ATHEROS INTRODUCES SMART-ANTENNA WIRELESS CHIPSET.Atheros Communications, Inc. (NASDAQ NASDAQ in full National Association of Securities Dealers Automated Quotations U.S. market for over-the-counter securities. Established in 1971 by the National Association of Securities Dealers (NASD), NASDAQ is an automated quotation system that reports on :ATHR ATHR Autothrust System ), has introduced the new AR5005VL wireless solution that employs multiple-radio, smart-antenna technologies to deliver MIMO (Multiple Input/Multiple Output) Pronounced "my-mo," it is the use of multiple transmitters and receivers (multiple antennas) on wireless devices for improved performance. (multiple-input, multiple-output) performance and throughput to standard 802.11 WLAN See wireless LAN. WLAN - wireless local area network products. The AR5005VL chipset uses phased array beamforming, cyclic delay diversity Cyclic Delay Diversity (CDD) is a diversity scheme used in OFDM-based telecommunication systems, transforming spatial diversity into frequency diversity avoiding inter symbol interference. , and optimal receive combining to deliver higher performance even when the new chipset is only on one end of a wireless connection. The new chipset therefore enables breakthrough performance with maximum compatibility for the millions of Wi-Fi products in the market. Based on Atheros' VLocity High-Performance Wireless Technologies, the new solution is unique in its ability to boost performance when on both ends of a wireless link (multiple input and multiple output), on the transmit side only (multiple output), or on the receive side only (multiple input). As a result, home routers, enterprise access points, or public hot spots hot spots acute moist dermatitis. that use VLocity deliver higher performance with a wide array of non-MIMO wireless LAN A local area network that transmits over the air typically in the 2.4 GHz or 5 GHz unlicensed frequency band. It does not require line of sight between sender and receiver. Wireless base stations (access points) are wired to an Ethernet network and transmit a radio frequency over an area devices, including end users' existing network interface cards, laptops with embedded wireless LAN, and digital media adapters. The AR5005VL chipset is available in both 802.11g and 802.11a/g versions, supporting configurations with up to four antennas. These chipsets deliver up to 50 Mbps of actual user throughput when operating on both sides of the wireless connection. In mixed networks with a wide range of different 802.11g products, the Atheros technology delivers up to 27 Mbps of user throughput across a 3000-square-foot home even when on just one side of the link. In contrast, other MIMO products deliver less than 18 Mbps of user throughput when communicating with non-MIMO devices and fall back to a diversity-only mode that only uses just one antenna at a time. Even when these competing products are on both sides of the link, they achieve only 40 Mbps of actual throughput. The Atheros solution thus delivers significantly better throughput in any configuration, with dramatically improved throughput when on just one end of the link. "Sophisticated users demand that their access points provide 100 percent coverage as well as high bandwidth to each user in the wireless network," said Craig Barratt, president and chief executive officer of Atheros Communications. "Smart-antenna technologies improve wireless networking See wireless network. by combining the power of multiple radios with the latest generation of signal processing See DSP. capabilities. Users need this technology to work transparently with the wide range of products out there, from gaming adapters See multi-GPU. to PDAs and the latest laptops. That's where the VLocity technology comes in with MIMO performance and maximum compatibility." The AR5005VL chipset supports up to four antennas to extend range and improve network performance. Rather than rely on a proprietary pre-802.11n (pre-n) transmission method, the chipset uses multiple radio outputs to focus a coherent 802.11a/g signal towards the receiver -- combining the techniques of phased array beamforming and cyclic delay diversity -- in a way that is fully compatible with existing WLAN radios. The chipset also uses advanced signal processing techniques to combine multiple 802.11a/g radio inputs so as to improve overall signal strength and quality. This approach increases performance in any deployment scenario, maximizing compatibility with both MIMO and non-MIMO devices. Price and availability The 802.11a/g version of the AR5005VL chipset costs under $23 in 10,000-unit quantities. The 802.11g version costs under $20. The chipsets are in volume production now. About Atheros Communications, Inc. Atheros Communications is a developer of semiconductor system solutions for wireless communications wireless communications System using radio-frequency, infrared, microwave, or other types of electromagnetic or acoustic waves in place of wires, cables, or fibre optics to transmit signals or data. products. Atheros combines its wireless systems expertise with high-performance radio frequency (RF), mixed signal and digital semiconductor design skills to provide highly integrated chipsets that are manufacturable on low-cost, standard complementary metal-oxide semiconductor (CMOS (Complementary Metal Oxide Semiconductor) Pronounced "c-moss." The most widely used integrated circuit design. It is found in almost every electronic product from handheld devices to mainframes. ) processes. Atheros technology is being used by a broad base of customers, including personal computer and networking equipment manufacturers. Atheros Communications can be found on the World Wide Web at http://www.atheros.com. For more information, call 408/773-5344. |
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