A 5G signal interference troubleshooting method

Abstract

This invention discloses a method for troubleshooting 5G signal interference, belonging to the field of 5G technology. The method first acquires 5G signals in the air interface and synchronizes them using the PBCH channel; secondly, it separates the uplink and downlink signals after synchronization; thirdly, it monitors the spectrum of the GP signal in real time and calculates the signal power; if the signal power shows a significant increase, interference is considered to exist; finally, it uses a directional antenna to determine the direction of the interfering signal. This invention can capture interference signals in the 5G air interface, providing a reference for operators to troubleshoot interference.

Description

Technical Field

[0001] This invention belongs to the field of 5G technology, specifically relating to a method for troubleshooting 5G signal interference. Background Technology

[0002] In 5G integrated network deployment, operators need to analyze the 5G signal coverage within cells to plan a reasonable network layout. As is well known, system capacity is highly susceptible to external interference signals. Therefore, the location of interference sources must be estimated for investigation and elimination. This paper analyzes 5G signals to achieve signal synchronization and uses the strength of interference signals to determine their location. Summary of the Invention

[0003] In view of the above-mentioned technical problems existing in the prior art, the present invention proposes a 5G signal interference investigation method, which is reasonably designed, overcomes the shortcomings of the prior art, and has good effect.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A method for troubleshooting 5G signal interference includes the following steps:

[0006] Step 1: At location A, collect 5G air interface signals, use the PBCH channel for downlink synchronization, and separate uplink and downlink signals after synchronization;

[0007] Step 2: Perform FFT operation on the time-domain signal in GP to obtain the corresponding spectrum, monitor the spectrum in real time, and calculate the power P;

[0008] Step 3: Change the direction of the directional antenna to determine the direction θ1 of the interference source, and obtain the straight line l1;

[0009] Step 4: Change the position of the measurement point, denoted as B, and repeat steps 1-3 to obtain the direction θ2 of the new interference source, thus obtaining the straight line l2;

[0010] Step 5: The intersection of lines l1 and l2 is the location of the interference source.

[0011] Preferably, step 1 specifically includes the following steps:

[0012] Step 1.1: Use the PBCH signal to perform downlink synchronization and obtain the synchronized signal;

[0013]

[0014] Where r(k) is the time-domain signal at the receiving end, and t(m) is the local sequence, t * (m) represents the conjugate operation with respect to t(m), and N is the number of FFT points; Si (k) The result of conjugate multiplication of the received signal and the local sequence;

[0015] Step 1.2: Based on the corresponding uplink and downlink time slot configuration, separate the uplink and downlink signals after synchronization. The time domain signal between uplink and downlink is the GP segment signal.

[0016] Preferably, in step 2, the expression for power P is as follows;

[0017]

[0018] Where, r θ This represents the received signal at an angle of θ, where m is the time-domain sampling point and N is the number of sampling points for the received signal.

[0019] Preferably, step 3 specifically includes the following steps:

[0020] Step 3.1: At position A, continuously change the direction of the directional antenna, and select the direction θ1 with the maximum value of P as the interference source;

[0021]

[0022] Step 3.2: Based on the coordinates of the measurement point A(x1,y1) and the direction θ1 of the interference source, obtain the straight line l1;

[0023] y = y1 + (x - x1)tanθ1 (4).

[0024] Preferably, step 4 specifically includes the following steps:

[0025] Step 4.1: At position B, continuously change the direction of the directional antenna, and select the direction θ2, which is the maximum value of P, as the direction of the interference source;

[0026] Step 4.2: Determine the straight line l2 based on the coordinates B(x2,y2) of the measurement point and the direction θ2 of the interference source.

[0027] y = y² + (x - x²)tanθ² (5);

[0028] Where tan is the tangent operation, x is the x-coordinate of the interference source to be determined, and y is the y-coordinate of the interference source to be determined.

[0029] The beneficial technical effects of this invention are as follows:

[0030] The method disclosed in this invention is based on a 5G signal processing platform and proposes a 5G signal interference investigation method, which solves the problem of interference source location estimation in 5G technology. Attached Figure Description

[0031] Figure 1This is a schematic diagram illustrating the methods for troubleshooting 5G signal interference. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0033] like Figure 1 As shown, a method for troubleshooting 5G signal interference includes the following steps:

[0034] Step 1: Collect 5G air interface signals at location A, perform downlink synchronization using the PBCH channel to obtain the synchronized signal; separate uplink and downlink signals according to the corresponding uplink and downlink time slot configuration, where the time domain signal between uplink and downlink is the GP segment signal; specifically including the following steps:

[0035] Step 1.1: Use the PBCH signal to perform downlink synchronization and obtain the synchronized signal;

[0036]

[0037] Where r(k) is the time-domain signal at the receiving end, and t(m) is the local sequence, t * (m) represents the conjugate operation with respect to t(m), and N is the number of FFT points; S i (k) The result of conjugate multiplication of the received signal and the local sequence;

[0038] Step 1.2: Based on the corresponding uplink and downlink time slot configuration, separate the uplink and downlink signals after synchronization. The time domain signal between uplink and downlink is the GP segment signal.

[0039] Step 2: Perform FFT on the time-domain signal within the GP to obtain the corresponding spectrum, and calculate the power P; if the power shows a significant increase, interference is considered to exist; the specific details are as follows:

[0040] Perform FFT on the time-domain signal within GP to obtain the corresponding spectrum, and calculate the power P;

[0041]

[0042] Where, r θ This represents the received signal at an angle of θ, where m is the time-domain sampling point and N is the number of sampling points for the received signal.

[0043] Step 3: Change the direction of the directional antenna to determine the direction θ1 of the interference source, and obtain the straight line l1;

[0044] Step 3.1: At position A, continuously change the direction of the directional antenna, and select the direction θ1 with the maximum value of P as the interference source;

[0045]

[0046] Step 3.2: Based on the coordinates of the measurement point A(x1,y1) and the direction θ1 of the interference source, obtain the straight line l1;

[0047] y = y1 + (x - x1)tanθ1 (4).

[0048] Step 4: Change the position of the measurement point, denoted as B, and repeat steps 1-3 to obtain the direction θ2 of the new interference source, thus obtaining the straight line l2;

[0049] Specifically, the following steps are included:

[0050] Step 4.1: At position B, continuously change the direction of the directional antenna, and select the direction θ2, which is the maximum value of P, as the direction of the interference source;

[0051] Step 4.2: Determine the straight line l2 based on the coordinates B(x2,y2) of the measurement point and the direction θ2 of the interference source.

[0052] y = y² + (x - x²)tanθ² (5).

[0053] Step 5: The intersection of lines l1 and l2 is the location of the interference source.

[0054] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A method for troubleshooting 5G signal interference, characterized in that: Includes the following steps: Step 1: At location A, collect 5G air interface signals, use the PBCH channel for downlink synchronization, and separate uplink and downlink signals after synchronization; Step 2: Calculate the power P of the time-domain signal within the GP, and perform FFT operation on the time-domain signal within the GP to obtain the corresponding spectrum, and monitor the spectrum in real time; Step 3: Change the direction of the directional antenna to determine the direction of the interference source. To obtain a straight line ; Step 4: Change the position of the measurement point, denoted as B, and repeat steps 1-3 to obtain the direction of the new interference source. To obtain a straight line ; Step 5: Straight Line and The intersection point is the location of the interference source; Step 1 specifically includes the following steps: Step 1.1: Use the PBCH signal to perform downlink synchronization and obtain the synchronized signal; (1)； in, The received time-domain signal is given by [the signal name]. For local sequences, To Take the conjugate operation, where M is the number of FFT points; The result of multiplying the received signal by the local sequence using the conjugate; Step 1.2: According to the corresponding uplink and downlink time slot configuration, separate the uplink and downlink signals after synchronization, where the time domain signal between uplink and downlink is the GP segment signal; In step 2, power The expression is as follows; (2)； in, The angle value represents The received signal at time, where n is the time-domain sampling point and N is the number of sampling points of the received signal; Step 3 specifically includes the following steps: Step 3.1: At position A, continuously change the direction of the directional antenna to select... The maximum value points in the direction of the interference source. ; (3)； Step 3.2: Based on the coordinates A of the measurement point Points and the direction of interference sources To obtain a straight line ; (4)； Step 4 specifically includes the following steps: Step 4.1: At position B, continuously change the direction of the directional antenna to select... The maximum value points in the direction of the interference source. ; Step 4.2: Based on the coordinates B of the measurement point and the direction of the interference source Determine the line : (5)； in, For tangent operation, Let x be the x-coordinate of the interference source to be determined. The ordinate of the interference source to be determined.

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