envelope of signal 中文意思是什麼
envelope of signal
解釋
信號包絡-
Since the envelope of modulated signal fluctuates, these methods generate unwanted intermodulation distortion ( imd ) products in a nonlinear radio frequency ( rf ) power amplifier ( pa ). so it is necessary to use linearization technique to reduce the adjacent channel interference ( aci )
但包絡變化的調制信號經過非線性射頻功放后會產生交調分量，因此必須採用線性化技術來減少由此產生的鄰道干擾。 -
The harmonic balance simulation and envelope simulation are applied in the cad progress of pulse oscillator, the results of simulation are listed, and the output signal of pulse oscillator is analyzed by mathematical method
以脈沖振蕩器的cad為例，對脈沖振蕩器分別進行諧波平衡模擬和包絡模擬，列出了模擬結果，並對脈沖振蕩器輸出信號進行數學分析。 -
According to the eer theory, using the amplified envelope signal as the power supply of the class - d amplifier, the envelope will modulate the magnitude of the rf signal. the modulated impulse rf signal is added to the impedance match circuit, so the amplified am signal is achieved
將放大的包絡信號作為class - d載頻放大器的電源，根據eer原理， class - d載頻放大器輸出載頻信號的幅度將受到包絡信號的線性調制，達到同時實現對載頻信號的放大和am調制的目的。 -
The paper includes four sections followed here : the first section studies the modeling of signals of pulse doppler radar seeker, and establishes a radar signal simulation model, including radar emitting signal model, receiving signal model, receiving echo signal model, clutter model, noise model, sum channel directional pattern of antenna model, difference channel directional pattern of antenna model, sheltering model, rcs model, glint noise model, etc. the second section studies signal processing of pulse doppler radar seeker, and establishes radar signal processing mathematical model and data processing mathematical model for simulation, including windowing, doppler filtering, envelope demodulation, pdi, cfar, centering, velocity tracking, angle tracking, a - b filtering, etc. the third section studies the modeling of modified proportion guiding, and establishes guiding model, then dynamic simulation results is provided
論文的主要工作包括四部分：第一部分研究了脈沖多普勒雷達導引頭的信號建模問題，建立了雷達信號模型，主要包括：發射信號模型、接收信號模型、目標回波信號模型、雜波模型、噪聲模型、和差通道天線方向圖模型、遮擋因子模型、接收機噪聲模型、目標雷達截面積統計性模型、目標角閃爍模型等。第二部分研究了脈沖多普勒雷達導引頭的信號處理模式，建立了信號和數據處理模型，主要包括：加窗和多普勒濾波、包絡檢波、檢波后積累、頻域cfar處理、速度定心、速度跟蹤、角跟蹤、 ?濾波等，然後給出了信號處理流程。 -
Wavelet analysis is used to translate noise signal of the engine into time - frequency domain. selecting appropriate frequency band to pick up and making its envelope spectrum, then two feature frequency - 0. 5x speed frequency and 2x speed frequency that represent the abrasion condition can be found. in addition, a new diagnosis method of image processing technique is proposed
利用小波分析將測得的機體噪聲信號變換到時頻域，選擇合適的頻帶加以提取並進行包絡譜分析提取包含特徵頻率的包絡，通過分析提取后的0 . 5倍頻和2倍頻分量，發現兩個特徵頻率可準確反映主軸承的磨損狀況。 -
If the signal is too strong a distortion, and not putting the drop - down sound, but the sound in order to lower the volume on the device parameters, or decreased synthesizer tone of the volume envelope
如果信號太強發生了失真，也不要下拉音量推桿，而應該在音序裝置上降低音量參數，或是降低合成器音色的音量包絡。 -
The quantized lp coefficients are replaced by the unquantized lp coefficients in the frequency domain expression of the feel weighted filter. the error signal has more similar envelope shape, and the hearing effect is better than before because the unquantized lp coefficients have more accuracy than quantized lp coefficients
由於未量化的線性預測系數具有更高的精度，因此，誤差信號通過修正後的感覺加權濾波器以後，具有與語音信號譜更加相似的包絡形狀，從而更好地利用共振峰對誤差的掩蔽效應，達到更佳的主觀聽覺效果。 -
The envelope singal of the fr signal is decteced
可譯為:頻率（響應）信號的包絡信號獲得了檢測 -
Then, digital quadrature envelope detection is used to detect the envelope of ultrasound as it is most used in the corresponding signal process. at last, we transform the signal to the range which can be displayed by the logarithm transform
有效補償了超聲傳播過程中的吸收衰減;並將正交包絡檢波技術用於超聲信號的幅度檢測;最後通過對數壓縮得到了顯示需要的灰階信號。 -
The method based on joint parameter estimation shows preferable performance almost at all times, in cases of various number of targets and various type of signal envelope
基於參數聯合估計的多目標定位方法在不同目標數目、不同信號包絡的定位實驗中都有較好的表現。
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