digital data over analog signal
Tài liệu Lecture 22: Digital Transmission of Analog Data (Baseband Transmission): doc
Ngày tải lên :
09/12/2013, 16:15
... to Telecommunications, Winter 2000 Lecture-22 Digital Transmission
Digital Transmission of Analog Data (Baseband Transmission):
• Analog voice data must be translated into a series of binary ... transmission of analog information represents
a basic application of digital communications.
Sampling:
• It is an operation that is basic to digital signal processing and digital communication. ... an analog signal is converted to its digital form.
• To obtain either form of pulse modulation we start with sampling.
Sampling is the process of taking samples (amplitude) of an analog signal...
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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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BUILDING HIGH-SPEED DATA OVER VOICE NETWORKS
Ngày tải lên :
27/10/2013, 00:15
... Services offers comprehensive solutions for network operators delivering
voice, video and data services over wireless, wireline and cable networks. Learn more at
www.adc.com/professionalservices
ADC ... needed to meet its aggressive timetables for the infrastructure
expansion.
BUILDING HIGH-SPEED DATA
OVER VOICE NETWORKS
CASE STUDY
DSLAMs to the carriers ATM backbone or to
subtend off-hub sites. ... to our web site.
CASE STUDY
CHALLENGE
A major U.S. regional carrier needs to create a high-speed data network
using its existing voice infrastructure in more than 300 metropolitan and
rural markets....
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Tài liệu Understanding Voice over IP Signaling Protocols in Cisco Telephony Implementations ppt
Ngày tải lên :
10/12/2013, 14:15
... exponential growth of VoIP, performed signaling in either an analog or digi-
tal formats that still play an important role in voice gatew
ays. While VoIP signaling protocols vary from vendor
to ... implementation has a critical reliance on VoIP
signaling protocols
.
Chris Olsen, Global Knowledge Instructor, CCSI, CCNA, CCNP, CCVP
Understanding Voice over IP Signaling Protocols
in Cisco Telephony ... 1960s as a replacement to the old pulse or
rotary phones to create unique analog sounds used for voice signaling in analog phones
.
As an example of
DTMF relay, let’s say a user on one IP phone...
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Weidmuller micro analog signal conditioner
Ngày tải lên :
14/02/2014, 16:56
... A L O G
Analog Signal Conditioners
M I C R OA N A L O G DC/DC select
M I C R O A N A L O G THERMO select
M I C R O A N A L O G PT100 select
M I C R O A N A L O G sets a new standard in
signal ...
Ordering data
Screw connection
Tension clamp connection
Technical data*
Input (selectable)
Input resistance
Input resistance with current input
Input resistance with voltage input
Overload
Input ... select
MICROANALOG DC/DC select
• 3-way Isolation between Input,
Output, and Supply voltage
• DIP-Switch selectable
• Supply voltage cross-connectable
• Low heat dissipation
DC/DC -Signal Conditioner
Schematic...
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Electronic Devices for Analog Signal Processing ppt
Ngày tải lên :
31/03/2014, 18:20
... input signal changes
times, then the amplitude of the output signal also changes times, and the output signal
corresponding to the sum of input signals is equal to the sum of output signals ... linear
operations with analog input signals: multiplication of signal by a constant (scaling),
summation or subtraction, differentiation or integration of signals, transformation of signal
spectrum ... input signal
output signal enriches, and higher harmonics, which were absent in the spectrum of
the input signal, arise in addition to the first harmonic. The amplitude spectrum of
the output signal...
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Digital Signal Processors
Ngày tải lên :
13/09/2012, 09:50
... be taken:
Chapter 28- Digital Signal Processors 513
Program
Memory
Data
Memory
instructions and
secondary data
data only
Address
PM Data
Generator
Address
DM Data
Generator
Data
Registers
Muliplier
ALU
Shifter
DM ... the
Chapter 28- Digital Signal Processors 511
Memory
data and
instructions
Program
Memory
Data
Memory
instructions and
secondary data
data only
Program
Memory
Data
Memory
instructions only
data only
a. ... Harvard Architecture ( )
CPU
address bus
data bus
PM address bus
PM data bus
PM address bus
PM data bus
DM address bus
DM data bus
CPU
DM address bus
DM data bus
single memory
dual memory
dual...
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The Scientist and Engineer's Guide to Digital Signal Processing Second Edition
Ngày tải lên :
13/09/2012, 10:21
... 35
The Sampling Theorem 39
Digital- to -Analog Conversion 44
Analog Filters for Data Conversion 48
Selecting the Antialias Filter 55
Multirate Data Conversion 58
Single Bit Data Conversion 60
Chapter ... (Transform Compression) 494
MPEG 501
Chapter 28. Digital Signal Processors 503
How DSPs are different 503
Circular Buffering 506
Architecture of the Digital Signal Processor 509
Fixed versus Floating ... Probability and Noise 11
Signal and Graph Terminology 11
Mean and Standard Deviation 13
Signal vs. Underlying Process 17
The Histogram, Pmf and Pdf 19
The Normal Distribution 26
Digital Noise Generation...
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Introduction to Digital Signal Processing and Filter Design
Ngày tải lên :
13/09/2012, 10:21
... discrete-time signals are
described. A brief history of analog and digital filter design is given. Then the
advantages of digital signal processing over continuous-time (analog) signal pro-
cessing ... what are the advantages of digital signal processing instead
of analog signal processing, even though digital signal processing requires more
circuits compared to analog signal processing?
x(n)
y(n)
z
−1
z
−1
z
−1
ΣΣ
Σ
Σ
Figure ... can be considered a bandlimited signal. It is this signal that
is sampled and converted to a discrete-time signal and coded to a digital signal
by the analog- to -digital converter (ADC) that was...
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- digital data to analog signal encoding
- digital data to analog signal encoding techniques
- digital data to analog signal conversion
- converting digital data to analog signal
- convert digital data into analog signal
- device that converts digital data to analog signal
- with respect to converting digital data into analog signals am stands for
- conversion of digital data to analog signal
- routers convert digital data into analog signals
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