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TMDSPLCKIT-V3 THE FREQUENCY TUNING OF OFDM

Igor Gorbachev
Guru 20525 points

I use TMDSPLCKIT-V3 based on F28069.
Our communication channel have a very bad frequency parameters and one is very long.
G3-library of a TMDSPLCKIT-V3 based on F28069 provides to change the start tone frequency and the number of carriers at a G3-OFDM-signal.
I have could create a G3-OFDM signal with a start-tone  1.5625kHz and 24 carriers (the resulting frequency band is about 35 kHz).
Unfortunately this band too wide for our communication channel. I'd like to reduce the frequency spacing between the G3-OFDM carriers equal to 1.5625kHz (for example like PRIME - 488 Hz or else smaller - like US GRID FLEXOFDM -122 Hz) or to reduce the minimum start tone frequency below 1.5625kHz. I'd like to create an OFDM-signal with a fraquency band < 5 kHz. Can I do it using G3-library of a TMDSPLCKIT-V3? Or what can you propose for F28069-solution? I don't like to use a FSK. I need an OFDM! There are many interferences and noises at our communication channel.