MIMO Wireless LAN to Hit 160Mbps in 2005 "The second-generation chipset coming out in 2005 will boost the effective data rate (speed at the service access point of the MAC layer) to 160Mbps," said Beau Beck, executive director in charge of strategic development at Airgo Networks, Inc of the US.
Airgo, which develops high-speed wireless local area network (LAN) chipsets, recently disclosed its development plan for the second-generation product, following on from the original product announced in August 2003. The electronics start-up was the first firm to implement multiple-input multiple-output (MIMO), which uses multiple antennas and spatial multiplexing to boost the data rate, in a chipset. While wireless LAN protocols like IEEE802.11a and .11g offer physical layer speeds of 54Mbps and effective data rates of over 20Mbps, Airgo's second-generation chipset will deliver six times the performance. Beck believes that the high-speed wireless LAN market will be driven by corporate applications for some time to come, but that "consumer electronics handling video signals represents the largest potential market." He feels that it will penetrate the home network, providing Internet connection simultaneously with send/receive handling of high-definition (HDTV) and standard-definition television (SDTV) signals. Another technology candidate for high-speed wireless communication in home networks is ultra wideband (UWB), which is being considered for deregulation in Japan. UWB has a high physical layer speed of 480Mbps to 1Gbps and a probable module dissipation of under 500mW, but a short range of only about 10m. Airgo is pushing ahead with commercialization of MIMO-based wireless LAN because a range of 100m covers the entire home, and the current regulatory environment means it can be used today. Quadrupling Speed The second-generation Airgo design simultaneously uses two channels, each with 20MHz bandwidth, to double the physical layer speed. It is also one of the first implementations to use the Media Access Control (MAC) scheme proposed for adoption in IEEE802.11n, the next-generation wireless LAN standard. While details of the new MAC method have not been disclosed, it is said to be an improved version of the enhanced distributed coordination function (EDCF) MAC method used in IEEE802.11e to assure quality of service (QoS). The firm will apparently be the first to introduce it. The IEEE802.11n standard is expected to provide an effective speed of 100Mbps, with proposals having been accepted through to the end of August 2004 and full-scale standardization to start from September 2004. According to Beck, two major groups have formed, one consisting of Airgo, Broadcom Corp of the US, Conexant Systems, Inc of the US, Texas Instruments Inc of the US and others, and the second including firms like Intel Corp of the US, Agere Systems Inc of the US and Sony Corp of Japan. The major problem in the development of Airgo's second-generation chipset is dissipation, because it must drive multiple radio frequency (RF) modules. Beck commented that the development target for the miniPCI board's power consumption is 25 to 30% lower than the 2.5W drawn by the first-generation design, but even so the total would be higher than that of wireless LAN modules (see Fig). For the time being, Airgo is aiming at non-mobile units. by Takahiro Kikuchi source : September 2004 Issue, Nikkei Electronics Asia __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com [Non-text portions of this message have been removed] -- www.ITCENTER.or.id - Komunitas Teknologi Informasi Indonesia Info, Gabung, Keluar, Mode Kirim : [EMAIL PROTECTED] ::: Hapus bagian yang tidak perlu (footer, dst) saat reply! ::: ## Forum: ITCENTER.or.id/forum ## Jobs: ITCENTER.or.id/jobs ## Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/ITCENTER/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
