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authorRefik Hadzialic2012-04-04 17:03:06 +0200
committerRefik Hadzialic2012-04-04 17:03:06 +0200
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tree0568c60c833c3f9cf017fc1bd78c73aea274ff0e /vorlagen
parentharware (diff)
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Hardware
Diffstat (limited to 'vorlagen')
-rw-r--r--vorlagen/thesis/maindoc.pdfbin207914 -> 208200 bytes
-rw-r--r--vorlagen/thesis/src/kapitel_x.tex30
2 files changed, 19 insertions, 11 deletions
diff --git a/vorlagen/thesis/maindoc.pdf b/vorlagen/thesis/maindoc.pdf
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diff --git a/vorlagen/thesis/src/kapitel_x.tex b/vorlagen/thesis/src/kapitel_x.tex
index d2f01b6..8a84abb 100644
--- a/vorlagen/thesis/src/kapitel_x.tex
+++ b/vorlagen/thesis/src/kapitel_x.tex
@@ -35,7 +35,7 @@ will be given.
\section{GSM hardware - nanoBTS}
In recent years, there has been an increasing interest in deployment of
-private cellular networks for research or in remote areas which lead to
+private cellular networks in remote areas or for research which lead to
the devolopment of diverse ``low-cost'' GSM hardware solutions. According to
ip.access\footnote{http://www.ipaccess.com}, the manufacturer of nanoBTS, it is the
most deployed BTS hardware used for coverage of ``hard-to-reach places;
@@ -53,22 +53,30 @@ The key limitation of gathering more technical data lies in
the fact that nanoBTS is not an open source hardware product however, the given
technical data are sufficient for reproducing and conducting the RRLP tests.
-Author's test system operated on the ARFCN 877 channel. ARFCN (Absolute Radio
-Frequency Channel Number) defines the uplink and downlink channel frequency insdide
-the GSM network \citep{Richard2011Master}. ARFCN 877 corresponds to the uplink frequency
-of 1,783.2 MHz and a downlink frequency of 1,878.2 MHz, where the uplink direction
-represents the direction from the nanoBTS to the mobile stations and downlink vice versa.
-
-The decision to use the ARFCN 877
-channel was derived from the fact that the channel was free, measurements were
-carried out with a spectrum analyzer built on the USRP hardware.
-
\begin{figure}[ht!]
\label{img:nanoBTS}
\centering
\includegraphics[scale=0.50]{img/nanoBTS.jpg}
\caption[]{nanoBTS with its plastic cover. Image courtesy of ip.access}
\end{figure}
+
+Author's test system operated on the ARFCN 877 channel. ARFCN (Absolute Radio
+Frequency Channel Number) defines the uplink and downlink channel frequency insdide
+the GSM network \citep{Richard2011Master}. ARFCN 877 corresponds to the uplink frequency
+of 1,783.2 MHz and a downlink frequency of 1,878.2 MHz, where the uplink direction
+represents the direction from the nanoBTS to the mobile stations and downlink the
+opposite direction. The decision to use the ARFCN 877 channel was derived from
+the fact that the channel was free, measurements were carried out with a
+spectrum analyzer built on the USRP hardware.
+
+The nanoBTS is equiped with an internal 0 dBi (nominal) omni-directional antenna. However,
+two small (30x36 mm) external antennas, one for transmission (TX) and the other one for
+reception (RX) of radio waves are used to extend the coverage area. These
+antennas are connected via an SMA connector to the nanoBTS. By using an RF amplifier
+and larger antennas, for these frequency ranges, the covered area with the GSM signal
+reception can be increased.
+
+
\section{test}
\chapter{Summary}