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Abstract—In the future communication applications, users
may obtain their messages that have different importance levels
distributively from several available sources, such as distributed
storage or even devices belonging to other users. This
scenario is the best modeled by the multilevel diversity coding
systems (MDCS). To achieve perfect (information-theoretic)
secrecy against wiretap channels, this paper investigates the
fundamental limits on the secure rate region of the asymmetric
MDCS (AMDCS), which include the symmetric case as a special
case. Threshold perfect secrecy is added to the AMDCS model.
The eavesdropper may have access to any one but not more than
one subset of the channels but know nothing about the sources,
as long as the size of the subset is not above the security level.
The question of whether superposition (source separation) coding
is optimal for such an AMDCS with threshold perfect secrecy
is answered. A class of secure AMDCS (S-AMDCS) with an
arbitrary number of encoders is solved, and it is shown that linear
codes are optimal for this class of instances. However, in contrast
with the secure symmetric MDCS, superposition is shown to
be not optimal for S-AMDCS in general. In addition, necessary
Conditions on the existence of a secrecy key are determined as a
design guideline.
標簽：
Fundamental
Limits
Secure
Class
on
of
上傳時間：
2020-01-04
上傳用戶：kddlas
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PRODUCT DESCRIPTION
The AD810 is a composite and HDTV compatible, current
feedback, video operational amplifier, ideal for use in systems
such as multimedia, digital tape recorders and video cameras.
The 0.1 dB flatness specification at bandwidth of 30 MHz
(G = +2) and the differential gain and phase of 0.02% and
0.04° (NTSC) make the AD810 ideal for any broadcast quality
video system. All these specifications are under load Conditions
of 150 ? (one 75 ? back terminated cable).
The AD810 is ideal for power sensitive applications such as
video cameras, offering a low power supply current of 8.0 mA
max. The disable feature reduces the power supply current to
only 2.1 mA, while the amplifier is not in use, to conserve
power. Furthermore the AD810 is specified over a power supply
range of ±5 V to ±15 V.
標簽：
810
AD
上傳時間：
2020-04-19
上傳用戶：su1254
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Recently millimeter-wave bands have been postu-
lated as a means to accommodate the foreseen extreme bandwidth
demands in vehicular communications, which result from the
dissemination of sensory data to nearby vehicles for enhanced
environmental awareness and improved safety level. However, the
literature is particularly scarce in regards to principled resource
allocation schemes that deal with the challenging radio Conditions
posed by the high mobility of vehicular scenarios
標簽：
Communications
Millimeter
Wave
V2V
上傳時間：
2020-05-23
上傳用戶：shancjb
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This work titled A Digital Phase Locked Loop based Signal and Symbol Recovery
System for Wireless Channel is intended to serve as a document covering funda-
mental concepts and application details related to the design of digital phase locked
loop (DPLL) and its importance in wireless communication. It documents some
of the work done during the last few years covering rudimentary design issues,
complex implementations, and fixing configuration for a range of wireless propa-
gation Conditions.
標簽：
Digital
Locked
Phase
Loop
上傳時間：
2020-05-27
上傳用戶：shancjb
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This book is intended to help electric power and telephone company
personnel and individuals interested in properly protecting critical tele-
communications circuits and equipment located in high voltage (HV)
environments and to improve service reliability while maintaining safe
working Conditions. Critical telecommunications circuits are often
located in HV environments such as electric utility power plants,
substations, cell sites on power towers, and standalone telecommuni-
cations facilities such as 911 call centers and mountaintop telecom-
munications sites.
標簽：
Protection
Voltage
High
上傳時間：
2020-05-27
上傳用戶：shancjb
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This is a practical book, to be sure, but it is also a book about hope and posi-
tive change. I am quite sincere. The delivery of electricity is deeply rooted
in the principle of universal access; when clean, reliable energy is available it
contributes to poverty alleviation, improved social Conditions, and enhanced
economic development. In the developed world, we know this to be true. The
digital fabric of our lives is a testimony to the importance of energy security.
Across the globe, we have seen the vital contributions that electrification has
brought to the development of economies and an enhanced quality of life.
Nonetheless, this supreme engineering achievement has languished, and we are
deeply challenged.
標簽：
Strategies
Analytics
Data
Big
上傳時間：
2020-06-07
上傳用戶：shancjb
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n present power system, the engineers face variety of challenges in
planning, construction and operation. In some of the problems, the engineers need
to use managerial talents. In system design or upgrading the entire system into
automatic control instead of slow response of human operator, the engineers need
to exercise more technical knowledge and experience. It is principally the engi-
neer’s ability to achieve the success in all respect and provide the reliable and
uninterrupted service to the customers. This chapter covers some important areas
of the traditional power system that helps engineers to overcome the challenges. It
emphasizes the characteristics of the various components of a power system such
as generation, transmission, distribution, protection and SCADA system. During
normal operating Conditions and disturbances, the acquired knowledge will pro-
vide the engineers the ability to analyse the performance of the complex system
and execute future improvement
標簽：
Smart
Grids
上傳時間：
2020-06-07
上傳用戶：shancjb
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Modern power systems involve large amount of investment. An electric power
system comprises of generation, transmission, and distribution of electric energy.
Growth of power systems has led to very complex networks extended across large
areas. In such situations, the proper functioning of a modern power system is
heavily dependent upon the healthy operation of the transmission lines within it.
Transmission lines are used to transmit a huge amount of power over a long
distance. But as these lines are located in the open atmosphere, they are highly
affected by different types of abnormal Conditions or faults.
標簽：
Transmission
Protection
Line
上傳時間：
2020-06-07
上傳用戶：shancjb
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Road vehicles — Environmental Conditions and testing for electrical and electronic equipment — Part 5：Chemical loads（EN）ISO16750-5 道路車輛-電氣和電子設備的環境條件和測試 第5部分：化學負荷
標簽：
iso16750
道路車輛
化學負載
上傳時間：
2021-10-31
上傳用戶：
-
電子書-RTL Design Style Guide for Verilog HDL540頁A FF having a fixed input value is generated from the description in the upper portion of
Example 2-21. In this case, ’0’ is output when the reset signal is asynchronously input,
and ’1’ is output when the START signal rises. Therefore, the FF data input is fixed at
the power supply, since the typical value ’1’ is output following the rise of the START
signal.
When FF input values are fixed, the fixed inputs become untestable and the fault detection rate drops. When implementing a scan design and converting to a scan FF, the scan
may not be executed properl not be executed properly, so such descriptions , so such descriptions are not are not recommended. recommended.[1] As in the lower
part of Example 2-21, be sure to construct a synchronous type of circuit and ensure that
the clock signal is input to the clock pin of the FF.
Other than the sample shown in Example 2-21, there are situations where for certain
control signals, those that had been switched due to the Conditions of an external input
will no longer need to be switched, leaving only a FF. If logic exists in a lower level and a
fixed value is input from an upper level, the input value of the FF may also end up being
fixed as the result of optimization with logic synthesis tools. In a situation like this, while
perhaps difficult to completely eliminate, the problem should be avoided as much as possible.
標簽：
RTL
verilog hdl
上傳時間：
2022-03-21
上傳用戶：canderile
