What is OFDM symbol time?

802.11ax introduces a longer OFDM symbol time of 12.8 μs , which is four times longer than the legacy symbol time of 3.2 μs. Subcarrier spacing is equal to the reciprocal of the symbol time. As a result of the longer symbol time, the subcarrier size and spacing decreases from 312.5 KHz to 78.125 KHz.

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What is meant by OFDM?

Glossary Term: OFDM Definition. Orthogonal Frequency Division Multiplexing : A method for multiplexing signals which divides the available bandwidth into a series of frequencies known as tones. Flarion uses the 5GHz channel and divides each channel into 400 discrete tones (each at slightly different frequency).

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