ID 原文 译文
13374 测试结果表明该天线罩的传输曲线与滤波器理论设计结果基本一致,且对天线辐射方向图的影响较小,为多层FSS的精确设计提供了一种精确理论设计方法。 The measured results show that the transmission characteristics agree very well with theoretical value calculated by filter theory. Moreover, the radome has less influence on the radiation pattern of antenna. It offers an accurate theoretical design method for synthesizing the multilayer FSS.
13375 无线通信是开放的自由空间,窃听用户可能在通信过程中对信息进行窃取。 Information may be eavesdropped by eavesdropping users in the process of wireless communication which relies on open free space.
13376 针对多用户下行链路的信息泄露问题,提出一种基于时间反演(time reversal, TR)且采用波束赋形(beam forming, BF)技术优化的安全传输方案。 To solve the information disclosure problem of multi-user downlink, a secure transmission scheme which is optimized by beam forming(BF) technology on the basis of time reversal(TR) technology is proposed in this paper.
13377 该方案以最大化安全容量为多用户通信准则,建立多输入单输出(multiple-input single-output， MISO)窃听信道模型。 This scheme takes the maximization of security capacity as the principle of multiuser communication, builds a multiple input single output(MISO) wiretap channel model.
13378 一方面基站采用BF技术使信号在指定方向上增强,针对期望用户发送需求信号。 On one hand, the base station uses beam forming technology to make the signals enhanced in the specified direction, and transmit the demand signals to the desired users.
13379 另一方面由于TR技术对环境是自适应的,基站的信号在发射之前都要经过TR腔,其空时聚焦性使能量聚焦在合法接收方,保密性能更优。 On the other hand, the signals of the base station need to pass through the time reversal cavities before being transmitted because of the environment adaptive technique-time reversal, and spatial and temporal focusing characteristics of time reversal technology make the energy focused on the legal receiver to make the performance of security better.
13380 理论分析和仿真结果表明：与已有物理层安全方案相比,所提方案安全容量更高,误比特率更低。 The theoretical analysis and simulation results show that the proposed scheme has a higher security capacity and a lower bit error probability.
13381 针对明安图射电频谱日像仪(Mingantu spectral radioheliograph, MUSER)天线高指向精度动态跟踪要求,同时为降低非理想因素对复杂系统天线指向测量影响,提出校准天线指向的组合方法。 To get good antenna tracking pointing accuracy under imperfect measurement link status of complicated system, methods and measurements of cubic radiation patterns and cross scanning-and-tracking are proposed for the two 20 m Az-El antennas.
13382 用最小二乘法拟合获得天线指向模型的8个参数。 Least square method is also used to obtain the 8 parameters of the 20 m antenna pointing model.
13383 对20 m天线跟踪指向进行了校准,指向偏差均方根从12'改善到4.4',验证了方法的可行性,为类似复杂系统的相关工作提供了借鉴和参考。 After calibration, the pointing accuracy is improved from about 12'(rms) to about 4.4'(rms), testifying the reliability of the proposed methods and providing a good reference for other complicated telescope systems.