ID 原文 译文
21755 并对距离扩展目标进行了理论分析，推导出其获得近似的补偿相参增益所需要满足的条件。 Then, requirement for the range extended target is analyzed in theory, in the condition of approximate compensative coherent processing.
21756 并通过仿真验证了理论分析结果。 Finally, the theoretical analysis results are verified by simulation.
21757 针对传统米波雷达低仰角下波瓣分裂和盲区问题，该文提出一种频率分集子孔径MIMO雷达，构建了该体制下多径特性定量分析的理论框架，推导了镜面反射和扰动多径模型及其联合发射-接收方向图增益闭合表达式； Traditional meter-wave radar usually suffers from the problem of Beam Split (BS) and Radar Blind Area (RBA) in the situation of low-grazing angle. To alleviate this difficulty, a Frequency Diverse Subaperturing Multiple-Input Multiple-Output (FDS-MIMO) radar is proposed and a theoretical framework for the analytical investigation of multipath characteristics is presented. The specular and perturbational multipath model is built, along with closed-form expression of the joint transmit-receive beam pattern gain.
21758 提出了多径抑制区概念及其边界条件，定义了描述低空波束覆盖性能的低可观测率定量评价指标；根据边界条件的解集优化了波束覆盖性能。 Moreover, a notional concept of Multipath Mitigation Area (MMA) is defined together with the corresponding boundary conditions, and the Low Observability Rate (LOR) is defined as a performance benchmark to evaluate the FDS-MIMO radar beam overage capability.
21759 理论分析和仿真结果表明由于充分利用了频率分集产生的距离依赖波束，该体制雷达相对传统MIMO相控阵雷达具有更优的低空波束覆盖性能，减小了米波雷达波瓣分裂和探测盲区。 Next, the FDS-MIMO radar low-altitude beam coverage performance is optimized according to the soutions of the boundary conditions. Both theoretical analysis and numerical results demonstrate the advantages of FDS-MIMO radar over the conventional phased-MIMO radar in terms of low altitude beam coverage performance, and the BS and RBA of meter-wave radar is decreased by ultilizing the range-dependent beam pattern.
21760 该文针对双基地MIMO雷达发射端、接收端皆为非均匀矩形阵列配置情况，将MIMO技术和最小冗余阵列相结合，提出基于双重孔径自由度扩展的目标发射俯仰角、发射方位角、接收俯仰角、接收方位角4参数联合估计新算法。 A new algorithm is proposed to estimate jointly the four parameters (EDOD, ADOD, EDOA,ADOA) of targets based on the double-extension of aperture degree of freedom by combining MIMO technique with Minimum redundancy array under the conditions of non-uniform rectangular array configurations both ontransmitter and receiver.
21761 首先利用矩阵Khatri-Rao积的运算特性，构造出2个置换矩阵，对接收信号进行矢量行变换，再通过数据的“去冗余”、“多维平滑”和“折叠”运算，使得新数据具备MIMO雷达自身和最小冗余阵列双重自由度扩展的特点。 Firstly, the two permutation matrices are constructed by utilizing the operational properties of the Khatri-Rao product of multiple matrices. Then the new data which possesses the characteristics of the double-extension of degree of freedom is attained by performing the twice row permutating, the redundant items deleting, multi-dimensional smoothing and data folding operations on the received data.
21762 理论和仿真结果表明：该文算法能够有效估计出目标的4个参数值，且能够实现自动配对； The results illustrate that: the proposed method can estimate the four parameters of targets efficiently, and the estimated parameters are paired automatically without extra pairing operation.
21763 在相同仿真条件下，该文算法的估计精度优于交替最小二乘和多维ESPRIT算法，并且提高了最大可估计的目标数目。 The parameter estimation performance of the proposed method is better than those of the ALS and multi-dimension ESPRIT methods under the same simulation conditions. And the proposed method can provide much stronger parameter identifiability than the conventional ones.
21764 在基于位置服务的个性化搜索中，利用可信第三方服务器以及对等节点是保护用户隐私的主要方法，但在现实生活中，它们却是不完全可信的。 For personalized search based on location service, the trusted third-party server and peer node are used as the main method for privacy preserving. However, entirely trusted third-party server or peer node does not exist in real life.