mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
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mimdinare koordinatebia.<br />
2 2 D r 2D<br />
r cos <br />
<br />
_ mezobeli fiWebis abo-<br />
nentebs <strong>da</strong> BS 0 -is antenebs Soris mimdinare manZi-<br />
lia.<br />
movaxdinoT mxolod erTi fiWis analizi, ramdena<strong>da</strong>c<br />
am analizis Sedegi analogiuri iqneba <strong>da</strong>narCeni<br />
fiWebisTvisac.<br />
abonentebi fiWaSi ganTavsebulia Tanabarzomierad.<br />
abonentebis raodenobis albaTobis simkvrive<br />
fiWis mocemul wertilSi koordinatebiT r, <br />
(nax. 1.10)<br />
r, <br />
W { πr , r R<br />
0<br />
1<br />
2 ;<br />
,<br />
r R<br />
signalis simZlavre, romelic miRebulia mezobeli<br />
fiWis erTi aqtiuri MS-<strong>da</strong>n, saSualod Seadgens<br />
P<br />
r, <br />
W P<br />
BS<br />
1<br />
BS<br />
RX .<br />
S <br />
RX <br />
X dS<br />
nax. 1.12. mezobeli fiWebis MS abonentebis<br />
urTierTxelSeSlebis gaangariSebisaTvis<br />
36<br />
Tu gavavrcelebT miRebul Sedegs eqvsi mosazRvre<br />
fiWis SemTxvevaze, miviRebT urTierT<strong>da</strong>brkolebaTa<br />
simZlavris jamur sidides, romelic momdinareobs<br />
mezobeli fiWebis aqtiuri abonentebi<strong>da</strong>n:<br />
BS<br />
P 6<br />
RX <br />
MP<br />
BS<br />
RX<br />
.<br />
Tu vivaraudebT, rom sistemis gatarebis unari<br />
SezRudulia mxolod urTierT<strong>da</strong>brkolebebiT, ma-<br />
Sin ukuarxSi s/x-is SefadebisTvis gveqneba:<br />
2B<br />
2<br />
q ;<br />
1<br />
75M<br />
S 1<br />
imisaTvis, rom CDMA sistemis potencialuri Sesa-<br />
Zleblobebi maqsimalurad iqnes gaTvaliswinebuli,<br />
CavTvaloT, rom sasaubro pauzis dros informacias<br />
ar ga<strong>da</strong>scemen. Tu _ albaTobaa imisa, rom<br />
abonenti drois mocemul momentSi laparakobs,<br />
xolo (1- ) – albaTobaa imisa, rom is Cuma<strong>da</strong>a, maSin<br />
albaToba imisa, rom fiWis seqtoris M s aqtiuri<br />
abonentebi<strong>da</strong>n mocemul momentSi laparakobs i abonenti,<br />
xolo (M s -i) Cuma<strong>da</strong>a, binomuri ganawilebis<br />
kanonis Sesabamisad qveqneba:<br />
M S i M S<br />
i<br />
p(<br />
i)<br />
<br />
<br />
i <br />
<br />
1 .<br />
<br />
maSasa<strong>da</strong>me, saSualod sistemaSi s/x-is Sefardeba<br />
seqtorSi M aqtiur abonentebTan:<br />
s<br />
M s<br />
<br />
i o<br />
i 2<br />
q p(<br />
i)<br />
.<br />
sabolood miviRebT:<br />
q<br />
M<br />
<br />
M s<br />
2 s i M s i<br />
( 1<br />
)<br />
i 1<br />
i<br />
1,<br />
75M<br />
s<br />
<br />
<br />
2B<br />
1<br />
37
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