The Pa NBEMS net extensively tested (a few years ago) the OFDM modes on 80m Sunday mornings 0730 hr.
OFDM500 was very frustrating and not very robust unless we had a very strong S/N.
The 80m NVIS paths did something to mess up decoding.
We compared OFDM to the much slower MFSK32 and THOR22/44/56 ?modes for traffic (FLMSG) and finally gave up on OFDM. Then the OFDM modes were dropped from Fldigi.
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I don¡¯t miss it on on HF SSB!
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However OFDM MODES did work extremely well on 2m/70cm FM.
But we found 8PSK500F and 8PSK1000F to be more robust.
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To what extent is OFDM like VARA?
Those of us who regularly use VARA HF and VARA FM are amazed at how well it copes with noise.
And¡ VARA can adapt to changing conditions and change speed with no user input.
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That¡¯s like having a 20 speed bike on a mountain road compared to a single speed bike.
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I¡¯m curious what other ARES/RACES groups are finding as the ¡°best¡± (fast and robust) modes are on FM simplex and FM thru even an analog voice FM repeater? ?8PSK500F is my choice at this time.
MFSK128 for images.
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de k3eui barry
Philly
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K3EUI Barry