001 CBB_C01_E2 CDMA Technology Overview-21

8/3/2019 001 CBB_C01_E2 CDMA Technology Overview-21

http://slidepdf.com/reader/full/001-cbbc01e2-cdma-technology-overview-21 1/21

CDMA OverviewCBB_C01_E2

ZTE Universit

CDMA-BSS Team



CDMA evolution path The advantage of CDMA

Role of ZTE in CDMA



Evo lu t i on o f Mob i le Com m un ica t ions Sys t em

11GG 22GG 33GG

Analog

cellularDDiiggiittaall cceelllluullaarr DDiiggiittaall cceelllluullaarr

VVooiiccee VVooiiccee / / ddaattaa VVooiiccee / / hhiigghh ssppeeeedd ddaattaa

AAMMPPSS CCDDMMAA 11XXRRtttt CCDDMMAA22000000

TTAACCSS GGSSMM GGPPRRSS WW__CCDDMMAA

8800’’ 11999922 11999999 22000011 22000033

AMPS: Advanced Mobile Phone System

TACS: Total Access Communication System

AMPS: Advanced Mobile Phone System

TACS: Total Access Communication System

GPRS: General Packet Radio Services

GPRS: General Packet Radio Services



2G 2.5G 3G

cdmaOne- -

CDMA2000 CDMA2000-

CDMA2000-

cdmaOne- -

cdmaOne- -

CDMA2000CDMA2000 CDMA2000-

CDMA2000 CDMA2000-

CDMA2000

FL 3.09Mbps PDRL 1.8 Mbps PD

Voice•

•

• High Capacity Voice• 153 kbps PD

• RF BackwardComp.

CDMA20001X Rel A

• 2.4 Mbps PDRF Backward Comp.IS-95-BKoreaJapan

••

• Backward Comp.

CDMA2000

••

14.4 kbps CSD

•

•

•

•

•

•

.

CDMA20001X Rel A

CDMA20001XRel.A

••

.

IS-95-BKoreaJapan

IS-95-BKoreaJapan

•

•

•

•

.

CDMA2000

•

• 64 kbps Packet• RF Backward

Compatible

• FL 3.09 Mbps PD

• RL 1.8 Mbps PD

•

Backward Comp.

e• 307.2 kbps Packet

• Backward Comp.•

•

•

••

•

•

1x e

•

•

•

HIRS: High-speed interconnect Router Subsystem





large coverage

almost 2 times than GSM, save money for operator

Example:cover 1000 km2： GSM need，，

Attention: exact result need“Link Budget ”



High spectrum capacity，8--10 times than AMPS,4—6High spectrum capacity，8--10 times than AMPS,4—6

times than GSMtimes than GSM

Power---

frequency

TACS、AMPS

TDMATDMA---Different user use different

GSM、DAMPS

CDMACDMA---Different user use same

frequency at the same time,but withPowererent sprea ng co e



High privacy, hard to wiretapping

Spread signal

Each user is below

the noise deeply

Informationsignal

Demodulatedsignal

TX RX

Spread code Spread code



Use soft handoff decrease dro -call rate

• CDMA：”make before break”---soft handoff• Other s stems: “make after break”---hard handoff



oo vo ce qua y, use , ,

13K QCELP voice coding—the best coding method in the world.

Voice quality

64k 13k 8k QCELP 13k 8kEVRC4k

PCM GSM

8k QCELP

CDMA

QCELP

CDMA

8kEVRC

CDMA

QCELP: QualComm Code Excited Linear Predictive CodingEVRC: Enhanced variable Rate Coding



Perfect Power Control and voice activation make the MS

Power low, healthy for body—green mobile phone.

Mean Power Max

PowerGSM: 125mW 2W

CDMA: 2mW 200mW



CDMA 8 0 0 MHz Cel lu lar Sp ect r u m Usage

ChannelNumbers 9

9 1

1 0 2 3

1

3

3 3

3

3 4

6

6 6

6

6 7

7

1 6

7

1 7

7

9 9

9

9 1

1 0 2 3

1

3

3 3

3

3 4

6

6 6

6

6 7

7

1 6

7

1 7

7

9 9

Forward link (i.e., cell site transmits)Reverse link (i.e., mobile transmits)824 849 869 894

uses

1 10 10 1.5 2.5 1 10 10 1.5 2.5

Possible CDMACenter Freq. Assignments

~300 kHz. “guard bands” possibly required if adjacent-frequency signals are non-CDMA (AMPS, TDMA, ESMR, etc.)

All CDMA RF carriers are 1.25 MHz. Wide

Between CDMA carriers, no guard band



CDMA Fr equ en cy Ch an n el

ss g n m en t a t z e u ar 1

3 3 4

6 6 7

9 9 1

1 0 2 3

3 3 3

6 6 6

7 1 5

7 9 9

7 1 6

ChannelNumbers

an an

1019 37 78 119 160 201 242 283 384 425 466 507 548 589 630 691 777

8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 9 9 8

736

CDMA A-Band Carriers CDMA B-Band Carriers * Requires frequency coordination withnon-cellular interferers

** Requires frequency coordination with

A-band carrier

A Band Primary Channel 283A Band Secondary Channel 691

B Band Primary Channel 384B Band Secondary Channel 777

everse n : . z+ . z

forward link: 870.00MHz+0.03MHz*N

*

Channel number?hannel number?

Center

frequency

Center

frequency . .

Forward link: 870.00MHz+0.03MHz*(N-1023)



CDMA Fr eq u en cy Ch an n el

Forward LinkForward Link

Assign m ent a t 4 5 0 MHz Ce l lu la r



CDMA Fr eq u en cy Ch an n el

Assign m ent a t 4 5 0 MHz Ce l lu la r

Reverse

Link

Reverse

Link

Forward

Link

Forward

Link



CDMA PCS 1 9 0 0 MHz S ect r u m Usa e

Guard Bands Paired Bands

Licensed Licensed

Unlicensed

ChannelNumbers

2 9

3 0

4 0

6 9

7 0

8 0

9 0

1 1 9

2 9

3 0

4 0

6 9

7 0

8 0

9 0

1 1 9

B

T

A

B

T

A

B

T

A

B

T

A

B

T

A

B

T

A

MTA BTAMTAMTA MTAMTAData Voice

0 0

A D B E F C A D B E F C

15 51010 1515151515 555 55

Forward link (i.e., cell site transmits)Reverse link (i.e., mobile transmits)1850MHz

1910MHz

1930MHz

1990MHz

Up link : 1850.00MHz+0.05MHz*N

Down link : 1930.00MHz+0.05MHz*N

Center

Frequency

Center

Frequency



’

In 1995, CDMA mobile telecommunication project was started

In November, 1999, ZTE signed the “Agreement on CDMA R&D” with

In 1995, CDMA mobile telecommunication project was started

In November, 1999, ZTE signed the “Agreement on CDMA R&D” withua comm

In August, 2000, the first field trial was set up.

In September, 2000， ZTE presented the first CDMA handset with UIM in

ua comm

In August, 2000, the first field trial was set up.

In September, 2000， ZTE presented the first CDMA handset with UIM in

the world. In January, 2001, the first cdma2000-1x call was passed through in lab

-

the world. In January, 2001, the first cdma2000-1x call was passed through in lab

-, ,voice, data & image.The data rate reach up to 153.6Kbps.

In 2003, ZTE first EV-DO all-IP trial network was set up.

, ,voice, data & image.The data rate reach up to 153.6Kbps.

In 2003, ZTE first EV-DO all-IP trial network was set up.



－

PSTN/PLMN

BTS（IS-95）

Abis

E1

MSC/VLR HLR/AUC

BSC（IS-95）IS95

AbisIP

UmHA

WINBTS（IS-95）

2G/3G

Terminals

Internet

Router Router

IS2000E1

STM-1

Ethernet

OMC

BTS（

1X）

E1

AbisIP

E1

STM-1

PDSN/FABSC/ PCF (1X)

Ethernet

AAABTS（1X） Server



Network Simulation

B

H

LH

B

B

G

F

B

H

GB

A

H

B

F

F

H

FB

F

Û ê ± ³ Â ·

³ ¤ ½ - Æ Ò Â ·

´ ó ¿ µ ± ± Â · ´ó¿µÂ·´ó¿µÄÏÂ·

´ ó Í ò Â

·

¹ ã ´ ï Â ·

Â ·

º ì Ã Þ ¶ þ Â

·

» · ³ Ç ±

± Â ·

½ ð Ô ́ Â ·

Á ¬ Ð Ä Â ·

Á ú

Ã ¯ Ê ¢ Â ·

Ä Ï Í ¨ µ

À

Ð Ë Í ú Â ·

Ð Â Ô ° Â ·

¹ « Ô °

Wireless Network

Optimization

B A

H

B

F

B

F

K

° ² » ª Â ·

° ² Á ¼ Â ·

¸£ ¿Ó Â · º á

¿ Ó Â ·

» · º Í Â ·

·

Á ù º Í Â ·

ú · É Â ·

Å £

Ê ¼

Æ Ò Â ·

Ê µ Ò µ Â ·

Â ·

Network Planning

Network Optimization Simulation

Maintenance Optimization





Date post:	06-Apr-2018
Category:	Documents
Upload:	si-moetz-nugroho
View:	217 times
Download:	0 times

001 CBB_C01_E2 CDMA Technology Overview-21

Documents