Results 21 to 30 of about 2,589,490 (282)

Identification of Orbital Angular Momentum by Support Vector Machine in Ocean Turbulence

open access: yesJournal of Marine Science and Engineering, 2022
With the advancement of underwater communication technology, the traditional modulation dimension has been introduced, developed and utilized. In addition, orbital angular momentum (OAM) is utilized as the modulation dimension for optical underwater ...
Xiaoji Li, Jiemei Huang, Leiming Sun
doaj   +1 more source

Cognitive Radio and Coexistence for Multicasting Communication Systems [PDF]

open access: yes, 2010
This thesis focuses on the performance of terrestrial communication systems that use channel assignment schemes to allocate base stations in a scenario that implements the coexistence of mixed terrestrial communication systems based on cognitive radio ...
Yang, Mengfei
core   +6 more sources

Spectrum sharing and cognitive radio [PDF]

open access: yes, 2009
Spectrum sharing has been the subject of a 3 year research programme organised by the UK's Virtual Centre of Excellence in Mobile and Personal Communications.
A. Yarmohammad   +11 more
core   +1 more source

Research on Adaptive Transmit Diversity Strategy for Reducing Interference in Underwater Optical Multi-Beam Non-Orthogonal Multiple Access Systems

open access: yesPhotonics, 2023
With the rapid development of the underwater Internet of Things (IoT), the number of underwater communication nodes is rapidly increasing. The access capacity of a traditional multi-antenna communication system is limited by the number of transmitting ...
Yanlong Li   +5 more
doaj   +1 more source

Robust beamforming in cognitive radio [PDF]

open access: yesIEEE Transactions on Wireless Communications, 2009
In cognitive radio, it is crucial to control the interference from secondary users (SUs) to primary users (PUs). This paper studies the use of transmit beamforming in the cognitive secondary network for enhancing the performance of a SU while controlling the interference to the PUs.
Wong, KK, Zheng, G, Ng, TS, Ma, S
openaire   +4 more sources

Outage probability analysis of vehicular communication system with two-way AF cooperation

open access: yesDianzi Jishu Yingyong, 2018
In vehicular communication system, two-way cooperative communication can improve system performance. However, vehicle mobile communication will cause the two-way link correlation and thus reduce the system outage performance.
Lin Xiaoyu, Qiu Bin, Xiao Hailin
doaj   +1 more source

Energy-efficient power allocation for massive MIMO-enabled multi-way AF relay networks with channel aging

open access: yesEURASIP Journal on Wireless Communications and Networking, 2018
In this paper, we consider a massive MIMO-enabled multi-way amplify-and-forward relay network with channel aging, where multiple users mutually exchange information via an intermediate relay equipped with massive antennas.
Fangqing Tan   +3 more
doaj   +1 more source

Target detection based on generalized Bures–Wasserstein distance

open access: yesEURASIP Journal on Advances in Signal Processing, 2023
Radar target detection with fewer echo pulses in non-Gaussian clutter background is a challenging problem. In this instance, the conventional detectors using coherent accumulation are not very satisfactory.
Zhizhong Huang, Lin Zheng
doaj   +1 more source

Adaptive Diversity Algorithm Based on Block STBC for Massive MIMO Link Misalignment in UWOC Systems

open access: yesJournal of Marine Science and Engineering, 2023
In the past few years, underwater wireless optical communication (UWOC) has become a promising wireless communication technology in the underwater environment.
Yanlong Li   +5 more
doaj   +1 more source

A Machine Anomalous Sound Detection Method Using the lMS Spectrogram and ES-MobileNetV3 Network

open access: yesApplied Sciences, 2023
Unsupervised anomalous sound detection by machines holds significant importance within the realm of industrial automation. Currently, the task of machine-based anomalous sound detection in complex industrial settings is faced with issues such as the ...
Mei Wang   +7 more
doaj   +1 more source

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