A class of reconfigurable and low-complexity two-stage Nyquist filters

Authors:
Amir Eghbali;Håkan Johansson
Affiliations:
-;-
Venue:
Signal Processing
Year:
2014

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Abstract

This paper introduces a class of reconfigurable two-stage Nyquist filters where the Farrow structure realizes the polyphase components of linear-phase finite-length impulse response (FIR) filters. By adjusting the variable predetermined multipliers of the Farrow structure, various linear-phase FIR Nyquist filters and integer interpolation/decimation structures are obtained, online. However, the filter design problem is solved only once, offline. Design examples, based on the reweighted @?"1-norm minimization, illustrate the proposed method. Savings in the arithmetic complexity are obtained when compared to the reconfigurable single-stage structures.