ID 原文 译文
17655 北斗三号卫星不同于北斗二号卫星，将继续播发北斗二号老信号，同时新增播发B1C, B2a等新信号，多频多信号多分量的信号体制较北斗二号更为复杂，对导航卫星信号质量控制提出了较大挑战。 Unlike BDS-2, the BDS-3 satellites not only broadcast old signals, but also broadcast newsignals such as B1C and B2a at the same time. The signal structure of BDS-3 with multi-frequency, multi-signal and multi-component is more complex than BDS-2, which is a great challenge to signal quality control ofBDS-3 satellites.
17656 2018年底北斗系统完成了18颗卫星组网，完成北斗三号基本系统建设并开始提供全球服务，有必要对北斗三号在轨卫星空间信号质量进行量化评估。 By the end of 2018, 18 BDS-3 satellites were successfully launched and the BDS-3 preliminarysystem is completed to provide global services.
17657 传统空间信号质量评估方法侧重于单项的定性评估，而针对北斗三号复杂的信号体制，缺乏系统的、定量的分析结果。 It is necessary to evaluate the signal quality of BDS-3.Traditional signal quality assessment methods focus on the qualitative assessment of a single item, but lackssystematic and quantitative analysis results for the complex signal structure of BDS-3.
17658 该文对标北斗系统接口控制文件(ICD)，从功率特性、频域特性、时域特性、相关域特性和信号一致性等方面研究了不同参数配置对评估结果的影响，形成了一套面向新型调制方式和多频多分量复用信号的量化评估方法。 Based on the InterfaceControl Document (ICD) of BDS, this paper studies the influence of different parameter configurations on theevaluation results from the aspects of power characteristics, frequency characteristics, time characteristics,correlation characteristics and signal consistency, and forms a set of quantitative evaluation methods for newmodulations and multi-frequency, multi-component signals.
17659 基于40 m大口径天线的空间信号质量评估系统，对18颗MEO卫星进行了长时间监测跟踪和数据采集，首次对北斗三号卫星空间信号质量进行了全面量化评估。 Based on the signal quality assessment system with40-meter aperture antenna, 18 MEO satellites of BDS-3 preliminary system were monitored, and the signalquality of BDS-3 satellites were comprehensively and quantitatively evaluated for the first time.
17660 结果表明：北斗三号卫星空间信号质量良好，18颗MEO卫星一致性较好，符合ICD指标要求，可满足服务区内用户需求； The results show that, signal qualities of BDS-3 satellites are good, and the 18 MEOs have a good consistency, which canmeet the requirements of ICD and GNSS users.
17661 评估方法可用于对后续导航卫星空间信号质量的量化评估。 The evaluation methods can be also used to quantitatively evaluate the signal quality of other satellites.
17662 针对背景运动引起动目标检测精度显著下降的问题，该文提出一种基于低秩及稀疏分解的动目标检测方法。 Focusing on the issue that the detection accuracy of moving object is significantly reduced bybackground motion, a low-rank and sparse decomposition based moving object detection method is developed.
17663 所提方法首先引入伽马范数()近乎无偏地逼近秩函数以解决核范数过度惩罚较大奇异值从而导致所得最小化问题无法获得最优解进而降低检测性能的问题， Firstly, in order to solve the problem that the nuclear norm over-penalizing large singular values lead to the optimal solution of the obtained minimization problem can not be obtained and then the detection performance is decreased, the gamma norm () is introduced to acquire almost unbiased approximation of rank function.
17664 而后利用范数抽取稀疏前景目标以增强对噪声的稳健性，同时基于虚警像素所具有稀疏且空间不连续特性提出空间连续性约束以抑制动态背景像素，进而构建目标检测模型。 In what follows, the  norm is used to extract the sparse foreground object to enhance the robustness to noise, and the spatial continuity constraint is proposed to suppress dynamic background pixelssuch that the moving object detection model can be constructed on the basis of the sparse and spatially discontinuous nature of the false alarm pixels.