3Gco
o(sh)(j)ݔ?sh)ęCc(zhn)
댧wSVoWLANM̾W(wng)cƄں
      ȫĹ̶W(wng)jO̰غȫCDMAoW(wng)jOӍĺϲһںϹ̶W(wng)jƄӾW(wng)jOO䡰ޟoԡ簢؁̫^(q)Z_f̾W(wng)ƄӾW(wng)jںWԃCOvum̫^(q)߼DavidKennedyJ顭
      oͨŘI(y)ǘ˜¼g݅ИI(y)~댒r¼g/˜ʵıƴӼҡ糬(UWB)HI(y)eOƳ״ꇠI֮gĠZ(zhn)Ҳˇ@^ֹ
ocƄͨںϴڅ
o(sh)(j)ݔ?sh)ęCc(zhn)
      F(xin)߀īŘI(y)y(tng)ļgډô،rܛQĵһW(wng)jgص˂y(tng)ŽQx֮oW(wng)jͬӵٶֱصƄͨI
      3GʲôҲSǰ3GǔUlͨŵĴ~CDMAǬF(xin)أWi-Fi@ӵğoW(wng)jg՝u(jng)4Gu׃WiMaxe߀TUWBZigbeeȼgڻҕ҂ѽ(jng)oѵƄͨ@h(hun)ԎCDMA^ϡ
ҲSoՓķNogoȡCDMAgɂݔW(wng)ϵľ޴(yu)ݡ
GlobalpressekġӸ߷Փ2006}ӑՓoƄӔ(sh)(j)ęCc(zhn)֙Cһo˜չ_ӑՓcJ飺ƄӔ(sh)(j)ЈͶYѸl(f)չٶȲAڿ졣
ƄӽKPoC׌֙CvC
w˼ƽ_Yϸ͹CSR{OӋ
SiGe SE2545A10ǰģK
 ǷϣHͨ^һIӋһ˽˼s̄ՕՄoͨ^LԒ
    ՄǏsĶ_cʩߴPoCPush to talk Over cellularһIͨͿԝM@Ҫ]пgƣGPRSWCDMACDMA2000W(wng)
CSR˾cw˼댧w˾ǰƄԒa(chn)ṩȫܺ͵͹ĵ{OӋCSR˾BlueCoreܛӲ
cw˼2.5G2.75G3GƄԒƽ_Լi.MXϵБ̎Y
      CSR˾BlueCore4оƬBCHSǶʽ{ܛїBCHS Instant Mobile
SiGe댧w˾SE2545A10 ׿ RF
ǰģK˃ɂȫpll(f)/· (2 x 2.4 GHz Tx2 x 5 GHz Tx2 x 2.4 GHz Rx 2 x 5 GHz Rx) ԝM MIMO Ҫ
MIMO̙Co޵ğoͨӍ¼g
PWi-Fiľʆ
     Soͨżgwٰl(f)չ˂oW(wng)͔ܺ(sh)(j)ʵҪҲԽԽδğoͨϵy(tng)ɂ(zhn)ŵ˥lVЧʡoͨŵĻAg--l֏(OFDM)܉Q˥䆖}ڎ͹ʲ޵r܉򌍬F(xin)˂ڴĸʣ͹޵ğoW(wng)ϵy(tng)Ͳ̫m(MIMO)g܉ڿgЮa(chn)IJŵͬrݔ·(sh)(j)
ԒЎWi-FiǷx҂Wi-FicCԒںϱ϶B(ti)ȣҰWiFiVoIPںϡ
TD-SCDMAcGSMpģ֙Cǰ˵ĶоƬF(xin)
νWiMAXɱ
     TD-SCDMAƄͨŅf(xi)hIMT-20003GPPҎ(gu)ƄͨŇH˜֮һ䪚صļg(yu)҇Ƅͨŷо޴ЈTD-SCDMAƄͨŅf(xi)hǰǘ^ĿǰGSM/GPRS֙CÑȻռ(j)ஔЈ~ԌF(xin)TD-SCDMA/GSMpģwƵ֙CKˌGSM/GPRSTD-SCDMAƽ^ǘO߬F(xin)x͑ǰ
IoɆɱҲҪءڲ WiMAX gr£Ҫ{ͳɱҪmȻWiMAXOͶ
ν֙CܛĸQɱ
lŴǾԜy
      ܛQƄԒҪԪأƄԒܷЈɹPIҪQ֙CǡTa(chn)Ʒ߀ǡζa(chn)ƷʹȽ|Ĺ҂ۺ֙CҪԭ֙Cϵy(tng)ֻ̎Ҫ뵽cͲܛװl(f)}ɱ(jng)AҿҪ֙Ca(chn)ǰɡČfܛϵy(tng)_l(f)ˆTҪ]ԼβһNϳROӋͼܘԴp@ЩLU
Soͨżgwٰl(f)չlV^ߵ{ƷʽõˏVPSKQAM{@Щ{̖һͬc̖ʡ
ʷŴM܊oͨź֙CI
WiMAXĵ•߾ԶMMICŴ
Soͨżgwٰl(f)չlV^ߵ{ƷʽõˏVãPSKQAM{@Щ{̖һͬc̖ʡ
 o 80 ԁ N (silicon germanium, SiGe) gһֱЩ׷ͳɱҪܸͨĸl_l(f)ˆTdȤһN댧wϡF(xin)SiGeѽ(jng)һNНļgl(f)չɞĿǰһƄOMQV֙CoW(wng) (WLAN) {Ȯa(chn)ƷF(xin)ڣSiGe gCDMAGSM WLAN еĸ߹ʷŴ׃l•Ŵ (low-noise amplifier, LNA)
xͱih(hun)ڶr λеđ
NI PXIgğo늽ՙCg
olՙCһO(jin)yϵy(tng)ؓ؟쾀ϽlȻ̖lʽ(sh)ֻxɽյķMвɼSͿԡ
    ͨ/W(wng)jd
 ih(hun)(PLL)VڟoͨڻվеҪ;Ǟl(f)ͽе׃l׃l·ṩһ(wn)ġ•l(RF)ʎ(LO)bPLLܣ߀ڿS·Еr̖ĶrijЩУʹõîԴr^FĶrоƬ
(sh)ٔ(sh)·OӋ̎עλđxFĶrоƬͨnj޶lʷ(ͨmSONET/SDHlʵľ·)Եرrָ֮¡

˾ | V | Ͷ֪ | L | “(lin)ϵ҂ |
Ӯa(chn)Ʒ硷s־ |ԇHgϢԃ޹˾
Copyright©2002 ELECTRONIC ENGINEERING & PRODUCT WORLD. All rights reserved.
ICP060382̖