| 摘要: |
| 针对传统调制域检测法在提取雷达信号脉内特征中的不足，提出了一种通过检测极值点来提
取信号脉内特征的方法。首先通过检测出信号极值点，再对极值点进行运算处理，进而提取
出极值点中包含的脉内特征信息。该方法借助于极值点具有最大信息量的优势,并运用二次
提取频率来估计码元宽度，使得算法的信噪比性能得到有效改善。仿真结果表明，与传统调
制域检测法相比，该方法在低信噪比下对于多种类型信号的脉内特征参数的估计精度平均提
高30%。 |
| 关键词: 雷达信号 脉内特征提取 极值点检测 调制域 |
| DOI： |
|
| 基金项目: |
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| A New Intra pulse Feature Extraction Approach for Radar Signals Based on Modulation Domain |
| LI Zhen-xing,ZHANG Guo-yi |
| (Department of Aviation Communication Counter,Aviation University of Air Force,
Changchun 130022,China) |
| Abstract: |
| In allusion to the lack of the existing modulation domain approach in extract
ion the intra-pulse feature of radar signals, a new extraction approach is propo
sed by detecting extremum points.
The approach gains the extremum points of radar signals at first, and then proce
sses the extremum points to extract the intra-pulse feature of the signals. It m
akes use of the maximum information of the extremum points and the thought of ex
tracting the frequency twice to estimate the width of the subcode, which can imp
rove the SNR performance of the approach effectively. Simulation results show th
at compared with the existing modulation domain approach，the proposed one has a
30% improvement in average precision estimation rate to the different intra-pul
se features of the radar signals in the condition of a low SNR(Signal-to-Noise R
atio). |
| Key words: radar signal intra-pulse feature extraction extremum points detection modula
tion dom
ain |
《电讯技术》编辑部 