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卫星导航终端抗干扰性能关联参数研究

舰船电子工程 2024年第2期44卷 55-61页

作者：武智佳于合理代桃高耿泽淇焦海松贾赞杰中国人民解放军63883部队洛阳471000

针对当前缺乏从信号处理角度分析与卫星导航终端抗干扰性能的相关因素,论文围绕干扰信号对射频前端、捕获和跟踪、定位解算过程的影响,结合实际和仿真进行具体分析,提出了干扰信号与有用信号区分能力、方位稳定度、恢复时间的射频前端... 详细信息

针对当前缺乏从信号处理角度分析与卫星导航终端抗干扰性能的相关因素,论文围绕干扰信号对射频前端、捕获和跟踪、定位解算过程的影响,结合实际和仿真进行具体分析,提出了干扰信号与有用信号区分能力、方位稳定度、恢复时间的射频前端关联参数,捕获灵敏度、重捕获灵敏度、跟踪灵敏度、跟踪门限的捕获和跟踪过程关联参数,定位精度保持能力、数据处理策略的定位解算过程关联参数。最后,针对各关联参数设计了相应的实验进行分析,说明了提出的关联参数对卫星导航终端抗干扰性能的具体影响。

关键词：抗干扰性能关联参数射频前端捕获跟踪定位解算

Evolution model and failure mechanisms of rainfall-induced cracked red clay slopes:insights from Xinshao County,China

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Journal of Mountain Science 2024年第3期21卷 867-881页

作者： jiao Weizhi ZHANG Ming LI Peng XIE Junjin PANG haisong LIU Fuxing YANG Long Faculty of Engineering China University of GeosciencesWuhan 430074China

Red clay landslides are widely distributed worldwide,resulting in severe loss of life and *** rainfall-induced red clay slopes have received extensive attention,the role of cracks in the evolutionary process of red clay slopes and their connection to failure mechanisms is still poorly understood.A comprehensive approach integrating field investigation,laboratory tests,and numerical simulations was conducted to study the 168 red clay landslides in Xinshao County,*** results show that red clay is prone to forming cracks at high moisture content due to its low swelling and high shrinkage *** failure mode of red clay slopes can be summarized in three stages:crack generation,slope excavation,and slope ***,the retrospective analysis and numerical simulations of the typical landslide in Guanchong indicated that intense rainfall primarily impacts the shallow layer of soil within approximately 0.5 m on the intact ***,cracks change the pattern of rainfall infiltration in the *** infiltrates rapidly through the preferential channels induced by the cracks rather than uniformly and slowly from the slope *** results in a significant increase in both the depth of infiltration and the saturated zone area of the cracked slope,reaching 3.8 m and 36.2 m^(2),***,the factor of safety of the slope decreases by 13.4%compared to the intact slope,ultimately triggering *** study can provide valuable insights into understanding the failure mechanisms of red clay slopes in China and other regions with similar geological settings.

关键词： Red clay slopes Cracks Preferential flow Failure mechanism

Antenna Circular Rotation Method for Detecting Receiver Dynamic Positioning Accuracy

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Antenna Circular Rotation Method for Detecting Receiver Dyna...

Test and analysis of interference effects on dual frequency GNSS receiver

第四届中国卫星导航学术年会

作者： jiao haisong Li Shentang Yang Haiqiang Jiang Liangjian Wang Lili State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System The 63880 troop The 22nd Research Institute of CETC

The paper firstly introduces circumferential rotation testing system by which GPS receiver’s dynamic performance can be examined, secondly analyzes the change rule of Doppler frequency shift caused by the circumferential rotation of antenna, respectively compares the states of antenna circumferential rotation and the linear moving of airborne by investigating the Doppler shift and Doppler shift changing rate, then puts forward the basic method for detecting receiver dynamic positioning accuracy via antenna circumferential rotation to simulate the state of the airborne linear motion by investigating Doppler shift changing rate. As an example, by using a NovAtel RT2 GPS receiver, the paper gives accuracy analysis of the GPS receiver point positioning and carrier phase differential positioning under the condition of antenna circumferential rotation with the proposed method, and gives the Receiver’s accuracy of point positioning and carrier phase differential positioning under different moving states as well. Finally, points out the application and popularization of the proposed method in detecting dynamic accuracy and tracking performance of Compass and GPS of other types.

关键词： Receiver·Dynamic·accuracy·Circumferential rotation·Detection

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Test and analysis of interference effects on dual frequency ...

Verification of Receiver Dynamic Measurement Accuracy Based on Precision Trigger Time Record

第五届中国卫星导航学术年会

作者： Feng Li He Huang Haiqiang Yang Hong Liu Min Liu haisong jiao Luoyang Electronic Equipments Test Center

ISBN: (纸本)9783642547362

High accuracy GNSS receivers generally eliminate ionospheric delay by adopting dual or multi frequency error correction model to obtain desirable positioning results. However, dual-frequency GNSS receivers also face with radio frequency interference （RFI） in actual application, especially in complicated electromagnetic environment. In this paper, the analysis of carrier to noise ratio（C/N 0 ） and standard deviation of positioning in interference was introduced, and a test on the actual performance of a typical dual-frequency GPS receiver in interference at the two working frequencies was presented. The test results showed that: as the intensity of interference increased, the C/N 0 of signal descends obviously, thereupon the pseudo-range measurement precision for viewed satellites declined, leading to the loss of positioning accuracy. DGPS carrier phase measurement was recommended under interference condition in this article. By the carrier phase differential approach, the measurement error caused in the course of RFI was eliminated, and better results can be achieved if the number of satellites viewed is favorable.

关键词： Interference . Dual‐frequency . Pseudo‐range positioning . Carrier phase differential.

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Verification of Receiver Dynamic Measurement Accuracy Based ...

第九届中国卫星导航学术年会

作者： haisong jiao He Huang Liangjian Jiang Qingliang Chen Feng Li Chong Zhang Dexin Zhang Hong Liu

In this paper, GNSS receiver dynamic accuracy verification environment is constructed. High precision trigger time recording circuit is designed with the precise time synchronization function of the timing receiver. By measurement and recording of the precise time of the receiver antenna’s touch position under the dynamic condition, the "true value" of the location of the receiver measuring time is calculated, the verification of the dynamic measurement accuracy of the receiver is finally realized.

关键词： Trigger time record Receiver Dynamic Accuracy verification

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相位调制量子噪声随机加密系统的仿真验证

光学学报 2020年第16期40卷 18-23页

作者：陈毓锴蒲涛郑吉林焦海松李云坤陆军工程大学通信工程学院江苏南京210007

量子噪声随机加密(QNRC)是一种结合了量子力学原理和经典流密码思想的信息抗截获通信方法。为了对相位调制(PSK)QNRC系统的特性进行仿真验证,利用VPI仿真软件搭建了一套基于商用组件的仿真系统。基于任意波形发生器生成密文电信号及密... 详细信息

量子噪声随机加密(QNRC)是一种结合了量子力学原理和经典流密码思想的信息抗截获通信方法。为了对相位调制(PSK)QNRC系统的特性进行仿真验证,利用VPI仿真软件搭建了一套基于商用组件的仿真系统。基于任意波形发生器生成密文电信号及密钥电信号,并在接收端利用相位调制器及差分相移键控(DPSK)接收机从多进制密文信号中恢复二进制信号,最终实现了密文进制数为256,数据传输速率为2.5Gbit/s,传输距离为500km的无误码传输。与强度调制(ISK)方案相比,PSK方案避免了解调时收、发双方功率必须匹配的问题。进制数的增加不会劣化PSK方案的传输性能,有助于提高系统安全性,PSK方案具有潜在的安全性优势。

关键词：光通信抗截获通信量子噪声随机加密差分相移键控解调 Y-00协议

正交相移键控量子噪声随机加密系统的安全性研究

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激光与光电子学进展 2020年第17期57卷 124-132页

作者：陈毓锴郑吉林焦海松蒲涛曹阳中国人民解放军陆军工程大学通信工程学院江苏南京210007

以保密容量为评价指标,定量分析了正交相移键控(QPSK)量子噪声随机加密(QNRC)系统的物理层安全性。分别建立了密钥和数据窃听信道模型,推导了密钥保密容量及数据保密容量的表达式,并得到了系统的最大可达安全速率。评估了关键系统参数(... 详细信息

以保密容量为评价指标,定量分析了正交相移键控(QPSK)量子噪声随机加密(QNRC)系统的物理层安全性。分别建立了密钥和数据窃听信道模型,推导了密钥保密容量及数据保密容量的表达式,并得到了系统的最大可达安全速率。评估了关键系统参数(进制数、内部光放大器增益、介观相干态功率)对QPSK-QNRC系统密钥及数据安全性的影响,并在同一框架下与相移键控(PSK)-QNRC系统进行了比较。结果表明,关键系统参数对两个系统安全性的影响规律一致,相比PSK-QNRC系统,QPSK-QNRC系统的密钥安全性和最大可达安全速率较高,数据安全性略低,且介观功率水平较强。同时发现,PSK-QNRC系统的最大可达安全速率主要受限于密钥的安全性,而QPSK-QNRC系统的最大可达安全速率主要受限于数据的安全性。

关键词：光通信正交相移键控相移键控保密容量物理层安全

相位漂移对相位编码QKD系统及截获-重发攻击的影响研究

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激光与光电子学进展 2015年第4期52卷 209-216页

作者：焦海松王衍波何敏朱勇张志永中国人民解放军理工大学通信工程学院江苏南京210007

针对相位编码量子密钥分发(QKD)系统中存在的相位漂移和截获-重发攻击,分析了双马赫-曾德尔干涉仪QKD系统,给出了探测器的输入信号模型,计算了系统量子误码率及窃听信息量,并为提高密钥生成率提供了一种可能的方法。研究表明,相位漂移... 详细信息

针对相位编码量子密钥分发(QKD)系统中存在的相位漂移和截获-重发攻击,分析了双马赫-曾德尔干涉仪QKD系统,给出了探测器的输入信号模型,计算了系统量子误码率及窃听信息量,并为提高密钥生成率提供了一种可能的方法。研究表明,相位漂移会使系统误码率增加,稳定性降低;相比理想的截获-重发攻击,窃听信息量有所下降,因此密性放大过程对窃听信息的估计值可以相对减小,最终密钥生成率得以提高。在不考虑传输光纤中的相位相对漂移时,误码率随相位漂移角度呈余弦变化,全部截获-重发攻击时的变化周期是无窃听时的一半,变化频率更加剧烈。55%部分窃听时,若合法通信者选择误码阈值为15%,窃听者可获得25.5%的信息量且不被发现。

关键词：量子光学量子密钥分发双马赫-曾德尔干涉仪相位漂移量子误码率窃听信息量

一种用于GNSS接收机动态精度检定的系统设计

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测绘科学技术学报 2018年第2期35卷 117-120,125页

作者：焦海松张德欣江良剑王博张冲李锋中国洛阳电子装备试验中心河南洛阳471003

主要介绍了GNSS接收机动态精度检定系统的设计。提出了利用光电传感器的快速响应特性构建GNSS接收机动态精度检定系统的基本方法;设计了基于FPGA和授时模块的高精度触发时间记录电路;给出了利用精确触发时间和触发位置确定动态条件下接... 详细信息

主要介绍了GNSS接收机动态精度检定系统的设计。提出了利用光电传感器的快速响应特性构建GNSS接收机动态精度检定系统的基本方法;设计了基于FPGA和授时模块的高精度触发时间记录电路;给出了利用精确触发时间和触发位置确定动态条件下接收机测量数据"真值"的计算方法;最后分析讨论了该系统检定时的主要误差因素与精度评估方法。该系统可实现GNSS接收机动态测量精度的检定。

关键词：光电传感器精密时间记录 GNSS接收机动态测量精度检定