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Wireless LAN Technology

      Wireless LAN

The earliest wireless networking products came to market about a decade ago, operated in the 900 MHz band. Because these were proprietary designs, an effort soon ensued to pursue a vendor-independent standard, to promote interoperability. This resulted in the formation of the IEEE 802.11 committee, which quickly began to focus on the 2.4-GHz band WLAN. The approval of the 2.4-GHz 802.11 standard was finally achieved in June 1997. The WLAN market finally gained acceptance as a legitimate enterprise technology in 2000 and is now gaining momentum. With the release of Wi-Fi, IEEE 802.11b standard products from several prominent network equipment suppliers have driven WLAN gear into wider acceptance. The market continues to thrive as suppliers unveil new products with higher speeds, increased interoperability and lower prices.

The original 802.11 specification identified 1Mbps and 2Mbps data speeds in a variety of physical medium access methods for the 2.4GHz ISM frequency band. These physical layer modulation methods included frequency hopping spread spectrum (FHSS) and direct sequence spread spectrum (DSSS). This was followed by the 802.11b specification that added 5.5Mbps and 11Mbps data rates using CCK modulation. IEEE also released a physical layer implementation that uses the 5 GHz band supporting data rates up to 54Mbps called 802.11a. The spreading scheme used in this specification is Orthogonal Frequency Division Multiplexing (OFDM). Other standards are being proposed that will augment these standards well into the future.

Building on their established expertise in spread spectrum communications systems, Nuntius has the technology to build Wireless LAN solutions for today's markets as well as the future markets.

 


    Wireless LAN Standards
802.11b
802.11a

    Wireless LAN Presentations
802.11b
802.11a


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