Quantized Sampling Noise Reduction Method

Abstract

In the quantized sampling noise reduction method, the quantized noise reduction system performs noise reduction processing on the quantized sampled data, and the quantized noise reduction system includes a digital processor, an analog-to-digital converter and a digital-to-analog converter; The noise generation unit of the noise sequence; the noise data generated by the noise generation unit is output to the digital-to-analog converter one way, and the digital-to-analog converter data and the analog signal source data are subjected to analog operations and then transmitted to the digital processor through the analog-to-digital converter; the other output To the digital processor, after performing digital operations with the data transferred from the analog-to-digital converter to the digital processor, it is used for subsequent processing. Different from the traditional method, the present invention introduces the noise data into the front end and the back end of the analog-to-digital converter (sampled data) respectively, and adopts superposition and XOR processing respectively, which is equivalent to double noise reduction processing on the sampled data, which can greatly improve Accuracy of data noise reduction processing.

Description

technical field [0001] The invention belongs to the technical field of sampling data processing, and relates to a data noise reduction method, in particular to a noise reduction method for quantization sampling data applied to a quantization sampling system. Background technique [0002] Quantization noise exists in the sampled data of quantized sampling systems. [0003] Taking the data acquisition of the near-surface FDEM observation system (near-surface frequency-domain electromagnetic observation system) as an example, the data collected by this type of system contains quantization noise. Since the quantization noise of this observation system is a special kind of noise, it is caused by the quantization sampling of the analog-to-digital conversion device (ADC) during data acquisition, so no matter how filtering is used, this problem cannot be solved well. In the prior art, few people have studied the problem of reducing the quantization noise of the quantization samplin...

AI Technical Summary

Problems solved by technology

Since the quantization noise of this observation system is a special kind of noise, it is caused by the quantization sampling of the analog-to-digital conversion device (ADC) during data acquisition, so no matter how filtering is used, this problem cannot be solved well. In the existing technology, few people have studied the problem of reducing the quantization noise of the quantization sampling system

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