Design and implementation of Alamouti encoder for 4G wireless system

2009 ◽  
Author(s):  
Mohammad T. Islam ◽  
Mostafa W. Numan ◽  
Norbahiah Misran
Keyword(s):  
Wireless System ◽  
Design And Implementation ◽  
4G Wireless

Design and Implementation of an Electrically Control Circuit for Undulating Fins of Fish-Like Robot

2010 ◽  
Author(s):  
Ahmad Ghanbari ◽  
Mohsen Siahmansouri ◽  
Mir Masoud Seyyed Fakhrabadi ◽  
Seyyed Reza Hashemi Nesaz
Keyword(s):  
Mechanical System ◽  
Electrical Circuit ◽  
Control Circuit ◽  
Control Board ◽  
Wireless System ◽  
Design And Implementation ◽  
Revolution Speed ◽  
Density Control ◽  
And Control ◽  
Phase Differences

In this study, firstly, we compare various kinds of imitator robots and then by investigating of various fish robots properties, we design a mechanism and control circuit for a kind of these robots which its structure was inspired from knife fish. This robot has a segmental anal fin in its bottom which produces required force for advancement and maneuver. It consists of two servomotors and uses a kind of mechanical system to change direction and depth which is presented in this work. Another property of this robot is the existence of density control box for robot suspension which increases its capability for freight. The required signals are sent to this robot to produce the movement and maneuver by using a control handle and a wireless system which are installed on a control board. Therefore, it is possible to control the robot from out of the pool. In this paper, an electrical circuit is designed to control servomotors which enables us to control revolution, speed and phase differences of neighbor servomotors in fins. We also control two servomotors to regulate direction and depth.

scholarly journals A Comparative Study of 4G and VoLTE

2021 ◽  
Vol 9 (12) ◽  
pp. 2338-2341
Author(s):  
Atharva Khandekar
Keyword(s):  
High Speed ◽  
Cost Effective ◽  
Fourth Generation ◽  
Wireless System ◽  
Data Services ◽  
High Spectral Efficiency ◽  
High Speed Data ◽  
4G Wireless ◽  
4G Lte ◽  
Voice Calls

Abstract: This research paper provides an insight into the comparison between VoLTE and 4G. 4G Wireless Systems or Fourth generation wireless system is a packet switched wireless system with wide area coverage and high throughput. It is designed to be cost effective and to provide high spectral efficiency. VoLTE (voice over LTE) supports voice calls over 4G LTE network. With advanced VoLTE technology, the 4G network now provides high-speed data services, high-quality voice and video calls at affordable price. This paper first presents the challenges and benefits of both 4G and VoLTE and then compares them with consideration of different points. Keywords: GSM, LTE, VoLTE, 3G, HSPA, RAN

Design and Implementation of an Embedded Wireless System to Monitor a Hall-Effect Gas Sensor at a Household

2012 ◽  
Author(s):  
Eduardo Rodriguez ◽  
Marco A. Aceves-Fernandez ◽  
Juan M. Ramos-Arreguin ◽  
Saul Tovar-Arriaga ◽  
J. Carlos Pedraza-Ortega ◽  
...  
Keyword(s):  
Hall Effect ◽  
Gas Sensor ◽  
Wireless System ◽  
Design And Implementation
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