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A signal processing method and system

A signal processing and analog signal technology, applied in the field of signal processing, can solve the problem of low signal SNR, and achieve the effect of improving the quantized signal-to-noise ratio

Active Publication Date: 2020-07-28
NANJING ZGMICRO CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The embodiment of the present application provides a signal processing method and system for solving the problem of low SNR of the signal after quantization in the prior art

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  • A signal processing method and system
  • A signal processing method and system
  • A signal processing method and system

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Embodiment 1

[0025] figure 1 A block diagram of a signal processing system according to Embodiment 1 of the present application is shown. The signal processing system according to Embodiment 1 of the present application is an ADC implementation system. The implementation system is based on the common Sigma-Delta ADC structure, adding a mechanism to dynamically adjust the PGA (programmer gain amplifier) ​​gain based on the signal amplitude.

[0026] like figure 1 As shown, the ADC implementation system 100 according to Embodiment 1 of the present application includes the following functional units: an analog signal amplitude detection subunit 101, a digital volume detection subunit 102, a gain calculation unit 103, an analog signal amplification unit 104, and an ADC simulation unit 105, ADC digital unit 106 , digital gain attenuation unit 107 , and delay unit 108 .

[0027] Specifically, the functional description of each functional unit is as follows:

[0028] The analog signal amplitu...

Embodiment 2

[0073] Figure 4 A block diagram of a signal processing system according to Embodiment 2 of the present application is shown. The signal processing system according to Embodiment 2 of the present application is a DAC implementation system. The implementation system is based on the common Sigma-Delta DAC structure, adding a mechanism to dynamically adjust the PA (Power amplifier) ​​gain based on the signal amplitude.

[0074] like Figure 4 As shown, the DAC implementation system 400 according to Embodiment 2 of the present application includes the following functional units: a digital volume detection unit 401, a digital gain amplification unit 402, a DAC digital unit 403, a DAC analog unit 404, an analog signal amplification unit 405, and a delay unit 406 .

[0075] Specifically, the functional description of each functional unit is as follows:

[0076] The digital volume detection unit 401 is used to count the amplitude value of the input digital signal within a predeter...

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Abstract

The embodiment of the invention provides a signal processing method and system. The method comprises the following steps: a detection unit detects the amplitude of a processing signal, and a gain calculation unit determines a first gain according to the amplitude of the processing signal, wherein the processing signal comprises an input analog signal, and / or a digital signal output within a previous preset time length; an analog signal amplification unit amplifies the analog signal for the first gain; an ADC analog unit performs analog-to-digital conversion on the amplified analog signal to obtain a digital signal; an ADC digital unit encodes the digital signal to obtain a plurality of samples, and increases data used for identifying the magnitudes of the first gains corresponding to the samples to predetermined positions of the encoded samples; and a digital gain attenuation unit attenuates the samples according to the magnitudes of the first gains corresponding to the samples and outputs an attenuated digital signal. By adoption of the scheme in the embodiment of the invention, the quantized signal to noise ratio of the input signal can be improved.

Description

technical field [0001] The present application relates to the field of signal processing, and in particular, to a signal processing method and system. Background technique [0002] With the development of signal digitization, because digital signals such as digital audio signals are more convenient in transmission, stronger in anti-interference, more reliable, faster in processing speed and higher in precision, it is often necessary to convert analog signals into Digital signals are transmitted and processed. In the prior art, the process of converting an analog signal into a digital signal is very simple. Generally, an analog-to-digital converter (ADC, Analog-to-Digital Converter) is directly used to perform analog-to-digital conversion on an input analog signal and output a digital signal. Continue processing. However, in the process of converting an analog signal into a digital signal through an ADC, quantization noise is usually introduced, and the signal-to-noise rati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/08H03M1/18
CPCH03M1/08H03M1/18
Inventor 冯宇红吴杰刘瑜瑜熊焱
Owner NANJING ZGMICRO CO LTD
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