7 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…
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…