the diversity techniques for wireless communication
TRANSCRIPT
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EIVD]WIUY UDGCJIQTDW FO]
RI]DKDWW GOLLTJIGAUIOJ
^rdsdjtde My0
Mieci Walajtray
1>11>16>49
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GOJUDJUW1. Ijtroeugtioj
=. Jdde of Eivdrsity
7. Gkassifigatioj of Eivdrsity
5. Eivdrsity Udgcjiquds
a) Frdqudjgy Eivdrsity
m) Uild Eivdrsityg) ^okarizatioj Eivdrsity
e) Wpagd Eivdrsity
I. Wdkdgtioj Eivdrsity
II. Fddemagh Eivdrsity
III. Laxilak ratio Golmijijb
IV. Dquak Baij Golmijijb 4. Gojgkusioj
6. ]dfdrdjgd
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IJU]OETGUIOJ
Eivdrsity is a powdrfuk gollujigatioj tdgcjiqud.
It provieds wirdkdss kijh ilprovdldjt at rdkativdky kow
gost.
It dxpkoits tcd rajeol jaturd of raeio propabatioj my
fijeijb ijedpdjedjt sibjak patc for gollujigatioj.
Ucdsd ijedpdjedjt patcs ard cibcky ujgorrdkatde.
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JDDE OF EIVD]WIUY
If ojd raeio patc ujedrbods a eddp faed ajotcdr ijedpdjedjt patc lay cavd a strojb sibjak.
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EIVD]WIUY-IL^O]UAJU G]IUD]IA
Gritdria jdgdssary to omtaij a cibc edbrdd of ilprovdldjt frol a eivdrsity systdl ard0-
1) Ucd faeijb ij ijeivieuak mrajgcds scouke md cibcky
ujgorrdkatde.
=) Ucd ldaj powdr avaikamkd ij dagc mrajgcds scouke
md aklost dquak.
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UY^DW OF EIVD]WIUY
LagrosgopigEivdrsity
• ^rovieds a ldtcoe to litibatd tcd ldtcoes of scaeowijb as ij gasd of karbd sgakd faeijb.
Ligrosgopig
Eivdrsity
• ^rovieds a ldtcoe to litibatd tcd ldtcoes of luktipatc faeijb as ij gasd of slakk sgakd faeijb.
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LAG]OWGO^IG EIVD]WIUY
Karbd sgakd faeijb is gausde my scaeowijb eud to tcdprdsdjgd of omstagkds ij tcd raeio patc.
Kojb tdrl faeijb gaj md litibatde my lagrosgopig
eivdrsity(appky oj sdparatde ajtdjja sitds)kihd tcd eivdrsityusijb two masd statiojs.
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LIG]OWGO^IG EIVD]WIUY
Wlakk sgakd faeds ard gcaragtdrizde my eddp aje rapie
alpkitued fkugtuatiojs wcigc oggur as tcd lomikds lovds ovdr eistajgds of `ust a fdw wavdkdjbtcs.
Ucdsd faeds ard gausde my luktipkd rdfkdgtiojs frol
surroujeijbs ij tcd vigijity of tcd lomikd.
Wcort tdrl faeijb gaj md litibatde my tcd eivdrsity usijb
luktipkd ajtdjjas oj tcd masd statioj or lomikd ujit.
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EivdrsityUdgcjiquds
FrdqudjgyEivdrsity
UildEivdrsity
^okarizatiojEivdrsity
WpagdEivdrsity
WdkdgtiojEivdrsity
FddemaghEivdrsity
Laxilak ratiogolmijijb
Dquak baijGolmijijb
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F]DQTDJGY EIVD]WIUY
Urajslits tcd sald sibjak witc eiffdrdjt frdqudjgids.
Frdqudjgy sdparatioj scouke md tcdj tcd gocdrdjgd
majewietc.
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UILD EIVD]WIUY
Urajslits tcd ijforlatioj sibjak rdpdatdeky at rdbukar ijtdrvaks.
Ucd sdparatioj scouke md brdatdr tcaj tcd gocdrdjgd
tild.
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W^AGD EIVD]WIUY
A ldtcoe of trajslissioj or rdgdptioj, or motc, ij wcigc tcddffdgts of faeijb ard lijilizde my tcd siluktajdous usd of
two or lord pcysigakky sdparatde ajtdjjas.
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^OKA]IPAUIOJ EIVD]WIUY
Tsds ajtdjja of eiffdrdjt pokarizatiojs i.d. corizojtak ajevdrtigak.
Ucd ajtdjja’s tahd aevajtabd of tcd luktipatc propabatioj
gcaragtdristigs to rdgdivd sdparatd ujgorrdkatde sibjaks.
WJ] is ilprovde my upto 1=em dvdj ij kijd-of-sibct gcajjdks.
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WDKDGUIOJ EIVD]WIUY
Wdkdgtijb tcd mdst sibjak alojb akk tcd sibjaksrdgdivde frol eiffdrdjt mragcds at tcd rdgdivijb dje.
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FDDEMAGH EIVD]WIUY
Wgajjijb akk tcd sibjaks ij a fixde sdqudjgd ujtik tcdojd witc WJ] lord tcaj a prdedtdrlijde tcrdscoke is
iedjtifide.
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LASILAK ]AUIO GOLMIJIJB
Golmijijb akk tcd sibjaks ij a go-pcasde ajewdibctde lajjdr so as to cavd tcd cibcdst agcidvamkd
WJ] at tcd rdgdivdr at akk tilds.
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DQTAK BAIJ GOLMIJIJB
Golmijijb akk tcd sibjaks ij a go-pcasde lajjdr witcujity wdibcts for akk sibjak kdvdks so as to cavd tcd
cibcdst agcidvamkd WJ] at tcd rdgdivdr at akk tilds.
^drforlajgd is larbijakky ijfdrior to Laxilak ratiogolmijijb mut supdrior to sdkdgtivd eivdrsity.
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GOJGKTWIOJ
Ucd eivdrsity is usde to provied tcd rdgdivdr witcsdvdrak rdpkigas of tcd sald sibjak.
Eivdrsity tdgcjiquds ard usde to ilprovd tcd
pdrforlajgd of tcd raeio gcajjdk witcout ijgrdasd ijtrajslittde powdr.
L]G bivds tcd mdst pdrforlajgd of akk otcdr golmijijb tdgcjiquds.
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]DFD]DJGDW
X1\ Jddkal Wrivastava,“Eivdrsity sgcdlds for wirdkdssgollujigatioj“, @ourjak of Ucdordtigak aje Appkide
Jdtworh, Vok 14, Jo-=, Lay =>1>.
X=\ W.L. Akalouti, ‛A silpkd trajslit eivdrsity tdgcjiqud
for Rirdkdss Gollujigatiojs“, Wdkdgtde Ardas ijGollujigatioj IDDD, Vok 16, Issud 3, pp 1541-1543,
Ogt 1993.
X7\ ]appaport. E, ‛Rirdkdss Gollujigatiojs
^rijgipkds aje ^ragtigd“, Dabkd cooe Gkiffs,
J@0 ^rijtigd Cakk 1996.
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UCAJH YOT