CAJ | 학술논문

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∈[0．1325／σ，0．265／σ]，t∈[－4σ，4σ]。
침대수자신호처리중적려파기설계문제，급출료일충수자려파기설계방법，즉이용복조제화선성조합장다개구유불동중심빈솔적고사함수시역진행첩가。연구결과표명：소설계려파기적성능주요취결우조합복조제고사함수적형상삼수σ、빈이Δf화시간장도 t，통상취σ∈[0．1，1]，Δf∈[0．1325／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].