Improved space time prewhitener for linear frequency modulation reverberation using fractional Fourier transform |
| |
| Authors: | Wang Ruhang Huang Jianguo Ma Tian Zhang Qunfei |
| |
| Affiliation: | College of Marine Engineering, Northwestern Polytechnical University, Xi'an 710072, China. wangruhang@mail.nwpu.edu.cn |
| |
| Abstract: | This letter presents an improved space time prewhitening method for linear frequency modulation (LFM) reverberation. The proposed method transforms the reverberation to fractional Fourier domain to whiten using fractional Fourier transform. The linear varying frequency in LFM reverberation is focused on a stationary frequency, and the adjacent block signal is used as the reference signal of prewhitening. Finally, experiment results with real reverberation data verify that the proposed method improves the detection performance of active sonar in shallow sea significantly. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
