Data Weighted Averaging for Simulink
The SIMULINK- models of multibit Delta-Sigma ADC and Delta-Sigma DAC all have a non-ideal D/A-converter.
The DAC mismatch noise will be shaped according to a general Data Weighted Averaging (DWA) transfer function 1±z^(-D), where D is a positive integer.
The DWA element selection logic calculates a selection vector. The selection vector chooses, which of the unit DACs will be used according to DAC input.
The DWA block is constructed using mainly fixed-point blocks.
Models for Incremental DWA (IDWA) were also added.
This package also includes a spurious tone estimator: the spurs can be estimated using the DS input signal and the DNL error shape.
Cite As
Marko Neitola (2021). Data Weighted Averaging for Simulink (https://www.mathworks.com/matlabcentral/fileexchange/23079-data-weighted-averaging-for-simulink), MATLAB Central File Exchange. Retrieved .
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Acknowledgements
Inspired by: Delta Sigma Toolbox, Modulo Time Plot
Inspired: Quadrature Data Weighted Averaging, Multibit CT DS ADC with DWA and ISI-Mitigation
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Thank you so much for sharing the valuable material
This model and the related paper (mentioned previously) were also a part of my Ph.D. thesis:
http://herkules.oulu.fi/isbn9789514297496/isbn9789514297496.pdf
The mismatch noise estimator was improved ad added to submission #29522: "Delta Sigma converter spurious tone predictor".
Both DWA mismatch noise model and DSM quantization noise models can be found in #29522.
More information about this model:
Neitola, M., Rahkonen, T.: A Generalized Data-Weighted Averaging Algorithm. Circuits and Systems II: Express Briefs, IEEE Transactions on, Volume: 57 , Issue: 2, Publication Year: 2010 , Page(s): 115 - 119
Available on IEEE Xplore