mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
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sixSiris neli naxtomebis gamoyeneba SFH (Slow<br />
Fregueney Hopping). maTi ZiriTadi <strong>da</strong>niSnulebaa six-<br />
Siruli ganawilebis uzrunvelyofa radioarxebSi,<br />
romlebic funqcionirebs radiotalRebis mravalsxivuri<br />
gavrcelebis pirobebSi. sixSiris neli naxtomebi<br />
gamoiyeneba yvela mobilur qselebSi, rac<br />
saabonento sadgurebis neli moZraobisas amaRlebs<br />
kodirebisa <strong>da</strong> Senacvlebis efeqturobas.<br />
nax. 3.8. GSM stan<strong>da</strong>rtSi kavSiris arxebis<br />
kombinirebuli TDMA/FDMA sqema<br />
82<br />
neli naxtomebis formirebis princi pi sixSiruli<br />
TvalsazrisiT mdgomareobs SemdegSi: Setyobineba,<br />
romelic ga<strong>da</strong>icema abonentisTvis gamoyofili<br />
drois intervalSi TDMA – kadrSi 0,577 wm, yovel<br />
momdevno kadrSi ga<strong>da</strong>icema (miiReba) axal fiqsirebul<br />
sixSireze (nax. 4.8). kadrebis struqturis Sesabamisad<br />
sixSiris gar<strong>da</strong>qmnisaTvis saWiro dro Seadgens<br />
<strong>da</strong>axloebiT 1 mwm-s.<br />
sixSiris naxtomebis procesSi mudmivad Senar-<br />
Cunebulia sxvaoba miRebisa <strong>da</strong> ga<strong>da</strong>cemis arxebs<br />
Soris (nax. 3.8). yvela aqtiur abonents, romlebic<br />
erT fiWaSi mdebareobs, eniWeba sixSireTa ga<strong>da</strong>rTvis<br />
ga<strong>da</strong>ukveTavi mimdevrobebi, rac gamoricxavs xarvezebs<br />
abonentebs Soris Setyobinebis miRebisas. six-<br />
SireTa ga<strong>da</strong>rTvis mimdevrobis parametrebi (six-<br />
Sirul-droiTi matrica <strong>da</strong> sawyisi sixSire) moiniSneba<br />
yoveli <strong>mobiluri</strong> sadgurisaTvis <strong>da</strong>myarebis<br />
procesSi.<br />
kavSiris arxebi GSM stan<strong>da</strong>rtSi SeiZleba <strong>da</strong>vyoT<br />
fizikur <strong>da</strong> lokalur arxebad. fizikuri arxi<br />
iqmneba signalebis droiTi <strong>da</strong> sixSiruli <strong>da</strong>yofis<br />
kombinirebis gziT <strong>da</strong> ganisazRvreba rogorc radiosixSiruli<br />
arxebisa (sixSireTa SesaZlo naxtomebiT),<br />
ise TDMA-kadris droiTi intervalebis mimdevroba.<br />
yoveli ga<strong>da</strong>mtani Seicavs 8 fizikur arxs, gan-<br />
Tavsebuls TDMA – kadris 8 droiTi intervalis<br />
sazRvrebSi. yoveli fizikuri arxisaTvis yovel<br />
TDMA-kadrSi gamoiyeneba erTi <strong>da</strong> igive droiTi<br />
intervali.<br />
83
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