A compound noun is one that is formed from more than one word, eg systems analyst, wirecutters.

There aren't any in your sentence.

A collective noun refers to a collection, eg a group (of people), a litter (of puppies), a team (of players).

So, in your sentence, 'a group'.

A proper noun is a name, eg Tom, Fred, Obama, Paris, Iraq. None in your sentence.

What you have in your sentence is a lot of common nouns.

system, signals, air, group ('group' is both a common noun and a collective noun).

The two main classes of nouns are proper or common. Every noun is one or the other.

Best wishes, Clive