C D U CXU d T R U d T R U d T R U d T R U d T R U d T R U IDM P P P P D S S S S X U U U U U Main Features of RBS 2206: The RBS 2206 can support the following features: • 1‚ 2 or 3 sectors in one cabinet using CDU-F or CDU-G • Co-siting (antenna sharing) with TDMA or WCDMA systems • Discontinuous transmission/reception • Duplex filters • Dynamic power regulation • Encryption/ciphering • EDGE (hardware prepared) • External alarms • Frequency hopping • Positioning with GPS/LMU • Radio configurations
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the requirement for further development of the radio was an efficient‚ but delicate detector of electromagnetic radiation. Lee De Forest provided such a detector. This detector made a possible to amplify the radio frequency signal picked up by the antenna‚ before applied to the receiver detector; this meant much weaker signals can be utilized which was previously impossible. Then came A.M. and F.M. radio‚ which is used all over the world today. Then came satellite radio‚ satellite radio allows us to
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Characteristics and quality of data transmission – Dependent on characteristics of medium and signal – Guided medium ∗ Medium is more important in setting transmission parameters – Unguided medium ∗ Bandwidth of the signal produced by transmitting antenna is important in setting transmission parameters ∗ Signal directionality · Lower frequency signals are omnidirectional · Higher frequency signals can be focused in a directional beam • Design of data transmission system – Concerned with data rate and
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addition‚ poor read rates are sometimes a problem when the tag is rotated into an orientation that does not align well with the reader. These issues are usually minimized by proper implementation of multiple readers and use of tags with multiple axis antennas. Because RFID is not a line-of-sight technology like barcoding‚ new security issues could develop. For
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Sexual selection: it is part of natural selection. Sexual selection acts on an organism’s ability to obtain or successfully couple with a mate. Selection makes many organisms go to extreme lengths in order to find a mate such as: peacocks need to develop a beautiful tail‚ elephant seals fight over territories…. Sexual selection is often powerful enough to produce features that are harmful to the individual’s survival. For example‚ extravagant and colorful tail feathers or fins are likely to attract
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DESIGN OF E-HEALTH SYSTEMS FOR RURAL AND URBAN AREAS ABSTRACT Telemedicine is the use of information technology to deliver medical services and information from one location to another. The evolution and growth of telemedicine is highly correlated with the developments in communication technology and IT software development. Health services was degraded not only in rural areas‚ but also‚ in the big cities because of the migration of doctors‚ especially‚ specialist doctors. There is a great
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signal is used for two reasons: • To reduce the wavelength for efficient transmission and reception (the optimum antenna size is ½ or ¼ of a wavelength). A typical audio frequency of 3000 Hz will have a wavelength of 100 km and would need an effective antenna length of 25 km! By comparison‚ a typical carrier for FM is 100 MHz‚ with a wavelength of 3 m‚ and could use an antenna only 80 cm long. • To allow simultaneous use of the same channel‚ called multiplexing. Each unique signal can be
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LIST OF FIGURES 2.1 General Block Diagram. 18_ 2.2 Block Diagram Showing Inside View of Controller Section. 20_ 2.3 RFID Module. 23_ 3.1 Entire Circuit Diagram. 24_ 3.2 Controller Section Circuit Diagram.
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object detection system which uses radio waves to determine the range ‚ altitude ‚ direction ‚ or speed of objects. The radar dish or antenna Transmits pulses of radio waves or microwaves which bounces off any object in their path.The object returns a tiny part of the wave’s energy to a dish or antenna which is usually located at the same site as the transmitter. But sound waves have certain distinct advantages over light waves :Sound
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In scientific terms‚ radio is part of the electromagnetic spectrum. Electromagnetic waves push into space going the speed of light‚ which is 300‚000 kilometers per second. When equipment is attached to an antenna‚ the energy becomes radio waves. Some of the energy can be received by another antenna‚ and using a radio receiver‚ the energy connects the transmitter and receiver. Information that is added to the radio waves can be sent as messages known as television programs‚ walkie talkies‚ and other
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