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George Sklivanitis

5 accepted papers

2023

Single-Sample Direction-of-Arrival Estimation for Fast and Robust 3D Localization With Real Measurements from a Massive MIMO System

Stepan Mazokha, Sanaz Naderi, Georgios I. Orfanidis, George Sklivanitis, Dimitris A. Pados, Jason O. Hallstrom
ICASSP 2023accepted

Fast, robust, high-accuracy localization is a key enabler for future location-aware applications in streetscape communication networks and next-generation networked autonomous agents. Specifically, massive multiple-input and multiple-output (MIMO) antenna systems have received increasing attention d…

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2020

Optimal Joint Channel Estimation and Data Detection by L1-norm PCA for Streetscape IoT

George Sklivanitis, Konstantinos Tountas, Nicholas Tsagkarakis, Dimitris A. Pados, Stella N. Batalama
ICASSP 2020accepted

We prove, for the first time in the literature of communication theory and machine learning, the equivalence of joint maximum-likelihood (ML) optimal channel estimation and data detection (JOCEDD) to the problem of finding the L <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http:/…

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2019

Dynamic Joint PHY-MAC Waveform Design for IoT Connectivity

Konstantinos Tountas, George Sklivanitis, Dimitris A. Pados
ICASSP 2019accepted

We envision dense network deployments of Internet-of-Things (IoT) connected devices that report data to a common base station (BS). The devices utilize repeats of a basic shaping pulse occupying the entire continuum of the device-accessible spectrum. We propose an optimal algorithm to adaptively des…

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2018

Small-Sample-Support Channel Estimation for Massive Mimo Systems

George Sklivanitis, Konstantinos Tountas, Dimitris A. Pados, Stella N. Batalama
ICASSP 2018accepted

We consider the problem of blind channel estimation with minimal pilot signaling in multi-cell multi-user MIMO systems with very large antenna arrays at the base station. We develop a least-squares (LS)-type algorithm that iteratively extracts channel and data estimates in short-data record multicel…

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2017

Sparse waveform design for all-spectrum channelization

George Sklivanitis, Panos P. Markopoulos, Stella N. Batalama, Dimitris A. Pados
ICASSP 2017accepted

We introduce maximum-SINR sparse-binary waveforms that modulate data information symbols from any finite alphabet and span the whole continuum of the available/device-accessible spectrum. We offer an optimal algorithm that designs the proposed waveforms by maximizing the signal-to-interference-plus-…

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