問題已開啟 (普通問題)
3G的工作頻段是多少?
提問者: xionghao  提問時間: 2008-12-30    
 
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問題答案 ( 9 )

不同地區(qū)所分配的頻譜是不同的。而且,不同網(wǎng)絡(luò)運(yùn)營商之間頻譜的可用性差別也很大。目前國內(nèi)好像還沒有具體的規(guī)定吧。在全球的許多地區(qū),新的頻譜在國際電信聯(lián)盟(ITU)定義的2GHz 的IMT2000頻段內(nèi)進(jìn)行分配。根據(jù)ITU的推薦,歐洲將分配1920MHz~1980MHz和 2110MHz~2170MHz頻段用于頻分多址復(fù)用(FDD)服務(wù),1900MHz~1920MHz和 2010MHz~2025MHz頻段用于時分多地址復(fù)用(TDD)服務(wù)。在日本,F(xiàn)DD的分配與歐洲相同,但沒有為TDD分配頻譜#(*$#K:JFD本文來自移動通信網(wǎng)gg1fic3.cn,版權(quán)所有


回答者: pizi     回答時間:2008-12-30 12:21    

90        74        


我國3G頻段分為三段,分布在1880MHz到1920MHz、2010MHz到2025MHz、2300MHz到2400MHz之間。供TD-SCDMA、W-CDMA和CDMA2000使用。hfjouiK:JFD(本文來自移動通信網(wǎng)gg1fic3.cn,版權(quán)所有

回答者: inbud2000     回答時間:2008-12-30 13:42    

71        68        


目前在用得TD-SCDMA得頻段為2010~2025MHz

回答者: liudaxiong     回答時間:2008-12-30 15:56    

67        62        


1880MHz到1920MHz、2010MHz到2025MHz、2300MHz到2400MHz之間3東oitre43K:JFD()$#_本文來自移動通信網(wǎng)gg1fic3.cn,版權(quán)所有

回答者: 張耀海     回答時間:2008-12-30 16:08    

67        73        


2010~2025MHz$#@322K:JFD(本文來自移動通信網(wǎng)gg1fic3.cn,版權(quán)所有

回答者: gongzhao     回答時間:2008-12-31 10:48    

70        70        


書上很詳細(xì) !
af12zcv54K:JFD()$#本文來自移動通信網(wǎng)gg1fic3.cn,版權(quán)所有

回答者: zhangtaoxu     回答時間:2009-01-05 20:23    

70        72        


2002 年10 月,國家信息產(chǎn)業(yè)部下發(fā)文件《關(guān)于第三代公眾移動通信系統(tǒng)頻率規(guī)劃問題的通知》中規(guī)定:主要工作頻段(FDD 方式:1920 ~ 1980MHz / 2110 ~2170 MHz;TDD 方式:1880 ~ 1920MHz、2010 ~ 2025MHz)。補(bǔ)充工作頻段(FDD 方式:1755 ~ 1785MHz / 1850 ~ 1880MHz;TDD 方式:2300 ~ 2400MHz,與無線電定位業(yè)務(wù)共用)。從中可以看到TDD 得到了155MHz 的頻段,而FDD(包括WCDMA FDD 和CDMA2000)共得到了2×90MHz 的頻段。d知1fkjK:JFD()本文來自移動通信網(wǎng)gg1fic3.cn,版權(quán)所有
9西70874*$K:JFD()$#_本文來自移動通信網(wǎng)gg1fic3.cn,版權(quán)所有


回答者: zhanghong1409     回答時間:2009-01-08 12:43    

75        67        
這個應(yīng)該是正解啊
wbbob022  2010-03-30 13:44 

正正解
wudidake87  2010-12-14 10:56 



1880-1920

回答者: liujie_0101     回答時間:2009-01-08 17:47    

69        69        



目前,中國電信的CDMA2000和中國聯(lián)通的WCDMA基于FDD模式。經(jīng)記者了解,現(xiàn)在分配給FDD的核心頻段有120MHz,分別是1920至1980MHz,和2110至2170MHz;在補(bǔ)充頻段分配有60MHz資源,分別是1755至1785MHz,和1850至1880MHz。(哦*&#%K:JFD()本文來自移動通信網(wǎng)gg1fic3.cn,版權(quán)所有

中國移動的TD-SCDMA標(biāo)準(zhǔn)則基于TDD模式,TDD擁有核心頻段55MHz資源,分別是1880至1920MHz,和2110至2125MHz;在補(bǔ)充頻段擁有100MHz資源,是2300至2400MHz。
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