Typos and add constellation diagrams

1 files changed, 23 insertions, 0 deletions

diff --git a/doc/thesis/figures/tikz/qpsk-constellation.tex b/doc/thesis/figures/tikz/qpsk-constellation.tex
new file mode 100644
index 0000000..d927b19
--- /dev/null
+++ b/doc/thesis/figures/tikz/qpsk-constellation.tex
@@ -0,0 +1,23 @@
+% vim: set ts=2 sw=2 noet:
+\begin{tikzpicture}[
+		axis/.style = {
+			thick, -latex, black,
+		},
+		star/.style = {
+			draw = black, thick, fill = red!50,
+			circle, outer sep = 1mm, inner sep = 0,
+			minimum size = 1.5mm,
+		},
+	]
+	\draw[axis] (-25mm,0) to (25mm,0) node[right] {\(\phi_i\)};
+	\draw[axis] (0,-25mm) to (0,25mm) node[above] {\(\phi_q\)};
+
+	\draw[lightgray, densely dotted, thick] (0,0) circle (15mm);
+	\foreach \a in {0,1,...,8}{
+		\node[star] (s\a) at ({360/8*(.5 + \a)}:15mm) {};
+	}
+
+	\foreach \i/\l in {0/000,1/001,2/011,3/010,4/110,5/111,6/101,7/100}{
+		\node[lightgray] at ($(s\i) + ({360/8*(.5 + \i)}:5mm)$) {\texttt{\l}};
+	}
+\end{tikzpicture}