cccb: convert slides to 16:9 + adjust image scaling + fix typos
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@ -1,4 +1,4 @@
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\documentclass[11pt]{beamer}
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\documentclass[aspectratio=169,11pt]{beamer}
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\usetheme{default}
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%\setbeamertemplate{frametitle}{}
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\newenvironment{myline}
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@ -137,12 +137,12 @@ What do we learn from this?
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\begin{frame}{Simplified Rx/Tx chain}
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\begin{itemize}
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\item Simplified Receiver chain:
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\digraph[scale=0.30]{rxsimple}{
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\digraph[scale=0.38]{rxsimple}{
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rankdir=LR;
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Antenna -> Duplexer -> RF_Filter -> LNA -> Mixer -> BB_Filter -> ADC -> PHY -> L2_L3
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}
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\item Simplified Transmitter chain:
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\digraph[scale=0.30]{txsimple}{
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\digraph[scale=0.38]{txsimple}{
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rankdir=RL;
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L2_L3 -> PHY -> DAC -> BB_Filter -> Mixer -> PA -> RF_Filter -> Duplexer -> Antenna;
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}
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@ -153,16 +153,16 @@ What do we learn from this?
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\begin{frame}{Even more Simplified Rx/Tx chain}
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\begin{itemize}
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\item Simplified Receiver chain:
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\digraph[scale=0.40]{rxsimple2}{
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\item Even more simplified Receiver chain:
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\digraph[scale=0.45]{rxsimple2}{
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rankdir=LR;
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Antenna -> Mixer [label=RF];
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Mixer -> ADC [label="Analog Baseband"];
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ADC -> PHY [label="Digital Baseband"];
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PHY -> L2_L3 [label="Primitives"];
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}
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\item Simplified Transmitter chain:
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\digraph[scale=0.40]{txsimple2}{
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\item Even more simplified Transmitter chain:
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\digraph[scale=0.45]{txsimple2}{
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rankdir=RL;
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L2_L3 -> PHY [label="Primitives"];
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PHY -> DAC [label="Digital Baseband"];
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@ -180,7 +180,7 @@ What do we learn from this?
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\begin{columns}
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\column{0.28\linewidth}
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\centering
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\includegraphics[width=36mm]{RBS2206.jpg}
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\includegraphics[width=37mm]{RBS2206.jpg}
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\column{0.70\linewidth}
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The traditional way of building cell sites:
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\begin{itemize}
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@ -197,10 +197,10 @@ What do we learn from this?
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\begin{frame}{Slightly less Classic Cell Site}
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\begin{columns}
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\column{0.28\linewidth}
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\column{0.35\linewidth}
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\centering
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\includegraphics[width=36mm]{nokia_flexi.jpeg}
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\column{0.70\linewidth}
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\includegraphics[width=49mm]{nokia_flexi.jpeg}
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\column{0.65\linewidth}
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The fist step of logical evolution:
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\begin{itemize}
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\item equipment becomes smaller (partial rack)
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@ -265,7 +265,7 @@ Solution: Instead of moving all equipment up the tower,
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\begin{frame}{Base Station split with Radio Heads}
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\begin{itemize}
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\item Incredibly Simplified Receiver chain:
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\digraph[scale=0.30]{rxsimple2split}{
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\digraph[scale=0.42]{rxsimple2split}{
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rankdir=LR;
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Antenna -> Mixer [label=RF];
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subgraph cluster_0 {
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@ -279,7 +279,7 @@ Solution: Instead of moving all equipment up the tower,
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}
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}
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\item Incredibly Simplified Transmitter chain:
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\digraph[scale=0.30]{txsimple2split}{
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\digraph[scale=0.42]{txsimple2split}{
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rankdir=RL;
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subgraph cluster_0 {
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label="Baseband Unit";
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@ -304,7 +304,7 @@ Solution: Instead of moving all equipment up the tower,
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\end{frame}
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\begin{frame}{Cell Sites with (Remote) Radio Heads}
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\includegraphics[width=92mm]{lots-of-radioheads.jpeg}
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\includegraphics[width=85mm]{lots-of-radioheads.jpeg}
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{\tiny Image: Peter Schmidt @33dBm}
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\end{frame}
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@ -417,7 +417,7 @@ As digital baseband samples are transmitted over fiber optics
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\end{frame}
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\begin{frame}{Antennas with many ports}
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\includegraphics[width=85mm]{multiport-antenna.jpg}
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\includegraphics[width=80mm]{multiport-antenna.jpg}
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\end{frame}
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\begin{frame}{Where will it end?}
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@ -479,7 +479,7 @@ As digital baseband samples are transmitted over fiber optics
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\begin{frame}{Classic 3G back-haul}
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\begin{itemize}
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\item 3G (UMTS) was specified when ATM was the next hot thing
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\item back-haul of eNodeB is done via ATM
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\item back-haul of NodeB is done via ATM
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\item in reality, often Inverse ATM Multiplex (ATM over 4xE1 ISDN)
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\item 3GPP at least later adapted specs for IP based transport
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\begin{itemize}
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@ -582,7 +582,7 @@ As digital baseband samples are transmitted over fiber optics
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\begin{itemize}
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\item \url{http://cpri.info/}
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\item FlexiWCDMA teardown: \url{https://www.youtube.com/watch?v=d5xT4p9FXIw}
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\item Ericsson RBS600 teardown: \url{https://www.youtube.com/watch?v=qO127zY3voE}
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\item Ericsson RBS6000 teardown: \url{https://www.youtube.com/watch?v=qO127zY3voE}
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\end{itemize}
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\end{frame}
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