頻分多路轉換 的英文怎麼說

中文拼音 [bīnfēnduōzhuǎnhuàn]
頻分多路轉換 英文
frequency division multiplex
  • : Ⅰ形容詞(次數多) frequent Ⅱ副詞(屢次) frequently; repeatedly Ⅲ名詞1 [物理學] (物體每秒鐘振動...
  • : 分Ⅰ名詞1. (成分) component 2. (職責和權利的限度) what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] (料想) judge
  • : 1 (道路) road; way; path 2 (路程) journey; distance 3 (途徑; 門路) way; means 4 (條理) se...
  • : 轉構詞成分。
  • : 動詞1. (給人東西同時從他那裡取得別的東西) exchange; barter; trade 2. (變換; 更換) change 3. (兌換) exchange; cash
  • 轉換 : change; transform; convert; switch
  1. This paper refers to several creation in compatibility with large volume of fed display and conversion of different video signal. it firstly used special central chip al300, designed correlative circuits, successfully developed vga full - color fed console system, compatible with resolution 1280 1024, achieved functions such as multi - video signal conversion and interleaving, met vga ’ s resolution of fed. it firstly designed and fabricated vga interface and separated video interface - - s - video, converting several video signals to 24 bits full - colored digital image signal in fed driving system, achieved separation of luminance signal and chromatism signal, enhanced the bandwidth of luminance signal

    首次採用平板顯示專用控制晶元al300 ,設計並製作了相關配套電,支持的最高解析度是1280 1024 ,實現解隔行和種視格式的功能,滿足了fed顯示屏對vga解析度的要求。首次在基於fpga的vga級彩色fed控制系統中設計並製作了vga介面和離電視信號s - video介面,可以將種視信號變為fed驅動系統可用的24位彩色數字圖像信號,實現亮度信號和色差信號的離,提高了亮度信號的帶寬。
  2. 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析,得出可以利用抽樣率的數字濾波器的特點,即相濾波實現數字上下變計算負擔的減小,之後進一步將相濾波器與譜搬移部結合,通過公式的推導,得出可利用快速傅立葉變的特點實現信號的通道化發射和接收的處理模型。
  3. Fpga and dvb standard are introduced firstly, dvb - c standard and composition of its system are analyzed completely, development of modulator structure and dvb - c digital modulator composition are presented, more over, analysis of respective modular are given. then, principle of dvb - c digital modulator system are presented, they are error control technique 、 mqam 、 nyquist rule and root raised cosine filter 、 window design method for fir filter 、 multi - rate signal processing ( integer interpolating, conversion of fractional sampling, equal conversion of net structure, polyphase structure for filter, poly - phase structure for interpolator, multi - stage implementation of samplying conversion ) 、 distrubited algorithm 、 cic filter 、 dds 、 cordic algorithm

    接著,專門利用一個章節闡述了dvb - c前端調制系統原理,他們了差錯控制技術、進制調制( mqam ) 、 nyquist準則與平方根升餘弦濾波器、有限沖擊響應濾波器的窗函數設計法、抽樣率信號處理包括(整數倍內插原理、數倍抽樣率、網結構的等效結構、濾波器的相表示、內插器的相表示、抽樣率級實現) 、散式演算法、 cic濾波器、直接數字率合成( dds ) 、 cordic演算法。
  4. Through analysising the characteristics of the power system with floating neutral point deeply, the paper puts forward a new plan of single - phase to ground fault line selection on the base of s ' s signal injecton method and gives the hardware and software design. in this design, the high speed sampling and data processing is carried out through using dsp processor ; the large electrice current is drived through the application of a high - performance audio power amplifier and transformer ; the communication between host computer and detectors is realized through rs485 bus technology ; the difference multilevel frequency - selected amplifier is designed and the feeble signal of space is sampled on the base of the theory of magnetic induction ; the interface between dsp and exterior chip and rs485 interface logical is designed through using fpga ; the using of lcd module and keyboard interfacing chip makes the interface between human and machine ; the programme of host computer and detectors is designed through using blocking design method

    在本設計中,採用高速的dsp處理器,實現了對故障特徵信息的高速採集與處理;採用大功率的功放晶元與變壓器配合的方法,實現了大電流信號的驅動輸出;採用485總線技術,組建了裝置主機與探測器之間的主從式通訊網,實現了干擾條件下裝置主機與探測器的可靠通訊;設計了差級選放大電,採用磁感應的方法實現了對空間微弱信號的接收;利用fpga技術,實現了控制器與外設的介面及數字信號的串並;採用了先進的lcd液晶顯示模塊及鍵盤介面晶元,設計了人機信息交互的介面;採用了模塊化的軟體設計方法,開發了裝置主機及探測器的軟體程序。
  5. The second chapter simply introduces the development of alternate asynchronous inverter technology and retrospects some types of energy - saving systems for hydraulic elevators. then the working principles of the project are discussed and analyzed at four different working status, i. e. light load upwards, heavy load upwards, light load downwards and heavy load downwards. and the chapter focus on the introduction of structure design of pump station, calculation and type selection of pump / motor reversible units, research on oil leakage principles of accumulator circuit, design of accumulator - pump / motor pressure - energy transformer and integrated valve blocks, etc. the last but not the least, the electrical wiring of vector inverter control cabin and design of computer control and data acquisition system are introduced

    論文第二章首先簡單介紹了交流異步電動機變調速技術的發展概況,在回顧電梯液壓控制系統節能技術的基礎上,介紹了本課題研製的「採用蓄能器的液壓電梯變節能控制系統研究」的基本原理,析了動力系統在電梯轎廂輕載上下行、重載上下行等四種典型工況下的基本工作狀態和工作方式;詳細地介紹了本課題節能系統液壓動力泵站的結構設計和參數設計,重點研究了液壓動力泵站的結構設計、液壓泵馬達可逆性問題及其選型設計計算、蓄能器迴泄漏油損失機理的研究及其補償裝置的設計、蓄能器-泵馬達壓力能量裝置的設計、功能集成控制閥組的設計等內容;最後簡單介紹了本課題矢量控制變控制櫃的外部附件電氣接線、計算機控制及數據採集系統的硬體設計等內容。
  6. This thesis mainly describes a tesing and consoling kit based on ni " s special virtual instrument software development kit - labwindows / cvi, aming at traditional testing device " s limitation such as high cost of hardware, complexity of construct, singleness of function etc. the tesing and consoling kit can condition the signal intermixed with interfere noise and deal with the collected datum through common signal conditioning ( amplification, isolation multiplex filtering ) -, software calibration digital filtering etc to analyse signal in time and frequency domain

    本文針對傳統測量設備硬體成本高、構造復雜、重用性差、功能單一等方面的問題,著重探討了利用ni的labwindows cvi這一虛擬儀器開發軟體構建的測控平臺,通過通用信號調理(如放大、隔離、、模擬濾波等) 、軟體校正、數字濾波等方法對混雜有干擾的信號進行調理及採集后的數據進行處理,然後進行時域或域的析。
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