CN1241885A - Apparatus and method for determining location of interference source and for measuring interference signal emitted therefrom - Google Patents
Apparatus and method for determining location of interference source and for measuring interference signal emitted therefrom Download PDFInfo
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- CN1241885A CN1241885A CN99108545A CN99108545A CN1241885A CN 1241885 A CN1241885 A CN 1241885A CN 99108545 A CN99108545 A CN 99108545A CN 99108545 A CN99108545 A CN 99108545A CN 1241885 A CN1241885 A CN 1241885A
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Abstract
Device includes antenna to detect at least one external signal source, motor to rotate antenna, low-noise amplifier to amplify at least one external signal detected by antenna, analyzer of spectrum of measurement of at least one signal characteristic of amplified signal and processor to control motor and spectrum analyzer. Method includes stages of reception of at least one external signal through directional antenna rotated by motor, amplification of detected external signal by low-noise amplifier, analysis of amplified signal by spectrum analyzer and presentation of analyzed signal on screen. Screen shows location of radio interference source and at least one measurement of single characteristic of at least one external signal. In addition method includes stages of conversion of scanning rate of directional antenna to time azimuth and measurement of at least one characteristic of analyzed signal in corresponding time azimuth. raised precision of determination of location of radio interference source. 10 cl, 3 dwg.
Description
The application requires that to be submitted to korean industrial property office, sequence number be No.98-26411 on July 1st, 1998, is entitled as the priority of the patent application of " apparatus and method (Apparatus and Method ForMeasuring Interference Source) of measuring interference source ", and it is for reference to list its content at this.
The present invention relates generally to a kind of cellular mobile telecommunication system, relate in particular to a kind of definite position of interference source and measure the apparatus and method of the interference signal that interference source sends.
Cellular mobile telecommunication system is divided into a plurality of sub-districts with whole service area, and each sub-district provides service by the base station.By placing the base station of each cell centre, the user can communicate when each moving between cells each other.This project organization of cellular system can make travelling carriage, and the sub-district of service is provided and is entered by a base station can persistent call when providing another sub-district of service by another base station shifting out.In addition, this project organization that is divided into a plurality of sub-districts with regard to service area makes and reuses same frequency and become possibility.This has just improved the frequency service efficiency, makes system can hold more user.For example, the mobile communication system that adopts code division multiple access (CDMA) technology send signal to share with each user frequently before, by multiply by an intrinsic code, and, on a carrier wave, send signal by spread bandwidth.
Because by the interference that each provenance produces, the performance of cdma system often descends to some extent.For example, the signal between each neighbor base station causes interactive interference.But, general by the suitable position of selecting each base station in mobile communication system, and make the interactive interference minimum that causes by the signal between each neighbor base station.This is important optimizing the cdma system aspect of performance.Therefore, when selecting base station location, measure external interference signals, be interfered on the position of effect of signals minimum so that the base station is positioned at this base station with special frequency band.
The U.S. Patent No. 3,783,448 that is entitled as " device (Apparatus For Measuring ElectromagneticRadiation) of measuring electromagnetic radiation " discloses a kind of electromagnetic antenna of reception and detector of using and has measured the device of electromagnetic radiation.But, fail on the base station to determine and to measure fully the source and the intensity of the interference signal that occurs in the mobile communication system as disclosed this device of other prior art equipment.
The present invention attempt to provide a kind of be used to use by the directive antenna of driven by motor rotation determine to send interference signal or external signal interference source the position and measure the apparatus and method of at least one signal characteristic of interference signal.
Device according to one preferred embodiment of the present invention comprises: antenna is used to detect this at least one external signal; Motor is used to drive this antenna rotation; Low noise amplifier, be used for to by this antenna detection to this at least one external signal amplify; Spectrum analyzer is used to measure this at least one signal characteristic of amplifying signal; And processor controls, be used to control this motor and this spectrum analyzer.
Preferably this antenna is a directive antenna.In addition, this antenna YAGI antenna preferably.Moreover preferably this antenna has narrow beam width.Best, the gain of this low noise amplifier is greater than 35dB.
Described motor is scheduled to the anglec of rotation according to the beamwidth of antenna with described antenna rotation, and sends the information of the relevant anglec of rotation to described processor controls.Described processor controls is determined the orientation/time relationship with respect to described motor, and obtains the measure signal intensity of correspondence on time aziniuth from described spectrum analyzer, shows measure signal intensity according to orientation/time relationship on screen.
The preferred method of the present invention comprises the steps: by received this at least one external signal by antenna; By low noise amplifier received external signal is amplified; Analyze amplifying signal by spectrum analyzer; With recently represent analytic signal with interference radiating way-power level.This method also comprises the steps: to rotate this directive antenna; The rotary speed of this directive antenna is transformed into the orientation; With power level according to each azimuthal measurement analytic signal.
Best, the gain of this low noise amplifier is greater than 35dB.In addition, best, with interference radiating way-power level represent recently that the step of analytic signal shows overlapping result and no matter measuring period how.
To following detailed description of the present invention, above-mentioned purpose of the present invention, feature and advantage will become clearer with reference to accompanying drawing, in the accompanying drawing:
Fig. 1 is that the present invention is used to determine to send the position of interference source of interference signal and the block diagram of the device of measuring interference signal intensity;
Fig. 2 is the position of the interference source that measures of expression the present invention and the figure of amplitude; With
Fig. 3 is the flow chart that the present invention measures the method for the interference signal intensity of being sent by interference source.
The preferred embodiments of the present invention are described below with reference to accompanying drawings.In the following description, will known various functions and structure be described in detail, obscure because this may cause the details of necessity.
The invention provides a directive antenna, this antenna can be found out the position of interference source that sends the interference signal of disturbing with the signal coherence of being sent by base station system.The present invention also provides the method for determining to send the position of interference source of interference signal and measuring interference signal intensity.
In the present invention, the signal strength signal intensity that the direction of measurement antenna is received is presented at measurement result on screen or the monitor.The most handy diagrammatic representation result on the screen shows the direction and the amplitude of interference signal.This figure can be used to determine the cell scenario of mobile communication system, and determines in system where the base station to be placed on.
Fig. 1 illustrates the structure that the present invention determines to send the position of interference source of at least one interference signal and measures the device of interference signal intensity.As shown in Figure 1, this device comprises: antenna 100 is used to detect external signal; Motor 200 is used to rotate this antenna; Low noise amplifier (LNA) 300, be used to amplify by antenna detection to signal; Spectrum analyzer 400 is used for the measuring-signal feature, for example the direction of propagation of amplifying signal, amplitude, frequency; With processor controls 500, be used to control motor and spectrum analyzer.
2 and 3 operations of describing apparatus of the present invention below with reference to accompanying drawings.At least the antenna 100 of measuring external signal is directive antenna preferably, and more particularly, antenna 100 is preferably the YAGI antenna with narrow beam width.Motor 200 is preferably stepping motor, and it makes YAGI antenna rotation special angle with respect to the beamwidth of YAGI antenna.If the swing circle of antenna 100 is known, the angle in the time of then can determining measured signal level and amplitude after the rotation for the first time.For example, if swing circle is 4 seconds, be 90 ° of signal levels on the direction then in the signal level of measuring on 1 second, the signal level of measuring on 2 seconds is 180.Signal level on the direction.
With reference to Fig. 1, processor controls 500 comprises PCMCIA (PCMCIA (personal computer memory card international association))-GPIB (general-purpose interface bus) card, and it controls motors 200 by parallel cable 2, and by GPIB1 control spectrum analyzer 400.Processor controls 500 converts the rotary speed of motor 200 to orientation/time relationship, i.e. orientation under the time-division reading on the timepiece dial, and determine the signal level on each time aziniuth, measured by spectrum analyzer 400.Time aziniuth when processor controls 500 is measured motors 200 rotations, and obtain the signal strength signal intensity that measures in each corresponding time aziniuth from spectrum analyzer 400.Measured signal strength signal intensity is presented on screen or the monitor according to the orientation.Therefore, each measurement can be learnt signal level measuring result and corresponding orientation simultaneously.Thereby by shows signal level measurement result and corresponding orientation thereof, the user can determine the interference level on each time aziniuth.
As mentioned above, by structure measurement shown in Figure 1 to interference signal intensity be presented on the screen of processor controls 500.Fig. 2 illustrates the interference source that measures according to the present invention and the position and the amplitude of signal respectively.As shown in Figure 2, along 360 ° of circumference measure signal interference, thereby measure signal strength signal intensity on all directions.By measuring each locational amplitude and utilizing Fig. 2 can determine signal strength signal intensity.For example, determined that the interference on the sense 10 and 20 is the strongest, because the amplitude maximum on these directions.Therefore, can reach a conclusion, on sense 10 and 20, have interference source.
Fig. 3 illustrates the flow chart that the present invention determines the position of interference source and the method for the intensity of measuring the interference signal of being sent by this interference source.Measured information can be used to correctly determine to place the position of base station in cellular system, in this position, the interference shadow that the base station is subjected to is to minimum.This method comprises the steps: to receive at least one external signal (S10) by directive antenna; Amplify received signal (S20) by low noise amplifier with predetermined gain; Analyze amplifying signal (S30) by spectrum analyzer; With recently represent analytic signal with interference radiating way-power level.
Best, this method also comprises the steps: to drive directive antenna rotation (S50) by independent whirligig and independent control device; Be transformed into orientation/time relationship with rotary speed, and measure the signal strength signal intensity (S60) on each time aziniuth this directive antenna.Best, utilizing interference radiating way-power level recently to represent in the step of analytic signal the overlapping result of expression, and no matter measuring period how.
Therefore, the invention provides the apparatus and method that a kind of definite position of interference source is also measured the signal strength signal intensity of the interference signal of being sent by interference source.The instruction that this device sends according to processor controls adopts motor to drive the directive antenna rotation.By the information about the most weak and strong jamming direction and interference signal amplitude under 360 ° of circumference is provided, apparatus and method of the present invention can be used to determine at the during the design of cellular mobile telecommunication system the position of base station.
Although embodiment is described in detail with exemplary forms with reference to accompanying drawing, the present invention can have various forms of improvement and replacement.Be understandable that, can not limit the present invention to disclosed particular form, on the contrary, the present invention covers all improvement, equivalent and the replacement that falls into the spirit and scope of the present invention that limited by claims.
Claims (20)
1. be used for the device that definite position of interference source is also measured at least one signal characteristic of at least one external signal of being sent by this interference source in a cellular mobile telecommunication system, described device comprises:
Antenna is used to detect described at least one external signal;
Motor is used to drive described antenna rotation;
Low noise amplifier, be used for to by described antenna detection to described at least one external signal amplify;
Spectrum analyzer is used to measure described at least one signal characteristic of amplifying signal; With
Processor controls is used to control described motor and described spectrum analyzer.
2. device as claimed in claim 1, wherein said antenna is a directive antenna.
3. device as claimed in claim 1, wherein said antenna are the YAGI antennas.
4. device as claimed in claim 1, wherein said antenna has narrow beam width.
5. device as claimed in claim 1, wherein said motor is scheduled to the anglec of rotation according to the beamwidth of antenna with described antenna rotation, and sends the information of the relevant anglec of rotation to described processor controls.
6. device as claimed in claim 1, wherein said processor controls are determined the orientation/time relationship with respect to described motor, and obtain at least measurement result on corresponding time aziniuth of described at least one signal characteristic from described spectrum analyzer.
7. device as claimed in claim 6, wherein said processor controls will be presented on the screen in measurement result on corresponding time aziniuth at least.
8. device as claimed in claim 7, wherein said screen display be described at least measurement result of described at least one signal characteristic of the position of interference source and described at least one external signal.
9. device as claimed in claim 1, wherein said at least one signal characteristic comprises the amplitude of described at least one external signal.
10. device as claimed in claim 1, the gain of wherein said low noise amplifier is greater than 35dB.
11. device as claimed in claim 1, wherein said motor is a stepping motor.
Also measure the method for at least one signal characteristic of at least one external signal of being sent by this interference source 12. be used for determining position of interference source in the cellular mobile telecommunication system, described method comprises the steps:
Receive described at least one external signal by directive antenna by the driven by motor rotation;
By low noise amplifier received external signal is amplified;
Analyze amplifying signal by spectrum analyzer; With
Analytic signal is presented on the screen, wherein said screen display be at least measurement result of described at least one signal characteristic of the position of interference source and described at least one external signal.
13. method as claimed in claim 12, wherein said analytic signal recently shows with interference radiating way-power level.
14. method as claimed in claim 12, wherein said method also comprises the steps:
The rotary speed of described directive antenna is transformed into orientation/time relationship; With
Described at least one signal characteristic of measurement analytic signal on corresponding time aziniuth.
15. method as claimed in claim 12, the gain of wherein said low noise amplifier is greater than 35dB.
16. method as claimed in claim 13, wherein said with analytic signal be presented at step on the screen comprise show overlapping result and no matter measuring period step how.
17. method as claimed in claim 12, wherein said at least one signal characteristic comprises the amplitude of described at least one external signal.
Also measure the device of at least one signal characteristic of at least one external signal of being sent by this interference source 18. be used for determining position of interference source in the cellular mobile telecommunication system, described device comprises:
Be used to detect the checkout gear of described at least one external signal;
Be used to drive the whirligig of described checkout gear rotation;
Be used for the amplifying device that amplifies by detected described at least one external signal of described checkout gear;
Be used to measure the measurement mechanism of described at least one signal characteristic of amplifying signal; With
Be used to control the control device of described whirligig and described measurement mechanism.
19. device as claimed in claim 18, wherein said checkout gear is a directive antenna.
20. device as claimed in claim 19, wherein said whirligig rotates predetermined angular according to the beamwidth of antenna with described antenna, and sends the information of the relevant anglec of rotation to described control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99108545A CN1241885A (en) | 1998-07-01 | 1999-06-29 | Apparatus and method for determining location of interference source and for measuring interference signal emitted therefrom |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR26411/1998 | 1998-07-01 | ||
| CN99108545A CN1241885A (en) | 1998-07-01 | 1999-06-29 | Apparatus and method for determining location of interference source and for measuring interference signal emitted therefrom |
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| CN1241885A true CN1241885A (en) | 2000-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN99108545A Pending CN1241885A (en) | 1998-07-01 | 1999-06-29 | Apparatus and method for determining location of interference source and for measuring interference signal emitted therefrom |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004055529A1 (en) * | 2002-12-16 | 2004-07-01 | Wei Wu | Emi measuring method and its system |
| CN100417046C (en) * | 2001-12-06 | 2008-09-03 | 波音公司 | Method and apparatus using transmit sequential lobing for identifying an interfering mobile terminal |
| CN102955077A (en) * | 2012-11-08 | 2013-03-06 | 广东省环境辐射监测中心 | Anti-interference measuring system and method for space distribution of environmental-electromagnetic radiation of mobile communication base station |
| CN103926494A (en) * | 2014-04-30 | 2014-07-16 | 国家电网公司 | Interference source determining method and device |
| CN104934708A (en) * | 2015-05-13 | 2015-09-23 | 国家电网公司 | High gain directional aerial directional accurate adjusting device and high gain directional aerial directional adjusting method |
| CN107533131A (en) * | 2015-04-06 | 2018-01-02 | 德克萨斯仪器股份有限公司 | Interference Detection in frequency modulation continuous wave (FMCW) radar system |
| CN109089311A (en) * | 2018-08-09 | 2018-12-25 | 广州瀚信通信科技股份有限公司 | A kind of external interference source positioning system |
| WO2023155094A1 (en) * | 2022-02-17 | 2023-08-24 | 北京航空航天大学 | Reference station, control center, interference source determination method, and interference source detection system and method |
-
1999
- 1999-06-29 CN CN99108545A patent/CN1241885A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417046C (en) * | 2001-12-06 | 2008-09-03 | 波音公司 | Method and apparatus using transmit sequential lobing for identifying an interfering mobile terminal |
| WO2004055529A1 (en) * | 2002-12-16 | 2004-07-01 | Wei Wu | Emi measuring method and its system |
| CN102955077A (en) * | 2012-11-08 | 2013-03-06 | 广东省环境辐射监测中心 | Anti-interference measuring system and method for space distribution of environmental-electromagnetic radiation of mobile communication base station |
| CN102955077B (en) * | 2012-11-08 | 2014-08-06 | 广东省环境辐射监测中心 | Anti-interference measuring system and method for space distribution of environmental-electromagnetic radiation of mobile communication base station |
| CN103926494A (en) * | 2014-04-30 | 2014-07-16 | 国家电网公司 | Interference source determining method and device |
| CN107533131A (en) * | 2015-04-06 | 2018-01-02 | 德克萨斯仪器股份有限公司 | Interference Detection in frequency modulation continuous wave (FMCW) radar system |
| CN107533131B (en) * | 2015-04-06 | 2021-09-03 | 德克萨斯仪器股份有限公司 | Interference detection in Frequency Modulated Continuous Wave (FMCW) radar systems |
| US11137476B2 (en) | 2015-04-06 | 2021-10-05 | Texas Instruments Incorporated | Interference detection in a frequency modulated continuous wave (FMCW) radar system |
| CN104934708A (en) * | 2015-05-13 | 2015-09-23 | 国家电网公司 | High gain directional aerial directional accurate adjusting device and high gain directional aerial directional adjusting method |
| CN104934708B (en) * | 2015-05-13 | 2018-04-24 | 国家电网公司 | Adjust the method that gain directional antenna is directed toward |
| CN109089311A (en) * | 2018-08-09 | 2018-12-25 | 广州瀚信通信科技股份有限公司 | A kind of external interference source positioning system |
| WO2023155094A1 (en) * | 2022-02-17 | 2023-08-24 | 北京航空航天大学 | Reference station, control center, interference source determination method, and interference source detection system and method |
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