基于傅立叶变换的噪声抑制  

作　　者：张新淼 

机构地区：[1]山东科技大学海洋科学与工程学院,山东青岛266590

出　　处：《数码设计》2019年第11期20-21,共2页Peak Data Science

摘　　要：噪声干扰是一种有效的抑制性干扰信号,能干扰任何形式的信号检测。线性调频引信根据回波信号可有效提取目标信号,但噪声干扰的存在影响了引信获取目标信息的能力。为提高线性调频引信抗噪声干扰的能力,根据在一个调频周期内线性调频引信差频信号可近似认为为一单频信号的特点,提出基于快速傅里叶变换的线性调频引信噪声干扰抑制方法,分析了噪声干扰抑制原理,并模拟了噪声干扰抑制效果。Noise interference is an effective suppressive interference signal that can interfere with any form of signal detection.Chirp fuze can effectively extract the target signal based on the echo signal,but the existence of noise interference affects the ability of the fuze to obtain the target information.In order to improve the ability of the chirp fuze to resist noise interference,based on the characteristics of the chirp fuze difference frequency signal in a FM period can be regarded as a single-frequency signal,a method for suppressing the noise interference of the chirp based on the fast Fourier transform is proposed.The principle of noise interference suppression is analyzed,and the effect of noise interference suppression is simulated.

关 键 词：噪声干扰 快速傅里叶变换 信号去噪 

分 类 号：TN913[电子电信—通信与信息系统]