ID 原文 译文
23755 其次利用线性变换滤除含有噪声项的虚拟阵元，并对协方差估计误差进行了白化处理，抑制了信号中的干扰项。 Then linear transform is used to eliminate the noise contained virtual array elements, whitening process is utilized to the estimation error of covariance matrix, as a result, the interference in signals is suppressed.
23756 最后建立了包含不同频点联合稀疏参数和网格失配参数的贝叶斯层次架构，推导了联合稀疏参数、网格失配参数的最小稀疏表达式并进行了迭代学习。 Finally, a Bayesian structure containing the joint sparsity parameter of different frequencies and off-grid parameter is built, the minimization sparse expressions of joint sparsity parameter and off-grid parameter are deduced and corresponding parameters are learned iteratively.
23757 较传统方法，该方法不依赖任何先验信息，更好地抑制了虚拟阵元中的噪声和干扰，降低了网格失配对 DOA 估计的影响，在低信噪比条件下具有更高的 DOA 估计精度和分辨率。 Compared with other methods, the proposed method does not rely on any prior information, suppresses the inference in virtual array elements more efficiently, reduces the effects of off-grid problem, and gets higher DOA estimation accuracy and resolution under low SNR condition.
23758 仿真实验验证了该方法的有效性。 Simulation experiments verify the validity of the novel algorithm.
23759 针对缺乏气象数据情况下低仰角对流层散射斜延迟的实时估计问题，该文提出一种基于射线描迹的对流层斜延迟估计方法。 Based on ray tracing, a real-time method of tropospheric scatter slant delay estimation is proposed to estimate the low-elevation tropospheric delay in the absence of meteorological data.
23760 该算法利用 UNB3m 模型获取大气气象参数，建立了对流层大气折射率剖面模型，克服了气象数据对射线描迹法中折射率计算的限制。 The model uses the UNB3m model to obtain atmospheric meteorological parameters, establishes the tropospheric atmospheric refractive index profile model, and overcomes the limitation of meteorological data on the refractive index calculation in the ray tracing method.
23761 选取亚洲地区 8 个国际 GNSS 服务(International GNSS Service, IGS)测站 2012 年的实测气象数据，计算对流层大气折射率剖面，验证了对流层延迟模型的精度小于 25 mm； The atmospheric refractive index profile of the troposphere is calculated by using the meteorological data of the International GNSS Service (IGS) stations in Asia in 2012, and the accuracy of the tropospheric delay model is verified to be less than 25 mm.
23762 选取基线距离适宜的 3 个测站分成 3 组散射通信比对站，利用射线描迹法计算了其在05°°∼入射角下全年的斜延迟。 The three stations with the baseline distance are selected and divided into three sets of scatter correspondence comparison stations. The oblique delay at 05°°∼ incident angle is calculated by ray tracing method.
23763 计算结果表明：3 组比对站最大单向传输斜延迟为 22.38∼48.37 m；在进行双向时间比对相互抵消 95%的情况下，时间延迟为 3.73∼8.07 ns。 The results show that the maximum one-way propagation delay is 22.38∼48.37 m for the three groups, and 3.73∼8.07 ns for the two-way time offset 95%.
23764 现有的自适应解调方案中采用的调制星座阶数最高仅限于 16，且方案分析和设计中没有考虑信道编码的译码环节。 The order of the modulation used in existing adaptive demodulation schemes is no higher than 16, and the decoding of channel codes is not taken into consideration in the analysis and design.