[hpsdr] Correcting non-linearities in direct sampling receivers

[Guido]

In http://www.microtelecom.it/perseus the following is mentioned:
> Without preselection filters, harmonic distortion in direct sampling
receivers is the source of high spurious signals since even the best
wideband amplifiers can't provide the required 110/115 dB HD suppression.

Would it be possible to correct in software for the non-linearities of the
amplifier and ADC to improve the receiver performance in terms of spurious
free dynamic range and harmonic distortion ?
Will the receiver improve if the ADC samples are looked-up in a table that
passes the linearized version of the signal?

73,
Guido
PE1NNZ
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