Phase extraction based efficient timing mismatch identification in time-interleaved analogue-to-digital converter systems

An efficient timing mismatch identification technique based on phase extraction for M-channel time-interleaved analogue-to-digital converters is presented. Identification using a test tone with frequency up to the system Nyquist band in a reduced frequency domain computation is described. It is demonstrated that the proposed technique is computationally efficient and can accurately estimate timing mismatch errors.