mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
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fiWis moculoba simZlavris marTvisas.<br />
Tu <strong>da</strong>vuSvebT rom qselis yvela sabazo sadgurisaTvis:<br />
_ TiToeul fiWaSi SesaZlebelia trafikis M<br />
arxis gamoyeneba;<br />
_ gavrcelebis rTuli pirobebis gamo miRebuli<br />
signali <strong>da</strong>mokidebulia mobilur abonentsa <strong>da</strong> sabazo<br />
sadgurs Soris <strong>da</strong>Sorebis m-ur xarisxze;<br />
_ P R simZlavre, romelsac asxivebs sabazo sadguri<br />
erT kodur arxSi, SeirCeva im<strong>da</strong>gvarad, rom<br />
uzrunvelyos miRebuli signalis saWiro done fi-<br />
Wis sazRvarze;<br />
sabazo sadgurebis antenebi moqmedeben horizontalur<br />
sibrtyeSi.<br />
maSin, nebismieri <strong>mobiluri</strong> abonentebisaTvis<br />
lokaluri fiWis SigniT SesaZlebelia Caiweros<br />
gamosaxuleba (2.1) garemomcveli mezobeli fiWebis<br />
sxva<strong>da</strong>sxva ricxvisa <strong>da</strong> fiWaSi abonentis ganlagebis<br />
sxva<strong>da</strong>sxva SemTxvevisaTvis.<br />
SemTxveva, rodesac abonenti ganlagebulia Tavisi<br />
fiWis sazRvarze, mocemulia literaturaSi. ganvixilod<br />
ufro zogadi SemTxveva. vTqvaT lokaluri<br />
fiWis j-uri abonenti imyofeba fiWis SigniT nebismier<br />
adgilze <strong>da</strong> mis kodur arxs eniSneba sim-<br />
Zlavre Semdegi wesis Sesabamisad:<br />
<br />
Pj PR<br />
( rj<br />
/ R)<br />
, (1.2)<br />
sa<strong>da</strong>c r _ manZilia bazuri sadguri<strong>da</strong>n (bs) j-iur<br />
j<br />
abonentamde. cxadia, rom nebismier SemTxvevaSi -<br />
romeliRac <strong>da</strong>debiTi ricxvia.<br />
maCvenebeli arsebiTad <strong>da</strong>mokidebulia gavrcelebis<br />
pirobebze <strong>da</strong> icvleba 2-<strong>da</strong>n (praqtikulad Tavis-<br />
46<br />
ufali sivrce) 6-mde (pir<strong>da</strong>piri xilvadobis ar arseboba<br />
Senobis SigniT). konkretuli Sedegebis mis-<br />
aRebad <strong>da</strong>vuSvaT, rom β =2. vaCvenoT, rom simZlavris<br />
marTvisas qselSi jamuri interferenciis saSualo<br />
mniSvneloba fiWebis usasrulo ricxvisas arsebiTad<br />
mcirea mniSvnelobaze, romelic miiReba sim-<br />
ZlavriT marTvis sqemis gamoyenebis gareSe. es sa-<br />
Sualebas iZleva gaizardos abonentTa <strong>da</strong>saSvebi<br />
ricxvi TiToeul fiWaSi.<br />
<strong>da</strong>vuSvaT, rom M <strong>mobiluri</strong> abonenti, romliTac<br />
mocemuli bazuri sadguris lokaluri fiWis M<br />
arxi emsaxureba, SemTxveviT <strong>da</strong> Tanabrad aris ganawilebuli<br />
fiWaSi. viRebT ra, rom fiWas aqvs wris<br />
forma, <strong>da</strong>vyoT igi rgolebad saSualo radiusiT r q ,<br />
0 < r q < R, q=1,2,...Q, sa<strong>da</strong>c Q _rgolebis ricxvia, romelic<br />
mTlianad faravs lokaluri fiWis farTobs.<br />
abonentebis saSualo ricxvi M q , romelic q nomris<br />
rgolSi aRmoCndeba:<br />
Mq γ rq<br />
, 0 rq<br />
R,<br />
sa<strong>da</strong>c γ _ proporciulobis koeficientia <strong>da</strong><br />
M <br />
Q<br />
<br />
q 1<br />
M<br />
q<br />
.<br />
Tu <strong>da</strong>vuSvebT, rom yvela abonentebs, romlebic<br />
imyofebian rgolSi q nomriT, simZlavris marTvis<br />
kanonis Sesabamisad eniWebaT simZlavre P q , maSin<br />
jamuri simZlavre P t , gamosxivebuli lokaluri<br />
fiWis bs-is mier:<br />
R<br />
3<br />
2<br />
r R<br />
P t PR<br />
γ<br />
dr P<br />
2 Rγ<br />
. (1.3)<br />
R 4<br />
0<br />
47
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