|By the very nature of the question I would have to say no you cannot receive without a receiver. Similarly you cannot transmit without a transmitter.|
I do not know of the mentioned "WIFI rxr".
I suspect it is a router that is operating on either 1 or 2 signals that would not be within the operating range of FM broadcasts. "Usually 87.5 to 108.0 MHz".
Routers operate in the 2.x GHz to 5.x GHz range.