3 files changed, 54 insertions, 3 deletions
diff --git a/doc/thesis/Fading.bib b/doc/thesis/Fading.bib
index 61e6afa..e02f1d7 100644
--- a/doc/thesis/Fading.bib
+++ b/doc/thesis/Fading.bib
@@ -24,7 +24,41 @@
 	location   = "Anchorage, AK, USA"
 }
 
-@inproceedings{Tidal,
+@book{Flickenger2007wireless,
+	title     = {Wireless Networking in the Developing World: A practical guide to planning and building low-cost telecommunications infrastructure},
+	author    = {Flickenger, Rob},
+	year      = {2007},
+	publisher = {Hacker Friendly LLC, Seattle, WA, US}
+}
+
+
+@article{Subramanian2006rethinking,
+	title     = {Rethinking wireless for the developing world},
+	author    = {Subramanian, Lakshminarayan and Surana, Sonesh and Patra, Rabin and Nedevschi, Sergiu and Ho, Melissa and Brewer, Eric and Sheth, Anmol},
+	journal   = {IRVINE IS BURNING},
+	pages     = {43},
+	year      = {2006},
+	publisher = {Citeseer}
+}
+
+@article{Maddocks1993introduction,
+	title   = {An introduction to digital modulation and OFDM techniques},
+	author  = {Maddocks M.C.D., Newell C.},
+	journal = {BBC Research Department},
+	volume  = {10},
+	year  = {1993}
+}
+
+@inproceedings{Frederiksen2002overview,
+	title        = {An overview of OFDM and related techniques towards development of future wireless multimedia communications},
+	author       = {Frederiksen, Flemming Bjerge and Prasad, Ramjee},
+	booktitle    = {Proceedings RAWCON 2002. 2002 IEEE radio and wireless conference (Cat. No. 02EX573)},
+	pages        = {19--22},
+	year         = {2002},
+	organization = {IEEE}
+}
+
+@inproceedings{Macmillan2019tidal,
 	author    = "Macmillan, Alex and Marina, Mahesh K. and Triana, Jhair Tocancipa",
 	booktitle = "2010 INFOCOM IEEE Conference on Computer Communications Workshops",
 	title     = "Slow Frequency Hopping for Mitigating Tidal Fading on Rural Long Distance Over-Water Wireless Links",
@@ -74,3 +108,9 @@
 	author    = {Kneub\"uhler, T.},
 	year      = {2020},
 }
+
+@book{Mathis,
+	title     = {Wireless Communication},
+	author    = {{Prof. Dr. Mathis H.} and {Prof. Dr. Lang H.D.}},
+	year      = {2021},
+}
diff --git a/doc/thesis/chapters/implementation.tex b/doc/thesis/chapters/implementation.tex
index 12f8cd6..41bcecc 100644
--- a/doc/thesis/chapters/implementation.tex
+++ b/doc/thesis/chapters/implementation.tex
@@ -3,6 +3,7 @@
 \chapter{Implementation}
 
 \section{Simulaton}
+
 \section{Hardware}
 \section{Measurements}
 \section{Results}
diff --git a/doc/thesis/chapters/introduction.tex b/doc/thesis/chapters/introduction.tex
index d9e7e24..a7b0ee1 100644
--- a/doc/thesis/chapters/introduction.tex
+++ b/doc/thesis/chapters/introduction.tex
@@ -1,7 +1,17 @@
-% vim: set ts=2 sw=2 noet:
+% vim: set ts=2 sw=2 noet spell spelllang=en:
 
 \chapter{Introduction}
 
 \section{Background}
 
-Since decades now modern wireless devices have become so ubiquitous and are no longer employed under carefully chosen conditions. Cellphones and IoT devices are carried around by users and thus have to work in environments where reflexions are omnipresent. In order to efficiently develop such devices we need for mathematical models to simulate such environments.
+It is undeniable that in the last two decades modern wireless devices have become extremely ubiquitous, and are no longer employed under carefully chosen conditions.
+
+Nowadays smart phones and internet of things (IoT) devices are carried around by everyone and have to work in environments that are very far from ideal. Furthermore, next generation wireless devices in urban environments will also include vehicles (cars, buses and trains)\cite{AntonescuTB17}, where reliability of intra-vehicular communication directly translates into safety. Whereas in rural regions, developing countries as well as other low-user density areas wireless transmission links using mesh networks have become a practical alternative to wired broadband\cite{Macmillan2019tidal,Subramanian2006rethinking,Flickenger2007wireless}.
+
+All of the mentioned cases have a common problem caused by \emph{the fading effect}, which degrade the reliability of the link\cite{Mathis}. This was foreseen\cite{Frederiksen2002overview,Maddocks1993introduction} and today most modern transmission schemes implement measures to reduce the effects fading\cite{Mathis,Hsu}.
+
+\section{Task description}
+
+
+
+\section{Overview}