Search Results for author: Takayuki Shimizu

Found 11 papers, 1 papers with code

OOSTraj: Out-of-Sight Trajectory Prediction With Vision-Positioning Denoising

1 code implementation2 Apr 2024 Haichao Zhang, Yi Xu, HongSheng Lu, Takayuki Shimizu, Yun Fu

By enhancing trajectory prediction accuracy and addressing the challenges of out-of-sight objects, our work significantly contributes to improving the safety and reliability of autonomous driving in complex environments.

Autonomous Driving Decision Making +2

Layout Sequence Prediction From Noisy Mobile Modality

no code implementations9 Oct 2023 Haichao Zhang, Yi Xu, HongSheng Lu, Takayuki Shimizu, Yun Fu

In summary, our approach offers a promising solution to the challenges faced by layout sequence and trajectory prediction models in real-world settings, paving the way for utilizing sensor data from mobile phones to accurately predict pedestrian bounding box trajectories.

Autonomous Driving Denoising +1

Sparse Recovery with Attention: A Hybrid Data/Model Driven Solution for High Accuracy Position and Channel Tracking at mmWave

no code implementations26 Aug 2023 Yun Chen, Nuria González-Prelcic, Takayuki Shimizu, Hongshen Lu, Chinmay Mahabal

In this paper, we propose first a mmWave channel tracking algorithm based on multidimensional orthogonal matching pursuit algorithm (MOMP) using reduced sparsifying dictionaries, which exploits information from channel estimates in previous frames.

Position

Learning to Localize with Attention: from sparse mmWave channel estimates from a single BS to high accuracy 3D location

no code implementations30 Jun 2023 Yun Chen, Nuria González-Prelcic, Takayuki Shimizu, HongSheng Lu

One strategy to obtain user location information in a wireless network operating at millimeter wave (mmWave) is based on the exploitation of the geometric relationships between the channel parameters and the user position.

Position

Enabling NLoS LEO Satellite Communications with Reconfigurable Intelligent Surfaces

no code implementations31 May 2022 Xiaowen Tian, Nuria Gonzalez-Prelcic, Takayuki Shimizu

In this paper, we propose to enable LEO SatCom in non-line-of-sight (NLoS) channels, as those corresponding to links to users in urban canyons, with the aid of reconfigurable intelligent surfaces (RISs).

Joint Initial Access and Localization in Millimeter Wave Vehicular Networks: a Hybrid Model/Data Driven Approach

no code implementations4 Apr 2022 Yun Chen, Joan Palacios, Nuria González-Prelcic, Takayuki Shimizu, HongSheng Lu

High resolution compressive channel estimation provides information for vehicle localization when a hybrid mmWave MIMO system is considered.

Deep Learning-based Link Configuration for Radar-aided Multiuser mmWave Vehicle-to-Infrastructure Communication

no code implementations12 Jan 2022 Andrew Graff, Yun Chen, Nuria González-Prelcic, Takayuki Shimizu

Then, a deep network is used to translate features of these radar spatial covariances into features of the communication spatial covariances, by learning the intricate mapping between radar and communication channels, in both line-of-sight and non-line-of-sight settings.

Radar Aided mmWave Vehicle-to-InfrastructureLink Configuration Using Deep Learning

no code implementations16 Nov 2021 Yun Chen, Andrew Graff, Nuria González-Prelcic, Takayuki Shimizu

In this paper, we obtain prior information to speed up the beam training process by implementing two deep neural networks (DNNs) that realize radar-to-communication (R2C) channel information translation in a vehicle-to-infrastructure (V2I) system.

A Dynamic Codebook Design for Analog Beamforming in MIMO LEO Satellite Communications

no code implementations16 Nov 2021 Joan Palacios, Nuria González-Prelcic, Carlos Mosquera, Takayuki Shimizu

Beamforming gain is a key ingredient in the performance of LEO satellite communication systems to be integrated into cellular networks.

A hybrid beamforming design for massive MIMO LEO satellite communications

no code implementations22 Apr 2021 Joan Palacios, Nuria Gonzalez-Prelcic, Carlos Mosquera, Takayuki Shimizu, Chang-Heng Wang

5G and future cellular networks intend to incorporate low earth orbit (LEO) satellite communication systems (SatCom) to solve the coverage and availability problems that cannot be addressed by satellite-based or ground-based infrastructure alone.

Securing Vehicle-to-Everything (V2X) Communication Platforms

no code implementations12 Mar 2020 Monowar Hasan, Sibin Mohan, Takayuki Shimizu, HongSheng Lu

Modern vehicular wireless technology enables vehicles to exchange information at any time, from any place, to any network -- forms the vehicle-to-everything (V2X) communication platforms.

Networking and Internet Architecture Cryptography and Security

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