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Changes in telecommunications are impacting all types of user
group, which include business users, traveling users, small and
home offices, and residential users. The acceptance rate of telecom-
munications and information services is accelerating significantly.
Voice services needed approximately 50 years to reach a very high
teledensity; television needed just 15 years to change the culture
and lives of many families; the Internet and its related services have
been penetrating and changing business practices and private com-
munications over the last 2 to 3 years.
標簽:
Telecommunications
Handbook
The
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Having dealt with in-depth analysis of SS#7, GSM and GPRS networks I started to monitor
UTRAN interfaces approximately four years ago. Monitoring interfaces means decoding
the data captured on the links and analysing how the different data segments and messages
are related to each other. In general I wanted to trace all messages belonging to a single
call to prove if the network elements and protocol entities involved worked fine or if there
had been failures or if any kind of suspicious events had influenced the normal call
proceeding or the call’s quality of service. Cases showing normal network behaviour have
been documented in Kreher and Ruedebusch (UMTS Signaling. John Wiley & Sons, Ltd,
2005), which provides examples for technical experts investigating call flows and network
procedures.
標簽:
Performance
Measurement
Practical
Guide
UMTS
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In this first part of the book the Vienna Link Level (LL) Simulators are described.
The first chapter provides basics of LL simulations, introduces the most common
variables and parameters as well as the transceiver structures that are applied in
Long-Term Evolution (LTE) and Long-Term Evolution-Advanced (LTEA). We
focus here mostly on the Downlink (DL) of LTE as most results reported in later
chapters are related to DL transmissions.
標簽:
LTE-Advanced
Simulators
Vienna
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This book intends to prepare you to define Unified Communications (UC) for
yourself and then get it to work for you.
Each vendor pulls together from its available products a package of features
related to voice, data, messaging, and image communications. That’s UC for
one vendor, but it’s unlikely to match exactly the UC from another vendor.
You need a detailed specification to know what you’ll see installed.
標簽:
Communications
Unified
VoIP
and
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Electrostatic discharge (ESD) is one of the most prevalent threats to the reliability
of electronic components. It is an event in which a finite amount of charge is trans-
ferred from one object (i.e., human body) to another (i.e., microchip). This process
can result in a very high current passing through the microchip within a very short
period of time, and, hence, more than 35% of chip damages can be attributed to an
ESD-related event. As such, designing on-chip ESD structures to protect integrated
circuits against the ESD stresses is a high priority in the semiconductor industry.
標簽:
Electrostatic
Protection
Discharge
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2020-06-05
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In the seven years since the first edition of this book was completed, Electrostatic
Discharge (ESD) phenomena in integrated circuits (IC) continues to be important
as technologies shrink and the speed and size of the chips increases. The phenom-
ena related to ESD events in semiconductor devices take place outside the realm of
normal device operation. Hence, the physics governing this behavior are not typ-
ically found in general textbooks on semiconductors.
標簽:
Integrated
Circuits
Silicon
ESD
In
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ESD is a crucial factor for integrated circuits and influences their quality and reliability.
Today increasingly sensitive processes with deep sub micron structures are developed. The
integration of more and more functionality on a single chip and saving of chip area is
required. Integrated circuits become more susceptible to ESD/EOS related damages.
However, the requirements on ESD robustness especially for automotive applications are
increasing. ESD failures are very often the reason for redesigns. Much research has been
conducted by semiconductor manufacturers on ESD robust design.
標簽:
Guidelines
Design
Basic
ESD
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In the present era, low observability is one of the critical requirements in aerospace
sector, especially related to defense. The stealth technology essentially relates to
shaping and usage of radar absorbing materials (RAM) or radar absorbing struc-
tures (RAS). The performance of such radar cross section (RCS) reduction tech-
niques is limited by the bandwidth constraints, payload requirements, and other
structural issues. Moreover, with advancement of materials science, the structure
geometry no longer remains key decisive factor toward stealth.
標簽:
Fundamentals
Design
Radar
of
EM
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2020-06-06
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With the rapid development of electric vehicles (EVs) as well as the promotion and
application of vehicle-to-grid (V2G) technologies, EVs charging loads, as flexible
loads, have the potential to participate in the grid services, including peak shaving
and valley filling, frequency regulation (FR), emergency power, energy market
participation, and so on. Therefore, great attention has been paid to EVs and V2G.
Focusing on the interactions between EVs and power system, this book aims to
bring readers with basic knowledge of electrical engineering promptly to the
frontier of the EVs’ influence on power system and environment. This book may
serve as a reference for scientists, electrical engineers, and postgraduate students
majoring in electrical engineering or other related fields.
標簽:
Electric
Vehicles
System
Power
on
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2020-06-07
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A revolution in power industries, including generation, transmission and distribution, driven by
environmental and economic considerations, is taking place all over the world. The smart grid allows for
integration of diverse generation and storage options, reduced losses, improved efficiencies, increased
grid flexibility, reduced power outages, allowing for competitive electricity pricing and integration of
electric vehicles and overall becoming more responsive to market, consumer and societal needs. It is
bringing profound changes to both power systems and many related industries.
標簽:
Measurement
Innovative
Solutions
Testing
and
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2020-06-07
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