fm noise 中文意思是什麼

fm noise 解釋
調頻噪聲
  • fm : 1 Field Marshal 〈英國〉陸軍元帥。2 frequency modulation 【物理學】調頻，頻率調制。3 foreign miss...
  • noise : n 1 聲音，聲響。2 叫喊；嘈雜聲，噪音；喧鬧聲；吵鬧，騷動，騷擾。3 〈古語〉謠言，風聲。4 〈美國〉...
  1. The master dissertation introduces passive correlative orientation system and base theory in signal dispose briefly in the first place. the system takes tv sound fm signal from tv satation signal. the power rate of tv station signal to sound signal is ten to one. in the case of submerged by mussy weave and machine ' s hot noise, dispersed target signal is feeble

    系統採用電臺的電視伴音調頻信號，其中電臺信號與伴音信號功率之比基本為10 ： 1 ，並且目標散射信號較弱，一般情況下淹沒在雜波和機器熱噪聲之下，採用常規的脈沖檢測方法很難對遠距離的目標進行檢測，而以電臺直達信號作為參考與目標回波信號進行相關檢測；系統中信號的相關處理會產生旁瓣，而強目標的旁瓣會影響附近的弱目標檢測。
  2. Secondly, the paper researches blind estimation of signals parameters, including the carrier frequency, signal to noise ratio and symbol rate of digital modulations. thirdly, with the combination of parameters from early studies on the decision theory, a set of robust feature parameters are extracted from signal power spectrum and the power spectrum of the second and fourth power of signal. based on these parameters, the proposed scheme is able to recognize 12 types of common used modulations, namely ask 、 2fsk 、 msk 、 4fsk 、 psk 、 qpsk 、 / 4qpsk 、 8psk 、 am 、 dsb 、 ssb 、 fm

    接著，對信號功率譜、平方譜及四次方譜進行研究，針對通信中常用的調制方式，結合前人提出的基於決策理論中的特徵參數，設計了一組對信噪比和信號調制參數不敏感的分類特徵參數，利用上述參數完成了一種基於信號頻域的識別方法，可以對ask 、 2fsk 、 msk 、 4fsk 、 psk 、 qpsk 、 / 4qpsk 、 8psk 、 am 、 dsb 、 ssb和fm這12種常用調制方式進行識別。
  3. That noise fm signal emalates tv sound fm signal researchs above two question about correlative detection and restrainning sidelobe. the research ' s result is compared with linear fm emulational research ' s

    用噪聲調頻信號對電視伴音調頻信號進行模擬研究上述提到的相關檢測和旁瓣抑制問題，並與線性調頻信號模擬研究相比較。
  4. Asu automatic interference suppression for car radios suppresses ignition noise in the fm band

    調頻干擾自動抑制，在汽車收音機中附加入此電路即可抑制高壓點火噪音的干擾
  5. Because the noise that affects radio signals is partly, but not completely, manifested in amplitude variations, wideband fm receivers are inherently less sensitive to noise

    因為影響到無線電信號的噪音只是部分的，而不是整體出現于波幅變化中，調頻寬頻的接收器自身對噪音不夠敏感。
  6. An analysis of quantization noise in fm transmitter at intermediate offset frequencies

    對調頻發射機在中頻偏移下的量化噪聲分析
  7. 3. in the process of restraining distance and doppler planar sidelobe, linear fm signal restrains sidelobe well, noise fm signal has definited impact on restrainning sidelobe in concrete circumstance by tring diversified methods

    3 、在二維距離-速度旁瓣抑制中，線性調頻信號抑制效果良好，而抑制噪聲調頻信號的旁瓣須根據具體情況、用多種方法進行嘗試、有一定旁瓣抑制效果。
  8. Compared with dcsk modulation, the fm - dcsk modulation changed the chaotic signals with random magnitude into the signal with constant magnitude and random frequency, thus the systemic noise performance is achieved

    將振幅隨機變化的混沌信號變為頻率隨機變化而振幅恆定的混沌fm信號，降低了系統的誤比特率。
  9. Some valuable conclusions are given by simulation experiments for a kind of anti - radiation - missile attacking dual sources. 6. the method for prs counteracting interference of two noise fm jammers is presented

    對于兩個頻基本重疊的窄帶瞄準式噪聲調頻干擾源，提出了prs跟蹤兩個干擾源中大功率源的方法。
  10. The performance of the system using enhanced fm - dcsk technique is evaluated in context of noise, multipath channels

    在多徑傳輸的條件下，改進的fm - dcsk系統的性能也優于fm - dcsk系統的性能。
  11. Route fm / am antenna cable, bus cable, rca interconnects, and power supply leads as far apart from each other as possible, to prevent noise interference

    使fm / am天線電纜、總線電纜、 rca互連器和電源線相互之間盡量遠離，以防止噪音干擾。
分享友人
分享到 Line

分享到臉書