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什么叫“蓝牙”(一)

2005-09-07 00:00

  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

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