【摘要】 线性调频信号(LMFS)是雷达回波信号的一种常见形式,Wigner-Hough变换(WHT)常用于LMFS的检测。复杂环境下雷达回波中的尖峰脉冲噪声服从α稳定分布,在这种噪声环境下WHT性能退化。基于此提出了能工作在稳定分布噪声环境下的分数低阶伪Wigner-Ville时频分布方法(FLO-PWVD),结合已有的Hough变换,提出了分数低阶伪Wigner-Hough变换(FLO-PWHT)新方法。在脉冲噪声环境下,应用FLO-PWHT对多个LMFS信号进行检测,计算机仿真结果表明,提出的FLO-PWHT算法性能明显优于已有的PWHT方法,能较好地在脉冲噪声环境下工作,且具有一定的韧性。更多还原

【Abstract】 The linear frequency-modulation signal(LMFS) is a common form of radar echo signal,and the Wigner-Hough transform(WHT)is commonly used to detect the LMFS. The spike impulse noise in radar echo follows α stable distribution in complex environment,but the performance of the WHT will degenerate in this noise environment. The fractional lower- order pseudo Wigner-Ville time-frequency distribution(FLO-PWVD)method is proposed in this paper,which can work in stable distribution noise environment. The new method of fractional lower- order pseudo Wigner- Hough transform(FLO- PWHT) is proposed based on Hough transform. The FLO-PWHT method was adopted to detect the multiple LMFSs in impulse noise environment. The computer simulation results show that the proposed FLO- PWHT method has better performance than the existing PWHT method,it can work better in the impulse noise environment,and has a certain tenacity.更多还原