However, you could use more general collective nouns depending on the context, such as:
* Pile: "A pile of carpets"
* Collection: "A collection of Persian carpets"
* Selection: "A selection of carpets in different colors"
* Assortment: "An assortment of carpets for sale"
You could also use a descriptive phrase like:
* A swathe of carpet
* A tapestry of carpets
* A sea of carpet