ID 原文 译文
13164 机载雷达主要在海杂波背景下探测舰船目标，探测性能受海杂波影响大， Airborne radar detects ship target mainly in sea clutter, and the detection performance is greatly bounded by sea clutter distribution property.
13165 本文对L波段机载雷达回波特性、海杂波分布特性进行了理论分析建模，从目标检测的角度提出了海杂波预处理流程，并采用拟合的方法，基于实测数据对RayleKh分布"Lognormal分布、复合K分布、Weibull分布等四种典型的杂波分布进行了验证，所用5级高海情和3级低海情数据样本分析表明，四种分布中Lognormal分布显著占优。 This paper analyzes properties of L-band airborne radar echoes and especialy those of sea clutter, and then presents pre-processing scheme oH sea c*utter Hrom the vi ew of sh i p detection. classical distribution models namely Raybsigh, We bull, Lognormal and compound K distribution, are verified with real radar data, which shows that the Lognormal distribution is the best. Therefore, the above preprocessng method and concluson are meanngful in designng radar detector in practice.
13166 上述方法与结论可用于辅助雷达最优检测器设计，具备较高的工程应用价值，非相干散射雷达使用复杂的信号处理技术来获得多种高精度的电离层参数，自相关函数计算是其中的关键。 Incoherent scattermg radar use complicated data process, among which the calculation of auto correlation function (ACF) is very important, to achieve many high precision ionospher parameters.
13167 文章详细推导了非相干散射雷达的模糊函数与自相关函数表达式，并针对常用的13位巴克码和16位交错码(alternating code, AC)的整数阶和分数阶进行了仿真与分析。 We deduce the formula that includes ACF with ambiguity function, and emulate 13 bits barker code, integer and fraction of 16 bits alternating code (AC). We achieve two results.
13168 研究发现：1)巴克码不适合计算非零时延处的自相关函数。 The first is for barker code: barker code only use lag0 to calculate ACF.
13169 2)AC码分数阶比整数阶有更多的时延点数,自相关函数计算更准确，同时，功率谱谱宽增加。 The second is for AC code: fraction way has more delay points than integer way, so fraction way calculates ACF more precise with wide power spectrum.
13170 以上结果对提升我国电离层非相干散射探测与研究水平具有重要意义。 This is important for improving ionosphereic detection and studying ionosphere.
13171 研究了侧馈偏置卡塞格伦(sidbfeed offset Cassegrain, SFOC)天线，针对SFOC天线的几何结构，讨论了结构参数的改变对天线辐射特性的影响，通过调整天线的设计参数实现天线波束的最佳扫描。 A sidvfeed offset Cassegrain (SFOC) antenna is studied. The influence of structural parameters on the radiation pattern of the antenna is dscussed. The opt imal beam scanning of the antenna is achieved by adjusting the antenna design parameters.
13172 对天线在不同扫描角度时的辐射方向图进行计算，分析了方向图的副瓣变化及天线波束扫描时天线增益的变化。 The radiation pattern of the antenna at different scanning angles is calculated. The changes of the s idelobe level and antenna gain during beam scanning are analyzed.
13173 仿真结果表明除了馈源被反射面遮挡的情况外，该SFOC天线在扫描过程中增益损失以及副瓣变化 均较小，为星载天线的设计提供了参考。 The simulation result shows that except for the case where the feed is blocked by the reflector, the gain loss and the sidelobe level variation of the SFOC antenna are small，which provides a reference for the desFgn of the satellte antenna.