CN1187915C - Method for detecting impulse interference in digital signal transmission - Google Patents
Method for detecting impulse interference in digital signal transmission Download PDFInfo
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- CN1187915C CN1187915C CNB031151299A CN03115129A CN1187915C CN 1187915 C CN1187915 C CN 1187915C CN B031151299 A CNB031151299 A CN B031151299A CN 03115129 A CN03115129 A CN 03115129A CN 1187915 C CN1187915 C CN 1187915C
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- impulse disturbances
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Abstract
The present invention discloses a detection method of pulse interference in digital signal transmission. The method comprises the following steps: monitoring the amplitude of a received digital signal; counting and comparing a time value by a viewing window counter; counting the time value of the digital signal when the amplitude of the digital signal is greater than a certain setting threshold value tau by an amplitude comparison counter. When the comparison time value of the viewing window counter reaches a certain setting time value, if the time value counted by the amplitude comparison counter is greater than the certain setting threshold value, the case indicates that pulse interference exists, else the pulse interference does not exists. The present invention can effectively and reliably detect pulse interference existing in digital signal transmission in time.
Description
Technical field
The invention belongs to field of signal transmissions, particularly carry out the method that impulse disturbances detects at the various digital signals of impulse disturbances that exist.
Background technology
In the transmission course of digital signal, because the closing of spark interference, power-supply fluctuation and powerful device, unlatching etc. all can cause impulse disturbances, make the amplitude signal to noise ratio excessive or instantaneous signal lower (being lower than threshold level) of the instantaneous signal that receiver receives, receiver is impacted, functional module performances such as AGC in the receiver, equalizer, Phase Tracking are worsened.This just need detect the digital signal that receives, as detect impulse disturbances, then provide a signal for AGC, equalizer, Phase Tracking etc., close or adjust the operating state of modules such as AGC, equalizer, Phase Tracking, by the time impulse disturbances makes modules such as AGC, equalizer, Phase Tracking later again, allow them be in normal operating conditions, to eliminate the influence of impulse disturbances to modules such as AGC, equalizer, Phase Tracking.
Summary of the invention
The detection method that the purpose of this invention is to provide a kind of impulse disturbances can detect the impulse disturbances that exists in the digital data transmission in time, effectively, reliably.
Impulse disturbances detection method of the present invention is such: the digital signal amplitude that receives is monitored, watch window counters count number of comparisons value is set, the window enumeration device all is from 0 to certain set point M at every turn, judges whether to exist impulse disturbances when counting M at every turn; The amplitude that is provided with compares counters count digital signal amplitude and sets the inferior numerical value of threshold value τ greater than certain.If there is not impulse disturbances in previous watch window, when the number of comparisons value of current watch window counter reaches M, if the amplitude relatively inferior numerical value of counters count is set the limit value A of wealthy family greater than certain, show that then there is impulse disturbances in this watch window, if amplitude compares the inferior numerical value of counters count smaller or equal to threshold value A, then think not have impulse disturbances; If there is impulse disturbances in previous watch window, when the number of comparisons value of current watch window counter reaches M, if the amplitude relatively inferior numerical value of counters count is set threshold ones B less than certain, show that then there is not impulse disturbances in this watch window, if amplitude compares the inferior numerical value of counters count more than or equal to threshold value B, then think still to have impulse disturbances.Adopt this kind method that digital signal is detected, can detect the impulse disturbances that whether exists in the transmission in time, effectively.Set high and low two thresholdings of digital signal amplitude simultaneously, make testing result more reliable greater than the inferior numerical value of τ.
Description of drawings
Fig. 1 is the impulse disturbances schematic diagram;
Fig. 2 is the Gaussian distribution curve of range value;
Fig. 3 is one embodiment of the invention block diagram;
Fig. 4 is the window comparator schematic diagram.
Embodiment
Fig. 1 has shown the transmission system of level more than, and solid line is represented level value, and two dotted lines that each level value is adjacent are represented two thresholdings up and down of this level value, and the value that is between these two dotted lines is all represented this level.With the Upper threshold τ of maximum level as the amplitude reference value relatively that whether has impulse disturbances.As shown in Figure 2, be in each level signal amplitude value on every side and all be Gaussian Profile, the absolute value of signal amplitude is all represented this level less than the zone of τ, is used as improper signal greater than the zone of τ.Concerning maximum level, be used as improper letter greater than the zone of τ.
The realization block diagram of this method as shown in Figure 3, first comparator in the block diagram is that the amplitude of input signal and threshold value τ are made comparisons, second comparator is that the result of amplitude comparison counter and threshold value A or B are made comparisons.Set up two counters in addition, one is the watch window counter, adopts mode M counter, as watch window, allows it count under work clock always.Another is a relatively counter of amplitude, is used for range value is counted greater than the signal of reference value τ.When the range value of signal during greater than τ, amplitude comparison counter adds 1, otherwise amplitude relatively counter keep.
As shown in Figure 4, when the value of watch window counter is M-1, compare the value of counter with regard to the investigation amplitude.Do not exist at previous watch window under the situation of impulse disturbances, if amplitude compares the value of counter greater than the limit value A of wealthy family, so just judge impulse disturbances to have occurred that at this moment the impulse disturbances marking signal is changed to ' 1 ', and keeping always, up to detect do not have impulse disturbances till; If amplitude compares the value of counter smaller or equal to threshold value A, so just thinking does not have impulse disturbances, and at this moment the impulse disturbances marking signal is changed to ' 0 '.
Exist under the impulse disturbances situation at previous watch window, (B＜A), so just can judge does not have impulse disturbances this moment, if original impulse disturbances marking signal was ' 1 ', then is changed to ' 0 ' if the value of amplitude comparison counter is less than threshold ones B; If originally the impulse disturbances marking signal is ' 0 ', then keep.If amplitude compares the value of counter less than A and greater than B, then thinking still has impulse disturbances, keeps original impulse disturbances marking signal.
Whether the impulse disturbances marking signal is used to refer to modules such as AGC, equalizer, Phase Tracking can operate as normal.When this signal is ' 1 ', close or adjust the operating state of modules such as AGC, equalizer, Phase Tracking, to eliminate the influence that impulse disturbances causes; When this signal is ' 0 ', then make modules such as AGC, equalizer, Phase Tracking get back to normal operating conditions.
Claims (1)
1, the impulse disturbances detection method in the digital data transmission, it is characterized in that this method comprises the steps: the digital signal amplitude that receives is monitored, watch window counters count number of comparisons value is set, the window enumeration device all is from 0 to certain set point M at every turn, judges whether to exist impulse disturbances when counting M at every turn; The amplitude that is provided with compares counters count digital signal amplitude and sets the inferior numerical value of threshold value τ greater than certain; If there is not impulse disturbances in previous watch window, when the number of comparisons value of current watch window counter reaches M, if the amplitude relatively inferior numerical value of counters count is set the limit value A of wealthy family greater than certain, show that then there is impulse disturbances in this watch window, if amplitude compares the inferior numerical value of counters count smaller or equal to threshold value A, then think not have impulse disturbances; If there is impulse disturbances in previous watch window, when the number of comparisons value of current watch window counter reaches M, if the amplitude relatively inferior numerical value of counters count is set threshold ones B less than certain, show that then there is not impulse disturbances in this watch window, if amplitude compares the inferior numerical value of counters count more than or equal to threshold value B, then think still to have impulse disturbances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031151299A CN1187915C (en) | 2003-01-24 | 2003-01-24 | Method for detecting impulse interference in digital signal transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031151299A CN1187915C (en) | 2003-01-24 | 2003-01-24 | Method for detecting impulse interference in digital signal transmission |
Publications (2)
| Publication Number | Publication Date |
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| CN1447541A CN1447541A (en) | 2003-10-08 |
| CN1187915C true CN1187915C (en) | 2005-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031151299A Expired - Fee Related CN1187915C (en) | 2003-01-24 | 2003-01-24 | Method for detecting impulse interference in digital signal transmission |
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| CN (1) | CN1187915C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI555343B (en) * | 2014-01-14 | 2016-10-21 | 晨星半導體股份有限公司 | Receiving method and apparatus of multiple-carrier signals |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179283B (en) * | 2007-09-28 | 2011-01-12 | 杭州国芯科技股份有限公司 | Method of detecting and suppressing pulse noise |
| JP5605568B2 (en) * | 2010-12-28 | 2014-10-15 | 住友電気工業株式会社 | Overpower detection device and wireless communication device |
| CN103197161A (en) * | 2013-03-26 | 2013-07-10 | 北京清电华力电气自动化科技有限公司 | Detection method for impulse interference in weak direct current signals |
| CN104090513B (en) * | 2014-07-15 | 2018-02-23 | 无锡飞翎电子有限公司 | A kind of new pulse signal detection method |
| CN105356865B (en) * | 2015-12-09 | 2018-09-21 | 深圳Tcl数字技术有限公司 | Remove the method, apparatus and smart television of interference |
| WO2018213973A1 (en) * | 2017-05-22 | 2018-11-29 | 深圳配天智能技术研究院有限公司 | Signal processing method and system, and relevant device |
| CN111918196B (en) * | 2019-05-08 | 2022-04-19 | 腾讯科技（深圳）有限公司 | Method, device and equipment for diagnosing recording abnormity of audio collector and storage medium |
| CN113484836A (en) * | 2021-05-26 | 2021-10-08 | 惠州市德赛西威智能交通技术研究院有限公司 | Interference detection and elimination method based on time domain signal amplitude difference sorting |
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2003
- 2003-01-24 CN CNB031151299A patent/CN1187915C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI555343B (en) * | 2014-01-14 | 2016-10-21 | 晨星半導體股份有限公司 | Receiving method and apparatus of multiple-carrier signals |
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| CN1447541A (en) | 2003-10-08 |
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Address after: No. 90, Wensanlu Road, Hangzhou, Zhejiang, Xihu District Patentee after: Hangzhou National Chip Science & Technology Co., Ltd. Address before: No. 516, Hangzhou Road, seven Xixi Road, Zhejiang, China Patentee before: Hangzhou Guoxin Science & Technology Co., Ltd. |
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Granted publication date: 20050202 Termination date: 20180124 |