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Diffstat (limited to 'chapter05/content_ch05.tex')
| -rw-r--r-- | chapter05/content_ch05.tex | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/chapter05/content_ch05.tex b/chapter05/content_ch05.tex index 033246e..8c109f7 100644 --- a/chapter05/content_ch05.tex +++ b/chapter05/content_ch05.tex @@ -742,7 +742,7 @@ For simplicity, let's consider the positive part of the spectrum only. \end{equation} \begin{definition}{Transmission bandwidth} - The \index{transmission bandwidth!narrowband phase modulation} \emph{transmission bandwidth of a narrowband \ac{PM}} is approximately the bandwidth of the information signal. + The \index{transmission bandwidth!narrowband phase modulation} \emph{transmission bandwidth of a narrowband \ac{PM}} is approximately the double of the bandwidth of the information signal. \end{definition} %\subsubsection{Narrowband Tone Modulation} @@ -1501,7 +1501,7 @@ The coherent mixer is capable of receiving all variations of the \ac{RF} signal \vspace{0.5em} - \textbf{But if the diode is a mixer, where is the \ac{LO}?} Not every \ac{AM} is suitable for non-coherent demodulation. Only those transmitting the carrier like the \ac{DSB-TC} may be used. The \ac{RF} signal consists of the modulated sidebands containing the information and the carrier. At the non-linear component, the carrier mixes with the sidebands. The sideband are moved to zero-\ac{IF}. + \textbf{But if the diode is a mixer, where is the \ac{LO}?} Not every \ac{AM} is suitable for non-coherent demodulation. Only those transmitting the carrier like the \ac{DSB-TC} may be used. The \ac{RF} signal consists of the modulated sidebands containing the information and the carrier. At the non-linear component, the carrier mixes with the sidebands. The sideband are moved to zero-\ac{IF}. The transmitted carrier replaces the local oscillator signal and its phase is aligned with the information signal. \vspace{0.5em} @@ -2139,7 +2139,7 @@ Remember that the received signal is subject to noise (thermal noise, quantizati \begin{figure}[H] \centering \begin{tikzpicture} - \node[block,draw](Det){Symbol mapping}; + \node[block,draw](Det){Data detection}; \node[block,draw,right=2cm of Det](Demod){Demodulation}; \draw[-latex] (Det.west) -- +(-2cm,0) node[left,align=right]{Reconstructed\\ data}; |