|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Lock threshold deterioration induced by antenna vibration and signal coupling effects in hypersonic vehicle carrier tracking system of Ka band显示文摘The envelope of a hypersonic vehicle is affected by severe fluctuating pressure, which causes the airborne antenna to vibrate slightly. This vibration mixes with the transmitted signals and thus introduces additional multiplicative phase noise. Antenna vibration and signal coupling effects as well as their influence on the lock threshold of the hypersonic vehicle carrier tracking system of the Ka band are investigated in this study. A vibration model is initially established to obtain phase noise in consideration of the inherent relationship between vibration displacement and electromagnetic wavelength. An analytical model of the Phase-Locked Loop(PLL), which is widely used in carrier tracking systems, is established. The coupling effects on carrier tracking performance are investigated and quantitatively analyzed by imposing the multiplicative phase noise on the PLL model. Simulation results show that the phase noise presents a Gaussian distribution and is similar to vibration displacement variation. A large standard deviation in vibration displacement exerts a significant effect on the lock threshold. A critical standard deviation is observed in the PLL of Binary Phase Shift Keying(BPSK) and Quadrature Phase Shift Keying(QPSK) signals. The effect on QPSK signals is more severe than that on BPSK signals. The maximum tolerable standard deviations normalized by the wavelength of the carrier are 0.04 and 0.02 for BPSK and QPSK signals,respectively. With these critical standard deviations, lock thresholds are increased from à12 andà4 d B to 3 and à2 d B, respectively. | Congying ZHU Lei SHI Xiaoping LI Yanming LIU Wei AI | 2018 | Chinese Journal of Aeronautics2018，31，4： | 4 |
| 2 | A Joint Beam Control Method of Optical TFD's and Phase Shifters in Phased Array Antennas 显示文摘 | Xiaoping Ai Zishu He Yuxiang Gao | 2004 | IEEE2004，0780，： | 1 |
| 3 | Index and retrieval in machining process planning using case-based rea- soning显示文摘 | Hsin-Chang Lijun Dong Xiaoping Frank Liu et aI | 2000 | Artificial Intelligence in Engineering2000，14，1： | 1 |
| 4 | Combining system dynamics and hybrid particle swarm optimization for land use allocation显示文摘 | Xiaoping Liu Jinpei Ou Xia Li Bin Ai | 2013 | Ecological Modelling2013，，： | 1 |
| 5 | A new landscape index for quantifying urban expansion using multi-temporal remotely sensed data显示文摘 | Xiaoping Liu Xia Li Yimin Chen Zhangzhi Tan Shaoying Li Bin Ai | 2010 | Landscape Ecology2010，，5： | 1 |
| 6 | Knowledge transfer and adaptation for land-use simulation with a logistic cellular automaton显示文摘 | Xia Li Yilun Liu Xiaoping Liu Yimin Chen Bin Ai | 2013 | International Journal of Geographical Information Science2013，，10： | 1 |
| 7 | Simulating Urban Form and Energy Consumption in the Pearl River Delta Under Different Development Strategies显示文摘 | Yimin Chen Xia Li Shujie Wang Xiaoping Liu Bin Ai | 2013 | Annals of the Association of American Geographers2013，，6： | 1 |
| 8 | A bottom-up approach to discover transition rules of cellular automata using ant intelligence显示文摘 | Xiaoping Liu Xia Li Lin Liu Jinqiang He Bin Ai | 2008 | 2008 (11-1)2008，，11： | 1 |
| 9 | A new landscape index for quantifying urban expansion using multi-temporal remotely sensed data显示文摘 | Xiaoping Liu Xia Li Yimin Chen Zhangzhi Tan Shaoying Li Bin Ai | 2010 | Landscape Ecology2010，，5： | 1 |
| 10 | A Bottom-up Approach to Discover Transition Rules of Cellular Automata Using Ant Intelligence 显示文摘 | Xiaoping Liu Xia Li Lin Liu Jinqiang He Bin Ai | 2008 | International Journal of Geographical Information Science2008，22，11： | 1 |
| 11 | Combining system dy-namics and hybrid particle swarm optimization for land use alloca-tion显示文摘 | Liu Xiaoping Ou Jinpei Li Xia Ai Bin | 2013 | Ecological Modelling2013，257，： | 1 |
| 12 | A Dynamic Model and a Simulation Method for Structural Reliability显示文摘ADynamicModelandaSimulationMethodforStructuralReliabilityDuXiaoping;AiZhiju;JinXuesong(NationalTractionPowerLaboratory,Southw... | Du Xiaoping Ai Zhiju Jin Xuesong (National Traction Power Laboratory,Southwest Jiaotong University,)Chengdu 6 1 0 03 1, China | 1995 | Journal of Modern Transportation1995，12，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员