Results 41 to 50 of about 285 (138)
Journal of Electrical and Computer Engineering, Volume 2025, Issue 1, 2025.This research paper proposes three joint transmit and receive (TX/RX) beamforming schemes for minimizing the bit error rates of next‐generation wireless sensor networks. Based on minimizing the optimization problem of the total mean squared error between the transmitted and received data symbols, the first beamforming scheme is proposed.
Mohamed S. Abouzeid +4 more
wiley +1 more source
International Journal of RF and Microwave Computer-Aided Engineering, Volume 2025, Issue 1, 2025.Wavelength division multiplexing (WDM) technology is widely used in high‐capacity optical communication systems, enabling the simultaneous transmission of multiple signals over optical fiber. However, signal attenuation and dispersion pose significant challenges to long‐distance optical transmission.
S. Maria Seraphin Sujitha +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
IET Communications, Volume 18, Issue 17, Page 1071-1078, October 2024.The study integrates dimmable constant weight polar‐coded non‐orthogonal multiple access (CWPC‐NOMA) with orthogonal space‐time block coding (OSTBC) for visible light communication (VLC). The proposed scheme enhances spectral efficiency and reliability while optimizing resource utilization and leveraging transmit diversity.
Oluwaseyi Paul Babalola, Vipin Balyan
wiley +1 more source
Journal of Sensors, Volume 2024, Issue 1, 2024.Due to the aquatic nature of communication in the underwater world, the underwater acoustic sensor network (UASN) is commonly used. However, it has inherent limitations, such as limited bandwidth, high transmission energy, long propagation delays, void regions, and expensive battery replacement.
Gulista Khan +7 more
wiley +1 more source
Performance Analysis of DP‐QAM‐Based Optical OFDM PON Employing Optical Multicarrier
Journal of Engineering, Volume 2024, Issue 1, 2024.This work proposes a new hybrid bidirectional standard single mode fiber (SSMF)/free space optical (FSO) dual polarization quadrature amplitude modulation (DP‐QAM) employing optical orthogonal frequency division multiplexing (OFDM). An optical multicarrier generator (OMG) source is utilized. The suggested model is simulated using VPI photonics software.
Ibrahim Luay +2 more
wiley +1 more source
Wireless Communications and Mobile Computing, Volume 2024, Issue 1, 2024.In contemporary wireless communication systems, multicarrier modulation schemes have become widely adopted over single‐carrier techniques due to their improved capacity to address challenges posed by multipath fading channels, leading to enhanced spectral efficiency.
Sourav Debnath +3 more
wiley +1 more source
BER performance of finite in time optimal FTN signals for the Viterbi algorithm
Journal of Electronic Science and Technology, 2020 In this article, we consider the faster than Nyquist (FTN) technology in aspects of the application of the Viterbi algorithm (VA). Finite in time optimal FTN signals are used to provide a symbol rate higher than the “Nyquist barrier” without any encoding.
Sergey B. Makarov +3 more
doaj +1 more source
Sensors, 2012 Underwater communication channels are often complicated, and in particular multipath propagation may cause intersymbol interference (ISI). This paper addresses how to remove ISI, and evaluates the performance of three different receiver structures and ...
Hefeng Dong +2 more
doaj +1 more source