ID 原文 译文
24615 在电光转换中继节点采用解码转发协议降低噪声累积。 The decoding and forwarding protocol is adopted at the relay node to avoid accumulation of noise.
24616 基于系统端到端等价信噪比累积分布函数，获得了 RF/FSO 混合链路中断概率及平均误码率表达式。 Based on the cumulative distribution function of the system's end-to-end equivalent signal-to-noise ratio, the closed expressions for link outage probability and average bit error rate are derived.
24617 研究结果表明，采用相干二进制相移键控调制时，系统误码性能最优； The research results show that when using coherent binary phase shift keying modulation, the system has the best error performance.
24618 可通过增加用户数的方式来减弱干扰信号的影响。 The influence of interference signals can be reduced by increasing the number of users.
24619 携带轨道角动量的涡旋光束在自由空间光通信信道中传输时，信道中的湍流介质会改变涡旋光束的传播特性，破坏波前螺旋结构，最终直接影响通信的稳定性和可靠性。 When the vortex beam carrying orbital angular momentum (OAM) is transmitted in the free space opticalcommunication (FSO) channel, the turbulent medium in which will change the propagation characteristics of the vortex beam, destroy the spiral structure of the wave-front, and ultimately directly affect the stability and reliability of communication.
24620 针对现有实验研究在普适性方面的不足，本文选取基于相干光束合成技术的高功率涡旋光束阵列为研究光源，从理论角度出发，建立一套完备的体系架构，用以分析大气湍流引起的幅度和相位起伏对基于轨道角动量的自由空间光通信系统性能的影响。 To make up the shortcomings of the previously experimental research in the generalization, a high-power vortex beam array based on coherent beam combining (CBC) technology is selected as the research light source, and a complete system architecture is established from a theoretical point of view to analyze the impact of the amplitude and phase fluctuations caused by atmospheric turbulence on the performance of OAM based FSO communication systems.
24621 应用光学外差检测，对湍流条件下信噪比的随机分布进行详细的研究，并基于此得到多进制相移键控调制下符号错误概率的解析表达式，评估不同湍流信道参数、光源参数以及接收机参数对符号错误概率的影响。 Applying the optical heterodyne detection (OHD), the random distribution of signal-to-noise ratio (SNR) under turbulent conditions is studied in detail. Based on this, the analytical expression of symbol error probability (SEP) under the condition of Mary Phase-ShiftKeying (MPSK) has been derived, and the influence of different turbulence channel parameters, beam parameters and receiver parameters on SEP has been investigated.
24622 结果表明，增大阵列子光束束腰半径、阵列子光束个数，减小阵列环状半径，可以提高光束质量，优化系统性能。 The results suggest that increasing the beam waist radius of the array sub-beams and the number of the array sub-beams, and reducing the ring radius of the array can improve the beam quality and optimize the system performance.
24623 另外，较小的拓扑荷数、传播距离和湍流强度以及较大的接收孔径直径使得符号错误概率较低，对应的通信性能更佳。 In addition, the smaller topological charge, propagation distance and turbulence intensity, and larger receiver aperture diameter can make the symbol error probability lower and the corresponding communication performance better.
24624 针对移动群智感知中参与者积极性不高导致的数据质量低和激励成本高的问题，本文提出了一种基于混合用户模型与列表级排序学习算法相结合的协同排序任务推荐方法。 To solve the problem of low data quality and high incentive cost caused by the inactivity of participants inmobile crowd sensing, this paper proposes a task recommendation method.