CN105743529B - A kind of method of anti-mobile phone radio frequency interference - Google Patents
A kind of method of anti-mobile phone radio frequency interference Download PDFInfo
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- CN105743529B CN105743529B CN201610162119.8A CN201610162119A CN105743529B CN 105743529 B CN105743529 B CN 105743529B CN 201610162119 A CN201610162119 A CN 201610162119A CN 105743529 B CN105743529 B CN 105743529B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
- H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
Abstract
The invention discloses a kind of methods of anti-mobile phone radio frequency interference, and it is as follows that the method comprising the steps of：101st, new data are read in, and carry out asking poor processing with the last valid data, difference and a preset noise threshold are compared；102nd, new data is stored in big signal data sequence, and the data of the new data and the last big signal data sequence are carried out asking poor processing；103rd, new data is updated into valid data sequence, and exports valid data sequence and break；104th, new data is given up, exports original valid data sequence, terminate the judgement to current data.The present invention can targetedly inhibit from mobile phone radio frequency signal, the interference of special GSM radiofrequency signals, and can be realized only by software, do not increase cost, do not influence Refresh Data rate.
Description
Technical field
The invention belongs to jamproof technical fields, more particularly to a kind of anti-interference method for mobile phone GSM signals.
Background technology
With popularizing for smart mobile phone, mobile phone interference is ubiquitous, more and more hard after particularly Intelligent hardware rises
Part equipment needs and mobile phone is used cooperatively, thus the chance being interfered also bigger.There is high-acruracy survey function for some
Equipment, such as daily more typical sphygmomanometer, weighing apparatus etc., mobile phone serious interference influences its measurement accuracy, it is therefore desirable to
Carry out the design of anti-mobile phone interference.
For traditional Anti-interference Design generally be directed to the radio frequency interference of wide spectrum, it is big that counter-measure includes hardware and software two
Block for example increases RC low-pass filters on hardware, high-frequency interferencing signal is filtered out；On software, also using increase low-pass filter,
Notch filter, rejects the methods of maximin at medium filtering.More than means can play preferably the radio frequency interference of high frequency
Inhibition, but above means according to hardware approach, then easily increase cost；Using software approach, then may cause to survey
The refresh rate for measuring data declines；And for the interference of specific mobile phone signal, the particularly inhibition of GSM signal interferences not
It is good.Referring to attached drawing 1, current general filtering process flow is shown, after step S001 reads in new data, is carried out in step S002
Then median filter process carries out sliding average (being equivalent to low-pass filtering), and down-sampled rear output virtual value in step S003.
Either medium filtering or sliding frequency filtering, it is larger for amplitude, and long-term its filter effect of interference is all
It is very poor.
If patent application 201410206596.0 discloses a kind of anti-interference realization method with multi-radio device,
Including：The metal holder placed vertically is fixedly mounted on the mainboard, by a plurality of gsm modules and GPS module,
WIFI module, bluetooth module, FM modules, mobile communication module and NFC module separate；LCD display is used into metal shell packet
It covers；The GPS module, WIFI module, bluetooth module, FM modules and mobile communication module are respectively adopted independent shielding case into
Row shielding processing；Shielding processing will be made between the NFC antenna of the NFC module and the mainboard using shielding material；Pass through one
PID control device automatically controls the adjustment GPS module, WIFI module, bluetooth module, FM modules, mobile communication module, NFC
The transmission power of module and a plurality of gsm modules.The patent application is solved between multiple radio-frequency modules by the method for shielding
Interference problem, multiple shielding constructions need to be sampled and included to be directed to multiple radio-frequency modules, considerably increase the cost of hardware.
Invention content
To solve the above problems, the purpose of the present invention is to provide a kind of method of anti-mobile phone radio frequency interference, this method can
Effectively to inhibit the radio frequency interference from mobile phone, and do not increase hardware cost, do not influence the refresh rate of measurement data.
In order to achieve the goal above, the present invention provides a kind of method of anti-mobile phone radio frequency interference, the method comprising the steps of such as
Under：
101st, new data are read in, and carry out asking poor processing with the last valid data, difference and one is default
Noise threshold be compared；If difference is less than or equal to the noise threshold, which is valid data, jumps to step
103, otherwise the data are not valid data；
102nd, new data is stored in big signal data sequence, and by the new data and the last big signal data sequence
Data carry out asking poor processing；If the difference is less than or equal to above-mentioned noise threshold, duration count value adds 1, otherwise the time
Count clear 0；When duration count value is more than a scheduled duration threshold value N, judge that the new data for valid data, otherwise redirects
To 104；
103rd, new data being updated into valid data sequence, and exports valid data sequence, big signal data sequence empties,
Duration count value clear 0, terminates the judgement to current data；
104th, new data is given up, exports original valid data sequence, terminate the judgement to current data.
Specifically rate-determining steps are：
Step S101:A new measurement data is read in, and is subtracted each other with newest virtual value, acquires difference, that is, count
According to noise；
Step S102：Compare whether the noise is less than P-P noises, if then entering step S107, otherwise enter step
S104；P-P noises refer to the maximum noise value of the data sequence measured；
Step S103:Judge that new data is not temporarily valid data, therefore be sent into big signal data sequence；
Step S104:The new data of big signal data sequence and time new data are carried out that difference is asked to handle, compare difference and
The relationship of noise threshold P-P noises；If the difference is less than P-P noises, big signal stabilization duration count value LSNum is added 1, it is no
Then LSNum=0；
Step S105:Judge whether LSNum is more than preset duration count threshold N；If so, jump to step S107；
Otherwise continue step S106；
Step S106:Valid data sequence is not updated, jumps to S108；
Step S107:Judge that new data is valid data, updated into valid data sequence；By big signal data sequence
Row empty, duration count value LSNum clear 0；Jump to step S108；
Step S108:Conventional processing steps carry out median filter process to valid data sequence；
Step S109:Carry out sliding average and down-sampled processing；
Step S110:Output treated valid data；When previous new data is disposed, into next record new data
Processing cycle.
The present invention realizes anti-mobile phone radio frequency interference, can targetedly inhibit to penetrate from mobile phone by above-mentioned method
Frequency signal, the interference of special GSM radiofrequency signals, and can be realized only by software, do not increase cost, do not influence Refresh Data
Rate.
Description of the drawings
Fig. 1 is the flow chart that the prior art is implemented.
Fig. 2 is the control flow chart that the present invention is implemented.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Please refer to shown in Fig. 2, the method for anti-mobile phone radio frequency interference primarily with respect to new data whether be valid data into
Row judges, if valid data, then exports the data as newest measured value；Otherwise give up, retain last data
As current measurement value.
Specifically rate-determining steps are：
Step S101:A new measurement data is read in, and is subtracted each other with newest virtual value, acquires difference, that is, count
According to noise.
Step S102：Compare whether the noise is less than P-P noises.If then entering step S107, otherwise enter step
S104；P-P noises refer to the maximum noise value of the data sequence measured, it is considered that are the 6.6 of effective noise value RMS noises
Times, P-P noises can take 6.6 times of ratio RMS noises bigger value of any in actual use.P-P noises are one pre- in a word
If according to the related noise threshold of measurement data sequence self attributes.When the value sets too much, the anti-mobile phone radio frequency of entire method
The effect of interference can decline；But if the value is made too small, it is likely that loses useful data.
Step S103:Judge that new data is not temporarily valid data, therefore be sent into big signal data sequence.
Step S104:The new data of big signal data sequence and time new data are carried out that difference is asked to handle, compare difference and
The relationship of noise threshold P-P noises；If the difference is less than P-P noises, big signal stabilization duration count value LSNum is added 1, it is no
Then LSNum=0.
Step S105:Judge whether LSNum is more than preset duration count threshold N；If so, jump to step S107；
Otherwise continue step S106.
Step S106:Valid data sequence is not updated, jumps to S108.
Step S107:Judge that new data is valid data, updated into valid data sequence；By big signal data sequence
Row empty, duration count value LSNum clear 0；Jump to step S108.
Step S108:Conventional processing steps carry out median filter process to valid data sequence.
Step S109:Carry out sliding average and down-sampled processing.
Step S110:Output treated valid data；When previous new data is disposed, into next record new data
Processing cycle.
The method of the present invention can realize that anti-mobile phone radio frequency interferes only by software, can targetedly inhibit
From mobile phone radio frequency signal, the interference of special GSM radiofrequency signals does not increase cost, does not influence Refresh Data rate.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (1)
- A kind of 1. method of anti-mobile phone radio frequency interference, it is characterised in that this method rate-determining steps are：Step S101:A new measurement data is read in, and is subtracted each other with newest virtual value, acquires difference, that is, data Noise；Step S102：Compare whether the noise is less than P-P noises, if then entering step S107, otherwise enter step S104；P- P noises refer to the maximum noise value of the data sequence measured；Step S103:Judge that new data is not temporarily valid data, therefore be sent into big signal data sequence；Step S104:The new data of big signal data sequence and time new data are carried out that difference is asked to handle, compare difference and noise The relationship of threshold value P-P noises；If the difference is less than P-P noises, big signal stabilization duration count value LSNum is added 1, otherwise LSNum=0；Step S105:Judge whether LSNum is more than preset duration count threshold N；If so, jump to step S107；Otherwise Continue step S106；Step S106:Valid data sequence is not updated, jumps to S108；Step S107:Judge that new data is valid data, updated into valid data sequence；Big signal data sequence is clear Sky, duration count value LSNum clear 0；Jump to step S108；Step S108:Conventional processing steps carry out median filter process to valid data sequence；Step S109:Carry out sliding average and down-sampled processing；Step S110:Output treated valid data；When previous new data is disposed, into the processing of next record new data Cycle.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5440597A (en) * | 1993-11-23 | 1995-08-08 | Nokia Mobile Phones Ltd. | Double dwell maximum likelihood acquisition system with continuous decision making for CDMA and direct spread spectrum system |
| US20040174943A1 (en) * | 2002-01-02 | 2004-09-09 | Sirf Technology, Inc. | Narrowband noise mitigation in location-determining signal processing |
| CN103475428A (en) * | 2012-06-07 | 2013-12-25 | 陕西汉唐惠通通讯设备有限公司 | Processing method for preventing mobile phone signal interference in infrared human body detection |
| CN103685091A (en) * | 2012-08-28 | 2014-03-26 | 英特尔移动通信有限责任公司 | Interference and noise estimation of communications channel |
-
2016
- 2016-03-22 CN CN201610162119.8A patent/CN105743529B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5440597A (en) * | 1993-11-23 | 1995-08-08 | Nokia Mobile Phones Ltd. | Double dwell maximum likelihood acquisition system with continuous decision making for CDMA and direct spread spectrum system |
| US20040174943A1 (en) * | 2002-01-02 | 2004-09-09 | Sirf Technology, Inc. | Narrowband noise mitigation in location-determining signal processing |
| CN103475428A (en) * | 2012-06-07 | 2013-12-25 | 陕西汉唐惠通通讯设备有限公司 | Processing method for preventing mobile phone signal interference in infrared human body detection |
| CN103685091A (en) * | 2012-08-28 | 2014-03-26 | 英特尔移动通信有限责任公司 | Interference and noise estimation of communications channel |
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