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Signal Reconstruction Method of Multi-channel Parallel Signal Acquisition System Based on Comparator

A signal acquisition system and signal reconstruction technology, applied in the direction of analog-to-digital converters, etc., can solve the problems of low noise resistance of the acquisition system, slow system running speed, high information transmission and storage pressure, etc., to save storage space, use The effect of improving efficiency and reducing hardware pressure

Active Publication Date: 2016-08-10
严格集团股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the sampling frequency of the existing multi-band information acquisition system is limited by the ADC quantizer, the pressure on information transmission and storage is high, resulting in slow system operation speed, and at the same time, the problem of low noise resistance of the acquisition system due to the restriction of the acquisition method , provides a signal reconstruction method based on a comparator-based multi-channel parallel signal acquisition system

Method used

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  • Signal Reconstruction Method of Multi-channel Parallel Signal Acquisition System Based on Comparator
  • Signal Reconstruction Method of Multi-channel Parallel Signal Acquisition System Based on Comparator
  • Signal Reconstruction Method of Multi-channel Parallel Signal Acquisition System Based on Comparator

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specific Embodiment approach 1

[0024] Specific implementation mode 1. Combination image 3 Illustrate this specific embodiment, the multi-channel parallel signal acquisition system based on comparator, it comprises analog multiplier, low-pass filter and sampler, the multiplication signal input end of analog multiplier is the input end of multi-band sparse signal, analog multiplication The multiplication signal output end of the device is connected with the filter signal input end of the low-pass filter, and the filter signal output end of the low-pass filter is connected with the sampling signal input end of the sampler;

[0025] It also includes a comparator, the sampling signal output terminal of the sampler is connected with the comparison signal input terminal of the comparator, and the comparison signal output terminal of the comparator is used as the signal output terminal of the multi-channel parallel signal acquisition system based on the comparator.

[0026] In this embodiment, by using the compara...

specific Embodiment approach 2

[0027] Specific embodiment two, combine image 3 Describe this embodiment, the difference between this embodiment and the acquisition method of the comparator-based multi-channel parallel signal acquisition system described in Embodiment 1 is that it is realized by the following steps:

[0028] Step 1, performing serial / parallel conversion on the multi-band sparse signal x(t) to obtain m parallel multi-band sparse signal x(t); m is a positive integer greater than 2;

[0029] Step 2. Combine each multi-band sparse signal x(t) with a periodic signal p i (t) Perform multiplication processing through an analog multiplier, i=1, 2,,, m, m is a positive integer greater than 2, and a total of m signals x are obtained i (t), i.e. x i (t)=x(t)p i (t);

[0030] Step 3, the m signal x obtained in step 2 i (t) Low-pass filtering is performed respectively by using a low-pass filter to obtain m-channel low-pass filtered signals;

[0031] Step 4. Perform frequency-domain windowing on th...

specific Embodiment approach 3

[0034] Specific Embodiment 3. The difference between this embodiment and the acquisition method of the comparator-based multi-channel parallel signal acquisition system described in Specific Embodiment 2 is that the digital signal y described in step 5 i [n] is carried out Fourier transformation, obtains:

[0035] Y i ( e j 2 πfT s ) = Σ n = - ∞ ∞ y ...

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Abstract

A comparator-based acquisition system and method for multiple parallel signals and a signal reconstruction method relate to the field of multiband signal acquisition and solve the problems that the system running speed is low due to high information transmission and storage pressure because the sampling frequency of a conventional multiband information acquisition system is restricted by an ADC quantizer, and the noise resistance of the acquisition system is low due to restriction of the acquisition method. The acquisition system comprises an analog multiplier, a low-pass filter, a comparator and a sampler, wherein a multiband signal is processed by the low-pass filter and the comparator to obtain a discrete digital signal, and after Fourier transform of the discrete digital signal, acquisition of the acquisition system is completed; through calculation of the observed value, whether the number or the interations of the observed value numeric symbols which are inconsistent with the numeric symbols of the actual observed value reaches the maximum interations is judged and estimated, and further, the support base of a multiband sparse signal is calculated to realize reconstruction of original signals. The acquisition system is suitable for acquisition and reconstruction of multiband signals.

Description

technical field [0001] The invention relates to the field of multi-band signal acquisition, in particular to the field of comparator-based multi-channel parallel signal acquisition technology and signal reconstruction technology. Background technique [0002] In the field of multi-band signal processing, the traditional sampling process must follow the Nyquist sampling rate, that is, the sampling frequency must be greater than or equal to twice the highest frequency in the signal in order to accurately reconstruct the signal. Traditional Nyquist sampling methods become impractical when the frequency band range is large. In recent years, someone has proposed a Nyquist-sub-Nyquist sampling system——Modulated Wideband Converter (MWC) system for multi-band sparse signals. Multi-band sparse signals are multiplied by analog multipliers and periodic signals, then low-pass filtered, and finally sampled device and ADC quantizer. When the position of the signal frequency band is unkn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12
Inventor 张京超付宁杨柳
Owner 严格集团股份有限公司
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