Signal real-time processing device

Abstract

The invention provides a signal real-time processing device. The signal real-time processing device comprises a signal conditioning unit, an analog-digital conversion unit, a signal processing unit and an interface communication unit, wherein the signal conditioning unit is used for performing amplification and filtration on a to-be-processed analog signal and outputting the analog signal to the analog-digital conversion unit; the analog-digital conversion unit is used for converting the analog signal processed by the signal conditioning unit into a serial digital signal and outputting the serial digital signal to the signal processing unit; the signal processing unit comprises a decomposition and reconstruction subunit, and the decomposition and reconstruction subunit comprises a causal filter and is used for performing decomposition and reconstruction processing on the serial digital signal in sequence while outputting the serial digital signal by the analog-digital conversion unit to eliminate noise in the serial digital signal in real time and outputting a processing result to the interface communication unit; the interface communication unit is used for transmitting the processing result output by the signal processing unit to an upper computer. The signal real-time processing device can be used for processing the digital signal in real time at a high speed.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a signal real-time processing device. Background technique [0002] At present, signal acquisition and processing technology has been widely used in various industrial technical fields such as communication, image, voice, and electronics. Among them, the real-time processing technology of digital signal is essential for any digital system. [0003] The basic principle of signal acquisition and processing technology is: first collect electrical signals (i.e. analog signals) from the outside world, because the collected electrical signals are generally very weak, and at the same time mixed with noise and power frequency interference, resulting in electrical signal distortion, so the collected The electrical signal must be processed before A / D conversion can be performed, and then the A / D conversion result is sent to a general-purpose microprocessor (such as an existing s...

AI Technical Summary

Problems solved by technology

However, Fourier transform technology has the following disadvantages: it needs to obtain the processing results of digital signals after all the analog signals are collected, which cannot meet the real-time processing requirements of digital signals, especially in some In some occasions, it is often expected that the signal processing can only have a small delay, and the Fourier transform technology obviously cannot meet the high real-time processing requirements.

[0006] However, the existing wavelet transform technology has a complex dependence on data and a large amount of calculation. It often cannot meet the requirements in some occasions that need to realize high-speed real-time processing of digital signals. The reasons are as follows: the existing wavelet decomposition and reconstruction mostly use It is implemented by a general-purpose microprocessor such as a single-chip microcomputer or DSP, but the work flow of the general-purpose microprocessor is executed in accordance with the order of the established instruction stream, and the calculation amount is relatively large when the signal is decomposed and reconstructed by multi-layer wavelet, which makes the existing wavelet transform technology In many cases, it cannot meet the high-speed real-time processing requirements of digital signals, thus restricting its application in the field of high-speed real-time signal processing

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