摘要
针对数字信号处理中的滤波器设计问题,给出了一种数字滤波器设计方法,即利用复调制和线性组合将多个具有不同中心频率的高斯函数时域进行叠加。研究结果表明:所设计滤波器的性能主要取决于组合复调制高斯函数的形状参数σ、频移Δf和时间长度t,通常取σ∈[0.1,1],Δf∈[0.132 5/σ,0.265/σ],t∈[-4σ,4σ]。
In view of the problem of filter design in digital signal processing,a method of digital filter de-sign is presented in this paper by using complex modulation and linear combination to superpose the multi-Gaussian function with different center frequency in time domain.The result shows that the de-signed filter’s performance rests with the shape parameter σ,frequency-shifting Δfand time length t,u-sually to take as a choice ofσ∈[0.1 ,1 ],Δf∈[0.1 32 5/σ,0.265/σ],t∈ [-4σ,4σ].
出处
《装甲兵工程学院学报》
2014年第5期57-60,共4页
Journal of Academy of Armored Force Engineering
关键词
信号处理
数字滤波器设计
高斯函数
复调制
signal processing
digital filter design
Gaussian function
complex modulation
