CN103187980A - Device and method of interfering private signal amplifier - Google Patents
Device and method of interfering private signal amplifier Download PDFInfo
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- CN103187980A CN103187980A CN2011104529472A CN201110452947A CN103187980A CN 103187980 A CN103187980 A CN 103187980A CN 2011104529472 A CN2011104529472 A CN 2011104529472A CN 201110452947 A CN201110452947 A CN 201110452947A CN 103187980 A CN103187980 A CN 103187980A
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Abstract
The invention provides a device and method of interfering a private signal amplifier. The device of interfering the private signal amplifier comprises an interfering signal generating unit, a power amplifying unit and a transmitting antenna, wherein the interfering signal generating unit is used for generating downlink interfering signals of a preset frequency point, the preset frequency point is within a preset working frequency range, the power amplifying unit is used for carrying out power amplifying on the downlink interfering signals, and the transmitting antenna is used for transmitting downlink interfering signals with amplified power. A frequency point not used is selected in the preset working frequency range, the interfering signal generating unit generates a downlink interfering signal of the frequency point, and the downlink interfering signal is sent out after frequency selection and power amplifying to interfere the private signal amplifier.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of apparatus and method of disturbing private dress signal amplifier.
Background technology
At present because illegal signals amplifier price is more and more lower, performance worse and worse, the signal amplifier that causes private to be adorned prevails and the mobile network is produced considerable influence, particularly uplink interference has had a strong impact on the Internet phone-calling quality, cause that the network uplink interference region produces a large amount of the complaint, influences mobile message expert's Premium Brands image.
The structured flowchart of the signal amplifier of private dress as shown in Figure 1 at present, this signal amplifier comprises signal receiving end DT, signal transmitting terminal MT, receiving duplexer 11, ascending power amplifier 12, downlink power amplifier 13 and emission duplexer 14, wherein, described receiving duplexer 11 and described emission duplexer 14 are mainly used in suppressing the working band external signal, and the branch opening and closing road of uplink band and band downlink; Described ascending power amplifier 12 is mainly used in amplifying up radiofrequency signal, and described downlink power amplifier 13 is mainly used in amplifying descending radiofrequency signal.
Owing to limited by cost, the signal amplifiers of most of private dresses all do not have low noise amplifier and frequency-selecting module, thus all be transparent transmission to the signal of all frequency ranges, without any inhibit feature.The device of the signal amplifier of private dress employing simultaneously also mostly is the second-hand device of mountain vallage producer or regular producer, and power amplification efficiency is low, poor durability, and the long-term work meeting causes the non-linear amplifying signal of power amplifier, thereby produces intermodulation, clutter interference.
Compare with regular wireless signal amplifier, the defective of the signal amplifier of private dress is as follows:
1, do not have the frequency-selective filtering function, the full frequency band signal is amplified;
2, signal receiving end does not have the protection of attenuator, and under the situation that receives strong signal interference, power amplifier reaches capacity easily;
3, the power amplifier job stability is not good, working under the saturation condition for a long time, is easy to burn out, and perhaps closes output.
In addition, the power amplification of the signal amplifier of private dress has certain linear magnification region, and there is a saturated situation of prime power amplifier, be that the input signal of final stage power amplifier is not when also reaching maximum, the output signal amplitude of the signal amplifier of private dress has reached operational voltage value, output voltage can not increase again when the input signal of final stage power amplifier continues to increase, the peak value of the output current of final stage power amplifier has not increased with the increase of input signal yet, and at this moment the top distortion has appearred cutting in the output waveform of the signal amplifier of private dress.
Fig. 2 is the schematic diagram that concerns of the input power that draws at the test that the signal amplifier of private dress is done and power output, as can be seen from Figure 2 when input power reach-during 45dBm, the power output control of the signal amplifier of private dress is about 12dBm, can not continue to rise, at this moment the power amplifier of the signal amplifier of private dress has entered saturated.
In the middle of the mobile network of villages within the city builds at present, because illegal signal amplifier price is more and more lower, performance worse and worse, the signal amplifier that causes private to be adorned prevails and the mobile network is produced considerable influence, particularly uplink interference has had a strong impact on the Internet phone-calling quality, causes that the network uplink interference region produces a large amount of the complaint.The signal amplifier of private dress is more and more serious for the interference of network, for the dismounting of the signal amplifier of private dress with replace with, do a lot, obtained certain effect, but because the private dress of part owner is for mobile network's understanding deficiency, for removing and more changed jobs some resentment, still there is the interference of the signal amplifiers of many private dresses to exist in the middle of causing network, therefore a kind of apparatus and method of disturbing private dress signal amplifier need be provided.
Summary of the invention
Main purpose of the present invention is to provide a kind of apparatus and method of disturbing private dress signal amplifier, can be so that the signal amplifier power amplifier of private dress is saturated, to disturb the signal amplifier of private dress.
In order to achieve the above object, the invention provides a kind of device that disturbs private dress signal amplifier, comprising:
The interference signal generating unit, for generation of the descending interference signal of predetermined frequency, this predetermined frequency is within predefined working frequency range;
Power amplification unit is used for described descending interference signal is carried out power amplification;
Transmitting antenna is used for the descending interference signal after transmitting power is amplified.
During enforcement, the device of the private dress of interference of the present invention signal amplifier also comprises the down frequency selection unit;
Described down frequency selection unit is used for described descending interference signal is carried out frequency-selecting to suppress the signal outside this working frequency range;
Described power amplification unit is further used for the descending interference signal after the frequency-selecting is carried out power amplification.
During enforcement, described interference signal generating unit is the point-frequency signal generating unit.
During enforcement, the frequency band of the descending interference point-frequency signal that this point-frequency signal generating unit produces is 200KHz.
During enforcement, this predetermined frequency is middle protection frequency 95.
During enforcement, the power of the descending interference signal that described interference signal generating unit produces is 48 to 53dBm, and the gain of described transmitting antenna is 10 to 15dB.
The invention provides a kind of method of disturbing private dress signal amplifier, may further comprise the steps:
Step 1: produce the descending interference signal of predetermined frequency, this predetermined frequency is within predefined working frequency range;
Step 2: described descending interference signal is carried out power amplification;
Step 3: the descending interference signal after transmitting power is amplified.
During enforcement, also comprising the frequency-selecting step between step 1 and the step 2: described descending interference signal is carried out frequency-selecting to suppress the signal outside this working frequency range;
Step 2 further comprises: the descending interference signal after the frequency-selecting is carried out power amplification.
Compared with prior art, the apparatus and method of disturbing private dress signal amplifier of the present invention, choose predefined frequency that is not used in this working frequency range, produce the descending interference signal of this frequency by the interference signal generating unit, and will go out by transmission antennas transmit after its frequency-selecting, the power amplification, to disturb private dress signal amplifier.
Description of drawings
Fig. 1 is the structured flowchart of the signal amplifier of private dress;
Fig. 2 is the schematic diagram that concerns of the input power that draws at the test that the signal amplifier of private dress is done and power output;
Fig. 3 is the structural representation that disturbs the device of private dress signal amplifier of the present invention;
Fig. 4 is the flow chart that disturbs the method for private dress signal amplifier of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, below in conjunction with drawings and the specific embodiments the present invention is further described in detail again.
Signal amplifier at the private dress does not have the frequency-selective filtering function, the shortcoming that the signal of mobile network's whole working frequency range is amplified, the invention provides a kind of apparatus and method of disturbing private dress signal amplifier, from predefined working frequency range, choose a frequency that is not used, produce the descending interference signal of this frequency by the interference signal generating unit, and will go out by transmission antennas transmit after its frequency-selecting, the power amplification, to disturb private dress amplifier.
As shown in Figure 3, the described device of private dress signal amplifier that disturbs of one embodiment of the invention comprises interference signal generating unit 31, down frequency selection unit 32, power amplification unit 33 and transmitting antenna 34, wherein,
Described interference signal generating unit 31 communicates to connect with described down frequency selection unit 32, and for generation of the descending interference signal of predetermined frequency, this predetermined frequency is within predefined working frequency range;
Described down frequency selection unit 32 is used for described descending interference signal is carried out frequency-selecting suppressing the signal outside this working frequency range, and the descending interference signal after the frequency-selecting is sent to described power amplification unit 33;
Described power amplification unit 33 is connected with described down frequency selection unit 32, is used for carrying out power amplification from the descending interference signal of described down frequency selection unit 32;
Described transmitting antenna 34 communicates to connect with described power amplification unit 33, is used for the descending interference signal after transmitting power is amplified.
In the device of the private dress of the described interference of this embodiment signal amplifier, owing to may be doped with the signal outside the predefined working frequency range in the descending interference signal that described interference signal generating unit 31 produces, therefore need to adopt described down frequency selection unit 32 by the signal outside this working frequency range of frequency-selecting filtering.
During enforcement, described predefined working frequency range can be China Mobile GSM (global system for mobile communications) working frequency range.
According to a kind of embodiment, described interference signal generating unit 31 is the point-frequency signal generating unit; This point-frequency signal generating unit is for generation of descending interference point-frequency signal, and the frequency of this descending interference point-frequency signal is within predefined working frequency range, and the frequency band of this descending interference point-frequency signal is 200KHz when preferred.
According to a kind of embodiment, this predetermined frequency is middle protection frequency 95.
(Ls is loss of signal according to Okumura model Ls=32.45+20lgf+20lgd, f is frequency, d is distance), estimate transmission through 1 kilometer 900M loss of signal at 91dB, transmission through the loss of 1 kilometer 1800M signal at 97.6dB, so if make in 1 kilometer range private dress signal amplifier receiving intensity-20dBm～-30dBm, then need the power of interference signal generating unit 31 at 48～53dBm, the gain of transmitting antenna 34 is at 10～15dB.
Therefore, when preferred, the power of described interference signal generating unit 31 is 48～53dBm, and the gain of described transmitting antenna 34 is 10～15dB.
During enforcement, described frequency-selecting unit 32 can be filter, and described transmitting antenna 34 can be the antenna of ANT1-6F for model.
As shown in Figure 4, the present invention also provides a kind of method of disturbing private dress signal amplifier, may further comprise the steps:
Step 41: the interference signal generating unit produces the descending interference signal of predetermined frequency, and this predetermined frequency is within predefined working frequency range;
Step 42: the down frequency selection unit carries out frequency-selecting suppressing the signal outside this working frequency range to described descending interference signal, and the signal after the frequency-selecting is sent to power amplification unit;
Step 43: power amplification unit is to carrying out power amplification from the descending interference signal after the frequency-selecting of described down frequency selection unit;
Step 44: the descending interference signal after the transmission antennas transmit power amplification.
The apparatus and method of disturbing private dress signal amplifier of the present invention are only launched descending interference signal, can not influence upward signal.
The present invention mainly produces the descending interference signal of predetermined frequency by the interference signal generating unit, after by the frequency-selecting module this descending interference signal being carried out frequency-selective filtering, by power amplification unit this descending interference signal behind frequency-selective filtering is suitably amplified again, form descending strong jamming point-frequency signal, at last, high via gain, wave beam is narrower, directivity transmitting antenna preferably penetrates this descending strong jamming point-frequency signal, utilize the equipment quality of the signal amplifier of private dress, the power amplifier performance, stability etc. are relatively poor characteristics all, make the power amplifier of the private signal amplifier of adorning saturated, useful frequency gain is compressed, thereby the overlay area signal of the signal amplifier of private dress is weakened, then look for private dress owner to coordinate private dress amplifier is removed again, the work of changing or transforming has realized that anti-private dress disturbs the effect of assaulting fortified position.At last, transform by the signal amplifier of illegal private dress is rectified and improved to replace, and then reach the purpose of eliminating network interferences.
More than explanation is just illustrative for the purpose of the present invention; and nonrestrictive, those of ordinary skills understand, under the situation that does not break away from the spirit and scope that claims limit; can make many modifications, variation or equivalence, but all will fall within the scope of protection of the present invention.
Claims (8)
1. a device that disturbs private dress signal amplifier is characterized in that, comprising:
The interference signal generating unit, for generation of the descending interference signal of predetermined frequency, this predetermined frequency is within predefined working frequency range;
Power amplification unit is used for described descending interference signal is carried out power amplification;
Transmitting antenna is used for the descending interference signal after transmitting power is amplified.
2. the device that disturbs private dress signal amplifier as claimed in claim 1 is characterized in that, also comprises the down frequency selection unit;
Described down frequency selection unit is used for described descending interference signal is carried out frequency-selecting to suppress the signal outside this working frequency range;
Described power amplification unit is further used for the descending interference signal after the frequency-selecting is carried out power amplification.
3. the device that disturbs private dress signal amplifier as claimed in claim 1 or 2 is characterized in that described interference signal generating unit is the point-frequency signal generating unit.
4. the device that disturbs private dress signal amplifier as claimed in claim 3 is characterized in that the frequency band of the descending interference point-frequency signal that this point-frequency signal generating unit produces is 200KHz.
5. the device that disturbs private dress signal amplifier as claimed in claim 1 is characterized in that, this predetermined frequency is middle protection frequency 95.
6. the device that disturbs private dress signal amplifier as claimed in claim 1 is characterized in that, the power of the descending interference signal that described interference signal generating unit produces is 48 to 53dBm, and the gain of described transmitting antenna is 10 to 15dB.
7. a method of disturbing private dress signal amplifier is characterized in that, may further comprise the steps:
Step 1: produce the descending interference signal of predetermined frequency, this predetermined frequency is within predefined working frequency range;
Step 2: described descending interference signal is carried out power amplification;
Step 3: the descending interference signal after transmitting power is amplified.
8. the method for disturbing private dress signal amplifier as claimed in claim 7 is characterized in that,
Also comprising the frequency-selecting step between step 1 and the step 2: described descending interference signal is carried out frequency-selecting to suppress the signal outside this working frequency range;
Step 2 further comprises: the descending interference signal after the frequency-selecting is carried out power amplification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104529472A CN103187980A (en) | 2011-12-29 | 2011-12-29 | Device and method of interfering private signal amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104529472A CN103187980A (en) | 2011-12-29 | 2011-12-29 | Device and method of interfering private signal amplifier |
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| CN103187980A true CN103187980A (en) | 2013-07-03 |
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| CN2011104529472A Pending CN103187980A (en) | 2011-12-29 | 2011-12-29 | Device and method of interfering private signal amplifier |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2615985Y (en) * | 2003-05-16 | 2004-05-12 | 成都立鑫新技术科技有限公司 | Cell phone signal isolator |
| CN200990605Y (en) * | 2006-06-09 | 2007-12-12 | 北京创远汇智科技有限公司 | High precision micro-power cell phone signal interference unit |
| CN102104437A (en) * | 2011-01-11 | 2011-06-22 | 北京理工大学 | Radio system for preventing cheating on exams |
-
2011
- 2011-12-29 CN CN2011104529472A patent/CN103187980A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2615985Y (en) * | 2003-05-16 | 2004-05-12 | 成都立鑫新技术科技有限公司 | Cell phone signal isolator |
| CN200990605Y (en) * | 2006-06-09 | 2007-12-12 | 北京创远汇智科技有限公司 | High precision micro-power cell phone signal interference unit |
| CN102104437A (en) * | 2011-01-11 | 2011-06-22 | 北京理工大学 | Radio system for preventing cheating on exams |
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Application publication date: 20130703 |