| 时频分析在跳频信号中的应用 |
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| 引用本文： | 齐昶,苏立,王斌. 时频分析在跳频信号中的应用[J]. 信息工程大学学报, 2010, 11(6): 762-768 |
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| 作者姓名： | 齐昶 苏立 王斌 |
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| 作者单位： | [1]信息工程大学信息丁程学院,河南郑州450002 [2]92388部队,河南许昌461101 |
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| 摘 要： | 时频分析是非平稳信号处理领域中广泛应用的重要技术之一,跳频信号作为一种典型的非平稳信号,时频分析方法是对其进行检测、参数估计的重要方法。文章从提高时频聚焦性、抑制交义项干扰及减少运算量3个方面对各种常用的时频分析工具进行综合比较,并把在地震信号处理方面得到成功应用的S变换,应用到跳频信号处理中,取得了较好的效果。仿真结果表明：短时哈莱特变换运算量最小;S变换具有灵活的时频聚集性;不同时频分布组合、谱图、SPWVD、重排类分布能获得清晰的时频图。
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| 关 键 词： | 跳频 时频分析 时频聚焦性 交叉项干扰 |
Time-Frequency Analysis of Frequency Hopped Signals |
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| QI Chang,SU Li,WANG Bin. Time-Frequency Analysis of Frequency Hopped Signals[J]. , 2010, 11(6): 762-768 |
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| Authors: | QI Chang SU Li WANG Bin |
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| Affiliation: | 1.Institute of Information Engineering,Information Engineering University,Zhengzhou 450002,China;2.Unit 92388,Xuchang 461101,China) |
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| Abstract: | Time-frequency analysis is an important tool of frequency hopped detection,and is an impotant approach to attain clarified time-frequency picture in order to estimate the parameter of frequency hopping signals.This paper uses all kinds of time-frequency analysis tools including linear time-frequency represeatation,quadratic time-frequency distribution,different time-frequency distritution integration method for simulation of frequency hopped signals.Simulation results demonstrate spectrum picture,power distritution,linear and non-linear time-frequency distribution integration method can attain clarified time-frequency picture. |
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| Keywords: | frequency hopped signals time-frequency analysis time-frequency concentrate cross-term interference |
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