餘弦信號 的英文怎麼說
中文拼音 [yúxiánxìnháo]
餘弦信號
英文
cosine signal-
Based on the theories described above, calculation formula of general dimension of least square measure and multi - fractal fault diagnosis and analysis system have been established with borland c + + builder 5. 0, and checked by pure sinusoidal and cosine signal and sinusoidal signal with noise, and verified by the examples
基於上述原理，建立了最小二乘法的廣義維數計算公式，用borlandc + + builder5 . 0編制了以廣義維數計算分析為基礎的多重分形故障診斷系統，並對標準的正弦信號、餘弦信號及帶有噪聲的正弦信號進行了驗證。Fpga and dvb standard are introduced firstly, dvb - c standard and composition of its system are analyzed completely, development of modulator structure and dvb - c digital modulator composition are presented, more over, analysis of respective modular are given. then, principle of dvb - c digital modulator system are presented, they are error control technique 、 mqam 、 nyquist rule and root raised cosine filter 、 window design method for fir filter 、 multi - rate signal processing ( integer interpolating, conversion of fractional sampling, equal conversion of net structure, polyphase structure for filter, poly - phase structure for interpolator, multi - stage implementation of samplying conversion ) 、 distrubited algorithm 、 cic filter 、 dds 、 cordic algorithm
接著，專門利用一個章節闡述了dvb - c前端調制系統原理，他們了差錯控制技術、多進制調制（ mqam ） 、 nyquist準則與平方根升餘弦濾波器、有限沖擊響應濾波器的窗函數設計法、多抽樣率信號處理包括（整數倍內插原理、分數倍抽樣率轉換、網路結構的等效結構、濾波器的多相表示、內插器的多相表示、抽樣率轉換的多級實現） 、分散式演算法、 cic濾波器、直接數字頻率合成（ dds ） 、 cordic演算法。Based on the lambert law of cosines, a form of ladar equation, which is easy to apply, is deduced. an effective method of calculating the maximum detectable distance is proposed based on the theory of signal detects statistics
根據朗伯餘弦定律推導出激光雷達方程的一種便於使用的形式，根據統計信號檢測理論提出了一種計算作用距離的有效方法。Analyze, design and simulate the digital down - convert frequency. first, the analogue if signal is converted to digital if signal in one a / d convertor which used passband sampling theory. the digital if signal is then passed to a pair of digital mixers operating in phase quadrature for mixing the if signal to baseband signal
首先利用帶通采樣定理對中頻模擬信號進行a / d變換后將其混頻到基帶，然後用平方根升餘弦滾降濾波器同時完成低通濾波和匹配濾波雙重作用，以提高解調器的效率。This paper include the following parts. firstly the sine exciting - voltage is guaranteed by direct digital synthesize technology ; secondly the digital output of cos ( 9 ) and sin ( 9 ) are generated by microcontroller ; thirdly the two voltage signals which are the product of the two former signals gained by the multiplying d / a converter, being filtered and amplified, have constant frequency, and one amplitude has sine function relationship of with the input angle, and the other amplitude has cosine function relationship of with the input angle ; finally the two signals are acquired and analyzed by relative instrument and software
主要由以下幾部分組成：用數字頻率合成技術（ dds ）產生正弦激勵電壓信號u _ msin （ t ） ；用單片機產生幅度的數字量輸出sin （ ）和cos （ ） ；用乘法型d a轉換器實現激勵電壓和幅度的乘積，並通過濾波器和功放后即得到頻率固定，幅值隨輸入角成正餘弦變化的電壓信號；最後用數據採集卡採集輸出信號，顯示波形並進行頻譜分析。The discrete cosine transform can be implemented in a computationally efficient manner with stage i, the input signal is transformed into a corresponding signal constituted uncorrelated variables
第一級滑動離散餘弦變換能夠以高計算效率實現，將輸入信號變換為一個由互不相關變量組成的對應信號。Most of these standards are based on the method of inter - frame motion compensation and two - dimensional discrete cosine transform ( 2d - dct ) and encode and describe the color video in ycbcr 4 : 2 : 0 format, which want to take advantage of human visual system ( hvs ) to save bit expense by decreasing the resolution of two color difference components
當前國際上的壓縮標準普遍採用幀間運動補償加幀內二維離散餘弦變換的編碼方法，並且將彩色視頻序列表示為ycbcr格式，試圖利用人眼的視覺特性降低對色差信號的解析度來節省比特開銷。Lacking of space locality in time domain, fourier analysis can only make certain of the integral singularity of a function or signal. as a result, it is difficult to detect the spatial position and distribution of broken signal by fourier analysis. wavelet analysis has the characteristic of spatial locality, and its wideness in both windows of the time and the frequency can be adjusted, so it can analyze the details of a signal
經典的fourier變換把信號按三角正、餘弦基展開，將任意函數表示為具有不同頻率的諧波函數的線性迭加，能較好地刻劃信號的頻率特性，但它在時空域上無任何分辨，不能作局部分析，這在理論和應用上都帶來了許多不便。In the latter, that is in two - position alignment, the method of wavelet analysis is used to filter the output signal of optic fiber optic gyro, at last, the direction cosine matrix is gotten, the inertial components are demarcated,
在自對準中，利用二位置初始對準，運用小波分析對光纖陀螺的輸出信號進行濾波，並且確定初始方向餘弦矩陣並對慣性元件進行標定。Resolving - transformers is a kind of component that converts the rotor corners to electrical signals, one has sine functional relationship with the rotor - comers, while the other has cosine ones, and this component has been widely used in many fields such as automatic controls, aviation and firepower fields to implement the information transmission of shaft - angle between systems
正餘弦旋轉變壓器是一種將轉子轉角變換成與之成正餘弦函數關系的電信號的元件，被廣泛應用於自動控制、航空、火力控制等領域，以實現系統之間軸角信息的傳輸功能。This direction finding algorithm may resolve uncorrelated monochromatic sources, but it assumes that all signal frequencies are distinct. it requires no a priori knowledge of the signals " frequencies, suffers no frequency - doa ambiguity, and pairs automatically the x - axis direction cosines with the y - axis direction cosines
該演算法用單矢量水聽器，在無需知道信號先驗信息的條件下，可以實現對多個不相關信號的方位角估計，並且不受頻率模糊度的影響，自動匹配x軸、 y軸的方向餘弦。The watermarking scheme based on wavelet decomposition and discrete cosine transform using a binary pattern or gray - level pattern as the watermark, the scheme initially performs wavelet decomposition of the host image and the watermark with different hierarchy. after the pseudo - random permutation, each decomposed layer of the watermark is embedded into the dct domain of corresponding decomposed layer of the host image
基於小波分解和餘弦變換結合的水印方案演算法以二值圖標或灰度圖標作為水印，將原圖像和水印信號分別進行不同層次的小波分解，分解后的水印各分量偽隨機置亂後分別嵌入到原圖像相應分解層各分量的dct域中。Abstract : a method by using 8031 single - clip microprocessor to get the syntonical bit information is presented, based on the characteristic of the modulated singal in ascending cosine envelope. the timer is locked at the maximum of the wave peak. the experiment results indicate that this method is feasible for 2 400 bps system
文摘:利用升餘弦包絡調制信號的特點，即基帶信號為升餘弦波，接收端可以利用這一包絡，從中提取定時信息.提出了一種將時鐘鎖定到包絡峰值最大點的單片機實現的方法，從而完成了在接收端正確提取定時信息的任務分享友人