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Lecture Wireless and mobile computing – Chapter 7: Transmission Fundamentals Review Q/A

Lecture Wireless and mobile computing – Chapter 7: Transmission Fundamentals review Q/A. The following will be discussed in this chapter: Transmission media, guided unguided media, transmission media, microwave transmission, direct broadcast satellite, multiplexing, FDM TDM. | TRANSMISSION FUNDAMENTALS Review Q/A Lecture 7 1 Overview Transmission Media Guided Unguided Media Transmission Media Microwave Transmission Direct Broadcast Satellite Multiplexing FDM TDM 2 Review Question: Guided Vs. Unguided Media Atmosphere and Outer space Review Question: Differentiate between guided media and unguided media 3 Transmission Media The transmission medium is the physical path by which a message travels from sender to receiver. Computers and telecommunication devices use signals to represent data. These signals are transmitted from a device to another in the form of electromagnetic energy. Examples of Electromagnetic energy include power, radio waves, infrared light, visible light, ultraviolet light, and X and gamma rays. All these electromagnetic signals constitute the electromagnetic spectrum Review Question: Guided Vs. Unguided Media 4 Classes of Transmission Media Conducted or guided media use a conductor such as a wire or a fiber optic cable to move the signal from sender to receiver Wireless or unguided media use radio waves of different frequencies and do not need a wire or cable conductor to transmit signals Review Question: Guided Vs. Unguided Media 5 5 Review Answer: With guided media, the electromagnetic waves are guided along an enclosed physical path, whereas unguided media provide a means for transmitting electromagnetic waves through space, air, or water, but do not guide them. Atmosphere and Outer space Review Question: Differentiate between guided media and unguided media Review Question: Guided Vs. Unguided Media 6 7 Review Question: Microwave Transmission Review Question: What are some major advantages and disadvantages of microwave transmission? 8 Microwave Transmission Characteristics Microwave transmission covers a substantial portion of the electromagnetic spectrum. Common frequencies used for transmission are in the range 2 to 40 GHz. The higher the frequency used, the higher the potential bandwidth and therefore the higher | TRANSMISSION FUNDAMENTALS Review Q/A Lecture 7 1 Overview Transmission Media Guided Unguided Media Transmission Media Microwave Transmission Direct Broadcast Satellite Multiplexing FDM TDM 2 Review Question: Guided Vs. Unguided Media Atmosphere and Outer space Review Question: Differentiate between guided media and unguided media 3 Transmission Media The transmission medium is the physical path by which a message travels from sender to receiver. Computers and telecommunication devices use signals to represent data. These signals are transmitted from a device to another in the form of electromagnetic energy. Examples of Electromagnetic energy include power, radio waves, infrared light, visible light, ultraviolet light, and X and gamma rays. All these electromagnetic signals constitute the electromagnetic spectrum Review Question: Guided Vs. Unguided Media 4 Classes of Transmission Media Conducted or guided media use a conductor such as a wire or a fiber optic cable to move the signal .