Search Results for author: Erik Leitinger

Found 22 papers, 1 papers with code

MIMO Multipath-based SLAM for Non-Ideal Reflective Surfaces

no code implementations22 Apr 2024 Lukas Wielandner, Alexander Venus, Thomas Wilding, Klaus Witrisal, Erik Leitinger

Multipath-based simultaneous localization and mapping (MP-SLAM) is a well established approach to obtain position information of transmitters and receivers as well as information regarding the propagation environments in future multiple input multiple output (MIMO) communication systems.

Fusion of Active and Passive Measurements for Robust and Scalable Positioning

no code implementations24 Mar 2024 Hong Zhu, Alexander Venus, Erik Leitinger, Stefan Tertinek, Klaus Witrisal

Then, a joint tracking algorithm that utilizes both active and passive measurements is developed for the extended object.

Object

A Belief Propagation Algorithm for Multipath-based SLAM with Multiple Map Features: A mmWave MIMO Application

no code implementations15 Mar 2024 Xuhong LI, Xuesong Cai, Erik Leitinger, Fredrik Tufvesson

We develop a Bayesian model for sequential detection and estimation of interacting MF model parameters, MF states and mobile agent's state including position and orientation.

Simultaneous Localization and Mapping

A Belief Propagation Approach for Direct Multipath-Based SLAM

no code implementations24 Dec 2023 Mingchao Liang, Erik Leitinger, Florian Meyer

This factor graph is the starting point for the development of an efficient belief propagation (BP) method for multipath-based SLAM that directly uses received radio signals as measurements.

Simultaneous Localization and Mapping

Graph-based Simultaneous Localization and Bias Tracking

no code implementations4 Oct 2023 Alexander Venus, Erik Leitinger, Stefan Tertinek, Florian Meyer, Klaus Witrisal

The delay biases of the MPCs capture the geometric features of the propagation environment with respect to the mobile agent.

Position

A Neural-enhanced Factor Graph-based Algorithm for Robust Positioning in Obstructed LOS Situations

no code implementations30 Aug 2023 Alexander Venus, Erik Leitinger, Stefan Tertinek, Klaus Witrisal

This paper presents a neural-enhanced probabilistic model and corresponding factor graph-based sum-product algorithm for robust localization and tracking in multipath-prone environments.

Position

Super-Resolution Estimation of UWB Channels including the Diffuse Component -- An SBL-Inspired Approach

no code implementations3 Aug 2023 Stefan Grebien, Erik Leitinger, Klaus Witrisal, Bernard H. Fleury

Specifically, the algorithm super-resolves the specular components in the delay-angle-of-arrival domain and estimates the parameters of a parametric model of the delay-angle power spectrum characterizing the diffuse component.

Super-Resolution

Fast Variational Block-Sparse Bayesian Learning

1 code implementation1 Jun 2023 Jakob Möderl, Franz Pernkopf, Klaus Witrisal, Erik Leitinger

We present a fast update rule for variational block-sparse Bayesian learning (SBL) methods.

Multipath-based SLAM for Non-Ideal Reflective Surfaces Exploiting Multiple-Measurement Data Association

no code implementations12 Apr 2023 Lukas Wielandner, Alexander Venus, Thomas Wilding, Erik Leitinger

In this paper, we introduce a Bayesian particle-based sum-product algorithm (SPA) for multipath-based SLAM that can cope with multiple-measurements being associated to a single VA.

Simultaneous Localization and Mapping Single Particle Analysis

Variational Inference of Structured Line Spectra Exploiting Group-Sparsity

no code implementations6 Mar 2023 Jakob Möderl, Franz Pernkopf, Klaus Witrisal, Erik Leitinger

The spectral lines in each group are associated with a group parameter common to all spectral lines within the group.

Variational Inference

Message Passing-Based 9-D Cooperative Localization and Navigation with Embedded Particle Flow

no code implementations3 Jan 2023 Lukas Wielandner, Erik Leitinger, Florian Meyer, Klaus Witrisal

However, particle-based BP algorithms are known to suffer from particle degeneracy in large and dense networks of mobile agents with high-dimensional states.

Data Fusion for Multipath-Based SLAM: Combining Information from Multiple Propagation Paths

no code implementations16 Nov 2022 Erik Leitinger, Alexander Venus, Bryan Teague, Florian Meyer

A key aspect of the proposed estimation method based on MVAs is to check the availability of singlebounce and double-bounce propagation paths at a specific agent position by means of ray-launching.

Indoor Localization Simultaneous Localization and Mapping +1

Variational Message Passing-Based Respiratory Motion Estimation and Detection Using Radar Signals

no code implementations14 Oct 2022 Jakob Möderl, Erik Leitinger, Franz Pernkopf, Klaus Witrisal

We present a variational message passing (VMP) approach to detect the presence of a person based on their respiratory chest motion using multistatic ultra-wideband (UWB) radar.

Motion Estimation

A Graph-based Algorithm for Robust Sequential Localization Exploiting Multipath for Obstructed-LOS-Bias Mitigation

no code implementations18 Jul 2022 Alexander Venus, Erik Leitinger, Stefan Tertinek, Klaus Witrisal

This paper presents a factor graph formulation and particle-based sum-product algorithm (SPA) for robust sequential localization in multipath-prone environments.

Position Single Particle Analysis

Data Fusion for Radio Frequency SLAM with Robust Sampling

no code implementations20 Jun 2022 Erik Leitinger, Bryan Teague, Wenyu Zhang, Mingchao Liang, Florian Meyer

A promising approach to address this problem is to exchange radio signals between mobile agents and static physical anchors (PAs) that bounce off flat surfaces in the indoor environment.

Indoor Localization Simultaneous Localization and Mapping

Statistical Modeling of the Human Body as an Extended Antenna

no code implementations25 Mar 2021 Thomas Wilding, Erik Leitinger, Ulrich Muehlmann, Klaus Witrisal

By comparing measurements of the antenna attached directly to the user with measurements for the antenna without the user nearby, we show the shadowing and scattering effects of the human body and the antenna.

Position

RSS-based Cooperative Localization and Orientation Estimation Exploiting Directive Antenna Patterns

no code implementations24 Mar 2021 Lukas Wielandner, Erik Leitinger, Klaus Witrisal

In this paper, we propose a factor-graph-based cooperative positioning algorithm that uses RSS radio measurements and accounts for the directivity of the antennas.

Position

Multipath-based SLAM using Belief Propagation with Interacting Multiple Dynamic Models

no code implementations23 Mar 2021 Erik Leitinger, Stefan Grebien, Klaus Witrisal

In this paper, we present a Bayesian multipath-based simultaneous localization and mapping (SLAM) algorithm that continuously adapts interacting multiple models (IMM) parameters to describe the mobile agent state dynamics.

Simultaneous Localization and Mapping

Deep Convolutional Neural Networks for Massive MIMO Fingerprint-Based Positioning

no code implementations21 Aug 2017 Joao Vieira, Erik Leitinger, Muris Sarajlic, Xuhong Li, Fredrik Tufvesson

This paper provides an initial investigation on the application of convolutional neural networks (CNNs) for fingerprint-based positioning using measured massive MIMO channels.

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