ID 原文 译文
12974 本文总结了谱差法、主成分分析法、平均值标准差法、模拟差法等几种常用的RFI软件识别算法， 以及谱差比值法、SE法等几种较新的识别算法,并对各种算法的适用范围及优缺点进行了评述。 Several common software RFI identifying algorthms for spaceborne mcrowave radometer are systematcally reviewed in this paper, such as spectral difference method, mean and standard deviation method, model dfference method, prnc pal component analysis method, et al. , as well as some new methods, standard error of estimate method, ratio of spectral differences. The main advantages and limitations along with the application scope of each method are also dscussed.
12975 同时详细介绍了源自反射的静止电视或通信卫星下行信号对星载微波观测造成污染的特征及识别、订正方法。 At the same time, the TFI distribution characteristics , as well as detection and correction method to interference fromreflected stationary communication and television satellite downlink signal are introduced in detail.
12976 针对复杂电磁环境下的跳频信号监测问题，提出了一种基于加权阈值的信号提取方法，以解决低信噪比情况下跳频信号不易获取的难题。 For signal monitoring of frequency hopping in complex electromagnetic environment, a signal extracton based on weighted threshold was proposed, which could solve the difficult problem of frequency hoppmg signa! extracion in low signal to noise ratio (SNR) condiion.
12977 采用短时傅里叶变换对接收信号进行时频分析,得到反映信号频率成分随时间变化的时频矩阵,然后采用加权阈值提取每ー时段的信号特征,经聚类筛选后采用统计直方图的方法进行跳频参数估计。 This paper conducts time-frequency analysis for receded signal by short-time Fourier transform, which could obtan the time-frequency matrix ref!ecting variety of frequency over time. Then, signal feature of each segment is extracted by weighted threshold. Frequency hopping parameters could be est4mated by means of hstogram after clusterng and screenng.
12978 存在定频干扰时，筛选过程可以有效去除定频频点。 The screenng process can also have the great capacty to delete constant frequency under strong constant frequency interference.
12979 通过对仿真数据的处理，验证了本文算法的有效性，设计了一种基于电磁超材料的抗干扰天线。 The processng of simulation data verifies the effectiveness of algorithm in this paper. An anti-jamming antenna utilizing electromagnetic metamaterials is presented in this paper.
12980 该抗干扰天线由矩形波导腔体，铺设于波导腔体底部宽边的电磁超材料以及位于波导腔体上部宽边的辐射缝隙构成。 The anti-jamming antenna consists of a rectangular waveguide cavity, electromagnetic metamaterials embedded in the bottom broad wall of the cavity and the radiating slots cut on the top broad wall.
12981 当电磁超材料表现为完美电导体时,该抗干扰天线同传统波导缝隙天线类似，可高效辐射电磁波。 When the metamaterials perform as perfect electrc conductor, the ant-jamming antenna radiates efficiently as a traditional waveguide slot antenna.
12982 当电磁超材料表现为完美磁导体时,该抗干扰天线的性能与带阻滤波器相似，可抑制特定频段的干扰电磁波。 When the metamaterias perform as perfect magnetic conductor, the antijamming antenna reject the propagation of electromagneic wave in specified interference band, just like a band-stop filter does.
12983 该抗干扰天线实现了天线与滤波器的高度集成,结构紧凑。 The antenna structure is highly integrated with the filter structure for ths anti-jammmg antenna, so the presented antenna is compact.