diff options
Diffstat (limited to 'doc/thesis/figures/tikz')
| -rw-r--r-- | doc/thesis/figures/tikz/psk-constellation.tex (renamed from doc/thesis/figures/tikz/qpsk-constellation.tex) | 0 | ||||
| -rw-r--r-- | doc/thesis/figures/tikz/qam-modulator.tex | 58 |
2 files changed, 53 insertions, 5 deletions
diff --git a/doc/thesis/figures/tikz/qpsk-constellation.tex b/doc/thesis/figures/tikz/psk-constellation.tex index d927b19..d927b19 100644 --- a/doc/thesis/figures/tikz/qpsk-constellation.tex +++ b/doc/thesis/figures/tikz/psk-constellation.tex diff --git a/doc/thesis/figures/tikz/qam-modulator.tex b/doc/thesis/figures/tikz/qam-modulator.tex index 59d989f..a55ff29 100644 --- a/doc/thesis/figures/tikz/qam-modulator.tex +++ b/doc/thesis/figures/tikz/qam-modulator.tex @@ -57,7 +57,7 @@ \draw (B2Lq.east) -- (Mq.west); \draw (Mq.east) -| (SUM.south); - \draw (SUM) -- (S); + \draw (SUM.east) -- (S); \draw (OSC.east) -| (Mi.south); \draw (OSC.west) -- (H.east); @@ -77,13 +77,61 @@ \node[above left] at (si) {\(s_i(t)\)}; \node[below left] at (sq) {\(s_q(t)\)}; + % Draw digital signals + \begin{scope}[font = \ttfamily\footnotesize, text = blue!70!white] + \node[above = 1mm of M, xshift = 2mm] {\(\ldots 1100101\)}; + \node[above = 7mm of vmi, xshift = 3mm] + {\(\overbracket[.8pt]{\,11\ldots 00\,}^{\sqrt{M} \text{ bits}}\)}; + \end{scope} + + % Draw analog waveform + \begin{scope}[font = \ttfamily\tiny] + \coordinate (O) at ($(mi)+(-2mm,10.5mm)$); + + \node[left, red!70!white, anchor = east, text width = 8mm, align = right] + at ($(O) + (-2mm,0)$) {\(2^{\sqrt{M}}\) levels}; + + \foreach \y in {-3mm,0,3mm} { + \draw[gray, densely dotted] (O) ++(-2mm,\y) -- ++(22mm,0); + } + + \draw[thick, draw = red!70!white] (O) + -- ++(3mm,0) -- ++(0,-3mm) -- ++(3mm,0) -- ++(0,6mm) + -- ++(3mm,0) -- ++(0,-3mm) -- ++(3mm,0) -- ++(0,-3mm) + -- ++(3mm,0) -- ++(0,3mm) -- ++(3mm,0); + \end{scope} + + % Draw constellation diagram + \begin{scope} + \coordinate (O) at ($(S)+(-7mm,8mm)$); + \draw[gray, -latex] (O) ++(-2mm,0) -- ++(12mm,0) node[right] {\tiny \(\phi_i\)}; + \draw[gray, -latex] (O) ++(0,-2mm) -- ++(0,12mm) node[above] {\tiny \(\phi_q\)}; + + \node[ + circle, thick, + minimum size = 3pt, + inner sep = 0, outer sep = .8pt, + draw = gray, fill = red!50!white + ] (P) at ($(O)+(5mm, 4mm)$) {}; + + \node[gray, above right] at (P) {\tiny \(s\)}; + + \draw[gray, densely dotted] + (P) -- (P |- O) + (P) -- (P -| O); + \end{scope} + + + % Background elements \begin{pgfonlayer}{background} \fill[left color = white, right color = blue!20, draw = white] - ($(B2Li.north) + (0,1)$) coordinate (D) rectangle ($(B2Lq.south) - (3,1)$); + ($(B2Li.north) + (0,1.1)$) coordinate (D) rectangle ($(B2Lq.south) - (3,1)$); \fill[right color = white, left color = red!20, draw = white] - ($(B2Li.north) + (0,1)$) coordinate (A) rectangle ($(B2Lq.south) + (9,-1)$); + ($(B2Li.north) + (0,1.1)$) coordinate (A) rectangle ($(B2Lq.south) + (9,-1)$); - \node[blue!50, anchor = south east, font = \ttfamily\bfseries, xshift = -4mm] at (D) {\bfseries\ttfamily Digital bits}; - \node[red!50, anchor = south west, font = \bfseries\ttfamily, xshift = 4mm] at (A) {Analog waveform}; + \node[blue!50, anchor = south east, font = \ttfamily\bfseries, xshift = -4mm] + at (D) {\bfseries\ttfamily Digital bits}; + \node[red!50, anchor = south west, font = \bfseries\ttfamily, xshift = 4mm] + at (A) {Analog waveform}; \end{pgfonlayer} \end{circuitikz} |