The application research on improvement of constant sinusoidal signal sampling precision based on adaptive filter |
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| Authors: | YIN Gang a SI Rui qi and LI Chang ming |
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| Institution: | State Key Laboratory of Coal Mine Disaster Dynamics and Control;Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044, P.R.China;College of Electrical Engineering, Chongqing University, Chongqing 400044, P.R.China;College of Electrical Engineering, Chongqing University, Chongqing 400044, P.R.China |
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| Abstract: | A novel scheme is present to improve the conversion accuracy of ADC. The proposed approach uses adaptive sinusoidal filter. For the measurement of the signal with given frequency, the automatic adjustment of filter coefficients is based on least mean-square error rule, which is a mathematical tool can be employed to make filter output signal achieve the best approximation to the needed one. Then based on the result, it is able to get the amplitude and phase of the measured signal accurately. MATLAB software is used to verify the effectiveness of the algorithm. It proves that adaptive filter has improved the accuracy and signal-to-noise ratio of ADC, which is equal to increase the conversion digits. |
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| Keywords: | adaptive algorithms filter ADC mean square error |
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