Search Results for author: Angela Doufexi

Found 11 papers, 0 papers with code

Joint User Scheduling, Power Allocation, and Rate Control for MC-RSMA in URLLC Services

no code implementations29 Dec 2023 Xiaoyu Ou, Shuping Dang, Zhihan Ren, Angela Doufexi

Specifically, for a given user grouping scheme, an iteration-based concave-convex programming (CCCP) method and an iteration-free lower-bound approximation (LBA) method are proposed for power allocation and rate control.

Management

Integer-Based Pattern Synthesis for Asymmetric Multi-Reflection RIS

no code implementations28 Dec 2023 Wei Wang, Angela Doufexi, Mark A Beach

This study delves into the radiation pattern synthesis of reconfigurable intelligent surfaces (RIS) / reflection metasurfaces.

DRL-Based Sidelobe Suppression for Multi-focus Reconfigurable Intelligent Surface

no code implementations24 Dec 2023 Wei Wang, Peizheng Li, Angela Doufexi, Mark A Beach

Reconfigurable intelligent surface (RIS) technology is receiving significant attention as a key enabling technology for 6G communications, with much attention given to coverage infill and wireless power transfer.

A DRL-based Reflection Enhancement Method for RIS-assisted Multi-receiver Communications

no code implementations11 Sep 2023 Wei Wang, Peizheng Li, Angela Doufexi, Mark A Beach

In reconfigurable intelligent surface (RIS)-assisted wireless communication systems, the pointing accuracy and intensity of reflections depend crucially on the 'profile,' representing the amplitude/phase state information of all elements in a RIS array.

Sim2real for Reinforcement Learning Driven Next Generation Networks

no code implementations8 Jun 2022 Peizheng Li, Jonathan Thomas, Xiaoyang Wang, Hakan Erdol, Abdelrahim Ahmad, Rui Inacio, Shipra Kapoor, Arjun Parekh, Angela Doufexi, Arman Shojaeifard, Robert Piechocki

One of the main reasons is the modelling gap between the simulation and the real environment, which could make the RL agent trained by simulation ill-equipped for the real environment.

Data Interaction reinforcement-learning +1

RLOps: Development Life-cycle of Reinforcement Learning Aided Open RAN

no code implementations12 Nov 2021 Peizheng Li, Jonathan Thomas, Xiaoyang Wang, Ahmed Khalil, Abdelrahim Ahmad, Rui Inacio, Shipra Kapoor, Arjun Parekh, Angela Doufexi, Arman Shojaeifard, Robert Piechocki

We provide a taxonomy for the challenges faced by ML/RL models throughout the development life-cycle: from the system specification to production deployment (data acquisition, model design, testing and management, etc.).

Management reinforcement-learning +1

Deep Transfer Learning for WiFi Localization

no code implementations8 Mar 2021 Peizheng Li, Han Cui, Aftab Khan, Usman Raza, Robert Piechocki, Angela Doufexi, Tim Farnham

Finally, an ablation study of the training dataset shows that, in both office and sport hall scenarios, after reusing the feature extraction layers of the base model, only 55% of the training data is required to obtain the models' accuracy similar to the base models.

Transfer Learning

Non-Asymptotic Converse Bounds Via Auxiliary Channels

no code implementations27 Jan 2021 Ioannis Papoutsidakis, Robert J. Piechocki, Angela Doufexi

This paper presents a new derivation method of converse bounds on the non-asymptotic achievable rate of discrete weakly symmetric memoryless channels.

Information Theory Information Theory

Wireless Localisation in WiFi using Novel Deep Architectures

no code implementations16 Oct 2020 Peizheng Li, Han Cui, Aftab Khan, Usman Raza, Robert Piechocki, Angela Doufexi, Tim Farnham

Meanwhile, using a well-organised architecture, the neural network models can be trained directly with raw data from the CSI and localisation features can be automatically extracted to achieve accurate position estimates.

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