Enhancing Spectral Efficiency of 6G Downlink Beamforming via Cooperative Multi-Agent Deep Reinforcement Learning [PDF]
SensorsThis paper presents a new beamforming algorithm for Multi-User Multiple-Input Multiple-Output (MU-MIMO) systems using Multi-Agent Reinforcement Learning (MARL).
Ali Al Janaby +2 more
doaj +2 more sources
Energy Efficient Secure Communication Model against Cooperative Eavesdropper
Applied Sciences, 2021 In a wiretap channel system model, the jammer node adopts the energy-harvesting signal as artificial noise (jamming signal) against the cooperative eavesdroppers.
Akashkumar Rajaram +3 more
doaj +1 more source
UAV Relay Flight Path Planning in the Presence of Jamming Signal
IEEE Access, 2019 The flight path of the unmanned aerial vehicle (UAV) relay can significantly affect the performance of the wireless relay communication system. In this paper, we investigate the optimization of the UAV flight path in a wireless relay communication system,
Meng-Chuan Mah +2 more
doaj +1 more source
Intersymbol Interference in Indoor Visible Light Communication Systems Employing LED Sources of Large Area [PDF]
The Egyptian International Journal of Engineering Sciences and Technology, 2022 This work is concerned with the assessment of inter-symbol interference (ISI) encountered in indoor visible light communication (VLC) system inside a room of relatively small dimensions (room area ≤ 5m × 5m).
Khalid Hussein, Marwa Ali
doaj +1 more source
Spectral Correlation for Signal Presence Detection and Frequency Acquisition of Small Satellites
Aerospace, 2021 Challenges in interference-limited satellite detection arising from the low-earth orbit (LEO) and the Industrial, Scientific and Medical (ISM) frequency bands are addressed.
Jonas Hofmann +4 more
doaj +1 more source
Random Matrix Theory Predictions of Dominant Mode Rejection Beamformer Performance
IEEE Open Journal of Signal Processing, 2022 Adaptive beamformers use a sensor covariance matrix estimated from data snapshots to mitigate directional interference and attenuate uncorrelated noise.
Christopher Hulbert, Kathleen Wage
doaj +1 more source
IEEE Access, 2021 The probability distribution of the signal-to-interference plus noise ratio (SINR) is analyzed and approximated by the generalized gamma distribution for mode-dependent loss (MDL)-impaired fiber links.
Siyu Gong +4 more
doaj +1 more source
Waveform Optimization of Compressed Sensing Radar without Signal Recovery
Information, 2019 Radar signal processing mainly focuses on target detection, classification, estimation, filtering, and so on. Compressed sensing radar (CSR) technology can potentially provide additional tools to simultaneously reduce computational complexity and ...
Quanhui Wang, Ying Sun
doaj +1 more source
Performance of ZF Linear Equalizers for Single Carrier Massive MIMO Uplink Systems
IEEE Access, 2018 In this paper, we investigate the performance of the spatial-temporal zero-forcing linear equalizer architectures for a single-carrier Massive MIMO uplink system under frequency-selective fading environment.
Ting Li, Murat Torlak
doaj +1 more source
An Improved Sub-Array Adaptive Beamforming Technique Based on Multiple Sources of Errors
Journal of Marine Science and Engineering, 2020 In this paper, a new robust adaptive beamforming method is proposed in order to improve the robustness against steering vector (SV) mismatches that arise from multiple types of array errors.
Zhuang Xie +3 more
doaj +1 more source