目标辐射噪声中线谱序列的提取方法

不同类型目标辐射噪声包络谱中的线谱及其谐波分布存在较大差异，是进行目标检测和分类识别的重要线索。本文提出了一种基于能量判据和子频带综合的线谱序列提取方法，并利用实测数据进行了比较分析。仿真和对实际数据分析的结果表明，该方法能够较准确、稳定提取线谱序列，为目标检测和分类识别提供了可靠依据。

Extraction of line-spectrum series from target's radiated noise

The distribution of line-spectrum and its harmonics extracted from the spectral envelope of different target's radiated noise exhibits strong differences, which may provide important clue for the detection and classification of targets. A new method to extract line-spectrum series based on energy criterion and sub-band synthesis is presented in this paper, and verification is further investigated with simulated and measured data. The results show that the new method has the advantage of relative accuracy and stability over traditional method.