調頻法 的英文怎麼說

中文拼音 [diàobīnfǎ]
調頻法 英文
frequency modulation method
  • 調 : Ⅰ動詞1 （配合得均勻合適） harmonize; suit well; fit in perfectly 2 （使配合得均勻合適） mix; adju...
  • 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...
  • 法 : Ⅰ名詞1 （由國家制定或認可的行為規則的總稱） law 2 （方法; 方式） way; method; mode; means 3 （標...
  • 調頻 : frequency modulation （fm）; frequency adjustment調頻磁帶錄音機 f m magnetic tape recorder; 調頻...
  1. In this dissertation, the analog - digital channelized receiver is studied. the optimized system, spectrum reconstructing and accuracy signal frequency estimation algorithms are researched

    本文研究了模數混合通道化接收方案，著重研究其優化結構和關鍵技術以及線性調頻信號參數估計演算法。
  2. Digital frequent demodulation method of control system ' s fsk signal

    信號的數字頻域解調方法
  3. By analysis, two kinds of caq are found : one is width - modulated countable pulse series, the other is frequency - modulated countable pulse series. furthermore, the method of generating caq is described and its double features is also proved

    通過分析找到兩種計數型模擬量：調寬計數脈沖串和調頻計數脈沖串，同時本文也闡述了計數型模擬量的產生方法，並進一步驗證了它的二象性特徵。
  4. Based on the theory of pulse compression, the essentiality of lfm signal is discussed

    首先介紹了線性調頻信號脈沖壓縮的實現方法。
  5. Velocity measurement using single linear frequency modulation pulse

    單個線性調頻脈沖信號測速方法之研究
  6. The method can be applied when the size of hull grillage beam and exciting frequencies cannot be easily changed

    該法適用於船體板架尺寸、激勵頻率不易改變的調頻情況。
  7. Technical parameters and measuring methods for fm broadcasting transmitters - monophonic and stereophonic

    調頻廣播發射機技術參數和測量方法單聲和立體聲
  8. 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。
  9. Methods of measurement on radio receivers for fm broadcast transmissions

    調頻廣播接收機測量方法
  10. It points out that the uwb signal can be reconnoitered efficiently with sub - sampling method. 3

    說明了利用欠采樣方法對超寬帶線性調頻信號偵察的可行性。
  11. The device has more advantage than traditional adjustable ac high voltage design. it adopts adjustable method to make adjustable series resonance even easier and the change extend of tested much wider. it is fit to test the majority of electricity system design

    該裝置與傳統的調感式交流高電壓裝置相比具有更多優點，採用調頻方法使調節諧振更容易，被試品的變化范圍可以更大，適合大多數電力系統裝置的試驗。
  12. This device realizes series resonance between high voltage inductance and tested capacitance. because of series resonance a higher voltage exists on the tested capacitance than the power ' s output. so a new ac high voltage test way to large capacity sample comes true

    該裝置以調頻的方式實現高壓電感和被試品電容的串聯諧振，從而在被試品上得到高於電源輸出端的電壓，即實現了以小容量電源對大容量試晶進行交流耐壓試驗的一種新方法。
  13. Technical parameters and measuring methods for fm broadcasting coder - stereophonic

    調頻廣播編碼器技術參數及測量方法立體聲
  14. Two detection methods of chirp signals are presented in the dissertation : the cyclic autocorrelation detection method and the correlation detection method of cyclic autocorrelation function. it is shown that the two methods both have an excellent performance of blind detection. the performance analyses of the two detection methods are both carried out for additive noise or multiplicative noise, and the output signal - to - noise ratio ( snr ) expressions of the two methods are also derived

    通過研究提出了兩種線性調頻信號的檢測方法?基於循環自相關函數包絡的檢測方法和基於循環自相關函數的相關函數包絡的檢測方法，兩種方法均可實現信號的盲檢測，有良好的檢測性能，文中還分析了加性噪聲及存在乘性和加性噪聲情況下兩種檢測方法的性能，推導出了輸出信噪比公式。
  15. As an example, the detection problem of noise frequency modulation jamming signal was analyzed, two accumulation detection methods, direct accumulation detection and binary accumulation deteceion, were proposed, and the detection probability of the two methods was calculated

    摘要以噪聲調頻干擾為例，對干擾信號的檢測問題進行了分析，提出直接積累檢測和二進制積累的檢測方法，並計算了兩種方法的檢測概率。
  16. Presents the model proposed for analyzing the vibration characteristics of shrouded blades and their calculation method by employing a wave propagation theory and modal synthesis technology coupled with a finite element method from the view point it is possible not only to conduct frequency modulation of the shrouded blades of a gas turbine, but also to utilize the friction effects between them to dissipate energy, thereby attaining the aim of vibration alleviation, as shrouded blades have been widely used in the design of high - speed turbomachinery, such as modern gas turbines and steam turbines, and with the shrouded blades forming an integral whole in a centrifugal force field, the vibration characteristics of the whole ring of blades are different from those of a single isolated blade, and this makes it essential to take into account the integral effect of blade shrouds, concludes from the calculation examples and engineering application that the above approach is valid and correct along with the possibility of considerably reducing the scale of calculation and analysis, and points out it is necessary to take into consideration the coupled effect of the whole ring of blades while the dynamic characteristics of shrouded blades is being analysed

    帶冠葉片不但能調頻，還可以利用葉冠之間的摩擦效應來耗散能量，達到減振的目的.帶冠葉片在離心力場中形成一整體，其整圈葉片振動特性不同於單個孤立葉片，需考慮葉冠的整體效應.利用帶冠葉片系統的循環對稱性，提出了採用波傳播理論和模態綜合技術，結合有限元方法研究燃氣輪機帶冠葉片振動特性的分析模型和計算方法.算例和工程應用證明了該方法是效性的、正確的，並可以大大降低計算分析規模.研究表明帶冠葉片動力特性分析時必須考慮整圈葉片的耦合效應
  17. In this dissertation the pulse compression performances of linear frequency modulation signals ( lfm ), nonlinear frequency modulation signals ( nlfm ) and design of their side - lobes suppression filters are analyzed, and design of the pulse compression program of 4 pieces of adsp21160 in the processing unit and the program of single piece of adsp21160 and fpga in the interface unit of the pulse compression system are introduced in detail

    全文分析了線性調頻信號（ lfm ） ，非線性調頻信號（ nlfm ）的頻域脈沖壓縮方法及其旁瓣抑制濾波器的設計和優化，詳細介紹了脈沖壓縮系統中基於4片adsp21160的處理單元和單片adsp21160和fpga組成的介面單元的軟體設計。
  18. Based on the method, this dissertation deals with several kinds of signals including cosine wave ( cw ), linear frequency modulated ( lfm ) and multi - component signal, furthermore the systematic comparison of estimation effect among cwt and several other usual methods as well cramer - rao bound ( crb ) is given

    基於上述方法，文中分別對單頻矩形脈沖信號、線性調頻脈沖信號以及多分量信號進行了瞬時頻率估計，並與其他幾種常用瞬時頻率估計方法的性能以及crb進行了系統比較。
  19. During the instantaneous frequency estimation of lfm, there exists some error in the edge, so in the dissertation, a fitting method is proposed to modify it. from the computer simulation, the following result is obtained : for cw, the method based on cwt is most effective, and with the snr rising, the error curve of it is more and more closer to crb. for lfm, the method based on wvd gives the best result, and the effects of cwt and stft are similar for multi - component signal, compared to stft and wvd, cwt is a better choice

    通過模擬發現，在單頻回波的瞬時頻率估計中，基於cwt的方法最為有效，隨著信噪比的提高，其均方誤差曲線越來越接近克拉美?羅界；在線性調頻回波的瞬時頻率估計中， wvd法得到的效果最好，而cwt與stft法的估計效果比較接近；在多分量信號的瞬時頻率估計中，相對于stft和wvd法， cwt法是一個更好的選擇。
  20. As we have introduced a multilevel decision method with discriminator detection to improve the error rate performance, the deducing and analyzing for this method are present in this article. the theoretical error rate and the monte carlo simulation result are showed in figure to compare the system error rate performance affected by different premodulation filter

    在系統誤碼模擬中引入了一種有助於改善誤碼性能的鑒頻加多電平判決的解調方法，文中對此方法也進行了詳細的推導和分析，並給出根據此方法計算出的誤碼理論值，結合系統誤碼性能的蒙特卡羅模擬值，對比分析各種預調濾波器對系統誤碼性能的影響。
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