diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0e77146
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.aux
+*.log
diff --git a/term_paper.pdf b/term_paper.pdf
index 592edd5..47dbde2 100644
Binary files a/term_paper.pdf and b/term_paper.pdf differ
diff --git a/term_paper.tex b/term_paper.tex
index 504acab..0e0e8c5 100644
--- a/term_paper.tex
+++ b/term_paper.tex
@@ -10,6 +10,8 @@
 \usepackage{scrextend}
 \usepackage{graphicx}
 \usepackage{tikz}
+\usetikzlibrary{shapes.misc}
+\usepackage{pdflscape}
 
 \DeclareSymbolFont{T2Aletters}{T2A}{cmr}{m}{it}
 \graphicspath{ {./images/} }
@@ -17,33 +19,39 @@
 % Установки для отрисовки решеток кодера
 \tikzstyle{lightedge}=[dashed]
 \tikzstyle{mainedge}=[solid]
+\tikzstyle{activeedge}=[green, very thick]
 \tikzstyle{inputBit}=[rectangle,fill=red, text=white]
 \tikzstyle{outputBit}=[rectangle,fill=blue, text=white]
 \tikzstyle{pointer}=[orange,->,dashed]
 
 \newcounter{ctra}
-\newcommand{\trellisEdges}[2]{%
+\newcommand{\trellisEdges}[2]{
   \setcounter{ctra}{#2}
   \pgfmathtruncatemacro{\xplusone}{#1 + 1}
   \ifodd\value{ctra}
       \draw[mainedge] (s#1#2) -- (s\xplusone2);
   \else
       \draw[mainedge] (s#1#2) -- (s\xplusone0);
-  \fi%
+  \fi
   \ifodd\value{ctra}
       \draw[lightedge] (s#1#2) -- (s\xplusone3);
   \else
       \draw[lightedge] (s#1#2) -- (s\xplusone1);
-  \fi%
+  \fi
 }
 
 % #1=x; #2=y; #3=In; #4=Out
 \newcommand{\trellisInOut}[4]{
-  \node[inputBit] (in#1) at (#1+0.5,5) {#3};
-  \node[outputBit] (out#1) at (#1+0.5,6) {#4};
+  \node[inputBit] (in#1) at (#1+0.5,4) {#3};
+  \node[outputBit] (out#1) at (#1+0.5,5) {#4};
   \draw[pointer] (in#1) -- (#1+0.5,#2);
 }
 
+% #1=x; #2=y; #3=In
+\newcommand{\trellisIn}[2]{
+  \node[outputBit] (in#1) at (#1+0.5,4) {#2};
+}
+
 
 \author{Анатолий Копыл}
 \title{Курсовая работа}
@@ -59,9 +67,9 @@
     \hline
     Верхняя частота спектра аналогового сигнала \(f_В\) & \(f_В =(1+m\cdot 10^{-2})\cdot 10^4\) & \(f_В =14100\) \\ 
     \hline
-    Заданный уровень квантования & \(j=500-3\cdot m\) & 377 \\
+    Заданный уровень квантования & \(j=500-3\cdot m\) & 377 \\
     \hline
-    Спектральная плотность мощности флуктуационной помехи & 41 & \(N_0=2,3\cdot 10^{-7}\, В^2/Гц\)\\
+    Спектральная плотность мощности флуктуационной помехи & 41 & \(N_0=2,3\cdot 10^{-7}\, В^2/Гц\)\\
     \hline
     q - номер тактового интервала ошибки & \(q=m\mod{3}+1\) & \(q=3\)\\
     \hline
@@ -73,8 +81,8 @@
 \section{Аналого-цифровой преобразователь}
 \[ \Delta t \leq \frac{1}{2f_B}=\frac1 {2\cdot 14100} = 3,546\cdot 10^{-5}\, с \]
 \[ f_d=\frac{1}{\Delta t}\geq 2f_B=\frac{1}{3,546\cdot 10^{-5}}=28200 \]
-\[ L=2^9 = 512 \]
 \[ 377_{10}=101111001_2 \]
+\[ k=9;\, L=2^9 = 512 \]
 
 \section{Кодер}
 \begin{center}
@@ -89,68 +97,243 @@
   \end{tabular}
 \end{center}
 
+\subsection{Решетка кодера}
+
 \begin{tikzpicture}[x=1.2cm, y=-1cm]
-    \node at (-0.5,0) [left] {$s_1=00$};
-    \node at (-0.5,1) [left] {$s_2=10$};
-    \node at (-0.5,2) [left] {$s_3=01$};
-    \node at (-0.5,3) [left] {$s_4=11$};
+  \node at (-0.5,0) [left] {$s_1=00$};
+  \node at (-0.5,1) [left] {$s_2=10$};
+  \node at (-0.5,2) [left] {$s_3=01$};
+  \node at (-0.5,3) [left] {$s_4=11$};
 
-    % Nodes
-    \foreach \x in {0,...,9} {
-        \node at (\x,-.7) {$\x$};
-        \foreach \y in {0,...,3} {
-            \node (s\x\y) at (\x,\y) [circle,fill=blue] {};
-        }
+  % Nodes
+  \foreach \x in {0,...,9} {
+    \node at (\x,-.7) {$\x$};
+    \foreach \y in {0,...,3} {
+      \node (s\x\y) at (\x,\y) [circle,fill=black,scale=0.7] {};
     }
+  }
 
-    % Edges
-    \trellisEdges{0}{0}
-    \trellisEdges{1}{0}
-    \trellisEdges{1}{1}
-    \trellisEdges{2}{0}
-    \trellisEdges{2}{1}
-    \trellisEdges{2}{2}
-    \trellisEdges{2}{3}
-    \trellisEdges{3}{0}
-    \trellisEdges{3}{1}
-    \trellisEdges{3}{2}
-    \trellisEdges{3}{3}
-    \trellisEdges{4}{0}
-    \trellisEdges{4}{1}
-    \trellisEdges{4}{2}
-    \trellisEdges{4}{3}
-    \trellisEdges{5}{0}
-    \trellisEdges{5}{1}
-    \trellisEdges{5}{2}
-    \trellisEdges{5}{3}
-    \trellisEdges{6}{0}
-    \trellisEdges{6}{1}
-    \trellisEdges{6}{2}
-    \trellisEdges{6}{3}
-    \trellisEdges{7}{0}
-    \trellisEdges{7}{1}
-    \trellisEdges{7}{2}
-    \trellisEdges{7}{3}
-    \trellisEdges{8}{0}
-    \trellisEdges{8}{1}
-    \trellisEdges{8}{2}
-    \trellisEdges{8}{3}
+  % Edges
+  \trellisEdges{0}{0}
+  \trellisEdges{1}{0}
+  \trellisEdges{1}{1}
+  \foreach \x in {2,...,8} {
+    \foreach \y in {0,...,3} {
+      \trellisEdges{\x}{\y}
+    }
+  }
 
-    % Inputs and Outputs
-    \node at (-0,5) [left] {Входной бит};
-    \node at (-0,6) [left] {Выходной бит};
+  % Inputs and Outputs
+  \node at (-0.5,4) [left] {Входной бит};
+  \node at (-0.5,5) [left] {Результат};
 
-    \trellisInOut{0}{0.5}{1}{11}
-    \trellisInOut{1}{1.5}{0}{10}
-    \trellisInOut{2}{1.5}{1}{00}
-    \trellisInOut{3}{2}{1}{01}
-    \trellisInOut{4}{3}{1}{10}
-    \trellisInOut{5}{3}{1}{10}
-    \trellisInOut{6}{2.5}{1}{01}
-    \trellisInOut{7}{1}{0}{11}
-    \trellisInOut{8}{0}{1}{11}
+  \trellisInOut{0}{0.5}{1}{11}
+  \trellisInOut{1}{1.5}{0}{10}
+  \trellisInOut{2}{1.5}{1}{00}
+  \trellisInOut{3}{2}{1}{01}
+  \trellisInOut{4}{3}{1}{10}
+  \trellisInOut{5}{3}{1}{10}
+  \trellisInOut{6}{2.5}{0}{01}
+  \trellisInOut{7}{1}{0}{11}
+  \trellisInOut{8}{0.5}{1}{11}
 \end{tikzpicture}
 
+Длительность двоичного символа \(T_В\) на выходе кодера:
+\[T_В=\frac{\Delta t}{2k}=\frac{3,546\cdot 10^{-5}}{2\cdot 9}=
+1,97\cdot 10^{-6}\,с\]
 
+\section{Декодер}
+По каналу передавался код \(\overline{u}=11 10 00 01 10 10 01 11 11\).
+Ошибка произошла на тактовом интервале \(q=3\).
+Таким образом, на вход декодера поступает последовательность 
+\(\overline{Z}=11 \dot{0}0 00 01 10 10 01 11 11\). Точкой обозначен ошибочно принятый символ.
+
+\subsection{Диаграмма декодера}
+
+\begin{tikzpicture}[x=1.2cm, y=-1cm,  
+  highlight/.style={circle,fill=blue,text=white,scale=0.7}
+  ]
+
+  \node at (-0.5,0) [left] {$s_1=00$};
+  \node at (-0.5,1) [left] {$s_2=10$};
+  \node at (-0.5,2) [left] {$s_3=01$};
+  \node at (-0.5,3) [left] {$s_4=11$};
+
+  % Nodes
+  \foreach \x in {0,...,9} {
+    \node at (\x,-.7) {$\x$};
+    \foreach \y in {0,...,3} {
+      \node (s\x\y) at (\x,\y) [circle,fill=black,scale=0.7] {};
+    }
+  }
+
+  \node at (0,0) [highlight] {};
+  \node at (1,0) [highlight,label=left:{$2$}] {};
+  \node at (1,1) [highlight,label=left:{$0$}] {};
+
+  \node at (2,0) [highlight,label=left:{$0$}] {};
+  \node at (2,1) [highlight,label=left:{$2$}] {};
+  \node at (2,2) [highlight,label=left:{$1$}] {};
+  \node at (2,3) [highlight,label=left:{$1$}] {};
+
+  \node at (3,0) [highlight,label=left:{$\frac{0}{2}$}] {};
+  \node at (3,1) [highlight,label=left:{$\frac{2}{0}$}] {};
+  \node at (3,2) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (3,3) [highlight,label=left:{$\frac{1}{1}$}] {};
+
+  \node at (4,0) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (4,1) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (4,2) [highlight,label=left:{$\frac{2}{0}$}] {};
+  \node at (4,3) [highlight,label=left:{$\frac{0}{2}$}] {};
+
+  \node at (5,0) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (5,1) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (5,2) [highlight,label=left:{$\frac{0}{2}$}] {};
+  \node at (5,3) [highlight,label=left:{$\frac{2}{0}$}] {};
+
+  \node at (6,0) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (6,1) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (6,2) [highlight,label=left:{$\frac{0}{2}$}] {};
+  \node at (6,3) [highlight,label=left:{$\frac{2}{0}$}] {};
+
+  \node at (7,0) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (7,1) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (7,2) [highlight,label=left:{$\frac{2}{0}$}] {};
+  \node at (7,3) [highlight,label=left:{$\frac{0}{2}$}] {};
+
+  \node at (8,0) [highlight,label=left:{$\frac{2}{0}$}] {};
+  \node at (8,1) [highlight,label=left:{$\frac{0}{2}$}] {};
+  \node at (8,2) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (8,3) [highlight,label=left:{$\frac{1}{1}$}] {};
+
+  \node at (9,0) [highlight,label=left:{$\frac{2}{0}$}] {};
+  \node at (9,1) [highlight,label=left:{$\frac{0}{2}$}] {};
+  \node at (9,2) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (9,3) [highlight,label=left:{$\frac{1}{1}$}] {};
+
+  % Edges
+  \trellisEdges{0}{0}
+  \trellisEdges{1}{0}
+  \trellisEdges{1}{1}
+  \foreach \x in {2,...,8} {
+    \foreach \y in {0,...,3} {
+      \trellisEdges{\x}{\y}
+    }
+  }
+
+  % Inputs
+  \node at (-0.5,4) [left] {Входная пара};
+
+  \trellisIn{0}{11}
+  \trellisIn{1}{00}
+  \trellisIn{2}{00}
+  \trellisIn{3}{01}
+  \trellisIn{4}{10}
+  \trellisIn{5}{10}
+  \trellisIn{6}{01}
+  \trellisIn{7}{11}
+  \trellisIn{8}{11}
+\end{tikzpicture}
+
+\begin{tikzpicture}[x=1.2cm, y=-1cm,  
+  highlight/.style={circle,fill=blue,text=white,scale=0.7}
+  ]
+
+  \node at (-0.5,0) [left] {$s_1=00$};
+  \node at (-0.5,1) [left] {$s_2=10$};
+  \node at (-0.5,2) [left] {$s_3=01$};
+  \node at (-0.5,3) [left] {$s_4=11$};
+
+  % Edges
+  \trellisEdges{0}{0}
+  \trellisEdges{1}{0}
+  \trellisEdges{1}{1}
+  \foreach \x in {2,...,8} {
+    \foreach \y in {0,...,3} {
+      \trellisEdges{\x}{\y}
+    }
+  }
+
+  % Nodes
+  \foreach \x in {0,...,9} {
+    \node at (\x,-.7) {$\x$};
+    \foreach \y in {0,...,3} {
+      \node (s\x\y) at (\x,\y) [circle,fill=black,scale=0.7] {};
+    }
+  }
+
+  \node at (0,0) [highlight] {};
+  \node at (1,0) [highlight,label=left:{$2$}] {};
+  \node at (1,1) [highlight,label=left:{$0$}] {};
+
+  \node at (2,0) [highlight,label=left:{$0$}] {};
+  \node at (2,1) [highlight,label=left:{$2$}] {};
+  \node at (2,2) [highlight,label=left:{$1$}] {};
+  \node at (2,3) [highlight,label=left:{$1$}] {};
+
+  \node at (3,0) [highlight,label=left:{$\frac{0}{2}$}] {$\frac23$};
+  \node at (3,1) [highlight,label=left:{$\frac{2}{0}$}] {$\frac41$};
+  \node at (3,2) [highlight,label=left:{$\frac{1}{1}$}] {$\frac52$};
+  \node at (3,3) [highlight,label=left:{$\frac{1}{1}$}] {$\frac52$};
+
+  \node at (2.5,1) [text=red] {$\times$};
+  \node at (2.5,0.5) [text=red] {$\times$};
+  \node at (2.5,1.5) [text=red] {$\times$};
+  \node at (2.5,2) [text=red] {$\times$};
+  \node at (1.5,0.5) [text=red] {$\times$};
+
+  \draw[activeedge] (s00) -- (s10);
+  \draw[activeedge] (s00) -- (s11);
+  \draw[activeedge] (s10) -- (s20);
+  \draw[activeedge] (s11) -- (s22);
+  \draw[activeedge] (s20) -- (s30);
+  \draw[activeedge] (s22) -- (s31);
+  \draw[activeedge] (s11) -- (s23);
+  \draw[activeedge] (s23) -- (s32);
+  \draw[activeedge] (s23) -- (s33);
+
+  \node at (4,0) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (4,1) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (4,2) [highlight,label=left:{$\frac{2}{0}$}] {};
+  \node at (4,3) [highlight,label=left:{$\frac{0}{2}$}] {};
+
+  \node at (5,0) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (5,1) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (5,2) [highlight,label=left:{$\frac{0}{2}$}] {};
+  \node at (5,3) [highlight,label=left:{$\frac{2}{0}$}] {};
+
+  \node at (6,0) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (6,1) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (6,2) [highlight,label=left:{$\frac{0}{2}$}] {};
+  \node at (6,3) [highlight,label=left:{$\frac{2}{0}$}] {};
+
+  \node at (7,0) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (7,1) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (7,2) [highlight,label=left:{$\frac{2}{0}$}] {};
+  \node at (7,3) [highlight,label=left:{$\frac{0}{2}$}] {};
+
+  \node at (8,0) [highlight,label=left:{$\frac{2}{0}$}] {};
+  \node at (8,1) [highlight,label=left:{$\frac{0}{2}$}] {};
+  \node at (8,2) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (8,3) [highlight,label=left:{$\frac{1}{1}$}] {};
+
+  \node at (9,0) [highlight,label=left:{$\frac{2}{0}$}] {};
+  \node at (9,1) [highlight,label=left:{$\frac{0}{2}$}] {};
+  \node at (9,2) [highlight,label=left:{$\frac{1}{1}$}] {};
+  \node at (9,3) [highlight,label=left:{$\frac{1}{1}$}] {};
+
+  % Inputs and Outputs
+  \node at (-0.5,4) [left] {Входная пара};
+
+  \trellisIn{0}{11}
+  \trellisIn{1}{00}
+  \trellisIn{2}{00}
+  \trellisIn{3}{01}
+  \trellisIn{4}{10}
+  \trellisIn{5}{10}
+  \trellisIn{6}{01}
+  \trellisIn{7}{11}
+  \trellisIn{8}{11}
+\end{tikzpicture}
 
 \end{document}