Comparison of multiplierless implementation of nonlinear-phase versus linear-phase FIR filters. - Muhammad Abbas; Fahad Qureshi; Zaka Ullah Sheikh; Oscar Gustafsson; Håkan Johansson; Kenny Johansson (ACSCC, 2008)

Wideband Linear-phase FIR Differentiators Utilizing Multirate and Frequency-response Masking Techniques. - Zaka Ullah Sheikh; Håkan Johansson (ISCAS, 2009)

Design of narrow-band and wide-band frequency-response masking filters using sparse non-periodic sub-filters. - Zaka Ullah Sheikh; Oscar Gustafsson (EUSIPCO, 2010)

Linear-phase FIR digital differentiator order estimation. - Zaka Ullah Sheikh; Amir Eghbali; Håkan Johansson (ECCTD, 2011)

A Class of Wide-Band Linear-Phase FIR Differentiators Using a Two-Rate Approach and the Frequency-Response Masking Technique. - Zaka Ullah Sheikh; Håkan Johansson (IEEE Trans. Circuits Syst. I Regul. Pap., 2011)

Linear Programming Design of Coefficient Decimation FIR Filters. - Zaka Ullah Sheikh; Oscar Gustafsson (IEEE Trans. Circuits Syst. II Express Briefs, 2012)

A Technique for Efficient Realization of Wide-Band FIR LTI Systems. - Zaka Ullah Sheikh; Håkan Johansson (IEEE Trans. Signal Process., 2012)

Efficient Wide-Band FIR LTI Systems Derived Via Multi-Rate Techniques and Sparse Bandpass Filters. - Zaka Ullah Sheikh; Håkan Johansson (IEEE Trans. Signal Process., 2012)