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Movable Antenna Aided Multiuser Communications: Antenna Position Optimization Based on Statistical Channel Information
To address this issue, we propose in this paper a new approach to optimize the MA positions based on the users' statistical CSI over a large timescale.
A Demo of Radar Sensing Aided Rotatable Antenna for Wireless Communication System
Rotatable antenna (RA) represents a novel antenna architecture that enhances wireless communication system performance by independently or collectively adjusting each antenna's boresight/orientation.
Rotatable Antenna Enabled Wireless Communication System with Visual Recognition: A Prototype Implementation
In this demonstration, we present a prototype of the RA-enabled wireless communication system with a visual recognition module to evaluate the performance gains provided by the RA in practical environments.
Movable Antenna Enhanced DF and AF Relaying Systems: Performance Analysis and Optimization
For the AF relaying system, our objective is to maximize the achievable rate by jointly optimizing the two-stage MA positions as well as the AF beamforming matrix at the relay, which results in a more challenging optimization problem due to the intricate coupling variables.
6DMA-Aided Hybrid Beamforming with Joint Antenna Position and Orientation Optimization
This paper studies a sub-connected six-dimensional movable antenna (6DMA)-aided multi-user communication system.
6D Movable Antenna Enhanced Multi-Access Point Coordination via Position and Orientation Optimization
Then, an optimization problem is formulated to maximize the weighted sum rate of multiple UTs for their uplink transmissions by jointly optimizing the antenna position vector (APV), the antenna orientation matrix (AOM), and the receive combining matrix over all coordinated APs, subject to the constraints on local antenna movement regions.
Multi-IRS Enhanced Wireless Coverage: Deployment Optimization Based on Large-Scale Channel Knowledge
Then, we derive the average channel power gains from the BS to IRS in each candidate site and from this IRS to any grid in the target area in terms of IRS deployment parameters, including its size, position, height, and orientation.
Codebook Design and Performance Analysis for Wideband Beamforming in Terahertz Communications
Based on this metric, a wideband analog beamforming codebook design problem is formulated for optimally balancing the beamforming gains in both the spatial and frequency domains, and the performance loss of conventional narrowband beamforming in wideband systems is analyzed.
Sum Rate Maximization for Movable Antenna Enhanced Multiuser Covert Communications
To maximize the sum rate of users under covertness constraint, we formulate an optimization problem to jointly design the transmit beamforming and the positions of MAs at the AP.
Channel Estimation for Movable Antenna Aided Wideband Communication Systems
To start with, we express the CFRs as a combination of the field-response vectors (FRVs), delay-response vector (DRV), and path-response tensor (PRT), which exhibit sparse characteristics and can be recovered by using a limited number of channel measurements at selected position pairs of Tx and Rx MAs over a few subcarriers.
6D Movable Antenna Enhanced Interference Mitigation for Cellular-Connected UAV Communications
Cellular-connected unmanned aerial vehicle (UAV) communications is an enabling technology to transmit control signaling or payload data for UAVs through cellular networks.
Over-the-Air Computation via 2D Movable Antenna Array
In this letter, we advance its application for over-the-air computation (AirComp) network, where an access point is equipped with a two-dimensional (2D) MA array to aggregate wireless data from massive users.
Near-Field Multiuser Communications Aided by Movable Antennas
This letter investigates movable antenna (MA)-aided downlink (DL) multiuser communication systems under the near-field channel condition, where both the base station (BS) and the users are equipped with MAs to fully exploit the degrees of freedom (DoFs) in antenna position optimization.
Sum Rate Maximization for Movable Antenna Enabled Uplink NOMA
Next, we derive the closed-form optimal solution of the decoding order and power control subproblem.
Power Measurement Enabled Channel Autocorrelation Matrix Estimation for IRS-Assisted Wireless Communication
Prior works on IRS CSI acquisition mainly estimate IRS-cascaded channels based on the extra pilot signals received at the users/base station (BS) with time-varying IRS reflections, which, however, needs to modify the existing channel training/estimation protocols of wireless systems.
Integrating Base Station with Intelligent Surface for 6G Wireless Networks: Architectures, Design Issues, and Future Directions
Intelligent surface (IS) is envisioned as a promising technology for the sixth-generation (6G) wireless networks, which can effectively reconfigure the wireless propagation environment via dynamically controllable signal reflection/transmission.
Make Safe Decisions in Power System: Safe Reinforcement Learning Based Pre-decision Making for Voltage Stability Emergency Control
The high penetration of renewable energy and power electronic equipment bring significant challenges to the efficient construction of adaptive emergency control strategies against various presumed contingencies in today's power systems.
Deep learning based on Transformer architecture for power system short-term voltage stability assessment with class imbalance
This work proposes a Transformer-based STVSA method to address this challenge.
Channel Autocorrelation Estimation for IRS-Aided Wireless Communications Based on Power Measurements
Intelligent reflecting surface (IRS) can bring significant performance enhancement for wireless communication systems by reconfiguring wireless channels via passive signal reflection.
Hyperspectral Image Fusion via Logarithmic Low-rank Tensor Ring Decomposition
On the other hand, the tensor nuclear norm (TNN)-based approaches have recently demonstrated to be more efficient on keeping high-dimensional low-rank structures in tensor recovery.
3-D Positioning and Resource Allocation for Multi-UAV Base Stations Under Blockage-Aware Channel Model
Based on the proposed channel model, we formulate the joint optimization problem of UAV three-dimensional (3-D) positioning and resource allocation, by power allocation, user association, and subcarrier allocation, to maximize the minimum achievable rate among users.
Joint 3-D Positioning and Power Allocation for UAV Relay Aided by Geographic Information
To improve communication capacity, we first model the blockage effect caused by buildings according to the three-dimensional (3-D) geographic information.
A Survey on Millimeter-Wave Beamforming Enabled UAV Communications and Networking
The utilization of the millimeter-wave (mmWave) frequency bands is a promising direction for UAV communications, where large antenna arrays can be packed in a small area on the UAV to perform three-dimensional (3D) beamforming.
Data-Driven Short-Term Voltage Stability Assessment Based on Spatial-Temporal Graph Convolutional Network
The proposed STGCN utilizes graph convolution to integrate network topology information into the learning model to exploit spatial information.
Cost-Effective Bad Synchrophasor Data Detection Based on Unsupervised Time Series Data Analytics
Afterwards, TS subsequences contaminated with bad PMU data are identified by characterizing anomalous STNNs.
