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-rw-r--r--doc/thesis/figures/tikz/qam-modulator.tex89
1 files changed, 89 insertions, 0 deletions
diff --git a/doc/thesis/figures/tikz/qam-modulator.tex b/doc/thesis/figures/tikz/qam-modulator.tex
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+% vim: set ts=2 sw=2 noet:
+
+\begin{circuitikz}[
+ ]
+ \matrix [
+ row sep = 5mm, column sep = 7mm,
+ nodes = {
+ align = center,
+ fill = white,
+ },
+ ] {
+ & \coordinate (vmi);
+ & \node[twoportshape] (B2Li) {};
+ &
+ & \coordinate (mi);
+ &
+ & \node[mixer] (Mi) {};
+ & \coordinate (si);
+ \\
+ \node[] (M) {\(m(n)\)};
+ & \node[twoportshape] (BSp) {};
+ &
+ &
+ & \node[twoportshape] (H) {};
+ & \node[oscillator] (OSC) {};
+ & \coordinate (phii);
+ & \node[adder] (SUM) {};
+ & \node (S) {\(s(t)\)};
+ \\
+ &&&& \coordinate (phiq);
+ \\[-3mm]
+ & \coordinate (vmq);
+ & \node[twoportshape] (B2Lq) {};
+ & \coordinate (mq);
+ & \node[mixer] (Mq) {};
+ &
+ &
+ & \coordinate (sq);
+ \\
+ };
+
+ % Add missing lables
+ \node at (H.center) {\large \(\mathcal{H}\)};
+ \node at (B2Li.center) {\textsf{B2L}};
+ \node at (B2Lq.center) {\textsf{B2L}};
+ \node at (BSp) {\textsf{BSp}};
+
+ % Add connections
+ \begin{scope}[thick, -latex]
+ \draw (M) -- (BSp.west);
+
+ \draw (BSp.north) |- (B2Li.west);
+ \draw (B2Li.east) -- (Mi.west);
+ \draw (Mi.east) -| (SUM.north);
+
+ \draw (BSp.south) |- (B2Lq.west);
+ \draw (B2Lq.east) -- (Mq.west);
+ \draw (Mq.east) -| (SUM.south);
+
+ \draw (SUM) -- (S);
+
+ \draw (OSC.east) -| (Mi.south);
+ \draw (OSC.west) -- (H.east);
+ \draw (H.south) -- (Mq.north);
+ \end{scope}
+
+ % Add signal labels
+ \node[above right] at (vmi) {\(\vec{m}_i\)};
+ \node[below right] at (vmq) {\(\vec{m}_q\)};
+
+ \node[above] at (mi) {\(m_i(t)\)};
+ \node[below] at (mq) {\(m_q(t)\)};
+
+ \node[above right] at (phii) {\(\phi_i\)};
+ \node[right] at (phiq) {\(\phi_q\)};
+
+ \node[above left] at (si) {\(s_i(t)\)};
+ \node[below left] at (sq) {\(s_q(t)\)};
+
+ \begin{pgfonlayer}{background}
+ \fill[left color = white, right color = blue!20, draw = white]
+ ($(B2Li.north) + (0,1)$) coordinate (D) rectangle ($(B2Lq.south) - (3,1)$);
+ \fill[right color = white, left color = red!20, draw = white]
+ ($(B2Li.north) + (0,1)$) coordinate (A) rectangle ($(B2Lq.south) + (9,-1)$);
+
+ \node[blue!50, anchor = south east] at (D) {\bfseries\ttfamily Digital bits};
+ \node[red!50, anchor = south west] at (A) {\bfseries\ttfamily Analog waveform};
+ \end{pgfonlayer}
+\end{circuitikz}