From c1db4510292b388c228d8d8dab18c6d09cc869ba Mon Sep 17 00:00:00 2001
From: Philipp Le <philipp-le-prviat@freenet.de>
Date: Tue, 30 Jun 2020 17:06:54 +0200
Subject: Note on relation of number of users and OVSF code length

---
 chapter07/content_ch07.tex | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

(limited to 'chapter07/content_ch07.tex')

diff --git a/chapter07/content_ch07.tex b/chapter07/content_ch07.tex
index 56871e7..82a4b01 100644
--- a/chapter07/content_ch07.tex
+++ b/chapter07/content_ch07.tex
@@ -1899,8 +1899,18 @@ The rules for creating the \acs{OVSF} code tree are (derived from the constructi
 
 The different code lengths have benefits and drawbacks.
 \begin{itemize}
-	\item Longer codes have lower data rates. But they have a higher processing gain and better noise immunity. Data decoding works in noisy environments with low \ac{SNR}.
-	\item Short codes give a higher data rate. However, the processing gain is less as well as the noise immunity. Data decoding may not work in noisy environments. A proper \ac{SNR} is required.
+	\item Long codes
+	\begin{itemize}
+		\item Long codes have lower data rates.
+		\item But they have a higher processing gain and better noise immunity. Data decoding works in noisy environments with low \ac{SNR}.
+		\item Furthermore, more users can use the transmission channel, because more orthogonal codes are available (see Figure \ref{fig:ch07:ovsf_code_tree}).
+	\end{itemize}
+	\item Short codes
+	\begin{itemize}
+		\item Short codes give a higher data rate.
+		\item However, the processing gain is less as well as the noise immunity. Data decoding may not work in noisy environments. A proper \ac{SNR} is required.
+		\item Less users can use the transmission channel, because less orthogonal codes are available (see Figure \ref{fig:ch07:ovsf_code_tree}).
+	\end{itemize}
 \end{itemize}
 
 \subsection{Asynchronous \acs{DS-CDMA}}
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