Co-Simulation for Systematic and Statistical Correction of Multi-Digital-to-Analog-Convertor Systems
| Autor: | Youngcheol Park, Hoijin Yoon |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Signal generator
Computer science Quantization (signal processing) 020208 electrical & electronic engineering Digital-to-analog converter 020206 networking & telecommunications 02 engineering and technology Kalman filter Arbitrary waveform generator law.invention QAM law 0202 electrical engineering electronic engineering information engineering Electronic engineering Wideband Jitter |
| Zdroj: | Journal of electromagnetic engineering and science. 17:39-43 |
| ISSN: | 2234-8409 |
| DOI: | 10.5515/jkiees.2017.17.1.39 |
| Popis: | In this paper, a systematic and statistical calibration technique was implemented to calibrate a high-speed signal converting system containing multiple digital-to-analog converters (DACs). The systematic error (especially the imbalance between DACs) in the current combining network of the multi-DAC system was modeled and corrected by calculating the path coefficients for individual DACs with wideband reference signals. Furthermore, by applying a Kalman filter to suppress noise from quantization and clock jitter, accurate coefficients with minimum noise were identified. For correcting an arbitrary waveform generator with two DACs, a co-simulation platform was implemented to estimate the system degradation and its corrected performance. Simulation results showed that after correction with 4.8 Gbps QAM signal, the signal-to-noise-ratio improved by approximately 4.5 dB and the error-vector-magnitude improved from 4.1% to 1.12% over 0.96 GHz bandwidth. |
| Databáze: | OpenAIRE |
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