What is it about?
Besides the consideration of the frequency-response mismatch and aliasing error associated with sampling, the autocorrelation matrix of magnitude response is introduced to evaluate the performance of overlapping cancelation between the nearby subbands.
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Why is it important?
a) It enhances the sample-rate and bandwidth of the A/D converters proportionally with the number of channels; b) It offers fine overlapping attenuation and mismatch compensation, thus improving the SNR of the converters; c) It allows utilizing low order analog filters for subband decomposition, thus making the bandwidth-interleaved architecture promising for integration into a chip.
Perspectives
The suggested frequency-response model of BI-ADC allows moving the spectrum of the analog subchannel to the particular band where the subband signal is located, instead of transiting the signal back and forth, thus simplifying the design of reconstruction filters.
Dr. Jinpeng Song
University of Electronic Science and Technology of China
Read the Original
This page is a summary of: Digital correction of frequency-response errors in bandwidth-interleaved ADCs, Electronics Letters, September 2016, the Institution of Engineering and Technology (the IET),
DOI: 10.1049/el.2016.2433.
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