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IEEE 802.11j is an IEEE 802.11 amendment that extends wireless communication and signaling for 4.9 GHz and 5 GHz band operations in Japan. IEEE 802.11j facilitates communications for outdoor, indoor and mobile applications that comply with wireless local area network (WLAN) regulations.
IEEE 802.11j is also known as IEEE 802.11j-2004.
Techopedia Explains IEEE 802.11j
IEEE 802.11j adds channels and frequencies to Japan’s 4.9 GHz and 5 GHz bands for improved performance and capacity and reduced interference with coexisting signals. IEEE 802.11j also specifies regulations and recommendations that impose requirements on the power of transmitting nodes, modes of operation, channel alignment and undesired frequency signal levels.
