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Supervised training of neural networks for classification is typically performed with a global loss function. The loss function provides a gradient for the output layer, and this gradient is back-propagated to hidden layers to dictate an…

机器学习 · 统计学 2019-05-09 Arild Nøkland , Lars Hiller Eidnes

A successful deep learning network is highly dependent not only on the training dataset, but the training algorithm used to condition the network for a given task. The loss function, dataset, and tuning of hyperparameters all play an…

机器学习 · 计算机科学 2025-10-07 Ashley Lenau , Dennis Dimiduk , Stephen R. Niezgoda

In model-based reinforcement learning, most algorithms rely on simulating trajectories from one-step models of the dynamics learned on data. A critical challenge of this approach is the compounding of one-step prediction errors as the…

机器学习 · 计算机科学 2024-02-06 Abdelhakim Benechehab , Albert Thomas , Giuseppe Paolo , Maurizio Filippone , Balázs Kégl

Vehicular communication systems face significant challenges due to high mobility and rapidly changing environments, which affect the channel over which the signals travel. To address these challenges, neural network (NN)-based channel…

机器学习 · 计算机科学 2025-02-12 Simbarashe Aldrin Ngorima , Albert Helberg , Marelie H. Davel

Road safety mapping using satellite images is a cost-effective but a challenging problem for smart city planning. The scarcity of labeled data, misalignment and ambiguity makes it hard for supervised deep networks to learn efficient…

计算机视觉与模式识别 · 计算机科学 2019-01-29 Sonu Gupta , Deepak Srivatsav , A. V. Subramanyam , Ponnurangam Kumaraguru

Ray tracing (RT) simulations require accurate transmitter (TX) and receiver (RX) location information from real-world measurements to accurately characterize wireless propagation behavior in an environment. Such wireless propagation…

信号处理 · 电气工程与系统科学 2025-09-16 Mingjun Ying , Peijie Ma , Dipankar Shakya , Theodore S. Rappaport

Over the last years, several works have explored the application of deep learning algorithms to determine the large-scale signal fading (also referred to as ``path loss'') between transmitter and receiver pairs in urban communication…

网络与互联网体系结构 · 计算机科学 2024-10-28 Fabian Jaensch , Giuseppe Caire , Begüm Demir

The high overhead of the beam training process is the main challenge when establishing mmWave communication links, especially for vehicle-to-everything (V2X) scenarios where the channels are highly dynamic. In this paper, we obtain prior…

信号处理 · 电气工程与系统科学 2021-11-17 Yun Chen , Andrew Graff , Nuria González-Prelcic , Takayuki Shimizu

This paper addresses the challenges of mobile user requirements in shadowing and multi-fading environments, focusing on the Downlink (DL) radio node selection based on Uplink (UL) channel estimation. One of the key issues tackled in this…

网络与互联网体系结构 · 计算机科学 2024-12-02 Mervat Zarour , Qiuheng Zhou , Sergiy Melnyk , Hans D. Schotten

Convolutional Neural Network (CNN) have been widely used in image classification. Over the years, they have also benefited from various enhancements and they are now considered as state of the art techniques for image like data. However,…

计算机视觉与模式识别 · 计算机科学 2022-06-06 Thomas Gonzalez , Antoine Blais , Nicolas Couëllan , Christian Ruiz

Machine learning algorithms have recently been considered for many tasks in the field of wireless communications. Previously, we have proposed the use of a deep fully convolutional neural network (CNN) for receiver processing and shown it…

信号处理 · 电气工程与系统科学 2022-07-13 Janne M. J. Huttunen , Dani Korpi , Mikko Honkala

This paper studies the fast adaptive beamforming for the multiuser multiple-input single-output downlink. Existing deep learning-based approaches assume that training and testing channels follow the same distribution which causes task…

信息论 · 计算机科学 2021-09-21 Juping Zhang , Yi Yuan , Gan Zheng , Ioannis Krikidis , Kai-Kit Wong

In many spatial trajectory-based applications, it is necessary to map raw trajectory data points onto road networks in digital maps, which is commonly referred to as a map-matching process. While most previous map-matching methods have…

机器学习 · 计算机科学 2023-08-15 Zhixiong Jin , Jiwon Kim , Hwasoo Yeo , Seongjin Choi

Identifying the obstacle space is crucial for path planning. However, generating an accurate obstacle space remains a significant challenge due to various sources of uncertainty, including motion, behavior, and perception limitations. Even…

机器人学 · 计算机科学 2025-09-30 Jun Xiang , Jun Chen

Sampling-based motion planning is a well-established approach in autonomous driving, valued for its modularity and analytical tractability. In complex urban scenarios, however, uniform or heuristic sampling often produces many infeasible or…

机器人学 · 计算机科学 2026-03-24 Korbinian Moller , Roland Stroop , Mattia Piccinini , Alexander Langmann , Johannes Betz

Uplink sensing in perceptive mobile networks (PMNs), which uses uplink communication signals for sensing the environment around a base station, faces challenging issues of clock asynchronism and the requirement of a line-of-sight (LOS) path…

信息论 · 计算机科学 2022-11-08 Zhitong Ni , J. Andrew Zhang , Kai Wu , Ren Ping Liu

Existing cellular network analyses, and even simulations, typically use the standard path loss model where received power decays like $\|x\|^{-\alpha}$ over a distance $\|x\|$. This standard path loss model is quite idealized, and in most…

信息论 · 计算机科学 2015-03-17 Xinchen Zhang , Jeffrey G. Andrews

The ability to automatically detect other vehicles on the road is vital to the safety of partially-autonomous and fully-autonomous vehicles. Most of the high-accuracy techniques for this task are based on R-CNN or one of its faster…

计算机视觉与模式识别 · 计算机科学 2016-06-07 Khalid Ashraf , Bichen Wu , Forrest N. Iandola , Mattthew W. Moskewicz , Kurt Keutzer

Graph neural networks use relational information as an inductive bias to enhance prediction performance. Not rarely, task-relevant relations are unknown and graph structure learning approaches have been proposed to learn them from data.…

机器学习 · 计算机科学 2025-05-29 Alessandro Manenti , Daniele Zambon , Cesare Alippi

Graph neural networks (GNNs) is widely used to learn a powerful representation of graph-structured data. Recent work demonstrates that transferring knowledge from self-supervised tasks to downstream tasks could further improve graph…

机器学习 · 计算机科学 2021-07-21 Xueting Han , Zhenhuan Huang , Bang An , Jing Bai