scholarly journals Coding Techniques using IDMA OFDM MIMO for Underwater Wireless Acoustic Communication

2020 ◽  
Vol 8 (5) ◽  
pp. 3968-3973
Keyword(s):  
High Speed ◽  
Turbo Code ◽  
High Capacity ◽  
Ldpc Code ◽  
Data Rate ◽  
Underwater Communication ◽  
Available Bandwidth ◽  
Mimo Ofdm ◽  
High Speed Data ◽  
Communication Demands

Future Underwater communication demands high speed data transmission. Present Underwater communication can only provide a limited data rate, where the available bandwidth is limited. To increase the data rate, we simulate the MIMO-OFDM with IDMA technique. In MIMO method many transmitter and many receiver antennas are present. MIMO method offer a very high capacity which raises linearly with the numeral of antennas. Data rate increases with MIMO method, bandwidth is saved and fading is reduced with OFDM. In OFDM technique the complete sign orthogonally overlays in a frequency field that secures the bandwidth. IDMA system is constructed on interleaving procedure. In this paper different coding techniques Convolutional, RS code, LDPC code, Turbo code with IDMA OFDM MIMO technique are compared. IDMA OFDM MIMO with Turbo code, BER performance is improved up to 10-6 .

Appraisal of OFDM for multi-carrier, high-speed data rate wireless communication networks

2019 ◽  
Author(s):  
Muhammad Bello Abdullahi
Keyword(s):  
Wireless Communication ◽  
Communication Networks ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Research Work ◽  
Wireless Systems ◽  
Data Rate ◽  
High Quality Research ◽  
Global Issues ◽  
High Speed Data

Orthogonal Frequency Division Multiplexing (OFDM) is used to achieve multi-carrier signals and high- Speed data rate in free space. OFDM-based systems operate in the hostile multipath radio environment, which allows efficient sharing of limited resources. This research work was designed, developed and simulated an OFDM System using the basic blocks of Simulink in MATLAB/Simulink software, to support multi-carrier, high-speed data rates. This was achieved in backing of collection and review of high-quality research papers, which reported the latest research developments in OFDM communications networks, and its applications in future wireless systems. The research work significantly increases the speed of data rate signals, and many critical problems associated with the applications of OFDM technologies in future wireless systems are still looking for efficient solutions. This would overcome the global issues and challenges facing the limited bandwidth in wireless communication network.

scholarly journals Vehicle Collision Avoidance System Using Li-Fi

2021 ◽  
Author(s):  
P.M. Benson Mansingh ◽  
G. Sekar ◽  
T. Joby Titus
Keyword(s):  
Visible Light ◽  
Communication System ◽  
High Speed ◽  
Visible Light Communication ◽  
Data Rate ◽  
Road Accidents ◽  
Daily Lives ◽  
Vehicle Collision ◽  
The World ◽  
High Speed Data

In recent times, large numbers of road accidents occurring all over the world are mainly due to collisions between vehicles. More than 1.2 million peoples were died in road accidents in 2019, according to the World Health Organization (WHO). Human safety features are much needed in the manufacturing of vehicles. The proposed method mainly focuses on reducing the number of accidents in our daily lives by avoiding collision between the vehicles. There are several factors corresponding to such difficult conditions that may results in death or disabilities. The causes are sudden loss of concentration of the driver, braking failure and stability issues. These criteria can be reduced only if there is a possibility for communication between the vehicles and the drivers in order to avoid accidents. There are various vehicular communication system models like Dedicated Short Range Communication and Vehicular Ad-Hoc network operating less than 5.9 GHz. These radio frequency based communication also has some limitations such as interference, congested spectrum and security. These drawbacks can be reduced by implementing the Visible Light Communication (VLC) in vehicles. It provides larger bandwidth, security, interference immunity, and high data rate. High speed data transmission and reception can be achieved using visible light based data communication system. This technology is known as Light Fidelity (Li-Fi). This chapter presents the innovative method to evade collision between two vehicles (rear and front). This communication system is cost effective with high speed data rate capabilities.

scholarly journals Feasibility Study of While-drilling Data Transmission Technology Based on Radio Frequency Identification

2015 ◽  
Vol 8 (1) ◽  
pp. 293-296
Author(s):  
Wei-Ning Ni ◽  
Ji-Bo Li ◽  
Shan-Guo Li ◽  
Wei Zhang
Keyword(s):  
Radio Frequency Identification ◽  
Data Transmission ◽  
Electromagnetic Waves ◽  
High Speed ◽  
High Capacity ◽  
Low Frequency ◽  
Rfid Tags ◽  
Frequency Identification ◽  
High Speed Data ◽  
Transmission Speed

Downhole data transmission methods based on mud-pulse and low-frequency electromagnetic waves can’t satisfy the need of large amount and high speed data uploading during drilling. In this paper, a novel data transmission technique based on releasing RFID tags by LWD tools is designed and validated. As the memory and transmission media, RFID tags are pre-mounted tactfully in cavities of the downhole releasing tool which can transmits/write LWD data to these tags. By releasing regularly or irregularly into the annulus fluids, RFID tags can be carried to the surface by mud circulation. To finish data transportation function, LWD data can be read out on the surface. Wireless charging high capacity (1Mbits) RFID tags are designed, which contains microprocessor and memory, to expand the storage capacity of RFID tags. The power supply for microprocessor and memory in the tag is electromagnetic waves from RF Reader/Writer module. The equivalent data transmission speed of this system can be up to 278 bit/s (1 tag/h is assumed), which is more much faster than the traditional mud pulser (<10 bit/s).

High Speed Data Transmission Using Coding

2012 ◽  
Vol 229-231 ◽  
pp. 1635-1638
Author(s):  
Yousef Hwegi ◽  
Nasser Hassen
Keyword(s):  
Data Transmission ◽  
High Speed ◽  
Forward Error Correction ◽  
Convolutional Code ◽  
Turbo Code ◽  
System Capacity ◽  
Signal Degradation ◽  
High Speed Data ◽  
Forward Error ◽  
Speed Data Transmission

The relible and fast data transmission over noisy band limitted channels is the basic requirment of digital communication and transmission system. Reliability considerations require that forward error correction techniques be used. This techniques find and correct limitted erros caused by a transport or storage systems. Such coding technique is therefore used to help compensate for signal degradation and provide increase in system capacity and reliability. In this paper, we analyze the performance of three codes which are the Reed Soloman Code, the convolutional code, and turbo code for the same signal that is corrupted by transmission channel. The type of channel considered in this work is the AWGN. For the same message length, the turbo code gives the best performance and the Reed Soloman Code gave the poorest performance when the signal is corrupted by AWGN channel.

Real-Time Transmission of Full-Motion Echocardiography over a High-Speed Data Network: Impact of Data Rate and Network Quality of Service

2000 ◽  
Vol 13 (8) ◽  
pp. 764-770 ◽  
Author(s):  
Michael L. Main ◽  
David Foltz ◽  
Michael S. Firstenberg ◽  
Eric Bobinsky ◽  
Debra Bailey ◽  
...  
Keyword(s):  
Quality Of Service ◽  
Real Time ◽  
High Speed ◽  
Data Rate ◽  
Data Network ◽  
High Speed Data ◽  
Real Time Transmission ◽  
Network Quality

Development of a ROF-based System Using DQPSK through IsOWC Channel for Long Haul Data Rate Applications

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Paramjot Singh ◽  
Himali Sarangal ◽  
Simrandeep Singh Thapar
Keyword(s):  
Wireless Communication ◽  
High Speed ◽  
Satellite Communication ◽  
Data Rate ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
High Data ◽  
Shift Keying ◽  
Promising Area ◽  
High Speed Data

Abstract In order to achieve large capacity inter-satellite communication, optical wireless communication (OWC) is emerging as a promising area of research amongst the academic and research groups. While radio over fiber (ROF) and advanced modulation technique is considered to be a key enabling technology in the development of OWC based access networks for high-speed data transmission. This paper has proposed a novel ROF based system model using OWC for long haul high data rate applications. This system is designed using differential quadrature phase shift keying (DQPSK) through inter-satellite optical wireless communication (IsOWC) channel. The verification of the performance is performed at bit rates of 100 and 200 Gbps over a space distance range up to 1000 to 50000 km under different transmitted power. The simulative investigation has been carried out in terms of important parameters like BER, Q-factor and eye diagrams.

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