Invention Grant
- Patent Title: Method and system for time interleaved analog-to-digital converter timing mismatch estimation and compensation
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Application No.: US15812365Application Date: 2017-11-14
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Publication No.: US10097193B2Publication Date: 2018-10-09
- Inventor: Pawandeep Taluja , Mingrui Zhu , Xuefeng Chen , Anand Anandakumar , Sheng Ye , Timothy Gallagher
- Applicant: Maxlinear, Inc.
- Applicant Address: US CA Carlsbad
- Assignee: Maxlinear, Inc.
- Current Assignee: Maxlinear, Inc.
- Current Assignee Address: US CA Carlsbad
- Agency: McAndrews, Held & Malloy
- Main IPC: H03M1/06
- IPC: H03M1/06 ; H04W56/00 ; H03M1/50 ; H03M1/12 ; H03M1/10

Abstract:
Methods and systems for time interleaved analog-to-digital converter timing mismatch calibration and compensation may include receiving an analog signal on a chip, converting the analog signal to a digital signal utilizing a time interleaved analog-to-digital-converter (ADC), and reducing a blocker signal that is generated by timing offsets in the time interleaved ADC by estimating complex coupling coefficients between a desired digital output signal and the blocker signal utilizing a decorrelation algorithm on frequencies within a desired frequency bandwidth. The decorrelation algorithm may comprise a symmetric adaptive decorrelation algorithm. The received analog signal may be generated by a calibration tone generator on the chip. An aliased signal may be summed with an output signal from a multiplier. The complex coupling coefficients may be determined utilizing the decorrelation algorithm on the summed signals. A multiplier may be configured to cancel the blocker signal utilizing the determined complex coupling coefficients.
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