An Efficient Way of Obtaining Formulas of Narrowband FIR Digital Filters Based on Sinc Sum Function
A new approach is put forward for obtaining formulas of narrowband lowpass FIR digital filters(NLFDFs) with linear phase based on sinc sum function. Five NLFDF formulas are deduced as examples with stopband attenuation from 47dB to 90db and corresponding relations between filter order and transition width are given. Filter orders designed using four formulas are at least 8.2℅ smaller than the ones designed using Kaiser window with same stopband attenuation and same transition width and using the remaining formula even 27℅ smaller. For the design of filters calculation using Kaiser window is incomparable with the calculation of these formulas because the later is not more difficult than calculation using fixed window. In addition, by the same steps as the examples much more NLFDF formulas can be obtained with different stopband attenuation and good performances.
Filter FIR Bandpass Narrowband Sinc sum
Wang Yunlong
Department of Electronic Information Engineering, Huaiyin Institute of Technology, Huaian 223002, Jiangsu, P. R. China
国际会议
北京
英文
1566-1571
2009-08-08（万方平台首次上网日期，不代表论文的发表时间）