ID 原文 译文
22055 但目前该系统的物理层安全研究仍采用传统的人工噪声方案，忽略了多用户信号干扰带来的安全增益，造成严重的功率浪费。 However, the physical layer security research of the system still adopts the traditional artificial noise scheme to improve the system security, ignoring the safety gain caused by the multi-user signal interference, resulting in serious power waste.
22056 针对这一问题，该文分析了多用户信号干扰对系统可达平均安全速率和平均安全能效的影响，给出了系统的最佳接入用户区间。 In response to this problem, the impact of multi-user signal interference on the system achievable average security rate and average safety energy efficiency is analyzed in this paper, and the optimal interval of access users is given.
22057 研究发现，在系统接入用户数较少和用户数较多时，系统安全能力较弱，针对此分别提出了 N 波束加扰和基于用户位置的用户调度的自适应安全传输策略。 The research shows that the system security capability is weak when the number of access users is small or large. Therefore, an adaptive secure transmission strategy to transmit N scrambling beams and user scheduling based on user location is proposed respectively.
22058 最后通过仿真验证了理论推导和所提策略的有效性，利用该文所提策略，能够保证系统天然安全能力不足时的安全通信。 Finally, the effectiveness of the theoretical derivation and the proposed strategy is verified through the simulation. By using the proposed strategy, the secure communication can be guaranteed when the system's natural security capability is insufficient.
22059 由于其特有的广域宽覆盖等特点，数据广播业务一直是空间网络的主要业务。 Since its wide coverage area, data broadcast is the major service of spatial system.
22060 然而空地间信道由于受到远距离、天气变化及遮挡等因素影响，数据传输时延长且丢包率较高。 However, due to the long distance and the complex, varied climate, data transmission suffers large round-trip-time and poor error performance.
22061 为进一步提高数据广播的性能，该文将反馈信息与 LT 码相结合，提出一种新的空间网络数据广播传输策略。 In order to achieve better performance, based on fountain codes and the feedback information, a novel and efficient data transmission strategy is proposed.
22062 与传统的数据广播策略相比较，新的传输策略利用反馈信息估计信道丢包率，并在此基础上引入信道状态矩阵和数据包选择权重向量，设计了数字喷泉新的编码方法，进而使得数据在重传阶段能够根据信道状态和重传概率实时调整。 Compared with typical protocols, the proposed strategy uses the feedback information to estimate the channel erasure probability. Besides, a weighted packet chosen vector is introduced into the fountain encoder to ensure the lost packets retransmitted in the order of the total consideration of their lost probability and the number of users which need a retransmission.
22063 仿真结果表明，新的数据广播策略能够实现传输较少数据包的基础上实现原始数据的可靠接收。 Simulation results show that by the proposed scheme users can receive the data packets reliably while the total number of transmitted packets is less than the traditional protocols.
22064 移相器是控制相控阵天线空间波束捷变的“方向盘”，其性能的优良决定着相控阵天线性能的高低。 Phase shifter is the "steering wheel" to control the beam direction of Phased Array Antenna (PAA), which determines the performance of the PAA.