activity
20202026
most citedFrom OTFS to AFDM: A Comparative Study of Next-Generation Waveforms for ISAC in Doubly-Dispersive Channels

93 citations · 96 across the 16 of their papers we have counts for

collaborators

17 papers

eess.SP2026

Rigid Body Localization via Gaussian Belief Propagation with Quadratic Angle Approximation

Niclas Führling, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu +2

Gaussian belief propagation (GaBP) is a technique that relies on linearized error and input output models to yield low-complexity solutions to complex estimation problems, which ha…

eess.SP2025

SMDS-based Rigid Body Localization

Niclas Führling, Giuseppe Abreu, David González G. +1

We consider a novel rigid body localization (RBL) method, based only on a set of measurements of the distances, as well as the angles between sensors of the vehicle to the anchor l…

eess.SP2025

Rigid Body Localization and Tracking for 6G V2X: Algorithms, Applications, and Road to Adoption

Niclas Führling, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu +3

Vehicle-to-everything (V2X) perception refers to a suite of technologies that empower vehicles to sense their environment and communicate with other entities, including surrounding…

eess.SP2025

Fundamental Limits of Rigid Body Localization

Niclas Führling, Ivan Alexander Morales Sandoval, Giuseppe Thadeu Freitas de Abreu +3

We consider a novel and general approach to easily compute the Cramér-Rao Lower Bounds (CRLBs) of rigid body localization (RBL) problem using arbitrary types of information. To tha…

cs.RO2025

Egoistic MDS-based Rigid Body Localization

Niclas Führling, Giuseppe Abreu, David González G. +1

We consider a novel anchorless rigid body localization (RBL) suitable for application in autonomous driving (AD), in so far as the algorithm enables a rigid body to egoistically de…

eess.SP2025★ 1 cited

Robust Egoistic Rigid Body Localization

Niclas Führling, Giuseppe Thadeu Freitas de Abreu, David González G. +1

We consider a robust and self-reliant (or "egoistic") variation of the rigid body localization (RBL) problem, in which a primary rigid body seeks to estimate the pose (i.e., locati…

eess.SP2024

6D Rigid Body Localization and Velocity Estimation via Gaussian Belief Propagation

Niclas Führling, Volodymyr Vizitiv, Kuranage Roche Rayan Ranasinghe +4

We propose a novel message-passing solution to the sixth-dimensional (6D) moving rigid body localization (RBL) problem, in which the three-dimensional (3D) translation vector and r…

eess.SP2024★ 1 cited

Enabling Next-Generation V2X Perception: Wireless Rigid Body Localization and Tracking

Niclas Führling, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu +2

Vehicle-to-everything (V2X) perception describes a suite of technologies used to enable vehicles to perceive their surroundings and communicate with various entities, such as other…

eess.SP2024

Enabling Massive Index Modulation Systems via Combinatorics-Free Detection

Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Takumi Takahashi +2

Index modulation (IM) is one of the key enabling technologies for beyond fifth generation (B5G) and sixth generation (6G) wireless systems, attracting attention for its inherent en…

eess.SP2024

Discrete Aware Matrix Completion via Convexized -Norm Approximation

Niclas Führling, Kengo Ando, Giuseppe Thadeu Freitas de Abreu +2

We consider a novel algorithm, for the completion of partially observed low-rank matrices in a structured setting where each entry can be chosen from a finite discrete alphabet set…

eess.SP2024★ 93 cited

From OTFS to AFDM: A Comparative Study of Next-Generation Waveforms for ISAC in Doubly-Dispersive Channels

Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Junil Choi +4

Next-generation wireless systems will offer integrated sensing and communications (ISAC) functionalities not only in order to enable new applications, but also as a means to mitiga…

eess.SP2023

Enabling Energy-Efficiency in Massive-MIMO: A Scalable Low-Complexity Decoder for Generalized Quadrature Spatial Modulation

Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, David González G. +1

Generalized quadrature spatial modulation (GQSM) schemes are known to achieve high energy- and spectral- efficiencies by modulating information both in transmitted symbols and in c…

eess.SP2023

Soft-connected Rigid Body Localization: State-of-the-Art and Research Directions for 6G

Niclas Führling, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu +2

This white paper describes a proposed article that will aim to provide a thorough study of the evolution of the typical paradigm of wireless localization (WL), which is based on a…

eess.SP2023

Sparse Codesigned Communication and Radar Systems

Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Saravanan Nagesh +4

In the envisioned beyond-fifth-generation (B5G) and sixth-generation (6G) scenarios which expect massive multiple-input multiple-output (mMIMO) and high frequency communications in…

eess.SP2023★ 1 cited

AFDM vs OTFS: A Comparative Study of Promising Waveforms for ISAC in Doubly-Dispersive Channels

Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Junil Choi +4

**PLEASE FIND THE FULL EXTENDED ARTICLE "From OTFS to AFDM: A Comparative Study of Next-Generation Waveforms for ISAC in Doubly-Dispersive Channels" (Accepted for publication at th…

eess.SP2023

Integrated Sensing and Communications for 3D Object Imaging via Bilinear Inference

Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, David González G. +1

We consider an uplink integrated sensing and communications (ISAC) scenario where the detection of data symbols from multiple user equipment (UEs) occurs simultaneously with a thre…

eess.SP2020

Robust Symbol Detection in Overloaded NOMA Systems

Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Hara Takanori +5

We present a framework for the design of low-complexity and high-performance receivers for multidimensional overloaded NOMA systems. The framework is built upon a novel compressive…