analog modulation and demodulation
analog modulation and demodulation
... (offset).
EE4512 Analog and Digital Communications Chapter 6
Chapter 6
Chapter 6
Analog Modulation
Analog Modulation
and Demodulation
and Demodulation
•
•
Coherent Demodulation
Coherent Demodulation
of ... 309
-
-
315
315
EE4512 Analog and Digital Communications Chapter 6
Chapter 6
Chapter 6
Analog Modulation
Analog Modulation
and Demodulation
and De...
Báo cáo hóa học: " Research Article Adaptive Power Allocation in Wireless Sensor Networks with Spatially Correlated Data and Analog Modulation: Perfect and Imperfect CSI Muhammad Hafeez Chaudhary and Luc Vandendorpe" pptx
... Wireless Sensor Networks with
Spatially Correlated Data and Analog Modulation: Perfect and
Imperfect CSI
Muhammad Hafeez Chaudhary and Luc Vandendorpe
ICTEAM Institute, Universit
´
e Catholique ... Italy, June 2009.
[12] I. Bahceci and A. K. Khandani, “Linear estimation of corre-
lated data in wireless sensor networks with optimum power
allocation and analog modulation, ” IEEE...
Digital Communications I: Modulation and Coding Course
... bandwidth constraint
Nyquist bandwidth constraint:
The theoretical minimum required system bandwidth to
detect Rs [symbols/s] without ISI is Rs/2 [Hz].
Equivalently, a system with bandwidth ...
filter
Equalizing
filter
Threshold
comparison
For bandpass signals
Compensation for
channel induced ISI
Baseband pulse
(possibly distored)
Sample
(test statistic)
Baseband pulse
Received wav...
Modulation and coding course- lecture 10
... design and evaluation of the code.
Block codes are based on algebraic/combinatorial
techniques.
Convolutional codes are based on construction techniques.
Digital Communications I:
Modulation and ... we talked about:
Channel coding
Linear block codes
The error detection and correction capability
Encoding and decoding
Hamming codes
Cyclic codes
Lecture 10 11
Encoder r...
Modulation and coding course- lecture 9
... 7
Why using error correction coding?
Error performance vs. bandwidth
Power vs. bandwidth
Data rate vs. bandwidth
Capacity vs. bandwidth
(dB) /
0
NE
b
B
P
A
F
B
D
C
E
Uncoded
Coded
Coding ...
received polynomial by the generator polynomial.
With syndrome and Standard array, error is estimated.
In Cyclic codes, the size of standard array is considerably
reduced.
)()()( XXX eU...
Modulation and coding course- lecture 12
... NLDNLDNLD
NLDL
NLD
NLDT
One path with weight 5, length 3 and data weight of 1
One path with weight 6, length 4 and data weight of 2
One path with weight 5, length 5 and data weight of 2
Lecture 12 7
The Viterbi ... laser, a recorded disc and a photo-
detector.
Sources of errors are manufacturing damages,
fingerprints or scratches
Errors have bursty like nature.
Error correct...
Modulation and coding course- lecture 11
...
state
101
010
11
011
100
10
001
110
01
111
000
00
0
S
1
S
2
S
3
S
0
S
2
S
0
S
2
S
1
S
3
S
3
S
1
S
0
S
1
S
2
S
3
S
1/11
1/00
1/01
1/10
0/11
0/00
0/01
0/10
Input
Output
(Branch word)
Modulation, Demodulation and
Coding Course
Period 3 - 2007
Catharina Logothetis
Lecture 11
... BPSK modulation the transmitted sequence
corresponding to the codeword is denoted by
where and
and .
T...
Modulation and coding course- lecture 1
... User
Lecture 1 25
Bandwidth of signal …
Different definition of bandwidth:
a) Half-power bandwidth
b) Noise equivalent bandwidth
c) Null-to-null bandwidth
a) Fractional power containment bandwidth
b) ... digital
communication system (DCS):
Utilized techniques
Formatting and source coding
Modulation (Baseband and bandpass signaling)
Channel coding
Equalization
Synchronizat...
Modulation and coding course- lecture 2
... NRZ
Lecture 2 21
M-ary pulse modulation
M-ary pulse modulations category:
M-ary pulse-amplitude modulation (PAM)
M-ary pulse-position modulation (PPM)
M-ary pulse-duration modulation (PDM)
M-ary ... communication
systems
Some basic concepts and definitions as signal
classification, spectral density, random
process, linear systems and signal bandwidth.
Lecture 2 7
Al...
Tài liệu Modulation and coding course- lecture 3 pptx
... symbol
Mi ,,1 K
=
M-ary modulation
Lecture 3 13
Baseband and bandpass
Bandpass model of detection process is
equivalent to baseband model because:
The received bandpass waveform is first ... Sampling
Aliasing
Quantization
Uniform and non-uniform
Baseband modulation
Binary pulse modulation
M-ary pulse modulation
M-PAM (M-ay Pulse amplitude modulation)
Lecture...