In Germany UHF stands for ultra high frequency.
Its a frequency range about 500...800MHz or so.
But its normally reserved for TV transmission.

For remote purposes typically a frequency range around 27MHz
reserved.
But I think, its also impossible to decode any code,
like on IR-remotes, since millions of different codes exist.
Additionally many different modulation methods can be used.
IR signals typically only AM modulated.

E.g. I have about 12 IR remote units at home.
And none of it have the same code as any other.


Peter