杂波

The Airy function is used to calculate the plasma impedance and the grill-plasma scattering matrix is deduced, then the coupling properties of the HT-7 LHCD MJ launcher are studied with the antenna scattering matrix and the grill-plasma scattering matrix based on the liner coupling theory. The average power reflection coefficient, directivity, power spectrum are obtained for different edge plasma densities and for different phasings between main waveguides.

采用线型耦合理论，用艾黎函数计算了等离子体阻抗，推导出常规波导阵对等离子体的散射矩阵，并利用它和天线自身的散射矩阵研究了HT-7装置低杂波多结波导阵天线的耦合特性；计算了其平均功率反射系数、方向性系数和功率谱与等离子体边缘密度和主波导相位差等参数的关系。

We establish a new observation model of α-stable distribution for low altitude detection. It is very concernment that fractional lower-order statistics based detection and estimation robust approach for radar target signals, so as to perform optimal detection under constant probability of false alarm.

在不同的海况下，由于雷达波在波峰和波谷间的反射以及在波浪边缘的绕射等复杂电磁现象，使得雷达波不仅频谱形状不规则，而且反射单元的概率分布也超出常规，所以必须高度重视海杂波的特性研究，从中找出有价值的参数。

Since the strong ground clutter processing residual on the low beam position caused by the sequential scanning of the beam in radar elevation is used as ground clutter and it appears in high beam position skippingly,this will affect radar normal dete.

由于这种雷达俯仰面波束的时序扫描而产生低波位的强地物回波处理剩余，作为地物杂波在高波位时跨周期出现，影响雷达系统正常的检测与显示，为解决此问题文中提出了一种比较有效的处理方法。

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。

This method is used in a sea surveillance radar. Three months'experiment shows that the tracking is robust and reliable under different kinds of weather, and resistance to clutters of sea and rain.

该方法用在某型对海雷达上，三个月的试验表明，系统在各种海况和气象环境下能稳定跟踪所有检测到的目标，有效减小了雨杂波、海杂波的影响，具有较好的鲁棒性。

Thirdly, we study the clutters of the Pulsed Doppler radar and the clutters elimination algorithms.

再次，本文研究了脉冲多普勒雷达杂波以及杂波抑制算法。

The algorithm applies wavelet transform to SAR image and enhances ship signal and homogenizes background clutter of SAR images in wavelet domain using multiscale products.

本算法对SAR图像进行小波变换，应用多尺度积在小波域增强SAR图像船舰信号和均匀背景杂波，再对SAR图像进行目标检测。

In condition of strong nonstationary clutter, CFAR processing can restrain sharp increase of PFA. It also can avoid screen saturation and the successive data processing overburdening.

在非平稳杂波中， CFAR 处理可以有效地抑制杂波强度增加引起的虚警概率的急剧上升，进而避免显示器画面饱和或后续数据处理设备过载。

this paper introduces a clutter tracking technique which is to track clutter accurately and uprate the performance of cfar for pd radar, the algorithm is based on analyzing the texture of clutter.

为了精确跟踪杂波，提高pd雷达的恒虚警检测性能，该文提出一种基于多重分形定义的雷达杂波跟踪技术。

This thesis discussed the wave forms of the pseudo-random-code phase-coded quasi-continuous wave radar. Then studied the working process of its receiving system and analyzed its noise and clutter environment. This thesis constructed the simulation flow chart .

论文首先对伪码调相中断连续波雷达的信号波形进行分析，接著研究伪码调相中断连续波雷达数字化接收系统的工作过程及噪声与杂波环境，构建了接收系统的仿真模型。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。