Modulated wideband converter with non-ideal lowpass filters

We investigate the impact of using non-ideal lowpass filters in the modulated wideband (MWC) converter, which is a recent subNyquist sampling system for sparse wideband analog signals. We begin by deriving a perfect reconstruction condition for general lowpass filters, which coincides with the well-known Nyquist intersymbol interference (ISI) criterion in communication theory. Then, we propose to compensate for the non-ideal lowpass filters using a digital FIR correction scheme. The proposed solution is validated by experimental results.

• Type: Conference
• Year: 2010
• Where: ICASSP
• Authors: Yilun Chen, Moshe Mishali, Yonina C. Eldar, Alfred O. Hero III
• Keywords: ICASSP 2010, Modulated Wideband, Non-ideal Lowpass filters, Signal Processing, Sparse Wideband Analog