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December 10, 2019, 10:25:48 AM
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DMT - inter-tone spacing
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Topic: DMT - inter-tone spacing (Read 421 times)
Weaver
Addicted Kitizen
Posts: 7871
Retd sw dev; A&A; 4 × 7km ADSL2; IPv6; Firebrick
DMT - inter-tone spacing
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on:
January 01, 2019, 02:13:26 AM »
Say I am designing a DMT / OFDM system, how do I decide on the frequency spacing between the tones / carriers ?
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CarlT
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Posts: 1187
Next generation network design and deployment
Re: DMT - inter-tone spacing
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Reply #1 on:
January 01, 2019, 09:25:21 AM »
You defer to people with doctorates in the required disciplines and let them decide
More seriously it depends on absolutely tons of stuff. How good you expect the transmitters and receivers to be, the media the signal is propagating through, the frequency range in use, etc.
This might help given I'm a cable guy - here're the physical layer specifications for DOCSIS 3.1 which uses OFDM - for obvious reasons given this is the actual specification the level of detail is very high, and as a bonus it's free.
https://specification-search.cablelabs.com/CM-SP-PHYv3.1
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DMT - inter-tone spacing