Analysis of FEC in digital data signal transmission with USRP over SD-RANs

Nowadays, in order to improve the quality of signal transmission and reduce the signal attenuation and noise interference, the transmission digital baseband signal modulation become mainstream in today's signal transmission. For the digital baseband signal transmission performance of research helps us to understand the process of digital signal transmission. Firstly, using shift registers to produce m sequence, used to simulate the data signal and the pseudo random noise signal. Then, to design a low pass filter, used to simulate the channel. Data signal transmission in the channel was carried with additive random noise interference, we can measure signal interference by observing eye pattern at the receiving terminal. If to Manchester encoding of data signal, the receiver decoding output data signal can be extracted using the synchronous clock circuit to get the clock signal to synchronize, and display the eye pattern, which is used to evaluate the performance of the transmission system. And we put forward the optimization scheme of the digital baseband signal transmission performance through the research.

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The bandwidth of digital data signal

IEEE Communications Magazine ◽

10.1109/mcom.1980.1090291 ◽

1980 ◽

Vol 18 (6) ◽

pp. 13-24 ◽

Cited By ~ 74

Author(s):

F. Amoroso

Keyword(s):

Digital Data ◽

Data Signal

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AN ENHANCED G-PON FAULT MONITORING TECHNIQUE USING OPTICAL SENSOR

Science Proceedings Series ◽

10.31580/sps.v1i2.621 ◽

2019 ◽

Vol 1 (2) ◽

pp. 39-42

Author(s):

Auwalu Usman ◽

Nadiatulhuda Zulkifli ◽

Mohd Rashidi Salim ◽

Kharina Khairi

Keyword(s):

Signal Transmission ◽

Optical Network ◽

Passive Optical Network ◽

Optical Line Terminal ◽

Fbg Sensor ◽

Fault Monitoring ◽

Monitoring Technique ◽

Optical Line ◽

Data Signal ◽

Optical Distribution

In this study a technique for a centralized fault monitoring and detection in Gigabit-capable Passive Optical Network (G-PON) using fiber Bragg grating (FBG) sensor is proposed. The technique detects fault once it occurs at the vulnerable locations in the fiber optic distribution link by the proposed FBG devices. Monitoring signal in the C-band is reflected by a uniform FBG with different Bragg wavelengths and reflectivities. The FBGs serve as branch identifiers in the network. The reflected signal from the FBGs is analyzed at the Optical Line Terminal (OLT) in the Central Office (CO) by an Optical Spectrum Analyzer (OSA), to identify the branch with rupture in the network. The simulated result obtained shows that the system can monitor, and detect a fault in the physical layer of the optical distribution network with negligible effects on data signal transmission.

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Simultaneous Signal Amplification and Clock Distribution Employing Backward Raman Pump Over an Optical Fiber for Applications Such as Square Kilometer Array

Journal of Astronomical Instrumentation ◽

10.1142/s2251171717500052 ◽

2017 ◽

Vol 06 (03) ◽

pp. 1750005

Author(s):

E. K. Rotich Kipnoo ◽

R. R. G. Gamatham ◽

A. W. R. Leitch ◽

T. B. Gibbon

Keyword(s):

Optical Fiber ◽

Phase 1 ◽

Signal Transmission ◽

Cost Effective ◽

Cavity Surface ◽

Clock Signal ◽

Clock Distribution ◽

Vertical Cavity Surface ◽

Data Signal ◽

Raman Pump

For the first time to our knowledge, we experimentally demonstrate a clock signal transmission using a counter-propagating Raman pump as a transmitter and concurrently utilize the same pump to amplify a data signal. A 1548[Formula: see text]nm vertical cavity surface emitting laser (VCSEL) was modulated with a pseudorandom bit sequence (2[Formula: see text]) and coupled into an optical fiber. A 1448[Formula: see text]nm Raman pump in the backward scheme was also modulated with a 10[Formula: see text]kHz clock and used to boost the VCSEL data signal so as to improve the reach of the transmission. Clock distribution in a telescope network such as the Square Kilometre Array (SKA) is essential for the proper operation of the digitizers as well as dish synchronization. In the SKA phase 1, long transmissions involving baselines extending up to 100[Formula: see text]km may need amplification. We propose the use of counter-Raman configuration to amplify the signal carrying received astronomical data while transmitting a clock to the receptors. This is a cost-effective bi-directional transmission suited for telescope network applications.

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Signal Synchronization, Collection and Transmission for Multichannel Distribution Seismic Antenna

Journal of the Russian Universities Radioelectronics ◽

10.32603/1993-8985-2018-21-1-25-31 ◽

2018 ◽

pp. 25-31

Author(s):

A. D. Volodin ◽

A. L. Efimenko ◽

A. V. Gorlin ◽

D. A. Kuzmin

Keyword(s):

Data Transmission ◽

Phase Locked Loop ◽

Transmission System ◽

Digital Data ◽

Transmission Protocol ◽

Analog To Digital ◽

Signal Conversion ◽

Signal Synchronization ◽

Data Transmission System ◽

Data Signal

Creation of seismic antennas involves production of a system capable to provide synchronous analog-to- digital data signal conversion of all channels and to broadcast digitized signals to the central computing complex (CCC). The article considers a structure of data transmission system from a big number of sources for application in seismic antennas. Moreover, it provides possible ways of preprocessing equipment (PE) unit arrangement in separate hermetic blocks to facilitate their replacement. Besides, the options for PE unit structural and functional schemes are offered. Application of specific chips is explained. The review of the most widespread types of digital convertors is given and the optimal one is chosen for application in hydro acoustic complexes. The option of synchronization with the use of phase-locked loop PLL units is offered. Configuration of data transmission system with the use of Ethernet switchboard setting optimal data transmission protocol is considered.

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Experimental Transmission of Digital Data Coded on Electrical Carriers at 2.1 GHz and 4.2 GHz by Using a Microwave Photonic Filter

Electronics ◽

10.3390/electronics9050833 ◽

2020 ◽

Vol 9 (5) ◽

pp. 833

Author(s):

Ana Gabriela Correa-Mena ◽

Alicia Vera-Marquina ◽

Alejandro García-Juárez ◽

Jorge Rodríguez-Asomoza ◽

Ignacio Enrique Zaldívar-Huerta

Keyword(s):

Signal Transmission ◽

Single Mode ◽

Passive Optical Network ◽

Digital Data ◽

Digital Signals ◽

High Definition ◽

Microwave Band ◽

Multimode Laser ◽

Microwave Photonic ◽

Band Pass

This paper proposes and demonstrates the use of filtered microwave band-pass windows situated at 2.1 GHz and 4.2 GHz as electrical carriers to transmit digital signals. The use of an appropriate microwave photonic filter (MPF) allows for the generation of the microwave band-pass windows. The key parameters of the filtering effect are the intermodal separation of a multimode laser diode (MLD), the chromatic dispersion parameter of the optical link, and its own length. Experimentally, it is demonstrated that the filtered band-pass windows can be used as electrical carriers to transmit digital signals at frequencies of 50 MHz, 100 MHz, and 150 MHz over 25.31 km of single-mode-standard-fiber (SM-SF). The quality Q-factor, jitter, and bit-error-rate are the parameters that allow for the evaluation of the quality of the digital signal transmission. The obtained results allow for the proposition of this photonic architecture in a passive optical network (PON) to distribute services like Internet Protocol (IP) telephony, internet, streaming video, and high definition television.

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Intelligent Control System Design for Electrical Equipment Management

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.851.521 ◽

2016 ◽

Vol 851 ◽

pp. 521-525

Author(s):

Yu Qiao Meng

Keyword(s):

Control System ◽

Intelligent Control ◽

Signal Transmission ◽

Electrical Equipment ◽

Control System Design ◽

Equipment Management ◽

Intelligent Control System ◽

Network Controller ◽

Data Signal ◽

Terminal Equipment

The article design a kind of intelligent control system with the function that can synthesize data, signal transmission and power control at the same time that it includes six components such as terminal equipment, network, controller, circuit, intelligent socket, electrical equipment. This article introduces the three detailed system implementation case with electrical equipment management mode of supply, working mode and working state of intelligent control is realized through the design of the system and improve the applicability of the system.

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