Wireless Communication Technology(书籍发布组发布): Wireless Communication Technology.part2.rar

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Wireless Communication Technology(书籍发布组发布):

Wireless Communication Technology.pdf
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[ 本帖最后由 bandwidth 于 2008-12-25 20:03 编辑 ]

1.Fundamental Concepts
Objectives
After studying this chapter, you should be able to:
( Explain the nature and importance of wireless communication.
( Outline the history of wireless communication.
( Explain the necessity for modulation in a radio communication system.
( Outline the roles of the transmitter, receiver, and channel in a radio
communication system.
( Describe and explain the differences among simplex, half-duplex, and
full-duplex communication systems.
( Describe the need for wireless networks and explain the use of repeaters.
( List and briefly describe the major types of modulation.
( State the relationship between bandwidth and information rate for any
communication system.
( Calculate thermal noise power in a given bandwidth at a given
temperature.
( Explain the concept of signal-to-noise ratio and its importance to
communication systems.
( Describe the radio-frequency spectrum and convert between frequency and
wavelength.
2.Analog Modulation
Schemes
Objectives
After studying this chapter, you should be able to:
( Explain the concept of modulation.
( Describe the differences among analog modulation schemes.
( Analyze amplitude-modulated signals in the time and frequency domains.
( Analyze frequency-modulated signals in the frequency domain.
( Describe phase modulation.
( Explain the need for pre-emphasis and de-emphasis with FMsignals.
3.Digital Communication
Objectives
After studying this chapter, you should be able to:
( Compare analog and digital communication techniques and discuss the
advantages of each.
( Calculate the minimum sampling rate for a signal and explain the necessity
for sampling at that rate or above.
( Find the spurious frequencies produced by aliasing when the sample rate is
too low.
( Describe the common types of analog pulse modulation.
( Describe pulse-code modulation and calculate the number of quantizing
levels, the bit rate, and the dynamic range for PCM systems.
( Explain companding, show how it is accomplished, and explain its effects.
( Describe the coding and decoding of a PCM signal.
( Describe differential PCM and explain its operation and advantages.
( Describe delta modulation and explain the advantages of adaptive delta
modulation.
( Distinguish between lossless and lossy compression and provide examples
of each.
( Describe the operation of common types of vocoders.
4.Digital Modulation
Objectives
After studying this chapter, you should be able to:
( Describe the basic types of digital modulation.
( Calculate the maximum data rate for a channel with a given modulation
scheme and signal-to-noise ratio.
( Explain the use of eye diagrams and constellation diagrams.
( Explain the difference between bit rate and baud rate and calculate both
for typical digital modulation systems.
( Describe and compare FSK, PSK, and QAM and perform simple calculations
with each.
( Explain the concepts of multiplexing and multiple access using frequency
and time division.
( Describe the principles of spread-spectrum communication and distinguish
between frequency-hopping and direct-sequence systems.
( Calculate spreading gain and signal-to-noise ratio for spread-spectrum
systems.
( Describe code-division multiple access and compare with FDMA and TDMA.
5.Basic Telephony
Objectives
After studying this chapter, you should be able to:
( Describe the topology of the switched telephone network.
( Describe the various signals present on a local-loop telephone line and
explain the function of each.
( Describe and compare in-band and out-of-band signaling systems for
telephony.
( Explain the advantages of common-channel signaling.
( Describe Signaling System Seven and explain its use in keeping track
of calls.
( Explain the use of time-division multiplexing in telephony and perform bit
rate calculations with TDM signals.
6.Transmission Lines
and Waveguides
Objectives
After studying this chapter, you should be able to:
( Give several examples of transmission lines and explain what parameters of
a transmission line must be considered as the frequency increases.
( Define characteristic impedance and calculate the impedance of a coaxial
or open-wire transmission line.
( Define reflection coefficient and standing-wave ratio and calculate them in
practical situations.
( Calculate losses on transmission lines.
( Name the dominant mode in a rectangular waveguide and describe its
characteristics.
( Calculate the cutoff frequency, phase and group velocity, guide
wavelength, and characteristic impedance, for the TE10 mode in a
rectangular waveguide.
( Describe several methods for coupling power into and out of waveguides.
( Explain the operation of passive microwave components, including
waveguide bends and tees, resonant cavities, attenuators, and loads.
( Describe the operation and use of circulators and isolators.
( Explain the importance of impedance matching with respect to
transmission lines.
7.Radio Propagation
Objectives
After studying this chapter, you should be able to:
( Describe the propagation of radio waves in free space and over land.
( Calculate power density and electric and magnetic field intensity for waves
propagating in free space.
( Calculate free-space attenuation and path loss.
( Perform the necessary calculations to determine the maximum
communication range for line-of-sight propagation.
( Calculate path loss in a mobile environment, and explain how such an
environment differs from free space.
( Explain rapid fading and calculate the fade period for a moving vehicle.
( Describe the use of repeaters to increase communication range.
( Explain the cellular concept and calculate the signal-to-interference ratio for
cellular systems.
( Describe how cell-splitting can increase the capacity of a system.
( Describe means to reduce the effects of fading in mobile systems.
( Distinguish between geostationary satellites and those in lower orbits, and
explain the advantages and disadvantages of each.
8.Antennas
Objectives
After studying this chapter, you should be able to:
( Explain the basic principles of operation of antenna systems.
( Define radiation resistance and use it to calculate the efficiency of an
antenna.
( Define antenna gain, beamwidth, and front-to-back ratio, and determine
them from a plot of an antenna’s radiation pattern.
( Convert between antenna gains given in dBi and dBd, and use either to
calculate effective isotropic radiated power (EIRP) and effective radiated
power (ERP) for an antenna-transmitter combination.
( Calculate the dimensions of simple practical antennas for a given frequency.
( Identify, explain the operation of, and sketch the approximate radiation
patterns for common types of antennas and antenna arrays.
( Calculate the gain and beamwidth for selected antenna types.
( Explain the use of diversity and downtilt in cellular base station antennas.
9.Transmitter and
Receiver Circuitry
Objectives
After studying this chapter, you should be able to:
( Discuss the requirements and specifications for transmitters and determine
whether a given transmitter is suitable for a particular application.
( Draw block diagrams for several types of transmitters and explain their operation.
( Analyze the operation of transmitter circuits.
( Explain the basic operation of frequency synthesizers and mixers.
( Describe the characteristics of Class A, B, and C amplifiers and decide which
type is the most suitable for a given application.
( Describe the ways in which FM transmitters and receivers differ from those
for AM and explain why they differ.
( Analyze the operation of analog and digital modulators.
( Describe the basic superheterodyne system, and explain why it is the
preferred design for most receivers.
( Explain the requirements for each stage in a receiver.
( Analyze the operation of demodulators for analog and digital signals.
( Analyze specifications for receivers and use them to determine suitability for
a given application.
( Explain how transceivers differ from separate transmitters and receivers.
10.Cellular Radio
Objectives
After studying this chapter, you should be able to:
( Describe the history of personal communication up to the beginning of
digital cellular radio.
( Explain the operation and limitations of CB radio and cordless telephones.
( Explain the operation of and perform relevant calculations for North
American analog cellular telephone systems.
( Explain the operation of and perform relevant calculations for North
American digital cellular telephone systems.
11.Personal Communication
Systems
Objectives
After studying this chapter, you should be able to:
( Compare cellular radio with PCS.
( Describe the operation of each of the personal communication systems
used in North America.
( Compare the North American personal communication systems.
( Perform calculations of spectral efficiency for PCS.
( Calculate open-loop power and processing gain for CDMA PCS.
( Explain and compare the methods in which data can be carried on PCS.
12.Satellite-Based
Wireless Systems
Objectives
After studying this chapter, you should be able to:
( Calculate velocity and period for artificial satellites in circular orbits.
( Distinguish between low-, medium-, and geostationary earth orbits, and
explain the advantages and disadvantages of each for communication.
( Explain how elliptical orbits can be used in communication satellites.
( Explain the need for satellite tracking, and describe how it is done.
( Describe the types of satellite transponders used for wireless
communication.
( Perform signal, noise, and signal-to-noise ratio calculations with satellite
links.
( Describe several current and projected projects in the field of wireless
communication by satellite, and discuss the merits of each.
13.Paging and Wireless
Data Networking
Objectives
After studying this chapter, you should be able to:
( Describe and explain the operation of several systems used for one- and
two-way paging.
( Compare paging systems with respect to capabilities and complexity.
( Describe the operation of voice paging systems.
( Describe the operation of wired Ethernet LANs.
( Explain the need for wireless LANequipment.
( Discuss the IEEE 802.11 and Bluetooth standards and suggest which would
be preferred for given applications.
( Explain the need for and the operation of wireless Ethernet bridges and
modems.
( Describe the operation of infrared LANs and compare them to wired LANs
and wireless LANs using radio.
( Describe and compare public packet-data networks and compare them with
other kinds of wireless data communication.
14.The Future of Wireless
Objectives
After studying this chapter, you should be able to:
( Describe and compare wireless alternatives to the copper local loop.
( Explain the process by which standards for the third generation of wireless
communication are being developed.
( Compare third-generation wireless proposals.
( Explain the third-generation requirements and compare them with systems
currently available.
( Explain the difference between MMDS and LMDS and discuss their
contribution to the total wireless picture.
( Explain what is meant by convergence and discuss the place of wireless
communication in the future.
( Discuss safety and esthetic factors that could affect the progress of wireless
communication.
( Make some predictions of your own about the future of wireless
communication.

[ 本帖最后由 bandwidth 于 2008-12-25 20:07 编辑 ]

Wireless Communication Technology.pdf

本帖最后由 bandwidth 于 2011-5-20 22:04 编辑