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Regarding bandwidth, he noted, “The 802.11ac very high-throughput specification actually supports 20-MHz, 40-MHz, and 80-MHz bandwidths.
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With respect to modulation, he noted, “While 256-QAM and even 1,024-QAM have already been adopted by some wireline communications systems such as DOCSIS 3.0 digital cable, nothing more complex than 64-QAM has ever been adopted in a mass market consumer product until now.” 3 There are three strategies for increasing throughput, he wrote: employing higher order modulation schemes, increasing channel bandwidth, and increasing the number of spatial streams, and 802.11ac will make use of all three by supporting 256 QAM modulation, 80-MHz or optionally 160-MHz bandwidths, and supporting up to 8×8 MIMO. Hall, a product manager for RF and wireless test at National Instruments, elaborated on the challenges of 802.11ac test in an edition of the company’s Instrumentation Newsletter. Some of these challenges are particularly amenable to being met with modular test systems. The 802.11ac standard’s bandwidth, modulation scheme, and beamforming capability-coupled with additional features such as support for up to eight MIMO (multiple-input/multiple-output) spatial streams-all present significant challenges for test. Wireless LAN Evolution at a GlanceĪs IEEE 802.11 evolves ( Table 1), test vendors are striving to keep up. 802.11ac will be one of the most influential mobile and wireless technologies in the years to come.” 2 Given the current constraints of legacy 802.11 standards and the increased speed, capacity, coverage, and battery life that 802.11ac offers, this next generation of Wi-Fi is poised for rapid growth across all product segments. On the occasion of Broadcom’s rollout of the 802.11ac chips at January’s Consumer Electronics Show (CES) in Las Vegas, Mark Hung, a research director for wireless markets at Gartner Research, said, “Wi-Fi-enabled devices will grow from less than 1 billion units in 2010 to more than 3 billion in 2015. It will offer speeds of up to 1,300 Mb/s in the 5-GHz band. NETGEAR said the new router is up to three times faster than 802.11n routers. It incorporates Broadcom’s 5G Wi-Fi IEEE 802.11ac chips. In April, for example, NETGEAR announced the availability of the R6300, which the company called the first 802.11ac dual-band gigabit Wi-Fi router. By 2015, the firm reports, the three biggest markets for 802.11ac will be smartphones, notebooks, and tablets.Īlthough the 802.11ac standard remains unratified, chipsets and consumer products are appearing. 1 In-Stat predicts sales of Wi-Fi chipsets will reach $6.1 billion in 2015-the year when 802.11ac chipset shipments will surpass 650 million. Wireless LAN, driven by the forthcoming IEEE 802.11ac standard, is poised for significant growth as Wi-Fi capabilities are added to a host of product categories ranging from automobiles to network-attached storage.Īccording to research from NPD In-Stat, as the demand for devices with Wi-Fi connectivity grows, prices for chipsets will decrease, and Wi-Fi will increasingly penetrate markets traditionally dominated by other wireless connectivity standards, including smart meters, wireless mice, and home-automation systems.