This demo is about Orthogonal Frequency Division Multiplexing (OFDM). OFDM is an advanced concept for wireless communications in the air or underwater. It uses multiple sub-carriers instead of the conventional method of single-carrier. OFDM has major advantages in coping with difficult channel conditions and better security. The demo shows simulation of OFDM with hardware acceleration in Verilog and results in digital simulation and waves in time domain.