Wcdma for umts radio access for third genergation mobile communacations phần 5 pdf
Wcdma for umts radio access for third genergation mobile communacations phần 5 pdf
... hand, WCDMA requires very linear base station power
amplifiers, which is challenging for the implementation.
154
156
158
160
162
164
166
168
170
100 150 200 250 300 350 400 450 50 0 55 0 600 650 700 ... capacity
7. 95 92.7 80.9 Erl 87 % 84.2 Erl 4 %
12.2 60 .5 50.1 Erl 83 % 52 .8 Erl 5 %
16 39.0 30.1 Erl 77 % 32.3 Erl 7 %
32 19.7 12.9 Erl 65 % 14.4 Erl 12 %
64 12 .5 7.0 Erl...
Wcdma for umts radio access for third genergation mobile communacations phần 2 pdf
... of the WCDMA waveform against interference is clearly
compromised. The performance of high bit rates with WCDMA is presented in Section 12.4.
Both base stations as well as mobiles for WCDMA use ... selecting WCDMA as the
standard for the UTRA (UMTS Terrestrial Radio Access) air interface on the paired
frequency bands, i.e. for FDD (Frequency Division Duplexing) operation, an...
Wcdma for umts radio access for third genergation mobile communacations phần 10 ppsx
... 31 % 2.3 dB 2.1 dB
Case 3 v ¼ 120 km/h 1 35 % 35 % 2 .5 dB 2.2 dB
2 36 % 36 % 2 .5 dB 2.1 dB
4 30 % 30 % 2.3 dB 1.9 dB
0 5 10 15 20 25 30 35
5
0
5
10
15
20
1 ant
2 ant
4 ant
Required
E
b
/
N
0
... addressed in [5] .
Reverse pilot channel
Enhanced
access header
Enhanced
access data
Enhanced access channel probe
5 ms
N
times 5, 10 or 20 ms
Figure 14.7. MC mode RACH ram...
Wcdma for umts radio access for third genergation mobile communacations phần 3 doc
... (MGW). One MSC/GMCS
Figure 5. 12. Release ’99 UMTS core network structure
96 WCDMA for UMTS
5. 3.3 Vertical Planes
5. 3.3.1 Control Plane
The Control Plane is used for all UMTS- specific control signalling. ... System (UMTS) , Requirements for the UMTS Terrestrial
Radio Access System (UTRA), ETSI Technical Report, UMTS 21.01 version 3.0.1, November
1997.
[6] Universal...
Wcdma for umts radio access for third genergation mobile communacations phần 4 potx
... with
1
2
-rate
coding (approx.)
51 2 7 .5 15 3–6 1–3 kbps
256 15 30 12–24 6–12 kbps
128 30 60 42 51 20–24 kbps
64 60 120 90 45 kbps
32 120 240 210 1 05 kbps
16 240 480 432 2 15 kbps
8 480 960 912 456 kbps
4 960 1920 ... (approx.)
256 15 7 .5 kbps
128 30 15 kbps
64 60 30 kbps
32 120 60 kbps
16 240 120 kbps
8 480 240 kbps
4 960 480 kbps
4, with 6 parallel codes 57 40 2.8 Mbps
116...
Wcdma for umts radio access for third genergation mobile communacations phần 6 doc
... or
minimum value.
01234
10
15
20
25
dB
0 0 .5
1 1 .5
2 .52 3 3 .5
0 .5 1 .5 2 .5 3 .5
4
−10
0
10
20
dBm
0 0 .5 1 1 .5 2 2 .5 3 3 .5 4
−0 .5
0
0 .5
1
1 .5
0 0 .5 1 1 .5 2 2 .5 3 3 .5 4
5
10
15
dB
Seconds
E
b
/N
0
target
increases ... since the fast
power control cannot compensate for the fading.
0 0 .5 1 1 .5 2 2 .5 3 3 .5 4
0 0 .5 1 1 .5 2 2 .5 3 3 .5 4
−1...
Wcdma for umts radio access for third genergation mobile communacations phần 7 pps
... is
presented.
264 WCDMA for UMTS
10 .5 Packet Data System Performance
In this section, packet scheduling performance is analysed. First, link level performance of
packet data is discussed in Section 10 .5. 1, ... connections. HSDPA brings a further 30–40 % reduction
0
5
10
15
20
25
30
35
40
GPRS 3+2 EDGE 2+1 WCDMA
128 kbps
WCDMA
384 kbps
Seconds
Yahoo 85 kB
Nokia 190 kB
6...
Wcdma for umts radio access for third genergation mobile communacations phần 8 potx
... total
Uplink bit rate
0
50
100
150
200
250
300
350
400
0123 456 78
Link budget improvements [dB]
kbps
Average non-real time
Guaranteed 95% real time
Reference case
with 64 kbps 95%
probability
Reference ... of HSDPA techniques for the uplink direction is under investigation in
3GPP for inclusion in forthcoming Releases, though the expected gain is not foreseen to
344 WCDMA f...
Wcdma for umts radio access for third genergation mobile communacations phần 9 potx
... km/h 5. 0 dB 5. 9 dB 3 .5 dB 3 .5 dB
120 km/h 4.0 dB 4.4 dB 3.0 dB 3.4 dB
356 WCDMA for UMTS
The choice of multiuser detection techniques for WCDMA base station receivers has been
studied [55 58 ]. ... in
−24
−22
−20
−18
−16
−14
−12
−10
−8
I
c
/
l
or
[dB]
−10 50 51 0 152 0 25
G
=
I
or
/
N
0
(dB)
3 km/h
50 km/h
120 km/h
Figure 12.16. Effect of mobile speed in the ITU Pe...
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