Scalable blind calibration of timing skew in high-resolution time-interleaved ADCs

The performance of high-resolution time-interleaved analog-to-digital converters is often significantly degraded by timing mismatch errors. This paper examines low-complexity methods for performing blind calibration of such converters. In particular, we develop a least squares formulation for estimating the unknown time-skew parameters and for performing signal reconstruction from these estimates. The complexity of the proposed algorithm scales linearly with the number of converters, making it an attractive solution for calibration. Tradeoffs between performance and complexity are also developed