2Wired, Wireless, and Optical Systems

2.1 Chapter Objectives

On completion of this chapter, the reader should:

  1. Be conversant with the basic principles of telecommunicationtransmission systems, which employ wired cabling, wireless or radio signals, and fiber‐optic light transmission, and be able to explain the salient points of each approach.
  2. Understand the importance of frequency and bandwidth in relation to a telecommunication system.
  3. Be conversant with various digital line codes used for synchronization, and be able to explain their purpose.
  4. Be able to explain the nature of a transmission line and how standing waves are produced.
  5. Understand the general principles of radio propagation, and be able to explain the method by which antennas transmit or receive a signal.
  6. Be able to explain the principles of optical communications, including light generation, propagation through optical fiber, reception, andsynchronization.
  7. Be able to apply knowledge of wireless and light propagation to transmission system loss calculations.

2.2 Introduction

As was discussed in Chapter 1, a waveform is a signal that takes on a certain amplitude, and that amplitude changes over time. The physical signal may be a voltage, light, or electromagnetic (EM) wave. This chapter deals with the physical aspects of transmission – either electrical voltages on atransmission line, radio waves propagating through air or space, and optical wavespropagating within an optical fiber. There is some overlap in ...

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