frequency aliasing
英 [ˈfriːkwənsi ˈeɪlɪæsɪŋ]
美 [ˈfriːkwənsi ˈeɪliəsɪŋ]
网络 频率混淆; 频率混叠; 频次混开
双语例句
- A wavelet packet frequency-shift algorithm for remote sensing image fusion was introduced to solve the problem of serious frequency aliasing caused by dyadic-down sampling.
在基于小波包的遥感图像融合应用中，引入用于调整小波包分解频率顺序的小波包移频算法来解决由于间隔采样而导致的频带混叠现象。 - If the sampling frequency is less than this, we can expect a serious distortion of output frequency which is generally referred to as aliasing.
如果取样频率小于此数，那么输出频率就要产生严重畸变，通常假频指的就是这种情况。 - ALF low-pass filter circuit is used to filter out high frequency harmonics, preventing the occurrence of aliasing effects.
ALF低通滤波电路将高次谐波滤除，防止了混叠效应的发生。 - The wavelet packets technique was introduced into the application research on diesel engines 'vibro acoustic signatures extraction. The reason of the existence of frequency aliasing in the Paley series from wavelet packets' decomposition was analyzed, and the wavelet packets frequency shifting algorithm was given.
将小波包技术引入柴油机振声征兆提纯的应用研究中，分析了小波包分解得到的Paley列存在的频率混叠现象的原因，给出了相应的小波包移频算法。 - The sampling rate of the bandpass signal is exactly twice that of the in-phase and quadrature components obtained at the output. The sampling frequency determination and the lowpass anti-aliasing filter design are Straightforward.
带通信号实际采样率仅为输出端所获同相分量和正交分量采样率的两倍，可以直接确定采样频率和设计低通抗混叠滤波器。 - If the surface of measured object is complex or the pattern is seriously polluted by noise, the perfect foundational frequency is difficult to extract by filtering because of frequency aliasing, which results in incorrect 3D reconstruction of the object.
当被测物体形状复杂或被噪声严重污染时，频域中频谱分布展宽，可能发生频谱混叠，导致基频分量提取不完整，从而不能正确地恢复出被测物体。 - Matched z-transform is a digital method by which analog controller is transferred to digital controller. If imaginary part ω 0 of zero of analog controller is more than one half of sampling frequency ω s, frequency response of the digital controller can be aliasing.
匹配Z变换是将模拟控制器变为数字控制器的一种数字化方法，若模拟控制器的复数零点的虚部ω0大于采样角频率ω的一半，这时数字控制器的频率特性将会产生严重混叠。 - For bandpass signal under digital quadrature sampling, there is spectrum shifting. Although the sampling frequency satisfies the sampling theorem, it may cause spectrum aliasing.
在数字正交采样中，带通信号存在频谱迁移问题，虽然满足带通信号的采样定理，仍可能产生频谱混叠。 - In this paper, we have researched the FTP, first we propose an improved FTP based on two-frequency grating projecting, which are involved in the problems of the phase unwrapping and the frequency selection to satisfy the two carrier frequencies no frequency aliasing.
本文研究了FTP的相关问题：（1）提出双频光栅FTP，并深入讨论了为消除频谱混叠，两个载频之间所必须满足的频率选择关系以及相位展开问题； - Multiple Embedded Algorithm with Grey-level Blind Watermarking in DCT Frequency Domain Based on Aliasing Spectrum
基于混叠DCT频域灰度级盲水印多重嵌入算法