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% Your document starts here!
\begin{document}
% Define document title and author
\title{Study the OFDM Transmitter System on Matlab}
\author{Purushottam Patil (44)\\
Rakesh Rathod (50)\\
Sunil P Nagare (38)}
\thanks{Advisor: Sukanya Kulkarni Madam}
\markboth{Digital Communication Mini Project}{}
\maketitle
% Write abstract here
\begin{abstract}
Orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies. OFDM has developed into a popular scheme for wideband digital communication, used in applications such as digital television and audio broadcasting, DSL Internet access, wireless networks, powerline networks, and 4G mobile communications..
\end{abstract}
% Each section begins with a \section{title} command
\section{Introduction}
% \PARstart{}{} creates a tall first letter for this first paragraph
\PARstart{T}{he} transmitter part contains serial to parallel and vice versa , 16-QAM, IFFT, Noise addition sections.The OFDM is the modulation scheme having multicarrier transmission techniques here the available spectrum is divided into many carriers each one being modulated at a low rate data stream. The spacing between the carriers is closer and the carriers are orthogonal to one another preventing interferences between the closely spaced carriers hence OFDM can be thought of as a combination of modulation and multiplexing techniques[9], each carrier in a OFDM signal has very narrow bandwidth so the resulting symbol rate is low which means that the signal has high tolerance to multi path delay spread reducing the possibility of inter symbol
interference (ISI)which is the requirement for today’s
communication systems. OFDM used in the field of wireless and wired communication systems. This is reflected by the adoption of this technique in applications such as digital audio/video broadcast (DAB/DVB), wireless LAN (802.11a and hiperlan2), broadband wireless (802.16) and XDSL
\begin{figure}[!hbt]
% Center the figure.
\begin{center}
% Include the eps file, scale it such that it's width equals the column width. You can also put width=8cm for example...
\includegraphics[width=\columnwidth]{ofdm_tran}
% Create a subtitle for the figure.
\caption{OFDM Transmitter Block Diagram.}
% Define the label of the figure. It's good to use 'fig:title', so you know that the label belongs to a figure.
\label{fig:tf_plot}
\end{center}
\end{figure}
\section{Random Data Generation}
It contains 3 parts including no. of data bits, no.of bits(M), no. of IFFT bits. For that we used randsrc function for generating random data.It generates data serially of 1 x no. of data bits matrix.
\begin{figure}[!hbt]
% Center the figure.
\begin{center}
% Include the eps file, scale it such that it's width equals the column width. You can also put width=8cm for example...
\includegraphics[width=\columnwidth]{1}
% Create a subtitle for the figure.
\caption{Random Data Generation .}
% Define the label of the figure. It's good to use 'fig:title', so you know that the label belongs to a figure.
\label{fig:tf_plot}
\end{center}
\end{figure}
\section{16-QAM Modulation}
In these section we perform 16-Quadrature Amplitude Modulation (QAM) using qammod function.It performs modulation of all 1 x no. of data bits matrix .
\begin{figure}[!hbt]
% Center the figure.
\begin{center}
% Include the eps file, scale it such that it's width equals the column width. You can also put width=8cm for example...
\includegraphics[width=\columnwidth]{3}
% Create a subtitle for the figure.
\caption{Scatter Plot of 16-QAM modulation .}
% Define the label of the figure. It's good to use 'fig:title', so you know that the label belongs to a figure.
\label{fig:tf_plot}
\end{center}
\end{figure}
\section{Serial to Parallel}
In these section we perform parallel conversion of serial data . So we get parallel data of no. of data bits x 1 matrix form.
For that we used reshape function.\\ \\ \\ \\ \\
\begin{figure}[!hbt]
% Center the figure.
\begin{center}
% Include the eps file, scale it such that it's width equals the column width. You can also put width=8cm for example...
\includegraphics[width=\columnwidth]{4}
% Create a subtitle for the figure.
\caption{Serial to Parallel .}
% Define the label of the figure. It's good to use 'fig:title', so you know that the label belongs to a figure.
\label{fig:tf_plot}
\end{center}
\end{figure}
\section{512-IFFT of Sub-carriers}
In these section we perform 512-IFFT of parallel data. For that we use ifft function . I t is necessary that for 512-IFFT WE need minimum 512 data bits.
\begin{figure}[!hbt]
% Center the figure.
\begin{center}
% Include the eps file, scale it such that it's width equals the column width. You can also put width=8cm for example...
\includegraphics[width=\columnwidth]{5}
% Create a subtitle for the figure.
\caption{512-IFFT of Sub-Carriers .}
% Define the label of the figure. It's good to use 'fig:title', so you know that the label belongs to a figure.
\label{fig:tf_plot}
\end{center}
\end{figure}
\section{Parallel to Serial}
In these section we perform serial conversion of parallel data . So we get serial data of 1 x no. of data bits matrix form.
For that we used reshape function.
\begin{figure}[!hbt]
% Center the figure.
\begin{center}
% Include the eps file, scale it such that it's width equals the column width. You can also put width=8cm for example...
\includegraphics[width=\columnwidth]{6}
% Create a subtitle for the figure.
\caption{Parallel to Serial .}
% Define the label of the figure. It's good to use 'fig:title', so you know that the label belongs to a figure.
\label{fig:tf_plot}
\end{center}
\end{figure}
\begin{figure}[!hbt]
% Center the figure.
\begin{center}
% Include the eps file, scale it such that it's width equals the column width. You can also put width=8cm for example...
\includegraphics[width=\columnwidth]{61}
% Create a subtitle for the figure.
\caption{Scatter Plot:Parallel to Serial .}
% Define the label of the figure. It's good to use 'fig:title', so you know that the label belongs to a figure.
\label{fig:tf_plot}
\end{center}
\end{figure}
\section{Add Noise and Regenerated Signal }
In these section we generate noise in the by using awgn function and generate new signal by adding noise with output of parallel to serial section.
\begin{figure}[!hbt]
% Center the figure.
\begin{center}
% Include the eps file, scale it such that it's width equals the column width. You can also put width=8cm for example...
\includegraphics[width=\columnwidth]{7}
% Create a subtitle for the figure.
\caption{Regenerated signal of system .}
% Define the label of the figure. It's good to use 'fig:title', so you know that the label belongs to a figure.
\label{fig:tf_plot}
\end{center}
\end{figure}
\begin{figure}[!hbt]
% Center the figure.
\begin{center}
% Include the eps file, scale it such that it's width equals the column width. You can also put width=8cm for example...
\includegraphics[width=\columnwidth]{71}
% Create a subtitle for the figure.
\caption{Scatter Plot:Regenerated signal of system .}
% Define the label of the figure. It's good to use 'fig:title', so you know that the label belongs to a figure.
\label{fig:tf_plot}
\end{center}
\end{figure}
\section{Conclusion}
We studied the basic operation of OFDM Transmitter section on Matlab . The noise signal obtaining in the transmitter system is passing through receiver and check the resulted output will be our next field of project.
% Now we need a bibliography:
\begin{thebibliography}{5}
%Each item starts with a \bibitem{reference} command and the details thereafter.
\bibitem{HOP96} % Transaction paper
\url{www.skydsp.com}
\bibitem{MJH06} % Conference paper
'REDUCTION OF PAPR USING PTS AND SLM OF OFDM TRNSCIEVER SYSTEM' International Journal of Advanced Research in Electrical,
Electronics and Instrumentation Engineering
(An ISO 3297: 2007 Certified Organization)
Vol. 2, Issue 11, November 2013
\bibitem{Proakis} % Book
'Ber Calculation Using Matlab Simulation For Ofdm Transmission' Proceedings of the International MultiConference of Engineers and Computer Scientists 2008 Vol II
IMECS 2008, 19-21 March, 2008, Hong Kong
\bibitem{talk} % Web document
'OFDM (Orthogonal Frequency Division
Multiplexing) SIMULATION USING MATLAB' International Journal of Engineering Research Technology (IJERT)
Vol. 1 Issue 6, August - 2012
ISSN: 2278-0181
\end{thebibliography}
% Your document ends here!
\end{document}
