Search Results for author: Chao-Kai Wen

Found 32 papers, 3 papers with code

Auto-CsiNet: Scenario-customized Automatic Neural Network Architecture Generation for Massive MIMO CSI Feedback

no code implementations27 Nov 2023 Xiangyi Li, Jiajia Guo, Chao-Kai Wen, Shi Jin

This paper proposes using neural architecture search (NAS) to automate the generation of scenario-customized CSI feedback NN architectures, thereby maximizing the potential of deep learning in exclusive environments.

Neural Architecture Search

Low-Complexity Joint Beamforming for RIS-Assisted MU-MISO Systems Based on Model-Driven Deep Learning

no code implementations26 Nov 2023 Weijie Jin, Jing Zhang, Chao-Kai Wen, Shi Jin, Xiao Li, Shuangfeng Han

Reconfigurable intelligent surfaces (RIS) can improve signal propagation environments by adjusting the phase of the incident signal.

Stochastic Optimization

Semantic Communications using Foundation Models: Design Approaches and Open Issues

no code implementations23 Sep 2023 Peiwen Jiang, Chao-Kai Wen, Xinping Yi, Xiao Li, Shi Jin, Jun Zhang

Foundation models (FMs), including large language models, have become increasingly popular due to their wide-ranging applicability and ability to understand human-like semantics.

Gradient-Based Markov Chain Monte Carlo for MIMO Detection

no code implementations12 Aug 2023 Xingyu Zhou, Le Liang, Jing Zhang, Chao-Kai Wen, Shi Jin

However, optimal MIMO detection is associated with a complexity that grows exponentially with the MIMO dimensions and quickly becomes impractical.

Bayesian Inference

RIS-Enhanced Semantic Communications Adaptive to User Requirements

no code implementations30 Jul 2023 Peiwen Jiang, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

Simulation results demonstrate the adaptability and efficiency of the RIS-SC framework across diverse channel conditions and user requirements.

Communication-efficient Personalized Federated Edge Learning for Massive MIMO CSI Feedback

no code implementations24 Mar 2023 Yiming Cui, Jiajia Guo, Chao-Kai Wen, Shi Jin

Additionally, since the heterogeneity of CSI datasets in different UEs can degrade the performance of the FEEL-based framework, we introduce a personalization strategy to improve feedback performance.

Lightweight Neural Network with Knowledge Distillation for CSI Feedback

no code implementations31 Oct 2022 Yiming Cui, Jiajia Guo, Zheng Cao, Huaze Tang, Chao-Kai Wen, Shi Jin, Xin Wang, Xiaolin Hou

Firstly, an autoencoder KD-based method is introduced by training a student autoencoder to mimic the reconstructed CSI of a pretrained teacher autoencoder.

Knowledge Distillation

Wireless Semantic Transmission via Revising Modules in Conventional Communications

no code implementations2 Oct 2022 Peiwen Jiang, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

Therefore, the novel semantic-based coding methods and performance metrics have been investigated and the designed semantic systems consist of various modules as in the conventional communications but with improved functions.

AI for CSI Feedback Enhancement in 5G-Advanced

no code implementations30 Jun 2022 Jiajia Guo, Chao-Kai Wen, Shi Jin, Xiao Li

This article provides a guideline for the standardization study of AI-based CSI feedback enhancement.

Overview of Deep Learning-based CSI Feedback in Massive MIMO Systems

no code implementations29 Jun 2022 Jiajia Guo, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

Many performance gains achieved by massive multiple-input and multiple-output depend on the accuracy of the downlink channel state information (CSI) at the transmitter (base station), which is usually obtained by estimating at the receiver (user terminal) and feeding back to the transmitter.

Multi-task Learning-based CSI Feedback Design in Multiple Scenarios

no code implementations27 Apr 2022 Xiangyi Li, Jiajia Guo, Chao-Kai Wen, Shi Jin, Shuangfeng Han, XiaoYun Wang

One efficient CSI feedback method is the Auto-Encoder (AE) structure based on deep learning, yet facing problems in actual deployments, such as selecting the deployment mode when deploying in a cell with multiple complex scenarios.

Multi-Task Learning

Wireless Semantic Communications for Video Conferencing

no code implementations16 Apr 2022 Peiwen Jiang, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

In this paper, we initially establish a basal semantic video conferencing (SVC) network, which dramatically reduces transmission resources while only losing detailed expressions.

Video Compression

Deep Source-Channel Coding for Sentence Semantic Transmission with HARQ

no code implementations6 Jun 2021 Peiwen Jiang, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

Even if semantic communication has been successfully applied in the sentence transmission to reduce semantic errors, existing architecture is usually fixed in the codeword length and is inefficient and inflexible for the varying sentence length.

Sentence

Deep Learning-based Implicit CSI Feedback in Massive MIMO

no code implementations21 May 2021 Muhan Chen, Jiajia Guo, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li, Ang Yang

By using environment information, the NNs can achieve a more refined mapping between the precoding matrix and the PMI compared with codebooks.

Adaptive Channel Estimation Based on Model-Driven Deep Learning for Wideband mmWave Systems

no code implementations28 Apr 2021 Weijie Jin, Hengtao He, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

Channel estimation in wideband millimeter-wave (mmWave) systems is very challenging due to the beam squint effect.

Fast Antenna and Beam Switching Method for mmWave Handsets with Hand Blockage

no code implementations15 Mar 2021 Wan-Ting Shih, Chao-Kai Wen, Shang-Ho, Tsai, Shi Jin

In this method, only one antenna module is used for the reception to predict the best beam of other antenna modules.

CAnet: Uplink-aided Downlink Channel Acquisition in FDD Massive MIMO using Deep Learning

no code implementations12 Jan 2021 Jiajia Guo, Chao-Kai Wen, Shi Jin

The user equipment in the latter one directly feeds back the received pilot signals to the base station.

Beamspace Channel Estimation for Wideband Millimeter-Wave MIMO: A Model-Driven Unsupervised Learning Approach

no code implementations30 Jun 2020 Hengtao He, Rui Wang, Weijie Jin, Shi Jin, Chao-Kai Wen, Geoffrey Ye Li

By utilizing the Stein's unbiased risk estimator loss, the LDGEC network can be trained only with limited measurements corresponding to the pilot symbols, instead of the real channel data.

Compressive Sensing Denoising

Model-Driven Deep Learning for Massive Multiuser MIMO Constant Envelope Precoding

no code implementations27 Jun 2020 Yunfeng He, Hengtao, He, Chao-Kai Wen, Shi Jin

Constant envelope (CE) precoding design is of great interest for massive multiuser multi-input multi-output systems because it can significantly reduce hardware cost and power consumption.

Model-Driven DNN Decoder for Turbo Codes: Design, Simulation and Experimental Results

no code implementations16 Jun 2020 Yunfeng He, Jing Zhang, Shi Jin, Chao-Kai Wen, Geoffrey Ye Li

The TurboNet inherits the superiority of the max-log-MAP algorithm and DL tools and thus presents excellent error-correction capability with low training cost.

Lightweight Convolutional Neural Networks for CSI Feedback in Massive MIMO

no code implementations1 May 2020 Zheng Cao, Wan-Ting Shih, Jiajia Guo, Chao-Kai Wen, Shi Jin

We develop a DL based CSI feedback network in this study to complete the feedback of CSI effectively.

Information Theory Signal Processing Information Theory

Deep Learning-based CSI Feedback for RIS-assisted Multi-user Systems

no code implementations6 Mar 2020 Jiajia Guo, Xi Yang, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

These enhancements are tasked with the precise retrieval and fusion of shared and individual data.

Information Theory Signal Processing Information Theory

Compression and Acceleration of Neural Networks for Communications

no code implementations31 Jul 2019 Jiajia Guo, Jinghe Wang, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

Deep learning (DL) has achieved great success in signal processing and communications and has become a promising technology for future wireless communications.

Information Theory Signal Processing Information Theory

Model-Driven Deep Learning for MIMO Detection

no code implementations22 Jul 2019 Hengtao He, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

In this paper, we investigate the model-driven deep learning (DL) for MIMO detection.

Convolutional Neural Network based Multiple-Rate Compressive Sensing for Massive MIMO CSI Feedback: Design, Simulation, and Analysis

1 code implementation14 Jun 2019 Jiajia Guo, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

Massive multiple-input multiple-output (MIMO) is a promising technology to increase link capacity and energy efficiency.

Signal Processing Information Theory Information Theory

Gridless Variational Bayesian Channel Estimation for Antenna Array Systems with Low Resolution ADCs

1 code implementation3 Jun 2019 Jiang Zhu, Chao-Kai Wen, Jun Tong, Chongbin Xu, Shi Jin

Employing low-resolution analog-to-digital converters (ADCs) coupled with large antenna arrays at the receivers has drawn considerable interests in the millimeter wave (mm-wave) system.

Signal Processing Information Theory Information Theory

Deep Learning Based on Orthogonal Approximate Message Passing for CP-Free OFDM

no code implementations4 May 2019 Jing Zhang, Hengtao He, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

The DL-OAMP receiver includes a channel estimation neural network (CE-Net) and a signal detection neural network based on OAMP, called OAMP-Net.

Artificial Intelligence-aided Receiver for A CP-Free OFDM System: Design, Simulation, and Experimental Test

no code implementations12 Mar 2019 Jing Zhang, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

The AI receiver includes a channel estimation neural network (CE-NET) and a signal detection neural network based on orthogonal approximate message passing (OAMP), called OAMP-NET.

Information Theory Information Theory

AI-Aided Online Adaptive OFDM Receiver: Design and Experimental Results

no code implementations17 Dec 2018 Peiwen Jiang, Tianqi Wang, Bin Han, Xuanxuan Gao, Jing Zhang, Chao-Kai Wen, Shi Jin, Geoffrey Ye Li

From the OTA test, the AI-aided OFDM receivers, especially the SwitchNet receiver, are robust to real environments and promising for future communication systems.

Model-Driven Deep Learning for Physical Layer Communications

no code implementations17 Sep 2018 Hengtao He, Shi Jin, Chao-Kai Wen, Feifei Gao, Geoffrey Ye Li, Zongben Xu

Intelligent communication is gradually considered as the mainstream direction in future wireless communications.

Intelligent Communication

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