Search Results for author: Olav Tirkkonen

Found 10 papers, 0 papers with code

Representation-Constrained Autoencoders and an Application to Wireless Positioning

no code implementations ICLR 2019 Pengzhi Huang, Emre Gonultas, Said Medjkouh, Oscar Castaneda, Olav Tirkkonen, Tom Goldstein, Christoph Studer

In a number of practical applications that rely on dimensionality reduction, the dataset or measurement process provides valuable side information that can be incorporated when learning low-dimensional embeddings.

Dimensionality Reduction

Model-based Deep Learning for Beam Prediction based on a Channel Chart

no code implementations4 Dec 2023 Taha Yassine, Baptiste Chatelier, Vincent Corlay, Matthieu Crussière, Stephane Paquelet, Olav Tirkkonen, Luc Le Magoarou

In non-standalone or cell-free systems, chart locations computed at a given base station can be transmitted to several other base stations (possibly operating at different frequency bands) for them to predict which beams to use.

Management

Wireless Channel Charting: Theory, Practice, and Applications

no code implementations17 Apr 2023 Paul Ferrand, Maxime Guillaud, Christoph Studer, Olav Tirkkonen

Channel charting is a recently proposed framework that applies dimensionality reduction to channel state information (CSI) in wireless systems with the goal of associating a pseudo-position to each mobile user in a low-dimensional space: the channel chart.

Dimensionality Reduction Position

Channel Charting Aided Pilot Reuse for Massive MIMO Systems with Spatially Correlated Channels

no code implementations13 Mar 2022 Lucas Ribeiro, Markus Leinonen, Hanan Al-Tous, Olav Tirkkonen, Markku Juntti

Massive multiple-input multiple-output (mMIMO) technology is a way to increase the spectral efficiency of machine-type communications (MTC).

Exploiting Spatial Correlation for Pilot Reuse in Single-Cell mMTC

no code implementations24 Apr 2021 Lucas Ribeiro, Markus Leinonen, Hanan Al-Tous, Olav Tirkkonen, Markku Juntti

This work addresses the design of channel features from correlated fading channels to assist the pilot assignment in multi-sector mMTC systems under pilot reuse of orthogonal sequences.

Binary Subspace Chirps

no code implementations24 Feb 2021 Tefjol Pllaha, Olav Tirkkonen, Robert Calderbank

We describe in details the interplay between binary symplectic geometry and quantum computation, with the ultimate goal of constructing highly structured codebooks.

Information Theory Information Theory

A Big Data Enabled Channel Model for 5G Wireless Communication Systems

no code implementations28 Feb 2020 Jie Huang, Cheng-Xiang Wang, Lu Bai, Jian Sun, Yang Yang, Jie Li, Olav Tirkkonen, Ming-Tuo Zhou

This paper investigates various applications of big data analytics, especially machine learning algorithms in wireless communications and channel modeling.

BIG-bench Machine Learning

Siamese Neural Networks for Wireless Positioning and Channel Charting

no code implementations29 Sep 2019 Eric Lei, Oscar Castañeda, Olav Tirkkonen, Tom Goldstein, Christoph Studer

In this paper, we propose a unified architecture based on Siamese networks that can be used for supervised UE positioning and unsupervised channel charting.

Dimensionality Reduction

Improving Channel Charting with Representation-Constrained Autoencoders

no code implementations7 Aug 2019 Pengzhi Huang, Oscar Castañeda, Emre Gönültaş, Saïd Medjkouh, Olav Tirkkonen, Tom Goldstein, Christoph Studer

Channel charting (CC) has been proposed recently to enable logical positioning of user equipments (UEs) in the neighborhood of a multi-antenna base-station solely from channel-state information (CSI).

Dimensionality Reduction

Channel Charting: Locating Users within the Radio Environment using Channel State Information

no code implementations13 Jul 2018 Christoph Studer, Saïd Medjkouh, Emre Gönültaş, Tom Goldstein, Olav Tirkkonen

We propose channel charting (CC), a novel framework in which a multi-antenna network element learns a chart of the radio geometry in its surrounding area.

Dimensionality Reduction Scheduling

Cannot find the paper you are looking for? You can Submit a new open access paper.