Results 21 to 30 of about 2,245 (187)

SCMA codebooks design for Rayleigh fading channel

Tongxin xuebao, 2022
According to the symbol error eate (SER) of the superimposed constellation, the near-optimal space code multiple access (SCMA) codebooks were explored under uplink and downlink Rayleigh fading channels, respectively.A near-optimal codebook design scheme ...
Tuofeng LEI, Shuyan NI, Naiping CHENG, Xin SONG   +3 more
doaj   +2 more sources

On the MIMO Capacity for Distributed System under Composite Rayleigh/Rician Fading and Shadowing

International Journal of Antennas and Propagation, 2015
Wireless channels are commonly affected by short-term fading and long-term fading (shadowing). The shadowing effects must be taken into account also when mobility is present in the wireless scenario.
Santiago González-Aurioles, J. L. Padilla, P. Padilla, Juan F. Valenzuela-Valdés, Juan C. Gonzalez-Macias   +4 more
doaj   +1 more source

Simple and Robust Log-Likelihood Ratio Calculation of Coded MPSK Signals in Wireless Sensor Networks for Healthcare

Applied Sciences, 2022
The simple and robust log-likelihood ratio (LLR) computation of coded Multiple Phase Shift Keying (MPSK) signals in Wireless Sensor Networks (WSNs) is considered under both phase noncoherent and Rayleigh fading channels for healthcare applications.
Bo Xie, Congfang Ma, Haiqiong Li, Gaoyuan Zhang, Congzheng Han   +4 more
doaj   +1 more source

New Golay decoding method using auto-encoder and OSD

ICT Express
In this study, we explore the potential of leveraging machine learning techniques, specifically auto-encoders (AE), for the decoding of linear block codes.
Hyun Woo Cho, Young Joon Song
doaj   +1 more source

Performance Analysis of SPSK with Dual Polarized Transmit Antennas over Rayleigh Fading Channel

Journal of Telecommunications and Information Technology, 2018
In this paper, the Space Polarization Shift Keying (SPSK) system, which is an extended version of Space Shift Keying (SSK) and includes both space and polarization dimensions with dual polarized antennas, is studied.
Malarvizhi Subramani, Arumbu Vanmathi Neduncheran, Vijayakumar Ponnusamy   +2 more
doaj   +1 more source

Effective capacity of a correlated Rayleigh fading channel [PDF]

Wireless Communications and Mobile Computing, 2011
AbstractThe next generation wireless networks call for quality of service (QoS) support. The effective capacity (EC) proposed by Wu and Negi provides a powerful tool for the design of QoS provisioning mechanisms. In their previous work, Wu and Negi derived a formula for effective capacity of a Rayleigh fading channel with arbitrary Doppler spectrum ...
Qing Wang 0004, Dapeng Wu 0001, Pingyi Fan   +2 more
openaire   +1 more source

Capacity analysis over fractional order Rayleigh fading channel under additive white generalized Gaussian noise

IET Communications
This study presents an innovative fractional order Rayleigh fading model that can be used for channel capacity estimation in the presence of additive white generalized Gaussian noise.
Mehran Kakavand, Mohammadreza Hassannejad Bibalan, Mina Baghani   +2 more
doaj   +1 more source

Bioinspired Adaptive Sensors: A Review on Current Developments in Theory and Application

Advanced Materials, EarlyView.
This review comprehensively summarizes the recent progress in the design and fabrication of sensory‐adaptation‐inspired devices and highlights their valuable applications in electronic skin, wearable electronics, and machine vision. The existing challenges and future directions are addressed in aspects such as device performance optimization ...
Guodong Gong, You Zhou, Qingxiu Li, Wenyu Zhao, Sunyingyue Geng, Hangfei Li, Yan‐Bing Leng, Shirui Zhu, Guanglong Ding, Yongbiao Zhai, Ziyu Lv, Ye Zhou, Su‐Ting Han   +12 more
wiley   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

The Channel Fading Influence of the Receiver Operating Characteristics of the TT&C Receiver Based on the Dual-Sequence Frequency Hopping

International Journal of Aerospace Engineering
Aimed at the antijamming needs of the space tracking, telemetry command (TT&C) receiver under a low signal-to-noise ratio, the anti-interference advantage of the dual-sequence frequency hopping (DSFH) communication system is applied.
Guangkai Liu, Jie Guo, Weizheng Xin, Cheng Cheng, Lu Wang   +4 more
doaj   +1 more source