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ڵλãֻѧУ
عйֻչʷ
2009-03-30 13:26йֻԭߣ
Ƕ֪ǰģ籨Ī˹ģ绰DZģжֻ֪˭ģʲô㲻֪ҪΪ󲿷˸һֻ֪ķˣ١(Marty Cooper) λʮĬĬż֮λ

1973꣬һΪߵͨϵͳרʱڵ豸Ħȫλͨƶ豸绰(һֻͨǴڱʵҹһ)ԷʱҲƶ绰δɹҴ绰˵ǣһЯʽѵ绰ͨͲͷġҧгݡȻѾ൱ò

ʱգֻӰǵĽʽʹþ벻ٳΪ⡣ҪķˣΪʲô̫Ϊ֪أ

룬ԭҪڣſƼĽȥָӢʽΰԽԽټһƼƷз벻һŶӡֻڵŶӣĦ˾Ҫ˵ֻķչʷҲòƪ̸̸Ħ˾

Ħ˾ԭӶ칫˾Galvin Manufacturing Corp 1928 ꣬ɴʼ֮һı.ӶĵģĦƷơĦһ Motorola ǰĸ Motor ʾola ܶƷϲõĺ׺ɿڿ Coca Cola սǰѾʶߵͨŵҪԣʼƱЯʽͨŹߣԼƳһWalkie TalkieSCR-194 ǷdzأáĦһЩʦо1940꣬ĦƳսı SCR300һɵгĸƵƵͨ豸ʮЧͨѶʮң㷺Ӧͨš1942 ꣬Ħ˾ٽƳʽĶԽHandy TalkieSCR-536 ĹڿشͨŷΧһ룬ֻסʹˣʱͨװҲ߳һءһϵо豸ԿĦߵͨŷʵǿĵƵ߼ġͬʱΪŵĹӦ̣ĦƷȶԺ³ԣRobustnessܺáij̶ֳϽĦƷĻ񣬺ܶĦIJƷȻˡҾ౨һĽҰ˳ҶóֻȣֻĦֻܴȥǣܶ˫нעؼƷʹĦҵϵԶŵǺǵȾ֡

սĦΪƷԽԽһ˵ͨžȻ뵽ĦֱʮǰĦһֱ¢гӶԽڵֻ󣬵ʮйһԪһŵ BP ˾ƼӶ칫˾ǣ1947 깫˾ɴĦɴ˿ɼĦͷ֮졣

Ӷս󵽾ʮԽĦĦģͨŷκι˾޷ļƣҴһͨŽͨһͨõķ෽Ϊߵ·ӣ˫绰ߵ˫ֻ绰 WIFIֱ֡ʮǰAT&T һֱ֮ͨRCA ߵͨŵϴ󣬶ĦDz۲۵˫ͨŵİǴǰһڿԿĦĺҵ񶼺˫ͨйء

Ȼ AT&T 绰Ħֻ磬Ǵ֪绰ֻ绰¡ AT&T ͨţԾػִͨšƶ绰ʱAT&T ԤƵ 2000 ȫ򲻳һûƱȺ 2000 ʱʵĿСһٱԣAT&T ȻصƶͨϡĦ෴ͨϲΪȻѺƶͨϣ쵼ƶƶͨŵij

ʮĦƶͨšźŴͼϼǿ playerܿɹǣIJƷáʮĩĦԽԽͿڸΧĴֻͰϵͬͨκͬƷġ

ֻݱʷУԼĦĦķչ˥˵㼣

3Gʵǵ˼õGSMģڵڶȻҲвͬĽз˵GSMģǵڶѴGPRSģ2.5Edgeģ2.75ЩǡɽկĽзй½ЩѧͿлһֱġ4Gֻ֮ƫƫ쵼õоˡû4Gĸ

һģ1Gˡһֻ1Gָģƶ绰Ҳ20Ͱ˾ʮӰƷгֵĴƳĦ˾ CooperʿڵʱĵƺģƼҪ˶ߺͼɵ·ķչ״ȵԼֻķֻܳΪƶ㲻ϱЯܶ˳ƺֻΪשͷǺڽյȡ

Ϊƶͨŵ쵼ߣĦȻ¢˵һƶͨгһƶͨǻģźŵģ߼ģźŴˮƽ˲ƷĺûƷʽÿǡڼ棬ûй˾սĦˣĦֻȻĹʱйһõֻҪԪȻռٷ֮ʮг˾ҪĦֻܼϣһˡ

ڵڶƶͨŸտʼʱŷˡŷ˸ֻɢˣڼϺѵ⡣ʹһͬҵ׼Ҳռʵ PAL ʽʮŷ޶µʶԽԽǿͬʱȡ˸ΪսʧܽѵԼǿڲĺڵڶƶͨϳԽ

1982 ŷʵίԱ European Conference of Postal and Telecommunications Administrations (CEPT)ƶͨŵı׼ Groupe Spcial Mobile GSM ׼ŷְijΪ Global System for Mobile communications , ˺ܶԶﴫΪ GSM Ǻߵд1989 ꣬ñ׼ύŷ޵ű׼֣ڶΪŷ޺Ϊĵڶƶͨű׼GSM ļʱֶַTDMAÿƵʾȵطָ˸ʮֻûÿûռð˷֮һŵʱ䡣עͨʱֱӵļЪʱʵֻܳĺͿԼûһŵGSM ʵּ򵥣ڳΪŷޱ׼ĵڶ꣬ 1991 ꣬ɰźһҷ˾˵һ GSM ƶͨ󣬰йڵʮҲ GSM ׼죬GSM ռֻû 80%ݳƴ 20 û

ŷжͬʱ˲ûţƺŷ˸Ŭŷֻһ׼ֻŷ˿֮һȻͨŵı׼ GSM һǻ TDMA ı׼ǺȽֶַ CDMA ׼Ժйٽ CDMA Ͳ׸ˡͲ˵ˣעڵڶƶͨű׼עʧܡ

ڱ׼֮ϵʧܼӰĦֻľȻڱ׼ʧܲζĦֻгϻʧܣӵκα׼ǹ˾ֻгһϯ֮ءĦʧȥֻгͳελԭ򻹱ҡ޷ܵ˵׽ŪҲΪء

ĦûпֻؽģֻǺܲԸ·ΪһƶͨŵߣĦҪܵӳģֻڣƳֻռΪܲϣԼԼĹطģֻ͵ڷѾɳĽ󣬶ԽۺŵǵĹ˾һͬ㿪ʼڸտʼʱֻԶĦשͷСĴ󣬸ʹĦ߹ģֻڡд˾һĦҲǮIJɤ󣬿ֻIJŵȻ׸ǹǮģֻţˣĦȻֻзϲ󣬵ǣչһƳָСɵֻʱĦŷԼ˰ġ

ȻĦгƸ벽˵ӦòѣǣĦһʹӦµгģͨ豸гϣռҪλã棬緽ԣ۶ҪģӼ̶ܴϿۣгĹ˾һϡĶ֪豸粥ŻӲ첻Ǻܴ󣬶ģⲿֱȲͬҵIJ֮ձ SONY ȷ Harman Kardon Infinity ָȡĦڲܳʱҲֱ죬һֱռֵӼռͳελĽ죬֮ڼϵIJʵСһԶԶûѡѡijƷƵIJƷ෴ܡɲԡ۵ȷǼطȼҪЩ棬ĦԶԶȲŵǺ޵Ķ֡зһЩѣܿŵǺǵȹ˾ǻһǻɫһֻǣͨûĺʡ

ƽؽĦֻȵġÿϸڣãϸڣоٸӣĦһר̫ܲΪ֪ڶĻͨʱԸûԶֱзЧ˱ͨĿǰѾ뵽˵ڶڶMOTO֮Ӳģ飬õӲģԴ洢ļ׼ȷѸٵ˥ֻЧϢʱܻûĻֻ̬ͲͨЧȷͨͬʱּӻЧͨһܹڰĻʵͨй¶ΪϸСĸƣĦºܴĹ򣬶ֻ׷ˡǣޣֻһ绰Ǹͨŵƽ̨һ֣ʯΪݵеǰŷ˵ȣʵΪ֧塣ϣŵǺΪ׵á

1G2Gʱˣƺý3Gˡǽ3G֮ǰһδ˵˵ĦġҿǼƻġҿֻ˲ֻ࣬ʷעҪҪһʡ

Ҷ֪õֻҪһѻվͽźŵģûվĵطֻȻʧȥáǣʹĦġҿֻȫκεطͨҶǵȥ봨ɣʱߵ绰·٣ֻĻվ٣ͨжϣܶ޷ϵ

봨֪Դ봨48Сʱǵ绰⣬ֻ򲻳ȥ봨ί쵼ͨǵ绰봨سСʱ˶ţûκýұΪֻһǵ绰ûֱ֤ڶͻIJԱЯǵ绰ȥšÿ˶һ̨ҿֻϢԴ˵IJȺҲ׼ȷоԮ

ҿǼƻһĦ˷ܲѵ뷨Ե뷨ӺζĦĹʦ•ٸ˵ڼձȺȼʱıԹ˵޷ֻϵĿͻصԺ󣬰ĦɣݹͨСʦ뵽һҿǽ77ŽɵȺûκεطԴ绰ڽԪҿ 77 ӣƻͱΪҿǼƻȻǵ 66

ǸõĴ𣿾⵽ٸͷ˾ķһƻȴõĦܲ޲•߶ĵ֧֡޲أԼĶӿ˹ •߶ģΪļˣ˵ҿǼƻĦ߳ʾо޴DZܣɷĦĹʦ˵ҿȺսһξġս50ԪĴ1998꽫ҿ״Ͷʹá

һdzΰǰļƻļص֮ͨĴʵȫͨţ൱ڰѵƶϵͳᵽϡӼҿϵͳ൱˲ģǼ·ڼأ66 Ҫһ㣬ҪײѶȺܸߡӹϽһĶСƷѵȹǶڸͨġֶƷٺӪܴ鷳͹ĿǰʹõͬͨϵͳȽƣȣΪֻͣмٹϢСſʵֻǵֱͨšڵκֱֻܺͬͨţڶڲҪרŵĵվڵκεصͨš 1991 Ħ˾˺üͶʹ˾ʽˡҿǼƻ1996 һҿ죻

1998111գڽ˺1.8ԪĹ֮ҿǹ˾չͨǵ绰񡣿Ļʽϣͳ•ҿǴ˵һͨ绰绰ļ۸ÿ3000Ԫÿӻ3-8Ԫȴ˲޾ɥ19994£˾ֻ1û΢΢ÿǧԪĴϢ˾˾޴ѹ֮С4ڹ˾伾Ȳ񱨸ǰ죬ϯִй˹̹ŵְ붭»սϷ˷硣˾ڲһλԱԼ•ɭѸٽ˹̹ŵΪʱϯִй٣ӰȴѾ

19996£ҿǽ15Աλ˹˾ӪսԹ滮ľ8£ûֻ2ͬҪ52ǧȥԶ1999813գ壬Ƿ15Ԫ֮ҿƲ롣

2000 3 18 գҿǹ˾ʽƲҿdzǡ66 Լ˼꣬ 2001 걻һ˽ļ˾Private EquityǧԪĵͼ¡

ҿǼƻͨʷһǣһĹ£A Beautiful StoryĦ˾ܴ似ȫ򡣸üƻһ¯˵Ĺ㷺עĿҲӮ˷ͶʼҵĦΪԼóʮԪͬʱƵĴͶʹ˾õʮԪӶ󽵵ԼķաǣҵϣĦúܲɹȣгڿ⣬ɱߵûܴﵽԤƵӯĹģɱߵԭǼѡʧɵġĦһ˲ļ˾ڼǹżáҿǼƻڼױȵģǣڳǰгļ³ɱߣάҲǾ޴ġ⣬Ͷı׶Ŀĺ͹ԳǾͶΪջͶʣ罫ҿϵͳͶãʱϵͳͨĿɿԺȺܲݴҲ 2.4Kps ˳˴绰ûκ£ʹDZڵûʧſҿǼƻ̫ǰˣҵǰȣȫֻһûгķȥֹ۵Ԥƣйʮںҵϡҿǹ˾ܶ࣬յֹͣֹɶͶʣ¹˾ڹ̵ͣ

ڣȻҿֻԱҿǡҵҼǮ116֮䡣˵ֻڹҲȽϳضҰ̽յȺּۡݳƷͨڣ޸ˡ

й3Gշţԭһϣڵ֮2009귢ˡܹ3ţ33GʽͬʱŸ3Ӫ̡

йƶTD-SCDMA
ͨ:WCDMA
ţCDMA 2000

˵TD-SCDMAɣʵֵôģdzйɫĶTDSCDMAĺΪʱֶַͬ롣TD-SCDMAȷΪ׼ı׼й⣬ûһҲá

TD-SCDMAһֱ鲻ϣϲרҵʿΪƭ֡Ϊѧѧĵʽоüɹġ١Ŀǰ÷Ҫڴƹ˾С

ϱձ⣬ϣѧҲɸüǴߡ弼ĻΪ¢Ĺߡ

֤ľǵ߱׼WAPIijЩ漯ŵƶ£ѹҪǿˣǸϣ֮ѹ߲㻹ǽͣˡ

Ҳһ£ͣWAPIǻı̰ڹȥоСͨUTStarcomʲôļ۸CDMAȵȡֻҪ¢ϾζŸ֮⣬ζҪ⵽漯̰

죬ǿ100Ԫ·50ԪʵWiFiһWAPIйһͳºĽ

мѧߵָTD-SCDMAȻǴġй֪ʶȨʵϵĺרdzϮij켼ӵеרҲ10%ļȻգ2000㵽3Gòٳʱйƶ20084²Ŷ̲⣬û뵽Ȼ˴⣬ûձ鷴Ӧ縲DzȶԸͬʱ20084£ǷԱµĹʵĿ̨ұΪTDоƬʼҵĿϢƼɷ޹˾ԭǡ׼ĵһ3G TDоƬϢƷƹɷ޹˾

Ͷ˵۾±ЩСϰҪѩĶ࣬ô꣬ԼԼڴȥTD-SCDMAսϣûмúܵԸɵġ˼ǹҵǮҹ˾ĵգʾͶ߶TDǰIJ㣬ʾTDIJҵΣء

ȻĿǰTDIJҵǼʵʱʵԶԶ׼ȻʱʵУйƶһӾͿԼڣǼܷڳʱʱͳˡ˵ЧĶն˺豸ֵûɵģϾϰտɲԸȥ߼۵йͨCDMAֻȥһв־ȫ¢ϵTD漯ŸԵĹϵ

ƶǹӪ̣TDӪ֮DzġǣܷӪɹÿô֧֡ˡһմ󲿷ַTDʿжϡɡ

˵˵ͨWCDMAǹˮֻϵȽϴ

1995719ͨڱϺݿͨGSMƶ绰ҿʼGSM羺Ͱѻѽȥˣ߲ϵõʵݡǣ20021йͨCDMAͨӴˣйͨGSMͶ𽥼٣GSMźƶIJԽԽ󣬵2008ʱͨƶͲһˡ

200862գйͨйŶCDMAҵתõĿЭ顷йųCDMAҵܶԼΪ438Ԫͬʱͨšͨʱ200862żŶCDMAתõĿЭ顷żųCDMAʲܶԼΪ662ԪӵΪ1100Ԫҡ

20081015գйͨйͨʽϲ3Gշŵʱ򣬺ϲͨõһWCDMAաţͨCDMAȡӪƶ绰ɣͬʱõһCDMA2000ա

WCDMADZȽϳļۺŷѾҵӪĿǰȫ96%3GӪӪWCDMAWCDMA HSPA 汾ٶȿԵ14.4MĿǰȫ138һ3GյӪ133ѡWCDMAơңնַֻ֧棬Ŀǰ֧WCDMAֻdz࣬ŵǵȴ󳧼Ҷкܶ3Gֻ֧WCDMAġ򵥵˵ֻҪ֧WCDMA 2100Ķ֧йͨ3G 磬HSDPAʹָ֧ٶȣ߸򵥵㣬ֻҪĿǰи߶ֻCDMA 2000/1XȫWCDMAġ

йԼTDչһֱ˺󣬼֮3GӪ漯ŵľҶҹ3GһֱҪҡ

йľйɫǣ֪ΪƽTDWCDMAǷTD˶WCDMAһֱʴѹ̬ơֻйڵеĶȥ3Gģ飬һȤˣйͨڲֳѾڲWCDMAԷźţй½ȴûһлWCDMAֻҲ˵ŷˮ߸ˮͨۿ5·ݾҪȫźţȴûһ԰ڵӪҵ۵ֻˮ˽ǹȥεƶȡεĶģʽεΪѵˮڵĿ͹ʵĿǰˮ󲿷ͨڡ˽أڵطĸֳϵıӳڵطΡ

ˣǽδҪʹùȽļѻתͨWCDMA磬ĿǰֻѡWCDMAˮֻֻҪ֧WCDMAֻͨ3G翪ͨ󣬾ͿԲûֱʹͨWCDMA磬һ㣬ͨȡƵġ

ǣεȻƽ⣬ͨWCDMAȻãǴӹȥͨCDMAնгϣӵȽCDMA2000ͨչ˲ƶ1/20ûͨڲĹӪɡ

˱߾ͨҪؼǿ̬ȣĿǰͨɼήҲĿǰTD漯ռݾԵƣѹƽԴͨWCDMAҪ֪ɼܷӳ⣬ͶСڻνۻûжڲƵ̰գҲĹƱġ

õCDMA2000ļĿǰҪͨƣȻ10ӪȺȽӹɵģڸͨר¢ϣüǰáCDMAйǷdzӵԭ򣬶ǿʵӴٽĽǶȳijЩ˴ڵҵ濼ţȫڳWCDMA϶Ӫ̳־ľ棬DzѶΪ֮Ҳӳ¢漯ŲŪµıʵ

Ŀǰ£

TD-SCDMAйƶĿǰȫ10ӪйƶĹ滮6·ݽȫ38зźš
WCDMAйͨĿǰѾȫڲԤ5·ݸпá
CDMA2000йţ:ȥ12µ3£ֳпͨ3GӪԤ6ǰȫһ߳пͨ

ڵľ߲ϣ뾺ͬʱֲܵԭиֵߣнʽֱǿͨӪ̡ٳĿǰڹ̽ڲֻͬʱзоƬ̴󶼱ԼWCDMAгTDCDMAֱ̬ȣйƶйŲֻԼ̡




ĵַ:http://www.cnonline.org/2009/article/11133.html

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