ocdma 中文意思是什麼

ocdma 解釋
光碼分多址
  1. A new type of two - dimension codeword structure of ocdma system and it ' s realization method

    型三角剖分上的雙周期三次樣條函數空間
  2. Opticl encoder and decoder are key components of ocdma

    光編解碼器是ocdma系統的核心部件。
  3. The structure and property of optical encoder and decoder impact the performance of ocdma system directly and judging whether the system could work practically

    光編解碼器的結構和特性直接影響著ocdma系統的總體性能，決定著ocdma系統能否實際應用於全光通信網路中。
  4. At the same time, we will make the experiment research on spread - time incoherent ocdma system

    同時，開展了時域非相干ocdma的實驗工作。
  5. In 3 - d ocdma system, the code sequence for each user is spreaded in time chip, wavelength and space. compared with 2 - d ocdma system, 3 - d system can accommodate more total users and simultaneous users

    三維ocdma系統中，每個用戶碼字序列的光脈沖同時在時間域、頻率域和空間域擴展，三維系統較之二維系統擁有更大的總用戶和同時激活用戶的容納能力，系統性能更好。
  6. A 3 - d code for ocdma system

    用於光碼分多址系統的一種3d地址碼
  7. By summarizing the encoding and decoding technology schemes of ocdma system, researching works are done about two dimensions ocdma system of the wavelength and time in the second section

    第二章首先對一維和二維ocdma系統的編解碼技術方案進行歸納和總結。為使ocdma系統容納更多的用戶，對
  8. 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。
  9. Providing a novel access scheme for solving “ last mile ” wideband access and global person communications. in wireless optical code multiple access ( w - ocdma ) network, media access control ( mac ) is a key issue, which determines network performance 、 bandwidth efficiency 、 complexity and cost of terminal

    無線光碼分多址（ w - ocdma ）接入網中，數據鏈路層的媒質接入控制技術（ mac ）至關重要，它直接影響網路的性能、帶寬利用效率、終端設備的復雜度和成本。
  10. The basic theory, system scheme and key technology of ocdma technology are introduced in the first chapter. the advantages and the future development of ocdma system. are summarized

    論文首先對光碼分多址技術的基本原理，系統方案以及關鍵技術進行了介紹，並對ocdma系統的優點以及發展前景進行了總結。
  11. The researching work of this thesis is mainly about the encoding and decoding schemes of the arrayed waveguide gratings and the bragg fiber gratings systems. firstly, the basic principle, system schemes and the key technologies are introduced in section one. the development, research status and trends of ocdma technologies are also summarized

    本論文的第一章對ocdma系統進行了較為全面的綜述，對光碼分多址技術的基本原理和分類、編解碼結構方案以及關鍵技術進行了介紹，並對光碼分多址技術的發展和現狀進行了概述。
  12. Firstly, the basic principle of ocdma, the basic theory of ooc and the key technologies of ocdma are introduced. the development, research status and trends of ocdma technologies are also summarized. combining with other multiplexing technologies and using fiber gratings as the encoder / decoder are the trends of ocdma system

    論文首先對ocdma的基本原理、光正交碼的基本理論以及關鍵技術進行介紹，對光碼分多址技術發展歷史、研究現狀以及發展趨勢進行總結，指出同其它復用方式相結合的混合全光網路和採用光纖光柵編解碼器是光碼分復用技術最有希望的發展方向。
  13. Performance research of spectrum encoding ocdma system

    光譜幅度編碼ocdma系統研究
  14. Firstly, the spread spectrum codes of ocdma system are discussed

    首先，就ocdma系統的擴頻碼展開了研究和討論。
  15. Construction of two - dimensional ocdma address code and its encoder decoder

    一種二維光cdma地址碼的構造及實現方法
  16. But at present, the researches for ocdma need to go more deep into

    但是目前， ocdma還處于不成熟階段，有待更深入的研究。
  17. In this article, two - and three - dimensional ( 2 - d and 3 - d ) ocdma system are researched

    本文主要圍繞多維ocdma系統展開研究。
  18. Analysis of decision threshold for optical correlation receivers in ocdma system

    光碼分多址系統中光學相關接收機判決閾值的分析
  19. The design of optical address code is one of key technologies in ocdma system

    Ocdma系統中的關鍵技術之一就是光地址碼的設計。
  20. Abstract : analyzes the performance of unipolar ocdma system using optical orthogonal code ( ooc ) considering the dispersion and nonlinearity effect of the transmission medium. theoretical analysis demonstrates that dispersion and nonlinearity effect deteriorate the system performance. the performance of ocdma system assuming dispersion - shifted fiber as transmission medium is very close to the case neglecting the dispersion and nonlinearity effect. assuming rz initial pulse and optical hard limiter are also possible solutions

    文摘:分析了基於光正交碼（ ooc ）的光碼分多址系統的性能.數值結果表明：與以前忽略光纖通道對系統性能的情況相比，在考慮了光纖的色散和非線性效應以後，系統性能有了明顯的下降.給出了一些建議方案來遏制由色散和非線性效應引起的系統性能惡化
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