| Along with the development of the wireless and micro-electronics technology,the transmiting technology of the short-distance is developing rapidly and this essay is mainly describe the Bluetooth and the application on the headset , include the hardware design, function realization, manufacture technics and test technique etc. At last briefly describe the application foreground of the Bluetooth.The aim of this essay is to spread the Bluetooth and the bluetooth headset and as a instructor for Amoi Bluetooth project.The essay is founded by theory considered with the practice,which solve the anti-jamming while communicating and the test, the summary desribe of the Bluetooth and the bluetoothe headset as below:The Bluetooth is an open standard of the wireless data and the voice transmitting,which connected all kinds of the communications devices , PC and terminal ,all kinds of the data system even the family wiring with the wireless style. The transmission distance is 10cm~10m,far more than 100m if enhance the power or add other outside device. The Bluetooth adopts the 2.4GHz ISM frequency band and the frequency modulation and Frequency Hopping,and use the FEC, ARQ, TDD and BBP.The time slot of the TDMA is 625μs and the data transmiting speed is IMb/s.The Bluetooth support the online transmiting both the voice and the data and the voice coding adopts CVSD,which emission power is 1m\W 2.5mW and 100mW,additional use the global uniform standard -48bits equipment identifying code. In case of the cable is replaced by the wireless interface and can be replanted easily ,the Bluetooth can be used in all kinds of conditions,with low power , harmless to people and easy use and realization,the Bluetooth will be widely spreaded .The Bluetooth technology is faced to the short distance connection between the moved facilities, so substantially it is the technology for replacing cables.lt can be used to replaced presently cables connect in short distance range and can rid of the bug of the infrared ray which can not go through the hindrance such as wall .which can realize an agility, safety, low cost and low power wastage speaking and data traffic through uniform short distance wireless chain. The Bluetooth headset is the perfect combination product of the Bluetooth technology and the mobile phone. Bluetooth headset is the exactly representation for science and technology is based on the human, set free the hands of the the owners and the distance bondage receiving and phoning will become easy and relaxant.do not worry about the mobile weight and size, phoning while driving can also be far away the danger. The bluetooth will have a very wide application future in such crowded people and mass commerce activities China. |
