雷达

By this model, the target IF return of sum, difference and SLB/SLC antenna channel of the trilobe of frequency-phase scanning 3-D radar could be represented in one uniform expression accurately.

提出了一种三坐标雷达目标中频回波模型及其模拟方法，通过对和、差及辅助通道的目标三联波束回波统一建模，可以全面逼真地模拟频相扫三坐标雷达的目标回波。

An introduction is given to the ambiguity function of the transmitted waveform, based on which the resolution and the principles for waveform design are analyzed. Combined with bistatic radar, the velation between the resolution and the target positron is discussed.

推导了该雷达发射信号的模糊函数，分析了影响其距离和速度分辨率的因素以及波形参数选取原则，结合双基地雷达的特点，给出了模糊函数与目标位置的关系。

I don't mean airbrushed as in by hand. The radar images are electronically filtered using software.

我是说，雷达的照片不是手工被弄模糊的，而是用软件对雷达的照片进行电子过滤的。

What few people know is that radar reports for the National Weather Service are also airbrushed, so that certain radar images aren't released.

鲜为人知的是，国家气象服务的雷达报告也被弄模糊过，所以特定的那个雷达的照片他们不放出来。

The SAR imaging algorithm of moving spot targets in the background of ground clutter s;2. To perform the simulation of ground clutter received by space-based pulse doppler radar,a method based on the analysis of cohered video is illustrated in this paper.

针对星载脉冲多普勒雷达的地杂波仿真问题，介绍了基于视频信号的模拟方法，并且给出了具体的计算公式、原理和步骤；从理论上分析了星载PD雷达的地杂波谱；最后通过仿真分析了主瓣杂波与天线视角的关系，以及主瓣杂波与地球转动之间的关系。

multi-channel correlators are widely used in traditional pseudo-random code cw radar,which makes the ranging system more complicated.this paper proposes a method of digitalizing the return signal directly and then convoluting the signals on dsp,which can replace multi-channel correlation in analog circuit.but the computation of convolution is too huge for the dsp to fulfill.to solve this problem,this paper analyzes five fast algorithms including fft,and then chooses one according to the characters of prc-cw radars.the digital method and fast algorithm have been verified by simulated signal and real signal.

一种提高空间伪码扩谱测距精度的实用。。。摘要：传统的伪码调相连续波雷达采用多路模拟相关电路实现对回波信号的相关接收，通过多路试探搜索各距离单元的目标，电路复杂。提出的数字化方案，对回波信号直接数字化，利用高速dsp实现数字卷积，可替代多路模拟相关电路。但是直接卷积的运算量过大，dsp无法承受。本文对此进行了研究，分析了包括fft在内的五种快速算法，结合prc-cw雷达的具体情况，确定了一种适于dsp实现的快速卷积算法。仿真和实测数据证实了数字化方案及快速算法的正确性。

multi-channel correlators are widely used in traditional pseudo-random code cw radar,which makes the ranging system more complicated.this paper proposes a method of digitalizing the return signal directly and then convoluting the signals on dsp,which can replace multi-channel correlation in analog circuit.but the computation of convolution is too huge for the dsp to fulfill.to solve this problem,this paper analyzes five fast algorithms including fft,and then chooses one according to the characters of prc-cw radars.the digital method and fast algorithm have been verified by simulated signal and real signal.

摘 要：传统的伪码调相连续波雷达采用多路模拟相关电路实现对回波信号的相关接收，通过多路试探搜索各距离单元的目标，电路复杂。提出的数字化方案，对回波信号直接数字化，利用高速dsp实现数字卷积，可替代多路模拟相关电路。但是直接卷积的运算量过大，dsp无法承受。本文对此进行了研究，分析了包括fft在内的五种快速算法，结合prc-cw雷达的具体情况，确定了一种适于dsp实现的快速卷积算法。仿真和实测数据证实了数字化方案及快速算法的正确性。

Based on decompounding of row vectors and line information, a fast evaluation model of jamming effect is built, and the allocation tactics for radar jamming resources, jamming effect after allocating are studied by using the principle of Euclid close degree.

在分解隶属度矩阵行向量信息与列向量信息的基础上，构建了一种快速评估雷达干扰效果的模型。利用Euclid贴近度原理对雷达干扰资源的分配策略、分配后的干扰效果进行了研究。

In this paper, general scheme of the Digitalized Universal Radar Receiver is analyzed and designed according to the requirement of its performance and function.

论文结合雷达数字通用接收机性能、指标的要求，对雷达数字通用接收机的总体方案进行了分析和设计。

In this paper,we present a rapid and practical radar azimuth calibration method and shaft angle position digitalizing system that has been successfully proven by radar installation test.

给出了一种已经雷达装机试验成功的方位标校方法和轴角变换系统，并被广泛应用于高机动地面情报雷达伺服系统中，取得了良好的效果。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。