spectrum effectiveness 中文意思是什麼

spectrum effectiveness 解釋
頻譜效率
  • 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. When garlic is crushed, the allium is converted to an antibiotic called allicin. allicin appears to have broad - spectrum effectiveness in fighting infections

    直到1987年，已有1275家科學研究機構提出證明：大蒜在許多其它領域具有治療和促進健康的作用。
  2. The spread spectrum communication ’ s availably jamming becomes the key to get the electronic war ’ s victory, so it is very important to research the effectiveness of jamming and interference referred to the direct sequence spread spectrum ( ds - ss ) communication system

    為取得現代電子戰的勝利，對擴頻通信的有效干擾成為關鍵。因此，研究直接序列擴頻通信干擾效能具有重要的現實意義。
  3. At last, the experiment result proved the effectiveness of the spectrum rebuilding technology. the experiment result show that the wavelength detection accuracy is improved by an order of magnitude using the spectrum rebuilding technology compared with that obtained from direct peak search. some other schemes to enhance the accuracy are illustrated

    最後列舉了其它幾種提高測量精度的方案，包括關鍵器件可調諧濾波器的位置變化提高信噪比，調整探測器pinfet的輸出電壓的零點以提高a / d採集卡的利用率，以及採用系統參考消除系統誤差造成的波長漂移。
  4. Conventional detector ( single - user matched filter ) distinguishes each user by the crosscorrelation of their spread - spectrum codes. in practice, however, its performance is much deteriorated due to the existence of noise in channel and strong multi - access interference, i. e. near for effect. a new method using independent component analysis is proposed in this paper. the - received energy of signals is controlled effectively, thus the near - far effect is overcome as much as possible ; moreover, the effect that noise imposed on the detector is mostly reduced. simulations verify the effectiveness of this method

    傳統檢測器（單用戶匹配濾波）利用擴頻碼之間的互相關特性來區分各用戶信號.而在實際應用中，通道噪聲和近距離用戶對遠距離用戶的強多址干擾即遠近效應，使得接收機的性能受到很大影響.本文將獨立分量分析法引入傳統接收機，有效控制接收信號的能量，從而極大地提高了接收機的抗遠近性能，同時噪聲的影響被盡可能消除.模擬結果表明了該方法的有效性和可行性
  5. 1 in the research of design of radar waveform, one kind of hybrid radar waveform obtained by combining the chirp waveform with the non - periodic pseudorandom sequences is discussed. through the theoretical analysis and computer simulation, several main characteristics of this kinds of hybrid waveforms are discussed, such as the ambiguity function, ambiguity graph, the spectrum, the weighting methods, the response of the processing filter and the low probability of interception. those are showing the effectiveness of the new hybrid waveforms on the performance of high resolution and low probability of interception

    作者在以下幾個方面的研究工作中取得了進展及創新： 1 、在雷達波形設計中，介紹了一類新的線性調頻信號與非周期隨機編碼信號相結合的組合波形的組合形式，通過理論分析和大量的計算機模擬研究了這類組合波形的模糊函數（圖） 、頻譜特性、多普勒頻移特性、加權輸出特性、低截獲等方面的特點，證明了新型的組合波形在高分辨、低截獲等方面的有效性。
  6. Tdd - cdma has so much technology advantage such as high spectrum effectiveness, big capacity, supporting asymmetrical uplink and downlink and so on, that it can especially solve the problem of some areas in our country which have overpopulation and scarcity of spectrum resource

    Tddcdma技術具有上下行鏈路不對稱、頻譜利用率高、發射功率低等優點，非常適合於第三代移動通信中的非對稱數據業務，並可以提供較高的系統容量，特別是能夠滿足我國一些地區人口密集而頻譜資源緊張的需要。
  7. Simulation results show that it is effectiveness and the synchronization technique is robust. using quasi - stochastic property and ergodic theory of chaos, a kind of new hybrid ds / sfh spread spectrum communication scheme is presented based on vss synchronization technique

    在變結構混沌同步方法的基礎上，利用混沌系統的遍歷性和偽隨機性，提出了一種新的保密性很強的混合ds sfh擴頻通信系統設計方案。
  8. The wavelet transform is discussed in the code - width estimation ; and the feasibility and effectiveness of the code - width estimation using the spectrum of the bipolar base - band signal are proved

    在參數估計中，主要討論了小波變換演算法在基帶信號碼元寬度估計中的應用以及利用雙極性基帶信號的頻譜估計碼元寬度的可行性和有效性。
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