ADVANCED TOPICS IN DIGITAL SIGNAL PROCESSING

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ADVANCED TOPICS IN
DIGITAL SIGNAL PROCESSING
An Examination of DSP in Modern
Fourth Generation Modems
ADVANCED TOPICS IN
ADVANCED TOPICS IN
DIGITAL SIGNAL PROCESSING
DIGITAL SIGNAL PROCESSING
An Examination of DSP in Modern
An Examination of DSP in Modern
Fourth Generation Modems
Fourth Generation Modems
fred
fred
harris
harris
San Diego State University
San Diego State University
40 Ð Vol. 72 Register online at
www.aticourses.com
or call ATI at 888.501.2100 or 410.531.6034
Instructor
Dr. fred harris teaches at San Diego State University
where he occupies the CUBIC Signal Processing Chair.
His teaching and research areas include Digital Signal
Processing,Multirate Signal Processing,
Communication Systems,Source Coding and Modem
Design. He has extensive practical experience in
communication systems,high performance modems,
sonar and advanced radar systems and high
performance laboratory instrumentation. He holds a
number of patents on Multirate Signal Processing for
Satellite and Cable Modems and lectures throughout the
world on DSP applications. He consults for
organizations requiring high performance,cost-
effective DSP solutions and has contributed to a number
of textbooks and handbooks on various aspects of signal
processing.
Summary
This four-day course is designed for communication
systems engineers,programmers,implementers and
managers who need to understand current practice and
next generation DSP techniques for upcoming
communication systems. DSP is more than mapping
legacy analog designs to a DSP implementation. To
avoid compromise solution appropriate for an earlier
time period,we return to first principles to learn how
to apply new technology capabilities to the design of
next generation communication systems.
Course Outline
1.Introduction.An examination of Past,Present,and Future Digital
Modulation Systems.
2.Digital Filters.FIR Filters,Resampling Filters,Interpolators and
Decimators,Half Band Filters,Cascade-Integrator-comb (CIC) filters,
Hogenauer Filters,Multirate IIR filters.
3.Channelizers.Modulation and Demodulation. Design Techniques.
Workload Comparisons.
4.Filter Design Techniques.Window Designs and Performance
considerations. Equiripple Designs. System Considerations. Options to
Improve System Performance. Finite ArithmeticWindow Designs and
Performance considerations. Equiripple Designs. System
Considerations. Options to Improve System Performance. Finite
Arithmetic.
5.Digital Baseband Transmission.The Nyquist Filter,Excess
Bandwidth,Matched Filters,Square-Root Nyquist Filter,Shaping and
Up-Sampling Filters.
6.Pre-and Post-Signal Conditioning.Analog Filters,Timing Jitter,
Direct Digital Synthesizers,CORDIC processors,Digital Oscillators,
Interpolating and Decimating Filters in A-to-D and D-to-A,AGC,DC
Canceling,I-Q Balancing.
7.Sigma-Delta Converters.A-to-D,D-to-A,D-to-D. Multi-loop
Converters,Wide-Band Converters. System Considerations.
8.Carrier Centered Modulation and Demodulation.Shaping and
Interpolation,QPSK,QAM,Digital IF Options,OFDM,Legacy
Analog modulation and Demodulation in DSP. FM Modulation and
demodulation.
9.Synchronization.The Phase Locked Loop,Proportional plus Integral
Loops,Phase Recovery,Band Edge Filters in Frequency Recovery,
Timing Recovery,Polyphase Filters in Timing Recovery.
10. Adaptive Filters.LMS Algorithm,RLS Algorithm,Lattice Filters,
Linear Equalization,Adaptive Equalization,Decision Feedback
Equalizers,Constant Modulus (Blind) Equalizers.
11. Modem Structures.Wireline,Cable,Satellite,and Terrestrial modems
and considerations.
What You Will Learn
¥ How to size and design filters for a specified
processing task
¥ Effects of Finite Arithmetic on Different Filter
Architectures
¥ Understand Multi-rate Signal processing for
Sample Rate Changes
¥ Understand Multi-rate Signal processing for
Intentional Aliasing
¥ DSP Based Signal Enhancement and Signal
Conditioning
¥ DSP Based Synchronization Techniques
¥ Limitations and Boundaries of DSP Based
Solutions
Advanced Topics in Digital Signal Processing
An Examination of DSP in Modern Fourth Generation Modems
June 21-24, 2004
8:30am - 4:30pm
Washington DC/Maryland
$1495
What you will Learn

How to Size and Design Efficient Digital Filters

Effects of Finite Arithmetic on Different Filter
Architectures

Understand Multirate Signal processing for Sample Rate
Changes

Understand Multirate Signal processing for Intentional
Aliasing

DSP Based Signal Enhancement and Signal Conditioning

DSP Based Synchronization Techniques

Limitations and Boundaries of DSP Based Solutions
Topics
•D
i
g
i
t
a
l
F
i
l
t
e
r
s
•C
h
a
n
n
e
l
i
z
e
r
s

Filter Design Techniques

Digital Baseband Transmission

Pre and Post Signal Conditioning

Sigma-Delta Converters

Carrier Centered Modulation and Demodulation

Synchronization
•A
d
a
p
t
i
v
e
F
i
l
t
e
r
s

M
odem Structures
What the Customer Expects
It all Started with….
Regenerative Receiver
TRF: Tuned Radio Frequency
Note Real Breadboard
Superheterodyne
Patent Disclosure: June 3, 1918
Receiver Requires Copy of Carrier
x(t)
A cos(
t)
ω0
cos
(
t
+
(
t))
ωθ
0
cos(
(
t
)
)
θ
sign
[c
o
s(
t
)]
ω0
N(t)
Lo
w
Pa
s
s
F
ilte
r
Id
e
a
l
Chan
nel
x(t)
A cos(
t)
ω0
Low Pa
ss
F
ilt
e
r
Id
ea
l
Channel
m
Sign
N(t)
A x
(
t)+
(t
)
NI
2
[
A+
A m
x
(t) +
(t)]
NI
2
π
A
2
9
5% e
ner
g
y i
n car
r
i
er
()

2
Carrier Recovery PLL
Harry Nyquist (1889-1960)
The Sampling Theorem
fS>BW
Analog to Digital Converter
The Modern Era
ADC and DSP Insertion
IF Sampling
Timing Correction in DSP Land
Digital Receiver: Asynchronous
Carrier and Sampling Clock
DSP Based Receiver
Pa
ra
llel
t
o
Ser
ia
l
Mapping
Al
go
r
i
thm
Po
lyphas
e
Mat
ched
F
i
lte
r
40-to
-1
Polyp
ha
se
Downsampl
e

Fi
lt
er
4-to-1
Po
ly
phas
e
Der
i
vati
ve
Mat
ched
Fil
ter

Polypha
se
Band-Edge
Filte
r

Tim
ing
Lo
op
AGC
Cont
rol
Equ
ali
zer
2-t
o-1
Down
sam
ple
LMS
Al
gor
i
thm
S
i
gnal

Pr
es
ent
Detec
to
r
C
arr
ier
Loo
p Filte
r
& D
D
S
De
te
ctor
Ana
l
og
Band P
ass
Filte
r
10
-BIT
ADC
State Mac
hi
ne
QPS
K
/QAM
Co
n
tr
ol
Sign
al
s
Ouput
Da
ta
0.2
5/0.5/1.0

MB/S

Binary

Symbo
l
s
125/250/500
Kw
or
ds/sec
Detect
ed
Symbols
12
5 K sy
m
/
se
c
250 KS/S
125 KS/S
40.0 MS/S
10.0 MS/S
Center
Fr
equency
Sel
ect
i
on
VG
A
-
*
Polyphase Multichannel Receiver

IF
ST
AG
E
ADC
PH
ASE-1
PHASE-39
PH
AS
E-0
TIM
IN
G
RC
VRY
VCO
PHASE
ROT
AT
O
RS
80-P
NT
Real
FFT
or

40-P
NT
Com
pl
ex
FFT
PHASE-
2
PH
AS
E-38
Ch
ann
el
S
e
l
e
ct
and
Pro
cess
fs
fc
...............
...............
...............
Time Series: 40-Channel
Polyphase Filter Bank
0
10
20
30
40
50
60
70
80
90
100
0
5
10
15
20
25
30
35
40
0
0.2
0.4
0.6
0.8
ti
m
e
cen
ter
f
r
eq
uen
cy
magnitude
Polyphase Channelize
1-Wideband and 7-Narrowband CDMA Signals
-6
-4
-2
0
2
4
6
-10
0
-8
0
-6
0
-4
0
-2
0
0
Spec
tra ups
ampl
e
d to 15.36 M
Hz
and up c
onv
erted in polypha
se f
i
l
t
er
Frequency (M
Hz)
Log-Mag (dB)
-2
0
2
-10
0
-8
0
-6
0
-4
0
-2
0
0
S
pec
trum: S-
1 a
t 6.144 M
Hz
-2
0
2
-100
-8
0
-6
0
-4
0
-2
0
0
Spectrum: S
-2 a
t 6.144 MH
z
-2
0
2
-1
00
-80
-60
-40
-20
0
S
pe
ctr
um: S
-3 at 6.144 MH
z
-2
0
2
-100
-80
-60
-40
-20
0
S
pec
trum: S-
4 at
6.144 M
Hz
-2
0
2
-
100
-80
-60
-40
-20
0
S
pe
ctr
um
: S
-
5 at 6.144 MHz
Related Publications
f.j harris,
“On the Relationship Between Multirate Polyphase FIR Filters and Windowed, Overlapped
FFT Processing”, Twenty-third Annual Asilomar Conference on Signals and Computers, 1989.

D. Elliot, Editor,
“Handbook of Digital Signal Processing: Engi
neering Applications”,
Academic Press, 1987, Chapte
r 8, “Time Domain Signal Processing with the DFT”, pp 639-666.
•f.j. harris and M. Rice,
“Multirate Digital Filters for Symbol Timing Synchronization in Software Defined Radi
os”,
IEEE Journal on Selected Areas in Communications, Vol. 19,
pp. 2346-2357, Dec. 2001.
•f.j. harris, C. Dick, and M. Rice,
“Digital Receivers and Transmitters Using Polyphase Filter Banks for Wireless
Communications”,
IEEE Microwave Theory and Techniques, Vol. 51, No. 4, April 2003, pp.1395-1412
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