What is Bluetooth Technology?

Bluetooth technology which apart from Ericsson, has gained the support of Nokia, IBM, Toshiba, Intel and many other manufacturers

eliminates the need for wires, cables and connectors for and between cordless or mobile phones, modems, headsets,PDAs, Computers, printers, projectors, local area networks, and so on, and paves the way for new and completely different devices and applications.Technology Characteristics

1Ms/s symbol rate exploits maximum available channel bandwidth

Fast frequency hopping avoids interference

Adaptive output power minimizes interference

Short data packets maximize capacity during interference

Fast acknowledge allows low coding overhead for links

CVSD (Continuous Variable Slope Delta Modulation) voice coding enables

operation at high bit- error rates

Flexible packet types supports wide application range

Air interface tailored to minimize current consumption

Basic Technical Information—Based upon a small , high performance integrated radio transceiver ,each of which is allocated a unique 48-bit address derived from the IEEE 802·standard .

Operate in the unrestricted 2.45GHz ISM free band, Which is available globally although slight variation of location and width of band apply

Range set at 10m to optimize for target market of mobile and business user

Gross data rate 1Mbit/s with second generation plans to increase to 1Mbit/s

One-to-one connections allow maximum data transfer rate of 721kbit/s (3 voice channels)

Uses packet switching protocol based on frequency hop scheme with 1600 hops/s to enable high performance in noisy radio environments .The entire available frequency spectrum is used with 79 hops of 1Mhz bandwidth , analogous to the IEEE 802.11 standard

Low power consumption longevity for battery powered devices . During data transfer the maximum current drain is 30mA. However during pauses or at lower data rates will be lower实践证明经常访问无忧英语教育网 www.51education.net ,能迅速提高你的英语学习能力!积沙成塔,不断提高! 本站所提供的所有信息仅供学校课堂教学及英语学习者学习研究之用，其著作权归原作者及媒体所有。