譜線干擾 的英文怎麼說

中文拼音 [pǔxiàngānrǎo]
譜線干擾 英文
spectral line interference
  • 譜 : Ⅰ名詞[書面語]1 （按類別或系統編成的書或冊子等） table; chart; register 2 （指導練習的格式或圖形）...
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 干 : 干Ⅰ名詞1 （事物的主體或 重要部分） trunk; main part 2 （幹部的簡稱） short for cadre Ⅱ動詞1 （做...
  • 擾 : Ⅰ動詞1 （擾亂; 攪擾） harass; trouble 2 （客套話 因受人款待而表示客氣） trespass on sb s hospital...
  1. The potential applications of amr include both civil and military communication, especially non - cooperative communications and communication confrontation, such as identifying signals, supervising signals, distinguishing interference, electronic confrontation, analyzing military threat, etc. on the basis of our analysis to the existing research on feature abstraction, the related feature abstraction methods are optimized in this paper, resulting several effective methods such as the feature abstraction based on transformation domain, stepped voltage level analysis, normalized carrier - free spectral energy analysis, squared signal and fourth powered signal analysis, etc. both the decision theory based on recognition algorithms and the artificial neural network ( ann ) based on recognition algorithms is analyzed, and the former is selected as it is more appropriate for this research

    調制類型的自動識別廣泛應用於民用通信與軍用通信，尤其是對于非合作性通信、通信對抗，比如：信號確認、信號監控、干擾辨識、電子對抗、軟體無線電、電子救援、通信對抗、軍事威脅分析等。本論文在分析現有研究的基礎上，借鑒了已有的特徵提取方法，對相關調制類型特徵提取方法進行了優化，使用了一些有效的方法，如基於變換域特徵提取方法、梯層電平分析方法、剔除載波后的歸一化頻域能量分析方法、信號平方后的頻譜分析方法、信號四次方后的頻譜分析方法等。通過對基於決策理論和基於人工神經網路兩種識別演算法進行分析，本論文選擇了較適合的基於決策理論的識別演算法。
  2. This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller

    本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。
  3. The mutual coupling between elements is expressed in terms of the normalized impedance matrix of the uniform linear array, the concise expressions for the optimized weight of the lms algorithm and the signal - to - interference - plus - noise ratio are given. the effect of mutual coupling on the performance of the sinr is illustrated with two examples, a method for compensating the mutual coupling is present, the compensation effect of this method is verified by example

    用譜分析法，把陣元問的互耦用陣列的歸一化阻抗矩陣來描述，推導了均勻線陣的最佳權矢量及信號干擾噪聲比的表達式，模擬計算了互耦對自適應天線陣列的信號干擾噪聲比的影響，給出了一種校正互耦的方法，數值模擬了校正的效果。
  4. The predistortion, which aims at compensating for the nonlinear distortion caused by the power amplifier, has a good performance in eliminating the nonlinear distortion of am / am & am / pm, improving the aci and spectrum efficiency

    預失真技術是針對射頻功率放大器非線性而提出的一種補償技術，可以有效消除由非線性造成的傳輸信號的幅度和相位失真，降低信號鄰道干擾（ aci ） ，提高頻譜利用效率。
  5. To improve anti - jamming technique by spread spectrum close to monochromatic frequency, so that enhance the ability of anti - active - jamming and anti - passive - jamming, anti reconnaissance, anti - radiation missile, anti - stealth, by means of multi frequency spread spectrum and hopping spectrum instead of mono - frequency spread spectrum, realizing strong processing system for anti - interference signal, providing the method of generating of chirp signal and corresponding matched filter system

    摘要為改進線性調頻雷達系統所採用的在單色頻率點附近擴譜抗干擾技術，加強制導雷達站具備抗有源、無源干擾，反偵察，抗硬殺傷的反幅射導彈和反隱身的能力，通過將單頻點擴譜改為多頻點擴譜跳譜，實現了高抗干擾信號處理系統，給出方案中在中頻段實現的線性調頻信號產生方法以及對應的匹配濾波處理系統。
  6. By theory and practice simulation, the several types of constant envelope modulation techniques are analyzed and compared, including theirs modulation principle, phase path, the modulated wave envelope, power spectrums, error bit rate and the influence of its power spectrums of the band - limited and non - linear, etc. especially we have researched the ijf - oqpsk modulation technique, and the performance of its inter - symbol interference and time jitter free, and its strongly resisting of spectral spreading

    結合理論和實驗模擬結果，分析討論了衛星通信中的各種恆包絡調制技術，對它們的調制原理，相位路徑，已調波包絡，功率譜密度，誤碼性能，以及帶限非線性通道對其功率譜的影響等方面都作了研究和比較。特別研究了ijf ? oqpsk在消除碼間干擾和定時抖動方面的性能及其優良的旁瓣特性和抑制頻譜擴展特性。
  7. In order to overcome problems arisen from the application of x fluorescence analysis into complex spectrum produced by archaeological ceramic fragments with multi - element, low content and thick ground, we have employed the artificial neural network into the research of x fluorescence archaeology and conducted three kinds of research works. as the first one, we have applied the linear olam network ( optimal linear association memory network ) and the non - linear bp network ( back - propagation network ) respectively to analyze the complex x fluorescence spectrum of archaeological samples, and taken both results of spectrum analysis to compare with each other. the second, the method of pattern recognition of bp network was tentatively used to perform intelligent identification of production places of these archaeological samples

    針對科技考古中對大量考古陶片進行產地研究時x熒光分析對多元素、低含量、厚基底考古陶片產生的復雜譜分析的問題，將人工神經網路引入x熒光考古中，進行了三方面的研究工作：一是用線性olam網路（最優線性聯想網路）和非線性bp網路（誤差反傳導網路）分別對考古樣品的x熒光復雜譜進行解譜，並比較二者的解譜效果；二是用bp網路模式識別方法對考古樣品的產地進行智能識別；三是為了提高網路運算的可靠性和減小基體效應及電噪聲的干擾和影響，研究並提出了三種網路學習前的譜數據預處理方法。
  8. From the research of ijf - oqpsk, we draw the conclusion that, compared with bpsk, qpsk and msk modems, in the band - limited and non - linear channel, it has nearly constant envelope, less spectral spreading, better pe performance and the less interference of the adjacent channel, et. so, it is more suitable for the satellite communication channel

    通過對ijf ? oqpsk的分析研究可知，它相對于傳統的bpsk和qpsk調制方式，在帶限非線性通道下，具有包絡近似恆定，頻譜擴展小， eb no惡化小，對鄰道產生干擾弱等優點，因而它更適合於衛星通道。
  9. Anti - jamming capability of interferometer direction finder with multi channel receiver is analyzed and studied. measures for control co - channel jamming are given : reduce intererence strength by antenna character, change gate level of receiver, alter df bandwidth, make use of the pause function of display and a type of filter

    提出了抗同波干擾的若干措施：利用天線的方向圖抑制干擾信號、改變接收信號的門限電平、改變測向帶寬、利用屏幕顯示的暫存功能、倒譜同態濾波方法等。
  10. Besides, the system found a fault in the transformer, and the results detecting can be a warrant of state - repair. on the bases of a great deal of investigates and researches, the paper sums up the interfere sources on locale. especially the paper draws some valuable conclusion that the oil cycle style, running state, configuration, oil flow distributing of transformer, position of faults and destroy degree when confirming and choosing sampling position

    在大量調查研究的基礎上，分析歸納了變壓器多種現場干擾因素和不同取樣點對變壓器油色譜在線監測及診斷的影響，特別是變壓器油色譜在線監測在確定和選擇取樣點時，必須考慮變壓器油循環方式、運行狀態、變壓器結構、油流分佈、故障部位及嚴重程度等情況。
  11. For recent years, adsl has world widely employed and widely used in many aspects such as vod, remote medical treatment and e - shopping etc. but we noticed that the traditional telephone networks are designed for the transmission of low frequency signals, and the adsl ' s frequency rang is from 0 to 1. 104mhz, so we must confront the signal attenuation, the loop line noise impairments, the crosstalk interferences, the bridge tap reflections and the rf disturbances problems and many other problems when transmitting the adsl signals one the telephone networks

    近幾年來， adsl在世界范圍內得到充分的使用，廣泛應用於視頻點播、遠程醫療、網上購物等各個方面。但是由於電話線網路是專門為傳輸低頻信號而設計，而adsl的頻譜范圍在0 1 . 104mhz內，因此在傳輸adsl信號時，面臨著信號衰減、線路噪聲、串音干擾、橋接抽頭反射和射頻干擾等等多方面的問題，這就要求在adsl開通之前對線路進行一系列的測試。
  12. With the opening - up reform and economic development, the radio is increasing sharply, frequencies spectrum resource of radio are hi short day, radio interference takes place frequently, take that the radio monitors is more and more heavier the construction of the monitoring system of rsadio is problem which is in need of solution in front of the managements organization of radio at all levels

    隨著改革開放和經濟的發展，無線電設臺激增，無線電頻譜資源日益緊張，無線電干擾時有發生，無線電監測的任務也愈來愈重，無線電監測系統的建設是擺在各級無線電管理機構面前亟待解決的問題。
  13. Smart antenna may reduce coggege of electronic engineering of uestc, the cochannel interferences ( cci ), enhance the user capacity and spectrum efficiency, reduces the transmit power and electromagnetic interferences, enhance the transmit efficiency, dynamically divide cells in third generation cellular

    智能天線技術應用於第三代移動通信系統中具有可以減小因頻率復用造成的共通道干擾（ cci ） 、提高頻譜利用效率及增大系統容量、減小發射功率和空間電磁干擾、增加發射效率、對小區進行動態劃分等優點。
  14. Efforts must be made to accelerate the establishment of a radio management technology system in beijing, to improve the overall capability of spectrum management, radio signal monitoring, interference analysis and radio equipment testing

    加快構筑北京市無線電管理技術支撐體系，全面提高頻譜管理、無線電信號監測、干擾分析和無線電設備檢測能力。
  15. So it is essential to diminish the errors and enhance its anti - jamming ability. an innovative method of measuring pipeline thickness based on power spectral evaluation computing has been put forward. besides, experiments on the on - line measurement have yielded good results, proving the veracity and reliability of the measurement

    介紹了為減小系統的測量誤差、提高系統抗干擾能力而進行的對超聲波回波信號的分析研究工作，創新地提出了一種基於對超聲脈沖多次反射回波功率譜估計的超聲測厚方法，並通過實驗證明了該方法用於在線檢測的準確性與可靠性。
  16. This paper introduce the status and fuction of radio monitor in the radio spectrum management at first, and explain radio monitoring center build every specification requirement put forward to national radio monitoring system, at the sam time, the paper analyses the radio interferece, examineto error, the comprehensive pain of design of monitoring system of handling, combining the actual proposition hi our province

    本文首先對無線電監測在無線電頻譜管理中的地位作用和職能作了介紹，闡述了國家無線電監測中心對全國無線電監測系統建設提出來的各項技術要求，並從理論上就在無線電系統建設中需解決的無線電干擾，測向誤差，電磁兼容等問題作了分析。然後結合我省無線電管理工作的實際提出了搬移式綜合監測系統的設計方案。
  17. The application of smart antenna technique in wireless communications gives us a new solution. it allows the base station to transmit to and receive from mobiles by directional beams, which can improve the system performance by relieving the cci, decreasing the transmission power, improving the spectrum efficiency, enlarging the system capacity and so on

    空域自適應濾波即智能天線技術在移動通信領域的引入為這些問題的解決帶來了新的思路，它能夠實現基站對移動臺的定向發射和接收，從而能大大減輕系統的多址干擾，降低系統的發射功率，提供系統的頻譜利用率，增大系統容量等好處。
  18. Spread spectrum communication is paid more attention to the advantage of good message privacy, antijamming and mutiple access in the world, it shows strong vitality on the side of measuring distance, antenna measure, mine communication, tactics communication, muti - access application, mobile communication and so on

    擴展頻譜通信以其保密性好、抗干擾能力強、多址性等優點成為目前世界上廣為受重視的一種通信技術，它在測距、天線測量、礦井通信、戰術通信、多址應用、移動通信等方面都顯示了強大的生命力。
  19. Spread spectrum technique, which can handle variable adverse environments, exhibits unique qualities that have a number of advantages in anti - jamming, anti - noise, reduction of multi - path interference, low power spectral density, privacy, selective addressing and code division multiplexing

    擴頻通信技術具有優越的抗干擾、抗噪音、抗多徑衰落性能，能在低功率譜密度下工作，具保密性、可多址復用和任意選址，能有效克服各種惡劣的通道特性，目前廣泛應用於移動通信、雷達、導航、測距、電力線通信等領域。
  20. Because of the affection of noise and signal fading, in order to high data rate access and high quality, wireless communication need new technology to improve the link reliability and enhance the spectrum efficiency. mimo ( multiple input and multiple output ) can enhance the spectrum efficiency and increase channel capacity greatly, and reduce the multipath affection without spectrum band and power increasing. the 3th generation mobile communication wcdma is coming, with the purpose of putting mimo, stbc ( space time block coding ), space diversity into practice of wcdma systems, in order to lay the foundation of 3g toward 4g, this dissertation has done some research under this background

    在發射機和接收機使用多個天線進行數據傳輸的多輸入多輸出（ mimo ）技術，可以在不增加帶寬和天線發送功率的條件下，成倍的提高頻譜利用率，提高系統的通道容量，還可以抗多徑干擾。第三代移動通信wcdma即將到來，為了將多天線技術（ mimo ） ，空間分集技術，空時編碼技術用到wcdma系統中去，為第三代移動通信向第四代移動通信系統平穩過渡奠定一定的基礎，需要做一些理論上的研究。
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