Results 51 to 60 of about 550 (177)

Enhancing FSO‐DWDM Performance Through Compensation Strategies

Engineering Reports, Volume 7, Issue 12, December 2025.
This study investigates the performance of free space optics (FSO) with dense wavelength division multiplexing (DWDM) systems, focusing on the impact of channel number and compensation strategies on bit error rate (BER). Results show that post‐compensation significantly improves performance, extending the system's range from 3 to 5 km.
Ifat Rasheed, Gurinder Kaur Sodhi, Reetu Malhotra, Manish Kumar Singla, Wulfran Fendzi Mbasso   +4 more
wiley   +1 more source

Design and Reception Method of Code Shift Keying Signals With Power‐of‐Two Phase Intervals

IET Radar, Sonar & Navigation
Precise point positioning (PPP) technology has garnered extensive attention for its ability to deliver real‐time centimetre‐level accuracy services. When providing PPP services via satellite navigation signals, it is necessary to increase the data rate ...
Nengjie Yu, Dun Wang, Xiaohui Ba, Mingquan Lu, Shaobo Shen   +4 more
doaj   +1 more source

Nonlinear Distortion Equalization in Multi‐Span Optical Links Via a Feed‐Forward Photonic Neural Network

Laser &Photonics Reviews, Volume 19, Issue 23, December 3, 2025.
A feed‐forward photonic neural network equalizes linear and nonlinear impairments in multi‐span IMDD optical fiber transmission. The linear processing stage employs an 8‐tap optical Finite Impulse Response filter integrated on a silicon photonics platform, while the end‐of‐line photodetector represents the nonlinear stage.
Emiliano Staffoli, Elisabetta Ferri, Stefano Gretter, Lorenzo Pavesi   +3 more
wiley   +1 more source

QCL‐Based Cryogen‐Free THz Optical Wireless Communication Link

Laser &Photonics Reviews, Volume 19, Issue 6, March 18, 2025.
A novel QCL‐based, cryogen‐free, and transportable wireless communication system is presented operating at 2.83 THz. The QCL device is mounted in a compact Stirling refrigerator, while a room‐temperature graphene‐based FET is used as a receiver, implementing a binary on‐off keying (OOK) modulation scheme with Manchester encoding.
Alessia Sorgi, Marco Meucci, Muhammad A. Umair, Francesco Cappelli, Guido Toci, Paolo De Natale, Leonardo Viti, Andrea C. Ferrari, Miriam S. Vitiello, Luigi Consolino, Jacopo Catani   +10 more
wiley   +1 more source

Application of time reversal technique in shallow water environment

Archives of Acoustics, 2014
Underwater acoustic communications in shallow water environment is a challenging problem due to the intersymbol interference caused by time-varying dispersive multipath channel.
Sławomir Jastrzębski
doaj  

Study of filtering algorithms receive digital messages using MIMO technology in channels with memory

Физика волновых процессов и радиотехнические системы, 2015
The article investigates the three different algorithms to combat intersymbol interference in a MIMO-communication systems with a 2x2 configuration (zero forcing algorithm, minimizing mean square error algorithm and the algorithm technique as a whole ...
V.G. Kartashevskii, O.S. Konyaeva
doaj  

Study on canceling intersymbol interference of inverse-GPS

6th International Conference on Signal Processing, 2002., 2003
In inverse-GPS (Global Positioning System), intersymbol interference greatly influences the positioning error. The paper deals with a new interference canceller by means of which the error is reduced. The interference canceller which we propose is composed of a DLL (delay locked loop) and adaptive filter.
SUZUKI, Toshiaki, TANAKA, Toshiyuki
openaire   +2 more sources

Partial PIC-MRC Receiver Design for Single Carrier Block Transmission System over Multipath Fading Channels

International Journal of Antennas and Propagation, 2012
Single carrier block transmission (SCBT) system has become one of the most popular modulation systems due to its low peak-to-average power ratio (PAPR), and it is gradually considered to be used for uplink wireless communication systems. In this paper, a
Juinn-Horng Deng, Sheng-Yang Huang
doaj   +1 more source

Multi-User Detection for Group Orthogonal Multi-Carrier Code Division Multiple Access System in Frequency Selective Rayleigh Fading Channel

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  

Digital information transmission system based on multilevel signals with a compact spectrum

Технологія та конструювання в електронній апаратурі, 2008
A method for digital information transmission is proposed that reduces intersymbol interference and improves the efficiency of clock synchronization devices through the use of specially shaped signal functions.
E. A. Sukachоv, P. A. Shkulipa
doaj