頻分多路 的英文怎麼說
中文拼音 [bīnfēnduōlù]
頻分多路
英文
fdma-
To utilize the advantages of dsp chips, the system should be computing sources economical. according to digital signal processing theory, the poly - phase fir can help reduce the workloads of the ddc / duc. therefore, adding the complex carrier mixers, the channelization system ( a method of using a single wideband facility to transmit many relatively narrow - bandwidth signals. by subdividing the frequency spectrum used in the wideband channel ) can be formed utilizing the characters of fft
為了使開發出的軟體可以適用於高速dsp器件開發，節省系統資源，課題首先從數字信號處理的理論進行分析，得出可以利用抽樣率轉換的數字濾波器的特點，即多相濾波實現數字上下變頻計算負擔的減小，之後進一步將多相濾波器與頻譜搬移部分結合，通過公式的推導，得出可利用快速傅立葉變換的特點實現多路信號的通道化發射和接收的處理模型。Orthogonal frequency division multiplexing ( ofdm ) is a special case of multicarrier transmission, in which a single high data rate datastream is transmitted using a number of lower data rate subcarriers
Ofdm （正交頻分多路復用）是一種特殊的多載波傳輸方式，由於它使用一系列低速子載波并行傳輸數據，使得傳輸速率得到大幅度提高。Orthogonal frequency division multiplexing ( ofdm ) is a special case of multicarrier transmission, in which a single high rate datastream is transmitted using a number of lower data rate subcarriers
Ofdm （ orthogonalfrequencydivisionmultiplexing正交頻分多路復用）是一種特殊的多載波傳輸方式，由於它使用一系列低速子載波并行傳輸數據，使得傳輸速率得到大幅度提高。Widespread broadband connectivity and the availability of powerful pcs make delivery of video and multimedia content over a network a reality
寬帶連接的廣泛分佈和隨處可得的強大pc ，已經使得通過網路發送視頻和多媒體內容成為現實。And pays emphasis on analyzing the system structure and system flow, the core techniques, the channel characteristic and parameters of dvb - t system. the system adopts some core techniques such as cofdm, a lot of tps ( transmission parameter signalling ) insert and guard interval, and so on. so it can withstand high - level ( up to odb ), long delay static and dynamic multipath distortion
論文首先描述了數字電視地面廣播的需求條件，技術難點和目前存在的問題，並重點分析了dvb - t系統結構流程，核心技術及系統通道特性和參數，該系統採用了cofdm （編碼正交頻分多路復用） ，大量導頻信號插入和保護間隔技術等核心技術，使之能抵抗高電平（ 0db ） ，長延時的靜態和動態多徑失真，有利於數字和模擬電視的混合傳輸，它的多載波調制模式功能和性能在移動和便攜接收、同頻網等方面具有獨特的優勢。The u. s. transmission format is called 8 - vsb ( for 8 - level vestigial sideband ), which is more susceptible to multipath distortion than the european system, called coded orthogonal frequency division multiplexing, or cofdm
美國的傳送格式是八階殘邊帶（ 8 - vsb ） ，這種格式比歐洲的編碼正交分頻多工（ cofdm ）系統，更容易受到多路徑問題影響。Orthogonal frequency division multiplexing ( ofdm ) is a multi - carrier modulation method
正交頻分多路復用是一種多載波調制技術。This system adopts object - oriented technology. it takes full advantage of windows multimedia technology. the audio input signals are programmed by this technology in wavex pattern. in order to process the input audio signals in real time, windows thread technology is also adopted. the thread technology is a " producer - consumer " mode
在軟體上，採用面向對象的編程技術，充分利用windows強大的多媒體技術，對多路輸入信源進行wavex的底層音頻編程，實現了上位機對音源輸入輸出的靈活控制；為了保證音頻信號處理的實時性，軟體上還充分利用了windows多線程技術，採用了基於「生產者-消費者」模式的多線程技術。Experimental result and practice shows it is possible using seismic information forecasting subtle trap. integrated using geology % log, drilling data, specia ! seismic processing technique -, interpretation technique, including high precision horizon calibration technique, 3d seismic visualizing interpretation, seismic coherence analyze, attribute analyze, logging - constrained inversion, time frequency analyze, ann forecasting technique, subtle trap object is identified and interpreted. finally, advantage object of subtle trap in this area is determined
綜合地質、測井和鉆井資料，依靠先進的地震特殊處理和解釋新技術，包括高精度的層位標定技術、三維可視化解釋技術、地震相干技術、屬性分析技術、測井約束反演技術、時頻分析技術、多參數油藏檢測技術和神經網路預測等技術，對隱蔽油氣藏目標進行識別、解釋和成藏研究，最後指出工區內隱蔽油氣藏的有利目標。Optical code division multiple access ( ocdma ) technology possess the characteristics of combating interference, high frequency efficiency, security, and simply network protocol, random access, so it is competitive to apply ocdma to wireless optical access network
光碼分多址（ ocdma ）技術具有的抗干擾能力強、頻率利用率高、保密性好、網路協議簡單、支持隨機接入等優點，將其應用到無線光接入網中，不僅具有cdma技術的優點又保持了無線光通信的優點，實現二者優勢互補。Methods of measurement for radio equipment used in satellite earth stations - part 3 : methods of measurement for combinations of sub - systems - section three - measurements for f. d. m. transmission
衛星通信地球站無線電設備測量方法第3部分:分系統組合測量第3節:頻分多路復用傳輸的測量Due to the data transmission characteristics between tags and reader, space division multiple access ( sdma ), frequency division multiple access ( fdma ) and code division multiple access ( cdma ) are applied in a limited way in rfid system. therefore, time division multiple ( tdma ) has been generally accepted. according to tdma, there are aloha protocol, s - aloha, binary - tree protocol, clipped binary - tree protocol and others
解決這個問題必須要用到多路存取法，針對射頻識別系統中閱讀器與應答器之間的通信特點，空分多路法、頻分多路法、碼分多路法在rfid系統中應用都受到一定的限制，只能應用到一些特定的場合，一般採用時分多路法，按照時分多路法的演算法有aloha演算法、時隙aloha演算法、二進制樹型搜索演算法、修剪枝的二進制樹型搜索演算法等防碰撞演算法協議，分析了各自特點以及存在的缺點。Orthogonal frequency division multiplexer
正交頻分多路復用技術Adsl transmission equipment vendors use either frequency division multiplexing or echo cancellation to achieve this huge gain in throughput
Adsl傳輸設備供應商不是利用頻分多路復用，就是利用回波消除，以獲得吞吐量有大幅度的提高。Frequency - division multiple access fdma
頻分多路訪問Frequency division multiplexing
頻分多路復用Use of one channel for several messages by timedivision multiplex or frequency division
通過時分或頻分多路復用的方法，用單個通道傳輸多個報文。This is the first occasion that w - ofdm - based fixed wireless access system is put to large - scale commercial use in china
這是基於w ofdm （寬帶正交頻分多路復用）技術的固定無線接入系統在中國首次大規模的商業應用。This bandwidth is twelve times greater than that required for ssb fdm, and six times greater than the bandwidth required for double sideband fdm
這個寬帶，比單邊帶頻分多路復用所需要的帶寬大12倍，比雙邊帶步分多路復用所需要的帶寬大6倍Due to a variety of advantages, such as high bandwidth efficiency and excellent anti ? multipath performance, orthogonal frequency division multiplexing ( ofdm ) has received considerable attentions and been widely used in many fields
正交頻分多路復用（ ofdm ）因具有頻帶利用率高和抗多徑能力強等優點，近年受到廣泛的重視。分享友人