信号

Based on the research results of Chaos theory, in this dissertation, it has made detailed analysis of the chaotic signal generator. Firstly, the characteristic and various detection methods of chaotic signal are recommended. Secondly, with the aid of software, such as MATLAB, PSPICE, EWB, etc, discussion of the process of generating chaotic signal proceeds. Through simulation, the output result of several kinds of chaotic circuit are analyzed and compared. Thirdly, aiming at Chuas chaotic circuit, through debugging, the impacts by components and parts in the circuit, such as operation amplifier, capacity, inductor, etc, has been further investigated. And then provides a new scheme to implement Lorenz chaotic system, the circuit design and analysis are presented in detail and it can be realized by the hardware of programmable arrays FPGA, the experimental results indicate that this scheme has the advantages of easy operation, flexible design and high efficiency. An application example in secure communications is also provided. Finally, through picking up the characteristic parameter-Lyapunov exponent of the Chaos we can analyze the performance of different chaotic signal generators.

本文在混沌理论研究成果的基础上，对混沌信号的产生做了详细的分析，涵盖以下内容：首先介绍了混沌的定义，混沌信号的基本特性和各种判别方法，特别是对简单的一维Logistic映射的硬件实现问题做了初步探索；其次对混沌信号的产生方法进行讨论，借助于MATLAB、PSPICE、EWB等仿真软件，对几种混沌电路输出的混沌信号进行了分析比较，并在此基础上针对典型三阶连续自治系统Chua's电路作进一步实验研究，通过混沌电路调试，深入研究电路中各元器件，特别是运算放大器、电容、电感等对混沌信号时域以及频谱的影响；再次研究连续混沌系统的数字化硬件产生，设计了Lorenz混沌电路在现场可编程门阵列FPGA上实现的新方案，在保密通信中的应用实验结果表明该方案具有操作简单、设计灵活、效率高等优点；最后针对不同混沌系统，采取不同算法，提取混沌特性参数Lyapunov指数，进而对不同的混沌信号发生器的性能进行了分析。

Edsun-2010 phone signal s你好elding device (also known as mobile phone signal jammer / mobile phone signal blocking device / cell phone signal suppressor / cell phone signal blocker device / mobile phone signal isolator / Meeting Information confidential Mac你好ne) is a foreign company using advanced technology, According to the actual situation in the domestic mobile communications carefully the successful development of 你好gh-tech products, mainly for the following status

edsun-2010型手机信号屏蔽器(又名家机信号滋扰器/手机信号隔绝器/手机信号按捺器/手机信号阻断器/手机信号断绝器/集会信息保密机)是我公司接纳国外进步先辈技能，按照国内移动通讯实际环境精心研究制造乐成的高科学技术产物，首要针对以下几种近况

More specifically, the invention relates to an antenna (1) comprising: first (2) and second (3) linear sub-antennas which are equipped with sensors (21-2M, 31-3N) forming first and second line segments and generating a basic signal, the angle between the respective directional vectors of the first and second tangents to the midpoint respectively of the first and second line segments being between 30 DEG and 150 DEG ; an antenna processing device (4, 5) forming combined signals; a signal-processing device (6, 7) generating combined useful signals; a device (8) for calculating the correlation coefficients (Cij between the combined useful signals; and a device (8) for generating a detection signal (Rij when a correlation coefficient exceeds a threshold.

更具体地，本发明涉及一种天线(1)，包括：带有形成第一和第二线段并产生基本信号的传感器(21-2M，31-3N)的第一(2)和第二(3)线性子天线，第一和第二线段各自中点的第一和第二切线的对应方向矢量之间的夹角在30°和150°之间；形成组合信号的天线处理装置(4，5)；产生有用组合信号的信号处理装置(6，7)；计算有用组合信号之间的相关系数(Cij的装置(8)；以及当某相关系数超过阈值时产生检测信号(Rij的装置(8)。

The signal-phase-matching principle of three and multi sensors are proposed in this dissertation. By using these principles, the formulae of estimated spatial signal are derived. The physical meaning and the geometric interpretation of these principles are given. The performances of estimated signal are analyzed when the phase of expected signal and the amplitude of noise are fluctuant.

提出了三元阵及多元阵的信号相位匹配原理，推导了利用信号相位匹配原理的空间信号估计公式，给出了信号相位匹配原理的物理意义及几何解释，分析了信号相位和噪声幅度起伏对信号估计性能的影响。

The system consists of signal acquisition systems, signal processing, show circuit and control circuits, and other components, through the acquisition by Hall sensor voltage signal to the amplifier will signal amplification, and then in the A / D converter after the digital signal into the microcontroller , Through the SCM software programming by the magnetic field signal, the final adoption of LED display to the magnetic field strength.

该系统由信号采集系统、信号处理、显示电路和控制电路等组成，通过霍尔传感器采集得到电压信号，再经放大器将信号放大，然后在A/D转换后将数字信号送入单片机，通过单片机软件编程得到磁场信号，最后通过LED显示出磁场强度。

In this dissertation, digital lock-in detection techniques under integer period sampling and non-integer period sampling are separately investigated (1) Under integer period sampling, digital signal sequence is acquired through sampling the measured signal, but digital reference sequence is acquired through mathematical operation, then digital lock-in detection can be realized by calculating crosscorrelation function of digital signal sequence and digital reference sequence Harmonic measure is also analyzed, and a method of measuring harmonic of a periodic signal under aliasing is put forward.

本文对使用采样ADC把模拟信号转换为数字信号并通过计算数字信号的相关函数来实现锁定检测的技术进行了研究，在此基础上设计了一个多功能的数字LIA并在一些科学实验中进行了应用。本文对整周期采样和非整周期采样时的数字锁定检测技术分别进行了研究。(1)在整周期采样时，对被测信号进行采样得到信号序列，而参考序列由数学运算得到，通过计算信号序列和参考序列的互相关函数就可实现锁定检测。

A real signal can be fitted by a harmonic signal series to calculate the amplitude spectrum and phase spectrum.The relationship between the coefficient,phase angle of the harmonic signal and the amplitude spectrum,phase spectrum of the bispectrum is calculated by Fourier transform.

一个实信号可以用一个谐波信号序列来拟合，计算实信号的双谱，通过Fourier变换推算出谐波信号的系数和相位角与实信号双谱振幅谱和相位谱之间的关系，可以实现信号重构。

The project proposed and established the strict unique mathematical model of instantaneous frequency aiming at the currently existed problems in Hilbert Huang Transform form the viewpoint of physical connotative meaning; proposed and established the strict mathematical model of general intrinsic mode signal based on the concept of general continuous intrinsic mode signal and the compositive principle of practical general intrinsic mode signal; researched and proposed the fitting method of envelope lines in HHT from the viewpoint of theory, conquered the blindness and random in quondam EMD envelope line fitting and boundary treatment; developed a virtual time-frequency analyzer based on general intrinsic mode signal decomposition to open out the local time-frequency characteristics of nonlinear and nonstationary signal more deeply and accurately.

本项目针对希尔伯特-黄变换现阶段存在问题，从物理内涵的角度提出并建立了瞬时频率严格的唯一的数学模型；基于连续性的一般固有模态信号的概念和实际信号的一般固有模态信号的组成原理，提出并建立了一般固有模态信号严格的数学模型；从理论角度研究并提出HHT中的包络线构造方法，克服了原EMD的包络线构造和边界处理的盲目性和随意性；研发一台基于一般固有模态信号分解的虚拟式时频分析仪，使之可以更深入、准确地揭示非线性非平稳信号的时频局部特征。

Domestic entrance, adult college entrance examination, self-examination and the examination of various institutions, some criminal elements to use cell phones to cheat; in the test set MDPB-04-based mobile phone signal isolator, can be effective in blocking the process of examination of the types of mobile phone signal transmission, because cell phone signals within the scope of the test was cut off, any test can not answer the phone, view from outside the examination room phones, text messages; can not make calls, send text messages; guarantee test the order of category 2 intermediate and high school students to use cell phone text messages during school hours in the classroom hair set edsun-2008-type devices to block mobile phone signals, through the mobile phone signal blocking devices to block mobile phone signals, the mobile phone so that students can not receive text messages, send text messages to ensure that students can concentrate on in the classroom full time in a limited guarantee that the quality of teaching.

国内高考、成人高考、自学考试及各类大专院校在考试过程中，一些不法分子利用手机作弊；在考场中设置MDPB-04型手机信号隔离器，可在考试过程中有效阻断各种类型的手机信号的传输，由于手机信号在考场范围之内被隔断，考场内的任何手机都无法接听、查看来自考场以外的电话、短信息；也无法拨打电话、发送短信息；保证考场秩序2类中级、高级中学学生利用手机在上课时间乱发短信在教室中设置edsun-2008型手机信号阻断器，通过手机信号阻断器的阻断手机信号的功能，使学生的手机无法接收短信、发送短信，保证学生能够在课堂上集中精力，充分在有限的时间内保证教学质量。

Domestic entrance, adult college entrance examination, self-examination and the examination of various institutions, some criminal elements to use cell phones to cheat; in the test set MDPB-04-based mobile phone signal isolator, can be effective in blocking the process of examination of the types of mobile phone signal transmission, because cell phone signals wit你好n the scope of the test was cut off, any test can not answer the phone, view from outside the examination room phones, text messages; can not make calls, send text messages; guarantee test the order of category 2 intermediate and 你好gh school students to use cell phone text messages during school hours in the classroom hair set edsun-2010-type devices to block mobile phone signals, through the mobile phone signal blocking devices to block mobile phone signals, the mobile phone so that students can not receive text messages, send text messages to ensure that students can concentrate on in the classroom full time in a limited guarantee that the quality of teac你好ng.

国内高考、成人高考、自学考试及各类大专院校在考试过程当中，一些非法分子利用手机做弊；在科场中设置MDPB-04型手机信号断绝器，可在考试过程当中有用阻断各类类型的手机信号的传道输送，因为手机信号在科场规模以内被隔绝，科场内的不论什么手机都无法接听、查看来自科场以外的电话、短信息；也无法拨打电话、发送短信息；包管科场秩序2类中级、高级中学学生利用手机在上学时间乱发短信在教室中设置edsun-2010型手机信号阻断器，路程经过过程手机信号阻断器的阻断手机信号的功效，使学生的手机无法吸收短信、发送短信，包管学生能够在课堂上集中精力，充分在有限的时间内包管讲授质量。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。