| 基于谐波恢复方法的直升机声信号特征提取 |
| |
| 引用本文： | 周忠来,施聚生,栗苹. 基于谐波恢复方法的直升机声信号特征提取[J]. 军械工程学院学报, 1999, 0(2) |
| |
| 作者姓名： | 周忠来 施聚生 栗苹 |
| |
| 作者单位： | 军械工程学院弹药技术处理教研室!石家庄，050003，北京理工大学机电工程系!北京，100081，北京理工大学机电工程系!北京，100081 |
| |
| 摘 要： | 在对直升机声信号特征进行分析之后，提出了一种基于谐波恢复的ESPRIT方法来提取直升机声信号谐波频率作为特征用以识别直升机声目标。同时对ESPRIT方法与其它方法在提取谐波能力方面作了比较。最后对实测的直升机声信号进行了谐波提取。各种结果均显示谐波恢复的ESPRIT方法在提取谐波频率方面较之其它方法更为优越，用它提取直升机声信号特征是十分有效的。
|
| 关 键 词： | 直升机 声信号 ESPRIT 特征提取 |
FEATUKE EXTRACTION OF HELICOPTER ACOUSTIC SIGNAL BASED ON HARMONIC RETRIEVAL |
| |
| Zhou Zhonglai, Shi Jusheng, Li Ping. FEATUKE EXTRACTION OF HELICOPTER ACOUSTIC SIGNAL BASED ON HARMONIC RETRIEVAL[J]. Journal of Ordnance Engineering College, 1999, 0(2) |
| |
| Authors: | Zhou Zhonglai Shi Jusheng Li Ping |
| |
| Abstract: | Based on analysis of spectral characteristic of helicopter acoustic signal, a method of extracting harmonic frequencies from the helicopter acoustic signal via ESPRIT is proposed. The harmonic frequencies can be used as features to identify helicopter. Meanwhile, ESPRlT is com pared with other methods in perfOrmance of extracting harmonic frequencies. Finally, by using ESPRIT harmonic frequencies are extracted from real measured helicopter acoustic signal. All results demonstrate that ESPRIT is superior to other metheds of extracting harmonic frequencies in operation effect. |
| |
| Keywords: | helicopter acoustic signal harmonic frequencies ESPRIT feature extracTion |
| 本文献已被 CNKI 等数据库收录！ |
