Code Division Multiple Access (CDMA) phần 5 ppt
Code Division Multiple Access (CDMA) phần 5 ppt
... low-powered
Out-of-cell
interference
Out-of-cell
interference
Out-of-cell
interference
Mobiles
FIGURE 3 .5: Illustration of the uplink of a cellular CDMA system.
P1: IML/FFX P2: IML
MOBK023-03 MOBK023-Buehrer.cls September 28, 2006 15: 55
74 CODE DIVISION MULTIPLE ACCESS (CDMA)
0 50 0 1000 150 0
0
0.002
0.004
0.006
0.008
0.01
0.012
0.014
0.016
0.018
0.02
Total ... P2: IML
MOBK02...
Code Division Multiple Access (CDMA) phần 1 doc
... Cancellation 147
5. 4.4 Multistage Receivers 149
5. 5 A Comparison of Sub-Optimal Multiuser Receivers 156
5. 5.1 AWGN Channels 156
5. 5.2 Near-Far Performance 157
5. 5.3 Rayleigh Fading 160
5. 5.4 Timing ... 28, 2006 15: 54
Code Division Multiple Access
(CDMA)
i
P1: IML/FFX P2: IML/FFX QC: IML/FFX T1: IML
MOBK023-FM MOBK023-Buehrer.cls September 28, 2006 15: 54
Code Divis...
Code Division Multiple Access (CDMA) phần 2 doc
... September 28, 2006 15: 54
MULTIUSER COMMUNICATIONS 15
0 5 10 15 20 25 30 35 40 45 50
0
0.1
0.2
0.3
0.4
0 .5
0.6
0.7
0.8
0.9
1
SIR
Probability that
SIR
> abcissa
TDMA
CDMA
FIGURE 1 .5: Empirical CDFs ... MOBK023-Buehrer.cls September 28, 2006 15: 54
10 CODE DIVISION MULTIPLE ACCESS (CDMA)
1
3
5
4
5
4
7
2
6
6
3
5
7
3
4
2
6
7
2
1
1
1
1
1
1
7
6
5
2
3
4
6
5
7
FIG...
Code Division Multiple Access (CDMA) phần 3 potx
... September 28, 2006 15: 54
44 CODE DIVISION MULTIPLE ACCESS (CDMA)
0 0 .5 1 1 .5 2 2 .5 3 3 .5 4
×10
−8
0 0 .5 1 1 .5 2 2 .5 3 3 .5 4
×10
−8
0 0 .5 1 1 .5 2 2 .5 3 3 .5 4
×10
−8
0 0 .5 1 1 .5 2 2 .5 3 3 .5 4
×10
−8
1
0
1
1
0
1
1
0
1
1
0
1
Time ... MOBK023-Buehrer.cls September 28, 2006 15: 54
32 CODE DIVISION MULTIPLE ACCESS (CDMA)
−20 − 15 −10 5 0 5...
Code Division Multiple Access (CDMA) phần 4 pdf
... September 28, 2006 15: 54
SPREAD SPECTRUM TECHNIQUES FOR CODE DIVISION MULTIPLE ACCESS 55
0 0 .5 1 1 .5 2 2 .5 3
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
×10
−3
CW
25 MHz
100 MHz
2 25 MHz
400 MHz
50 0 MHz
Normalized ... 2006 15: 54
56 CODE DIVISION MULTIPLE ACCESS (CDMA)
-
15
-
10
-
5 0 5 10
0
0.1
0.2
0.3
0.4
0 .5
0.6
0.7
0.8
0.9
1
Normalized received power (...
Code Division Multiple Access (CDMA) phần 6 docx
... IML
MOBK023-03 MOBK023-Buehrer.cls September 28, 2006 15: 55
94 CODE DIVISION MULTIPLE ACCESS (CDMA)
0 5 10 15 20 25 30 35
0
0 .5
1
1 .5
2
2 .5
3
Number of simultaneous users
SNR
required to achieve ... September 28, 2006 15: 55
102 CODE DIVISION MULTIPLE ACCESS (CDMA)
0 0.1 0.2 0.3 0.4 0 .5 0.6 0.7 0.8 0.9 1
0
0 .5
1
1 .5
2
AWGN channel
0 0.1 0.2 0.3 0.4...
Code Division Multiple Access (CDMA) phần 7 pps
... MOBK023-Buehrer.cls September 28, 2006 15: 55
114 CODE DIVISION MULTIPLE ACCESS (CDMA)
Node 1
Node 2
Node 3
Node 4
Node 5
Node 6
Node 7
Common code
Common code
C
o
d
e
#
4
C
o
d
e
#
2
Primary ... IML
MOBK023-04 MOBK023-Buehrer.cls September 28, 2006 15: 55
118 CODE DIVISION MULTIPLE ACCESS (CDMA)
indicator of the success or failure of packet access since...
Code Division Multiple Access (CDMA) phần 8 potx
... in
Section 5. 5.
P1: IML/FFX P2: IML
MOBK023-04 MOBK023-Buehrer.cls September 28, 2006 15: 55
126
P1: IML/FFX P2: IML
MOBK023- 05 MOBK023-Buehrer.cls September 28, 2006 15: 56
138 CODE DIVISION MULTIPLE ACCESS ... IML
MOBK023-04 MOBK023-Buehrer.cls September 28, 2006 15: 55
SPREAD SPECTRUM PACKET RADIO NETWORKS 1 25
0 50 100 150 200 250 300 350 400
0
0. 05
0.1
0. 15
0.2
0. 25...
Code Division Multiple Access (CDMA) phần 9 docx
... =0
(−1)
s
P
s
RAb +
M
s =0
(−1)
s
P
s
n (5. 88)
P1: IML/FFX P2: IML
MOBK023- 05 MOBK023-Buehrer.cls September 28, 2006 15: 56
150 CODE DIVISION MULTIPLE ACCESS (CDMA)
Mathematically, we can represent ... ρb
2
− ρsgn(b
2
+ ρb
1
+ n
2
) + n
1
(5. 75)
P1: IML/FFX P2: IML
MOBK023- 05 MOBK023-Buehrer.cls September 28, 2006 15: 56
160 CODE DIVISION MULTIPLE ACCESS...
Code Division Multiple Access (CDMA) phần 10 pot
... IML
MOBK023- 05 MOBK023-Buehrer.cls September 28, 2006 15: 56
172 CODE DIVISION MULTIPLE ACCESS (CDMA)
Gaussian random variable with a standard deviation of 150 Hz. We see that an approximately
2 .5 times ... P2: IML
MOBK023- 05 MOBK023-Buehrer.cls September 28, 2006 15: 56
164 CODE DIVISION MULTIPLE ACCESS (CDMA)
to make symbol decisions and the received signal can...
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