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1、中國(guó)聯(lián)通ChinaUnicom中國(guó)移動(dòng)ChinaMobile網(wǎng)絡(luò)容量networkcapacity交換容量exchangecapacity擴(kuò)容CapacityExpansion平滑升級(jí)smoothupgrade工作頻率RadioFrequencies接收靈敏度ReceiveSensitivity:數(shù)據(jù)DataOptions傳輸速率DataRate電源部分Powersupply數(shù)據(jù)接口DataInterface天線接口AntennaInterface傳輸速率BaudRate用戶(hù)交互界面UserInterface認(rèn)證Certifications網(wǎng)絡(luò)數(shù)據(jù)傳輸數(shù)率netda
2、tatransferrate聯(lián)通無(wú)限U-Max旗下subordinate品牌trademarkU-Info互動(dòng)視界U-Magic神奇寶典U-Net掌中寬帶U-Mail彩eU-Map定位之星U-Sms聯(lián)通在信應(yīng)用服務(wù)ApplicationService產(chǎn)業(yè)價(jià)值鏈industrialValuechain戰(zhàn)略目標(biāo)strategicobjective渠道channel轉(zhuǎn)型transition/Transformation推廣extension針對(duì)aimat電信telecommunication整合conformity市場(chǎng)滲透率marketpenetrationfactor微
3、觀的microcosmic科學(xué)技術(shù)scienceandtechnology地理環(huán)境geographicenvironment宏觀的macroscopical供應(yīng)鏈supplychain產(chǎn)品種類(lèi)productvariety價(jià)格水平pricelevel銷(xiāo)售方式modesofsale1.PCM原理抽樣量化與編碼:sampling,quantizingandcoding話(huà)路:speechchannel幅值:amplitudevalue抽樣頻率:samplingfrequency抽樣速率:samplingrate脈沖流:streamofpulses重復(fù)率:repetition
4、rate編碼過(guò)程:codingprocess模擬信號(hào):analogsignal傳輸質(zhì)量:transmissionquality數(shù)字通信:digitalcommunication數(shù)字傳輸:digitaltransmission含噪聲的環(huán)境:noisyenvironment傳輸路由:transmissionpath信噪比:signal-to-noiseratio信號(hào)電平:signallevels噪聲功率:noisepower地面系統(tǒng):terrestrialsystem二進(jìn)制傳輸:binarytransmission反向操作:reverseoperation8-位碼序列:
5、8-digitsequence接受端:receivingterminal幀格式:frameformat同步字:synchronizationword實(shí)現(xiàn)這三項(xiàng)功能的方案:theschemesforperformingthesethreefunctions一串幅值:aseriesofamplitudevalues電話(huà)質(zhì)量的話(huà)路aspeechchanneloftelephonequality一個(gè)8位二進(jìn)制碼的序列:asequenceof8-binarydigits理論上的最小抽樣頻率:aminimumtheoreticalsamplingfrequency占據(jù)著300H
6、z到3.4kHz頻率范圍的話(huà)路:avoicechanneloccupyingtherange300Hzto3.4kHz每個(gè)樣值8-位碼:8-digitspersamplevalue汽車(chē)點(diǎn)火系統(tǒng)的打火:thesparkingofacarignitionsystem重復(fù)率為64kHz的脈沖流:thestreamofthepulseswitharepetitionrateof64kHz真實(shí)信號(hào)與噪聲信號(hào)的關(guān)系:relationshipofthetruesignaltothenoisesignal由衛(wèi)星上接受到的信號(hào):thesignalreceivedfromasatell
7、ite一條特定消息中的全部信息:thecompleteinformatianaboutaparticularmessage被傳信號(hào)的波形:theshapeofthetransmittedsignal由傳輸路由引入的衰減:theattenuationintroducedbytransmissionpath將抽樣的幅值轉(zhuǎn)換成一串脈沖的單元:theunitthatconvertssampledamplitudevaluetoasetofpulses涉及到第一路,第二路及其他各路的序列:asequencerelatingtochannel1,2andsoon被稱(chēng)為同步字