Optimal Design of Hybrid Filterbank Analog-to-Digital Converters using Input Statistics

DAMIÁN MARELLI; KAUSHIK MAHATA; MINYUE FU

Taipei

Conferencia; IEEE Conference on on Acoustics, Speech, and Signal Processing (ICASSP); 2009

Institute of Electrical and Electronics Engineers (IEEE)

The hybrid filterbank architecture permits imple-menting accurate, high speed analog-to-digital converters. How-ever, its design is technically involved since perfect reconstructionof the desired samples cannot be achieved in general. In thispaper we propose a design method which generalizes existingapproaches by dropping the bandlimited assumption on the inputsignal. The design minimizes the power of the reconstructionerror in the samples, for a given input signal power spectrum.We discuss the use of blind techniques to estimate the analysisfilterbank parameters as well as the input power spectrum, andwe present simulation results to demonstrate the clear advantageof the proposed design, even under input spectrum uncertainties.