digital data analog signal ppt
DIGITAL DATA TRANSMISSION - I
Ngày tải lên :
19/10/2013, 17:15
...
Digital Signal Source:
The signal sources produce a series of “0”s (about –2.5 V) and “1”s (+2.5 V) at the data rate
set by the Master Clock. The time period of each bit is T = 1/fs. This signal ... detection process. This signal is useful in accurately measuring errors
in detected data due to a communications channel.
Figure 5 A (b) Block parameters digital signal source
Summer:
Page ...
signal source produces equally likely 0’s and 1’s.
Figure 5 A (d) Block parameters limiter
Error Detector:
The processed signal is compared with a sample of the signal source. For each data...
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DIGITAL DATA TRANSMISSION - II
Ngày tải lên :
23/10/2013, 15:15
... output of the digital summer as well as that of the Digital Signal Source was
observed on the oscilloscope. The graphs are as shown.
It is seen that there is no change in the output signal when ... :
A. Actual FSK systems use “continuos phase” signals wherein one signal starts where
the other signal stops. A VCO is used to generate such signals.
Figure 6D (a)FSK using Phase lock ... begins at the start of every data period and proceeds at the
frequency fx until the end of the data period. Then the process repeats.
Figure 6c The FSk Modulated signal
B. Cross –...
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Tài liệu Module 4: Designing a User Data Management Strategy pptx
Ngày tải lên :
10/12/2013, 15:15
... Designing a User Data Management Strategy 3
Determining Current User Data Environment
?
?
?
What Is User Data?
What Is User Data?
?
?
?
Which User Data Is Currently Stored?
Which User Data Is Currently ... a User Data Management Strategy
Determining Current User Data Strategies
Determining Current User Data Environment
Determining Current User Data Management Methods
Data
Users
Users
... User Data Currently Stored?
Where Is User Data Currently Stored?
?
?
?
What Is the Current Use of Offline Data?
What Is the Current Use of Offline Data?
?
?
?
What Is the Current Use of Roaming Data?
What...
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Tài liệu Module 5: Embedding XML Data in HTML pptx
Ngày tải lên :
10/12/2013, 16:16
... nature of a data island.
!
Describe how to use Data Source Objects (DSO) to display XML data
islands in an HTML page.
!
Create an XML data island in an HTML file.
!
Bind XML data to HTML ... 5: Embedding XML Data in HTML
#
##
#
Using Data in Web Browsers
!
Delivering Data from the Web Server
!
Using Client-Side Data Source Objects (DSO)
!
Presentation vs. Data
!
Internet Explorer ... Objects, and DHTML
data binding simplify data access and presentation on the Web.
Slide Objective
To introduce the concept of
data access and data- aware
Web pages.
Lead-in
Data access is now...
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Tài liệu EIA-530 Digital Patching Control Platform pptx
Ngày tải lên :
10/12/2013, 17:15
...
EIA-530 Digital Patching Control Platform
www.adc.com • +1-952-938-8080 • 1-800-366-3891
The PatchMate digital control platform provides a convenient, organized, and secure method of digital
communication ... of ADC's global sales office locations, please refer to our web site.
PatchMate
™
EIA-530 Digital Patching Control Platform
Description
Modules
Patch module with LEDs PMM-614001
– Rear/top ... 9/02 • 528
PatchMate
™
3
PatchMate
™
EIA-530 Digital Patching Control Platform
www.adc.com • +1-952-938-8080 • 1-800-366-3891
EIA-530 Modules...
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Tài liệu CUSTOMER SATISFACTION USING DATA MINING TECHNIQUES ppt
Ngày tải lên :
11/12/2013, 23:15
... BASED DATA MINING TECHNIQUES
The objective of data mining is to extract valuable information from one’s data, to discover the ‘hidden
gold’. In Decision Support Management terminology, data mining ... one search for patterns of information in data (Parsaye, 1997).
Figure 2: Rule Induction process
Data mining techniques are based on data retention and data distillation. Rule induction models ... rule induction data mining.
Furthermore, it is examined whether the implementation of the two methodologies may offer a solution
to the problem of missing data, in the initial data set.
KEYWORDS:...
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Tài liệu THE DIGITAL LOGIC LEVEL-3 ppt
Ngày tải lên :
12/12/2013, 09:15
... cycle
1
2
3
4
5
6
7
T
8
T
9
T
10
T
11
T
12
Error Snoop Resp Data
Req Error Snoop Resp Data
Req Error Snoop Resp Data
Resp
Req Error Snoop Resp Data
Req Error Snoop Data
Req Error Snoop Resp Data
Req Error Snoop Resp Data
Figure 3-45. ... II
CPU
Bus
arbitration
Request
Data
Snoop
Error
Φ
Figure 3-44. Logical pinout of the Pentium II. Names in
upper case are the official Intel names for individual signals.
Names in mixed case are groups of related signals ... gates.
Typical
Micro-
Processor
Symbol for
electrical ground
Symbol
for clock
signal
Bus arbitrationAddressing
Coprocessor
Status
MiscellaneousInterrupts
Bus control
Power is 5volts
+5v
Data
Φ
Figure 3-33. The logical pinout of...
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Tài liệu Microsoft Access 2007 Data Analysis P2 pptx
Ngày tải lên :
13/12/2013, 03:15
... will be stored. All other database objects will refer to the tables in
your database for data, whether asking questions of the data or creating
reports based on the data. This section covers ... limitation.
This is not to say that Access has unlimited data storage capabilities. Every bit
of data causes the Access database to grow in file size. An Access database has
a file size limitation of 2 gigabytes. ... querying data to get fast results, but it’s important to
understand the basics of the relational database concept before pounding
away at data. A good understanding of how a relational database...
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Tài liệu Digital Photography - Phần 1 pptx
Ngày tải lên :
13/12/2013, 23:15
... chemicals.
WHY GO DIGITAL?
Once captured, digital photographs are already in a format that makes
them incredibly easy to distribute and use. For example, you can insert
digital photographs ...
large-screen TV. Digital photography is instant photography without the
film costs!
If you're considering going digital, here are a few more reasons to get
even more serious.
- Going digital ... processed. (Or
wasting unexposed film when you can't wait.)
Digital cameras are becoming more than just cameras. Some digital
cameras are capable of capturing not only still photographs,...
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Tài liệu Digital Photography - Phần 2 pptx
Ngày tải lên :
13/12/2013, 23:15
... link in the chain.
The key element in digital photography is an image in a digital format
made up pixels. Although a digital camera captures photos in this digital
format, you can also scan slides, ... steps of digital photography
Digital cameras are just one link in a long chain leading from the
original scene through to the final image that you display or distribute. In
fact, a digital ... same digital format.
To understand how the camera fits in with other parts of the digital
photography system, it helps to understand the three basic steps involved
in creating and using digital...
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Tài liệu A Concise Introduction to Data Compression- P2 ppt
Ngày tải lên :
14/12/2013, 15:15
... watermark.
2
Huffman Coding
Huffman coding is a popular method for compressing data with variable-length codes.
Given a set of data symbols (an alphabet) and their frequencies of occurrence (or, equiv-
alently, ... the compressed data on a file, the variance of the code
makes no difference. A small-variance Huffman code is preferable only in cases where
the encoder transmits the compressed data, as it is being ... starts with a
special header indicating mode 1, followed by the length LEN of the data, followed by
LEN bytes of literal data. Notice that the maximum value of LEN is 65,535.
2. Compression with fixed...
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Tài liệu A Concise Introduction to Data Compression- P3 pptx
Ngày tải lên :
14/12/2013, 15:15
... which makes it so useful in data compression,
is that it takes correlated input data and concentrates its energy in just the first few
transform coefficients. If the input data consists of correlated ... the
quantized coefficients. This results in data items that are not identical to the original
ones but are not much different.
In practical applications, the data to be compressed is partitioned into ... as 3, 4, or 6 result in many small sets of data items.
Such a small set is transformed to a small set of coefficients where the energy of the
original data is concentrated in a few coefficients, but...
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Tài liệu A Concise Introduction to Data Compression- P4 pptx
Ngày tải lên :
14/12/2013, 15:15
... eye is therefore similar to a digital camera. Once we realize this, we
naturally want to compare the resolution of the eye to that of a modern digital camera.
Current digital cameras have from 500,000 ... for the
entire 64-pixel data unit is the 46-bit number
1111111111100111010001001101101110111010101010.
These 46 bits encode one color component of the 64 pixels of a data unit. Let’s assume
that ... set of basis images
that have higher and higher frequencies. Given a data vector, the DCT separates the
frequencies in the data and represents the vector as a linear combination (or a weighted
sum)...
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Tài liệu A Concise Introduction to Data Compression- P6 pptx
Ngày tải lên :
14/12/2013, 15:15
... used to compress data that has been digitized from an analog source, such
as sampled sound and scanned images (drawings or photographs). Such data is called
digitally sampled analog data (DSAD). ... nine bits. Since the uncoded data requires just two bits (01 or 10),
the compression ratio is 9/2=4.5 (the compressed data is 4.5 times bigger than the
original data; a significant expansion).
Please ... If
the data to be compressed is in the form of large numbers, quantization is used to
convert them to small numbers. This results in (lossy) compression. If the data to
be compressed is analog...
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Tài liệu Statistical Description of Data part 9 pptx
Ngày tải lên :
15/12/2013, 04:15
... the values of the data. That means that we can do
all the fitting in advance, for fictitious data consisting of all zeros except for a single 1, and
then do the fits on the real data just by taking ... noisy data.
The premise of data smoothing is that one is measuring a variable that is both slowly
varying and also corrupted by random noise. Then it can sometimes be useful to replace
each data ... relative
widths and heights of spectral lines in noisy spectrometric data.
Recall that a digital filter is applied to a series of equally spaced data values f
i
≡ f(t
i
),
where t
i
≡ t
0
+ i∆ for some constant...
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