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With the advent of IMT-2000, CDMA has emerged at the focal point of
interest in wireless communications. Now it has become impossible to discuss
wireless communications without knowing the CDMA technologies. There are
a number of books readily published on the CDMA technologies, but they are
mostly dealing with the traditional spread-spectrum technologies and the IS-95
based CDMA systems. As a large number of novel and interesting technologies
have been newly developed throughout the IMT-2000 standardization process
in very recent years, new reference books are now demanding that address the
diverse spectrum of the new CDMA technologies.
標(biāo)簽：
Communications
Scrambling
Techniques
CDMA
for
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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Part I provides a compact survey on classical stochastic geometry models. The basic models defined
in this part will be used and extended throughout the whole monograph, and in particular to SINR based
models. Note however that these classical stochastic models can be used in a variety of contexts which
go far beyond the modeling of wireless networks. Chapter 1 reviews the definition and basic properties of
Poisson point processes in Euclidean space. We review key operations on Poisson point processes (thinning,
superposition, displacement) as well as key formulas like Campbell’s formula. Chapter 2 is focused on
properties of the spatial shot-noise process: its continuity properties, its Laplace transform, its moments
etc. Both additive and max shot-noise processes are studied. Chapter 3 bears on coverage processes,
and in particular on the Boolean model. Its basic coverage characteristics are reviewed. We also give a
brief account of its percolation properties. Chapter 4 studies random tessellations; the main focus is on
Poisson–Voronoi tessellations and cells. We also discuss various random objects associated with bivariate
point processes such as the set of points of the first point process that fall in a Voronoi cell w.r.t. the second
point process.
標(biāo)簽：
Stochastic
Geometry
Networks
Wireless
Volume
and
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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A wireless communication network can be viewed as a collection of nodes, located in some domain, which
can in turn be transmitters or receivers (depending on the network considered, nodes may be mobile users,
base stations in a cellular network, access points of a WiFi mesh etc.). At a given time, several nodes
transmit simultaneously, each toward its own receiver. Each transmitter–receiver pair requires its own
wireless link. The signal received from the link transmitter may be jammed by the signals received from
the other transmitters. Even in the simplest model where the signal power radiated from a point decays in
an isotropic way with Euclidean distance, the geometry of the locations of the nodes plays a key role since
it determines the signal to interference and noise ratio (SINR) at each receiver and hence the possibility of
establishing simultaneously this collection of links at a given bit rate. The interference seen by a receiver is
the sum of the signal powers received from all transmitters, except its own transmitter.
標(biāo)簽：
Stochastic
Geometry
Networks
Wireless
Volume
and
II
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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An acronym for Multiple-In, Multiple-Out, MIMO communication sends the same data as several signals
simultaneously through multiple antennas, while still utilizing a single radio channel. This is a form of
antenna diversity, which uses multiple antennas to improve signal quality and strength of an RF link. The
data is split into multiple data streams at the transmission point and recombined on the receive side by
another MIMO radio configured with the same number of antennas. The receiver is designed to take
into account the slight time difference between receptions of each signal, any additional noise or
interference, and even lost signals.
標(biāo)簽：
Understanding_the_Basics_of_MIMO
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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Telecommunications is today widely understood to mean the electrical means of
communicating over a distance. The first form of telecommunications was that of
the Telegraph, which was invented quite independently in 1837 by two scientists,
Wheatstone and Morse. Telegraphy was on a point-to-point unidirectional basis and
relied on trained operators to interpret between the spoken or written word and the
special signals sent over the telegraph wire. However, the use of telegraphy did
greatly enhance the operations of railways and, of course, the dissemination of news
and personal messages between towns.
標(biāo)簽：
Telecommunications
Understanding
Networks
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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A wireless ad-hoc network is a wireless network deployed without any infrastructure. In
such a network, there is no access point or wireless router to forward messages among the
computing devices. Instead, these devices depend on the ad-hoc mode of their wireless net‐
work interface cards to communicate with each other. If the nodes are within the transmis‐
sion range of the wireless signal, they can send messages to each other directly. Otherwise,
the nodes in between will forward the messages for them. Thus, each node is both an end
system and a router simultaneously.
標(biāo)簽：
WIRELESS
NETWORKS
AD-HOC
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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The large-scale deployment of the smart grid (SG) paradigm could play a strategic role in
supporting the evolution of conventional electrical grids toward active, flexible and self-
healing web energy networks composed of distributed and cooperative energy resources.
From a conceptual point of view, the SG is the convergence of information and
operational technologies applied to the electric grid, providing sustainable options to
customers and improved security. Advances in research on SGs could increase the
efficiency of modern electrical power systems by: (i) supporting the massive penetration
of small-scale distributed and dispersed generators; (ii) facilitating the integration of
pervasive synchronized metering systems; (iii) improving the interaction and cooperation
between the network components; and (iv) allowing the wider deployment of self-healing
and proactive control/protection paradigms.
標(biāo)簽：
Computational
Intelligence
上傳時(shí)間：
2020-06-07
上傳用戶：shancjb
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GaN is an already well implanted semiconductor
technology, widely diffused in the LED optoelectronics
industry. For about 10 years, GaN devices have also been
developed for RF wireless applications where they can
replace Silicon transistors in some selected systems. That
incursion in the RF field has open the door to the power
switching capability in the lower frequency range and
thus to the power electronic applications.
Compared to Silicon, GaN exhibits largely better figures
for most of the key specifications: Electric field, energy
gap, electron mobility and melting point. Intrinsically,
GaN could offer better performance than Silicon in
terms of: breakdown voltage, switching frequency and
Overall systems efficiency.
標(biāo)簽：
GaN-on-Si
Displace
and
SiC
Si
上傳時(shí)間：
2020-06-07
上傳用戶：shancjb
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RFID is at a critical price point that could enable its large-scale adoption.
What strengths are pushing it forward? What technical challenges and
privacy concerns must we still address?
標(biāo)簽：
an-introduction-to-rfid-technolog
上傳時(shí)間：
2020-06-08
上傳用戶：shancjb
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There’s a story (it’s either an old vaudeville joke
or a Zen koan) in which a fisherman asks a fish,
“What’s the water like down there?” and the
fish replies “What is water?” If the story is just
a joke, the point is to make us laugh; but if it’s
a koan, the point is that the most obvious and
ubiquitous parts of our immediate environ-
ment are, paradoxically, often the easiest to
overlook.
標(biāo)簽：
Atmospheric
Monitoring
Arduino
With
上傳時(shí)間：
2020-06-09
上傳用戶：shancjb
