\documentclass{article}
\usepackage[dvips]{graphics}
\pagestyle{empty}
\begin{document}
\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{\rule{1cm}{1cm}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE 20}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE 22}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE 24}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\huge Sum-rate (bps/Hz)}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\Huge 20}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\Huge 30}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE Theoretical results}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE Simulation results}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE With power optimisation}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE Without power optimisation}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\Huge 10}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\huge Rician factor $K_{Rice}$}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE 10}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE 12}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE 14}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE 16}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE 18}}

\newpage
\noindent{}\rule{1cm}{0.025cm}\framebox{{\LARGE 26}}

\end{document}
