signal frequency

Based on the Fourier transform analysis of saw tooth signal frequency modulation, the concept of power spectrum spread attenuation factor in the case of barrage jamming is presented.

首先通过对锯齿波调频的傅里叶变换，提出了阻塞式干扰下功率谱扩展衰减因子概念；

It produces the primary signal first to carry on the display of time domain, the display of frequency domain and frequency spectrum, and compose the observing signal; finally it carries on the correlation analysis again after the signal filtered to remove the harmonic interference signal.

首先是对原始信号进行时域波形显示，频域频谱显示，初步观察信号的组成，最后再对滤波后的信号进行相关分析，除掉谐波干扰信号。

Application of Global Position System in Measuring Signal Frequency and the Stability of Signal Frequency

全球定位系统在频率及其稳定度测量中的应用

As the variations of the signal frequency, the real number of samples in one cycle changes with the fluctuation of signal frequency which will lead to sampling synchronous deviation.

然而由于电网频率的波动，实际上一个周期内的采样点数N是随频率的变化而变化的，因此必然存在同步偏差，影响测量精度。

An Analysis of Noise Bandwidth after Doubling the Signal Frequency

信号倍频后噪声频宽的分析

Any device that's built to receive a wireless signal at a specific frequency can be overwhelmed by a stronger signal coming in on the same frequency.

任何以特定频率接收无线信号的设备都可能被在相同频率上进入的更强的信号所覆盖。

The DDS signal generator which can adjust signal phase signal frequency and complex wave is designed.

最终实现频率、相位、复合波形皆可调节的直接数字合成的信号发生器.

Experimental results show that this method can measure the signal frequency error effectively and accurately.

实验证明，该方法能够有效地精确测量信号的频率误差。

With the right device tuned to the right frequency, what's to stop a thief from jamming your setup and blocking that alert signal from ever reaching the base station?

一个合适的设备调到一个合适的频率时，怎样才能阻止窃贼破坏你的装置，阻止警报信号传达至基站呢?

This method ( reflects) the effects of signal frequency and communication terminal speed.

该方法较好地模拟了信号载波频率和通信终端移动速度的影响。

As the addition of signal frequency, oscillograph will drop to demonstrating ability correctly of signal.

跟着信号频率的增添, 示波器对信号的正确显示能力将回升.

Signal Frequency Real-time Acquisition and Processing System of 10 cm Beacon Receiver

10cm信标机信号实时采集及处理系统

By peak value sampling the information of baseband signal can be obtained from an AM signal directly. By frequency conversion sampling the carrier wave's frequency of a PSK signal can be cut down.

对AM信号进行峰值采样可以直接获得基带信号的信息，对PSK信号进行变频采样可以降低其载波频率。

In that case, it was necessary to do in-depth research on the influence of taste cell sensor response characteristics excited by changing signal frequency condition.

本文针对激励信号频率条件改变对味觉细胞传感器响应特征的影响进行了深入研究，以STC-1细胞和小鼠味蕾细胞为苦味传感器的敏感元件，在广泛的频率范围内研究了苦味的响应特性。

a high frequency signal

高频信号

Application of method of binary wavelet transformation in resolution of earthquake precursor signal frequency

二进小波变换在地震前兆信号频率分解中的应用

The dissertation introduces the designing idea and technological data of array antenna, radio frequency processing and signal processing module.

论文介绍了天线阵、射频处理、信号处理等模块的设计思路和技术指标。

Based on the analysis of the sensor signal frequency spectrum is made with a SD 2380 instrument.

在分析该传感器信号的基础上,用SD2380动态分析仪作了频谱分析.

Using frequency transformation and frequency synthesis techniques, we transferred electric commumication clock signal to 1 MHz integer frequency. realized high accuracy measurement of electric communication clock signal frequency and frequency sta-bility utilizing existent frequency comparator again.

利用频率变换和频率合成技术，将电信时钟信号频率转换为1MHz整数频率，再利用现有的频标比对器，实现电信时钟信号频率和频率稳定性的高准确度测量。

Two-Dimensional ESPRIT Method for Sinusoidal Signal Frequency Estimation

二维正弦信号频率估计的ESPRIT方法研究

The technology of direct digital frequency synthesis ( DDS ) , is a new typed synthesizer technology and signal frequency methods.

直接数字频率合成技术,即 DDS, 是一种新型的频率合成技术和信号产生方法.

This method plays an important role in the detection of communication signal such as multi-frequency modulation signal and time-frequency code signal.

它可以把多个正弦信号相干累加到一条谱线上，从而可以在很低信噪比下有效检测信号，在多频率调制和时频二维编码等通信信号检测上有重要应用价值。

In modern Sonar equipment the several signal operation modes are usually required, for instance, the keying single frequency signal operation mode, the keying frequency modulation signal operation mode and etc.

在现代声纳中常要求在一部声纳中同时具有几种信号工作方式的功能，例如单频脉冲信号工作方式、键控式调频信号工作方式等等。

The contact impedance include three parts: contact resistance, contact capacitance, contact inductance. The main factors affecting the impedance of contact spot include signal frequency, the topographic and the component of the corrosion products.

论文对触点的阻抗模型做了分析，触点的接触阻抗包括接触电阻、接触电容以及接触电感三部分，影响触点阻抗的主要因素有信号频率、腐蚀物的形貌以及腐蚀物的成分。

This method combining the adaptive Funnel filter ( AFF) with sliding Goertzel algorithm ( SGA) can accurately track the signal frequency and calculate the phase difference between two signals.

该方法将自适应Funnel滤波器（AFF）和滑动Goertzel算法（SGA）结合起来，能够精确地跟踪信号的频率，计算相位差。

The Study of Motor Fault Signal Frequency Pursuit Based on Hilbert-Huang Transform

基于HHT变换的电机故障信号频率分析

Fabric defect is singular signal, wavelet transform provides a multiresolution framework, has good time-frequency characteristics, so it has theoretical significance and application value to discuss defect detection and recognition in wavelet domin.

织物疵点是奇异信号，小波变换提供了一种多分辨率框架，具有良好的时频局部特征，因此，研究小波域的特征的疵点检测与识别具有理论意义和应用价值。

They can also be helpful if the original signal frequency does not fit in the DUT testing frequency.

如果原始信号频率不适合于DUT的测试频率，信号滤波也非常有用。

That is mixing the baseband signal ( linear frequency modulation signal and sinusoid signal) with two orthogonal local oscillated signal generated using direct digital synthetic technology to move the baseband signal to intermediate frequency band.

同样运用直接数字合成技术产生基带信号&线性调频信号和正弦信号，与本地载波混频后，将其频谱搬移到中频，完成数字上变频。

Crosstalk coupling was analyzed between two parallel transmission-lines with common ground. Results were obtained on relations of coupling responses to signal frequency, distance of two line and height to ground.

对共地平行传输线间的串扰耦合进行分析，得出耦合响应与信号频率、线间距及线距地高度的关系，给出电子电路设计中传输线布设的原则。