哈尔滨工程大学学报2024，Vol.45Issue(7)：1273-1279,7.DOI:10.11990/jheu.202204044
基于非负矩阵分解的双曲调频信号目标回波增强
Target echo enhancement of HFM signals based on non-negative matrix factorization
摘要
Abstract
Hyperbolic frequency modulation(HFM)signals are Doppler-insensitive signals commonly used in active sonar.In practice,target echoes are often weak owing to channel variations and reverberation effects.To address the issue of detection performance degradation in active sonar for underwater vehicles,this paper proposes a target echo enhancement method for HFM signals based on non-negative matrix factorization.This method separately de-fines base matrices for target echo and interference signals.It uses the time-frequency diagram of transmit signals as the frequency information matrix for the target echo and imposes constraints on the time information matrix of the target echo.The enhancement in the target echo is achieved through iterative processing,resulting in a matching echo detection with higher gain.Numerical simulations and sea test results show that the method improves the peak-to-average ratio by more than 2 dB compared with traditional matched filtering methods,thereby enhancing echo de-tection outcomes.关键词
主动声呐/水下探测/混响/噪声/非负矩阵分解/双曲调频信号/回波增强/目标检测Key words
active sonar/underwater detection/reverberation/noise/non-negative matrix factorization/hyperbolic frequency modulation(HFM)signal/echo enhancement/target detection分类
数理科学引用本文复制引用
崔小斌,李淑秋,李宇,李子高,孙飞虎,迟骋,金盛龙,王冠群..基于非负矩阵分解的双曲调频信号目标回波增强[J].哈尔滨工程大学学报,2024,45(7):1273-1279,7.基金项目
国家自然科学基金项目(11904386). （11904386）
