CN102186202A - An interference source positioning system and method - Google Patents

Abstract

The invention discloses an interference source positioning system, comprising: an antenna receiving module, used for receiving uplink signals; a radio frequency module, used for down-converting the uplink signals for the first time; The uplink signal after the first frequency conversion is converted into a digital signal and then down-converted for the second time; the digital processing module is used to perform digital down-conversion on the uplink signal, and divide the uplink signal into several sub-frequency bands; perform channel calibration on the uplink signal, if If the calibration is passed, the sub-band signal after the third frequency conversion is collected; and the collected signal is sent to the control module; the control module is used to receive the collected signal and upload the collected signal to the data analysis module; a data analysis module, which is used to analyze the collected signal to obtain the azimuth and power of the interference source. The invention also discloses a method for locating the interference source, which improves the accuracy of locating the interference source.

Description

An interference source location system and method

technical field

The present invention relates to the field of communication technology, in particular to an interference source locating system and method.

Background technique

With the rapid development of wireless technology in recent years, new applications based on wireless technology continue to increase, and interference sources often appear within the coverage of cellular networks. Wireless network interference can be divided into uplink interference and downlink interference. In order to ensure normal telecommunication services, it is technically necessary to determine the characteristics and location of interference sources and take countermeasures to improve network quality.

An uplink interference detection method is proposed in the prior art: the base station receives the downlink interference detection result reported by the terminal; the downlink interference result is the detection result of the terminal to the downlink interference signal of the neighbor base station; the base station determines that the terminal is the neighbor base station according to the detection result sources of uplink interference.

However, the interference source location accuracy of this uplink interference detection method is not high.

Contents of the invention

The invention discloses an interference source positioning system and method, and the interference source system and method provided by the invention can improve the accuracy of interference source positioning.

An interference source locating system, comprising:

An antenna receiving module, configured to receive uplink signals;

A radio frequency module, configured to down-convert the uplink signal for the first time; convert the frequency of the uplink signal to an intermediate frequency;

An ADC conversion module, configured to convert the uplink signal after the first frequency conversion in the radio frequency module into a digital signal and perform a second downconversion; convert the frequency of the uplink signal to a baseband frequency;

A digital processing module, configured to perform a third down-conversion on the uplink signal after the second frequency conversion in the ADC module, divide the uplink signal into several sub-frequency bands; perform channel calibration on the uplink signal, If the calibration is passed, signal acquisition is performed on the sub-band signal after the third frequency conversion; and the acquired signal is sent to the control module;

The control module is configured to receive the collected signal and upload the collected signal to a data analysis module;

The data analysis module is configured to analyze the collected signal to obtain the azimuth and power of the interference source.

The invention also discloses a method for locating an interference source, including:

(1) Receive the uplink signal through the antenna;

(2) performing the first down-conversion on the uplink signal; converting the frequency of the uplink signal to an intermediate frequency;

(3) converting the uplink signal after the first frequency conversion into a digital signal and performing a second downconversion; converting the frequency of the uplink signal to a baseband frequency;

(4) performing a third down-conversion on the uplink signal that has been down-converted for the second time, and dividing the uplink signal into several sub-frequency bands;

(5) performing channel calibration on the uplink signal, and if the calibration is passed, performing signal acquisition on the sub-band signal after the third frequency conversion;

(6) Analyze the collected signal to obtain the azimuth and power of the interference source.

In the present invention, the uplink signal is down-converted three times, and the signal frequency is converted into a baseband frequency suitable for collection. The channel calibration of the uplink signal is carried out through the digital processing module. The relative bearing and power of the source; the positioning accuracy of the interference source is improved through channel calibration.

Description of drawings

Fig. 1 is a schematic diagram of an embodiment of the system of the present invention;

Fig. 2 is a schematic diagram of an embodiment of the method of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings, but it is not intended to limit the present invention.

With reference to Fig. 1, system of the present invention comprises: antenna receiving module 101, radio frequency module 102, ADC conversion module 103, digital processing module 104, control module 105 and data processing module 106; Wherein ADC (Analog-to-Digital Converter, analog/digital converter);

An antenna receiving module 101, configured to receive uplink signals;

A radio frequency module 102, configured to perform down-conversion of the uplink signal for the first time; convert the frequency of the uplink signal to an intermediate frequency;

The ADC conversion module 103 is used to convert the uplink signal after the first frequency conversion in the radio frequency module 102 into a digital signal and perform the second downconversion; the frequency of the uplink signal is converted to a baseband frequency;

The digital processing module 104 is used to perform a third down-conversion on the uplink signal after the second frequency conversion in the ADC module, and divide the uplink signal into several sub-frequency bands; perform channel calibration on the uplink signal, and if the calibration passes, the Collecting the sub-band signals after the third frequency conversion; and sending the collected signals to the control module 105;

The control module 105 is configured to receive the collected signal and upload the collected signal to the analysis module 106;

The data analysis module 106 is configured to analyze the collected signals to obtain the azimuth and power of the interference source.

In the present invention, the uplink signal is down-converted three times first, the signal frequency is converted into a baseband frequency suitable for collection, and the channel calibration of the uplink signal is performed. Only through calibration can the uplink signal be allowed to pass through, and the relative orientation of the interference source can be obtained through signal collection and signal analysis. and power; the positioning accuracy of interference sources is improved through channel calibration.

The channel calibration in the embodiment in Fig. 1 includes: delay calibration, amplitude calibration and phase calibration.

The collection method can be to collect according to the set sampling frequency point or to collect according to the default sampling frequency point.

Further improvement to FIG. 1: the mobile antenna receiving module 101 receives uplink signals at two different locations, the uplink signal at the first location is received at the first location, and the uplink signal at the second location is received at the second location; the data analysis module 106 Analyze the uplink signals received at two different locations, analyze the uplink signal at the first location to obtain the azimuth and power of the first interference source, and analyze the uplink signal at the second location to obtain the azimuth and power of the second interference source;

The azimuth and power of the first interference source and the azimuth and power of the second interference source are analyzed to confirm the specific location and power of the interference source.

By analyzing the uplink signals received at different locations, the relative azimuth and power of the two interference source signals can be obtained, and the specific location of the interference source can be determined more accurately by using the principle that two non-parallel straight lines must intersect at one point.

The embodiment of Fig. 1 may also include a step: if the calibration of the uplink signal channel fails, the data processing module 104 is also used to judge whether the number of failures exceeds the set threshold, if so, then end the acquisition; if not, then continue the channel calibration A step of.

Introduce the inventive method below, with reference to Fig. 2, comprise the following steps:

201. Receive an uplink signal;

Receive uplink signals through the antenna.

202, 2 down conversions;

Perform the first down-conversion of the uplink signal; convert the frequency of the uplink signal to an intermediate frequency;

The uplink signal after the first frequency conversion is converted into a digital signal and the second down-conversion is performed to convert the frequency of the uplink signal to a baseband frequency.

203. Digital down-conversion, channel calibration and signal acquisition;

Perform digital down-conversion on the uplink signal after the second down-conversion, and divide the uplink signal into several sub-bands; perform channel calibration on the uplink signal, and if the calibration passes, perform signal acquisition on the sub-band signal after the third down-conversion .

204. Signal analysis.

Analyze the collected signal to get the azimuth and power of the interference source.

In the present invention, the uplink signal is down-converted three times first, the signal frequency is converted into a baseband frequency suitable for collection, and the channel calibration of the uplink signal is performed. Only through calibration can the uplink signal be allowed to pass through, and the relative orientation of the interference source can be obtained through signal collection and signal analysis. and power; the positioning accuracy of interference sources is improved through channel calibration.

The channel calibration in the embodiment in Fig. 2 includes: delay calibration, amplitude calibration and phase calibration.

The collection method can be to collect according to the set sampling frequency point or to collect according to the default sampling frequency point.

Further improvements to Figure 2:

Receive the uplink signal at two different locations by moving the antenna; receive the uplink signal at the first location at the first location, receive the uplink signal at the second location at the second location, and analyze the uplink signal at the first location to get the first interference source azimuth and power and analyzing the uplink signal at the second location to obtain the azimuth and power of the second interference source;

The azimuth and power of the first interference source and the position and power of the second interference source are analyzed to confirm the specific location and power of the interference source.

In order to improve the reliability, the embodiment in Fig. 2 may also include a step: if the uplink signal calibration channel fails, then judge whether the number of failures exceeds the set threshold, if so, end the acquisition; if not, continue the process of channel calibration step.

The embodiments of the present invention described above are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims (10)

1. an interference source navigation system is characterized in that, comprising:

The antenna receiver module is used to receive upward signal;

Radio-frequency module is used for described upward signal is carried out the down-conversion first time; The frequency of described upward signal is converted to intermediate frequency;

The ADC modular converter is used for the described upward signal after the frequency conversion for the first time of described radio-frequency module process is converted to digital signal and carries out the down-conversion second time; The frequency of described upward signal is converted to base band frequency;

Digital signal processing module is used for the described upward signal after the frequency conversion for the second time of described ADC module process is carried out down-conversion for the third time, and described upward signal is divided into the experimental process frequency range; Described upward signal is carried out calibrate, pass through if calibrate, then to carrying out signals collecting through the described frequency sub-band signal after the frequency conversion for the third time; And the signal that collects sent to control module;

Described control module is used to receive the described signal that collects and the described signal that collects is uploaded to data analysis module;

Described data analysis module is used for the described signal analysis that collects is obtained the orientation and the power of interference source.

2. interference source navigation system according to claim 1 is characterized in that,

Described calibrate comprises: time delay calibration, amplitude calibration and phase alignment.

3. interference source navigation system according to claim 1 is characterized in that,

Described collection comprises: gather or gather according to the sampling frequency of acquiescence according to the sampling frequency of setting.

4. interference source navigation system according to claim 1 is characterized in that,

Described upward signal comprises primary importance upward signal and second place upward signal; Described primary importance upward signal and described second place upward signal are the upward signals that receives at 2 diverse locations;

The orientation and the power of described interference source comprise: the orientation and the power of the orientation of first interference source and power and second interference source; Analysis obtains to described primary importance upward signal for the orientation of described first interference source and power; Analysis obtains to described second place upward signal for the orientation of described second interference source and power;

Described data analysis module also is used for the orientation of described first interference source and the orientation and the power of power and described second interference source are analyzed, and confirms the particular location of interference source.

5. according to each described interference source navigation system of claim 1 to 4, it is characterized in that,

Described data processing module is used to also judge whether the number of times that calibrate does not pass through surpasses the threshold values of setting, if then finish to gather; If not, then continue the step of described calibrate.

6. an interference source localization method is characterized in that, comprising:

(1) receives upward signal by antenna;

(2) described upward signal is carried out the down-conversion first time; The frequency of described upward signal is converted to intermediate frequency;

(3) to converting digital signal to and carry out the down-conversion second time through the described upward signal after the frequency conversion for the first time; The frequency of described upward signal is converted to base band frequency;

(4) the described upward signal to the process down-conversion second time carries out down-conversion for the third time, and described upward signal is divided into the experimental process frequency range;

(5) described upward signal is carried out calibrate, pass through if calibrate, then to carrying out signals collecting through the frequency sub-band signal after the frequency conversion for the third time;

(6) the signal analysis that collects is obtained the orientation and the power of interference source.

7. interference source localization method according to claim 6 is characterized in that,

Described calibrate comprises: time delay calibration, amplitude calibration and phase alignment.

8. interference source localization method according to claim 6 is characterized in that,

Described collection comprises: gather or gather according to the sampling frequency of acquiescence according to the sampling frequency of setting.

9. interference source localization method according to claim 6 is characterized in that,

In described step (1), receive the primary importance upward signal by moving described antenna in primary importance, receive second place upward signal in the second place;

In described step (6), analysis obtains the orientation and the power of first interference source to described primary importance upward signal, and analysis obtains the orientation and the power of second interference source to described second place upward signal;

Comprise that also step (7) analyzes the orientation of described first interference source and the orientation and the power of power and described second interference source, confirm the particular location and the power of interference source.

10. according to each described interference source localization method of claim 6 to 9, it is characterized in that,

If calibrate does not pass through, judge then whether number of pass times does not surpass the threshold values of setting, if then finish to gather; If not, then continue the step of described calibrate.

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