At first , we build models of echo signal and several typical noise interferences and then analyze effects on uwb sar by interferences with different power , bandwidth and type . so a good beginning for later work is made 本文首先建立了回波信号和几种典型噪声干扰的模型,分析了不同功率、带宽和类型的噪声干扰对uwbsar的干扰效果,为后续工作奠定了良好的基础。
Since the echo signals are partly received , this radar system has detected the target adopting the processing mode of blocking echo signal before and after , and the problems of the isolation between transmitter and receiver and blind range are solved 该体制雷达采用前后截断回波信号处理方式，当接收部分回波信号后就对目标进行检测，解决了收发隔离和盲距问题。
The radar simulator can be configured with multi parameter of radar and surrounding flexibly , and generate multi kinds of echo signal of radar . it reduce the cost of radar research and testing efficiently 雷达信号模拟器能够较为灵活的配置多种雷达参数和环境参数，模拟多种情况下的雷达回波，同时它能够大大降低雷达在研制和实验阶段的费用，具有很高的经济价值。
This paper is mainly about land clutter and sea clutter . it meanly introduced scatter character , radar echo signal range , and power spectrum model . in the end , a hardware realization of producing a specified power spectrum is given 本文主要研究了地、海杂波的散射特性、回波幅度特性和频谱分布模型，并且给出了一种硬件实现产生具有一定频谱特性的杂波的方案。
That is , modeling radar system with software , and then recurring the produce , transmission processing by computer . the core of res is modeling the scatter and transmission of radar echo signal and varied radar clutter signals 雷达模拟的核心是建立雷达目标回波信号及各种杂波信号散射、传播特性的模型。杂波伴随这雷达产生而产生，对于雷达的设计有着重要的影响。
At the end of this paper a hardware simulator of sar raw signal is introduced . the system of radar equipment , the system of signal disposal and the system of raw echo signal simulation are analysed 最后分析了一种合成孔径雷达地面模拟实验系统。对机载雷达设备模拟实验子系统、地面信号处理模拟实验子系统和合成孔径雷达原始回波模拟实验子系统分别进行了详细的介绍。
A high - speed sampling system for echo signal of impulse gpr based on equivalent time sampling method is presented , and significant circuits including step sampling pulse generator and sampling gate circuit are designed 摘要提出了一种基于等效时间采样方法的冲击型探地雷达回波信号高速采样系统，设计实现了等效时间采样的关键电路，包括步进采样脉冲发生器、采样门电路。
K method fft the echo signal , and transform it to the ? k domain , it is the most effective method to implement the 2 - d sar shifting filter . however , stolt interpolation will increase the imaging time , and will influence the quality of the image 波数域成像算法是sar二维移变滤波器的最有效实现,但是stolt插值运算将带来附加的计算量并且频域插值精度对成像质量有一定影响。
Most present acoustic level gauges use a sound generator which can produce high - power acoustic waves and a microphone which can detect the echo signal . the fluid level can be worked out based on the artificial analysis of the echo curve 目前正在应用的井下液位测量仪器，主要是通过爆炸声源产生大功率声脉冲信号，利用微音器接收回波信号，人为地对回波信号曲线进行分析来估算液位。
The wavelet ' s characteristic of focus " varieties make wavelet better analyses ability in the time field and the frequency field . it is a perfect method of analyzing non - steady signal , and it is fit to analysis ultrasonic pulse echo signal 而小波的“变焦距”特性使得小波分析在时域和频域中都具有良好的分析能力，是一种理想的分析非稳态信号的途径，适于对超声脉冲回波信号的分析。
