寬頻技術 的英文怎麼說

中文拼音 [kuānbīnjìshù]
寬頻技術 英文
broadband technology
  • 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...
  • 技 : 名詞（技能; 本領） skill; ability; trick; technique
  • 術 : 術名詞1. （技藝; 技術; 學術） art; skill; technique 2. （方法; 策略） method; tactics 3. （姓氏） a surname
  • 寬頻 : bisdn
  1. Shortwave channel is time varying transmission channel. it has dispersion in frequency and time domains. this characteristics hinds the data transmi - ssion at high speed and the correction of received data. in this dissertation i have analyzed the statistic characteristic of shortwa - ve channel, established the model of shortwave channel and simulated the rayl eigh fading distribution. the technology of spreading spetrum has been proved that it has the capability for anti - multipath and discerning multipath

    在短波通信中，由於通道的時間色散和頻率色散，引起多徑展寬和多徑衰落，前者限制了數據的傳輸速率，後者造成短波數據通信中出現突發錯誤，為了解決多徑效應對短波通信的影響，本文所做工作如下：首先詳細分析了短波通道的統計特性，建立其數學模型；其次分析了擴頻通信的特點，從理論上證明擴頻技術不僅具有抗多徑干擾能力，而且具有分離多徑的能力；介紹了傳統的rake分集合併技術的特點。
  2. As increasing numbers of broadband users gather in crowded spaces such as airports, hotels, convention centers and workplaces, the most critical parameter of a wireless system will be its spatial capacity, a capability in which uwb technology excels

    隨著愈來愈多的寬頻用戶聚集在擁擠空間，像是機場、飯店、會議中心與辦公室，無線系統最關鍵的一項參數將是空間容量，而超寬頻技術在這項能力上的表現獨占鰲頭。
  3. By making full use of favourable narrow - band tracing filter character of pll and by combining the merits of dds such as super fine frequency resolution 、 high frequency accuracy 、 very fast frequency hoping with it, the pll / pll + dds frequency synthesizer presents wide band high quality source and super small frequency hoping step. while the electronically tuned filter abates the image interference and notably improves the selectivity. the theorem of frequency synthesizer and center - frequency - fixed filter is simply but adequately introduced first in this paper

    課題中所採用的pll或dds pll鎖相頻率合成方法充分發揮鎖相環良好的窄帶跟蹤濾波特性，並結合dds的高頻率解析度、高頻率精確度和高速頻率捷變等優點，分別實現了系統所要求的高質量寬帶本振源和小步長頻率捷變；採用電調諧選頻技術，則大大改善了接收機的選擇性和抗干擾能力。
  4. Motorola is involved in all aspects of digital broadband technology, from headend system solutions to consumer terminal products, and is the market leader for set - top terminals in the united states

    摩托羅拉擁有由前端系統方案至用戶接收器產品的全系列數碼寬頻技術，並且在美國的機頂盒市場佔有領導地位。
  5. Researched four technology of structure conversion about digital video, de - interlaced, frame ratio down or up, row ration down or up, the width and high transforming, implemented lots of corresponding arithmetic of four techniques, motion compensate structure conversion method based on the motion estimating improved the image sequence definition and liquidity degree

    4研究了數字視頻結構變換的四種技術：去隔行技術，變頻技術，行頻轉換技術，寬高比變換技術。實驗驗證了大量的相關演算法，其中基於運動估計的運動補償結構轉換方法，清晰度和流暢度得到了很大的提高。
  6. Frequency estimation technology and bandpass filtering, which are named as wideband digital downconversion technology, are the key technologies to realize data rate conversion system

    測頻技術以及帶通濾波，即寬帶數字下變頻技術，是實現數據率轉換系統的關鍵技術。
  7. A comprehensive theory is presented for fm spectroscopy of doppler - broadened molecular iodine absorption lines. the relationship betwcen fm spectroscopy and modulation frequency and modulation index has been studied. the whole circuit for thc frcquency stabilized laser system has been developed

    建立了多普勒加寬碘分子線性吸收fm光譜的一般理論，對fm光譜與調制頻率和調制度的關系進行了研究；並研製了532nmnd : yvo _ 4 / ktp碘吸收穩頻激光器的電路系統；提出了虛擬激光穩頻技術的概念。
  8. With double - frequency technique and q switch technique the laser delivers a laser pulse of 532 - nm in wavelength, 5 - ns in pulse width, 35 - mj in energy and 2 - cm in coherent length

    所用激光器為nd : yag脈沖激光器，採用了調q和二倍頻技術，波長為0 . 532 、脈沖寬度為7ns 、相干長度為2cm ，能量為35mj 。
  9. Scalar network analyzer is a kind of intelligent instrument based on frequency sweep test technology that used to measure the amplitude - frequent cy characteristic of linear system. network analyzer adopt these new technology such as frequency synthesis, sampling technique, broad - band sweeping and computer - assisted testing

    標量網路分析儀是一種基於掃頻測量技術，用於測量線性系統幅頻特性的智能化儀器。網路分析儀結合了頻率合成技術、采樣技術、寬帶掃頻技術、計算機輔助測量等新技術。
  10. By working together, dvn and motorola will be able to capitalize on each company s respective strengths, and hence accelerate the deployment of digital home terminals ( also known as set top boxes ) in china. " with video, data, and voice beginning to converge around the world, motorola with its strengths in broadband and hardware ; and dvn with its presence in china and strengths in application software for the china market, will be able to provide the technology to facilitate this convergence in china

    透過雙方攜手，天地數碼與摩托羅拉將可充份利用彼此的優勢，加快家居數碼廣播接收機（又稱機頂盒）在中國的普及應用。全球的影像、數據及話音傳輸日趨整合，憑藉摩托羅拉在寬頻技術及硬體上的優勢，加上天地數碼在國內市場的地位，以及在應用軟體方面的資深經驗，將可為中國在這個通訊整合的大趨勢下，提供所需之技術。
  11. With video, data, and voice beginning to converge around the world, motorola with its strengths in broadband and hardware ; and dvn with its presence in china and strengths in application software for the china market, will be able to provide the technology to facilitate this convergence in china

    全球的影像數據及話音傳輸日趨整合，憑藉摩托羅拉在寬頻技術及硬體上的優勢，加上天地數碼在國內市場的地位，以及在應用軟體方面的資深經驗，將可為中國在這個通訊整合的大趨勢下，提供所需之技術。
  12. Rtce is based on forecasting the inherent vulnerabilities to propagation of hf time - varying channel, including multipath delay, doppler spread, selective fading, interference, so this paper also introduces characteristics of hf channel in the beginning. familiar rtce systems all adopt envelope method that bello brought forward

    實時選頻技術是基於對短波電離層時變通道固有的不利於電波傳播的各種因素，包括通道的多徑展寬、多普勒展寬、選擇性衰落、噪聲干擾等的預測的基礎上實現的，所以在開篇對短波通道的特點進行了詳細的介紹。
  13. Digital video technonogy is the main part of the field of information industry which the country develops especially. with the rapid progress of broadband network and digital tv, the applications of video - on - demand, interactive tv and video website become more and more popular. all of these applications are facing the emerging digitalized video data in a large amount

    數字視頻技術是國家重點發展的信息產業領域的重要組成部分，隨著寬帶網路和數字電視的迅速發展，視頻點播、交互電視、視頻網站等應用需求越來越廣泛，這些應用都將共同面臨大量涌現的數字化視頻數據。
  14. Assigning serial different address code to different subscribers, useful signal is taken out of the same time slot and frequence, and is transmitted with one share channel. at received end, system makes use of completed address code from sending end to do correlative check and take out useful subscriber signal. the other address code signals are treated as broadband disturbing signal which is removed. in radio environment of existing variable disturbtion and muti - way declining, expand frequence signal ’ s broadband characteristics can improve system performance obviously. cdma mobile telecommunication system has some better characteristics, such as anti - disturbing 、 anti - way declining 、 secrecy 、 capacity 、 utilizing rate of frequence resource and so on, than other mobile telecommunication system

    Cdma （ codedivisionmultipleaccess ）移動通信系統的技術基礎是基於擴頻技術的碼分多址，通過給不同的用戶分配各自特定的地址碼序列，將處于相同時隙和頻率的用戶信號分離開來，採用共享通道方式傳輸信息。在接收端，系統利用與發送端完全一致的本地地址碼對接收信號進行相關檢測，提取需要的用戶信號，而將其他使用不同碼型的信號視為寬帶干擾而從中剔除掉。
  15. This system realizes the underwater distance mobile security communication. the only shortage is the low velocity, which is result from the speciality of underwater channel and that spread spectrum need big frequency band

    採用這一技術的水聲通信實驗系統成功的進行了湖上試驗，這種技術的不足是通信速率較低，這是由於水聲通道的特殊性以及擴頻技術要佔用大量帶寬所致。
  16. The test result indicates that the vivaldi antenna has better radiation performance that accords with the theory analyses frequency domain on 3. 1ghz

    測試結果表明，該天線在3 . 1ghz 10 . 6ghz頻段內得到比較滿意的輻射性能，實現了超寬帶技術要求，與理論分析吻合較好。
  17. This paper discusses key technology in the digital intermediate frequency receiver with wide band based on software radio, including down - converter on condition of band - pass - sampling, digital down - converter, multi - rate digital signal processing, band - pass signal decimating, and achieves software system simulation based on under - sampling

    摘要分析了基於軟體無線電的寬帶數字中頻接收機中的關鍵技術帶通采樣下變頻技術、數字下變頻技術、多速率處理技術，並實現了欠采樣技術條件的軟體系統模擬。
  18. Us wireless broadband technology provider sets rhq in hong kong

    美國無線寬頻技術供應商選址香港成立地區總部
  19. In this paper, a complete scheme is proposed for el wireless spread spectrum modem in tdd mode. firstly, it discusses tdd protocols and base band module. secondly, with in - depth ananysis on hfa3860b and its high speed spread spectrum technology ( mbok ), we incorporates the chip for continuous and transparent transmission of el data successfully

    論文在對hfa3860b進行深入研究的基礎上，對晶元所採用的高速擴頻技術? mbok擴頻技術進行了理論探討，並成功地將其用於e1數據的無線擴頻透明傳輸，實現了系統要求，並且拓寬了晶元的應用范圍。
  20. Uwb technology has other significant, noncommunications applications as well

    超寬頻技術還有其他非通訊方面的重要應用。
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