Results 51 to 60 of about 723,469 (162)
Journal of Engineering and Sustainable Development, 2008 Code Division Multiple Access (CDMA) suffers from multi-user interference (MUI), and intersymbol interference (ISI) under frequency selective multi-path fading channels. Orthogonal Frequency Division Multiple access (OFDM) is MUI free but achieves lower
Maha George Zia, Harith Akram Nassir
doaj
Engineering Reports, Volume 7, Issue 1, January 2025.ABSTRACT Due to the long transmission distance of the constellation network represented by the low‐orbit satellite system, the satellite‐to‐ground link is subject to large path loss and limited communication performance. This paper uses multi‐satellite and multi‐beam joint transmission technology to form a virtual multiplex network with ground multi ...
Yuyang Liu, Tong Shi, Hua Wang
wiley +1 more source
Detection Strategies for MIMO‐GFDM‐IM System
IET Communications, Volume 19, Issue 1, January/December 2025.Dedicated to studying the multiple‐input multiple‐output generalized frequency division multiplexing with index modulation wireless communication system, this paper highlights its high spectral and energy efficiency, robustness against multipath channels.
José Luis Calpa Juajinoy +2 more
wiley +1 more source
Interference Mitigation in Cooperative SFBC-OFDM
EURASIP Journal on Advances in Signal Processing, 2008 We consider cooperative space-frequency block-coded OFDM (SFBC-OFDM) networks with amplify-and-forward (AF) and decode-and-forward (DF) protocols at the relays. In cooperative SFBC-OFDM networks that employ DF protocol, (i), intersymbol interference (ISI)
A. Chockalingam, D. Sreedhar
doaj +1 more source
A CNN‐BiLSTM–Based Deep Learning Model for CPM Signal Detection
Electronics Letters, Volume 61, Issue 1, January/December 2025.This paper proposes a novel convolutional neural network–bidirectional long short‐term memory (CNN‐BiLSTM) architecture for continuous phase modulation (CPM) signal detection, effectively addressing the challenges of computational complexity and memory inherent in CPM signals.
Yang He, Ning Cao, Can Hu, Hao Lu
wiley +1 more source
Design and Reception Method of Code Shift Keying Signals With Power‐of‐Two Phase Intervals
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.A novel approach for the design and reception of CSK signals with a phase interval mapping of power‐of‐two chips is proposed. This method is capable of significantly reducing the demodulation complexity while mitigating the intersymbol interference. ABSTRACT Precise point positioning (PPP) technology has garnered extensive attention for its ability to ...
Nengjie Yu +4 more
wiley +1 more source
A Flexible Constrained ICA Approach for Multisubject fMRI Analysis
International Journal of Biomedical Imaging, Volume 2025, Issue 1, 2025.Large‐scale analysis of functional connectivity within intrinsic brain networks using functional magnetic resonance imaging (fMRI) data has been widely used for identifying biomarkers in various psychiatric disorders. While the emerging access to large neuroimaging datasets provides unprecedented opportunities for exploring brain functions, they also ...
Hanlu Yang +5 more
wiley +1 more source
Performance Enhancement of OFDM‐Based Hybrid Multiplexed Ro‐FSO System Under Complex Rain Conditions
International Journal of Optics, Volume 2025, Issue 1, 2025.The radio over free‐space optical (Ro‐FSO) link serves as an effective and resilient solution for distributing radio frequency (RF) signals over turbulent and adverse weather conditions, using high‐frequency optical carriers. This work proposes an architecture for a high‐speed, spectral‐efficient, and long‐reach hybrid multiplexed Ro‐FSO system that ...
Shivaji Sinha +4 more
wiley +1 more source