[Battlemesh] Why does .11ax increase the guard interval?

Juliusz Chroboczek jch at pps.univ-paris-diderot.fr
Thu Feb 2 01:47:59 CET 2017

> Does anyone understand why .11ax increases the guard interval?

I found the answer here:


It turns out that .11ax aims to improve behaviour in non-line-of-sight
outdoors situations, where multipath issues are more severe than in the
usual cases (indoors nLOS, outdoors LOS).  To that, they:

  - increase the symbol time (and therefore the size of the FFT);
  - increase the guard interval.

I'm not sure what problems outdoors nLOS is supposed to solve, but if the
problem does exist, it makes sense to relax the timing parameters.

-- Juliusz

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