  We consider the problem of oblivious transfer (OT) over OFDM and MIMO
wireless communication systems where only the receiver knows the channel state
information. The sender and receiver also have unlimited access to a noise-free
real channel. Using a physical layer approach, based on the properties of the
noisy fading channel, we propose a scheme that enables the transmitter to send
obliviously one-of-two files, i.e., without knowing which one has been actually
requested by the receiver, while also ensuring that the receiver does not get
any information about the other file.
