01- Owa200002 Wcdma Ran Basic Principle Issue1.0

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    HUAWEI TECHNOLOGIES CO., LTD.

    All rights reserved

    www.huawei.c!

    Internal

    OWA200002

    WCDMA RAN Basic

    Principle

    ISSUE1.0

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    HUAWEI TECHNOLOGIES CO., LTD. "age #All rights reserved

    Chapter 1 CDMA FundamentalCha

    pter 1 CDMA Fundamental

    Chapter 2 Performance Enhancement MethodsChapter 2 Performance Enhancement Methods

    Chapter 3 CDMA FDD ModeChapter 3 CDMA FDD Mode

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    Chapter 1 CDMA FundamentalCha

    pter 1 CDMA Fundamental

    1.1 Mult!ple Access "echnolo#$ and Duple% "echnolo#$1.1 Mul

    t!ple Access "echnolo#$ and Duple% "echnolo#$

    1.2 CDMA Pr!nc!ple and &A'E "echnolo#$1.2 CDMA Pr!nc!ple and &A'E "echnolo#$

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    Multiple Access Technology and Duplex Technology

    Multiple access technology

    Tie di!ision ultiple access "TDMA#

    $re%uency di!ision ultiple access "$DMA#

    Code di!ision ultiple access "CDMA#

    Duplex technology

    Tie di!ision duplex "TDD#

    $re%uency di!ision duplex "$DD#

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    "raff!c channels( d!fferentusers are ass!#ned un!)ue

    code and transm!tted o*er

    the same fre)uenc$ +and,

    for e%ample, CDMA and

    CDMA2000

    "raff!c channels( d!fferent fre)uenc$ +ands

    are allocated to d!fferent users,for e%ample,

    AMPS and "ACS

    "raff!cchannels( d!fferent t!me slots

    are allocated to d!fferent users, for

    e%ample, DAMPS and -SM

    Fre)u

    enc$

    "!me

    Poer

    Fre)u

    enc$

    "!me

    Poer

    Fre)u

    enc$

    "!me

    Poer

    FDMA

    "DMA

    CDMA

    User

    User

    User

    User

    User

    User

    Multiple Access Technology

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    Characteristics o& CDMA 'yste

    (igh 'pectral )&&iciency

    $re%uency ultiplex coe&&icient is *+

    so&t capacity

    ,uality

    Co!erage

    -nter&erence

    'el&.inter&erence syste

    A /) transission poer is inter&erence &or another /)+

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    Chapter 1 CDMA FundamentalChapter 1 CDMA Fundamental

    1.1 Mult!ple Access "echnolo#$ and Duple% "echnolo#$1.1 Mult!ple Access "echnolo#$ and Duple% "echnolo#$

    1.2 CDMA Pr!nc!ple and &A'E "echnolo#$1.2 CDMA Pr!nc!ple and &A'E "echnolo#$

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    correlation

    Correlation is a easure o& siilarity o& 1eteen any to ar1itrary signals+

    )AMP3)4

    -1 1 /1 1

    1 1 1 1/1 1 /1 1

    ero correlat!on

    rtho#onal s!#nals

    /1 1 /1 1

    /1 1 /1 1

    1 1 1 1

    1 correlat!on

    Ident!cal s!#nals

    1

    0

    /1

    10

    /1

    1

    0

    /1

    1

    0

    /1

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    'preading

    Despreading

    Chip

    'y1ol

    Data

    'preading code

    'preading signal

    5Data6code

    Data

    5'preading6code

    *

    .*

    *

    .*

    *

    .*

    *.*

    *

    .*

    'preading code

    'preading and Despreading

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    'pectru Analysis o& 'preading 7 Despreading

    Spread!n# code

    Spread!n# code

    S!#nal

    Com+!nat!on

    arro+and s!#nal

    f

    P4f5

    6road+and s!#nal

    P4f5

    f

    o!se

    P4f5

    f

    o!se6road+and s!#nal

    P4f5

    f

    &eco*ered s!#nal

    P4f5

    f

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    Source

    cod!n#Channelcod!n#

    Spread!n# Modulat!on

    Source

    decod!n#Channel

    decod!n#Despread!n# Demodulat!on

    &ad!o channel&ad!o channel

    Processing Procedure o& CDMA 'yste

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    Multi.path )n!ironent

    "!me

    &ece!*ed

    s!#nal

    "ransm!tted

    s!#nal

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    Principle o& RA8) Recei!er

    &ece!*e set

    Correlator 1

    Correlator 2

    Correlator 3

    Searcher

    correlator

    Calculate the

    t!me dela$ and

    s!#nal stren#th

    Com+!ner"he

    com+!ned

    s!#nal

    tt

    s4t5 s4t5

    &A'E rece!*er help to o*ercome on the mult!/path fad!n# and enhance the rece!*e

    performance of the s$stem

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    'tructure o& RA8) Recei!er

    7 8

    7 I

    Com+!ner

    I

    Matched

    F!lter

    Phase

    &otator

    Channel

    est!mator

    Dela$

    E)ual!9er

    I

    8

    Path 1

    Path 2

    Path 3

    Input s!#nal

    Correlator

    Code

    #enerators 8

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    Ad!antages o& CDMA

    RA8) recei!er is adopted The tie di!ersity e&&ect generated 1y channel

    coherence tie is e&&iciently used+

    &re%uency di!ersity

    Wide1and &re%uency spectru

    (igher inter&erence tolerance and security per&orance 3o signal transission poer

    9reat &lexi1ility in carrying ultiple ser!ices ith largelydi&&erent 1it rate and ,o' re%uireent+

    Di&&erent spreading &actors &or di&&erent ser!ices ith

    di&&erent data rates (igh spectral e&&iciency

    All users can share the sae &re%uency spectrusiultaneously+

    'upporting so&t hando!er and so&ter hando!er+

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    Chapter 1 CDMA FundamentalChapter 1 CDMA Fundamental

    Chapter 2 Performance Enhancement MethodsChapter 2 Performance Enhancement Methods

    Chapter 3 CDMA FDD ModeChapter 3 CDMA FDD Mode

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    ('DPA 8ey Techni%ues . O!er!ie

    AMC Fast Schedul!n#:A&8 :$+r!d A&8

    1;8AMSF1;, 2ms and CDM

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    AMC 4Adapt!*e Modulat!on = Cod!n#5 +ased on Channel 8ual!t$ Feed+ac>

    Ad:ust data rate to copensate channel conditions

    ; 9ood channel condition < (igher rate

    ; Bad channel condition < 3oer rate

    Ad:ust the coding rate to copensate channel conditions

    ; 9ood channel condition ?

    ; Bad channel condition =

    Ad:ust the odulation schee to copensate channel conditions

    ; 9ood channel condition

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    ('DPA 8ey Techni%ues . (AR,

    Con*ent!onal A&8

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    ('DPA 8ey Techni%ues . $ast scheduling

    Scheduler ma$ +e +ased on

    CDM TDM Channel condition

    Aount o& data aiting in the %ueue "delay#

    $airness "satis&ied users#

    Cell throughput etc

    Scheduler ma$ +e +ased on

    CDM TDM Channel condition

    Aount o& data aiting in the %ueue "delay#

    $airness "satis&ied users#

    Cell throughput etc

    'cheduling

    deterines

    hich user

    shall 1e

    transitted+

    'cheduling

    deterines

    hich user

    shall 1e

    transitted+

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    ('DPA 8ey Techni%ues < CDM and TDM

    Channel!9at!on codes allocated

    for :S/DSC: transm!ss!on

    ? codes 4e%ample5SF@1;

    SF@?

    SF@

    SF@2

    SF@1

    User B1 User B2 User B3 User B

    ""I

    Shared

    channel!9at!on

    codes

    10 ms

    20 ms

    0 ms

    ?0 ms

    Earlier releases

    2 ms

    Rel 5 (HS-DSCH)

    Esu1.&raesF "2G@0 chips#

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