Digital compensation of lowpass filters imperfection in the Modulated Wideband Converter compressed sensing scheme for radio frequency monitoring - Université de Bretagne Occidentale Access content directly
Journal Articles Signal Processing Year : 2018

Digital compensation of lowpass filters imperfection in the Modulated Wideband Converter compressed sensing scheme for radio frequency monitoring

Roland Gautier
Anthony Fiche
Gilles Burel
Emanuel Radoi

Abstract

This paper focuses on non-ideal filters in a Modulated Wideband Converter (MWC) scheme. The MWC is a system that can sample a sparse wideband signal at sub-Nyquist rate. Generally, the output of the ideal MWC components will ensure a perfect reconstruction. In practice, the reconstruction should be based on the output of non-ideal components, especially filters. The impact of non-ideal filters will trigger to a bad reconstruction. In this paper, a detailed study on non-ideal lowpass filters imperfection used in compressed sensing MWC scheme is synthesized. A digital post-treatment scheme with amplitude and phase compensation is proposed after real lowpass filtering step in order to have the filtered output as close as the ideal lowpass filter output. At last, reconstruction spectra obtained from different simulated lowpass filters are compared with different parameters of MWC.

Dates and versions

hal-01822883 , version 1 (25-06-2018)

Identifiers

Cite

Lap-Luat Nguyen, Roland Gautier, Anthony Fiche, Gilles Burel, Emanuel Radoi. Digital compensation of lowpass filters imperfection in the Modulated Wideband Converter compressed sensing scheme for radio frequency monitoring. Signal Processing, 2018, 152, pp.292 - 310. ⟨10.1016/j.sigpro.2018.06.011⟩. ⟨hal-01822883⟩
186 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More