This paper depicts the development of Orthogonal

Frequency Division Multiplexing a historical perspective.

A summary of major research milestones are noted that

contributed to modern-day OFDM. These contributions

include the use of discrete Fourier transforms replacing the

analog implementation and addition of cyclic extensions to

ensure orthogonality among the sub-channels. Also, channel

equalization algorithms to suppress inter-symbol interference

and inter-carrier interference, channel estimation through the

insertion of pilot tones among data blocks, peak-to-average

power ratio reduction, and synchronization techniques.-This paper depicts the development of Orthogonal

Frequency Division Multiplexing　a historical perspective.

A summary of major research milestones are noted that

contributed to modern-day OFDM. These contributions

include the use of discrete Fourier transforms replacing the

analog implementation and addition of cyclic extensions to

ensure orthogonality among the sub-channels. Also, channel

equalization algorithms to suppress inter-symbol interference

and inter-carrier interference, channel estimation through the

insertion of pilot tones among data blocks, peak-to-average

power ratio reduction, and synchronization techniques.