotsis, Angeliki Alexiou
Advances in cellular networks such as device-to-device communications and full-duplex radios, as well as the inherent elimination of intra-cell interference achieved by network-con…
Ultra Dense Networks: The New Wireless Frontier for Enabling 5G Access
Antonis G. Gotsis, Stelios Stefanatos, Angeliki Alexiou
The extreme traffic load that future wireless networks are expected to accommodate requires a re-thinking of the system design. Initial estimations indicate that, different from th…
Optimal User Association for Massive MIMO Empowered Ultra-Dense Wireless Networks
Antonis G. Gotsis, Stelios Stefanatos, Angeliki Alexiou
Ultra network densification and Massive MIMO are considered major 5G enablers since they promise huge capacity gains by exploiting proximity, spectral and spatial reuse benefits. B…
Operational Region of D2D Communications for Enhancing Cellular Network Performance
Stelios Stefanatos, Antonis G. Gotsis, Angeliki Alexiou
An important enabler towards the successful deployment of any new element/feature to the cellular network is the investigation and characterization of the operational conditions wh…
Spatial Coordination Strategies in Future Ultra-Dense Wireless Networks
Antonis G. Gotsis, Stelios Stefanatos, Angeliki Alexiou
Ultra network densification is considered a major trend in the evolution of cellular networks, due to its ability to bring the network closer to the user side and reuse resources t…
Analytical Assessment of Coordinated Overlay D2D Communications
Stelios Stefanatos, Antonis G. Gotsis, Angeliki Alexiou
In this paper, analytical assessment of overlay-inband device-to-device (D2D) communications is investigated, under cellular-network-assisted (coordinated) scheduling. To this end,…
Exploiting Frequency and Spatial Dimensions in Small Cell Wireless Networks
Stelios Stefanatos, Angeliki Alexiou
This paper examines the efficiency of spatial and frequency dimensions in serving multiple users in the downlink of a small cell wireless network with randomly deployed access poin…
Access Point Density and Bandwidth Partitioning in Ultra Dense Wireless Networks
Stelios Stefanatos, Angeliki Alexiou
This paper examines the impact of system parameters such as access point density and bandwidth partitioning on the performance of randomly deployed, interference-limited, dense wir…