Fundamentals of Spread Spectrum Modulation phần 2 potx
Fundamentals of Spread Spectrum Modulation phần 2 potx
... descriptions of two generic spread spectrum modulation
techniques—QPSK spreading and frequency-hop spread spectrum.
book Mobk087 August 3, 20 07 13:15
FUNDAMENTALS OF SPREAD SPECTRUM MODULATION 11
4 SPREADING ... +cos
(
π/M
)
2cos
(
π/M
)
×Q
2m
1 −cos
π
M
E
b
N
0
m = log
2
M, M > 2
11.2dB, M = 2
12. 9dB, M = 4
16.8dB, M = 8
21 .4dB, M = 16
26 .3dB,...
Fundamentals of Spread Spectrum Modulation phần 1 potx
... Introduction 1
2 ReviewofBasicDigitalModulationTechniques 3
3 TypesofSpreadSpectrumModulation 7
4 Spreading Codes . 11
5 Code Acquisition and Tracking [1] 24
6 Performance of Spread Spectrum Systems ... permission of the publisher.
Fundamentals of Spread Spectrum Modulation
Rodger E. Ziemer
www.morganclaypool.com
ISBN-10: 159 829 2641 paperback
ISBN-13: 978159 829 2640 p...
Fundamentals of Spread Spectrum Modulation phần 3 doc
... SEQUENCE
001 100 123 1
010 01033 32
003 300 321 3
0 12 2101310
020 020 222 0
021 120 3011
031 13 023 03
1 12 211 322 1
133 33 122 32
For the 11 Mbps data rate, each symbol represents eight bits of information. At the ... 0. 629
5 31 14. 32 0.4 62
6 63 23 .35 0.371
7 127 35.34 0 .27 8
8 25 5 52. 47 0 .20 6
9 511 77. 62 0.1 52
TABLE 5: Initial Loads and Sequences for the S(0)
Fam...
Fundamentals of Spread Spectrum Modulation phần 4 pot
... n
P
N
0
B
+1
,
σ
2
V
= 2n
2P
N
0
B
+1
,
(5.7)
respectively.
book Mobk087 August 3, 20 07 13:15
FUNDAMENTALS OF SPREAD SPECTRUM MODULATION 31
() ()
()
or
s
tnt
nt
+
()
2
()
0
2
i
t
tT
d
N
α
−
∫
FIGURE 12: ... −1
)
T
da
2 − P
d
2P
d
+
T
i
P
d
,
σ
2
T
s
≈ T
2
da
C
2
1
12
−
1
P
d
+
1
P
2
d
,
(5 .2)
where
T
s
= mean time to acquire proper synchronizati...
Fundamentals of Spread Spectrum Modulation phần 5 pot
... 13:15
FUNDAMENTALS OF SPREAD SPECTRUM MODULATION 39
This can be simplified to
T
da
=
p
10
(
T
1
+ p
12
p
21
T
2
)
(
1 − p
12
p
21
)
2
+
p
12
p
23
p
34
(
T
1
+ T
2
)
(
1 − p
12
p
21
)
2
(
1 − p
33
)
+
p
12
p
23
p
34
T
3
(
1 ... obtain
T
da
=
p
10
(
p
12
p
21
T
2
+ T
1
)
(
1 − p
12
p
21
)
2
−
[
p
12
p
21
T
3
+ p
33
(
T
1
+ T
2
)
− T
1
− T...
Fundamentals of Spread Spectrum Modulation phần 6 ppt
... Thus,
σ
2
δ, TDL
=
1
2
L
1.811 +
3 .26 1
ρ
IF
=
1
2
(
500
)
1.811 +
3 .26 1
10
=
2. 1371
2
(
500
)
=2. 1371 ×10
−3
s
2
,
σ
2
δ,DLL
=
1
2
L
1 +
2
ρ
IF
=
1
2
(
500
)
1 +
2
10
=
1 .2
2
(
500
)
= ... 12 dB
M = 4
FIGURE 24 : Performance of a FH/MFSK noncoherent spread- spectrum system in barrage noise
jamming.
book Mobk087 August 3, 20 07 13:15
FUNDA...
Fundamentals of Spread Spectrum Modulation phần 7 ppsx
... 20 07 13:15
FUNDAMENTALS OF SPREAD SPECTRUM MODULATION 57
0 5 10 15 20 25 30 35 40
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
P/J W/R, dB
P
b
FIGURE 27 : Bit error probability for the FH/DPSK spread spectrum ... August 3, 20 07 13:15
56 FUNDAMENTALS OF SPREAD SPECTRUM MODULATION
5 10 15 20 25 30 35 40
10
-4
10
-3
10
-2
10
-1
P/J W/R, dB
P
b
M = 2
M = 4
M = 8
M =...
Fundamentals of Spread Spectrum Modulation phần 8 pot
... d
f
+2 d
f
+3 d
f
+4 d
f
+5 d
f
+6 d
f
+7
3 (7, 5) 5 1 4 12 32 80 1 92 448 1 024
4 (15, 15) 6 2 7 18 49 130 333 836 20 69
5 (35, 23 ) 7 4 12 20 72 225 500 1, 324 3680
6 (75, 53) 8 2 36 32 62 3 32 701 2, 3 42 ... [16]
nktnktnkt
31 21 2 255 24 7 1 511 5 02 1
16 3 23 1 3 484 3
11 5 22 3 4 466 5
63 57 1 21 5 5 448 7
* 45 3 20 7 6 430 9
& 30 6 * 191 8 4 12 11
24 7...
Fundamentals of Spread Spectrum Modulation phần 9 doc
... Claypool, 20 06.
78 FUNDAMENTALS OF SPREAD SPECTRUM MODULATION
book Mobk087 August 3, 20 07 13:15
76 FUNDAMENTALS OF SPREAD SPECTRUM MODULATION
0 5 10 15 20 25 30
10
- 12
10
-10
10
-8
10
-6
10
-4
10
-2
10
0
E
b
/N
0
, ... book Mobk087 August 3, 20 07 13:15
74 FUNDAMENTALS OF SPREAD SPECTRUM MODULATION
0 5 10 15 20 25 30 35 40 45 50
10
-8
10
-7
10
-6
10...
Fundamentals of Spread Spectrum Modulation docx
... to
T
da
=
p
10
(
T
1
+ p
12
p
21
T
2
)
(
1 − p
12
p
21
)
2
+
p
12
p
23
p
34
(
T
1
+ T
2
)
(
1 − p
12
p
21
)
2
(
1 − p
33
)
+
p
12
p
23
p
34
T
3
(
1 − p
12
p
21
)(
1 − p
33
)
2
. (5.33)
Recall that ... − p
12
p
21
)
2
×
p
10
(p
12
p
21
T
2
+ T
1
) −
[
p
12
p
21
T
3
+ p
33
(
T
1
+ T
2
)
−T
1
−T
2
−T
3
]
p
12
p
23
p
34
(...
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