IEEE 802.11n

Uncommon card · No. 159190

IEEE 802.11n, formally IEEE 802.11n-2009 and also simply called 802.11n, is a wireless-networking standard that uses multiple antennas to increase data rates. The Wi-Fi Alliance has also retroactively labelled the technology for the standard as Wi-Fi 4. It standardized support for multiple-input multiple-output (MIMO), frame aggregation, and security improvements, among other features, and can be used in the 2.4 GHz or 5 GHz frequency bands. Being the first Wi-Fi standard to introduce MIMO support, devices and systems which supported the 802.11n standard (or draft versions thereof) were sometimes referred to as MIMO Wi-Fi products, especially prior to the introduction of the next generation standard. 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. The purpose of the standard is to improve network throughput over the two previous standards—802.11a and 802...

Read on Wikipedia