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Mobile wireless COMMUNICATIONs are in constant evolution due to the continu-
ously increasing requirements and expectations of both users and operators.
Mass multimedia* services have been for a long time expected to generate a large
amount of data traffic in future wireless networks [1]. Mass multimedia services
are, by definition, purposed for many people. In general, it can be distinguished
between the distribution of any popular content over a wide area and the distribu-
tion of location-dependent information in highly populated areas. Representative
examples include the delivery of live video streaming content (like sports compe-
titions, concerts, or news) and file download (multimedia clips, digital newspa-
pers, or software updates).
標(biāo)簽：
Broadcasting
Generation
Mobile
Next
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Since the advent of optical COMMUNICATIONs, a great technological effort has
been devoted to the exploitation of the huge bandwidth of optical fibers. Start-
ing from a few Mb/s single channel systems, a fast and constant technological
development has led to the actual 10 Gb/s per channel dense wavelength di-
vision multiplexing (DWDM) systems, with dozens of channels on a single
fiber. Transmitters and receivers are now ready for 40 Gb/s, whereas hundreds
of channels can be simultaneously amplified by optical amplifiers.
標(biāo)簽：
Communication
Techniques
Optical
Theory
and
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Ever since ancient times, people continuously have devised new techniques and
technologies for communicating their ideas, needs, and desires to others. Thus,
many forms of increasingly complex communication systems have appeared
over the years. The basic motivations behind each new one were to improve the
transmission fidelity so that fewer errors occur in the received message, to
increase the transmission capacity of a communication link so that more infor-
mation could be sent, or to increase the transmission distance between relay sta-
tions so that messages can be sent farther without the need to restore the signal
fidelity periodically along its path.
標(biāo)簽：
COMMUNICATIONs
Essentials
Optical
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Orthogonal frequency division multiplexing (OFDM) has been shown to be
an effective technique to combat multipath fading in wireless channels. It
has been and is going to be used in various wireless communication systems.
This book gives a comprehensive introduction on the theory and practice of
OFDM for wireless COMMUNICATIONs.
標(biāo)簽：
Multiplexing
Orthogonal
Frequency
Division
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Performance analysis belongs to the domain of applied mathematics. The
major domain of application in this book concerns teleCOMMUNICATIONs sys-
tems and networks. We will mainly use stochastic analysis and probability
theory to address problems in the performance evaluation of telecommuni-
cations systems and networks. The first chapter will provide a motivation
and a statement of several problems.
標(biāo)簽：
COMMUNICATIONs
Performance
Analysis
Networks
of
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This book is intended for the graduate or advanced undergraduate
engineer. The primary motivation for developing the text was to present a
complete tutorial of phase-locked loops with a consistent notation. I believe
this is critical for the practicing engineer who uses the text as a self-study
guide.
標(biāo)簽：
COMMUNICATIONs
Phase-Locked
Wireless
Loops
for
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The ever-increasing demand for private and sensitive data transmission over wireless net-
works has made security a crucial concern in the current and future large-scale, dynamic,
and heterogeneous wireless communication systems. To address this challenge, computer
scientists and engineers have tried hard to continuously come up with improved crypto-
graphic algorithms. But typically we do not need to wait too long to find an efficient way
to crack these algorithms. With the rapid progress of computational devices, the current
cryptographic methods are already becoming more unreliable. In recent years, wireless re-
searchers have sought a new security paradigm termed physical layer security. Unlike the
traditional cryptographic approach which ignores the effect of the wireless medium, physi-
cal layer security exploits the important characteristics of wireless channel, such as fading,
interference, and noise, for improving the communication security against eavesdropping
attacks. This new security paradigm is expected to complement and significantly increase
the overall communication security of future wireless networks.
標(biāo)簽：
COMMUNICATIONs
Physical
Security
Wireless
Layer
in
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Wireless COMMUNICATIONs is rapidly becoming one of the ubiquitous technological
underpinnings of modern society (such as electric power, fossil fuels, automobiles,
etc.).Fewpeoplethinkaboutthetechnologywithintheirmobilephones,remotecontrols,
garage door openers, GPS navigation devices, and so on. They are always at hand and
reliably work for the user.
標(biāo)簽：
Practical
wireless
digital
signals
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Without doubt, the age of information COMMUNICATIONs is upon 11s. The rapid
pace of technological advancement in digital data COMMUNICATIONs can be wit-
nessed in a multitude of applications in our day-to-day existence. In recent
years, the widespread proliferation of wireless digital cornmunications hass been
readily accepted by the general population worldwide; this is nearly unpa~rallcled
in few other human scientific achievements in terms of scope and speed of devel-
opment.
標(biāo)簽：
Practical
Wireless
Design
Modem
Data
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The investigation of the propagation channel is becoming more and more important in mod-
ern wireless communication. The demand for spectral efficiency motivates exploitation of
all channels that can possibly be used for COMMUNICATIONs. Nowadays, a common trend for
designing physical layer algorithms is to adapt the transceiving strategy, either by maximizing
the diversity gains or by utilizing the coherence of the channels to improve the signal-to-noise
power ratio.
標(biāo)簽：
Characterization
Propagation
Channel
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