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Low rate sub-noise communication ideas?

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akorud

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Hi,
I'm looking for low rate (9600bps will be OK) wired (coax cable) communication in frequency range ~20-60MHz. The main requirement is that communication should be spread-spectrum and noise-level, i.e. "noise" floor can be slightly higher but narrow-range peaks must be avoided.
It all must be implemented in software (analog frontend accepted), probability of finding ready silicone solution is negligible.
Currently I'm looking in Chirp Spread Spectrum direction, maybe anybody can direct more precisely or propose another directions of investigations?

Thanks in advance,
Andriy Korud
 

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