Commu.ppt

Embed Size (px)

Citation preview

  • 7/25/2019 Commu.ppt

    1/49

    Cha ter 4Chapter 4 1

  • 7/25/2019 Commu.ppt

    2/49

    p

    ! " #$ %" &'! (%)*%"+ " #, -.) ! " / 01 "" )233!*%01& % ) 5)6&!7 )0!0# +8 &)9 "2-0"8 +8 &)9 " ': )6) 1; 1 "" )233! " %80 % 8"? $7"+8 + 5"? - ;# 2

  • 7/25/2019 Commu.ppt

    3/49

    ( )

    A- @, & :(Modulator)

    #$ !" 7 )1 &@ ? $'! : '!1 6&! 8 7 ? "1 +8 #$ %"(%) "2-0" 8#A&)9 " >9"- 0+ "#$ 8A- @ 6) ?0

    7 )1 &@ 8 0 ;B8?0 )8 5%< 8 = Demodulation 3

  • 7/25/2019 Commu.ppt

    4/49

    - $ +1 ;B8 ?- " '! $)$) . 1 %"(%)2-6)*%"+ "

    1. + "? - ;# (Amplitude Modul AM)2. + "7 >8 (FrequencyModulatio3. + " 3 (P a!e Modulation :PM)

    "

  • 7/25/2019 Commu.ppt

    5/49

    (AM)

    ' "7 )1 &@#$ 87 >8 '! 1 6&! >1

    2 D EM +8 ? ! #$ 877 >8 ' " 7 )1 &@ F 0 8')

    ? - ; # ' " - 8 0)?- "2-' " ! 0

    #

  • 7/25/2019 Commu.ppt

    6/49

    (AM) ()

    '! 80' " ?:: AM 71. ?:) @ ;+@' " AM -.)0%)7 +,6&!8 : )# 0)2. %" ?:: AM ; 5) - "1 1 "" ) %)6& % 6*! 6) %"7 )1

    $

  • 7/25/2019 Commu.ppt

    7/49

    (AM) ()

    A

    %

  • 7/25/2019 Commu.ppt

    8/49

    ( M)

    FM +8 ? ! #$ 8?7 >8 ' " #$2 % 7"+8 - 8 0)?-? - ; # ' " '!

    &

  • 7/25/2019 Commu.ppt

    9/49

    (FM)( ) '! 80' " ?::

    1. ! " ?:) @;+@+8 8') ! " ) " '! 8& 07 >8 2. 7A1 8 % ?:: AM ? % #$G :G! ) %

    '

  • 7/25/2019 Commu.ppt

    10/49

    (FM)( )

    7

    '!

    1

  • 7/25/2019 Commu.ppt

    11/49

    (PM) ?:: PM #$6&!7 9 " :' "-.) A 1& "/ ? $ 7 : 1: #$ -.) 3$"/ #$ 8

    - 8 0)(

    :)

    A3+A7 5"+8 A3 ' " '!%"# A 3' " 7 )1 &@+%: 1&"/ 11

  • 7/25/2019 Commu.ppt

    12/49

  • 7/25/2019 Commu.ppt

    13/49

    ! (PM) ( )

    PM

    13

  • 7/25/2019 Commu.ppt

    14/49

    !!

    " # $%&'& (' ) (

    (

    2 "# $%( "# & )

    1"

  • 7/25/2019 Commu.ppt

    15/49

    "# & ( )

    ' ' ' ' ' ' *+,-*+./012345,AM.

    67892:85;458 ' "7 )1 &@ G9 "+,&)!+8 ), ?::$) . (%) " ) 5)#$7"+8 H $' ") 5) 7%' ":; ' " '!;#; 8 7%-.) 1 ') ' "7 )1 &@#$ "'9 5) %- ;

    ?:: AS8

    2 %2 !:7 ); 0 1 $ 23

  • 7/25/2019 Commu.ppt

    24/49

    #! $ % ! "(ASK)

    7 )1

    '!

    AS8

    2"

  • 7/25/2019 Commu.ppt

    25/49

    #! (FSK)

    ?:: FS8 ') ' "7- 8 0)?- " H $' "' ":; ' " '! ;#; 87%-.' "7 )1 &@#$ " %- ; ? $ :;7 >8 ' "7 )1 &@.#$ , % - ;

    2#

  • 7/25/2019 Commu.ppt

    26/49

    B " (FSK)

    FS8

    2$

  • 7/25/2019 Commu.ppt

    27/49

    B " ! (PSK)

    !! PS8" , %#

    "& # ' # ( ' # ' # (/ # ' # ( ) ,"! 1'+ ' # ( '+ 1 /

    "' # ( &' 1& 0

    2%

  • 7/25/2019 Commu.ppt

    28/49

    B " ! (PSK)

    PS8

    2&

  • 7/25/2019 Commu.ppt

    29/49

  • 7/25/2019 Commu.ppt

    30/49

    3

    Iuadrature JhaKe Lhi t NIuadrature JhaKe Lhi t N

    QIJLNRQIJLNR>?+)'! %S Tit %"'! 2 ! . '9 5) 6*! Khi t Tit UV "/ ?+) SW"/ +, 6&! %"'! '9 5) X -.) X:;Q4 KiPnal eleYentR

    C K ll i Zi P YC K ll i Zi P Y

  • 7/25/2019 Commu.ppt

    31/49

    31

    ConKtellation ZiaPraYConKtellation ZiaPraY

    -.) ;B8?+) ELN [JLN#A6)?() 1? $ $0$&%"##A /)0@"#$?+)7 "aYplitude? $ A JhaKe %"D +80: :? ) \

  • 7/25/2019 Commu.ppt

    32/49

  • 7/25/2019 Commu.ppt

    33/49

    ' " + $ '+"$ 2' # * !4 + (C5D6C C5der9D6Coder)

    4 % $ $%

    33

  • 7/25/2019 Commu.ppt

    34/49

    ' # ( ' " + ! '+ 2 , .#

    % $ $%

    1. ' (Pul! Amplitude Modulation : PAM)

    2. !! (Pul!e Code Mo: PCM)

    3"

  • 7/25/2019 Commu.ppt

    35/49

    0( 5 3 ' 6 ,(Sampling) # '+ " + (

    , , $ '+ 7" " ! $ , , 1 7

    " C D (6AM)

    3#

  • 7/25/2019 Commu.ppt

    36/49

    89:# 3 ' " * ,(! , " + '+ * ,, #

    %3 ' ,( ( $ #( ! # % ( &' " !&' '+" +

    " C D (6AM) ()

    3$

  • 7/25/2019 Commu.ppt

    37/49

    " 3 ' " '+ 4 ( ! " $ # &!!& (Di!crete)

    +( '+ !! " $ PAM $ "(" &! , & ( #(, !

    !! AM

    " C D (PAM) ( )

    3%

  • 7/25/2019 Commu.ppt

    38/49

    " C D (6AM) ()

    3&

  • 7/25/2019 Commu.ppt

    39/49

    %"?:: PCM #$ 8' 5) )6)' " '! -.)?::2 %%) "

    < 7 )2+G@= ( uanti;e)

    &$'' & (PCM)

    3'

  • 7/25/2019 Commu.ppt

    40/49

    %"?:: PCM #$ 8' 5) )6)' " '! -.)?::2 %%) " 8

    < 7 )2+G@= ( uanti;e) ' 5) ) ?:: PCM 8 31. 7 )2+G@

    2. ?G -;" 3. '! &

    &$'' & (PCM)( )

    "

  • 7/25/2019 Commu.ppt

    41/49

    1. * , & 3 " + 4 ( * $ '+ # & 2. * 3 ' ,( # "

    ! , "& PA $ " " % * ;

    DEE &C D (PCM) ( )

    3. " "% &'$ ' ;

    "1

  • 7/25/2019 Commu.ppt

    42/49

    DEE & C D (6FM)( )

    ?@ABC

    , & 3 " + '+

    "2

    $

  • 7/25/2019 Commu.ppt

    43/49

    &$'' & (PCM)( )

    ?@ABC

    ,.# 3 ' , & 3'' '' ' '

    "3

    &C (6 )

  • 7/25/2019 Commu.ppt

    44/49

    ' ' ' '

    DEE &C D (6FM)( )

    * (Code) $ "

    ' '

    ""

  • 7/25/2019 Commu.ppt

    45/49

  • 7/25/2019 Commu.ppt

    46/49

    2. + 3 (Multiple

  • 7/25/2019 Commu.ppt

    47/49

    "%

    ]it rate]it rate? $? $ Taud rateTaud rate]aud rate 7 #,) ) &KOYTol 6)&)9 "&)%0 2 %#,-.) ! "+% Tit rate: "+8 80 Yodulation rate &KiPnalinP rate

    X $ : Tit rate ^ Taud rate#,) ) Tit % eleYent T^loPXM_^Tit rate[Z^Taud rate[T^KiPn

  • 7/25/2019 Commu.ppt

    48/49

    "&

    0%"0%" Taud rateTaud rate SVVV Taud [ IJLN 88 Tit rate

    :& KiPnal eleYent T^loPXMT ^ loPX4 ^ X TitK`S KiPnal _ ^ Z T ^ SVVV X ^ XVVTaud`K

  • 7/25/2019 Commu.ppt

    49/49

    #::+