Paper Info
Title
An Efficient Blind Calibration Method For Nonlinearity Mismatches In M-Channel Tiadcs
Abstract
As gain, offset, and timing mismatches, nonlinearity mismatches also contribute to spurious components which deteriorate TIADC's performance. This paper proposes an efficient blind calibration method for nonlinearity mismatches in M-channel TIADCs. A modified model for nonlinearity mismatches is established by exploiting binary Hadamard transform (BHT) and differentiator. The calibration is composed of two stagesmismatches compensation and coefficients identification. The principle of mismatches compensation is to reconstruct estimations of the mismatchesinduced spurious components and subtract them from the original TIADC's output. The coefficients identification is performed based on filtered-x least mean square (FxLMS) algorithm. By using improved model and calibration algorithm, the proposed method consumes less computational resource according to the complexity comparison. To tackle the 4-order nonlinearity mismatches in an 16-channel TIADC, the proposed method consumes 23% fewer multipliers than the previous work. Simulation results reveal that both effective resolution and dynamic range improve a lot after calibration.
Year
DOI
Venue
2017
10.1587/elex.14.20170468
IEICE ELECTRONICS EXPRESS
Keywords
Field
DocType
TIADC, frequency-dependent nonlinearity mismatches, binary Hadamard transform, filtered-x least mean square, differentiator
Nonlinear system,Computer science,Differentiator,Communication channel,Electronic engineering,Calibration
Journal
Volume
Issue
ISSN
14
11
1349-2543
Citations 
PageRank 
References 
3
0.42
10
Authors
4
Name
Order
Citations
PageRank
Xiangyu Liu15114.10
Hui Xu2127.67
Husheng Liu364.20
Yinan Wang4279.85