Introduction to Orthogonal Frequency-Division Multiplexing Seminar Topic:

Frequency division multiplexing is technologies that transfer multiple signals at one time over a single transmission path, for example cable or wireless. Every signal goes with its own unique frequency carrier which is modulated through the data text, voice etc.

Orthogonal Frequency division multiplexing spreads its spectrum that transmits the data over a high number of carriers that are slice up into different frequencies. This slicing   provides the “orthogonality” in the following technique which demodulates from the frequencies better from other. The Advantage of OFDM is high spectral efficiency, resiliency to RF interference, and lower multi-path distortion.

This is very useful because in broadcasting there are multiple like they transmitted signal arrives at the receiver using different paths having different length. OFDM is also called as multiple carrier or discrete multi tone modulation. This modulation technique is widely used in digital TV in Europe, Japan and Australia.

Uses OF OFDM:

DAB and ADSL are the most important forms of OFDM on the standard.

Wireless Local Area Networks (WAN): The communication is Point to Point using OFDM. 

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