- Title
- Linear LMS compensation for timing mismatch in time-interleaved ADCs
- Creator
- Marelli, Damian; Mahata, Kaushik; Fu, Minyue
- Relation
- IEEE Transactions on Circuits and Systems I-Regular Papers Vol. 56, Issue 11, p. 2476-2486
- Publisher Link
- http://dx.doi.org/10.1109/tcsi.2009.2015730
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- journal article
- Date
- 2009
- Description
- The time-interleaved architecture permits the implementation of high-frequency analog-to-digital converters (ADCs) by multiplexing the output of several time-shifted low-frequency ADCs. An issue in the design of a time-interleaved ADC is the compensation of timing mismatch, which is the difference between the ideal and real sampling instants. In this paper, we propose a compensation method that, as opposite to existing approaches, does not assume that the input signal is band limited but assumes instead that it has a stationary known power spectrum. The compensation is then designed in a statistically optimal sense. This largely reduces the compensation order required to achieve a given reconstruction accuracy. Also, under the band-limited assumption, the proposed method achieves perfect reconstruction if no constraints are imposed on the order of the compensation. Simulation results show that a rough estimate of the input spectrum can be used without much performance loss, showing that an accurate knowledge of the input spectrum is not necessarily required.
- Subject
- analog digital conversion; compensation; least mean squares; multirate digital filters
- Identifier
- uon:7451
- Identifier
- http://hdl.handle.net/1959.13/807640
- Identifier
- ISSN:1549-8328
- Rights
- Copyright © 2009 IEEE. Reprinted from IEEE Transactions on Circuits and Systems I-Regular Papers. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Newcastle's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
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