頻分多址 的英文怎麼說

中文拼音 [bīnfēnduōzhǐ]
頻分多址 英文
fdma freqency division multiplex address
  • 頻 : 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 : 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
  • 址 : 名詞（建築物的位置; 地基） location; site; ground; foundation
  1. Delay analysis of self - organized tdma vhf datalink

    自組織時分多址甚高頻數據鏈的延時分析
  2. The videos, voices, data combined traffic and high speed data are becoming more and more predominent in the future, and how to efficiently transfer this multi - medium integrated - data is one of the researcher ' s interesting field. the cdma system, which has striking advantages of anti - multipath fading, soft capacities and large capacities over fdma and tdma systems, has been focused by all of the countries

    未來信息社會中，圖象，話音，數據相結合的多媒體業務和高速數據業務量越來越佔主要地位，如何有效地傳輸這種多媒體數據，已經成為移動通信中的研究熱點之一。擴頻技術由於具有抗多徑，軟容量和時分多址與頻分多址更大的容量和優勢，而受到各國研究者的重視。
  3. Direct sequence - code divition multiple access ( ds - cdma ) technology is achieved easily and used widely at present its receiver capability is confined by two factors, one of which is the multiple access interference ( mai ) which makes the capacity low, another of which is the near - far problem

    直接序列擴頻-碼分多址（ ds - cdma ）技術是最易實現、也是目前應用最廣的一種方式，它的接收性能受到兩個主要的限制：一個是多址干擾造成的性能下降；另一個則是遠近效應問題。
  4. One of the important development emphases is to explore the technology and application of the vhf ( very high frequency ) data chain on the basis of tdma technology

    其中一項重要的發展重點是開發基於時分多址（ tdma ）技術的vhf甚高頻數據鏈的技術和應用。
  5. Spreading codes ensure the mc - cdma a multiuser system

    擴頻碼保證系統為一個碼分多址系統。
  6. Cdma is a kind of advanced wireless spread spectrum technique

    碼分多址技術（ cdma ）是一種先進的無線擴頻技術。
  7. First of all, correlation properties of orthogonal variable - length spreading sequences are analyzed and new closed - form expressions of mai of the cdma systems are derived in terms of aperiodic partial correlation of variable - length sequences. then, the self - interference ( si ), mai and bit - error - rate ( ber ) performance of the desired user in a multi - rate cdma system are analyzed

    本文首先分析了正交變長擴頻序列的相關特性，導出了以變長序列非周期部分相關表示的cdma系統多址干擾（ mai ）新的分析表達式，並分析了多速率碼分多址系統中，期望用戶的自干擾（ si ） 、多址干擾和誤比特（ ber ）性能。
  8. In code - division multiple - access ( cdma ) systems, the auto - and cross - correlation properties of the spreading sequences employed play an important role on the level of the self - interference ( si ), multiple access interference ( mai ) and adjacent cell interference ( aci ), and therefore directly influence the performance and capacity of the systems

    在碼分多址（ cdma ）系統中，擴頻序列自相關和互相關特性的好壞在很大程度上決定了系統自干擾（ si ） 、多址接入干擾（ mai ）和鄰區干擾（ aci ）的大小，從而直接影響著系統性能優劣和容量大小。
  9. Code division multiple access ( cdma ) communications systems being possessed of the merits of great capacity and soft hand - off and so on must have taken a significant role in future wireless communications systems. because pn sequences used in communications systems are been vertical completely, when numbers of user are more, there are multiple access interference ( mai ) in cdma and serving quality in communications systems is reduced

    碼分多址（ cdma ）通信系統以頻譜利用率高、系統容量大、頻率管理容易，軟切換、移動臺發射功率低、通道的傳輸速率高等優點代表了新一代移動通信，在未來的無線通信系統中必將扮演極為重要的角色。
  10. 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。
  11. The general requirement of communication system and the application potential in secure communication are expatiated. the chaotic secure communication methods home and abroad are also summarized, including chaos spread spectrum communication, chaos key - shifting, chaos parameter modulation, chaos masking, chaos cdma. the exiting problems and development direction are also pointed out respectively

    介紹了混沌學的發展過程和意義，闡述了通信系統的一般要求和混沌在保密通信中的應用潛力，綜述了國內外現有的混沌保密通信方法，其中包括：混沌擴頻通信，混沌鍵控，混沌參數調制，混沌掩蓋，混沌數字碼分多址等五大類，指出了各自存在的問題和發展方向。
  12. Emulation of fdma model based on matlab

    頻分多址接入模型的模擬研究
  13. Ofdm : orthogonal frequency division multiplexing

    正交頻分多址
  14. Tdma time division multiple access

    頻分多址
  15. Frequency division multiple access fdma

    頻分多址
  16. Fdma : frequency division multiple access

    頻分多址
  17. On - board processing ( obp ) is an important direction in satellite communications, where on - board conversion from fdma to tdm is very useful in raising channel efficiency and decreasing cost of earth stations. basing on extensive research of the fdma ? dm conversion, this thesis proposes a new way for such conversion, i. e. fdma ? wtdm conversion, which is based on a china invention patent ? a time division multiplexing transmission technique for band - limited signals

    星上處理是衛星通信技術發展的重要方向，其中星上頻分多址至時分復用（ fdma - tdm ）多址/復用方式的轉換是一個研究熱點，因為它能用於構成一種通道利用率很高、地面站成本很低的fdma / tdm體制的衛星通信系統。
  18. Fdma frequency division multiple access

    頻分多址
  19. Frequency division multiple access

    頻分多址
  20. High technology is applied to gsm, such as fdma, tdm a, and frequency hopping. many logical channels related to different services and the mapping of logical channels to physical channels are defined

    Gsm系統綜合運用了頻分多址（ fdma ）技術，加上時分多址（ tdma ）技術，並輔以跳頻技術。
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