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...

Ngày tải lên: 14/08/2014, 12:21

... 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...

Ngày tải lên: 14/08/2014, 12:21

... 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...

Ngày tải lên: 14/08/2014, 12:21

... (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...

Ngày tải lên: 14/08/2014, 12:21

... 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...

Ngày tải lên: 14/08/2014, 12:21

... 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...

Ngày tải lên: 14/08/2014, 12:21

... 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...

Ngày tải lên: 14/08/2014, 12:21

... 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...

Ngày tải lên: 14/08/2014, 12:21

... 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...

Ngày tải lên: 14/08/2014, 12:21