digital data analog signal
DIGITAL DATA TRANSMISSION - I
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...
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 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
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... 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
... 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 ... 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...
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- 4
Analog-to-Digital Conversion
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29/09/2013, 20:20
... to hear. The
process to convert digital signals to analog signals is completed by a DAC. The most commonly
used technique to convert digital signals to analog signals is the summation method ... Quantization.
ANALOG- TO -DIGITAL CONVERSION 55
3.3.2 Integration
The integration technique uses an integrator, a comparator, and a controller to convert analog
signals to digital signals. A sampled analog signal ... v
1/2
1/4
1/8
1/2
n
Adder
Quantized
Analog
Signal
Scalar
Multipliers
FIGURE 3.11: A summation method to convert a digital signal into a quantized analog signal.
Comparators are used to clean up incoming signals, and...
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Introduction to Digital Signal Processing and Filter Design - Introduction
Ngày tải lên :
29/09/2013, 21:20
... (VLSI) technology. The analog signals were con-
verted to sampled data signals by these filters and the signal processing was
treated as analog signal processing. But later, the signals were transitioned ... called the digital signal. Although there is a difference between
the discrete-time signal and digital signal, in the next few chapters we assume
that the signals are discrete-time signals and ... output data decrease.
For example, data on a few ADCs currently available are given in Table 1.3 [3].
Hence digital signal processing is restricted to approximately one megahertz,
and analog signal...
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Digital Signal Processing
Ngày tải lên :
16/10/2013, 01:15
... abgetasteten
Signal nur die Werte zu den Abtastzei-
ten, gibt das Abtasttheorem Auskunft,
ob alle Signalinformationen in den
abgetasteten Werten enthalten sind
oder nicht:
Enthält ein Signal nur Signalanteile ... sind lediglich niedrigere Töne
66
Digital
Signal Processing
Kursteil 2: Abtasten
und digitale Filtertechnik
Nachdem wir in der letzten Folge das Abtasten von Signalen erklärt
hatten, kommen wir ... Ausgangssignals
anzusehen. Dazu muß man aber erst
einmal die Möglichkeit kennenlernen,
Spektren von Signalen zu berechnen
und zu betrachten.
S
PEKTRUMS
-A
NALYSER
Was wäre ein Kurs über digitale...
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Digital Signal Processing Handbook P52
Ngày tải lên :
17/10/2013, 11:15
... methods.
52.1.1 Signal Chain
We assume a model where the input signal is properly bandlimited and digitized by an appropriate
analog- to -digital converter. All subsequent processing in the encoder will be digital. ... The decoder is
also digital up to the digital- to -analog converter, which is followed by a lowpass reconstruction filter.
Under idealized conditions, the interconnection of the signal chain excluding ... encoded/decoded signal and the original
signal. Usually, distortion is measured by a single number for a given coder and bit rate. There are
numerous ways of mapping an error signal onto a single...
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Digital Signal Processing Handbook P3
Ngày tải lên :
17/10/2013, 11:15
... func-
tions on a fixed-point digital signal processor,
IEEE Trans. Industr. Electron.,
41, 70–78, Feb.
1994.
[17] Ebert, P.M., Mazo, J.E. and Taylor, M.G., Overflow oscillations in digital filters,
Bell ... Considerations
Linear-phaseFIR digital filters can generally be implementedwith acceptablecoefficient quantization
sensitivity using the direct convolution sum method. When implemented in this way on a digital
signal ... second-order state-space digital filter structures,
IEEE Trans. Circuits Syst. II,
39, 90–98,
Feb. 1992.
[3] Proakis, G.J. and Manolakis, D.J.,
Introduction to Digital Signal Processing,
NewYork,...
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