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HỌC VIỆN CƠNG NGHỆ BƯU CHÍNH VIỄN THƠNG
---------------------------------------------------
BÀI GIẢNG:
X
TÍN HIỆU S
TH I GI N TH C
PT
IT
(Dùng cho các sinh viên ngành Điện-Điện tử)
HÀ NỘI, 12/2014
Môc lôc
THU T NG
VÀ CH
VI T T T ............................................................................................ v
I MỞ ĐẦU ................................................................................................................................ 1
IT
CHƯ NG I GI I THIỆU X
TÍN HIỆU S TH I GI N TH C .......................... 3
1.1. C
ệ
DSP
...................................................... 4
1.2. G
ệ
............................................................................................................. 5
1.2.1.
u .................................................................................................. 5
1.2.2.
...................................................................... 6
1.2.3.
............................................................................................ 7
1.3. P
DSP ..................................................................................................................... 8
1.3.1.
.................................................................................. 8
1.3.2.
.................................................................................................... 9
1.3.3.
....................................................... 11
1.3.4.
................................................................................. 11
1.4. T
ệ
DSP ....................................................................................................... 12
1.4.1.
............................................................................................. 12
1.4.2.
................................................................................... 13
1.4.3.
.............................................................................................. 14
1.5.
............................................................................................................................... 14
PT
CHƯ NG II BỘ X
TÍN HIỆU S TMS32 C55 ......................................................... 15
2.1. G
ệ ............................................................................................................................. 15
2.2.
TMS32 C55 ..................................................................................................... 15
2.2.1.
............................................................................................... 16
2.2.2.
.................................................................................................................. 19
2.2.3.
n chip .............................................................................................. 19
2.2.4.
................................................................................. 21
2.2.5.
................................................................................................ 23
2.3. C
TMS32 C55 ................................................................................................ 26
2.3.1.
..................................................................................... 27
2.3.2.
...................................................................................... 27
2.4. C
TMS32 C55 ...................................................................... 28
2.4.1.
........................................................................... 28
2.4.2.
........................................................................... 29
2.4.3.
.......................................................................... 29
2.4.4.
........................................................ 29
2.4.5.
.................................................................... 30
2.4.6.
....................................................................................... 30
2.5.
............................................................................................. 30
2.5.1.
..................................................................................... 30
2.5.2.
................................................................................................ 31
2.6. T
ệ
TMS32 C55 ............................................................................................... 32
2.7.
TMS32 C55 .............................................................................. 35
2.7.1.
................................................................................................ 35
ii
2.7.2.
............................................................................ 36
2.8.
C
TMS32 C55 .......................................................................................... 38
2.8.1.
..................................................................................................... 39
2.8.2.
.................................................................... 39
2.9.
C
...................................................................... 40
2.10.
n ............................................................................................................................... 40
IT
CHƯ NG III THI T
CÁC BỘ ỌC FIR VÀ IIR ........................................................... 41
3.1. G
ệ
................................................................................................................. 41
3.1.1.
................................................................................... 41
3.1.2.
................................................................. 43
3.2. Th
FIR ...................................................................................................... 43
3.2.1.
..................................................................................... 44
3.2.2.
................................................................................... 46
3.2.3.
.................................................................................................. 49
3.2.4.
...................................................................................................... 51
3.2.5.
..................................................................... 56
3.2.6.
................................................... 57
3.3. T
IIR ............................................................................................................. 65
3.3.1.
.................................................................. 65
3.3.2.
....................................................................................................... 73
3.3.3.
.............................................................................................. 78
3.3.4.
...................................................................... 84
3.4.
............................................................................................................................... 92
PT
CHƯ NG IV BỘ ỌC THÍCH NG ...................................................................................... 93
4.1. G
ệ
................................................................................. 93
4.2. C
........................................................................................................... 95
4.2.1.
......................................................................................... 96
4.2.2.
.......................................................................................................... 97
4.3.
............................................................................................................................. 101
CHƯ NG V BI N ĐỔI FOURIER NH NH (FFT) ............................................................. 102
5.1. G
ệ FFT .................................................................................................................. 102
5.1.1.
f
N .......................................................................................................................... 102
5.1.2.
f
......................................................................................... 104
5.2. P
.................................................................................................................... 108
5.3.
....................................................................................... 109
5.4.
............................................................................................................................. 113
CHƯ NG VI MỘT S
NG DỤNG CỦ DSP TRONG TH C T ................................ 114
6.1. C
........................................................................................................... 114
6.1.1.
-Table ................................................................................ 114
6.1.2.
....................................................................... 117
6.1.3.
.................................................................................................. 118
6.2. P
ệ
DTMF ........................................................................................................ 122
6.2.1.
................................................................... 122
iii
6.2.2.
6.2.3.
6.3.
............................................................................................. 123
.......................................... 126
............................................................................................................................. 128
HẢO......................................................................................................... 129
PT
IT
TÀI IỆU TH M
iv
THU T NG
T
VÀ CH
T
VI T T T
T
ADC
Analog-to-Digital Converter
ALU
Arithmetic and Logic Unit
AMR
Adaptive Multi Rate
ASIC
Application-Specific
Vệ
-
Integrated
Circuit
fl w Unit
AU
Address-
CCS
Code Composer Studio
CDP
ffi
Data Pointer
Code-Excited Linear Predictive
CODEC
Coder/Decoder
CRC
Cyclic Redundant Codes
DAC
Digital-to-analog converter
DCT
Discrete cosine transform
DFT
Fourier transform
DMA
Direct memory access
DSP
Digital Signal Processing
Code-Excited
IT
CELP
PT
-
DTFT
Discrete-time Fourier transform
DTMF
dual-tone multi-frequency
ECC
Error-correction code
FEC
Forward error correction
FFT
Fast Fourier transform
FPGA
Field-programmable gate array
IDCT
Inverse discrete cosine transformation
IDFT
Inverse discrete Fourier transform
IFFT
Inverse fast Fourier transform
MDCT
fi
MMRs
Memory mapped registers
MSE
Mean-Square Error
PAB
Program-read address bus
PB
Program-read data bus
PC
Program counter
PDP
Peripheral data-page pointer
v
PDS
QMF
fi
Real-time transport protocol
PT
IT
RTP
Power density spectrum
vi
I MỞ ĐẦU
PT
IT
c.
1
TMS320C55x
3
IIR.
C
1
5
FFT.
ễ
-
Email:
PT
IT
tháng 12/2014
2
CHƯ NG I
TÍN HIỆU S
GI I THIỆU X
TH I GI N TH C
ễ
IT
ễ
PT
ễ
n n
in
t:
ễ
ễ
f
n n t it
3
n n tin
không
t
: DSP
IT
PT
ễ
ễ
.
1.1. C
ệ
DSP
g
I-1
4
H
1.2. G
Trong
I-1 S
ệ
DSP
ệ
I-1:
−∞
∞
IT
x(t) g.x ' (t) .
PT
1.2.1. Q
I-1
-
H
I-2 S
I-2.
DC
ng
1.
5
B
2.
ễ
ễ
ễ
I-2
T
1
fs
IT
fs
∞
PT
mô
H
I-3 V
ễ
ệ
I-3
()
c t=nT.
ệ
( T)
fs
fM
fM
fN=fs
t fs=2fM
-fs/2, fs
1.2.2. Q
C
ễ
)
.
6
B
ễ
ễ
1.2.3. C
ệ
IT
PT
TLV320AIC23 (AIC23).
f
-
delta:
-
7
ễ
f
f
ễ
n-1
-
f
ễ
-
I-4
-
PT
IT
ễ
H
1.3. P
1.3.1. C
1.
2. FPGA
3.
I-4 S
DC
-
DSP
DSP
;
(μP/μC);
4.
8
5.
I-1.
B
T
I-1 T
DSP
ASIC
μP/μC
FPGA
Không
Cao
-cao
Cao
C
DSP
Cao
Cao
DSP
processor
-
-
- Cao
Cao
Chi
Cao
-
-
-
1.3.2. C
IT
Cao
DSP
B
DSP
ệ
H
PT
N
I-2 C
Texas Instruments
Analog devices
TMS320C24x
40 MHz
TMS320C28x
150 MHz
TMS320C54x
160 MHz
TMS320C55x
300 MHz
TMS320C62x
300 MHz
TMS320C64x
1 GHz
TMS320C67x
300 MHz
ADSP-218x
80 MHz
ADSP-219x
160 MHz
ADSP-2126x
200 MHz
ADSP-2136x
333 MHz
ADSP-BF5xx
750 MHz
ADSP-TS20x
600 MHz
DSP56300
Freescale
T
, 24 bit
275 MHz
DSP568xx
40 MHz
DSP5685x
120 MHz
9
N
T
H
Agere
MSC71xx
200 MHz
MSC81xx
400 MHz
DSP1641x
285 MHz
-
-
IT
PT
-
-
-
-
-
-
-
w-
10
IT
1.3.3. C
.
PT
ễ
1.3.4. C
ễ
p
tp + t0 < T
0
11
ệ
ng DSP
PT
IT
1.4. T
H
I-5 Q
ệ
DSP
1.4.1. P
MATLAB, Simulink,
C/C++)
1.
12
2.
ễ
f
3.
ễ
4.
ễ
ễ
5.
H
I-6 P
IT
.
DSP
DSP
PT
1.4.2.
.
ễ
V
MIPS –
MOPS –
MFLOPS –
13
MHz –
p
MMACS –
w
w
PT
IT
1.4.3. P
.
1.5.
14
CHƯ NG II
TÍN HIỆU S TMS320C55x
BỘ X
nh
TMS320C55x.
2.1. G
ệ
- -
IT
Texas Instruments
-
PT
ễ
-khơng (zero-overhead)
TMS32 C55
2.2.
1.
2.
3.
15
PT
IT
4.
H
II-1 S
ệ
CPU TMS32 C55 :
TMS 32 C55
2.2.1. T
H
II-2 S
C55 IU
16
ra trong
II-2
PU, AU,
DU.
IU
thi
PT
IT
II-3
H
II-3 S
C55 PU
Tuy nhiên
II-4
8 thanh ghi XARS 23 bit (XAR0-XAR7)
-T3)
17
C55
IT
II-4 S
PT
H
H
II-5 S
U
C55 DU
II-5
-
f
18
f
-32
31
i 31 bit).
2.2.2. C
II-1
f
-speed).
-0xFFFFFF.
DB)
IT
16-bit (BB, CB,
PT
(BAB, CAB, and DAB).
2.2.3. C
H
II-6
-127) và
19
