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[电子]镜像频率
1、frequency equation───频率方程
2、frequency polygon───[统计]频数多边形
3、cumulative frequency───[统计]累积频率，[电子]累积频数
4、frequency modulation───调频
5、frequency range───频带; 频段；[电子][通信]频率范围
6、frequency───n.频率；频繁
7、cutoff frequency───截止频率
8、image───n.影像；想象；肖像；偶像；n.(Image)人名；(法)伊马热；vt.想象；反映；象征；作…的像
9、frequency generator───[计]频率发生器
1、by using the analog devices, the conventional quadrature coherent detector may result in the large image frequency errors.───传统的正交相干检波器由模拟器件构成，存在较大的镜频误差。
2、The Automatic Fringe Distinct Technique in White Light Digit Speckle Image Frequency Recognition-Digit Phase Shift Method───白光数字散斑图像频域自动识别技术——用于逐点分析的数字相移法
3、Examples show that this method can decompose the image frequency for gradually reduced N-and IMF and the remainder.───实例表明，此方法能较好的将图像分解为频率逐渐减小的N个IMF和余项的和。
4、main structure of the mixer adopts two symmetrical single-balanced mixers, with phase-shifting of the up and down path signals to eliminate the image frequency.───混频器主结构采用两只对称的单平衡混频器组合，通过上下两路信号移相来达到消除镜频的目的。
1、Generalized algorithms are proposed for linear phase paraunitary filter banks with pairwise mirror image frequency responses. The proposed algorithms promote fast convergence of design process.
2、The main structure of the mixer adopts two symmetrical single-balanced mixers, with phase-shifting of the up and down path signals to eliminate the image frequency.
3、When it is realized by using the analog devices, the conventional quadrature coherent detector may result in the large image frequency errors.
4、The multiresolution structure of wavelet is used to construct the image frequency components. , which has better image fidelity preservation and robustness than spatial domain based techniques.
5、I/Q imbalance problem causes finite rejection in the image frequency band, and the image interference will alias into the desired signal, severe distortion will occur.
6、Examples show that this method can decompose the image frequency for gradually reduced N-and IMF and the remainder.