mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
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cxr. 2.3.<br />
TACS <strong>sistemebi</strong>s sixSireTa deviacia<br />
signalis saxeoba modulaciis saxeoba sixSiris deviacia, khc<br />
salaparako sixSiruli modulacia 9,5<br />
tonaluri<br />
monacemTa signalebi<br />
orobiTi sixSiruli<br />
manipulacia<br />
orobiTi sixSiruli<br />
manipulacia<br />
62<br />
+1,7(~1~) _ 1,7 (~0~)<br />
+ 6,4(~1~) _ 6,4(~0~)<br />
Tavi III. <strong>mobiluri</strong> <strong>telekomunikaciis</strong><br />
cifruli fiWuri <strong>sistemebi</strong><br />
cifruli fiWuri <strong>mobiluri</strong> kavSiris <strong>sistemebi</strong><br />
warmoadgenen am ti pis <strong>sistemebi</strong>s meore Taobas. analogur<br />
sistemebTan Se<strong>da</strong>rebiT isini uzrunvelyofen<br />
abonentebisaTvis momsaxurebis farTo speqtrs<br />
<strong>da</strong> kavSiris maRal xarisxs. amasTan, aRniSnuli stan<strong>da</strong>rtis<br />
gamoyenebisas SesaZlebelia urTierTqmedeba<br />
ISDN (Indegrated service Digital Network-cifruli qselebi<br />
momsaxurebis integraciiT) <strong>da</strong> PDN (Packet Date<br />
Network-paketuri ga<strong>da</strong>cemis qseli) qselebTan. am sistemebs<br />
Soris yvelaze didi gavrceleba hpova im<br />
qselebma, romlebic agebulia GSM (DCS-1800), D-AMPS<br />
(ADC), JDC, CDMA stan<strong>da</strong>rtebze. maTi Se<strong>da</strong>rebiTi<br />
maxasiaTeblebi mocemulia cxr. 3.1. sa<strong>da</strong>c:<br />
GMSK-Gaussian Minimum Shift Keying _gausis manipulaciaa<br />
minimaluri sixSiruli <strong>da</strong>ZvriT;<br />
QPSK-Quadrature Phase Shift Keying _kvadraturuli<br />
fazuri manipulaciaa, romelSic gamoiyeneba ga<strong>da</strong>mtani<br />
sixSiris 4 elementi;<br />
DQPSK-Differential QPSK- diferencialuri QPSK;<br />
RPE-LTR, VSELP-salaparako signalebis kodirebis<br />
algoriTmebia.<br />
3.1. <strong>mobiluri</strong> <strong>telekomunikaciis</strong> GSM<br />
stan<strong>da</strong>rtis fiWuri sistema<br />
zoga<strong>da</strong>d GSM stan<strong>da</strong>rtis fiWuri kavSiris sistema<br />
gankuTvnilia komerciul sferoSi gamoyenebisaTvis.<br />
momxmarebels am stan<strong>da</strong>rtis sistemebSi miewodeba<br />
momsaxurebis farTo speqtri <strong>da</strong> aqvs SesaZlebloba<br />
63
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