CDMA: Access and Switching P8 pot
CDMA: Access and Switching P8 pot
... (B) Rayleigh fading and for one and six users.
J =7,J
max
= 50, P =1,N = 31, L = 1. Filter length = 31 for both schemes.
202 CDMA: ACCESS AND SWITCHING
of users K
u
=1, 6, and the processing gain ... DPSK.
Figures 8.4-A and -B show that oversampling is very important for the SAD scheme.
The optimum J was obtained previously, and it should be followed. It also shows that
208...
CDMA: Access and Switching P1 potx
... Division Multiple Access (G-TDMA).
2 CDMA: ACCESS AND SWITCHING
cancellation techniques known as multiuser detectors (see Chapter 10). Such techniques
are implemented at the receiver and they attempt ... factor.
In order to enhance capacity, PO-CDMA sytems utilize multiple access interference
CDMA: Access and Switching: For Terrestrial and Satellite Networks
Diakoumis G...
CDMA: Access and Switching P5 pot
... L
c
= 32, L =32
and B
p
= 10. We observe that packet traffic can be routed through the switch even
128 CDMA: ACCESS AND SWITCHING
[4] C. Rose and M.G. Hluchyj ‘The performance of random and optimal
scheduling ... module (and thus one
pair of frequency bands) of size N × N for switching traffic between N uplink and
N downlink beams. Each beam has a capacity of L traffic channels i...
CDMA: Access and Switching P9 pot
... 0-470-84169-9 (Electronic)
212 CDMA: ACCESS AND SWITCHING
lose their compactness in spectrum which leads to out-band spectral regrowth (see
references [1] and [2]). A band-pass filter then has to ... θ
(k
3
)
=
K
k=2
1
2
C(I
1
,Q
k
)
2
d
2
I
b
(k)
Q
[0]
2
+
1
2
C(I
1
,Q
k
)
2
d
2
Q
b
(k)
Q
[0]
2
+
232 CDMA: ACCESS AND SWITCHING
Following the same method, all the α
2
3
t...
cdma access and switching for terrestrial and satellite networks
... 257
10.4Conclusions 266
References 267
Index 269
40 CDMA: ACCESS AND SWITCHING
Figure 2.4 Fourier, Hadamard and Karhunen–Loeve orthogonal codes of size-16.
22 CDMA: ACCESS AND SWITCHING
a
i1
a
i2
a
i3
a
i4
a
i1
a
i2
a
i3
a
i4
T
d
T
a
d
i
=1
d
i
= ... 1.3 The Spreading Process in Orthogonal CDMA.
28 CDMA: ACCESS AND SWITCHING
References
[1] D. Gerakoulis ‘G -CDMA: a...
CDMA: Access and Switching P3 doc
... Control Unit (CCU). The
72 CDMA: ACCESS AND SWITCHING
To RF
~
π/2
cos(2
π
f
0
t)
sin(2
π
f
0
t)
Σ
D/A
and
Filtering
FIR
FIR
D/A
and
Filtering
Figure 3.11 The baseband quadradure modulator.
by ... R
s
.
62 CDMA: ACCESS AND SWITCHING
# 1 # 2 # 3 # 43 # 44# 42
10 MHz band
For Traffic Channels only
Access
Channel
only
Each Uplink Beam - i
i = 1, , 32
# 1 # 2 # 3 # 43 # 44# 4...
CDMA: Access and Switching P4 ppsx
... (Electronic)
90 CDMA: ACCESS AND SWITCHING
RF/BB: RF to Baseband converter
BR&OS: Beam Recovery and Overspreading
CDB: Code Division Bus
TCR&RS: Traffic Channel Recovery and Respreading
UP ... frequency bands. The
satellite system operates over S uplink and S downlink frequency bands of bandwidth
W ≈ 10 MHz each (S=40 at Ka band). Hence, there are S switching modules,...
CDMA: Access and Switching P6 ppt
... signal phases Φ
i
are then mapped into the inphase and quadrature
components (a, b), Φ
i
→ (a, b).
CDMA: Access and Switching: For Terrestrial and Satellite Networks
Diakoumis Gerakoulis, Evaggelos ... f
1
.
138 CDMA: ACCESS AND SWITCHING
for SO/SE-CDMA and
C
k,i
=
1
L
u
L
b
L
u
−1
l=0
w
(k)
[l]w
(i)
[l]c
(b
k
)
[l]c
(b
i
)
[l]
(l+1)L
b
−1
m=lL
b
w
(b
k
)
[m]w
(b
i
)...
CDMA: Access and Switching P7 pps
... acknowledged. The
Access Channel Receiver Unit (ACRU), shown in Figure 7.2-A, consists of a non-
170 CDMA: ACCESS AND SWITCHING
ACTU: Access Channel Transmitter Unit
S&PRU: SYNC and Paging Receiver ... J. D. Powell and M. L. Workman Digital Control of Dynamic
Systems, 2nd Ed. Addison-Wesley, Massachusetts, 1990.
164 CDMA: ACCESS AND SWITCHING
channels are, the Pilo...
CDMA: Access and Switching P10 pps
... to that proposed
240 CDMA: ACCESS AND SWITCHING
include centralized [2] and distributed [3], [4], power control methods. The distributed
algorithms are simpler to implement and will be the focus ... a single user detection case.
268 CDMA: ACCESS AND SWITCHING
[18] M. K. Varanasi and B. Aazhang ‘Multistage detection in asynchronous
code-division multiple -access communic...
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