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Что является CDMA (Разделение Кодекса Многократный Доступ) (?)

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*oi yaeyaony CDMA (?acaeaeaiea Eiaeaena Iiiaie?aoiue Aeinooi)?

Iaeia ec iaeaieaa aaaeiuo eiioeaioeee e ethaie eeaoi/iie oaeaoiiiie
nenoaia – oaeiaie ” iiiaie?aoiue aeinooi “, icia/ay /oi iiiaie?aoiay,

Iaeiia?aiaiiua iieueciaaoaee iiaoo auoue iiaeaea?aeaiu. Ae?oaeie
neiaaie, aieueoia eiee/anoai iieueciaaoaeae ?acaeaeyao iauaa(iau/iia)
iauaaeeiaiea(aiaeiai) eaiaeia ?aaeei e ethaiai Iieueciaaoaeue iiaeao
iieo/aoue aeinooi ia ethaie eaiae (eaaeaeue iieueciaaoaeue ia anaaaea
iacia/aaony ia oio aea naiue eaiae). I eaiaea iiaeii aeoiaoue eae I?inoi
/anoue ia?aie/aiiiai ?ano?na ?aaeei, eioi?ue a?aiaiii
?aciauai(anneaiiaai) aeey ii?aaeaeaiiie oeaee, oeia /ueaai – oi
ia?auaiey ii oaeaoiio. Iiiaie?aoiue iaoiae aeinooia – ii?aaeaeaiea oiai,
eae niaeo? ?aaeei ?acaeaeai ia eaiaeu e eae eaiaeu
?aciauaiu(anneaiiaaiu) Iiiai iieueciaaoaeae nenoaiu.

Oaeouea Eeaoi/iua Noaiaea?ou

?acee/iua oeiu eeaoi/iuo nenoai iaieiatho ?acee/iua iaoiaeu
iiiaie?aoiiai aeinooia. O?aaeeoeeiiiua aiaeiaiaua eeaoi/iua nenoaiu,
oeia Iniiaaiiue ia I?iaeaeiooii Ianeoaeeaaiee(neoaeaa) Ii?oaoeaiiai
oaeaoiia (AMPS) e Iieiie Nenoaia Eiiioieeaoeee Aeinooia (TACS)
noaiaea?ou, Eniieuecoeoa ?acaeaeaiea *anoiou Iiiaie?aoiue Aeinooi
(FDMA). FDMA eaiaeu ii?aaeaeaiu aeeaiaciiii /anoio ?aaeei, iau/ii
Au?aaeaiiue a iiiaeanoaa eeeiaa?oea (eAoe), ec niaeo?a ?aaeei. Iai?eia?,
AMPS nenoaiu eniieuecotho “ieanoeiu” 30 eAoe Niaeo? aeey eaaeaeiai
eaiaea. Oceiiieiniue AMPS (NAMPS) o?aaoao oieueei 10 eAoe a eaiae. TACS
eaiaeu – oe?eiie 25 eAoe. N FDMA, oieueei iaeei iiaeien/ee iaeiia?aiaiii
iacia/ai ia eaiae. Ieeaeea ae?oaea aanaaeu iiaoo aeinooi yoio eaiae aei
Cai?in iiaeien/eea caeii/ai, eee iiea oio ia?aiia/aeueiue cai?in a?o/ai
io ?acee/iiio eaiaeo nenoaiie. Iauee(iau/iue) iiiaie?aoiue aeinooi

Iaoiae, iaiyoue(eniieuecoaiue) a iiauo oeeo?iauo eeaoi/iuo nenoaiao –
?acaeaeaiea A?aiaie Iiiaie?aoiue Aeinooi (TDMA). TDMA oeeo?iaua
noaiaea?ou aeeth/atho AEeoaeue Naaa?iie Aia?eee Oeeo?iaie Eeaoi/iue
(ciaao noaiaea?oiui iiia?ii -54(/eneii)), Aeiaaeueiay Nenoaia aeey
Ia?aaeaeaeiuo Eiiioieeaoeee (GSM), e Ia?niiaeueiue Oeeo?iaie Eeaoi/iue
(PDC). TDMA nenoaiu iau/ii ia/eiathony n ieanoeiu niaeo?a, oiiiyiooiai
eae iaeei “eo?uea?”(“o?ainii?o”). Eaaeaeue Eo?uea?(o?ainii?o) oiaaea
?acaeaeai ia uaee a?aiy. Oieueei iaeei iiaeien/ee iaeiia?aiaiii iacia/ai
ia eaaeaeue ?ac uaeue, eee eaiae. Ieeaeie ae?oaie Aanaaeu iiaoo aeinooi
yoio eaiae, iiea cai?in iiaeien/eea ia caeii/ai, eee iiea oio
ia?aiia/aeueiue cai?in a?o/ai io ?acee/iiio Eaiae nenoaiie. Iai?eia?,
ssAEssAONss -54 nenoaiaie, ?ac?aaioaiiuie (i?aaeiacia/aiiuie), /oiau
ninouanoaiaaoue n AMPS nenoaiaie, aeaeeoue 30 eAoe niaeo?a a O?e eaiaea.
PDC aeaeeo ieanoeiu 25 eAoe niaeo?a a o?e eaiaea. GSM nenoaiu nicaeatho
8 eaiaeia n ?acaeaeaieai a?aiaie a 200 EAoe oe?ieea
eo?uea?u(o?ainii?ou).

CDMA Eeaoi/iue Noaiaea?o

N CDMA, oieeaeueiua oeeo?iaua eiaeaenu, nei?aa /ai ioaeaeueiua /anoiou
?O eee eaiaeu, eniieuecothony, /oiau aeeooa?aioee?iaaoue iiaeien/eeia.
Eiaeaenu ?acaeaeaiu e, ia?aaeaeaeiie noaioeeae (nioiaue oaeaoii) e
noaioeey iniiau, e iacuaathony ” inaaaeineo/aeiue Eiaeaen
Iineaaeiaaoaeueiinoe. ” Ana iieueciaaoaee ?acaeaeytho oio aea naiue
aeeaiacii niaeo?a ?aaeei. Aeey eeaoi/iiai telephony, CDMA – oeeo?iaie
iiiaie?aoiue aeinooi Oaoieea, oeacaiiay Annioeeaoeeae I?iiuoeaiiinoe
Oaeanayce (TIA) eae ” ssAEssAONss -95 “. A ia?oa 1992, TIA onoaiiaee
Tr-45. 5 iiaeeiiennee n /a?oa?ii ?acaeoey niaeo?a ?ani?ino?aiaiey
oeeo?iaie eeaoi/iue noaiaea?o. A ethea 1993, TIA aeae Iaeia?aiea CDMA –
-95 noaiaea?oa. ssAEssAONss -95 nenoaiaie, aeaeyo niaeo? ?aaeei a
eo?uea?ia(o?ainii?ou), eioi?ua yaeythony 1,250 eAoe (1.25 MHZ) oe?ieee.
Iaeei ec oieeaeueiuo aniaeoia CDMA – oi, /oi, a oi a?aiy eae eiathony
eiia/ii i?aaeaeu iiia?o(/eneo) ia?auaiee ii oaeaoiio, eioi?ua iiaoo
Ia?aaioaiiue eo?uea?ii(o?ainii?oii), yoi – ia onoaiiaeaiiue
iiia?(/enei). Aeiaieueii, niiniaiinoue(aianoeiinoue) nenoaiu aoaeao
caaenaoue io iiiaeanoaa ?acee/iiai Oaeoi?u. Yoi aoaeao ianoaeaeaii a
aieaa iicaeieo naeoeeyo.

CDMA Oaoiieiaey

Oioy cayaeaiea(i?eiaiaiea) CDMA’S a eeaoi/iii telephony ioiineoaeueii
iiai, yoi – ia iiaay oaoiieiaey. CDMA eniieueciaaeny a iiiaeo Aiaiiua
cayaeaiey(i?eiaiaiey), oeia aioe-caaeaathuaai (ec-ca neaiaea
?ani?ino?aiaiey, yoi o?oaeii e i?iaea eee noaeeeaaoueny n CDMA
neaiaeii), ?aniieiaeaiea (ecia?aiea ?annoiyiea ia?aaea/a ciaoue, eiaaea
yoi aoaeao iieo/aii), e aaciianiua eiiioieeaoeee (?ani?ino?aiaiea Neaiae
niaeo?a i/aiue oaa?ae(o?oaeai) iaia?oaeeoue).

Niaeo? ?ani?ino?aiaiey

CDMA – ” niaeo? ?ani?ino?aiaiey ” oaoiieiaey, /oi icia/aao, /oi yoi
?ani?ino?aiyao eioi?iaoeeth, niaea?aeauothny a niaoeeoe/aneii neaiaea
eioa?ana(i?ioeaioa) Ii iaiiiai aieueoaio bandwidth /ai ia?aiia/aeueiue
neaiae. Cai?in CDMA ia/eiaaony ni noaiaea?oiie ii?iie(?ac?yaeii) 9600
/anoeoe a naeoiaeo (9.6 Eeeiaeou a naeoiaeo). Yoi oiaaea ?ani?ino?aiaii
e ia?aaeaiiie ii?ia(?ac?yaeo) i?eaeeceoaeueii 1.23 Iaaaaeou a naeoiaeo.
?ani?ino?aiaiea n?aaenoa, /oi oeeo?iaie Eiaeaenu i?eiaiythony e
/anoeoeai aeaiiuo, naycaiiui n iieueciaaoaeyie a y/aeea. Yoe /anoeoeu
aeaiiuo ia?aaeaiu ia?yaeo n neaiaeaie aanue Ae?oaea iieueciaaoaee a oie
y/aeea. Eiaaea neaiae iieo/ai, eiaeaenu oaeaeaiu io aeaeaoaeueiiai
neaiaea, ioaeaeyy iieueciaaoaeae e Aica?auaiea cai?ina e ii?ia(?ac?yaeo)
9600 bps. O?aaeeoeeiiiua eniieueciaaiey niaeo?a ?ani?ino?aiaiey
iaoiaeyony a aiaiiuo aeaenoaeyo. Ec-ca oe?ieiai Bandwidth neaiaea
niaeo?a ?ani?ino?aiaiey, yoi i/aiue o?oaeii e i?iaea, o?oaeiie
noaeeeaaoueny, e o?oaeiue auaeaeeoue. Yoi iaoiaeeony a Eiio?ano
oaoiieiaeyi, eniieuecothuei aieaa oceee bandwidth /anoio. Oae eae
oe?ieiiieiniue neaiae niaeo?a ?ani?ino?aiaiey i/aiue oaa?ae(o?oaeai) e
Iaia?oaeeoa, yoi ia iiyaeyaony eae ie/oi aieueoa /ai iaaieueoia
iiauoaiea ” ooiiaie iie(yoaae) ” eee o?iaaiue aiaoaoaeuenoa. N ae?oaeie
oaoiieiaeyie, aeanoue(iiuue) Neaiae neiioeaio?e?iaai a aieaa oceie
iieina(i?eano?a), eioi?ay aeaeaao aieaa eaaeei iaia?oaeeoue. Oaaee/aiiay
nae?aoiinoue naienoaaiia CDMA Oaoiieiaey. CDMA ia?auaiey ii oaeaoiio
aoaeao aaciianai io neo/aeiiai eavesdropper n oao ii?, a ioee/ea io
aiaeiaiaie aanaaeu, i?inoia ?aaeei I?eaiiee ia aoaeao niiniaai aua?aoue
eiaeeaeaeoaeueiua oeeo?iaua aanaaeu ec iieiie ?aaeeaoeee ?O a
iieina(i?eano?a) /anoiou.

Neio?iiecaoeey

A caeeth/eoaeueiuo noaaeeyo encoding nayce ?aaeei io noaioeee iniiau aei
ia?aaeaeaeiiai, CDMA aeiaaaeyao niaoeeaeueiue ” inaaaeineo/aeiue Eiaeaen
” e neaiaeo, /oi iiaoi?aiey naiinoiyoaeueii iinea eiia/iiai eiee/anoaa
a?aiaie. Noaioeee Iniiau a nenoaia ioee/atho naay io eaaeaeiai Ae?oaie,
ia?aaeaaay ?acee/iua /anoe eiaeaena a aeaiiia a?aiy. Ae?oaeie neiaaie,
noaioeee iniiau ia?aaeatho aa?nee iiaaoaiey a?aiaie Ec oiai aea naiiai
inaaaeineo/aeiiai eiaeaena. *oiau ?o/aoueny, /oi eniieuecoaiua iiaaoaiey
a?aiaie inoathony oieeaeueiuie io ae?oa ae?oaa, CDMA noaioeee Aeieaeai
inoaoueny neio?iiece?iaaiiui e nnueea(?aeiiaiaeaoeee) iauaa(iau/iia)
a?aiy. Aeiaaeueiay Nenoaia ?aniieiaeaiey (GPS) iaania/eaaao yoi oi/iia
iauaa(iau/iia) a?aiy(ai a?aiy) Nnueea(?aeiiaiaeaoeey). GPS – iniiaaiiue
niooiee, nenoaia iaaeaaoeee ?aaeei, niiniaiay e iaania/aieth
i?aeoe/aneeo e aiciiaeiuo n?aaenoa ii?aaeaeaiey Iai?a?uaiia
iieiaeaiea(iiceoeey), nei?inoue, e a?aiy e iaia?aie/aiiiio iiia?o(/eneo)
iieueciaaoaeae.

” Aeo Aaeaine?iaaiey ”

CDMA ioaao y/aeee caaenei ia iooue, eioi?ui nenoaia
?ac?aaioaia(i?aaeiacia/aia). Oaeoe/anee, o?e ia?ae/iuo ioaao
oa?aeoa?enoee nenoaiu, Ea/anoai, e Aeieaeai niiniaiinoe, auoue
naaeaine?iaaii io ae?oa ae?oaa, /oiau aeinoeaiooue aeaeaoaeueiiai o?iaiy
auiieiaiey(?aaiou) nenoaiu. A CDMA Nenoaia yoe o?e oa?aeoa?enoeee
neeueii iaae-naycaia. Aeaaea aieaa aunieay niiniaiinoue(aianoeiinoue)
iiaea au auoue aeinoeaiooa /a?ac iaeioi?ue a?aaeon(noaiaiue)
Aeaa?aaeaoeey a ioaaoa e-eee ea/anoaa. Oae eae yoe ia?aiao?u ana
ia?aieaoathony, iia?aoi?u ia iiaoo eiaoue eo/oaa ec anao ie?ia: O?e ?aca
aieaa oe?ieee ioaao, niiniaiinoue(aianoeiinoue) 40 ?ac, e caoe ea/anoaa
“EIIIAEO-AeENEA”. Iai?eia?, 13 kbps aieiaea? iaania/eaaao eo/oa
Caoeiaia(ii?iaeueiia) ea/anoai, ii oiaiueoaao niiniaiinoue(aianoeiinoue)
nenoaiu ii n?aaiaieth n 8 kbps aieiaea?.

CDMA Auaiaeu

Eiaaea inouanoaeaii a eeaoi/iie oaeaoiiiie nenoaia, CDMA oaoiieiaey
i?aaeeaaaao iiiai/eneaiiua auaiaeu eeaoi/iui iia?aoi?ai e eo
Iiaeien/eee. Neaaeothuaa – e?aoeee iaci? auaiae io CDMA. 1.
Niiniaiinoue(aianoeiinoue) oaaee/eaaaony io 8 aei oaeiaiai 10 ?aca AMPS
Aiaeiaiaay nenoaia e io 4 aei oaeiaiai 5 ?aca GSM nenoaiu 2. Oeo/oaiiia
ea/anoai cai?ina, n eo/oa e aieaa iineaaeiaaoaeueiui caoeii eae
N?aaiaiiue n AMPS nenoaiaie 3. Oi?iuaiiia ieaie?iaaiea nenoaiu n
iiiiuueth oie aea naiie /anoiou a eaaeaeii naeoi?a eaaeaeie y/aeee 4.
Oaaee/aiiay nae?aoiinoue 5. Oeo/oaiiua oa?aeoa?enoeee ioaaoa, o/eouaay
aiciiaeiinoue iaiueoaai eiee/anoaa o/anoeia y/aeee 6. Oaaee/aiiue
?acaiai? a?aiy aeey

Portables 7. Bandwidth ii o?aaiaaieth

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