Robustness of Parallel Multi-Rate A-D Converters to Anti-Aliasing Filter Non-IdealitiesReport as inadecuate




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1 SSE - Département Signaux et Systèmes Electroniques E3S - Supélec Sciences des Systèmes Gif-sur-Yvette

Abstract : Any digitization system must be preceded by an anti-aliasing filter. For wideband high frequency applications, parallel multi-rate conversion systems such as time-interleaved or hybrid filter bank analog-to-digital converters resp. TIADC or HFB are attractive solutions. This paper compares the robustness of both techniques with respect to non-idealities of the anti-aliasing filter AAF. Theoretical results show that the signal-to-noise ratio SNR degradation due to out-of-band signals is lesser for HFBs than for TI-ADCs, provided that the analysis filters of the HFB are selective enough. Simulation results show that this is the case even for low-order analysis filters in the case of a four-channel HFB.





Author: Caroline Lelandais-Perrault - Morgan Roger -

Source: https://hal.archives-ouvertes.fr/



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