Sharpening technique to decrease comb passband deviation

3rd International Conference on Mathematical Modeling in Physical Sciences

物理学;数学

Dolecek, Gordana Jovanovic^1

Department of Electronics, INAOE, E. Erro 1, Puebla

72740, Mexico^1

关键词: Aliasing;    Decimation filter;    Decrease complexity;    Magnitude characteristic;    Pass bands;    Passband characteristics;    Sampling rates;    Two-stage;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/574/1/012130/pdf
DOI  :  10.1088/1742-6596/574/1/012130

来源: IOP

【 摘 要 】

The decimation filter is necessary to prevent aliasing during the process of decreasing sampling rate, which is called decimation. Due its simplicity, the most popular decimation filter is the comb filter. However, this filter exhibits a high passband droop in the passband magnitude characteristic, which must be avoided to prevent the distortion of the decimated signal. In this paper we present the sharpening technique to improve comb passband characteristic. In order to decrease complexity introduced by sharpening, we also consider two-stage structure where the sharpening is applied only at the second stage. Different examples are included to illustrate the benefits of the proposed method.