ID 原文 译文
39356 针对UUV舷侧阵存在观测信号波达方向估计结果有误差的情况，提出了基于均匀先验分布的Bayesian自适应波束形成方法(UB)。 This paper proposed a uniform prior distribution based Bayesian adaptive beamforming algorithm(UB) for UUV flank array under the presence of the DOA error. The DOA of the desired signal is assumed to be a random variable with a prior uniformly distribution in an interval.
39357 该方法假设期望信号的到达方向是区间内服从均匀先验分布的一个变量，利用含有均匀先验分布信息的阵列接收数据和Bayesian后验分布来估计期望信号的到达方向，最后计算权矢量。 By using the received data vectors, which considers the average effect of the DOA error, and the Bayesian posterior distribution, UB can estimate the DOA of the desired signal, subsequently calculate the weight vectors.
39358 仿真结果表明，该方法对观测信号方向误差具有较好的稳健性，其阵列方向图的主波束不受观测方向误差的影响，始终对准信号的到达方向，其输出信干噪比随着输入信噪比、快拍数的增加而稳定增加，随着观测方向误差的增大而保持稳定的恒定值。 Simulation results show that the algorithm outperforms other beamforming algorithms with the presence of the desired DOA error. The mainlobe of array beampattern always aligned with the direction of the arrival signal. The output signal to inference noise ratio(SINR) increases steadily with the input signal to inference noise ratio(SNR) and the number of snapshots. Simultaneously, it also maintains a stable constant value with the error of observed direction increases.
39359 5G时代的到来加快了以车路协同为核心的车联网技术的发展脚步。 The advent of the 5 G era has accelerated the development of IoV technologies with vehicle-road collaboration at the core.
39360 高效，可靠，安全的通信质量将是实现智能交通管理系统，完善智慧出行的基本要求。 Efficient, reliable, and secure communication quality will be the basic requirements for implementing an intelligent traffic management system and improving smart travel.
39361 因此，针对存在信息窃取者的车联网中继协作传输场景，利用机会式中继选择策略与最大比合并技术设计了直接传输链路与多跳中继转发链路共存的安全传输方案，旨在提高信息传输的可靠性及安全性。 Therefore, for the scenario of relay cooperative transmission of IoV where information stealers exist, an opportunistic relay selection strategy and maximum ratio combining technology are used to design a secure transmission scheme in which the direct transmission link and the multi-hop relay forwarding link coexist, aiming to improve the reliability and security of information transmission.
39362 同时，在获得信道概率密度函数及累积分布函数的基础上，利用全概率公式等方法推导出基于DF(Decode-and-Forward)中继协作传输的车联网系统安全中断概率的闭合表达式，其中涉及的信息传输信道均服从Nakagami-m分布，提高了理论推导的难度。 At the same time, based on obtaining the channel probability density function and cumulative distribution function, a closed expression for the secure outage probability of the IoV system based on DF(Decode-Forward) relay cooperative transmission is derived using methods such as the full probability formula.The information transmission channels involved are all subject to the Nakagami-m distribution, which makes the theoretical derivation more difficult.
39363 最终的仿真实验证实了理论推导的准确性及本方案的可行性。 The final simulation experiments confirmed the accuracy of the theoretical derivation and the feasibility of the scheme.
39364 针对NLOS(Non-Line-of-Sight)传播环境中单次与多次散射路径的识别问题，本文基于单次散射圆环模型建立了一种二次散射圆环模型，对该模型的统计特征进行了分析。 Aiming at the problem of identifying single and multiple scattering paths in the NLOS(Non-Line-of-Sight) propagation environments, in this paper a secondary scattering ring model based on single scattering ring model is proposed, and the statistical characteristics of this model are analyzed.
39365 同时，基于信号统计检测理论建立了一种单次与二次散射路径检测模型， At the same time, based on the theory of signal statistical detection, a single-shot and a second-shot scattering path detection model are established.