mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
mobiluri telekomunikaciis miwispira da Tanamgzavruli sistemebi
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los speqtris siganisagan <strong>da</strong>mokidebulebiT. (N=1,3,6,9<br />
<strong>da</strong> 12). yovel qvega<strong>da</strong>mtanze informacia ga<strong>da</strong>icema<br />
Cipuri siswrafiT 1,2288 mCip|wm.<br />
cdma 2000 –is agebis aseTi principi iZleva Sesa-<br />
Zleblobas, rom efeqturad iqnas gamoyenebuli mTeli<br />
muSa diapazoni zolis siganiT 5, 10, 15 <strong>da</strong> 20 mhc.<br />
nax. 5.5-ze mocemulia sixSiruli zolis<br />
gamoyenebis sami xerxi cdma 2000 sistemis mowyobis<br />
gansxvavebuli variantebis dros.<br />
1,25 mhc<br />
f1 f2 f3 f4 f f<br />
5<br />
6 f7 Δf f mhc<br />
Δf<br />
a)<br />
0 1 2 3 4 5 6 7 8 9 10<br />
b)<br />
Δf<br />
f 1<br />
3,75 mhc<br />
0 1 2 3 4 5 6 7 8 9 10<br />
7,5 mhc<br />
122<br />
f mhc<br />
f2<br />
f1<br />
f mhc<br />
Δf<br />
Δf<br />
g)<br />
0 1 2 3 4 5 6 7 8 9 10<br />
nax . 4.5. 1 0 mhc sixSiruli zolis g amoyenebis<br />
variantebi sistemis agebis gansxvavebuli variantebis<br />
dros:<br />
a) MC-CDMA (N=7);<br />
b) DS-CDMA (1X+3X+3X) sa<strong>da</strong>c X=1,25mhc;<br />
g) DS-CDMA (1X+6X).<br />
f 2<br />
Δf<br />
rogorc naxazi<strong>da</strong>n Cans 10 mhc sixSirul zolSi<br />
SeiZleba moTavsdes 7 arxi TiToeulis sixSiruli<br />
zoliT 1.25 mhc (DS-CDMA varianti) an kidev 1 arxi<br />
sixSiruli zoliT 1,25 mhc <strong>da</strong> erTi arxi sixSiruli<br />
zoliT 7,5 mhc (DS-CDMA varianti). xolo <strong>da</strong>cvi-<br />
Ti intervalebi Seadgens 625 khc-s.<br />
meore variantSi signali ga<strong>da</strong>icema gafarTovebuli<br />
speqtriT erT qvega<strong>da</strong>mtanze Cipuri siCqariT 1,2288<br />
mCip/wm. amis gamo SeiZleba miviRoT siCqareebis Semdegi<br />
rigi R=NX1,2288 mCip/wm, roca N=1, 3, 6, 9, 12. Cdma2000-<br />
Si bazur siCqared miRebulia R=3,6864 mCip/wm.<br />
v) CDMA-2000-s <strong>da</strong> WCDMA-s Se<strong>da</strong>rebiTi analizi<br />
adre ukve iTqva konkurentuli brZolis Sesaxeb,<br />
romelic ganviTar<strong>da</strong> CDMA2000 <strong>da</strong> WCDMA proeqtebis<br />
harmonizaciis etapze <strong>da</strong> riTac <strong>da</strong>mTavr<strong>da</strong> kompania<br />
Ericsson-sa <strong>da</strong> Qualcomm-s Soris <strong>da</strong>pirispireba.<br />
1999 wels miRebulma kompromisulma ga<strong>da</strong>wyvetilebam<br />
me-3 Taobis teqnologiebs gza gauxsna. samxreT<br />
amerikuli CDMA2000 proeqti srulyofilad SemuSav<strong>da</strong><br />
IMT-MC (MC-CDMA varianti) stan<strong>da</strong>rtis fargleb-<br />
Si, xolo muSaoba WCDMA <strong>da</strong> UTRA-s mxriv gaiyo<br />
ori mimarTulebiT. pirveli starti IMT-DS bazirdeba<br />
WCDMA FDD <strong>da</strong> UTRA FDD teqnikur ga<strong>da</strong>wyvetilebebze<br />
(sixSiris wyvili zolisaTvis), xolo meore<br />
IMT-TC (arawyvili zolisaTvis), <strong>da</strong>fuZnebulia evropuli<br />
proeqtis UTRA TDD-s <strong>da</strong> iaponuri proeqtis<br />
TD-SCDMA-s teqnikur ga<strong>da</strong>wyvetilebebze.<br />
CDMA2000-is <strong>da</strong> WCDMA-s sawyisi gansxvaveba,<br />
romelic gax<strong>da</strong> cxare polemikis sagani iyo gansxvavebuli<br />
Cipuri siCqareebi 3,6884 <strong>da</strong> 3,84 mCip|wm. sabazo<br />
sadgurebis signalebis <strong>da</strong>yofisaTvis CDMA2000-<br />
Si gamoiyeneba mokle kodebi sigrZiT 2 15 gansxvavebu<br />
123
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