Angle information of targets in conical scan stepped-frequency radar is contained the in echo amplitude. 圆锥扫描频率步进雷达的角度信息完全体现在目标回波的幅度信息中。
The Echo Amplitude Normalization for Swath Bathymeter 条带测深仪中回波信号的幅度归一化
A method which makes use of the phase information of spectrum of radar echo amplitude signal to make azimuth super resolution is given. 本文介绍了一种利用雷达回波幅度信号频谱相位信息进行角度超分辨的方法。
The principle analysis shows that the information on the echo phase and amplitude is also very important for the evaluation of explosive welded structures of different materials in acoustic impedance, and the broadband ultrasonic technique must be used for them. 从原理分析说明了超声检验异种材料爆炸复合时,回波脉冲的相位和幅值信息是同样重要的,须采用宽频超声技术。
Echo highlight structure model and echo highlight signal model are studied in this paper, especially the computing methods of echo highlight signal's amplitude, time delay, Doppler shift, and phase. 该文研究了水下目标亮点的结构模型及亮点回波信号模型,重点分析了窄带系统中目标亮点回波信号的幅度、时延、频移以及相位的仿真计算方法。
Abstract For multi beam swath echo sounder system, an optimum digital Hilbert transforming method to obtain quadrature signals with rigid amplitude and phase balances is provided in this paper. 本文针对多波束条带测深系统,提出了一种优化的数字希尔伯特(Hilbert)变换方法,来获取幅度和相位严格平衡的正交信号。
The specialities of echo waves for various explosive welding seams are discussed, the formulae for calculation of the echo phase and amplitude are derived and the theoretical waveforms of the echoes are given. 介绍了各种爆炸焊缝超声检验回波特点,推导了计算回波信号幅度和相位的公式,给出了理论波形图。
The ultrasonic echo is modeled as the Gaussian echo that is corrupted with white Gaussian noise ( WGN), and the nonlinear model on a series of estimated parameter as bandwidth, arrival time, center frequency, phase and echo amplitude is established. 本文将超声回波模拟成被高斯白噪声污染的高斯回波,并建立关于一系列估计参数的非线性模型,如回波的频带宽度,到达时间,中心频率,相位及回波幅度。
Based on the sea echo Doppler power spectra of every channel, channel amplitude responses are software calibrated for every range cell. 在各通道独立接收的海洋回波谱分析的基础上,针对每一距离元进行通道幅度的软件校准。
To improve the system gain and eliminate the dead zone in ultrasonic imaging testing, the method of ultrasonic imaging testing with bottom echo amplitude was studied. 针对超声缺陷波成像检测的盲区问题,研究了利用超声底部回波信号进行成像的方法。
The Doppler frequency estimation of radar narrow band echo signal based on cyclic cross-correlation amplitude is discussed. 针对雷达窄带回波信号的循环互相关估计多普勒频移问题进行了研究。
The simulation shows that a more accuracy discrimination result can be acquired compared with the traditional echo amplitude threshold method. 仿真结果显示,与传统的回波幅度阈值方法相比,新方法能够获得更为准确的判别结果。
As the envelope of amplitude information of the echo signals can be obtained by the amplitude of down-conversion I/ Q signals through some algorithms, so on the amplitude detection, two traditional methods of the video detection are used-Moving window detector 、 Two-Pole filter. 由于可以从下变频后的I/Q两路信号的幅值信息经过计算得到回波的幅值包络信息,所以在回波幅度检测方面采用的是传统的视频检测的方法&滑窗检测和双极点滤波器。
The monopulse angle measurement is often used to measure angle in the radar. It receives object echo signal by multiple antennas at the same time, and gets object angle information through comparing object echo signals 'amplitude and phase. 单脉冲测角是雷达中常用的一种测角方法,它利用多个天线同时接收回波信号,通过比较回波信号的幅度或相位来获得目标的角位置信息。
The echo data is processed using array high resolution technology to realize the target recognition and estimation of amplitude. 该方法采用阵列高分辨技术对回波数据进行成像处理,可以实现目标的识别和强度值的估计。
Point target echo is studied. First, build the target models in ADS, which contains target information, including signal delay, amplitude attenuation, phase variation and Doppler shift. Let the radar transmit signals pass the target model, then the echo signals are simulated. 本文讨论点目标的回波信号,先在ADS软件中建立目标模型,该模型能够实现雷达发射信号延迟、幅度衰减、相位变化以及多普勒频移,最终模拟出目标回波信号。
In the experiment, based on temperature and humidity models of atmospheric turbulence, we build an indoor experimental device to simulate atmospheric turbulence field to study the influence of atmospheric turbulence on the property of laser ranging echo signal amplitude fluctuation and the dispersion of ranging data. 在实验上,基于大气湍流的温湿度模型,搭建室内模拟大气湍流场的实验装置,研究了大气湍流对激光测距回波信号幅度起伏特性和测距数据离散性的影响。
Ultrasonic distance measurement has the advantages of simple, low cost, but due to air attenuation, echo signal amplitude fluctuation is large, which can cause larger error. 超声波测距设备简单,造价较低,但是在空气中衰减快,回波信号幅度起伏较大,会有较大误差。
It realizes off-line analysis and image reconstruction through saving of ultrasonic data, and replays the A scan waveform and echo amplitude of each detection position. 对超声数据进行编码存储,实现了超声数据的离线分析和图像重构,并可回放各检测点处A扫描波形和回波幅值。
Based on ultrasonic echo method, the relation between ultrasonic attenuation coefficient and the amplitude of surface as well as bottom echo wave was studied, and portable ultrasonic inspecting system for void content of CFRP was constructed. 以超声反射法为基础,研究了超声衰减系数与材料表面和底面回波幅值之间的数学关系,构建了碳纤维复合材料孔隙率检测便携式超声系统。