3rd Generation of Mobile Communications

Advanced Info Service PLC.

1 | P a g e Basic -series Composed by: W.R Radio Access BKK Edit by: Bunjong Yosapa

ISSUE 1-2

(Code)

Wideband Code Division Multiple Access

Wideband Code Division Multiple Access

(WCDMA) UMTS NTT

DoCoMo

1 128 128 code

DS-CDMA (Direct-sequence spread spectrum)

Frequency Division Duplexing (FDD)

GSM

3rd Generation of Mobile Communications

Advanced Info Service PLC.

2 | P a g e Basic -series Composed by: W.R Radio Access BKK Edit by: Bunjong Yosapa

Wideband

CDMA 2 1.25MHz WCDMA 5 MHz

Direct-sequence spread spectrum

1

1

1 Input data spread Spreading code

Output Sequence

3rd Generation of Mobile Communications

Advanced Info Service PLC.

3 | P a g e Basic -series Composed by: W.R Radio Access BKK Edit by: Bunjong Yosapa

WCDMA code spread 3.84 Mcps (Mega chip per second)

(chip)

Spreading

Despread

Power

Freq.

Power

Freq.fNarrow bandwidth Wide bandwidth

Spreading

2 Spread

2 ()

()

3rd Generation of Mobile Communications

Advanced Info Service PLC.

4 | P a g e Basic -series Composed by: W.R Radio Access BKK Edit by: Bunjong Yosapa

Power

Freq.

Wide bandwidthf

Despreading

Power

Freq.

Narrow bandwidth

Noise

NoiseSignal

Signal

3 Despread

3

() fading despread ( spreading)

spreading

(

)

5

3 1 1

1 5

3rd Generation of Mobile Communications

Advanced Info Service PLC.

5 | P a g e Basic -series Composed by: W.R Radio Access BKK Edit by: Bunjong Yosapa

C1

C2

Cn

+

User 1

User 2

User n

4 Code (C1 Cn)

4 spreading code

code

Code Division Multiple Access (CDMA)

3rd Generation of Mobile Communications

Advanced Info Service PLC.

6 | P a g e Basic -series Composed by: W.R Radio Access BKK Edit by: Bunjong Yosapa

FDD Technical summary Frequency band: 1

Minimum frequency band required: ~ 2x5MHz

Frequency re-use: 1

Carrier Spacing: 4.4MHz - 5.2 MHz

Maximum number of (voice) channels on 2x5MHz: ~196 (spreading factor 256 UL, AMR 7.95kbps) / ~98

(spreading factor 128 UL, AMR 12.2kbps)

Voice coding: AMR codecs (4.75 kHz - 12.2 kHz, GSM EFR=12.2 kHz) and SID (1.8 kHz)

Channel coding: Convolutional coding, Turbo code for high rate data

Duplexer needed (190MHz separation), Asymmetric connection supported

Tx/Rx isolation: MS: 55dB, BS: 80dB

Receiver: Rake

Receiver sensitivity: Node B: -121dBm, Mobile -117dBm at BER of 10-3

Data type: Packet and circuit switch

Modulation: QPSK

Pulse shaping: Root raised cosine, roll-off = 0.22

Chip rate: 3.84 Mcps

Channel raster: 200 kHz

Maximum user data rate (Physical channel): ~ 2.3Mbps (spreading factor 4, parallel codes (3 DL / 6 UL),

1/2 rate coding), but interference limited.

Maximum user data rate (Offered): 384 kbps (year 2002), higher rates ( ~ 2 Mbps) in the near future.

3rd Generation of Mobile Communications

Advanced Info Service PLC.

7 | P a g e Basic -series Composed by: W.R Radio Access BKK Edit by: Bunjong Yosapa

HSPDA will offer data speeds up to 8-10 Mbps (and 20 Mbps for MIMO systems)

Channel bit rate: 5.76Mbps

Frame length: 10ms (38400 chips)

Number of slots / frame: 15

Number of chips / slot: 2560 chips

Handovers: Soft, Softer, (interfrequency: Hard)

Power control period: Time slot = 1500 Hz rate

Power control step size: 0.5, 1, 1.5 and 2 dB (Variable)

Power control range: UL 80dB, DL 30dB

Mobile peak power: Power class 1: +33 dBm (+1dB/-3dB) = 2W; class 2 +27 dBm, class 3 +24 dBm, class 4

+21 dBm

Number of unique base station identification codes: 512 / frequency

Physical layer spreading factors: 4 ... 256 UL, 4 ... 512 DL

3rd Generation of Mobile Communications

Advanced Info Service PLC.

8 | P a g e Basic -series Composed by: W.R Radio Access BKK Edit by: Bunjong Yosapa

Operating Band Frequency Band UL Frequencies UE transmit (MHz) DL Frequencies UE receive (MHz)

I 2100 1920 - 1980 2110 - 2170

II 1900 1850 - 1910 1930 - 1990

III 1800 1710 - 1785 1805 - 1880

IV 1700 1710 - 1755 2110 - 2155

V 850 824 - 849 869 - 894

VI 800 830 - 840 875 - 885

VII 2600 2500 - 2570 2620 - 2690

VIII 900 890 - 915 935 - 960

IX 1800 1749.9 - 1784.9 1844.9 - 1879.9

X 1700 1710 - 1770 2110 - 2170

XI 1500 1427.9 - 1452.9 1475.9 - 1500.9

XII 700 698 - 716 728 - 746

XIII 700 777 - 787 746 - 756

XIV 700 788 - 798 758 - 768

1 WCDMA (http://en.wikipedia.org/wiki/UMTS_frequency_bands)

3rd Generation of Mobile Communications

Advanced Info Service PLC.

9 | P a g e Basic -series Composed by: W.R Radio Access BKK Edit by: Bunjong Yosapa

http://www.umtsworld.com/technology/wcdma.htm

http://en.wikipedia.org/wiki/UMTS_frequency_bands

3GPP TS 25.101