In FHSS, is it possible for two transmitting stations to hop to the same sub-channel at the same time, that is, to collide? Justify your answer. What are the main components used to implement the...

In FHSS, is it possible for two transmitting stations to hop to the same sub-channel at the same time, that is, to collide? Justify your answer.

What are the main components used to implement the multicarrier mechanism in OFDM? How does a data stream exploit multiple carriers and travel through an OFDM channel?