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3G CDMA - WCDMA and

cdma2000

Rodger E. Ziemer

IEEE Communications SocietyDistinguished Lecturer Program

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amirin king 2

Rules for Efficient Multile !ccess

"hree la#s

$no# the channel

Minimi%e interference to othersMitigate interference recei&ed from others

Re'uirements of #ireless multile access

Channel measurementChannel control and modification

Multile user channel isolation

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amirin king (

)hy CDM!* +igher caacity

Imro&ed erformance in multiath ,y di&ersity

Lo#er mo,ile transmit o#er - longer ,attery life Po#er control

aria,le transmission rate #ith &oice acti&ity detection

!llo#s soft handoff

Sectori%ation gain +igh eak data rates can ,e accommodated

Com,ats other/user interference - lo#er reuse factors

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amirin king 0

)hat is "hird 1eneration* 34 5le6i,le suort of multile ser&ices

oice

Messaging 7 email8 fa68 etc.

Medium/rate multimedia 7 Internet access8 educational

+igh/rate multimedia 7 file transfer8 &ideo

+igh/rate interacti&e multimedia 7 &ideo telecon/ferencing8

telemedicine8 etc.

Mo,ility9 'uasi/stationary to high/seed latforms

1lo,al roaming9 u,i'uitous8 seamless co&erage

E&olution from second generation systems

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amirin king :

)/CDM! ersus cdma2;;; 24Parameter W-CDMA cdma2000

Carrier sacing : M+% (. M+% (.>?>0 M+%

Data modulation @PS$ 5) 7 APS$B R / @PS$

Sreading Comle6 APS$ Comle6 APS$

Po#er control fre'uency 3:;; +% ?;; +%

aria,le data rate imlement. aria,le S5B multicode Reet.8 uncturing8 multicode

5rame duration 3; ms 2; ms also :8 (;8 0;

Coding "ur,o and con&olutional "ur,o and con&olutional

@ase stations synchroni%ed* !synchronous Synchronous

@ase station ac'uisitionFdetect ( steB slot8 frame8 code "ime shifted PG correlation

5or#ard link ilot "DM dedicated ilot CDM common ilot

!ntenna ,eam forming "DM dedicated ilot !u6iliary ilot

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amirin king >

)CDM! Hlink 5rame Structure 34

DPDCHI: data channel

Q: sync & control DPCCH

E>88;C,its23; k == kNdata

chis2:>; =slotT

,itspilot

NPilot: TFCI FBI TPC

TFCI = transmit format combination indicator

FBI = feedback information

TPC = transmit poer control

DPDCH = dedicated physical data channel

DPCCH = dedicated physical control channel

ms>>

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amirin king ; =slotT

TFCI PilotTPC

ms>>

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amirin king 3;

)CDM! Do#nlink Modulator Structure 34

long82c

tJe

longC

longC

p$lse shape

filter %'C(

Primary

ync Code

econdary

ync Code

3G

n

G

P

G

SG

s$

m

38dc

ndc 8

PC

SC

dedicated

traffic channels

primary &

secondary

common pilot

channels

primary &secondary

common

control

channels

other channels

s9p

s9p

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"ransmit Di&ersity Strategy for Do#nlink

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cdma2000 Uplink Frame Structure

C'Cencodertail bits

Con;ol$tionalor T$rbo Coder

symbolrepetition

symbolp$nct$re

blockinterlea;er

mod$lationsymbol

C

channelbits

Bits9

Frame

"8

#!

")

*5!

##

"5")

*!#