| 摘要: |
| 研究了低信噪比强窄带干扰条件下的LFM信号检测技术,提出了基于短时傅里叶变换(STFT)的线性调频(LFM)信号增强技术、基于时频峰值滤波的强窄带干扰抑制技术和基于一维搜索的宽带LFM信号检测技术.试验结果表明,采用以上这些方法在低信噪比强窄带干扰情况下,对于LFM信号具有较高的正确检测概率及参数测量精度. |
| 关键词: 宽带数字接收机 信号检测 窄带干扰 时频峰值滤波 短时傅里叶变换 |
| DOI：10.3969/j.issn.1001-893X. |
| 投稿时间：2006-07-17修订日期：2006-10-15 |
| 基金项目: |
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| Comparison and Analysis of LFM Signal Detecting Techniques under Low SNR and Strong Narrowband Jamming Conditions |
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| Abstract: |
| The LFM signal detecting techniques under low SNR and strong narrowband jamming conditions are studied. The LFM signal enhancement technique based on STFF, narrow band jamming restrain technique based on time - frequency peak filtering and wide band LFM detecting technique are put forward. The experiment result proves that high detecting probabilities and parameter measuring accuracy can be obtained by these methods under low SNR and strong narrow jamming conditions. |
| Key words: wide band digital receiver signal detection narrow band jamming time - frequency peak filtering STFF |
《电讯技术》编辑部 