摘要
核爆电磁脉冲波在由近区向远区传播过程中 ,由于受大地 -电离层波导的作用 ,会发生频谱漂移和色散现象 ,从而使远区探测到的电磁信号表现出明显的时变谱特征 ,根据产生该现象的物理机理 ,引入时频分析工具 ,对实际数据进行处理和分析 ,获得了较好的效果。
Due to the influence of ground and F layer, the frequency-floating and color-dispersing phenomena may happen when the NEMP (Nuclear-explosion Electromagnetic Pulse) spreading aboard, so that the signals which were from the far regions appear time-varying spectrum characteristic distinctly. To analyse and show this phenomenon more clearly, time-frequency analysis is used and the experiment show that Chirplet transform is a better tool.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2002年第6期492-495,511,共5页
Nuclear Electronics & Detection Technology
基金
国家自然科学基金 (49974 0 2 9)
国家高等学校骨干教师资助计划资助
