frequency multiplex 中文意思是什麼

frequency multiplex 解釋
頻率多路復用
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  • multiplex : adj. 多部的，復合的，多樣的，多重的；【電訊】多路傳輸的；多路復用的，【植物；植物學】多襞的。vt. ,vi. 多路傳輸，多路復用。n. 多廳影院，多劇場影劇院。
  1. The advantages of using leo satellite are as following : on the one hand the satellite orbit is low, so the transmission delay is short, the power loss is small ; on the other hand the development of cell communication, multi - access, frequency multiplex and etc also provide a technique guarantee to the leo satellite - mobile - telecommunication. so the leo system is considered to be a satellite - mobile - communication system with a great future

    低軌道衛星是一種運行於1000公里左右的高空中的人造衛星，利用leo衛星實現個人通信的優點在於：一方面衛星的軌道高度低，使得傳輸延時短、路徑損耗小，多個衛星組成的星座可實現真正的全球覆蓋，頻率復用更有效：另一方面蜂窩通信、多址、點波束、頻率復用等技術的發展也為低軌道衛星移動通信提供了技術保障。
  2. 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、多路轉換、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，然後進行時域或頻域的分析。
  3. Methods of measurement for radio equipment used in satellite earth stations ; part 3 : methods of measurement on combinations of sub - systems ; section 4 : measurements for frequency division multiplex transmission

    衛星地面站用無線電設備的測量方法.第3部分:分系統組合件的測量方法.第4節:分頻多路傳輸
  4. Methods of measurement for radio equipment used in satellite earth stations. part 3 : methods of measurement on combinations of sub - systems. section four : measurements for frequency division multiplex f. d. m. transmission

    衛星地面站用無線電設備的測量方法.第3部分:分系統組合件的測量方法.第4節:分頻多路傳輸測量
  5. To require multiplex licensees to encourage video cassette recorder ( vcr ) users to make use of the audio - visual inputoutput to replace the radio - frequency ( rf ) connection ( paragraph 4. 9 )

    規定數碼頻道持牌機構鼓勵卡式錄影機用戶改以聲頻視頻輸入輸出端取代射頻接頭用以接駁電視機（第4 . 9段） 。
  6. In the first place, start with theoretic model of distributed fbg strain - sensing network, sensing principle of fiber bragg grating is analyzed and sensing model created. on the basis of analyzing advantages and disadvantages of several familiar multiplexing and demodulation techniques, a mixture multiplexing method that combines optical frequency domain reflectometry ( ofdr ) and wavelength division multiplexing ( wdm ) is proposed to address fbg sensing array. at the same time, tunable narrow - band light source, which is composed of wide - band light source and tunable optical filter, is adopted to demodulate multiplex signals

    首先，論文從分散式光纖光柵應變傳感網路的理論模型入手，分析了光纖布拉格光柵的傳感機理，建立光纖光柵應變傳感模型；在分析比較了常見幾種復用技術和信號解調技術的優缺點基礎上，提出應用光頻域反射復用技術和波分復用技術相結合的混合復用方法來解決光纖光柵應變傳感網路的尋址問題，採用由寬帶光源和可調諧光濾波器組成的可調諧窄帶光源來解調復用信號，通過理論分析和實驗研究證實了系統方案的可行性。
  7. Finalise the frequency coordination, work out a workable frequency plan and have a clear knowledge of how much capacity are available before setting up criteria and inviting applications for multiplex, programme provider and additional services licences

    港府應落實頻譜協調，制定可行的頻譜規劃，以及在推出數碼頻道平臺、節目供應商及額外附加服務牌照和訂立準則前，清楚知道可使用的頻道容量。
  8. Orthogonal frequency division multiplex ( ofdm ) is a new technology that transmits data in at a high speed on wireless channel

    正交頻分復用（ orthogonalfrequencydivisionmultiplex ， ofdm ）是近幾年興起的一種在無線通道上實現高速數據傳輸的新技術。
  9. Uestc is in charge of the tdd downlink that bases on fpga. ofdm ( orthogonal frequency division multiplex ) is the key technology of b3g system

    現在已經進入項目的第二個階段，電子科技大學負責b3gtdd方式的下行鏈路設計，重點是基於fpga （現場可編程門陣列）的實現研究。
  10. Methods of measurement for radio equipment used in satellite earth stations - methods of measurement on combinations of sub - systems - measurements for frequency division multiplex f. d. m. transmission

    衛星地面站用無線電設備測量方法.第3部分:分系統組合件測量方法.第4節:分頻多路傳輸測量
  11. Initially, pdh was introduced to improve and replace the obsolete analog frequency division multiplex ( fdm ) system. however, it was soon found that pdh had shortcomings such as difficulty in management, high construction cost, limited applications and lack of connectivity standards at the optical layer. thus, in the early 1990s, synchronous digital hierarchy ( sdh ) was introduced in the transmission system

    Pdh最初引入是為了改進和替代老式的模擬頻分復用器系統，但很快被發現pdh管理困難、造價高、應用范圍窄，且缺乏在光層面上的連接標準，因此90年代初期， sdh （ synchronousdigitalhierarchy ）標準被首先引入了傳輸系統。
  12. Multicarrier wireless communications have been widely investigated in the past decades. recently, two - dimensional spread spectrum ( 2d - ss ) system has drawn a lot of attention because of its full utilization of spreading characteristics in the frequency domain and time domain. compared with multicarrier code division multiplex access ( mc - cdma ), 2d - ss system can effectively mitigate multiple access interference ( mai ) due to spreading in the time domain

    當前多載波無線通信技術得到了廣泛的研究，二維擴頻通信系統是近年來提出的新的擴頻通信方式，由於二維擴頻系統從時域和頻域上分別對數據信號進行頻譜擴展，因此它同時具有時域擴頻和頻率擴頻通信系統的特點，是對傳統的一維時域直接序列擴頻和多載波擴頻的推廣。
  13. 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。
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