Solution Manual
For Wireless Communications & Networks 2nd Edition
By William Stallings
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(r18a0425) wireless communications and networks
course objectives
1. to provide the students with the fundamental treatment about many practical and theoretical concepts that
forms basic of wireless communication to equip the students with various kinds of wireless networks
and its operations.
2. to prepare the students to understand the concept of frequency reuse and be able to apply it in the
design of mobile cellular system
3. to prepare the students to understand va rious modulation schemes and multiple access techniques that
are used in wireless communications
4. to provide an analytical perspective on the design and analysis the traditional and emerging wireless
networks and to discuss the nature of and solution methods to the fundamental problems in the
wireless networking
5. to train the students to understand the architecture and operation of va rious wireless wan such as gsm,
is-95, gprs and sms
6. to train students to understand wireless lan architectures and operations
7. to prepare students to understand the emerging technique ofdm and its importance in the wireless
communications
unit -i
introduction to wireless communication systems: evolution of mobile radio communications, exa mples of wireless
communication systems-paging systems, cordless telephone systems, cellular telephone systems, comparison of
common wireless communication systems, trends in cellular radio and personal communications. modern wireless
communication systems: second generat ion (2g) cellular netwo rks, third generation (3g) wireless networks, w
ireless local loop (w ll) and lmds, wireless local area networks (wlans), bluetooth and personal area networks
(pans).
unit –ii:
mobile radio propagation: large-scale path loss: introduction to radio wave propagation, free space propagation
model, relating power to electric field, the three basic propagation mechanisms, reflection-reflection from dielectrics,
brewster angle, reflection from prefect conductors, ground reflection (two - ray) model, diffraction-fresnel zone
geo metry, knife- edge diffraction model, multiple knife -edge diffraction, scattering, outdoor propagation models -
longley ryce model, okumura model, hata model, pcs extension to hata model, walfisch and bertoni model, wideband
pcs microcell model, indoor propagation models- partition losses (same floor), partition losses between floors,
log-distance path loss model, ericsson multiple breakpoint model, attenuation factor model, signal penetration
into buildings, ray tracing and site specific modeling.
unit –iii:
mobile radio propagation: small –scale fading and multipath small scale multipath propagation -factors influencing
small scale fading, doppler shift, impulse response model of a multipath channel-relationship between bandwidth
and received power, small-scale multipath measurements-direct rf pulse system, spread spectrum sliding
correlator channel sounding, frequency domain channels sounding, parameters of mobile multipath
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b.tech – (ece) r - 18
channels-time dispersion parameters, coherence bandwidth, doppler spread and coherence time, types of small-scale
fading-fading effects due to multipath time delay spread, flat fading, frequency selective fading, fading effects
due to doppler spread-fast fading, slow fading, statistical models for multipath fading channels-clarke‗s model
for flat fading, spectral shape due to doppler spread in clarke‗s model, simulation of clarke and gans fading model,
level crossing and fading statistics, two-ray rayleigh fading model.
unit –iv
wi-fi and the ieee 802.11 wireless lan standard: ieee 802 architecture, ieee 802.11
architecture and services, 802.11medium access control, 802.11 physical layer, other ieee
802.11 standards, wi-fi protected access. bluetooth and ieee 802.15: overview, radio specification, baseband
specification, link manager specification, logical link control and adaptation protocol, ieee 802.15.
unit -v
mobile data networks: introduction, data oriented cdpd network, gprs and higher data rates, short messaging
service in gs m, mobile application protocols. wireless atm & hiperlan: introduction, wireless atm, hiperlan,
hiperlan-2.
text books:
1. theodore s. rappaport (2002), wireless communications -principles practice,2nd edition, prentice hall of india,
new delhi.
2. william stallings (2009), wireless communications and networks,2nd edition, pearson education, india.
3. kaveh pahlaven, prashanth krishna murthy (2007), principles of wireless networks -a unified
approach, pearson education, india.
reference books:
1. dr. kamilo feher (2003), wireless digital communications, prentice hall of india, newdelhi.
2. jochen schiller (2009), mobile communications, 2 nd edition, pearson education, india.3.andreas f.
molisch (2006), wireless communications, wiley –india, new delhi. course outcomes
upon completion of the course the student will be able to:
1. understand the principles of wireless communications
2. understand fundamentals of wireless networking
3. understand cellular system design concepts
4. analyze various multiple access schemes using wireless communication
5. understand wireless wans and their performance analysis
6. demonstrate wireless lan and their specifications
7. familiar with some of the existing and emerging wireless standards
8. understand the concept of ofdm
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unit - 1
introduction to wireless communication systems
the ability to communicate with people on the move has evolved remarkably since gug lielmo marconi first demonstrated
radio‘s ability to provide continuous contact with ships sailing the english channel in 1897. since then new w ireless
communications methods and services have been enthusiastically adopted by people throughout the world. particularly
during the past ten years, the mobile radio communications industry has grown by orders of magnitude, fueled by
digital and rf circuit fabrication improvements, new large -scale circuit integration, and other miniaturization
technologies which make portable radio equipment smaller , cheaper, and more reliable. digital switching techniques
have facilitated the large scale deployment of affordable, easy-to-use radio communication networks.
evolution of mobile radio communications
the ability to provide wireless communications to an entire population was not even conceived until bell laboratories
developed the cellular concept in the 1960s and 1970s. with the development of highly reliable, miniature, solid-state
radio frequency hardware in the 1970s, the wireless communications era was born.
the following market penetration data show how wireless communications in the consumer sector has grown in
popularity. figure 1.1 illustrates how mobile telephony has penetrated our daily lives compared with other popular
inventions of the 20th century. figure 1.1 shows that the first 35 years of mobile telephony saw little market
penetration due to high cost and the technological challenges involved, but however, in the past decade, wireless
communications has been accepted by cons umers at rates comparable to television and the video cassette recorder.
figure 1.1. the growth of mobile telephony as compared with other popular inventions of the 20th century.
• by 1934, 194 municipal police radio systems and 58 state police stations had adopted amplitude
modulation (am) mobile communication systems for public safety in the u.s.
• in 1935, edwin armstrong demonstrated frequency modulation (fm) for the first time, and since the late
1930s, fm has been the primary modulation technique used for mobile communication systems throughout the
world.
• with the boom in cb radio and cordless appliances such as garage door openers and telephones, the
number of users of mobile and portable radio in 1995 was about 100 million, or 37% of the
u.s. population
• the number of worldwide cellular telephone users grew from 25,000 in 1984 to about 25 million in 1993,
and since then subscription-based wireless services have been experiencing customer growth rates well in
excess of 50% per year. at the beginning of the 21st century, over 1% of the worldwide w ireless
subscriber population had already abandoned wired telephone service for home use, and had begun to rely
solely on their cellular service provider for telephone access.
mobile radiotelephony in the u.s.
in 1946, the first public mobile telephone service was introduced in twenty -five major american cities. each system
used a single, high-powered transmitter and large tower in order to cover distances of over 50 km in a particular
market. during the 1950s and 1960s, at&t bell laboratories and other telecommunications companies throughout the
world developed the theory and techniques of cellular radiotelephony —the concept of breaking a coverage zone
(market) into small cells, each of which reuse portions of the spectrum to increase spectrum usage at the expense of
greater system infrastructure. at&t proposed the concept of a cellular mobile system to the fcc in 1968, although
technology was not available to implement cellular telephony until the late 1970s. in 1983, the fcc finally allocated
666 duplex channels (40 m h z of spectrum in the 800 m hz band, each channel having a one-way bandwidth of 30 khz
for a total spectrum occupancy of 60 khz for each duplex channel) for the u.s. advanced mobile phone system
(amps).