Code Division Multiple Access (CDMA) phần 4 pdf
Code Division Multiple Access (CDMA) phần 4 pdf
... the multiple cell scenario
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MOBK023-02 MOBK023-Buehrer.cls September 28, 2006 15: 54
62 CODE DIVISION MULTIPLE ACCESS (CDMA)
0 2 4 6 8 10 12 14 16 18 20
10
-
6
10
-
5
10
-
4
10
-
3
10
-
2
10
-
1
10
0
E
b
/
N
o
... 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...
Code Division Multiple Access (CDMA) phần 1 doc
... 64
2.8 Multiple Access Performance of Frequency-Hopped
Code Division Multiple Access 67
2.9 Summary 71
3. Cellular Code Division Multiple Access 73
3.1 Principles of Cellular Code Division Multiple ... 28, 2006 15: 54
Code Division Multiple Access
(CDMA)
i
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MOBK023-FM MOBK023-Buehrer.cls September 28, 2006 15:...
Code Division Multiple Access (CDMA) phần 2 doc
... 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
FIGURE 1 .4: Classic frequency reuse for a reuse ... 15: 54
12 CODE DIVISION MULTIPLE ACCESS (CDMA)
The smallest valid value of Q greater than 6 .48 is then Q = 7
(
i = 2, j = 1
)
. Thus, the maxi-
mum numbe...
Code Division Multiple Access (CDMA) phần 3 potx
... 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 ... IML
MOBK023-02 MOBK023-Buehrer.cls September 28, 2006 15: 54
34 CODE DIVISION MULTIPLE ACCESS (CDMA)
The benefit of Gold codes is that a l...
Code Division Multiple Access (CDMA) phần 5 ppt
... 15:55
74 CODE DIVISION MULTIPLE ACCESS (CDMA)
0 500 1000 1500
0
0.002
0.0 04
0.006
0.008
0.01
0.012
0.0 14
0.016
0.018
0.02
Total interference power
2 signals
5 signals
20 signals
FIGURE 3.1: PDF ... 28, 2006 15:55
82 CODE DIVISION MULTIPLE ACCESS (CDMA)
3.1 .4 Statistical Multiplexing
The final fundamental CDMA concept that we will discuss in this section is ter...
Code Division Multiple Access (CDMA) phần 6 docx
... 15:55
100 CODE DIVISION MULTIPLE ACCESS (CDMA)
10 12 14 16 18 20 22 24 26
10
-
5
10
-
4
10
-
3
10
-
2
10
-
1
10
0
Number of CEs
Probability of blocking
Load = 2
Load = 3
Load = 4
Load = 5
FIGURE3. 14: ... September 28, 2006 15:55
1 04 CODE DIVISION MULTIPLE ACCESS (CDMA)
0 0.2 0 .4 0.6 0.8 1 1.2 1 .4 1.6 1.8 2
10
-
2
10
-
1
10
0
Fast Rayleigh fading channel
0...
Code Division Multiple Access (CDMA) phần 7 pps
... IML
MOBK023- 04 MOBK023-Buehrer.cls September 28, 2006 15:55
1 14 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
... 0
−1
N
n = 0
(4. 8)
Thus, for n = 2, the SIR is
SIR =
PR
2
11
[0]
PR
2
11
[2]
SIR = N
2
(4. 9a)
= 127
2
(4. 9b)
= 42 dB. (4. 9c)
4. 4 FREQUENCY-HOPPED PACKET RADIO...
Code Division Multiple Access (CDMA) phần 8 potx
... be
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144 CODE DIVISION MULTIPLE ACCESS (CDMA)
only affected by the Kth user’s signal, thus the average SINR is
=
P
K−1
σ
2
+
N
P
K
(5.52)
The ... IML
MOBK023- 04 MOBK023-Buehrer.cls September 28, 2006 15:55
126
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138 CODE DIVI...
Code Division Multiple Access (CDMA) phần 9 docx
... IML
MOBK023-05 MOBK023-Buehrer.cls September 28, 2006 15:56
158 CODE DIVISION MULTIPLE ACCESS (CDMA)
0 1 2 3 4 5 6 7 8 9 10
10
-
6
10
-
5
10
-
4
10
-
3
10
-
2
10
-
1
E
b
/N
0
(dB)
Probability of error
Conventional
Decorrelator
SIC
PIC
MMSE
Decision ... IML/FFX P2: IML
MOBK023-05 MOBK023-Buehrer.cls September 28, 2006 15:56
162 CODE DIVISION MULTIPLE ACCESS (CDMA)
0...
Code Division Multiple Access (CDMA) phần 10 pot
... 17: 14
176 CODE DIVISION MULTIPLE ACCESS (CDMA)
[43 ] M. B. Pursley, “The role of spread spectrum in packet radio networks,” Proceedings of
the IEEE, vol. 75, pp. 116–1 34, January 1987.
[44 ] E.S.SousaandJ. ... Technology, vol. 40 , pp. 303–312, May 1991.
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MOBK023-BIB MOBK023-Buehrer.cls September 28, 2006 17: 14
1 74 CODE DIVISI...
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