【正文】 Differential Frequency Hopping差分跳頻DFTDiscrete Fourier Transform離散傅立葉變換DGDifferential Gain微分增益DGPSDifference Global Positioning System差分全球定位系統(tǒng) DH DataHigh Rate Data 高速率數(shù)據(jù) DHDouble Heterogeneous雙異質(zhì)結(jié) DHCP Dynamical Host Configure Protocol 動態(tài)主機(jī)配置協(xié)議 DHCPDynamic Host Configuration Protocol動態(tài)宿主配置協(xié)議DHTMLDynamic HTML動態(tài)HTML文件 DIAC Devoted Inquiry Access Code 專用查詢識別碼 dielectric test dielectric test 介質(zhì)試驗 絕緣試驗 DIYdo it yourself自己動手作DL Data Link (layer) 數(shù)據(jù)鏈路層 DLCDigital Loop Carrier 數(shù)字用戶線路倍增器 DLL dynamic link library動態(tài)鏈接庫DLLDelayLocked Loop延遲鎖定環(huán)DM DataMedium Rate Data 中速率數(shù)據(jù) DMADirect Memory Access直接存儲器存取DMCDiscrete Memoryless Channel離散無記憶信道DMTdiscrete multitone 離散多載波DNS Domain Name System域名系統(tǒng) DNSDomain Name System Server域名服務(wù)器DoCoMoDo Communication More溝通更多一種移動通訊創(chuàng)新服務(wù)模式DOCSISData over Cable Sevice Interface Specification電纜數(shù)據(jù)業(yè)務(wù)接口規(guī)范DomsatDomestic CommuniSalellile國內(nèi)通信衛(wèi)星DPCCHDedicated Physical Control Channel專用物理控制信道DPDCHDedicated Physical Data Channel專用物理數(shù)據(jù)信道Dpidots per inch每英寸點數(shù) DPN Digtial Packet Network數(shù) 字 分 組 網(wǎng) DPSKDifferential Phase Shift Keying差分相移鍵控DPTDynamic Packet Transport動態(tài)包傳輸技術(shù)。 CWcontinuous wave(transmission) 連續(xù)波 [傳輸] D/ADigital/Analog Conversion數(shù)字模擬轉(zhuǎn)換D/CDown Convertor下變頻器DABDigital Audio Broadcast數(shù)字音頻廣播DAC Device Access Code 設(shè)備訪問碼 DACDigital－to－Analog Conventer數(shù)模轉(zhuǎn)換器 DAC Digital to Analogue Converter 數(shù)模轉(zhuǎn)換 DAFDELIVERED AT FRONTIER邊境交貨DAMADemand Assignment Multiple Access按申請分配多址聯(lián)接DAMPS Digital Advanced Mobile Phone System數(shù)字先進(jìn)移動電話系統(tǒng)DAMPSDigitalAdvanced Mobile Phone System 北美數(shù)字式進(jìn)階移動電話系統(tǒng)DAPDigital Access Protocol數(shù) 字 訪 問 協(xié) 議 DAVData Above Voice (transmission) 話上數(shù)據(jù)[傳輸] DAVIDDigital Audio/Video Interactive Decoder數(shù)字音頻/視頻交互式譯碼器dBdeciBel分貝，表示對數(shù)比例值DBFDigital Beam Forming數(shù)字波束行成dBidB antenna gain relative to anisotroppoc source天線的增益（相對于各向同性輻射源DBRDistribute Bragg Reflection分布布拉格反射DBSDirect Broadcasting Satellite Service直播衛(wèi)星業(yè)務(wù)DBSDirect Broadcast Satellite 直播衛(wèi)星dBWdB power relative to one mili watt相對于1W的功率的dB值DCDirect Current直流 DCADynamic Channel Assignment動態(tài)信道分配DCCH Dedicated Control Channel 專用控制信道 DCCH Digital Control Channel 數(shù)字控制信道 DCE Data CircuitTerminating Equipment 數(shù)據(jù)電路端接設(shè)備 DCE/DTEdata terminal equipment/ data circuit terminating equipment數(shù)據(jù)終端設(shè)備/數(shù)據(jù)電路終端設(shè)備 DCFDispersion Compensating Fiber色散補(bǔ)償單模光纖 是具有大的負(fù)色散光纖,這類光纖是針對已敷設(shè)的1310nm設(shè)計的一種新型的光纖。 CSMFCommon Single Mode Fiber單模光纖 ，常稱為非色散位移光纖，其零色散位于1．3um窗口低損耗區(qū)，工作波長為1310nm（損耗為0．36dB／km）。CPFSKContinuous Phase Frequency Shift Keying連續(xù)相位頻移鍵控CPMContinuous Phase Modulation連續(xù)相位調(diào)制CPTCARRIAGE PAID TO運(yùn)費(fèi)付至CPUCentral Processing Unit中央處理器CPWCircular Polargation Wave圓極化波CQT Call Quality Test 呼叫質(zhì)量撥打測試 CRCall Reference 呼叫參考值CR Connect Request 連接請求CRACircuit group ResetAcknowledgement message 電路群復(fù)原證實消息 CRC Cyclic Redundancy Check 循環(huán)冗余校驗碼 CRCCyclic Redundancy Code循環(huán)冗余編碼CRPContinuous replenishment program連續(xù)庫存補(bǔ)充計劃CRSCircuit group Reset message 電路群復(fù)原消息CS Circuit Switched 電路交換 CSCommunication Satellite通信衛(wèi)星CSACarrier Service Area Or Carrier Serving Area 電信公司服務(wù)區(qū)或營運(yùn)服務(wù)區(qū) 指美國的電信體制，是由多家私營公司競爭經(jīng)營，每一市話公司各有其營業(yè)區(qū)（LATA），在此營業(yè)區(qū)內(nèi)設(shè)有若干中心局（central officE，CO）。一般需要采用外調(diào)制技術(shù)克服。CAC Channel Access Code 信道訪問碼 CADComputer Aided Design計算機(jī)輔助設(shè)計 CAEComputer Aided Engineering計算機(jī)輔助工程CAIComputer－assisted instruction計算機(jī)輔助教學(xué) CAM Computer Aided Manufacturing計算機(jī)輔助制造CAMELCustomized Applications for Mobile network Enhanced Logic移動網(wǎng)絡(luò)增強(qiáng)邏輯的客戶化應(yīng)用CAPCarrierless Amplitude and Phase Modulation無線波調(diào)幅與調(diào)相CASChannel Associated Signaling隨路信令CASConditional Access System條件接收系統(tǒng)CATVCable Antenna Television有線電視 利用通信線路向用戶提供電視節(jié)目等信息的系統(tǒng)。BRBinding Request綁定請求 BRABasic Rate Access基群速率BRASBroadband Remote Acces Server寬帶接入服務(wù)器 BRASBroadband Remote Access Server寬帶遠(yuǎn)程接入服務(wù)器 BrewBinary Runtime Environment for Wireless無線應(yīng)用下載BRIBasic Rate Interface基群速率接口(北美和日本)BS Base Station 基站 BSCBinary Symmetric Channel二進(jìn)制對稱信道BSC Base Station Controller 基站控制器 BSC Base Site Controller 基站控制器 BSID Base Station Identity Code 基站識別碼 BSMAP BS Mobile Application Part 基站移動應(yīng)用部分 BSRBootstrap Router引導(dǎo)路由器 BSSBroadcasting Satellite Service廣播衛(wèi)星業(yè)務(wù)BSS Base Station System 基站子系統(tǒng) BSSAP Base Station System Application Part 基站子系統(tǒng)應(yīng)用部分 BSSGPBase Station System GPRS Protocol基站子系統(tǒng)GPRS協(xié)議BSSMAP Base Station System Management Application Part 基站子系統(tǒng)管理應(yīng)用部分 BT Bandwidth Time 帶寬時間 BTCblock turbo codes分組turbo碼，是turbo碼一個新的發(fā)展方向BTOBlockingTube Oscillator電子管間歇振蕩器BTS Base Transceiver Station 基站收發(fā)信機(jī) C Band4 GHz to 6 GHzC波段（4GHz到6GHz）C BandC BandC波帶 即工作波長在1525～1560nm范圍內(nèi)，帶寬約35nm。注：過去慣稱為誤碼率。 BABooster Amplifier光功率放大器，可補(bǔ)償光復(fù)用器的損耗，提高入纖功率的光放大器。它通常由定位分系統(tǒng)、數(shù)據(jù)傳輸分系統(tǒng)、控制和數(shù)據(jù)處理分系統(tǒng)等組成。 ATUTADSL transceiver unit,remote terminal end ADSL遠(yuǎn)端發(fā)送接收單元 位于用戶一側(cè)的ADSL設(shè)備。（ISO 9545） ASEATAutoregressive Spectral Estimation Acquisition Technique自回歸頻譜估計捕獲技術(shù)ASIC Application Specific Integrated Circuit 專用集成電路 ASKAmplitude Shift Keying振幅鍵控（幅移鍵控）ASKAmplitude Shift Keying,Amplitude Shift modulation 幅移鍵控Abstract Syntax Notation One抽象語法定義，在采用開放系統(tǒng)OSI通信協(xié)議中用來描述抽象語意的一種語言。 APDAvalanche Photo Detector雪崩光電探測器API Application Programming Interface 應(yīng)用編程接口 APOC Advanced Paging Operator Code 先進(jìn)尋呼操作碼 APONATM Passive Optical Network無源光網(wǎng)絡(luò)，一種結(jié)合ATM多業(yè)務(wù)多比特率支持能力和無源光網(wǎng)絡(luò)透明寬帶傳輸能力的理想長遠(yuǎn)解決方案。 AMPSAduanced Mobile Phone System 高極移動電話系統(tǒng)AMPS Advanced Mobile Phone Institute 先進(jìn)移動電話業(yè)務(wù) AMRAutomatic Meter Reading 自動抄表AMRAdaptive Multi Rate自適應(yīng)多速率AMRCAdaptive Multirate Codec自適應(yīng)多碼率編譯碼器ANAccess Node接入節(jié)點ANSI American National Standard Ins