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Continuous-Wave Interference Mitigation for Acquisition Method in Unified Carrier TT&C Systems
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作者 Yunyun Wu Xiuli Yu Yongqing Wang 《Journal of Beijing Institute of Technology》 EI CAS 2018年第4期575-583,共9页
An interference mitigation for acquisition method,based on both energy center and spectrum symmetry detection,has been proposed as a possible solution to the problem of signal acquisition susceptibility to continuous-... An interference mitigation for acquisition method,based on both energy center and spectrum symmetry detection,has been proposed as a possible solution to the problem of signal acquisition susceptibility to continuous-wave interference(CWI)in unified carrier telemetry,tracking,and command(TT&C)systems.With subcarrier modulation index as a priori condition,the existence of CWI is determined by comparing the energy center with the symmetric center.In the presence of interference,the interference frequency point is assumed and culled;sequentially,the spectral symmetry is used to verify whether the signal acquisition is realized.Theoretical analysis,simulations,and experimental results demonstrate that the method can realize the acquisition of the main carrier target signal with an interference-to-signal ratio of 31 dB,which represents an improvement over the existing continuous-wave interference mitigation for acquisition methods. 展开更多
关键词 unified carrier telemetry tracking and command(tt&c) interference mitigation signal acquisition spectrum symmetry
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Introduction to the TT&C Scheme for Chang’e⁃5 Mission 被引量:1
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作者 HUANG Lei LI Haitao +2 位作者 DONG Guangliang CHEN Shaowu FAN Min 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2022年第5期530-540,共11页
Chang’e-5 mission is China’s first lunar sample return mission.It contains several new flight phases compared with the previous lunar missions,such as the lunar take-off and orbit insertion phase,the rendezvous and ... Chang’e-5 mission is China’s first lunar sample return mission.It contains several new flight phases compared with the previous lunar missions,such as the lunar take-off and orbit insertion phase,the rendezvous and docking phase,etc.Chang’e-5 mission is extremely complicated and full of new challenges.This paper sorts out the characteristics and the difficulties in telemetry,tracking,and command(TT&C)of Chang’e-5 mission.The main technical contribution is a reliable general design of the TT&C system,including the application of X-band TT&C in launch and early orbit phase(LEOP),multiple targets simultaneous TT&C in X-band,lunar surface benchmark calibration,high-precision and rapid orbit trajectory determination for the lunar surface take-off,remote guidance rendezvous and docking,the determination of the initial navigational value for the separation point of the Chang’e-5 orbiter and returner,and the design of the reentry measurement chain.Based on this scheme,a global deep space TT&C network and interplanetary reentry measurement chain have been established for China,and near-continuous TT&C support for China’s first extraterrestrial object sampling and return mission has been realized,ensuring reliable tracking,accurate measurement and accurate control.The global deep space network can provide TT&C support comparable to that of National Aeronautics and Space Administration(NASA)and European Space Agency(ESA)for subsequent lunar and deep space exploration missions.The techniques of rapid trajectory determination of lunar take-off and orbit entry,as well as high precision and remote guidance of lunar orbit rendezvous and docking can lay a technological foundation for the future manned lunar exploration missions and planetary sampling and return missions. 展开更多
关键词 chang’e-5 telemetry tracking and command(tt&c) the third phase of china lunar exploration program lunar exploration system design
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统一S波段测控信道调制指数设计方程 被引量:1
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作者 吴学英 《遥测遥控》 1999年第2期2-9,16,共9页
考虑了测距音提取滤波器以及返回噪声对统一S波段卫星测控信道的影响,采用图解和数学分析两种方法详细分析了已调载波的功率效率。在此基础上,分别推导出在有、无测距音提取滤波器两种情况下。
关键词 统一S波段 ^+测控 信道 调制
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DPSK-PM调制信号数字解调方法研究 被引量:1
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作者 李杨 唐海 《电子信息对抗技术》 2007年第1期22-25,共4页
针对卫星USB测控系统中常用的DPSK-PM调制技术,设计了一种简单的数字解调方法。在介绍算法原理的基础上,对解调算法进行了仿真,仿真结果证明了该方法的有效性。该方法对于航天测控链路信息对抗仿真平台的建立具有指导意义。
关键词 统一S波段 测控 锁相环 环路滤波器
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基于压缩感知的扩频信号统一捕获技术 被引量:1
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作者 王凯 吴斌 汪勃 《无线电工程》 2018年第5期378-385,共8页
为了应对不同的任务模式,新的测控体制不断涌现,多体制信号捕获技术成为研究热点。直接序列扩频和跳频扩频是当前扩频测控系统中最常见的2种信号体制,二者之间存在一定的差异,采用现有的接收设备会存在实时性受限、载荷负担重和采样压... 为了应对不同的任务模式,新的测控体制不断涌现,多体制信号捕获技术成为研究热点。直接序列扩频和跳频扩频是当前扩频测控系统中最常见的2种信号体制,二者之间存在一定的差异,采用现有的接收设备会存在实时性受限、载荷负担重和采样压力大等问题。在基于压缩感知原理的直扩、跳频捕获技术的基础上,构建了压缩感知扩频统一捕获接收框架,利用不同的稀疏矩阵、观测矩阵和捕获算法作为参数对不同体制的信号进行表达,实现信号捕获。统一捕获实现过程运用复用、优化的设计思路,节省了逻辑资源,降低了算法复杂度。仿真分析表明,提出的统一接收框架能有效地捕获接收扩频信号,相较于软件重载的捕获方法在对信号捕获的实时性上具有更加优异的性能。 展开更多
关键词 压缩感知 航天测控 直接序列扩频信号 跳频扩频信号 统一信号捕获
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