ID 原文 译文
13924 该算法首先对阵列接收信号进行白化, 利用白化后的接收信号构造STFD矩阵, 达到抑制STFD矩阵的交叉项、突出信号自项的目的, 然后利用K均值聚类提取各信号时频点, 最后运用MUSIC算法估计DOA。 Firstly, the algorithm whitens the array receiving signals, and constructs the STFD matrix using the whitened receiving signals, which can suppress the cross-terms and give prominence to the auto-terms. Then, the algorithm extracts the time-frequency points of each signal by utilizing K-means-clustering. Finally, the MUSIC algorithm is used to estimate the DOA.
13925 对不同角度间隔和不同信噪比时三种算法的估计均方根误差进行了仿真对比, 结果表明：相比经典时频MUSIC算法, 文中算法在小角度间隔和低信噪比时有更好的估计性能。 The root mean square error (RMSE) of three different algorithms in different angle interval and different signal-to-noise ratio (SNR) are simulated respectively. Compared with two classical time-frequency music algorithms, this algorithm has better estimation performance at small angle intervals and low SNR.
13926 基于感应电流率理论, 提出了将阻挡面积与口径场分布相结合的阻挡比计算方法, 修正了传统算法存在的入射场分布不均匀问题, 分析了金属桁架电磁窗中金属桁杆的散射效应, 研究了桁架阻挡比在特定天线口径场分布下对天线传输特性的影响, 以卡塞格伦天线为例计算了平行极化波入射桁杆阵列时的插入损耗, 并将计算结果与FEKO软件中矩量法仿真结果进行了对比验证。 Based on the theory of induced current rate, a method of calculating the relative shading rate combined the shielding area with the aperture field distribution is proposed. The problem of the inhomogeneity of the incident field in the traditional algorithm is modified. And the scattering of the metal bar in the electromagnetic window is analyzed. The effect of the grid shading rate on the antenna transmission characteristics under the aperture distribution of a specific antenna is discussed.The insertion loss of the planar array is calculated. The results are compared with the method of moments (MOM) simulation results using the FEKO software.
13927 结果表明:考虑天线口径场的阻挡比算法相比传统算法在计算精度上有了较大提高, 最大误差不超过0.1dB；金属桁架电磁窗的插入损耗不仅受阻挡面积与感应电流率的影响, 还与天线口径场能流密度分布有关；减小阻挡比, 是设计低损耗电磁窗的有效途径。 The results show that the relative blocking algorithm improves the accuracy greatly with the maximum error less than 0.1 dB compared with the traditional algorithm. The insertion loss of the electromagnetic window is not only affected by the shielding area and the induced current rate, but also by the aperture field energy flow density distribution. Reducing the relative blocking rate is an effective way to design the low-loss radome.
13928 提出了一种基于双旋转单偶极子阵列的联合谱参数估计算法。 A joint spectral parameter estimation algorithm based on double rotary single dipole array is proposed.
13929 通过旋转阵元及修正极化多重信号分类 (multiple signal classification, MUSIC) 算法中谱函数的导向矢量, 便能实现用两阵元进行多目标测向, 回避了传统算法中要求信号源个数小于阵元数的问题。 By rotating the array element and modifying the steering vector of the spectral function in the polarized MUSIC algorithm, a multi-objective direction finding can be realized with two elements, which overcomes the traditional algorithm requirements that the number of elements should be greater than that of the signal sources.
13930 仿真结果表明：在小快拍数、低信噪比的影响下, 该算法在测向性能上优于阵元数为6的极化空间谱估计算法, 且所用通道数少, 可降低成本。 The simulation results show that the proposed algorithm is superior in the performance to the traditional six-element polarization-sensitive uniform circular array under the influence of small snapshot and low signal-to-noise ratio (SNR), which can reduce the cost with fewer channels.
13931 该算法所述的单偶极子阵列可用任意极化敏感天线单元或组合进行构造, 可移植性较强。 The single dipole array described in this algorithm can be constructed with any polarized sensitive antenna element or combination, and can be easily applied to other structures.
13932 地空传播特性是机载无线电系统设计的重要依据, 电波传播试验数据是建立地空传播预测模型的基础。 The characteristics of the ground-air propagation is an important basis for the design of airborne radio systems, and the experimental data of ground-air propagation are of fundamental importance for the development and testing of prediction models.
13933 为了深入研究航空移动业务电波传播特性, 利用机载ADS-B (automatic dependent surveillance broadcast) 信号开展了地空传播试验, 对试验数据进行的分析表明, 实测传播损耗与ITU-R P.528-3模型预测损耗及自由空间传播损耗的变化趋势一致。 In order to study the characteristics of the wave propagation of the air mobile service in depth, the signal of airborne automatic dependent surveillance broadcast (ADS-B) system is used to get the experimental data of the ground-air propagation.The experimental data are analyzed, and the results show that the measured transmission loss data have the similar variation trend with the ones predicted by ITU-R P.528-3 and the free space propagation model.