Design of High Efficiency Modulater and Encoder Based on FPGA in FSO Communication System

2011 ◽  
Vol 48 (10) ◽  
pp. 100602
Author(s):  
徐建武 Xu Jianwu ◽  
王红星 Wang Hongxing ◽  
胡昊 Hu Hao ◽  
刘敏 Liu Min
Keyword(s):  
Communication System ◽  
High Efficiency

scholarly journals BPL-PLC Voice Communication System for the Oil and Mining Industry

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4763
Author(s):  
Grzegorz Debita ◽  
Przemysław Falkowski-Gilski ◽  
Marcin Habrych ◽  
Grzegorz Wiśniewski ◽  
Bogdan Miedziński ◽  
...  
Keyword(s):  
Fiber Optics ◽  
Communication System ◽  
Communication Systems ◽  
High Efficiency ◽  
Coal Dust ◽  
Mining Industry ◽  
Power Line ◽  
Communication Link ◽  
Voice Communication ◽  
Medium Voltage

Application of a high-efficiency voice communication systems based on broadband over power line-power line communication (BPL-PLC) technology in medium voltage networks, including hazardous areas (like the oil and mining industry), as a redundant mean of wired communication (apart from traditional fiber optics and electrical wires) can be beneficial. Due to the possibility of utilizing existing electrical infrastructure, it can significantly reduce deployment costs. Additionally, it can be applied under difficult conditions, thanks to battery-powered devices. During an emergency situation (e.g., after coal dust explosion), the medium voltage cables are resistant to mechanical damage, providing a potentially life-saving communication link between the supervisor, rescue team, paramedics, and the trapped personnel. The assessment of such a system requires a comprehensive and accurate examination, including a number of factors. Therefore, various models were tested, considering: different transmission paths and types of coupling (inductive and capacitive), as well as various lengths of transmitted data packets. Next, a subjective quality evaluation study was carried out, considering speech signals from a number of languages (English, German, and Polish). Based on the obtained results, including both simulations and measurements, appropriate practical conclusions were formulated. Results confirmed the applicability of BPL-PLC technology as an efficient voice communication system for the oil and mining industry.

Research toward a High-Efficiency Voice Communication System

Science ◽  
1965 ◽  
Vol 148 (3670) ◽  
pp. 667-668 ◽  
Author(s):  
H. F. Olson ◽  
H. Belar ◽  
E. S. Rogers
Keyword(s):  
Communication System ◽  
High Efficiency ◽  
Voice Communication

Research on Security Communication for SDG Integrated QKD

2013 ◽  
Vol 385-386 ◽  
pp. 1558-1561
Author(s):  
Yong Hong Ma ◽  
Xiu Yu Wang ◽  
Dan Dan Cui
Keyword(s):  
Theoretical Calculation ◽  
Communication System ◽  
Quantum Key Distribution ◽  
High Efficiency ◽  
Flow Diagram ◽  
Security Threats ◽  
Generation Process ◽  
Session Key ◽  
Security Communication ◽  
Technical Idea

Firstly, through deeply analyzing the security threats that exist in the PON, this paper proposes a technical idea which integrates high-efficiency subcarrier multiplexed quantum key distribution into PON-SDG communication system. Secondly, we conduct theoretical calculation for the configuration parameters of PON and verify the feasibility of the technology. Finally, the concrete implementation flow-diagram and the generation process of the session key are given .The research results can provide the theoretical reference for building the secure and efficient SDG.

scholarly journals Bidirectional Communication System on Power Line Integrated on Electronic Board for Driving of LED and HID Lamps

2012 ◽  
Vol 2012 ◽  
pp. 1-10
Author(s):  
P. Visconti ◽  
S. D'Amico ◽  
A. Baschirotto ◽  
D. Romanello ◽  
P. Costantini ◽  
...  
Keyword(s):  
Communication System ◽  
High Efficiency ◽  
Light Emitting Diode ◽  
Power Line ◽  
Production Costs ◽  
Digital Information ◽  
Light Emitting ◽  
Communication Techniques ◽  
Electronic Board ◽  
And Control

We present the bidirectional power line communication system developed in parallel to an electronic board for driving and control of HID (high-intensity discharge) and LED (light-emitting diode) lamps. The communication system, developed to be applied in the sector of public illumination, is been designed to combine high efficiency and reliability with low production costs; it consists indeed of discrete cheap components. The communication system described in this paper implements the technique of transporting digital information over existing power lines, avoiding the issue of installing new cables. Digitized signals can use power line cables through the amplitude voltage and current modulation. The solution proposed is more advantageous compared to communication techniques currently on the market which are essentially two types, power line carrier (modem for high-voltage lines) or radio (zig-Bee transceiver).

Research towards a High‐Efficiency Voice‐Communication System

1965 ◽  
Vol 37 (6) ◽  
pp. 1199-1199
Author(s):  
Harry F. Olson ◽  
H. Belar ◽  
Edward S. Rogers
Keyword(s):  
Communication System ◽  
High Efficiency ◽  
Voice Communication
Sign in / Sign up

Export Citation Format

Share Document