Wide-band, band-pass and versatile Hybrid Filter Bank A/D conversion for software radio

Caroline Lelandais-Perrault (1) , Tudor Petrescu (1) , Daniel Poulton (1) , Pierre Duhamel (2) , Jacques Oksman (1)

1 E3S - Supélec Sciences des Systèmes
2 L2S - Laboratoire des signaux et systèmes

This paper deals with analog-to-digital (A/D) conversion for future software/cognitive radio systems. For these applications, A/D converters should convert wideband signals and offer high resolutions. In order to achieve this and to overcome technological limitations, the A/D conversion systems should be versatile, i.e. it should be possible to adapt the conversion characteristics (resolution and bandwidth) by software. This work studies and adapts Hybrid Filter Banks (HFBs) in this context. First, HFBs, which can provide large conversion bandwidth, are extended to band-pass sampling, thus minimizing the sampling frequency. Then, we provide efficient ways of improving the HFB resolution in a smaller frequency band, only by reprogramming the digital part. Moreover, this study takes into account the main drawback of HFBs which is their very high sensitivity to analog imperfections. Simulation results are presented to demonstrate the performance of HFBs.

Mots clés: Analog-to-digital conversion; hybrid filter banks; wide-band; band-pass; versatility; software radio; cognitive radio.; cognitive radio

Domaines: Electronique; Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Caroline Lelandais-Perrault, Tudor Petrescu, Daniel Poulton, Pierre Duhamel, Jacques Oksman. Wide-band, band-pass and versatile Hybrid Filter Bank A/D conversion for software radio. IEEE Circuits and Devices Magazine, 2009, 56 (8), pp.1772-1782. ⟨hal-00424380⟩