The use of MIMO- OFDM (Orthogonal Frequency Division Multiplexing) to increase the data rate while maintaining the same spectrum as 802.11a was first demonstrated by Airgo Networks. It standardized support for multiple-input multiple-output, frame aggregation, and security improvements, among other features, and can be used in the 2.4 GHz or 5 GHz frequency bands.Īs the first Wi-Fi standard that introduced MIMO (Multiple-Input and Multiple-Output) support, sometimes devices/systems that support 802.11n standard (or draft version of the standard) are being referred to as MIMO (Wi-Fi products), especially before the introduction of the next generation standard. The Wi-Fi Alliance has also retroactively labelled the technology for the standard as Wi-Fi 4. ![]() IEEE 802.11n-2009, or 802.11n, is a wireless-networking standard that uses multiple antennas to increase data rates. *Wi-Fi 0, 1, 2, and 3 are by retroactive inference
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