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Diffstat (limited to 'chapter07')
| -rw-r--r-- | chapter07/content_ch07.tex | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/chapter07/content_ch07.tex b/chapter07/content_ch07.tex index 82a4b01..6426c07 100644 --- a/chapter07/content_ch07.tex +++ b/chapter07/content_ch07.tex @@ -1266,7 +1266,7 @@ The increased bandwidth makes frequency-division spread spectrum techniques unat \begin{itemize} \item The sinc-function has a special property. It has \emph{zeros} at each $f = k \cdot \frac{1}{T_{sym,M}}$ (or as an angular freuqency $\omega = k \cdot \frac{2\pi}{T_{sym,M}}$) for all integer values except zero $k \in \mathbb{Z} \ \left\{0\right\}$. \item If the centre frequency (sub-carrier frequency) of the neighbouring sub-bands were at these zeros of the sinc-function, the inter-carrier interference would be minimal. - \item Because the sub-carrier frequency is in a zero of the sin-function, \textbf{all sub-carriers are orthogonal}. + \item Because the sub-carrier frequency is in a zero of the sinc-function, \textbf{all sub-carriers are orthogonal}. \item This means that the optimal spacing between the carriers of the sub-bands $\Delta f_{sc-sc}$ (the \index{sub-carrier spacing} \textbf{sub-carrier spacing}) is \begin{equation} \Delta f_{sc-sc} = \frac{1}{T_{sym,M}} = f_{sym,M} |