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In time-varying fading channels, channel coefficients are estimated using pilot symbols that are transmitted every coherence interval. For channels with high Doppler spread, the rapid channel variations over time will require considerable…

信息论 · 计算机科学 2022-03-24 Sandesh Rao Mattu , Lakshmi Narasimhan T , A. Chockalingam

We consider the problem of uplink timing synchronization for Orthogonal Time Frequency Space (OTFS) modulation based systems where information is embedded in the delay-Doppler (DD) domain. For this, we propose a novel Random Access (RA)…

信息论 · 计算机科学 2021-04-08 Alok Kumar Sinha , Saif Khan Mohammed , P. Raviteja , Yi Hong , Emanuele Viterbo

This paper proposes a centralized predictive flow controller to handle multi-connectivity for ultra-reliable low latency communication (URLLC) services. The prediction is based on channel state information (CSI) and buffer state reports…

信息论 · 计算机科学 2019-07-03 David Guzman , Richard Schoeffauer , Gerhard Wunder

RISC-V-based architectures are paving the way for efficient On-Device Learning (ODL) in smart edge devices. When applied across multiple nodes, ODL enables the creation of intelligent sensor networks that preserve data privacy. However,…

机器学习 · 计算机科学 2025-04-23 Lars Kröger , Cristian Cioflan , Victor Kartsch , Luca Benini

The dynamic scheduling of ultra-reliable and low-latency traffic (URLLC) in the uplink can significantly enhance the efficiency of coexisting services, such as enhanced mobile broadband (eMBB) devices, by only allocating resources when…

信号处理 · 电气工程与系统科学 2024-05-02 Kfir M. Cohen , Sangwoo Park , Osvaldo Simeone , Petar Popovski , Shlomo Shamai

The OTFS (Orthogonal Time Frequency Space) is widely acknowledged for its ability to combat Doppler spread in time-varying channels. In this paper, another advantage of OTFS over OFDM (Orthogonal Frequency Division Multiplexing) will be…

信号处理 · 电气工程与系统科学 2024-08-20 Zijun Gong , Fan Jiang , Yuhui Song , Cheng Li , Xiaofeng Tao

Due to strict rate and reliability demands, wireless image transmission remains difficult for both classical layered designs and joint source-channel coding (JSCC), especially under low latency. Diffusion-based generative decoders can…

机器学习 · 计算机科学 2026-01-13 Jingwen Fu , Ming Xiao , Mikael Skoglund , Dong In Kim

While Large Language Models (LLMs) demonstrate exceptional performance in surface-level text generation, their nature in handling complex multi-step reasoning tasks often remains one of ``statistical fitting'' rather than systematic logical…

机器学习 · 计算机科学 2026-01-27 Lianlei Shan , Han Chen , Yixuan Wang , Zhenjie Liu , Wei Li

To date, model-based reliable communication with low latency is of paramount importance for time-critical wireless control systems. In this work, we study the downlink (DL) controller-to-actuator scheduling problem in a wireless industrial…

网络与互联网体系结构 · 计算机科学 2020-05-12 Chen-Feng Liu , Mehdi Bennis

Modern 5G communication systems employ multiple-input multiple-output (MIMO) in conjunction with orthogonal frequency division multiplexing (OFDM) to enhance data rates, particularly for wideband millimetre wave (mmW) applications. Since…

信号处理 · 电气工程与系统科学 2023-03-21 Parth Mehta , Agulla Surya Bharath , Kumar Appaiah , Rajbabu Velmurugan , Debasattam Pal

Orthogonal time frequency space (OTFS) modulation offers superior robustness to high-mobility channels compared to conventional orthogonal frequency-division multiplexing (OFDM) waveforms. However, its explicit delay-Doppler (DD) domain…

信号处理 · 电气工程与系统科学 2026-04-03 Junyao Zheng , Chung-Hsuan Tung , Yuncheng Yao , Nishant Mehrotra , Sandesh Mattu , Zhenzhou Qi , Danyang Zhuo , Robert Calderbank , Tingjun Chen

The standardization of the sixth-generation (6G) has recently commenced to address the rapidly growing demands for enhanced wireless network services. Nevertheless, existing wireless systems, particularly at the physical layer waveform…

Orthogonal time frequency space (OTFS) technique is a two-dimensional modulation method that multiplexes information symbols in the delay-Doppler (DD) domain. OTFS combats high Doppler shift existing in high speed wireless communication.…

信息论 · 计算机科学 2026-02-18 Omid Abbassi Aghda , Mohammad Javad Omidi , Hamid Saeedi-Sourck

This paper proposes an off-grid channel estimation scheme for orthogonal time-frequency space (OTFS) systems adopting the sparse Bayesian learning (SBL) framework. To avoid channel spreading caused by the fractional delay and Doppler shifts…

信息论 · 计算机科学 2021-01-15 Zhiqiang Wei , Weijie Yuan , Shuangyang Li , Jinhong Yuan , Derrick Wing Kwan Ng

Ultra-reliable wireless communication links require the utilization of all diversity sources of a wireless communication channel. Hadani et al. propose a two dimensional discrete symplectic Fourier transform (DSFT) as orthogonal pre-coder…

信息论 · 计算机科学 2019-07-24 Thomas Zemen , Markus Hofer , David Loeschenbrand , Christoph Pacher

The integration of low earth orbit (LEO) satellites with terrestrial communication networks holds the promise of seamless global connectivity. The efficiency of this connection, however, depends on the availability of reliable channel state…

信号处理 · 电气工程与系统科学 2025-05-13 Yasaman Omid , Marios Aristodemou , Sangarapillai Lambotharan , Mahsa Derakhshani , Lajos Hanzo

Model Predictive Control (MPC) is a powerful strategy for constrained multivariable systems but faces computational challenges in real-time deployment due to its online optimization requirements. While explicit MPC and neural network…

最优化与控制 · 数学 2025-12-18 Jiayang Ren , Qiangqiang Mao , Tianwei Zhao , Yankai Cao

In this paper, we present a downlink pilot design scheme for Deep Learning (DL) based channel estimation (ChannelNet) in orthogonal frequency-division multiplexing (OFDM) systems. Specifically, in the proposed scheme, a feature selection…

信号处理 · 电气工程与系统科学 2020-03-23 Mehran Soltani , Vahid Pourahmadi , Hamid Sheikhzadeh

Opportunistic Networks (OppNets) employ the Store-Carry-Forward (SCF) paradigm to maintain communication during intermittent connectivity. However, routing performance suffers due to dynamic topology changes, unpredictable contact patterns,…

网络与互联网体系结构 · 计算机科学 2026-02-18 Meisam Sharifi Sani , Saeid Iranmanesh , Raad Raad , Faisel Tubbal

Recent research in the design of end to end communication system using deep learning has produced models which can outperform traditional communication schemes. Most of these architectures leveraged autoencoders to design the encoder at the…

信息论 · 计算机科学 2020-01-28 Vishnu Raj , Sheetal Kalyani
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