\usepackage{diagbox}

\documentclass{article}
 \usepackage{multirow}

\usepackage{xepersian}
%\usepackage{slashbox}

\begin{document}
\begin{table}[h]

\scriptsize

\centering
\caption{نتایج حاصل از مطالعه شبیه‌سازی}\label{tab1}
\\
\\

\begin{tabular} {|{c}{c}{c}{c}{c}{c}{c}{c}{c}{c}{c}{c}{c}{c}{c}{c}|}  
\hline
\\
تداخل مولفه‌ها
&&&&&&&(++)
\\
\cline{2-16}
\\
اندازه ماتریس
&\multicolumn{4}{c}{$50\times 30$}&&& \multicolumn{3}{c}{$50\times 30$}&& \multicolumn{4}{c}{$50\times 12$}& \\

\hline
\hline
\\

  \multirow{4}{*}{$ICL_{BIC}$}&\multicolumn{1}{c|}{ \slashbox[0.5cm]{\,\,\,m}{g}}&2 &3 &4&&\multicolumn{1}{c|}{ \slashbox[0.5cm]{\,\,\,m}{g}}&2& 3& 4&&\multicolumn{1}{c|}{ \slashbox[0.5cm]{\,\,\,m}{g}}&2& 3& 4&

  \\
  \cline{2-5}\cline{7-10}\cline{12-15}

 &\multicolumn{1}{c|}{2}&1 &2 &3&&\multicolumn{1}{c|}{2}&1& 2& 3&&\multicolumn{1}{c|}{2}&1& 2& 3&&&
  \multicolumn{1}{c|}{3}&1& 2& 3&&\multicolumn{1}{c|}{3}&1 &2& 3&&\multicolumn{1}{c|}{3}&1 &2& 3&\\

 &\multicolumn{1}{c|}{4}&1 &2 &3&&\multicolumn{1}{c|}{4}&1& 2& 3&&\multicolumn{1}{c|}{4}&1& 2& 3&&&

  \\
 \multirow{4}{*}{$BIC$}&\multicolumn{1}{c|}{ \slashbox[0.5cm]{\,\,\,m}{g}}&2 &3 &4&&\multicolumn{1}{c|}{ \slashbox[0.5cm]{\,\,\,m}{g}}&2& 3& 4&&\multicolumn{1}{c|}{ \slashbox[0.5cm]{\,\,\,m}{g}}&2& 3& 4&
 

\\
  \cline{2-5}\cline{7-10}\cline{12-15}

 &\multicolumn{1}{c|}{5}&1 &2 &3&&\multicolumn{1}{c|}{5}&1& 2& 3&&\multicolumn{1}{c|}{5}&1& 2& 3&&&
  \multicolumn{1}{c|}{5}&1& 2& 3&&\multicolumn{1}{c|}{5}&1 &2& 3&&\multicolumn{1}{c|}{5}&1 &2& 3&\\

 &\multicolumn{1}{c|}{5}&1 &2 &3&&\multicolumn{1}{c|}{5}&1& 2& 3&&\multicolumn{1}{c|}{5}&1& 2& 3&&&
  \multicolumn{1}{c|}{5}&1& 2& 3&&\multicolumn{1}{c|}{5}&1 &2& 3&&\multicolumn{1}{c|}{5}&1 &2& 3&\\
\\


  \multirow{4}{*}{$ICL$واقعی }&\multicolumn{1}{c|}{ \slashbox[0.5cm]{m}{g}}&2 &3 &4&&\multicolumn{1}{c|}{ \slashbox[0.5cm]{\,\,\,m}{g}}&2& 3& 4&&\multicolumn{1}{c|}{ \slashbox[0.5cm]{\,\,\,m}{g}}&2& 3& 4&

  \\
  \cline{2-5}\cline{7-10}\cline{12-15}

 &\multicolumn{1}{c|}{2}&1 &2 &3&&\multicolumn{1}{c|}{2}&1& 2& 3&&\multicolumn{1}{c|}{2}&1& 2& 3&&&
  \multicolumn{1}{c|}{3}&1& 2& 3&&\multicolumn{1}{c|}{3}&1 &2& 3&&\multicolumn{1}{c|}{3}&1 &2& 3&\\

 &\multicolumn{1}{c|}{4}&1 &2 &3&&\multicolumn{1}{c|}{4}&1& 2& 3&&\multicolumn{1}{c|}{4}&1& 2& 3&&&
 \\


1&2&3&4&5&6&7&8&9&10&11&12&13&14&15&16\\

\hline
 \end{tabular}

 \label{tb:1}
\end{table}

\end{document}