Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation technique which overcomes the limitation of single carrier transmission. OFDM implementation is discussed in detailed with background knowledge of Multipath Channel and Channel Delay Spread. Orthogonality among sub-carriers, Cyclic Prefix and PAPR concept are elaborated. #ofdm #fft #papr #frequency #multipath #beamforming #communication #wirelesscommunication #Cyclicprefix