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什么是“藍(lán)牙”技術(shù)? What is Bluetooth?

時間:2023-05-04 19:16:29 計算機(jī)英語 我要投稿
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什么是“藍(lán)牙”技術(shù)? What is Bluetooth?

什么是“藍(lán)牙”技術(shù)? What is Bluetooth?

 

Bluetooth is a universal radio interface in the 2.45GHz frequency band that enables portable electronic devices to connect and communicate wirelessly via short-range, ad hoc networks. Each unit can simultaneously communicate with up to sever other units per piconet. Moreover, each unit can simultaneously belong to several piconets.

 

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

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