A digital bandwidth interleaved structure correction method based on itemized correction.

Abstract

To satisfy the input bandwidth and sampling rate requirements of data acquisition systems, digital bandwidth-interleaved analog-to-digital converters (DBI-ADCs) offer a practical parallel structure. However, the existing DBI-ADC correction methods are broadly inadequate in terms of design, testing, and implementation. Moreover, the evaluation and correction of the most significant feature of the DBI-ADC structure-wideband acquisition performance-is also imperfect. This paper proposes an itemized correction method for DBI-ADC structures. The proposed method simplifies the complex correction filter bank designalgorithm into multiple simple correction filters and then separates and corrects the various errors of the DBI-ADC system. This dramatically simplifies the design, testing, and implementation process of the system, resulting in a highly convenient method for practical engineering. In addition, this method achieves a good correction effect, with an appropriate balance between the correction effect and the project implementation. Simulation results and experimental results verify the effectiveness of the proposed method.