目标信号

• The pixel size of p + / n - well / p - sub structure is 100 umx 100 n m , fill factor is 77 . 6 % . it can obtain target information with illuminance intensity in the range of 0 . 011x ~ 98 , 0001x , and the sensor photoelectric sensitivity is 35v / lx ? s . when the method of changeable reset frequency double scanning is used , the photoelectric dynamic range can be 139 . 8db , which is high in the 0 . 6 um level cmos image sensors already reported
  在对感光单元进行器件物理结构优化的研究中，通过采用深结深光电管结构，提高了传感器的感光响应，其中p m阶”衬底结构的传感器面积为100umx100urn ，感光面积百分比为77石，可对0刀98 ， 000lx照度的目标信号进行传感，感光灵敏度大于3sv ix ? s ，采用了变频两次扫描后，动态范围可达139
• The main function of the module is as follows : it can detect the cw signal transmitted by the active sonar , and measure the frequency of target signal and the direction of target . it can execute the tracking order sent by the display and control platform , and track the searched target , measure the target signal repetition intervals and target distance , and give the reliability of estimated distance
  该软件的主要功能包括：对主动声呐cw脉冲信号进行检测，测量目标信号的中心频率，测定目标的方位；执行显控台跟踪命令，对搜索到的目标进行跟踪，测量目标信号的重复周期，测定目标的距离，给出距离测量值的置信度。
• Based on the characters of signal processing in doppler guidance radar and the background of actual engineering application , conditions including the complex observation signal , the conjugate cyclic moment and the narrowband gauss color noise are adopted to characterize the observation signal model . signal detection and parameter estimation of radar maneuvering target under the co - jamming of additive and multiply noise are researched profoundly
  论文紧密结合多卜勒制导雷达信号的处理的特点以及实际工程应用背景的要求，采用了复观测信号、共轭循环矩、窄带高斯色噪声等主要约束条件作为信号处理的模型特征，详细研究了加性和乘性噪声联合干扰下的雷达运动目标信号的检测和参数估计问题。
• 3 . a novel modular learning strategy is present based on the cross - component in the wvd and neural network for the detection of a target signal of interest in a nonstationary oceanic environmemt and this strategy makes no assumptions on the environmemt . simulations show that this new method has much superiority over matched filter
  首次利用wigner - ville分布中的交叉项并结合人工神经网络，提出了一种新的基于模块学习策略的信号检测方法，该方法对淹没在非平稳海洋环境噪声中的目标信号可进行有效地检测，并且这种学习策略没有对环境噪声作任何假设。
• Give some simulations about the doa ( direction - of - arrival ) estimation based on system of correlation equations . while the improved genetic algorithms was used . comparison of the accuracy of estimation for different objective function and different values of snr are given with narrowband signal
  该方法运用改进后的遗传算法对声压和质点振速之间的相关方程进行求解，当目标信号为窄带时，对不同代价函数下遗传算法对信号的方位和强度估计进行了比较，并对信噪比、方位角变化时该方法的估计结果进行了仿真研究。
• The specific research methods are listed : 1 . matched filter taking the max ouput snr as the best rule correlates nonstop divided signal and divided echo to detect low snr target signal . then all one dimension divided correlation outs and done fft in portrait to leach interferential signal such as static or low rate mussy meaves , many pathway echo and so on and to take target ' s time difference and doppler frequency that combine parameters that target ' s direction taken from antenna and so on to implement target ' s orientation and tracking
  具体研究方法如下： 1 、采用以输出信噪比最大为准则的最佳匹配滤波器来对分段的参考和目标信号作相关处理来检测低信噪比目标信号，然后对一维分段相关输出组作纵向傅立叶变换来滤除静态或低速的杂波、多径回波等干扰信号，并提取目标的时差和多普勒频率，再结合由天线获得的目标方向等参数，就可以实现目标的定位和跟踪。
• In this article , on the basis of analyzing the millimeter - wave technology and its applications , the signal of objects and mathematical simulation of passive - method millimeter - wave are discussed , and the half - real simulation model are build , then the equivalent relationship of inner simulation and field experimentation is researched . at last , the practical way of criterions of measuring the passive - method millimeter - wave detection system is given on the basis of this method
  论文在分析毫米波探测技术及其应用的基础上，讨论了毫米波被动式探测体制的目标信号及数学仿真问题，建立了相应的半实物仿真系统，并研究了室内仿真与野外试验的等效关系，最后给出了用该方法进行毫米波被动式探测体制系统指标测试的具体方法。
• To detect target signal with strong sea clutter , to increase the clutter visibility of sea radar and enable higher resolution and reliable monitoring performance of sea radar , three kinds of key clutter modeling technology for sea radar are studied in detail , which are clutter scattering mechanism modeling , clutter statistics modeling and clutter nonlinear modeling on basis of elaborating sea clutter characteristics
  摘要为了能在强烈的海杂波背景下检测到目标信号，从而提高海面雷达的杂波可见度，使海面雷达具有更高的分辨率和可靠的监测性能，在精确的描述海杂波特性的基础上，详细研究了杂波散射机理建模、杂波统计建模和杂波非线性建模3种海面雷达杂波建模关键技术。
• This dissertation mainly researches the displaced phase center antenna ( dpca ) technique in the new system , and the contributions are calculated as following : 1 . the doppler history is analyzed for the spaceborne bistatic sar , doppler center frequency and doppler fm rate computational methods are studied . summing up is done for the methods of moving target detection and imaging
  本文完成的主要工作有: 1 .分析慢速运动目标信号特征以及运动目标对sar成像的影响(多普勒中心频率,多普勒斜率以及距离徙动误差) ,总结了目前sar运动目标检测与成像的主要方法。