ID 原文 译文
22315 仿真实验表明，平移嵌套阵列自由度高于原嵌套阵列，在低信噪比、小快拍数、存在互耦影响条件下，基于稀疏贝叶斯学习的平移嵌套阵列测向算法测向精度优于原嵌套阵列测向算法，并且提高了原嵌套阵列测向算法的角度分辨率。 Simulation results show that the translational nested array has higher degree of freedom than the original nested array. Under the scenarios of low Signal-to-Noise Ratio (SNR), snapshot deficiency, and mutual coupling effect, the performance of direction finding algorithm for translational nested array based on Sparse Bayesian Learning is better than that of direction finding algorithm for the original nested array. The angle resolution of direction finding algorithm for the original nested array is improved.
22316 相比于传统两步定位方法，直接定位方法具有更高的定位精度，但现有的基于阵列模型的直接定位方法未能够有效利用多普勒频移信息，其定位精度有待进一步提升。 The Direct Position Determination (DPD) methods outperform the classic two-step localization methods in localization accuracy, while the existing DPD methods based on array antenna models do not exploit Doppler frequency shift information to improve localization accuracy further.
22317 针对上述问题，该文提出一种融合多普勒频移信息的阵列数据域直接定位方法。 Fusing Doppler frequency shift information, a DPD method based on array antenna model is proposed to overcome the above mentioned shortcoming.
22318 首先构建了融合多普勒信息的直接定位模型，然后基于最大似然准则将信号源位置估计转化为求解位置信息矩阵最大特征值问题，并结合矩阵转置性质降低复杂度，最后通过 2 维搜索得到目标信号源位置估计。 Firstly, a DPD model fusing Doppler frequency shift information is constructed. Then, a maximum likelihood estimator is designed and emitter's position estimation is transformed to calculating the maximum eigenvalue of the matrix containing location information. The property of eigenvalue keeping unchanged after matrix transpose is used to simplify the calculation. Finally, the emitter's position is estimated via a two-dimensional grid search.
22319 仿真结果表明，所提方法较目前的阵列数据域直接定位方法和多普勒频移直接定位方法的定位精度具有较大提高。 Simulations show that the proposed method is superior over the DPD methods based on array antenna models and the DPD methods only using Doppler frequency shift information in localization accuracy.
22320 水下滑翔机的运动导致滑翔机位置和相对距离的变化，引起了滑翔机间的信号传输时间改变，进而导致水下滑翔机间通信可靠性的下降。 The movement of the underwater gliders leads to the change in the position and relative distance among the gliders, which causes a change in the propagation delay of packets between gliders, and then it leads to a decrease in the reliability of communication between underwater gliders.
22321 传统水下媒体接入控制(MAC)协议面向静态拓扑网络，不适用于动态变化的网络拓扑。 The traditional underwater Media Access Control (MAC) protocols are for static topology networks and do not apply to dynamically varying network topology.
22322 该文提出一种水下滑翔机组网的动态 MAC 机制。 Thus, a new MAC mechanism for the underwater glider networks is proposed.
22323 新机制利用水下滑翔机运动模型进行位置预测，根据预测结果和相邻滑翔机间的位置共享动态计算时隙长度，并进行分配和预约收发，水下滑翔机在收发过程中以团队协作方式避免冲突。 It predicts location based on underwater glider motion model. It calculates time slots dynamically according to the predicted results and the shared position information of underwater gliders. Then, it allocates time slots and reserves to the send and the receive. Underwater gliders avoid collisions with teamwork in the process of sending and receiving.
22324 实验结果表明，该机制的数据包投递率与运动预测 MAC(P-MAC)和预约 MAC(R-MAC)协议相比分别提高了 12%和 25%，更适用于由水下滑翔机组成的动态网络。 Simulation results show that in this mechanism, the packet received rate increases by 12% and 25% comparing to the Prediction based MAC (P-MAC) protocol and Reservation based MAC (R-MAC) protocol, respectively. The result indicates that the new mechanism is more suitable for the dynamic network composed of underwater gliders.