摘要
为在精确控制陷波频率点的前提下尽可能降低陷波器的硬件成本,提出了将全相位滤波技术与频率响应屏蔽技术相结合的陷波器设计算法。该算法将相移措施引入到单窗全相位陷波器设计中,只需根据所推导出的原型滤波器阶数N、内插因子M、陷波整数频点位置m和相移参数λ的数值关系,即可构造出简单实用的新型陷波结构。理论和仿真实验表明,新型设计算法既保证了陷波器在精确频点具有足够大的衰减,又节省了成本,提高了陷波效率。
To reduce the hardware cost of notch filter with the notch frequency point accurately controlled as far as possible, a novel notch filter design algorithm combining the techniques of all-phase filtering and frequency response masking （FRM） is presented. Based on introducing phase-shift measure into the design of allphase notch filter with single window, and deducing the numerical relation between the order N of the prototype filter, the interpolation factor M, the integer position rn of notch frequency and the phase-shift parameter 3,, one novel simple and practical notch filtering structure can be constructed. Both theoretical and simulation experiments show that this novel design algorithm not only guarantees that the notch filter has sufficient attenuation at the accurate frequency point, but also reduces the cost and enhances the notch filtering efficiency.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2009年第10期2320-2322,2454,共4页
Systems Engineering and Electronics
基金
国家自然科学基金(60802048)
高等学校博士学科点专项科研基金新教师基金(200700056105)资助课题
关键词
信息处理技术
陷波器设计
频率响应屏蔽
全相位
相移
information processing technique
notch filter design
frequency response masking
all-phase phase-shift
