noun phrases vs. prepositional phrases

What is the relationship between a noun phrase and a prepositional phrase?

I have found out that both work as complements to each other, and that prepositional phrases work as noun phrases.

According to Head Driven Syntax, prepositional phrases are "headed" or begin with, a preposition and within the PP, there is at least a noun phrase. Noun phrase can be a made up of a noun or two nouns or three, etc. You may think that there could be a determiner in there, but the moment you add a determiner, it becomes a determined phrase.

Prepositions in my opinion are the most difficult to use and explain.