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Application Notes
Introduction
802.11g is the latest standard in wireless computer networking. It follows on the developments of 802.11a and 802.11b, combining the speed of 802.11a with the low cost and installed base of 802.11b devices. The aim of 802.11g – to be interoperable with 802.11b and have acceptable performance, cost, and design time – leads to some unique measurement challenges. Over the last few years, 802.11b-based wireless networking has been an enormous success, with sales growing at about 10% per quarter. This growth has been driven by the immense growth in affordable high-speed Internet access at home as well as the office. 802.11b provides an excellent wireless channel for Internet connections, but it often lacks the speed required for transferring files and performing other large dataset networking tasks within the intranet. 802.11g expects to fix this by offering data rates as high as 54 Mbps while maintaining compatibility with legacy 11-Mbps 802.11b devices and networks. 802.11g will get increased data transfer rates by using the orthogonal frequency division multiplexing (OFDM) modulation technique that is used in 802.11a, while maintaining the timing and frequency arrangements from 802.11b.
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