diff options
| -rw-r--r-- | 2019/cccb-cellular_base_station_technology/cellular_base_station_technology.tex | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/2019/cccb-cellular_base_station_technology/cellular_base_station_technology.tex b/2019/cccb-cellular_base_station_technology/cellular_base_station_technology.tex index 47f7cad..afb9bc5 100644 --- a/2019/cccb-cellular_base_station_technology/cellular_base_station_technology.tex +++ b/2019/cccb-cellular_base_station_technology/cellular_base_station_technology.tex @@ -1,4 +1,4 @@ -\documentclass[11pt]{beamer} +\documentclass[aspectratio=169,11pt]{beamer} \usetheme{default} %\setbeamertemplate{frametitle}{} \newenvironment{myline} @@ -137,12 +137,12 @@ What do we learn from this? \begin{frame}{Simplified Rx/Tx chain} \begin{itemize} \item Simplified Receiver chain: -\digraph[scale=0.30]{rxsimple}{ +\digraph[scale=0.38]{rxsimple}{ rankdir=LR; Antenna -> Duplexer -> RF_Filter -> LNA -> Mixer -> BB_Filter -> ADC -> PHY -> L2_L3 } \item Simplified Transmitter chain: -\digraph[scale=0.30]{txsimple}{ +\digraph[scale=0.38]{txsimple}{ rankdir=RL; L2_L3 -> PHY -> DAC -> BB_Filter -> Mixer -> PA -> RF_Filter -> Duplexer -> Antenna; } @@ -153,16 +153,16 @@ What do we learn from this? \begin{frame}{Even more Simplified Rx/Tx chain} \begin{itemize} - \item Simplified Receiver chain: -\digraph[scale=0.40]{rxsimple2}{ + \item Even more simplified Receiver chain: +\digraph[scale=0.45]{rxsimple2}{ rankdir=LR; Antenna -> Mixer [label=RF]; Mixer -> ADC [label="Analog Baseband"]; ADC -> PHY [label="Digital Baseband"]; PHY -> L2_L3 [label="Primitives"]; } - \item Simplified Transmitter chain: -\digraph[scale=0.40]{txsimple2}{ + \item Even more simplified Transmitter chain: +\digraph[scale=0.45]{txsimple2}{ rankdir=RL; L2_L3 -> PHY [label="Primitives"]; PHY -> DAC [label="Digital Baseband"]; @@ -180,7 +180,7 @@ What do we learn from this? \begin{columns} \column{0.28\linewidth} \centering - \includegraphics[width=36mm]{RBS2206.jpg} + \includegraphics[width=37mm]{RBS2206.jpg} \column{0.70\linewidth} The traditional way of building cell sites: \begin{itemize} @@ -197,10 +197,10 @@ What do we learn from this? \begin{frame}{Slightly less Classic Cell Site} \begin{columns} - \column{0.28\linewidth} + \column{0.35\linewidth} \centering - \includegraphics[width=36mm]{nokia_flexi.jpeg} - \column{0.70\linewidth} + \includegraphics[width=49mm]{nokia_flexi.jpeg} + \column{0.65\linewidth} The fist step of logical evolution: \begin{itemize} \item equipment becomes smaller (partial rack) @@ -265,7 +265,7 @@ Solution: Instead of moving all equipment up the tower, \begin{frame}{Base Station split with Radio Heads} \begin{itemize} \item Incredibly Simplified Receiver chain: -\digraph[scale=0.30]{rxsimple2split}{ +\digraph[scale=0.42]{rxsimple2split}{ rankdir=LR; Antenna -> Mixer [label=RF]; subgraph cluster_0 { @@ -279,7 +279,7 @@ Solution: Instead of moving all equipment up the tower, } } \item Incredibly Simplified Transmitter chain: -\digraph[scale=0.30]{txsimple2split}{ +\digraph[scale=0.42]{txsimple2split}{ rankdir=RL; subgraph cluster_0 { label="Baseband Unit"; @@ -304,7 +304,7 @@ Solution: Instead of moving all equipment up the tower, \end{frame} \begin{frame}{Cell Sites with (Remote) Radio Heads} -\includegraphics[width=92mm]{lots-of-radioheads.jpeg} +\includegraphics[width=85mm]{lots-of-radioheads.jpeg} {\tiny Image: Peter Schmidt @33dBm} \end{frame} @@ -417,7 +417,7 @@ As digital baseband samples are transmitted over fiber optics \end{frame} \begin{frame}{Antennas with many ports} -\includegraphics[width=85mm]{multiport-antenna.jpg} +\includegraphics[width=80mm]{multiport-antenna.jpg} \end{frame} \begin{frame}{Where will it end?} @@ -479,7 +479,7 @@ As digital baseband samples are transmitted over fiber optics \begin{frame}{Classic 3G back-haul} \begin{itemize} \item 3G (UMTS) was specified when ATM was the next hot thing - \item back-haul of eNodeB is done via ATM + \item back-haul of NodeB is done via ATM \item in reality, often Inverse ATM Multiplex (ATM over 4xE1 ISDN) \item 3GPP at least later adapted specs for IP based transport \begin{itemize} @@ -582,7 +582,7 @@ As digital baseband samples are transmitted over fiber optics \begin{itemize} \item \url{http://cpri.info/} \item FlexiWCDMA teardown: \url{https://www.youtube.com/watch?v=d5xT4p9FXIw} - \item Ericsson RBS600 teardown: \url{https://www.youtube.com/watch?v=qO127zY3voE} + \item Ericsson RBS6000 teardown: \url{https://www.youtube.com/watch?v=qO127zY3voE} \end{itemize} \end{frame} |