Search Results for author: Julian Cheng

Found 15 papers, 2 papers with code

Optimizing Smart Helper Placement for Enhanced Cache Efficiency in F-RANs

no code implementations28 Jan 2025 Hesameddin Mokhtarzadeh, Mohammed Saif, Md. Jahangir Hossain, Julian Cheng

We model the SH cache hit rate as a function of outage probability and user density distribution.

Path Loss Modeling for NLoS Ultraviolet Channels Incorporating Scattering and Reflection Effects

no code implementations8 Nov 2024 Tianfeng Wu, Fang Yang, Fei Li, Renzhi Yuan, Tian Cao, Ling Cheng, Jian Song, Julian Cheng, Zhu Han

This paper tackles limitations in existing non-line-of-sight (NLoS) ultraviolet (UV) channel models, where conventional approaches assume obstacle-free propagation or uniform radiation intensity.

CubeSat-Enabled Free-Space Optics: Joint Data Communication and Fine Beam Tracking

no code implementations13 Jun 2024 Hossein Safi, Mohammad Taghi Dabiri, Julian Cheng, Iman Tavakkolnia, Harald Haas

We also utilize combining methods such as equal gain combining (EGC) and maximal ratio combining (MRC) for data detection, benchmarking their performance against the GLRT-based method.

Benchmarking

Positioning Using Wireless Networks: Applications, Recent Progress and Future Challenges

no code implementations18 Mar 2024 Yang Yang, Mingzhe Chen, Yufei Blankenship, Jemin Lee, Zabih Ghassemlooy, Julian Cheng, Shiwen Mao

The purpose of this paper is to provide a comprehensive overview of existing works and new trends in the field of positioning techniques from both the academic and industrial perspectives.

Ultrasonic Backscatter Communication for Implantable Medical Devices

no code implementations14 Feb 2022 Qianqian Wang, Quansheng Guan, Julian Cheng, Yuankun Tang

The tag backscatters the pulses based on the piezoelectric effect of a piezo transducer.

TAG

Quantum Discrimination of Two Noisy Displaced Number States

no code implementations9 Dec 2020 Renzhi Yuan, Julian Cheng

The quantum discrimination of two non-coherent states draws much attention recently.

Quantum Physics Signal Processing

Deep Unfolding Basis Pursuit: Improving Sparse Channel Reconstruction via Data-Driven Measurement Matrices

2 code implementations10 Jul 2020 Pengxia Wu, Julian Cheng

Moreover, compared with existing pure deep learning-based sparse reconstruction methods, the proposed hybrid data-driven scheme, which uses the novel data-driven measurement matrices with conventional sparse reconstruction algorithms, can achieve higher reconstruction accuracy.

Compressive Sensing

Free-Space Optical Communication Using Non-mode-Selective Photonic Lantern Based Coherent Receiver

no code implementations3 Jul 2020 Bo Zhang, Renzhi Yuan, Jianfeng Sun, Julian Cheng, Mohamed-Slim Alouini

A free-space optical communication system using non-mode-selective photonic lantern (PL) based coherent receiver is studied.

Communication-Efficient Robust Federated Learning Over Heterogeneous Datasets

no code implementations17 Jun 2020 Yanjie Dong, Georgios B. Giannakis, Tianyi Chen, Julian Cheng, Md. Jahangir Hossain, Victor C. M. Leung

For strongly convex loss functions, FRPG and LFRPG have provably faster convergence rates than a benchmark robust stochastic aggregation algorithm.

Federated Learning

Analytical Channel Model and Link Design Optimization for Ground-to-HAP Free-Space Optical Communication Networks

no code implementations24 May 2020 Hossein Safi, Akbar Dargahi, Julian Cheng, Majid Safari

Furthermore, closed-form expressions for the outage probability of the considered link under different turbulence regimes are derived.

Secure Distributed On-Device Learning Networks With Byzantine Adversaries

no code implementations3 Jun 2019 Yanjie Dong, Julian Cheng, Md. Jahangir Hossain, Victor C. M. Leung

The worst-case malfunctioning terminals are the Byzantine adversaries, that can perform arbitrary harmful operations to compromise the learned model based on the full knowledge of the networks.

Federated Learning Privacy Preserving

Power Allocation in Multi-User Cellular Networks: Deep Reinforcement Learning Approaches

1 code implementation22 Jan 2019 Fan Meng, Peng Chen, Lenan Wu, Julian Cheng

The model-based power allocation algorithm has been investigated for decades, but it requires the mathematical models to be analytically tractable and it usually has high computational complexity.

Information Theory Information Theory

Data-Rate Driven Transmission Strategy for Deep Learning Based Communication Systems

no code implementations20 Dec 2018 Xiao Chen, Julian Cheng, Zaichen Zhang, Liang Wu, Jian Dang

The GDR scheme can achieve higher data rate than the conventional one-hot vector scheme with comparable BLER performance.

Information Theory Information Theory

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