radio frequency spectrum 中文意思是什麼

radio frequency spectrum 解釋
射頻頻譜
  • radio : n. 1. 無線電訊[電報，電話]；無線電，射電。2. 無線電廣播；無線電（廣播）臺。3. 收音機。vt. ,vi. 用無線電傳送[廣播]；（向…）作無線電廣播[傳送]；用X射線拍照；用鐳醫治。
  • 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。
  • spectrum : n. （pl. -tra ）1. 【物理學】譜，光譜；波譜；能譜，質譜。2. 【無線電】射頻頻譜；無線電（信號）頻譜。3. 【心理學】（眼睛的）余像；殘像。4. 〈轉義〉范圍，幅度；（連續的）系列。
  1. The frequencies in the electromagnetic spectrum that are used for radio communications ； a camera may work via radio frequency

    使用無線通訊的頻率，亦可用作無線攝像機的圖像傳送。
  2. Electromagnetic compatibility and radio spectrum matters - electromagnetic compatibility standard for radio equipment and services - part 12 : specific conditions for very small aperture terminal, satellite interactive earth stations operated in the frequency ranges between 4 ghz and 30 ghz in the fixed satellite service v1. 2. 1

    電磁兼容性和無線電頻譜情況.無線電設備和服務的電磁兼容性標準.第12部分:固定衛星服務中工作在4 ghz到30 ghz頻帶的衛星地面站微小孔徑端的具體條件
  3. The radio spectrum ? the segment of the electromagnetic continuum containing waves in the radio - frequency range ? accommodates countless communications devices today

    無線電頻譜（一個連續的射電頻率范圍區段）容納了今日無數的通訊頻率。
  4. These developments will yield a cognitive radio able to sense its rf environment and location and then alter its power, frequency, modulation and other operating parameters so as to dynamically reuse whatever spectrum is available

    以這些發展製作出來的感知無線電裝置，能感應所在的rf環境與地點，進而調整功率、頻率、調變及其他運作參數，以便靈活運用所有可用的頻譜。
  5. Electromagnetic compatibility and radio spectrum matters - meteorological aids met aids - radiosondes to be used in the 400, 15 mhz to 406 mhz frequency range with power levels ranging up to 200 mw - part 2 : harmonized en covering essential requirements under article 3. 2 of the r tte directive v1. 1. 1

    電磁兼容性和無線電頻譜情況.氣象輔助裝置.用於功率電平200 mw及以下的400 . 15 mhz到406 mhz頻帶的無線電高空測候器.第2部分:包括r tte指令3 . 2條款基本要求的協調的en
  6. On the basis of high speed hybrid filter banks adc system, a kind of downsampler model based on bandpass sampling theorem is presented, and analyzed, proved in time and frequency domain, in addition a downsampler is designed according to the model. a class of high effective hybrid filter banks adc system which bases on the downsampler and radio frequency spectrum is proposed, of which digital signal rate falls m times as fast as the former

    作者提出了一種基於帶通采樣定理的抽取器數學模型，對該數學模型進行了時域、頻域的分析證明后，設計了一種基於該數學模型的抽取器，進而根據無線電射頻信號頻譜的特點，提出了高效混合濾波器組adc系統，其數字信號輸出速率比高速混合濾波器組adc系統降低m - 1倍。
  7. The aim is to ensure efficient utilization of the radio frequency spectrum and the satellite orbital positions

    目的是確保有效運用無線電頻譜及衛星軌道位置。
  8. Abstract : applied the principle of electromagnetic interference prediction, interference multi - predictions are made to solve the frequency spectrum administration in accordance with collective using radio sets in integrated communication command system. this paper obtains the frequency interval between radio sets making sure the electromagnetic compatibility

    文摘:應用電磁干擾預測的原理，針對一體化通信指揮系統中，多部電臺集中使用所帶來的頻率管理問題，進行了干擾多級預測，得出了保證電磁兼容性系統各電臺之間應滿足的頻率間隔，提出了通信網中通信頻率方案。
  9. Some valuable conclusions are summarized by theoretical analysis and simulation experiments : from the side of signal processing, pulse jamming can be deleted by the method of time - domain sliding window accumulation and can be restored by interpolative prediction. ; gauss white nose can be attenuated while jamming disperse point - target by the method of time - frequency analysis in time - frequency domain. ; radio frequency noise jamming can be deleted by the method of average range frequency spectrum and notching in frequency domain

    通過大量的理論分析和模擬實驗，得到了一批具有一定價值的結論：從信號處理的角度出發，對于脈沖式干擾，能夠運用時域滑動窗口積累的方法去掉，並且通過預測插值得到較好的恢復；對于高斯白噪聲干擾，在時頻變換域內應用時頻分析方法可減小其對分散點目標的干擾；對于射頻噪聲，通過平均距離頻頻法和頻域陷波的方法可以去掉；從改變合成孔徑雷達系統角度出發，類似雙基地雷達能夠避免各種干擾，對發射信號進行調幅，調相以及改變調頻斜率都是較好的抗干擾方法。
  10. Electromagnetic compatibility and radio spectrum matters - satellite personal locators beacons operating in the 406, 0 mhz to 406, 1 mhz frequency band - part 1 : technical characteristics and methods of measurements v1. 1. 1

    電磁兼容性和無線電頻譜情況.工作在406 . 0 mhz - 406 . 1 mhz頻帶的衛星個人定位器信標.第1部分:技術特性和測量方法
  11. In recent years, radio technology has developed very quickly in our country. however, a radio monitoring receiver with broad frequency scale ( 20 - 3000 mhz ), high scanning rate ( above 1ghz / s ) and whole spectrum real - time display has not developed. some imported monitoring receivers with broad frequency scale can only scan slowly and could n ' t meet actual needs. not only these imported receivers " price is high but also those developed countries usually limit the quantities of imported receivers and related technology is not open

    近年來我國無線電技術水平已經有了很大發展和進步，但對于頻率覆蓋范圍寬（ 20 - 3000mhz ） 、掃描速度快（ 1ghz / s以上）並具備快速全頻段實時頻譜顯示和記錄的無線電監測接收設備，目前我國尚不能生產，國內現在已經進口的寬頻段監測接收機一般也只能進行低速掃描，無法滿足實際的需要。
  12. By analysis of the intermediate frequency signals which through eight antennae and receiver channels, eight channels radio spatial spectrum direction finding system can reach the purpose of finding radio direction

    八通道無線電空間譜測向系統通過分析經過八路天線和接收機通道以後的中頻信號達到確定無線電信號方向的目的。
  13. Electromagnetic compatibility and radio spectrum matters - radio equipment in the frequency range 9 khz to 315 khz for ultra low power active medical implants ulp - ami and accessories - part 1 : technical characteristics and test methods v1. 1. 1

    電磁兼容性和無線電頻譜情況.紫外線低能活性醫療植入物和附件用頻帶在9 khz到315 khz的無線電設備.第1部分:技術特性和試驗方法
  14. Electromagnetic compatibility and radio spectrum matters - radio equipment in the frequency range 9 khz to 315 khz for ultra low power active medical implants ulp - ami and accessories - part 2 : harmonized en covering essential requirements of article 3. 2 of the r tte directive v1. 1. 1

    電磁兼容性和無線電頻譜情況.超低功率活性醫用植入物和附件用頻率范圍在9 khz到315 khz的無線電設備.第2部分:包括r tte指令3 . 2條款基本要求的協調en
  15. In order to overcome the disadvantages of the existed frequency spectrum analyzer instrument, the idea of software radio was applied, and a scheme of rf virtual frequency analyzer instrument based on digital intermediate frequency was presented, then its feasibility was analyzed

    本文針對現有頻譜分析儀的不足，運用軟體無線電的思想，提出一種基於中頻數字化的虛擬射頻頻譜分析儀的方案，並對其可行性進行分析。
  16. The main working contents of this paper is following : 1 according to the theory of electromagnetic induction law, a new radio induction system is proposed based on the traditional radio induction technology, analyzed on its signal transmission character and its frequency spectrum character. the channel composed of the new radio induction system is compared with the parameter - constant channel and the parameter - changing channel. the application of the new radio induction system is studied in converter supply

    本文的主要工作內容如下： 1在現有的無線感應技術基礎上，基於電磁感應理論，提出了新型無線感應系統，分析了新型無線感應系統的信號傳輸特性，分析了新型無線感應系統的頻譜特性，把新型無線感應系統組成的通道和恆參通道、變參通道進行了比較，研究了新型無線感應系統在變流器供電中的應用。
  17. Ofta proposes public auction of radio frequency spectrum for cdma2000 mobile service

    電訊局建議公開拍賣流動服務無線電頻譜
  18. The main duties of ofta cover economic and technical regulation of telecommunications services, enforcement of fair competition in the telecommunications sector and management of radio frequency spectrum

    電訊局的主要職責包括電訊服務的技術和經濟規管、維持電訊市場上的公平競爭及管理無線電頻譜。
  19. With the occurrence of multi - standards and poly - systems in wireless communication system, the increase of the requirement of intercourse and the lacking of radio frequency spectrum resource, the traditional wireless communication system cannot be adapted to the relative development

    在無線通信系統多標準、多體制以及無線電頻譜資源的缺乏背景下，對無線通信系統的互通性要求增加，傳統無線通信系統已難以適應發展的需要。
  20. At the meeting when the panel discussed issues relating to sound broadcasting licence renewal, some members saw merits in the early implementation of digital broadcasting in order that more radio frequency spectrum could be released for setting up additional channels, including community channels

    在會議席上，事務委員會討論與聲音廣播服務續牌有關的事宜，部分委員認為及早實施數碼廣播將帶來不少益處，因此舉可開放更多大氣電波，以供設立其他頻道，包括社區頻道。
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