OFDM COMMUNICATION WITH COOPERATIVE RELAY

OFDM COMMUNICATION WITH COOPERATIVE RELAY

Cooperative communications is a new paradigm shift for the fourth generation wireless

system that will guarantee high data rates to all users in the network, and we anticipate

that it will be the key technology aspect in the fifth generation wireless networks.

In terms of research ascendance, cooperative communications can be seen as related to research on relay channel and MIMO systems. Recently, cooperative diversity in wireless network has received great interest and is regarded as promising technique to mitigate multi-path fading, which results in a fluctuation in the amplitudes of the received signal. The cooperative communications is a new communication paradigm which generates independent path between the user and the base station by introducing a relay channel. OFDM technology has been widely used due to its spectral efficiency and inherent flexibility in allocating power and bit rate over distinct subcarriers which are orthogonal to each other.

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Controlling Electrical Appliances Using Computer

Controlling Electrical Appliances Using Computer

The  computer  had  seen  a  lot  of  evolution  both  in  hardware  and  software  Sides,  yet  there  are
some  features  which  remain  unbeatable  and  one  among  them  is  the  structure  oriented
programming language or C. Apart from computer Programming they are fused in circuit boards,
microcontrollers etc to carry out Specified functions. The reason is the elegance and simplicity of
the  keywords  used  in  C.  This  project  is  about  Controlling  Home/Industrial  Appliance  with
computer using Parallel Port Programming in C language. This idea is evolved from the in-out
features of microcontroller. The same can be extended to a PC where the output from PC is a
pulse  which  will  activate  a  relay  and  hence  controlling  electrical/electronic  appliance.  This  is
possible in all PCs having parallel port. PC based electrical appliances control is an interesting
PC based project, mainly  useful for industrial applications, home automation, and supervisory
control  applications.  This  project  gives  exact  concept  of  interfacing  a  high  voltage  electrical
device or DC / AC motor to high sensitive personal computer system. This project is the first
step to design of PC based industrial automation projects. 



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AC-DC-AC PWM CONVERTER

AC-DC-AC PWM CONVERTER

In our day to day life we come across thousands of electrical devices. But have we ever wondered if all of them work on the same type of currents? The answer is ‘NO’ and to feed each and every type of device according to its need we need to have a convertor that can change the electrical energy from one form to another.

The project mainly deals with the conversion of electrical energy from one form to another as per our requirements.As the name suggests there are three major components of the project that are the rectifier (ac-dc convertor) the inverter (dc-ac convertor) and the PWM (pulse width modulator).

In this project we have to simulate the circuit using MATLAB software.This convertor can be an important tool for any other device which works at its optimum capacity only when the current supplied to it is in form of a dc or if it requires any change in its width of each pulse.


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