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Orthogonal Frequency Division Multiplexing (OFDM)

Orthogonal Frequency Division Multiplexing (OFDM)

From the course: Wireless Networking Essential Training

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Orthogonal Frequency Division Multiplexing (OFDM)

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- [Narrator] In our previous video we mentioned that, with frequency division multiplexing, or FDM, we could have adjacent subchannels interfere with one another. A way to prevent that potential interference is to send those adjacent subchannels at right angles to one another. When the waveforms are at right angles to one another, we say that they are orthogonal to one another. And if they're orthogonal to one another, they're not going to interfere with each other. That's the benefit of using OFDM, or orthogonal frequency division multiplexing. In other words, since we're sending these adjacent subchannels at right angles to one another, they don't interfere with each other. And we're going to see later that this technique of OFDM, it's going to be used by the 802.11n and 802.11ac wireless standards.

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