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Method for identifying wave form in signal processing

A waveform recognition and signal processing technology, applied in the field of signal processing, can solve the problems of difficult selection of threshold and threshold value, difficult selection of threshold and threshold value, and difficult implementation

Inactive Publication Date: 2007-06-27
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Once the signal waveform is unstable and there is a certain fluctuation in the overall waveform amplitude, it is very difficult to select the threshold value and threshold value, because the entire signal range cannot be shaped by a preset threshold value and threshold value. The above two methods not easy to implement
If the signal received by the receiver is sometimes strong and sometimes weak, it will also cause difficulties in selecting thresholds and thresholds.

Method used

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  • Method for identifying wave form in signal processing
  • Method for identifying wave form in signal processing
  • Method for identifying wave form in signal processing

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] Figure 1 shows the waveform of the signal. In an actual system, the data of the signal waveform is obtained by sampling the signal through an analog-to-digital converter. The signal is an analog signal before sampling, and it is digitally sampled after an anti-aliasing low-pass filter. The sampled digital signal may contain unwanted noise, and the digital signal can be further eliminated by a digital low-pass filter to make the signal The waveform quality is improved.

[0037] Shown in Figure 2 is the waveform of the sampled digital signal after passing through the digital filter. Compared with the signal shown in Figure 1, the quality of the filtered signal waveform has been significantly improved.

[0038] Figure 3 intercepts the signal waveform at one end of the signal. In the figure, A, B, C, D, E, F, G, H, I, and J mark the end...

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Abstract

This invention discloses a method for identifying waveforms in signal process including: initializing waveform parameters, taking signal data as the data source for identifying waveforms, looiking for the rising edge or trailing edge in the signal waveforms based on the waveform variance trend, comparing with stored related waveform parameters based on the kind of the signal edge and its median to judge if the signal edge is effective, if not, continueing looking for rising edge or trailing edge, if the edge is effective, the stored related waveform parameters are updated, then computing pulse width and judging its numerical value to continue looking for rising edge or trailing edge.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a method for identifying waveforms in signal processing. Background technique [0002] In the field of communication, data information needs to be transmitted through electrical signals. In order to facilitate the representation of data, many signals are expressed in two states of 0 and 1, which are reflected in the strength of electrical signals as two different values ​​of high and low, a series of high and low intensities The signal represented constitutes the waveform of the signal. On the data receiving side, it is necessary to recover the pulse from the waveform of the signal to form a data form that is easy to judge. [0003] Commonly used waveform pulse shaping methods have limited clipping and threshold judgment. Limiting is by setting the high and low reference thresholds Href and Lref, the signal amplitude higher than Href will be limited to Href, and the signal ampl...

Claims

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Application Information

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IPC IPC(8): H03K5/125H03K5/01H03K5/08
Inventor 张建冯涛王晓磊
Owner ZTE CORP
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