ID 原文 译文
14455 该技术可以支持陆态、海态、陆海态等多种不同体制平台任务的任意加载,为实现地面站与地面站、地面站与舰面站、舰面站与舰面站之间的多站一机管控切换提供了有力支撑,有效增强了无人机系统跨域作战的能力。 It can support the arbitrary loading of various system platform tasks,such as land state, sea state,land and sea state. It provides strong support for the realization of multi-station-and-one-machine control switching between ground station and ground station, ground station and ship surface station, ship surface station and ship surface station, and effectively enhances the cross domain combat capability of UAV system.
14456 同时,系统能够满足无人机多类型、多型号不断扩展的需求,减少无人机测控装备种类,降低新型无人机系统装备建设成本,提升了无人机系统的生存性、灵活性和作战效能。 At the same time, the system can meet the needs of multiple types and models of UAV, reduce the types of UAV TT&C equipment,reduce the construction cost of new UAV system equipment, and improve the survivability, flexibility and combat effectiveness of UAV system.
14457 在穿墙雷达实际应用中,墙体一般由两层不同介质构成,且各层墙体参数未知。 In the practical application of through-the-wall radar,the wall generally consists of two layers of different media and the parameters of the wall are unknown.
14458 若对墙后目标直接成像,会产生目标散焦或位置偏移。 The problem of image defocusing and displacement of the target behind multi-layered wall will arise when the target is directly imaged.
14459 针对该问题,提出了基于折射波静校正的合成延迟时方法对墙后目标进行聚焦成像。 To solve this problem, a composite delay time method based on refraction static correction is proposed to focus the image of the target behind the wall.
14460 首先读取每根接收天线回波数据确定电磁波的折射回波时刻,通过基本折射方程得到延迟时超定方程组,解此超定方程组可得电磁波在外层墙体内的传播时延,再运用相邻发射天线和相邻接收天线延迟时之差估计内层墙体中电磁波的传播时延,最后各个通道内传播时延依次相加后运用后向投影算法获得目标精确成像。 Firstly, the method reads the echo data of each receiving antenna to determine the refraction echo time of the electromagnetic wave,and then obtains the time delay overdetermined equations through the basic refraction equation. Solving the overdetermined equations can obtain the propagation delay of the electromagnetic wave in the outer wall. The propagation delay of the electromagnetic wave in the inner wall is estimated by the difference between the adjacent transmitting antenna and the adjacent re- ceiving antenna. The propagation delay in each channel is added successively and then the backward projection algorithm is used for imaging.
14461 对成像位置精度、图像熵,以及输入输出目标杂波比等性能的分析和比较证明了该算法的有效性。 Finally ,the imaging position accuracy, image entropy and target clutter ratio of the algorithm are analyzed to demonstrate the effectiveness of the proposed algorithm.
14462 为了解决载波相位恢复算法频偏估计范围小、估计精度低、计算复杂度高等问题,提出了一种基于Q次方的极性环与极性判决(Polar Decision, PD)算法相结合的Q次方极性判决(Q-th Power Polarity Decision, QPD)算法。 In order to solve the problems such as small frequency offset estimation range，low estimation accuracy，and high computational complexity of the carrier phase recovery algorithm，a Q－th power polarity decision( QPD) algorithm based on the combination of polar decision( PD) algorithm and polar ring based on Q－th power is proposed．
14463 首先对判决导向(Decision Directed, DD)算法、PD算法、基于Q次方的极性环进行性能分析。 Firstly，the performance of decision directed( DD) algorithm，PD algorithm and polar ring based onQ－th power is analyzed．
14464 然后结合基于Q次方的极性环和PD算法的优点,提出性能更好的QPD算法,并分别在不同频偏和不同信噪比条件下对这四种载波相位恢复算法进行性能仿真与性能比较。 Then，by combining the advantages of polar ring based onQ－th power and PD algorithm，the QPD algorithm with better performance is proposed． In addition，the performance of these four carrier phase recovery algorithms is simulated and compared under different frequency offsets and different signal－to－noise ratio( SNＲ) conditions．