From the course: Wireless Networking Essential Training

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IEEE 802.11n (Wi-Fi 4)

IEEE 802.11n (Wi-Fi 4)

From the course: Wireless Networking Essential Training

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IEEE 802.11n (Wi-Fi 4)

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- [Instructor] Now, let's start to compare some recent IEEE wireless standards, beginning with the IEEE 802.11n wireless standard. This is also known as Wi-Fi 4. 802.11n has been around for a while. It was released back in 2009, and you might remember that we had two frequency bands that we could use, the 2.4 and the five gigahertz bands? Well, 802.11n can operate on one or both of those bands at the same time. And the flavor of quadrature amplitude modulation that we're using is 64-QAM, and that allows us to represent six bits with a single wave form. And it's possible to combine a couple of our adjacent 20 megahertz channels to form a channel with a channel width of 40 megahertz. Also, 802.11n, the standard says we only support a single spatial stream, and the transmission method that we're using is OFDM.

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