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Reconfigurable Intelligent Surface Aided Cell-Free MIMO Communications

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (4)

Cell-free system is an efficient solution to eliminate inter-cell interference by serving users without cell boundaries. To further improve the spectr......

The Low-Complexity Design and Optimal Training Overhead for IRS-Assisted MISO Systems

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (8)

A low-complexity channel estimation and passive beamforming design for intelligent reflecting surface (IRS)-assisted multiple-input single-output (MIS......

Hybrid Beamforming for mmWave MU-MISO Systems Exploiting Multi-Agent Deep Reinforcement Learning

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (5)

In this letter, we investigate the hybrid beamforming based on deep reinforcement learning (DRL) for millimeter Wave (mmWave) multi-user (MU) multiple......

Outage Performance for Optical Feeder Link in Satellite Communications With Diversity Combining

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (5)

This letter investigates the outage performance of an optical feeder link in satellite communications, where the gateway is equipped with multiple ape......

Distributed Online Caching for High-Definition Maps in Autonomous Driving Systems

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (7)

This letter investigates online high-definition (HD) map caching for autonomous driving in vehicular networks when vehicles' requests and trajectories......

SALDR: Joint Self-Attention Learning and Dense Refine for Massive MIMO CSI Feedback With Multiple Compression Ratio

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (9)

The advantages of massive multiple-input multiple-output (MIMO) techniques depend heavily on the accuracy of channel state information (CSI). In frequ......

Large Intelligent Surfaces With Channel Estimation Overhead: Achievable Rate and Optimal Configuration

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (5)

Large intelligent surfaces (LIS) present a promising new technology for enhancing the performance of wireless communication systems. Realizing the gai......

Novel Efficient Multiwavelet-Based Modulation for Downlink NOMA Systems

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (6)

A new modulation scheme using multiwavelets for downlink non-orthogonal multiple-access (NOMA) transceivers is presented in this work. Multiwavelets l......

Joint Uplink and Downlink Resource Allocation for NOMA-Enabled D2D Communications

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (6)

This letter investigates the joint uplink and downlink resource allocation problem, where the non-orthogonal multiple access (NOMA) technology is appl......

Beamsteering for 5G Mobile Communication Using Programmable Metasurface

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (7)

The usage of programmable metasurfaces (PMs) offers a promising way to realize flexible and fully electronic beam steering. Compared to phased arrays,......

Multipath Similarity Index Measure Across Multiple Frequency Bands

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (8)

In a future generation mobile communications system, a heterogeneous network operating over multiple frequency bands from centimeter-wave (cmWave) to ......

Cascaded Channel Estimation for RIS Assisted mmWave MIMO Transmissions

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (9)

Channel estimation is challenging for the reconfigurable intelligence surface (RIS) assisted millimeter wave (mmWave) communications. Since the number......

Statistical CSI-Based Design for Reconfigurable Intelligent Surface-Aided Massive MIMO Systems With Direct Links

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (5)

This letter investigates the performance of reconfigurable intelligent surface (RIS)-aided massive multiple-input multiple-output (mMIMO) systems with......

Power Control for a URLLC-Enabled UAV System Incorporated With DNN-Based Channel Estimation

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (5)

This letter is concerned with power control for an ultra-reliable and low-latency communications (URLLC) enabled unmanned aerial vehicle (UAV) system ......

Utilizing Interference by Network Coding for Simultaneous Wireless Information and Power Transfer

期刊: IEEE WIRELESS COMMUNICATIONS LETTERS, 2021; 10 (6)

This letter puts forth a novel way to manage interference in simultaneous wireless information and power transfer (SWIPT) systems by utilizing physica......

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