375 citations · 1.2k across the 26 of their papers we have counts for
30 papers
Vehicle-Mounted Steerable Wideband Antenna Array for NATO Band III Tactical Radio Links
Ida Pääkkölä, Mikko Heino, Taneli Riihonen
In this paper, a very compact 2 x 2 wideband beamsteering array with monocone antennas is designed and validated for NATO Band III (1350-2400 MHz) tactical communications with inte…
Decision Feedback-Aided Known-Interference Cancellation
Karel Pärlin, Aaron Byman, Tommi Meriläinen +1
Known-interference cancellation (KIC) in combination with cooperative jamming can be used to provide covertness and security to wireless communications at the physical layer. Howev…
A Variable Step Sizes Frequency Offsets-Compensated Least Mean Squares Algorithm
Karel Pärlin, Aaron Byman, Tommi Meriläinen +1
Frequency offsets-compensated least mean squares (FO-LMS) algorithm is a generic method for estimating a wireless channel under carrier and sampling frequency offsets when the tran…
Next-Generation MIMO Transceivers for Integrated Sensing and Communications: Unique Security Vulnerabilities and Solutions
Kawon Han, Christos Masouros, Taneli Riihonen +1
Integrated sensing and communications (ISAC), which is recognized as a key enabler for sixth generation (6G), has brought new opportunities for intelligent, sustainable, and connec…
On the Military Applications of Large Language Models
Satu Johansson, Taneli Riihonen
In this paper, military use cases or applications and implementation thereof are considered for natural language processing and large language models, which have broken into fame w…
The Role of ISAC in 6G Networks: Enabling Next-Generation Wireless Systems
Muhammad Umar Farooq Qaisar, Weijie Yuan, Onur Günlü +6
The commencement of the sixth-generation (6G) wireless networks represents a fundamental shift in the integration of communication and sensing technologies to support next-generati…
Urban RIS-Assisted HAP Networks: Performance Analysis Using Stochastic Geometry
Islam M. Tanash, Ayush Kumar Dwivedi, Taneli Riihonen
This paper studies a high-altitude platform (HAP) network supported by reconfigurable intelligent surfaces (RISs). The practical irregular placement of HAPs and RISs is modeled usi…
Integrating RIS into HAP Networks for Improved Connectivity
Islam M. Tanash, Ayush Kumar Dwivedi, Taneli Riihonen
This paper investigates a high-altitude platform (HAP) network enhanced with reconfigurable intelligent surfaces (RISs). The arbitrary placement of HAPs and RISs is modeled using s…
In-Band Full-Duplex MIMO Systems for Simultaneous Communications and Sensing: Challenges, Methods, and Future Perspectives
Besma Smida, George C. Alexandropoulos, Taneli Riihonen +1
In-band Full-Duplex (FD) Multiple-Input Multiple-Output (MIMO) systems offer a significant opportunity for Integrated Sensing and Communications (ISAC) due to their capability to r…
Enhancing HAP Networks with Reconfigurable Intelligent Surfaces
Islam M. Tanash, Ayush Kumar Dwivedi, Fatemeh Rafiei Maleki +1
This paper presents and analyzes a reconfigurable intelligent surface (RIS)-based high-altitude platform (HAP) network. Stochastic geometry is used to model the arbitrary locations…
Analog Beamforming for In-Band Full-Duplex Phased Arrays with Quantized Phase Shifters under a Per-Antenna Received Power Constraint
Ao Liu, Ian P. Roberts, Taneli Riihonen +1
This letter develops a novel transmit beamforming (BF) design for canceling self-interference (SI) in analog in-band full-duplex phased arrays. Our design maximizes transmit BF gai…
Beamformer Design and Optimization for Full-Duplex Joint Communication and Sensing at mm-Waves
Carlos Baquero Barneto, Taneli Riihonen, Sahan Damith Liyanaarachchi +3
In this article, we study the joint communication and sensing (JCAS) paradigm in the context of millimeter-wave (mm-wave) mobile communication networks. We specifically address the…
Nonhomogeneous Stochastic Geometry Analysis of Massive LEO Communication Constellations
Niloofar Okati, Taneli Riihonen
Providing truly ubiquitous connectivity requires development of low Earth orbit (LEO) satellite Internet, whose theoretical study is lagging behind network-specific simulations. In…
HybridDeepRx: Deep Learning Receiver for High-EVM Signals
Jaakko Pihlajasalo, Dani Korpi, Mikko Honkala +6
In this paper, we propose a machine learning (ML) based physical layer receiver solution for demodulating OFDM signals that are subject to a high level of nonlinear distortion. Spe…
Millimeter-wave Mobile Sensing and Environment Mapping: Models, Algorithms and Validation
Carlos Baquero Barneto, Elizaveta Rastorgueva-Foi, Musa Furkan Keskin +5
Integrating efficient connectivity, positioning and sensing functionalities into 5G New Radio (NR) and beyond mobile cellular systems is one timely research paradigm, especially at…
Improved Coefficients for the Karagiannidis-Lioumpas Approximations and Bounds to the Gaussian Q-Function
Islam M. Tanash, Taneli Riihonen
We revisit the Karagiannidis-Lioumpas (KL) approximation of the Q-function by optimizing its coefficients in terms of absolute error, relative error and total error. For minimizing…
Waveforms and End-to-End Efficiency in RF Wireless Power Transfer Using Digital Radio Transmitter
Nachiket Ayir, Taneli Riihonen, Markus Allén +1
We study radio-frequency (RF) wireless power transfer (WPT) using a digital radio transmitter for applications where alternative analog transmit circuits are impractical. An import…
Stochastic Analysis of Satellite Broadband by Mega-Constellations with Inclined LEOs
Niloofar Okati, Taneli Riihonen
As emerging massive constellations are intended to provide seamless connectivity for remote areas using hundreds of small low Earth orbit (LEO) satellites, new methodologies have g…
Global Minimax Approximations and Bounds for the Gaussian Q-Function by Sums of Exponentials
Islam M. Tanash, Taneli Riihonen
This paper presents a novel systematic methodology to obtain new simple and tight approximations, lower bounds, and upper bounds for the Gaussian Q-function, and functions thereof,…
Downlink Coverage and Rate Analysis of Low Earth Orbit Satellite Constellations Using Stochastic Geometry
Niloofar Okati, Taneli Riihonen, Dani Korpi +2
As low Earth orbit (LEO) satellite communication systems are gaining increasing popularity, new theoretical methodologies are required to investigate such networks' performance at…
PAPR Reduction with Mixed-Numerology OFDM
Selahattin Gökceli, Toni Levanen, Juha Yli-Kaakinen +3
High peak-to-average power ratio (PAPR) is a critical problem in orthogonal frequency-division multiplexing (OFDM). The fifth-generation New Radio (5G NR) facilitates the utilizati…
Full-Duplex OFDM Radar With LTE and 5G NR Waveforms: Challenges, Solutions, and Measurements
Carlos Baquero Barneto, Taneli Riihonen, Matias Turunen +5
This paper studies the processing principles, implementation challenges, and performance of OFDM-based radars, with particular focus on the fourth-generation Long-Term Evolution (L…
Frequency-Selective PAPR Reduction for OFDM
Selahattin Gökceli, Toni Levanen, Taneli Riihonen +2
We study the peak-to-average power ratio (PAPR) problem in orthogonal frequency-division multiplexing (OFDM) systems. In conventional clipping and filtering based PAPR reduction te…
Constrained Phase Noise Estimation in OFDM Using Scattered Pilots Without Decision Feedback
Pramod Mathecken, Taneli Riihonen, Stefan Werner +1
In this paper, we consider an OFDM radio link corrupted by oscillator phase noise in the receiver, namely the problem of estimating and compensating for the impairment. To lessen t…