2018
SAI VIDYA INSTITUTE OF TECHNOLOGY
Venkatesha M, Department of ECE
.IN
PRINCIPLES OF
COMMUNICATION SYSTEMS
C
N
(15EC45)
SY
IV SEMESTER ECE
MODULE 1 SYLLABUS
U
AMPLITUDE MODULATION:
Introduction, Amplitude Modulation: Time & Frequency – Domain description, Switching
VT
modulator, Envelop detector
(Page No. 1 -23)
DOUBLE SIDE BAND-SUPPRESSED CARRIER MODULATION:
Time and Frequency – Domain description, Ring modulator, Coherent detection, Costas Receiver,
Quadrature Carrier Multiplexing (QAM). (Page No. 24 -37)
SINGLE SIDE–BAND AND VESTIGIAL SIDEBAND METHODS OF
MODULATION:
SSB Modulation, VSB Modulation, Frequency Translation, Frequency- Division Multiplexing,
Theme Example: VSB Transmission of Analog and Digital Television
(Page No. 38 -50)
Studied smart, not hard — thanks to VTUSync.in
,MODULE -1 AMPLI TUDE MODULATION
TNTKODUC TION :_
Messctfle signc ls o?te ?n cornrpa*rb-le for d i recf -*rorv6 nnjs sion . For
* "rg'r.t, _h :trove) )onXet_dixFqnce^, f I Sftengh f,,ox b
::
tmc^reased by
be
^odula*fo7 Nifb a l-,igr. frena<nca cerrier krqVe.
o l*erfin7 qnt6 eae pororrel.er (o^
er 5i?nql, in accorJqnc" hJ?th '1ine
rn€ssqfle srSnal bil keepg_u_r7 CrlBer
fenF .
1, shoru s tt-te general Sche.mrqlic
F-r7uae
TrepTsaerdofion g .^odulq+ion
.IN
Process" r* covxlai
t s-fupea ,3 6iTnoLs qa follorux,
Modutq*or
signa
C n4odLllqled
I siSnaI
N
SY
N P'J€,TI:
ru hfch Con{,ai rg A nnesse fl€
U
ft beJnqnxnni*"d, is cqlled @8 nnesso?e 5i7nal. T+ is crlao
VT
Knorrn qx'
?Wf;bgpd Sixrnlr ruhi4t'., hqa b' ladengo tae process
* nnodura$,'on,
{ence Tt Ts el80 ne,ned (x ,'I$5!gE1in7 g!',i
lrla#',enna ffl c q tr y
, ?t T.s &rtted bg nn tt) .
9U. rnct) = A. cosanf-1
ruhere, A-= Annpti*tld. *F nneseq?e gignaf ln Voto.
fo,, = freclruen !g 4 nnessqgR STgnal , .f 4 Hs.
*t Jn f vuq,ru€o gg J oitt lhe .8pecln-rro + nn c b) lr Aenot tr
"rn
U14 M (F), lhe .8 Fecttu'rr Ia bq",J l; rnited b & r,..t uz .
Mtf) ..Nhert
' M(o) + M(f)
= Annplifude
feguo,lrg frrepen%E}
Studied smart, not hard — thanks to VTUSync.in
nl(qlexha. M, JRtr & AolTrlor.t Fol(u lhJ, DePt eP EcS
,{, Cq-miet
A-.l'z\- -/ /r\1il4 i. f}, is a_ high fre_q,uenu/ aignd, r-xed h-
c qr ?F$ bte sl1nd -E J,he Te ce? ver cf {er nn odu l"}ion . '
MqttFnnq.licol! it iS dey,oted by c C+) .
Er "" c c+)
= A. cos@n+& + 4" ), i B E-pqrqnneterx ere
Ac -- Arnplifu.l. + cqrrier 6'ig4d in VolE-
Fe = fieTueog S &rrier signaf in Hz
4. = phore + cqrrT<r 6i7ne |" i"r deTr<e6 ,
b DependtnT en -the q t-lertrrtr pqrqnnefer S cqrrrer 6igmal,
qf,e 3 -+Vp.x of Mod crlaliory':lechnigu€8 ?rqnn"l? ,
i) {fpti&d.
.IN
XRfXIRIgt : {rrnptitud. g Grrter ix ellereJ,
I XdXJS{gn
C I pregueog -4 cqtrrier la alfe
"ed.
utr {p{1!3UX i phoxe + cqrrler i,r q l-le red,
N
5. Modutqled x.i*nd 3-
ha+"-r n,rA'^
SY
-lhe fesultunF signqJ
oF{er lhe process *
r'rodulafie4 is cqiled q6 ,. Moduhkd gtryd'l fhix niTnd eonsia[-
U
'! modufatfn6 siVna,) o.,d cqrrie
^6 fitgna) "
vfalhernuiicet)y ii ia denofed by S (+).
VT
ffggl"eirhu Annpffuale ,nodulq]ed 6i7,ra.l for orrg m(t) la grven b3
s(+)= A. I t* k^rn6! cos(ax{"f)
Nl'reve, Kq= fuptifuje \'r
Eensi]iuitg fqrqmekr ( slerts
"g..ffi11
Ntl'Jn thix .",oJuk -the@ oool *?q.r,v
v\Aa'r odgnarn
oonqlsx in
dtn.,-u:ad ^^/^,!
' Fx.uPr@ ! r* ?,c q'lechnrTqe -uxeJ td converts
.lf me donn*ic) ,x'iftnqJ J5 #re?ueog dor"rc.lO F,igrvJ,
Lx'. L.e ,, Tn t|) .- F' T ) M (e)
sc+,) ,Fr > s(PJ
+ Qmpl"iaa, qepre1entqh'pn + M(f )@scf) fs cqlled *"q,ecftu'
r t(
Studied smart, not hard — thanks to VTUSync.in
+ trre?ueoly.gffcfnrrl-y $ves the glt4. _$ fteVltqnq CrnponepE-"
, Tir"ble 1 ftives fhe F@eff ien =gansfor rra*iot-) ,F +ru 6+d"da^rd
-*f rne ds{odin 6\VnaB , which ere ?repea{ed !g tued nn thjr nrdule .
Tirne Doqnoi O Eignof -Fou
ri er Jta nSfor rnqhon
( r.r)
x(f)=
Any q.r,saql fosine € iXna) qf Jourqr
Ni lb- a-,plrtr.rde A o a,rcl
f=go +gfo L; specfrunn of X(+)
4, e?uen cu 'f, ' * S(f-pd) aod rcF+fo)
0 ro. qre ..}6PUlse,_;flflrn[
qnd f= -Fc
.IN
ruitb-
€?uqf qnnpfrludex
Ao
E'
C
N
rnt+). &nfotr
* t" (r-Ft+ m rr+r,f
Cos
)
SY
Produd'
* lvl (+) + specfnro qf
' b'nntt) shot'oo
U
?.'4t^t
Cen+rreJ 'j
f= O
+Mrr_ro)_u
VT
;M(Ft -
Hl*ffi_
f=f,o ,.-
Mff) o\t
cenler fr n(q
f=_Fo
tble i,
N\n /\-
=4drnn"luge6 :F LEinV nnoJuhHon process tzn @-,-.-mics$ian
sy*fernt Are Ag follorus .
1. Reduce,s-fhe heighb gr'A"lr-nna.
2. Avoi& h.rixiop $ 6Qnatx
B. +llourrS Mu lfiplexin1
"'F
siA nql8
4, Atlotd8 Ad.u^trnenft + Aqndruiat[
5. :fncreclr"s -h" 11cr,.,?€ -F GrnrnUnl@hen
6. I.rzrprovesStudied
eUotitl Bpqsp+fon.
Ve nKaJeaha . N.f , JRtr +
smart, not hard
otl.
"f
— thanks to VTUSync.in
Reu lf./, Oep|. DF ECE svlr
SAI VIDYA INSTITUTE OF TECHNOLOGY
Venkatesha M, Department of ECE
.IN
PRINCIPLES OF
COMMUNICATION SYSTEMS
C
N
(15EC45)
SY
IV SEMESTER ECE
MODULE 1 SYLLABUS
U
AMPLITUDE MODULATION:
Introduction, Amplitude Modulation: Time & Frequency – Domain description, Switching
VT
modulator, Envelop detector
(Page No. 1 -23)
DOUBLE SIDE BAND-SUPPRESSED CARRIER MODULATION:
Time and Frequency – Domain description, Ring modulator, Coherent detection, Costas Receiver,
Quadrature Carrier Multiplexing (QAM). (Page No. 24 -37)
SINGLE SIDE–BAND AND VESTIGIAL SIDEBAND METHODS OF
MODULATION:
SSB Modulation, VSB Modulation, Frequency Translation, Frequency- Division Multiplexing,
Theme Example: VSB Transmission of Analog and Digital Television
(Page No. 38 -50)
Studied smart, not hard — thanks to VTUSync.in
,MODULE -1 AMPLI TUDE MODULATION
TNTKODUC TION :_
Messctfle signc ls o?te ?n cornrpa*rb-le for d i recf -*rorv6 nnjs sion . For
* "rg'r.t, _h :trove) )onXet_dixFqnce^, f I Sftengh f,,ox b
::
tmc^reased by
be
^odula*fo7 Nifb a l-,igr. frena<nca cerrier krqVe.
o l*erfin7 qnt6 eae pororrel.er (o^
er 5i?nql, in accorJqnc" hJ?th '1ine
rn€ssqfle srSnal bil keepg_u_r7 CrlBer
fenF .
1, shoru s tt-te general Sche.mrqlic
F-r7uae
TrepTsaerdofion g .^odulq+ion
.IN
Process" r* covxlai
t s-fupea ,3 6iTnoLs qa follorux,
Modutq*or
signa
C n4odLllqled
I siSnaI
N
SY
N P'J€,TI:
ru hfch Con{,ai rg A nnesse fl€
U
ft beJnqnxnni*"d, is cqlled @8 nnesso?e 5i7nal. T+ is crlao
VT
Knorrn qx'
?Wf;bgpd Sixrnlr ruhi4t'., hqa b' ladengo tae process
* nnodura$,'on,
{ence Tt Ts el80 ne,ned (x ,'I$5!gE1in7 g!',i
lrla#',enna ffl c q tr y
, ?t T.s &rtted bg nn tt) .
9U. rnct) = A. cosanf-1
ruhere, A-= Annpti*tld. *F nneseq?e gignaf ln Voto.
fo,, = freclruen !g 4 nnessqgR STgnal , .f 4 Hs.
*t Jn f vuq,ru€o gg J oitt lhe .8pecln-rro + nn c b) lr Aenot tr
"rn
U14 M (F), lhe .8 Fecttu'rr Ia bq",J l; rnited b & r,..t uz .
Mtf) ..Nhert
' M(o) + M(f)
= Annplifude
feguo,lrg frrepen%E}
Studied smart, not hard — thanks to VTUSync.in
nl(qlexha. M, JRtr & AolTrlor.t Fol(u lhJ, DePt eP EcS
,{, Cq-miet
A-.l'z\- -/ /r\1il4 i. f}, is a_ high fre_q,uenu/ aignd, r-xed h-
c qr ?F$ bte sl1nd -E J,he Te ce? ver cf {er nn odu l"}ion . '
MqttFnnq.licol! it iS dey,oted by c C+) .
Er "" c c+)
= A. cos@n+& + 4" ), i B E-pqrqnneterx ere
Ac -- Arnplifu.l. + cqrrier 6'ig4d in VolE-
Fe = fieTueog S &rrier signaf in Hz
4. = phore + cqrrT<r 6i7ne |" i"r deTr<e6 ,
b DependtnT en -the q t-lertrrtr pqrqnnefer S cqrrrer 6igmal,
qf,e 3 -+Vp.x of Mod crlaliory':lechnigu€8 ?rqnn"l? ,
i) {fpti&d.
.IN
XRfXIRIgt : {rrnptitud. g Grrter ix ellereJ,
I XdXJS{gn
C I pregueog -4 cqtrrier la alfe
"ed.
utr {p{1!3UX i phoxe + cqrrler i,r q l-le red,
N
5. Modutqled x.i*nd 3-
ha+"-r n,rA'^
SY
-lhe fesultunF signqJ
oF{er lhe process *
r'rodulafie4 is cqiled q6 ,. Moduhkd gtryd'l fhix niTnd eonsia[-
U
'! modufatfn6 siVna,) o.,d cqrrie
^6 fitgna) "
vfalhernuiicet)y ii ia denofed by S (+).
VT
ffggl"eirhu Annpffuale ,nodulq]ed 6i7,ra.l for orrg m(t) la grven b3
s(+)= A. I t* k^rn6! cos(ax{"f)
Nl'reve, Kq= fuptifuje \'r
Eensi]iuitg fqrqmekr ( slerts
"g..ffi11
Ntl'Jn thix .",oJuk -the@ oool *?q.r,v
v\Aa'r odgnarn
oonqlsx in
dtn.,-u:ad ^^/^,!
' Fx.uPr@ ! r* ?,c q'lechnrTqe -uxeJ td converts
.lf me donn*ic) ,x'iftnqJ J5 #re?ueog dor"rc.lO F,igrvJ,
Lx'. L.e ,, Tn t|) .- F' T ) M (e)
sc+,) ,Fr > s(PJ
+ Qmpl"iaa, qepre1entqh'pn + M(f )@scf) fs cqlled *"q,ecftu'
r t(
Studied smart, not hard — thanks to VTUSync.in
+ trre?ueoly.gffcfnrrl-y $ves the glt4. _$ fteVltqnq CrnponepE-"
, Tir"ble 1 ftives fhe F@eff ien =gansfor rra*iot-) ,F +ru 6+d"da^rd
-*f rne ds{odin 6\VnaB , which ere ?repea{ed !g tued nn thjr nrdule .
Tirne Doqnoi O Eignof -Fou
ri er Jta nSfor rnqhon
( r.r)
x(f)=
Any q.r,saql fosine € iXna) qf Jourqr
Ni lb- a-,plrtr.rde A o a,rcl
f=go +gfo L; specfrunn of X(+)
4, e?uen cu 'f, ' * S(f-pd) aod rcF+fo)
0 ro. qre ..}6PUlse,_;flflrn[
qnd f= -Fc
.IN
ruitb-
€?uqf qnnpfrludex
Ao
E'
C
N
rnt+). &nfotr
* t" (r-Ft+ m rr+r,f
Cos
)
SY
Produd'
* lvl (+) + specfnro qf
' b'nntt) shot'oo
U
?.'4t^t
Cen+rreJ 'j
f= O
+Mrr_ro)_u
VT
;M(Ft -
Hl*ffi_
f=f,o ,.-
Mff) o\t
cenler fr n(q
f=_Fo
tble i,
N\n /\-
=4drnn"luge6 :F LEinV nnoJuhHon process tzn @-,-.-mics$ian
sy*fernt Are Ag follorus .
1. Reduce,s-fhe heighb gr'A"lr-nna.
2. Avoi& h.rixiop $ 6Qnatx
B. +llourrS Mu lfiplexin1
"'F
siA nql8
4, Atlotd8 Ad.u^trnenft + Aqndruiat[
5. :fncreclr"s -h" 11cr,.,?€ -F GrnrnUnl@hen
6. I.rzrprovesStudied
eUotitl Bpqsp+fon.
Ve nKaJeaha . N.f , JRtr +
smart, not hard
otl.
"f
— thanks to VTUSync.in
Reu lf./, Oep|. DF ECE svlr
