Hi all,
How many sub-channels will be available in mm-wave communication?
If OFDMA will be used as the multiplexing technique, then in a given TTI, how many users could be served, assuming that one user demand equals single resource block?
What will be TTI in mm-wave communications?
Probably not set in stone yet, if you are talking about 5G cellular. But if you use WiFi and 4G as a guide, your can expect channel widths of at least 80 MHz and 160 MHz, even if aggregated from smaller slices, in 5G cellular.
Distance between subcarriers will need to be adjusted according to the use case, I would expect. For fixed service, Doppler shift is not an issue, and distances can be small. For mobile service, especially at multiple GHz, Doppler shift is an issue. You'll note that 4G in 20 MHz channels uses 2K mode, for example, to be tolerant of Doppler shift.
http://www.tsiwireless.com/docs/whitepapers/LTE%20in%20a%20Nutshell%20-%20Physical%20Layer.pdf
Everything is scaled up, when you want to allow for up to 10 Gb/s aggregate capacity for a single channel.
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