IEEE 802.11a-1999 or 802.11a was an amendment to the IEEE 802.11 wireless local network specifications that defined requirements for an orthogonal frequency-division multiplexing (OFDM) communication system. It was originally designed to support wireless communication in the unlicensed national information infrastructure (U-NII) bands (in the 5 ...

IEEE 802.11 is part of the IEEE 802 set of local area network (LAN) technical standards, and specifies the set of medium access control (MAC) and physical layer (PHY) protocols for implementing wireless local area network (WLAN) computer communication.

1999年9月16日 · Protocols, procedures, and managed objects to enhance the ability of IEEE 802.11 media to provide transit links internal to IEEE 802.1Q bridged networks are specified in this amendment to IEEE Std 802.11-2016.

2024年3月6日 · The IEEE 802.11 standard, commonly known as Wi-Fi, outlines the architecture and defines the MAC and physical layer specifications for wireless LANs (WLANs). Wi-Fi uses high-frequency radio waves instead of cables for connecting the devices in LAN.

2024年6月28日 · 802.11a (Wi-Fi 2) While 802.11b was in development, IEEE created a second extension to the original 802.11 standard called 802.11a. Because 802.11b gained popularity much faster than 802.11a, some folks believe that 802.11a was created after 802.11b. In fact, 802.11a was created at the same time.

Abstract: Changes and additions to IEEE Std. 802.11-1999 are provided to support the new highrate physical layer (PHY) for operation in the 5 GHz band. Scope: To develop a Higher Speed PHY for use in fixed, moving or portable Wireless Local Area Networks.

2014年7月16日 · 802.11a. While 802.11b was in development, IEEE created a second extension to the original 802.11 standard called 802.11a. Because 802.11b gained in popularity much faster than did 802.11a, some folks believe that 802.11a was created after 802.11b. In fact, 802.11a was created at the same time.

the IEEE 802.11a standard is 0.3125 MHz (for a 20 MHz with 64 possible subcarrier frequency slots). 802.11a standard, the primary purpose of the OFDM PHY is to transmit Media Access Control (MAC) Protocol Data Units (MPDUs) as directed by the 802.11 MAC layer.

2024年12月30日 · The IEEE 802.11 standards set the benchmarks for wireless local area networks (WLAN). Since its inception, the 802.11 family has evolved significantly, with each updated standard introducing enhanced bandwidth, robustness, and connectivity options.

2020年12月12日 · 802.11a is an IEEE standard for transmitting data over a wireless network. It uses a 5 GHz frequency band and supports data transfer rates of 54 Mbps, or 6.75 megabytes per second. The 802.11a standard was released in 1999, around the same time as 802.11b.