Analysis and Signal Recovery of Modulated Wideband Converter with Gain Mismatch

Abstract:

Recently, a sub-Nyquist sampling system, called as Modulated Wideband Converter (MWC), for sparse analog signals is proposed in [1]. In this paper, the gain mismatch, i.e. the gain variation of the mixers, the low pass filters and the low-date rate ADCs, in the MWC is, firstly, analyzed. A gain error matrix defined to model the gain mismatch is, then, proposed to formulate all of these non-idealities of the gains. Based on the gain error matrix, a more accurate signal reconstruction algorithm is presented. Numerical simulation results show that the proposed signal reconstruction algorithm outperforms the reference algorithm in the presence of gain mismatch, while the analytical results are verified.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 2609-2614
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.2609
• Online since: January 2013
• Authors: You Hua Wang, Jian Qiu Zhang
• Keywords: Compressive Sensing, Gain Mismatch, High Speed ADC, Modulated Wideband Converter, Signal Reconstruction

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