| 基于PSK调制信号的无源成像系统模糊函数分析 |
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| 引用本文： | 张 磊,碗超凡,刘振星,尹治平.基于PSK调制信号的无源成像系统模糊函数分析[J].太赫兹科学与电子信息学报,2019,17(5):861-865. |
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| 作者姓名： | 张 磊 碗超凡 刘振星 尹治平 |
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| 作者单位： | Academy of Photoelectric Technology，Hefei University of Technology，Hefei Anhui 230009，China,Academy of Photoelectric Technology，Hefei University of Technology，Hefei Anhui 230009，China,1.School of Information Science and Technology，University of Science and Technology of China，Hefei Anhui 230027，China；2.China Aerospace Science and Technology Corporation，Beijing 100048，China and Academy of Photoelectric Technology，Hefei University of Technology，Hefei Anhui 230009，China |
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| 基金项目： | 国家自然科学基金青年科学基金资助项目(61401140) |
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| 摘 要： | 从双基地成像系统的模糊函数出发，针对相移键控(PSK)调制信号的特点，引入平均模糊函数的概念。利用求取期望的方式消除码元序列的随机性对系统模糊函数的影响，详细推导了基于PSK调制信号的无源成像系统的广义模糊函数，并通过仿真实验分析了信号波形参数对系统分辨性能的影响。结果表明，PSK调制信号的序列长度和滚降系数对系统分辨性能的影响很小。
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| 关 键 词： | PSK调制信号 无源成像系统 广义模糊函数 分辨性能 |
| 收稿时间： | 2018/1/12 0:00:00 |
| 修稿时间： | 2018/3/6 0:00:00 |
Generalized ambiguity function analysis for passive imaging systems using PSK modulating signal |
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| ZHANG Lei,WAN Chaofan,LIU Zhenxing and YIN Zhiping.Generalized ambiguity function analysis for passive imaging systems using PSK modulating signal[J].Journal of Terahertz Science and Electronic Information Technology,2019,17(5):861-865. |
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| Authors: | ZHANG Lei WAN Chaofan LIU Zhenxing and YIN Zhiping |
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| Abstract: | The formula of the generalized ambiguity function of passive imaging system using Phase Shift Keying(PSK) modulating signals is derived in detail. Considering the characteristics of signals, the concept of average ambiguity function is introduced to remove the effect of particular sequence of symbols on the ambiguity function. Then the influence of the waveform parameters of the PSK modulating signals on spatial resolution is investigated by numerical simulations. The results indicate that the influence of the length of the symbol sequence and the roll-off factor is very slight. |
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