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Method and device for eliminating impulse noise

A technology for eliminating pulse and pulse noise, which is applied in the direction of transmission noise suppression, line transmission parts, electrical components, etc., can solve the problem that the calculated average power is large, the time domain signal cannot be detected, and the impact of pulse noise cannot be better eliminated and other problems to achieve the effect of eliminating influence and improving accuracy

Inactive Publication Date: 2013-07-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the influence of high peak-to-average ratio or long-duration impulse noise, the signal value of some of the time-domain signals included in the acquired time-domain signal becomes very large, making the calculated average power too large, As a result, some time-domain signals affected by impulse noise cannot be detected, and thus the influence of impulse noise on time-domain signals cannot be better eliminated

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  • Method and device for eliminating impulse noise

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Embodiment 1

[0058] Such as figure 1 As shown, the embodiment of the present invention provides a method for eliminating impulse noise, the method comprising:

[0059] Step 101: periodically collect the carrier wave, and obtain the time domain signal included in one cycle;

[0060] Step 102: Select a time domain signal whose signal power is less than a preset power threshold from the time domain signals included in the one cycle;

[0061] Step 103: Calculate the average power according to the signal power of the selected time-domain signal;

[0062] Step 104: According to the average power, detect and eliminate impulse noise from the time domain signal included in the one period.

[0063] In the embodiment of the present invention, the carrier is collected periodically, the time-domain signals included in one cycle are obtained, and the time-domain signals whose signal power is less than the preset power threshold are selected from the time-domain signals included in the one cycle , cal...

Embodiment 2

[0065] Such as figure 2 As shown, the embodiment of the present invention provides a method for eliminating impulse noise, the method comprising:

[0066] Step 201: Periodically collect the carrier wave to obtain the time domain signal included in one cycle;

[0067] Specifically, the time-domain signal acquisition device periodically collects the carrier, and acquires the time-domain signal included in one cycle of the carrier.

[0068] Step 202: According to the signal value of each time domain signal included in the one cycle, respectively calculate the signal power of each time domain signal included in the one cycle;

[0069] Specifically, the signal power of the time domain signal is calculated according to the signal value of the time domain signal included in one cycle acquired from the carrier and the formula (1).

[0070] p=|x| 2 ……(1)

[0071] Wherein, x is the signal value of any time-domain signal included in one period, and p is the signal power of the time-...

Embodiment 3

[0114] Such as Figure 4 As shown, the embodiment of the present invention provides a device for eliminating impulse noise, which includes:

[0115] The acquisition module 301 is configured to periodically acquire the carrier wave and obtain the time domain signals included in one cycle;

[0116] The first selection module 302 is configured to select a time domain signal whose signal power is less than a preset power threshold from the time domain signals included in the one cycle;

[0117] The first calculation module 303 is used to calculate the average power according to the signal power of the selected time domain signal;

[0118] The first elimination module 304 is configured to detect and eliminate impulse noise from the time domain signal included in the one cycle according to the average power.

[0119] Further, the device also includes:

[0120] The second calculation module 305 is configured to separately calculate the signal power of each time domain signal inclu...

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Abstract

The invention discloses a method and a device for eliminating impulse noise, and belongs to the field of communication. The method comprises the following steps of: acquiring a carrier wave periodically to acquire time-domain signals which are included within a period; selecting a time-domain signal of which the signal power is smaller than a preset power threshold value from the time-domain signals which are included within the period; calculating average power according to the signal power of the selected time-domain signal; and detecting and eliminating the impulse noise in the time-domain signals which are included within the period according to the average power. The device comprises an acquisition module, a first selection module, a first calculation module and a first elimination module. According to the method and the device, the average power is calculated according to the selected time-domain signal of which the signal power is smaller than the preset power threshold value; and the impulse noise in the time-domain signals is detected and eliminated according to the average power to improve the accuracy of detecting the impulse noise, so that the influence of the impulse noise on the time-domain signals can be eliminated better.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for eliminating impulse noise. Background technique [0002] In a PLC (Power-Line Communication, power line communication) system, impulse noise is a very typical and common interference. Impulse noise has the characteristics of sudden change, high energy, and wide coverage frequency range, which has a great impact on the carrier signal. In data communication, impulse noise is the main reason that affects the normal operation of the entire system. [0003] The prior art provides a method for eliminating impulse noise, specifically: periodically collect the carrier, obtain the time-domain signals included in one cycle, and calculate respectively according to the signal values ​​of the time-domain signals included in the one cycle The signal power of the time domain signal included in the cycle is obtained, and then the average power is calculated according to the sig...

Claims

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Application Information

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IPC IPC(8): H04B3/54H04B3/46H04B15/00
Inventor 朱伟曾云宝
Owner HUAWEI TECH CO LTD
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