ID 原文 译文
58278 北斗 B1 频点信号采用二次编码结构，而二次编码使用的 NH( Neumann-Hoffman) 码会发生比特跳变，导致接收机捕获性能降低，对此，提出一种基于伪码与多普勒频率分离的北斗信号捕获算法. Beidou B1 frequency signal using the secondary encoding structure，bit-flipping of NeumannHoffman ( NH) codes used for secondary encoding leads to a decrease in receiver acquisition performance. Aiming at this problem，a Beidou signal acquisition algorithm based on pseudocode and Dopplerfrequency separation is proposed.
58279 该算法将接收信号分为两路，利用延迟差分运算和测距码的双极性分别对两路信号进行处理，消除了 NH 码比特跳变带来的影响. The algorithm divides the received signal into two paths，and uses thedelay difference operation and the bipolarity of the ranging code to process the two signals respectively，thus eliminating the influence of the bit hopping of the NH code.
58280 在此基础上使用匹配滤波器捕获码相位，使用快速傅里叶变换搜索多普勒频移，实现了码相位和多普勒频移的同时捕获. Based on this，the matched filter isused to capture the phase of the code and the fast Fourier transformation is used to search for the Dopplerfrequency. Capturing the phase and the Doppler frequency at the same time is realized.
58281 仿真结果表明，提出的算法成功捕获到了 NH 码跳变的信号，且在相同虚警率下灵敏度相比部分匹配滤波和快速傅里叶变换算法约有 1.03 dB 的提升. Finally，the simulation results show that the proposed algorithm successfully captures the signal with bit-flipping. Compared to partial matched filtering-fast Fourier transformation algorithm，the sensitivity is 1. 03 dB increased under the same false alarm rate.
58282 为了有效提升轨道角动量( OAM) 态的检测效率，提出一种基于快速傅里叶变换( FFT) 的 OAM 态成分检测方法. In order to effectively improve the detection efficiency of orbital angular momentum ( OAM) ，we propose an OAM detection method based on post information processing.
58283 在马赫曾德尔干涉仪 2 臂上加入道威棱镜，其中一个道威棱镜设置为 0，另一个道威棱镜设置为 0 ～ 180°旋 转，以接收干涉总光强，并对总光强进行 FFT，从而在 FFT 域中提取 OAM 态的成分信息.数值仿真结果表明，该方法可有效地实施单个 OAM 态和复用 OAM 态的成分检测.不同于传统 OAM 态的检测方法，本方法可同时获取对FFT 域设定子区间内总能量的判决.当该方法被应用于 OAM 通信系统时，能直接判决各 OAM 态信息，显著减小系统噪声对 OAM 复用通信性能的影响. In the proposed detectionmethod，a Mach-Zehnder interferometer is applied，and two doves are placed in each arm of the interferometer，where one is setup to 0 degree，and the other is rotated from 0 to 180 degree. The interferencebeam is received and the fast Fourier transform ( FFT) is operated on the received signal. In the FFT domain，each OAM component is separated，named OAM spectrum. Numerical simulation results show thatit is separable for one OAM mode，and multiplexed OAM mode by the proposed OAM detection method. Different from the general OAM separation method，the proposed method can obtain the OAM informationby summarizing the total energy during a period in FFT domain. And the performance of the communication system can be improved by using this detection method.
58284 针对复杂电磁脉冲噪声环境下的空闲信道检测难题，提出一种基于贝叶斯统计推理框架的新检测算法. Aiming at the idle channel detection problem under impulsive noise environments，a newdetection scheme is proposed based on Bayesian statistical reasoning framework.
58285 为了应对脉冲干扰并提升检测精度，建立了一种全新的动态状态空间模型，采用伯努利随机有限集来描述脉冲噪声与信道状态的动态变化特性. To cope with impulsiveinterference and improve probability of detection，a novel dynamic state-space model is established，inwhich the dynamic variations of impulsive noise and channel status are described by Bernoulli randomfinite sets.
58286 在此基础上，基于序贯估计与粒子滤波理论，设计出一种新型信道检测机制. On the basis of above，a novel channel detection mechanism is designed based on sequentialestimation and particle filtering theory.
58287 在检测信道状态的同时，对脉冲噪声出现时间和幅值进行联合估计，有效消除了其对信道检测的干扰; At the same time of detecting channel status，the proposedscheme jointly estimates the occurrence and amplitude of impulsive noise，therefore eliminating its interference on channel detection.