New Efficient Hybrid Window for Digital FIR Filter Design Enhancement

In this work, we introduce a new hybrid window to mitigate spectrum leakage as well as to enhance FIR filter design thereby reducing the pass band ripples level. We have, therefore, truncated the infinite impulse response (IIR) of a band pass digital filter by the two commonly used windows; Hamming, Hanning, and by the proposed hybrid window in order to obtain a finite impulse response (FIR), and then compared the obtained frequency responses. The results obtained with this hybrid window, show that the pass band spectrum leakage is clearly more mitigated than those obtained with the other two windows. Furthermore, we have shown the performance of this window in controlling the resolution when used as sliding window in the time-frequency analysis. We believe that this hybrid window has a great potential not only to enhance the FIR filter design but to mitigate the Welch’s power spectral density leakage as well.