signal modulation的例句大全

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。

Secondly, it introduces the frequency selection, EMC ( Electromagnetic Compatibility), the basic generation theory and modulation of the third civil signal ( L5 signal), including LS ranging code, Forward Error Correction, QPSK modulation and Neuman.

其次，介绍了其信号的频段选择、电磁兼容性及其调制和产生的基本原理，包括L5测距码、卷积码、QPSK调制以及Neuman。

LFM can be demodulated by the same arithmetic as for FM, and the demodulated signal takes on the shape of saw-tooth-wave and the period of LFM can be estimated while modulation slope can't because of arctan operation.

LFM信号可以用实现FM的方法来进行解调，解调信号呈锯齿状，可以从中获得调制信号周期，但是因算法中存在反正切运算，致使无法从中获得LFM的调制斜率。

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。

Analysis of Partial Correlation Digital Pulse Compression of Linear Frequency Modulation Signal

LFM信号的部分相关数字脉压分析

Crosstalk of Signal in Pump Probe Structure with Self-Phase Modulation and Cross-Phase Modulation

自相位调制和交叉相位调制共同作用下抽运探测波结构中的信号扰动研究

A method to identify the modulation levels of M-ary Quadrature Amplitude Modulation ( M-QAM) and M-ary Amplitude shift keying ( M-ASK) was developed to rapidly and automatically identify the modulation levels of digitally modulated signals at low signal-to-noise ratios ( SNR).

为了快速自动识别低信噪比下的数字幅度调制进制，提出了一种识别M进制正交幅度调制（M-QAM）和M进制幅度键控（M-ASK）的调制进制的方法。

Based on the discussion on LFM signal, this paper studies several jamming methods and presents the simulation experiments, including: directed noise amplify jamming, phase modulation jamming, time-delayed jamming, frequency-shift jamming, etc.

在分析线性调频（LFM）信号的基础上，研究了多种基于DRFM的雷达干扰技术，仿真验证了干扰效果，包括：射频噪声干扰、噪声调相干扰、延时干扰和移频干扰等。

The conclusion was verified by simulation signals with different noise intensity and rolling bearing's defect vibration signal. Analysis shows that the proposed method is more effective than direct modulation or time delayed autocorrelation demodulation in denoising or clarifying modulation information.

不同噪声强度仿真数据和滚动轴承故障振动信号实验数据分析表明，该方法比直接解调或仅采用时延相关解调更能有效抑制噪声，凸现信号调制信息。

Through analyzing the characteristics of SAR echo signal, a new DECM approach ( False Image Jamming Based on Phase Modulation) is proposed.

对该方法的干扰原理进行了深入分析并进行了仿真实验。

The generation of modulation signal, synchronous demodulation and signal processing in R-FOG can be realized in a single FPGA.

在单片FPGA上实现了集调制信号产生、同步解调及信号处理等功能的检测电路。

While a sine-wave modulation signal is shown, any wave shape could be used.

然而当正弦 波调制信号 显示时, 任何波形都可以使用.

The number of discrete signal elements that can be transmitted in a given modulation scheme.

在给定调制电路中能被传送的离散信号码元数.

Through the experimental test on integration of modulation circuit and demodulation circuit, it indicates that there is high signal-to-noise ratio in the system.

通过对调制驱动电路和接收解调电路组成的激光通信链路的实验测试，表明所设计的光端机具有良好的信噪比。

Theoretical study of frequency chirping of wavelength-converted signal by cross-phase modulation using linear optical amplifier

基于线性光放大器的交叉相位调制波长转换啁啾特性研究

This paper discussed the based theory of modulation method, demodulation method, the constitution of message source, technological form of signal and pseudo code position of the new-typed system.

详细的讨论了新型NAVTEX系统所采用的调制解调方式、信源的建立、信号的技术格式、伪距导航定位原理等基本的理论。

This paper describes an important part of subscriber line interface circuit in digital telephone switching systems the new generation Codec based on DSP ( Digital Signal Processing) and ΣΔ modulation technologies.

介绍了数字电话系统中用户线接口电路的一个重要电路&基于数字信号处理（dsp）和∑Δ调制技术的新一代编解码器（codec）。

The design of software is finished based on the completed design of universal hardware platform, including signal source module, terminal module, modulation module, demodulation module, controller module and LCD/ keyboard module.

在完成通用硬件平台设计的基础上，完成了实验系统的软件设计，包括信号源模块、终端模块、调制模块、解调模块、控制器及液晶键盘模块共六部分。

Automatic identification of the digital modulation type of a signal has found applications in many areas, including electronic warfare, surveillance and threat analysis.

信号的数字调制类型识别在电子战、电子侦察和威胁告警等领域有广泛的应用前景。

By controlling the position of the mirror and the beam splitter, it gets three beam, four beam, six beam interference modulation map on the CCD, for image acquisition and signal processing respectively.

用633nm小激光器搭建激光干涉实验系统，通过控制反射镜、分束镜的位置，在CCD上成像得到了三光束、四光束、六光束激光干涉调制图，分别对其进行图像采集和信号处理。