Those don't look like parameters for any of the psp models that I can see in spectre (e..g "spectre -h psp103" or "psp1021" etc). Maybe they're aliases (although not documented). They look closer to the bsim4 parameters, but even then they're called noia, noib, noic (no _mul). So what you've done seems a bit surprising.
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That said, I didn't do any experiments - as I said, maybe they are aliases.