它可强制滤波器组的频率特性在零频形成零点并使旁瓣面积最小。
It can constrain frequency response of filter Banks to form null at zero frequency point and to obtain minimum side lobe area.
利用干涉图的零频分量消除光源谱分布的影响，获得两束干涉光的振幅比；
The effect of the light source spectral distribution can be cancelled out with the help of the zero order spectrum of the Fourier transform of the interferogram.
平地效应使干涉纹图中的主要频率不在零频，不能反映实际地面高程的变化。
The flat-earth makes the main frequency of the interferogram not at the zero frequency, and can't reflect the change of the topographic altitude.
时域局部人工边界是以行波概念为基础的，原则上不能用于模拟零频分量（消减运动）。
Local artifical boundary condition in time domain is based on concept of travelingwave. It cannot simulate zero-frequency component(evanescent motion) generally.
国外在这方面有较系统的研究，并提出了一种预测零频到超声波频率之间全部速度频散的分析技术。
It has been researched systematically on abroad, and an analysis technology was put forward to predict all the velocity's dispersive of frequency from zero to ultrasonic frequency.
对空间滤波法的零频滤波与刀口滤波显示位相型物体的非均匀位相分布进行较为普遍且详尽的分析讨论，并给出一些实验结果。
Universally analyzed and discussed in this paper is the visualization of inhomogeneous phase distribution of phase objects with spatial zero frequency filtering and knife edge filtering method.
本文针对有载波偏移的零中频bps K调制信号提出了一种软件解调系统。
The paper presented a software demodulating system of BPSK zero-IF signal containing carrier offset.
利用电力系统三相交流电压过零点和高速数字频率合成器解决了跳频系统中同步和快速频率合成的两个关键问题。
The zero-crossings of the AC voltage and digital frequency synthesizer are used in solving the two main problems in frequency hopping system-synchronization and fast frequency synthesizing.
采用该算法可以方便地测量多频连续波雷达系统的零距离，提高雷达系统的测距精度，减小测距的系统误差。
Using this algorithm, the zero range in CW radar can be measured conveniently with range accuracy improved and range system errors decreased.
结果表明，各种时频分析方法对零部件类型的敏感程度有所差异。
The results showed that the sensitivity of time-frequency methods on different type of components is different.
该滤波器通过处理输入离散采样信号获得连续信号并抑制谐波噪声，改进了过零测频方法。
The filter processes input discrete sampling signal to recover continuous signal and suppress harmonic noise, and the zero-crossing frequency measuring method is improved.
介绍了两个可以用于多信号测电子科技大学博士论文频的技术：频率信道化和过零点谱分析。
Two technologies, spectral channelization and spectral analysis with zero crossing that could be both applied to multi-signals, are also introduced.
设计了一种用于零中频gps接收机的低闪烁噪声混频器。
A low flicker noise mixer for zero-IF GPS receiver is presented.
在信道阶数未知情况下，对其导频采用循环前缀（CP）方式和补零（ZP）方式的性能做了比较分析。
The performances for both cycle prefix (CP) and zeros-padding (ZP) mode pilots are compared and analyzed in the case of unknown channel order (UCO).
该系统通过采用正交双通道零中频处理量化相位，处理效果较佳。
The system uses the method of orthogonal double-channel zero intermediate-frequency, and the result is satisfying.
本文还对零中频接收机的直流漂移问题及其解决方案进行了分析。
The analysis and solution to DC shift of if receiver are also mentioned.
介绍了用零中频技术将扫频仪改造成频谱仪的一种方法。
This paper presents a new method for Sweep Oscillator transform to the Spectrum Analyzer by Zero-IF technique.
无碰撞区跳频通信系统的跳频器所使用的跳频码是无碰撞区跳频码，该码在零位移附近一段区域内汉明相关值为零。
The No-Hit-Zone (NHZ) hopping code is employed by the frequency hopper of NHZ FH communication systems, which have no hits at all within a predefined correlation zone in the vicinity of zero shift.
提出了一种基于嵌入式平台的超高频rfid读写器的实现方案，接收机采用零中频检波技术。
This paper proposed a novel mechanism of implementing an UHF RFID interrogator based on Embedded Platform, the receiver architecture used Zero-IF Detect Structure.
看频会议零碎的看频输出。
标签LFMCW雷达非线性剩余频差过零检测周期图。
LFMCW radar nonlinear residual frequency errors zero crossing detection periodogram.
接收机采用零中频直接变频方案，电路简化，可有效地降低成本。
The zero IF technology is used in the receiver which can simplify the reader circuit and reduce cost significantly.
卖进行证人远程作证，或是异地审判时，可以经过看频会议零碎来进行交互。
When the remote witness testimony or the off-site trial is conducted, the interaction is able to be done with the video conferencing system.
提出一种在零前缀正交频分复用（ZP-OFDM）系统中，估计符号定时和载波频偏的算法。
The methods propose to utilize the zero padding prefix(ZP) characteristic of ZP-OFDM systems.
因此提出了一种改进的过零检测算法：零点斜率测频法。
An improved method which measures frequency through the slope of zero based on the cross-zero detecting is presented.
并通过PLC、MI、频器、近开关、速度传感器等组成的控制系统完成了对零部件的振动试验。
The testing system was mainly composed of PLC, MMI, frequency converter, approach switch and acceleration transducer.
为达到较高的集成度，射频接收机一般要求使用尽量少的片外元件，因此零中频结构将会受到越来越多的关注和应用。
Zero IF architecture is preferable to SOC system because of fewer off-chip devices. Here, it introduces different RF receiver architectures in the paper.
为了研制低价格、低功耗、小尺寸的OFDM终端，零中频的接收机结构越来越倍受关注。
The architecture of zero IF receivers that has the advantage of low-cost, low power dissipation and small from factor is gaining interest while developing OFDM terminal.
文中最后部分对零中频接收机的应用进行了展望。
It is the last part of the application of zero-IF receiver prospect.
死区时间的合理选择是保证移相定频控制的全桥零电压开关DCDC变换器零电压开关状态的必要条件。
Proper selection of the switching dead time of the lagging arm is necessary for ensuring the ZVS operation of the phase shifting FB ZVS DC DC converter.
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