\documentclass[a4paper,12pt,twoside]{report}
\usepackage{amsthm,amssymb,amsmath}
\usepackage{graphicx} % inserting images
\usepackage{newfloat}
\usepackage{caption}
\usepackage{perpage}
\DeclareFloatingEnvironment[]{myfloat}
\usepackage{hyperref} % PDF links
\usepackage{setspace} % for switching between double/single space in document
\usepackage{fancyhdr} % package for changing Headings style
\usepackage[top=3cm,right=3cm,bottom=2.5cm,left=2.5cm]{geometry}                 
\usepackage{epsfig}
\usepackage{subfigure}
\usepackage{enumitem}
\usepackage{calc}
\usepackage{multirow}
\MakePerPage{footnote} %the perpage package command
\usepackage{tikz}
\usetikzlibrary{patterns}
\usepackage{diagbox}


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\usepackage{minitoc}
\usepackage[]{xepersian}

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\pagestyle{fancy}
\fancyhead{}
\renewcommand{\headrulewidth}{0pt}

% commands related to XePersian package
\settextfont[Scale=1]{XB Zar}
\setlatintextfont[Scale=0.9]{Times New Roman}
\setdigitfont{B Zar}
\defpersianfont\eng[Scale=0.9]{Times New Roman}
\defpersianfont\farr[Scale=1]{B Zar}
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\renewcommand{\myfloatname}{نمودار}

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\begin{document}


\begin{myfloat}
% \renewcommand{\thefootnote}{\arabic{footnote}}
 \begin{minipage}[c]{1.0\textwidth}
 \thisfancypage
\begin{center}
\begin{tikzpicture}[line width=1.5pt]%[style={very thick}]
\node (Pi) { };
\node (P) [node distance=9cm, above of=Pi]{ };
\node (PP) [node distance=0.63cm, below of=P] {\rl{ در سیستم‌های چندحاملی}};
\node (PPP) [node distance=0.13cm, above of=P] {\rl{روش‌های کاهش \lr{PAPR}}};
\node(o0) [node distance=0.25cm, below of=P] {};
\node(o1) [node distance=5cm, left of=o0] {};
\node (P1) [node distance=4.25cm, above of=o1] {\rl{روش‌های همراه با اعوجاج}};
\node (P2) [node distance=4.25cm, below of=o1] {\rl{روش‌های بدون  اعوجاج}};

\node (P25) [node distance=4.2cm, left of=P2] {};

\node (P12) [node distance=10.25cm, above of=P25] {\rl{فشردن-گسترش\LTRfootnote{Companding}}};
\node (P123) [node distance=3.73cm, left of=P12] {\rl{ مبتنی بر چندجمله‌ای (\lr{PCT}\LTRfootnote{Polynomial-based companding technique })}};
\node (P121) [node distance=1.1cm,  above of=P123]{\rl{توابع \lr{A-law} و \lr{$\mu$-law}}} ;
\node (P122) [node distance=2.2cm, above of=P123] {\rl{ یکنواخت}};
\node (P124) [node distance=1.1cm, below of=P123] {\rl{  توزیع ذوزنقه\LTRfootnote{Trapezium distribution}}};
\node (P125) [node distance=2.2cm,below of=P123] {\rl{ نمایی}};
\node (P11)[node distance=6.8cm, above of=P25] {\rl{برش}};

\node (P24) [node distance=4.4cm, left of=P2] {};  %%\node (P24) {درهم‌ریزی\LTRfootnote{Scrambling}};
\node (P23) [node distance=4.5cm, above of=P24]{};
\node (P233) [node distance=0.5cm, left of=P23]  { \rl{تطابق‌پذیری پیش از اعوجاج\LTRfootnote{Adaptive pre-distortion}}};
\node (P22) [node distance=3cm, above of=P24] {\rl{بهینه‌سازی محدب\LTRfootnote{Convex optimization}}};
\node (P21) [node distance=1.5cm, above of=P24]{\rl{درهم‌نهی\LTRfootnote{Interleaving} }} ;
\node (P240) [node distance=4.25cm, left of=P24] {};
\node (P2440) [node distance=1.1cm, left of=P24] {};
\node (P2441) [node distance=2.02cm, left of=P24] {};
\node (P24411) [node distance=0.55cm, above of=P2441]{};
\node (P24412) [node distance=0.55cm, below of=P2441]{};
\node (P2442) [node distance=2.6cm, left of=P24] {};
\node (P24421) [node distance=1.65cm, above of=P2442]{};
\node (P24422) [node distance=1.65cm, below of=P2442]{};

\node (P242) [node distance=1.65cm, above of=P240] {\rl{ذخیره تون (\lr{TR}\LTRfootnote{Tone reservation})}};
\node (P241) [node distance=0.54cm, above of=P240] {\rl{نقشه‌برداری انتخابی (\lr{SLM}\LTRfootnote{Selective mapping})}};
\node (P24temp) [node distance=0cm, left of=P24] {درهم‌ریزی\LTRfootnote{Scrambling}};
\node (P243) [node distance=0.54cm, below of=P240] {\rl{توالی انتقال جزئی (\lr{PTS}\LTRfootnote{Partial transmit sequence})}};
\node (P244) [node distance=1.65cm, below of=P240] {\rl{واردکردن تون (\lr{TI}\LTRfootnote{Tone insertion })}};


\node (P25) [node distance=1.5cm, below of=P24] {\rl{ کدگذاری }};
\node (P26) [node distance=3cm,  below of=P24] {\rl{پیش‌کدگذاری}};
\node (P27) [node distance=4.5cm,  below of=P24] {\rl{گسترش فعال منظومه\LTRfootnote{Active constellation extension}}};



\node (P01) [node distance=1.2cm, left of=P12] {};
\node (P02) [node distance=0.85cm, left of=P01] {};
\node (P021) [node distance=1.1cm, above of=P02] {};
\node (P022) [node distance=1.1cm, below of=P02] {};
\node (P03) [node distance=1cm, left of=P01] {};
\node (P031) [node distance=2.2cm, above of=P03] {};
\node (P032) [node distance=2.2cm, below of=P03] {};
\node (P04) [node distance=0.6cm, left of=P01] {};
\draw[->] (P01) to node 
{}(P021);
\draw[->] (P01) to node 
{}(P022);
\draw[->] (P01) to node 
{}(P031);
\draw[->] (P01) to node 
{}(P032);
\draw[->] (P01) to node 
{}(P04);


%\draw [ -] (-2.3,8.75) -- (-2.6,8.75) ;
\draw [ -] (-2.6,13) -- (-2.6,4.5) ;
\draw [ ->] (-2.6,13) -- (-2.9,13) ;
\draw [ ->] (-2.6,4.5) -- (-3,4.5) ;
\draw [ -] (-7,4.5) -- (-7.2,4.5) ;


\draw [ ->] (-7.2,4.5) -- (-7.9,4.5) ;
\draw [ ->] (-7.2,6) -- (-7.99,6) ;
\draw [ ->] (-7.2,7.5) -- (-7.6,7.5) ;
\draw [ ->] (-7.2,9) -- (-7.45,9) ;
\draw [ ->] (-7.2,3) -- (-7.99,3) ;
\draw [ ->] (-7.2,1.5) -- (-7.7,1.5) ;
\draw [ ->] (-7.2,0) -- (-7.45,0) ;
\draw [ -] (-7.2,9) -- (-7.2,0) ;

%\draw [ -] (-7.2,13) -- (-7.5,13) ;
\draw [ -] (-7.5,14.7) -- (-7.5,11.3) ;
\draw [ ->] (-7.5,14.7) -- (-7.9,14.7) ;
\draw [ ->] (-7.5,11.3) -- (-8.1,11.3) ;

%
\draw[->] (P2440) to node 
{}(P24411);
\draw[->] (P2440) to node 
{}(P24412);
\draw[->] (P2440) to node 
{}(P24421);
\draw[->] (P2440) to node 
{}(P24422);
\end{tikzpicture}
\end{center}
\caption{\small  روش‌های کاهش \lr{PAPR}\label{N31} }
 \end{minipage}
\end{myfloat}

\end{document}