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This dissertation discusses mainly the analysis of ground clutter spectrum in sum and difference channels for airborne phased array radars(APAR), and the design of the radar signal simulation resource and the video output of the APAR simulator. 本文以机载相控阵雷达视频信号模拟器的研制为背景，以实现和差通道的目标和杂波模拟为重点，对该系统的雷达时序产生和系统的视频输出等问题的设计和实现进行了较深入的研究。
Modeling and Analysis of the Ground Clutter Spectrum on Bistatic Airborne Early Warning Radar 双基地机载预警雷达杂波建模与分析
ground clutter spectrum 杂波谱
Abstract: Airborne radar moving target detection （MTD） systems must accurately estimate clutter spectrum centroid to suppress the clutter. 文章摘要: 在机载雷达动目标检测（MTD）处理中，为了有效抑制杂波，必须先对杂波谱中心进行准确估计。
The method utilizes an AR model to approach the frequency response of the clutter spectrum "inverted" ideal band-pass filter, and then implements the design of optimal FIR filter. 该方法利用AR模型逼近杂波谱“倒置”理想带通滤波器的频率响应，实现了最优FIR滤波器的设计。
It is the key to suppress ground clutter for airborne early warning (AEW) radars. 抑制杂波一直为机载预警(AEW)雷达信号处理的关键技术。
The TSB-CFAR detector is proved to be effective segmentation by IPIX sea clutter and MSTAR SAR ground clutter detection experiments. IPIX海杂波和MSTAR合成孔径雷达地杂波数据检测实验也证实了本文方法的有效性。
Due to the impact by ground clutter,it is difficult to detect ground moving target,especially ground slow moving target. 由于受到地面大量杂波的影响,使得地面运动目标不易于检测,尤其是地面慢速运动目标。
By sea clutter and ground clutter modeling,electron jammer modeling atmosphere attenuation modeling,the cruise missile flight con. 通过建立杂波模型、电子干扰模型以及大气衰减模型,分析了巡航弹飞行环境对雷达探测性能的影响。
Based on the pattern characteristies of planar phased arrays,this paper studies the properties of temporal-spatial 2-D clutter spectrum of AEW radar with the phased arrays,with the emphasis on sidemounted phased arrays. 本文在分析矩形平面相控阵天线方向图特点的基础上,研究了相控阵机载预警雷达的时空二维杂波谱特性。
The one-order canceller method is utilized to filter out the ground clutter in the signal stretching process, and then a clear spectrogram of targets is obtained. 再对语图进行处理，分离目标主体信息和微多普勒信息，实现目标主体的清晰成像；
As most of non-coherent radar on active duty has no or little clutter cancellation ability,whenever flying targets enter the area of ground clutter,it is very difficult for radar to observe targets. 由于大多数非相参体制雷达没有杂波对消能力或杂波对消能力较差,一旦各类飞行目标进入地杂波区,雷达就难于观测目标。
As moat of non-coherent ruder cc active duty harm a little clutter cancellation ability, whenever flying targets enter the area of ground clutter, it is very difficult for radar to thieve targets. 摘要由于大多数非相参体制雷达没有杂波对消能力或杂波对消能力较差，一旦各类飞行目标进入地杂波区，雷达就难于观测目标。
This paper analyses the airborne radar ground clutter suppression abilitv of DPCA by decomposing the clutter zone into small celis, and points out that DPCA is a shnple tinic-space processor. 该文采用杂波单元分解的方法分析了相位中心偏置天线(DPCA)对机载雷达主杂波的抑制性能,指出DPCA是一种简单的时-空二维滤波器,并分析了当主杂波中心频率不为零时DPCA杂波抑制能力下降的原因。
Based on the inherent constrains of co-altitude satellite constellations, the relationship between the ground clutter Doppler spreading and satellites flight geometries is discussed. 基于星座固有的空间约束条件，讨论了由于平台运动引起的地杂波多普勒频率扩展与卫星飞行的几何关系。
None of the proposed methods will be effective enough to remove ground clutters. 提出来的方法都不足以排除地面杂波。
Removing Ground Clutter Using Lifting Wavelet 提升小波去地杂波方法
We analyse statistics properties of ground clutters and study AR model of correlated clutters power spectral density. 分析了地杂波统计特性，研究了相关雷达杂波功率谱特性的AR模型及其模拟方法。
The fox went to ground under a rocky escarpment. 狐狸钻进了石崖下面的洞里。
The ground was covered with ferns. 地面上长满了羊齿植物。