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from the 5G NR manual shown bellow. there is a diagram i have attache. is there some intuitive explanation regarding why as the carrier spacing goes high then the slot time goes low. how are these two connect together? thanks.

https://www.sharetechnote.com/html/5G/5G_FrameStructure.html

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    $\begingroup$ Because (1) the number of symbols per slot is unchanged and (2) the higher subcarrier spacing, the shorter OFDM symbols: (1) is specified by the standard for scheduling purposes and (2) is the nature of OFDM. $\endgroup$
    – AlexTP
    Aug 27, 2022 at 20:43

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That's simply how OFDM is defined: you take N samples, do a DFT, you get N subcarriers. Since the bandwidth is always the same, the subcarrier spacing is necessarily proportional to 1/N, and due to N samples taking time proportional to N, this subcarrier spacing · symbol duration is always the same.

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