3g技術(shù)外文翻譯

1、<p><b>　　附 錄</b></p><p><b>　　一、英文原文：</b></p><p>　　3G TECHNOLOGY</p><p><b>　　Abstract</b></p><p>　　The 21 century is an ages of

2、 the information economy, being the 3G TECHNOLOGY of representative technologies this ages, will be at very fast speed develop soon in continuously creatively, and will go deep into the people's work, life and study.

3、 Therefore, control this technology and then seem to be more to deliver the importance. Now I mainly introduce some knowledge of the 3G TECHNOLOGY.</p><p><b>　　Keywords</b></p><p>　　

4、GPRS, TD-SCDMA，WCDMA , EDGE ,CDMA2000 , WAP , SYMBIAN</p><p>　　3 G, the third Generation, known as the Chinese meaning is refers to the third Generation of digital communication. The growth of the global 3G

5、was rapidly in recent years. From 2002 to 2008, the 3 G operators have been gradually from the original is pale and management to the accelerated development .By June 2008, global 3 G users accumulative total up to 709 m

6、illion, the total 84 countries and regions issued 3 G licenses, including effective certificate for 249 copies. </p><p>　　Our country of 3 G development is relatively later than the advanced countries. In 20

7、09, China was officially forward 3 G time. In the economic crisis of the downturn state, China's ministry of information industry issued three third generation mobile communication (3 G) license for China mobile, C

8、hina telecom and China Unicom . China Mobile use our country with independent intellectual property rights of the 3 G standard TD-SCDMA , China Telecom get CDMA2000 license and China Unicom WCDMA lic</p><p>

9、　　Although the technology behind 3G may seem complicated, the ways in which 3G will affect all of our lives are easy to imagine. Just imagine having a combined camera, video-camera, computer, stereo, and radio included i

10、n your mobile phone. Rich-media information and entertainment will be at your fingertips whenever you want anywhere there is a wireless network.</p><p>　　Mobile communication is moving from simple voice to r

11、ich media, where we use more of our senses to intensify our experiences. </p><p>　　But not all of this will happen at once. 3G is an evolution to a communications ideal that no one completely understands ye

12、t. What we do know is that mobile multimedia will hit the Japanese markets in 2001, and Europe and North America will follow soon after. </p><p>　　3G brings together high-speed radio access and IP-based serv

13、ices into one, powerful environment. The step towards IP is vital. IP is packet-based, which in simple terms, means users can be "on line" at all times, but without having to pay until we actually send or recei

14、ve data. The connectionless nature of IP also makes access a lot faster: file downloads can take a few seconds and we can be connected to our corporate network with a single click.</p><p>　　3G introduces wid

15、eband radio communications, with access speeds of up to 2Mbit/s. Compared with today's mobile networks, 3G will significantly boost network capacity - so operators will be able to support more users, as well as offer

16、 more sophisticated services. </p><p>　　3G - At home</p><p>　　3G is going to affect our home and social lives in many ways. The services that 3G enables will help us to manage our personal infor

17、mation, simplify tasks such as grocery shopping, make better use of our time and offer services that are just fun to use. </p><p>　　Operators will be able to develop myriad new service opportunities to attra

18、ct and retain new customers. Here are some examples: </p><p>　　You're sitting on a train and use this "dead" time to log on to your bank account, check your balance and pay a few bills - all th

19、rough your 3G device. You save time and can be smarter about managing your finances. </p><p>　　On a touring vacation, you arrive in a new city. You haven't made any reservations in advance, because you c

20、an do this when you get there, by using your 3G handset to obtain up-to-date information, including hotel vacancies. </p><p>　　Having booked a room, you can use your mobile to view video clips of local touri

21、st attractions and talk to someone from the local tourist information bureau at the same time. </p><p>　　3G - At work </p><p>　　3G will not just support the needs of businesspeople who travel a

22、lot, but will also help new, flexible working practices, such as home-working and remote access to corporate networks outside traditional working hours. Businesspeople are often high-volume airtime users, so they represe

23、nt a big opportunity for mobile operators. Here are some examples: </p><p>　　At work you receive a message from your "smart" refrigerator at home. The message tells you that certain items need rest

24、ocking and an order has already been prepared for the local grocery store, which you can approve, so that your groceries are ready to collect on the way home.</p><p>　　You are on the road, and urgently need

25、to discuss a draft presentation with a number of colleagues back in the office. Pulling into a service station, you use your 3G device to hold a telephone conference with your colleagues and, at the same time, you can al

26、l view the draft presentation and make changes on line.</p><p>　　A maintenance engineer is repairing some equipment on a client's premises and hits a problem. Using his 3G device, he contacts his departm

27、ent and downloads a demonstration video that guides him through the repair process.</p><p>　　TECHNOLOGY</p><p>　　3G brings together two powerful forces: wideband radio communications and IP-base

28、d services. Together, these lay the groundwork for advanced Mobile Internet services, including personalized portals, "infotainment", mobile commerce and unified messaging -encompassing high-speed data, superio

29、r quality voice and video and location-based services. </p><p>　　Making 3G a reality depends on technology developments in different areas. These include amendments to the radio interface to support wideban

30、d communications and in the core network. Supporting technologies, such as WAP and Bluetooth, also have an important role to play. This section provides a brief overview of some of the main technologies and developments

31、involved. Ericsson supports all of these technologies and has played an active role in their development. </p><p><b>　　·GPRS</b></p><p>　　General Packet Radio Service (GPRS) is

32、 an enhancement to existing GSM and TDMA networks that introduces packet data transmission, enabling "always on" mobility. This means that users can choose to be permanently logged on to e-mail, Internet access

33、 and other services, but do not have to pay for these services unless sending or receiving information. When EDGE is added to GPRS, these data rates will increase up to 384kbit/s. </p><p>　　GPRS will be imp

34、lemented by adding new packet data nodes and upgrading existing nodes to provide a routing path for packet data between the mobile terminal and a gateway node. The gateway node will provide interworking with external pac

35、ket data networks for access to the Internet and intranets. </p><p>　　Benefits: </p><p>　　·Faster data speeds and "always on" mobility </p><p>　　·Almost instant

36、aneous connection set-up </p><p>　　·Connection to an abundance of data sources around the world, through support for multiple protocols, including IP </p><p>　　·A step towards full 3G

37、services. </p><p><b>　　·TD-SCDMA</b></p><p>　　All called Time Division-Synchronous CDMA , this standard is formulated by mainland China alone the 3 G standard. On June 29, 1999,

38、 the China telecom science and technology and telecommunications research institute (Datang Telecom) to the ITU, but technical invention father put forward in Siemens AG. TD-SCDMA has the characteristics of low radiation

39、, known as the green 3 G. This standard will intelligent wireless, synchronous CDMA and software radio today the international leading technology int</p><p><b>　　·WCDMA </b></p><p

40、>　　Wideband Code Division Multiple Access (WCDMA) is a wideband radio technique that provides far higher data rates than other radio techniques available today, up to 2Mbit/s, and highly efficient use of radio spectru

41、m. </p><p>　　The higher bandwidth that WCDMA provides will deliver the full potential of 3G. For example, WCDMA allows simultaneous access to several voice, video and data services at once.</p><p&

42、gt;　　WCDMA is fully compliant with IMT-2000 and is the air interface technology for standards in the 2GHz bandwidth (the IMT-2000 core band), known as UMTS (Universal Mobile Telecommunication System) in Europe and ARIB (

43、Association of Radio Industry Businesses) in Japan. </p><p>　　Ericsson has been at the forefront of WCDMA development. The company delivered an experimental WCDMA system to NTT DoCoMo in Japan back in 1998.

44、 Ericsson has also set up WCDMA test systems around the world. At 2000, Ericsson announced its first family of WCDMA base stations. </p><p><b>　　·EDGE </b></p><p>　　Enhanced Dat

45、a Rates for Global Evolution (EDGE) enables GSM and TDMA operators to offer 3G services using existing network frequencies. By making changes and additions to standardization of evolutionary phases of the air interface a

46、nd the backbone networks, as well as the migration to ALL-IP and multimedia networks. </p><p><b>　　·CDMA2000</b></p><p>　　CDMA2000 is a decidedly efficient 3G standard for the

47、delivery of high bandwidth data and high capacity voice services. The evolution of the cdma2000 standard will enable mobile systems to offer data throughputs of 2 Mbit/sec and beyond. </p><p>　　The higher ba

48、ndwidth that cdma2000 provides will deliver the full potential of 3G. For example, cdma2000 also allows simultaneous access to several voice, video and data services at once.</p><p>　　CDMA2000 is fully compl

49、iant with IMT-2000 requirements for 3G. CDMA2000 will be implemented in the existing frequency bands of CMDA and TDMA at 800 and 1900 MHz, as well as in new spectrum at 2GHz in Japan. </p><p>　　Ericsson is

50、a leader in cdma2000 development, and a key driver in the standardization of evolutionary phases of the air interface and the backbone networks, as well as the migration to ALL-IP and multimedia networks. </p>&l

51、t;p>　　·Bluetooth </p><p>　　Bluetooth is an open standard for two-way, short-wave radio communications between different devices. It marks the end of cables and cords between mobile phones, palmtops,

52、portable PCs and printers, for example. Furthermore, Bluetooth enables information between such devices to be synchronized. Diary information held on a PDA can be updated automatically when within range of a Bluetooth-en

53、abled PC. Bluetooth is also going to be important for machine-to-machine communications - one of the largest</p><p>　　Bluetooth is a key development for terminals and other devices using mobile networks. It

54、is available now for 2G networks and as 3G systems, will play an increasingly important supporting role in the future of mobile communications. Ericsson has already announced Bluetooth devices, including the T36 Bluetoot

55、h phone and a Bluetooth headset. </p><p>　　Bluetooth was originally developed by Ericsson, but is now under the auspices of the </p><p>　　Bluetooth Special Interest Group. It has widespread sup

56、port among telecom equipment vendors, computer and chip manufacturers. </p><p><b>　　·Symbian </b></p><p>　　Symbian is an independent joint venture supported by companies includi

57、ng Ericsson, Nokia, Motorola and Psion. Symbian aims to promote a mass market for mobile information devices in two ways: </p><p>　　·First, through the development of core software, application framewo

58、rks, applications and development tools for mobile multimedia devices (such as PDAs, smartphones and communicators) </p><p>　　·Second, by "evangelizing" standards for the interoperation of mo

59、bile information devices. Symbian's EPOC operating system is already available and Ericsson devices such as the R380 are EPOC-enabled. </p><p><b>　　·WAP </b></p><p>　　Wirele

60、ss Application Protocol (WAP) is a global, open standard that gives mobile users access to Internet services through handheld devices. It enables users to easily access a to e-mail, Internet access and other serwhole ra

61、nge of Mobile Internet and other data services from mobile devices such as smartphones and communicators, and without the need to plug into a separate laptop or data-enabled device. </p><p>　　WAP enables thi

62、s through a built-in "WAP microbrowser" that lets information be accessed direct from a phone, in the same way that web browsers provide access to on-line services via an Internet-ready PC. Typically, a WAP scr

63、een will display a number of hyperlinks to various services or information portals. </p><p>　　As well as WAP phones, Ericsson has also announced a WAP Service Developer's Kit (WapIDE) and the WAP Gateway

64、/Proxy, which bridges WAP applications and services in Internet and intranet environments with mobile networks. In addition, Ericsson provides application enablers, such as Ericsson Localized Internet (ELI) for location-

65、based services, and WAP Application Server (WAS) providing a run-time and development environment for WAP applications. </p><p>　　Ericsson is one of the four founding members of the WAP Forum. Since 1997, w

66、hen it was established, the WAP Forum has gained widespread industry support - hundreds of companies are members of the worldwide WAP Forum。 The latest version of the WAP standard, WAP 1.2.1, has recently been launched.

67、</p><p>　　Our dedicated WAP consutants are ready to assist operators and service providers sharpen their competitive edge. They help today's businesses adapt to the new economy and create cost-effective,

68、 innovative ways to communicate with customers. </p><p>　　What will 3G give us</p><p>　　People will enjoy the 3G time what services it provide, the image of that, 3G is video conference on that

69、plane; 3G is patients receive timely assistance of medical experts; 3G is fans will not miss the NBA basketball game; 3G is to share with friends your beautiful vacation in Hawaii.</p><p>　　· more and m

70、ore 3G video phone </p><p>　　All along, we use QQ, MSN chat with friends remotely. As the mobile data transfer rate, image processing, transmission, mainly the acceptance of such display devices makes mobile

71、 video chat stranded. 3G time to rely on high-speed 3G data transmission network, which 3G mobile phone users can "face to face" conversation. Through mobile video, As far away from the mother via cell phone to

72、gether, were falling through the mobile phone lovers can meet again.</p><p>　　·3G Push into the mobile phone shopping blowout</p><p>　　Use the mobile internet shopping is a new way to shop,

73、 mobile shopping not only will be able to let consumer buy goods but also makes the satisfaction convenient for consumers to pick and choose goods compared with the constant .With the improvement of China's 3G networ

74、k , more and more users will choose to phone shopping patterns. China's mobile phone shop will grow rapidly in a period.</p><p>　　Online businesses not only include clothing, books, cell phones, toys, au

75、dio-visual products and other daily goods put on the network shelf, cars, laptop computers, jewelry and other luxury goods are also options for the list. One need only log out of 3G mobile phone shopping website of produ

76、ct information, we can buy our favorite items. Online shopping is not only cheaper than the mall , better able to send home delivery. If not satisfied can return on schedule, on-line business integrity commi</p>&

77、lt;p>　　·Broadband Internet access to mobile phones to be a "small computer"</p><p>　　Although China has just begun the road to 3G, broadband internet access business has been a bright spot,

78、 we can send and receive voice messages on the phone, write a blog, chat, search, download and so on, as well as top-notch services such as online games, mobile navigation, online chat and so on.</p><p>　　&#

79、183;the key to the Mobile Office-OA system</p><p>　　Although compared with traditional office, automation system greatly improves the working efficiency. However, the limitations of the region's OA syste

80、m is limited to local area network applications, this office brings to enterprises a lot of inconvenience. Mobile office can keep in touch with units and complete work in anytime and at anywhere. 3G mobile phones can dow

81、nload and install office, java and other office software, office software and hardware will be the traditional "compression" in t</p><p>　　·LCD TVs will be included in Mobile TV</p><

82、;p>　　Mobile TV is to use with the operating system and streaming video-enabled smart phones to watch TV business. It is a multimedia that use CMMB technology, whether it is GPRS mobile phone or CD- MA1X phone, need to

83、 be equipped with mobile terminal operating system to install the appropriate player software. TV programs from the corresponding mobile communication company or by the corresponding SP to organize and deliver. Despite t

84、he development of a thriving scene 3G, but because mobile streaming </p><p><b>　　二、英文翻譯：</b></p><p><b>　　3G技術(shù)</b></p><p><b>　　摘要：</b></p>

85、<p>　　21世紀(jì)是信息經(jīng)濟(jì)的時(shí)代，作為這個(gè)時(shí)代的代表技術(shù)，3G技術(shù)將在非?？斓乃俣劝l(fā)展很快，不斷創(chuàng)造性地將進(jìn)入人們的工作，學(xué)習(xí)和生活中深。因此，控制這種技術(shù)，然后似乎更有重要性。現(xiàn)在，我主要介紹一些3G技術(shù)的知識(shí)。</p><p>　　關(guān)鍵字：探地雷達(dá)，TD-SCDMA，WCDMA，邊緣，CDMA2000，桅索制動(dòng)器，操作系統(tǒng)使用的手機(jī)設(shè)備</p><p>　　3G，全稱(chēng)為3

86、rd Generation，中文含義就是指第三代數(shù)字通信。全球3G近年來(lái)快速成長(zhǎng)，從2002年到2008年，全球3G運(yùn)營(yíng)商已經(jīng)逐步從最初的慘淡經(jīng)營(yíng)轉(zhuǎn)為現(xiàn)在的加速發(fā)展，截止2008年6月，全球3G用戶(hù)累計(jì)已達(dá)到7.09億，全球共有84個(gè)國(guó)家和地區(qū)發(fā)放了3G許可證，其中有效證為249張。</p><p>　　我國(guó)3G發(fā)展相對(duì)先進(jìn)國(guó)家比較晚，2009年我國(guó)才正式邁進(jìn)3G時(shí)代，在經(jīng)濟(jì)危機(jī)低迷的狀態(tài)下，2009年1月7日，

87、中國(guó)工業(yè)和信息化部為中國(guó)移動(dòng)、中國(guó)電信和中國(guó)聯(lián)通發(fā)放3張第三代移動(dòng)通信（3G）牌照。中國(guó)移動(dòng)使用我國(guó)具有自主知識(shí)產(chǎn)權(quán)的3G標(biāo)準(zhǔn)TD-SCDMA，中國(guó)電信獲得CDMA2000牌照，中國(guó)聯(lián)通獲得WCDMA牌照。2009年成為中國(guó)3G正式商用年。</p><p>　　雖然在 3 G 后面的技術(shù)可能很復(fù)雜, 但是3 G 將會(huì)在我們生活中產(chǎn)生的影響是我們可以想象的。 僅僅想像在你的行動(dòng)電話(huà)中加入照相機(jī)、攝像機(jī)、計(jì)算機(jī)、音響

88、以及收音機(jī)功能。這樣，無(wú)論何時(shí)何地你都將能夠通過(guò)無(wú)線網(wǎng)絡(luò)獲得大量的媒體信息和娛樂(lè)。 </p><p>　　移動(dòng)通信正在由單一的語(yǔ)音通信向多媒體方向發(fā)展,通過(guò)此途徑來(lái)加深我們對(duì)外界的感覺(jué)。 </p><p>　　但不是這全部都將立刻發(fā)生。至今為止沒(méi)有一個(gè)人能夠完全掌握3G的發(fā)展的進(jìn)程。我們唯一確信的是2001年多媒體移動(dòng)通信將沖擊日本市場(chǎng)，而且歐洲和北美也將很快發(fā)展多媒體通信市場(chǎng)。 &l

89、t;/p><p>　　3G在帶來(lái)高速的語(yǔ)音通路之外還集以IP為基礎(chǔ)的服務(wù)為一身,有強(qiáng)大的發(fā)展環(huán)境。向IP方向發(fā)展是至關(guān)重要的。IP技術(shù)是以簡(jiǎn)單的數(shù)據(jù)包傳輸為基礎(chǔ)的, 可以使用戶(hù)同時(shí)上網(wǎng)，但是不必花錢(qián)除了我們發(fā)送或接收數(shù)據(jù)。 IP 的自然無(wú)連接性可以大大提高存取速率: 文件下載只需要很短的時(shí)間，而且只需輕輕一點(diǎn)就能和網(wǎng)絡(luò)連接上。</p><p>　　3G采用多頻率通信技術(shù),并且達(dá)到 2 Mbit

90、/s 的通路速度。與現(xiàn)在的移動(dòng)網(wǎng)絡(luò)相比較,3G將會(huì)極大的提高網(wǎng)絡(luò)容量-因此將能夠支持更多的使用者, 同時(shí)能夠提供更多復(fù)雜的服務(wù)。</p><p>　　3 G - 在家庭中的應(yīng)用</p><p>　　3G將通過(guò)許多途徑影響我們的家庭和社會(huì)生活。3G服務(wù)將為我們管理個(gè)人信息提供幫助,簡(jiǎn)單的任務(wù)例如在食品雜貨店,如何合理的利用時(shí)間來(lái)提高我們的服務(wù)就是非常生動(dòng)的應(yīng)用。 經(jīng)歷將可以提出許多新的服務(wù)項(xiàng)

91、目來(lái)吸引新顧客留住老顧客戶(hù)。在這里有一些例子: </p><p>　　· 你可以利用乘坐火車(chē)的時(shí)間登錄你的銀行帳號(hào), 檢查你的收支是否平衡還可以支付一些帳單，所有的這些都得通過(guò)3G實(shí)現(xiàn)。你在節(jié)約時(shí)間的同時(shí)整理了你的財(cái)物。</p><p>　　· 在休閑度假中，你倒了一個(gè)新城市。你沒(méi)必要作任何的預(yù)訂，因?yàn)槟憧梢栽诘竭_(dá)之后再做這些，通過(guò)3G手機(jī)你能獲得最新的信息，包括旅館

92、空缺。有預(yù)訂房間,你可以使用你的手機(jī)查閱當(dāng)?shù)氐穆糜蝿俚剡€可以同時(shí)與別人交流旅游信息。</p><p>　　3 G- 在工作中的應(yīng)用 </p><p>　　3G將不僅僅滿(mǎn)足很多經(jīng)常出差的商人的需要,也將會(huì)有助于新興的、輕松的工作，例如你可以在家通過(guò)網(wǎng)絡(luò)進(jìn)行貿(mào)易。商人是關(guān)注電視節(jié)目實(shí)際間最長(zhǎng)的人，因此，他們?yōu)槭謾C(jī)的設(shè)計(jì)者描述了一個(gè)很大的商機(jī)。以下是一些例子: </p><p

93、>　　· 在工作中你受到家中“ 智能 ” 電冰箱的一個(gè)信息。信息告訴你，冰箱中的一些事務(wù)需要更換了，并且這些需要的東西的清單已經(jīng)準(zhǔn)備發(fā)往雜貨店,如果你同意,雜貨店將為你準(zhǔn)備搞所有的東西。</p><p>　　· 你在旅途中,急切地需要與在辦公室中的同事討論草稿發(fā)表。到一個(gè)服務(wù)車(chē)站,你使用你的 3 G 裝置和你的同事舉行電話(huà)會(huì)議,與此同時(shí)，你能看到全部草稿的發(fā)表而且在線上做出相應(yīng)的變化。&

94、lt;/p><p>　　· 一個(gè)維護(hù)工程師正在修理在客戶(hù)提出的一些儀器并且遇到了問(wèn)題。使用3 G 裝置,與他的部門(mén)連絡(luò)，下載的修理程序?qū)⑹痉朵浵髾C(jī)指導(dǎo)他修理。</p><p><b>　　技術(shù) </b></p><p>　　3 G有二個(gè)有利的優(yōu)勢(shì): 寬帶語(yǔ)音通信和以 IP 為基礎(chǔ)的服務(wù)。綜合在一起，這些為先進(jìn)的移動(dòng)英特網(wǎng)服務(wù)奠定了基礎(chǔ),

95、包括個(gè)性化的入口，你的手機(jī)將會(huì)自動(dòng)接收最新的電視信息，提供高品質(zhì)的聲音和圖像。</p><p>　　使3G變?yōu)槭聦?shí)需要依靠不同地區(qū)相關(guān)技術(shù)的發(fā)展。它在改善介紹無(wú)線通信分界面，支持多頻率通信扮演了重要的角色。在技術(shù)支持方面， WAP和藍(lán)牙都有很重要的應(yīng)用。 這一段提初了一些主要的技術(shù)和發(fā)展的簡(jiǎn)短觀點(diǎn)。 愛(ài)立信支持所有這些技術(shù)而且已經(jīng)它的發(fā)展中扮演了重要的角色。</p><p><b&g

96、t;　　· GPRS </b></p><p>　　一般的數(shù)據(jù)包語(yǔ)音服務(wù) (GPRS) 是對(duì)現(xiàn)有的 GSM 和數(shù)據(jù)包傳輸?shù)?TDMA 網(wǎng)絡(luò)的提高, 使之保持移動(dòng)通信的特性。 這意謂著使用者能著夠隨時(shí)登陸查看電子郵件, 進(jìn)行數(shù)據(jù)存取和其他的服務(wù), 但是不用支付這些服務(wù)的費(fèi)用除非傳送或接受數(shù)據(jù)。當(dāng)電子數(shù)據(jù)采集設(shè)備備集成到GPRS中,這些數(shù)據(jù)的傳輸率將會(huì)達(dá)到 384 kbit/s 。</p&

97、gt;<p>　　GPRS可以通過(guò)不斷增加節(jié)點(diǎn)和壓縮節(jié)點(diǎn)來(lái)實(shí)現(xiàn)數(shù)據(jù)包在移動(dòng)終端和網(wǎng)關(guān)中的傳輸。網(wǎng)關(guān)將為英特網(wǎng)和企業(yè)內(nèi)部網(wǎng)絡(luò)提供數(shù)據(jù)交互。</p><p><b>　　優(yōu)點(diǎn): </b></p><p>　　· 在移動(dòng)通信基礎(chǔ)上的快速數(shù)據(jù)傳輸 </p><p>　　· 可以在瞬間建立連接 </p>&

98、lt;p>　　· 提供全球豐富的數(shù)據(jù)庫(kù)資源,支持多種協(xié)議, 包括IP協(xié)議 </p><p>　　· 逐步地走向完善的3G。</p><p><b>　　·TD-SCDMA</b></p><p>　　全稱(chēng)為T(mén)ime Division - Synchronous CDMA(時(shí)分同步CDMA)，該標(biāo)準(zhǔn)是由中國(guó)大陸

99、獨(dú)自制定的3G標(biāo)準(zhǔn)，1999年6月29日，中國(guó)原郵電部電信科學(xué)技術(shù)研究院（大唐電信）向ITU提出，但技術(shù)發(fā)明始祖于西門(mén)子公司，TD-SCDMA具有輻射低的特點(diǎn)，被譽(yù)為綠色3G。該標(biāo)準(zhǔn)將智能無(wú)線、同步CDMA和軟件無(wú)線電等當(dāng)今國(guó)際領(lǐng)先技術(shù)融于其中，在頻譜利用率、對(duì)業(yè)務(wù)支持具有靈活性、頻率靈活性及成本等方面的獨(dú)特優(yōu)勢(shì)。另外，由于中國(guó)內(nèi)的龐大的市場(chǎng)，該標(biāo)準(zhǔn)受到各大主要電信設(shè)備廠商的重視，全球一半以上的設(shè)備廠商都宣布可以支持TD—SCDMA標(biāo)準(zhǔn)

100、。 該標(biāo)準(zhǔn)提出不經(jīng)過(guò)2.5代的中間環(huán)節(jié)，直接向3G過(guò)渡，非常適用于GSM系統(tǒng)向3G升級(jí)。軍用通信網(wǎng)也是TD-SCDMA的核心任務(wù)。</p><p><b>　　· WCDMA </b></p><p>　　寬帶碼分多址接入技術(shù) (WCDMA) 提供的數(shù)據(jù)傳送速率遠(yuǎn)遠(yuǎn)大于現(xiàn)在我們采用的通信方式,提供高達(dá)2Mbit/s的傳輸速率, 大大提高了光纖對(duì)語(yǔ)音信號(hào)的傳輸

101、率。 3G提供更寬的帶寬是3G中存在的巨 大的潛能。例如，WCDMA能夠使語(yǔ)音信號(hào)、視頻信號(hào)和數(shù)據(jù)同時(shí)進(jìn)行傳輸。 </p><p>　　WCDMA完全遵照了IMT-2000提出的2GHz帶寬標(biāo)準(zhǔn)(IMT-2000中心帶寬),就像是在歐洲采用的UMTS(全球的移動(dòng)傳輸系統(tǒng))和日本采用的ARIB(語(yǔ)音信號(hào)工業(yè)標(biāo)準(zhǔn)聯(lián)盟)。</p><p>　　愛(ài)立信在WCDMA的研發(fā)方面走在了前列。公司早在1

102、988年就在日本為移動(dòng)通信網(wǎng)絡(luò)開(kāi)始了WCDMA的實(shí)驗(yàn)活動(dòng)。愛(ài)立信已經(jīng)在全球建立了WCDMA的測(cè)試系統(tǒng)。在2000年，愛(ài)立信宣布了他建立了WCDMA的基站。</p><p><b>　　· EDGE </b></p><p>　　全球革命性的提高傳輸速率將是原來(lái)的GSM和TSMA運(yùn)營(yíng)商利用現(xiàn)有的設(shè)備提供3G服務(wù)。通過(guò)制定新的通信附加標(biāo)準(zhǔn)來(lái)對(duì)無(wú)線通信和網(wǎng)絡(luò)中樞進(jìn)