摘要
谐波恢复是信号处理中的重要问题,谐波恢复就是在噪声中分析组成信号的各次谐波。噪声分为加性噪声和乘性噪声,本文分析加性噪声和乘性噪声的特点,提出采用高阶统计量的方法抑制噪声,恢复谐波。通过四阶统计量的切片抑制乘性噪声,采用二阶累积量谱抑制加性噪声。仿真结果表明,本方法具有很好的抑制噪声效果。
Harmonic retrieval is an important problem of signal processing.Harmonic retrieval is various order harmonic which make up of signal in noise.Noise can be classified as additive noise and multiplicative noise.This paper analyses the characteristics of additive noise and multiplicative noise,and proposes using high-order statistics to restrain noise and to retrieve harmonic.Uses the slice of four order statistics to restrain multiplicative noise and two order cumulative spectrum to restrain additive noise.The simulation results show this way has very good effect of restraining noise.
出处
《计算机与现代化》
2011年第6期100-102,共3页
Computer and Modernization
基金
国家自然科学基金资助项目(50977093)
关键词
谐波恢复
高阶统计量
噪声
harmonic wave retrieval
high-order statistics
noise
