TWI716295B - Degree measurement system and degree measurement method of antenna of base station - Google Patents

Abstract

A degree measurement system and a degree measurement method of the antenna of the base station are provided. In the method, a signal measurement equipment is moved vertically at multiple specific measurement positions in front of the main beam of the antenna, and multiple measured values respectively are recorded. An estimated azimuth, an estimated downward inclination summation, a final mechanical downward inclinations, and a final electrical downward inclination are determined, respectively, according to differences with corresponding signal strength theoretical values. The summation of a mechanical downward inclinations and an electrical downward inclination in each combination is the estimated downward inclination summation. Accordingly, proper downward inclinations and azimuth can be estimated automatically, so as to guarantee human safety.

Description

Angle measurement system and angle measurement method of base station antenna

The present invention relates to an antenna adjustment technology, and more particularly to an angle measurement system and an angle measurement method of a base station antenna.

When the base station is performing antenna construction, the traditional method requires construction personnel to attach to the antenna to measure the signal. In some construction sites, personal safety is challenged urgently.

In view of this, the embodiments of the present invention provide an angle measurement system and an angle measurement method of a base station antenna, which can automatically move a signal measurement device to a fixed point for measurement, thereby ensuring the safety of personnel.

The method for measuring the angle of the base station antenna of the embodiment of the present invention includes (but is not limited to) the following steps: controlling the signal measuring device to move vertically at the first measurement point in front of the main beam of the base station antenna and recording several first quantities Measured value. The estimated azimuth angle is determined according to the difference between the first measured value and the first signal strength theoretical value corresponding to the several azimuth angles. Control the signal measuring device to move vertically at the second measuring point corresponding to the estimated azimuth angle and record several second measured values. The sum of the estimated downtilt angles is determined based on the difference between those second measured values and the theoretical values of the second signal strengths corresponding to several mechanical tilt angles. Control the signal measurement device to move vertically at a third measurement point other than the estimated azimuth angle and record a number of third measurement values. The final electronic tilt angle and the final mechanical tilt angle of the base station antenna are determined based on the difference between the third measured value and the third signal strength theoretical value corresponding to several combinations of different electronic tilt angles and different mechanical tilt angles. Among them, the sum of the electronic tilt angle and the mechanical tilt angle in each combination is the sum of the estimated down tilt angle.

The angle measurement system of the embodiment of the present invention includes (but is not limited to) a base station antenna, a signal measurement device, a mobile mechanism, and a main control device. The signal measurement equipment is used to measure the signal strength of the base station antenna. The moving mechanism is used to drive the signal measuring equipment to move. The main control device is configured to control the moving mechanism and make the signal measurement equipment move vertically at the first measurement point in front of the main beam of the base station antenna and record a number of first measurement values, based on those first measurement values and The difference between the theoretical values of the first signal strength corresponding to several azimuth angles determines the estimated azimuth angle, controls the moving mechanism and makes the signal measurement device move vertically at the second measurement point corresponding to the estimated azimuth angle and record several The second measurement value is determined based on the difference between the second measurement value and the theoretical value of the second signal strength corresponding to several mechanical inclination angles to determine the sum of the estimated downward inclination angles, control the moving mechanism and make the signal measurement equipment estimate The third measurement point other than the azimuth angle is moved vertically and several third measurement values are recorded, and the third signal strength theoretical values corresponding to those third measurement values and the combinations of different electronic tilt angles and different mechanical tilt angles respectively The difference between determines the final electronic tilt angle and the final mechanical tilt angle of the base station antenna. Among them, the sum of the electronic tilt angle and the mechanical tilt angle in each combination is the sum of the estimated down tilt angle.

Based on the above, the angle measurement system and the angle measurement method of the base station antenna of the embodiment of the present invention automatically control the signal measurement equipment to move to several heights on the three measurement points and further measure the antenna emission. Signal strength. In addition, based on the difference between the measured value and the theoretical value, the most suitable antenna azimuth, electronic tilt and mechanical tilt are estimated in sequence. In this way, the measurement efficiency can be improved and personnel hazards can be avoided.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

FIG. 1 is a schematic diagram of an angle measurement system 10 according to an embodiment of the invention. Please refer to FIG. 1, the angle measurement system 10 includes (but is not limited to) a base station antenna 11, a signal measurement device 12, a moving mechanism 13 and a main control device 14.

The base station antenna 11 is used for applications such as Home Evolved Node B (HeNB), eNB, next-generation node B (gNB), base transceiver system (Base Transceiver System, BTS), and relay (relay) , Or repeater (repeater) and other types of antennas of base stations. In one embodiment, the base station antenna 11 is configured with an initial electronic tilt angle θe and a mechanical tilt angle θm (refer to the figure for illustration). In some embodiments, the base station antenna 11 may be deployed on the roof of a building, a high tower, or other locations.

2A to 2D are radiation pattern diagrams according to an embodiment of the invention. Please refer to Figures 2A and 2B for the radiation pattern using a two-dimensional section. Figure 2A shows the radiation pattern of the base station antenna 11 in the vertical direction (configuration is the initial electron inclination angle θe), and Figure 2B shows Shown is the radiation field pattern of the base station antenna 11 in the horizontal direction (configuration is the initial electron inclination angle θe). Please refer to Figure 2C and Figure 2D for the three-dimensional view of the radiation field pattern. The radiation intensity can be measured in the anechoic chamber. Figure 2C shows the radiation field pattern of the base station antenna 11 in the three-dimensional space (configuration is the initial electron inclination θe), and Fig. 2D shows the radiation pattern in the three-dimensional space received by the signal strength measuring device. Assume that the measurement conditions in Figure 2D are that the drone is equipped with mobile network signal strength measurement equipment (for example, engineering model mobile phones, spectrum analyzers, etc.), and the antenna gain and radiation field type are measured in an anechoic chamber. .

The signal measurement device 12 may be a mobile phone, a tablet computer, a mobile phone, a tablet computer, and a mobile communication module that support third-generation (3G), fourth-generation (4G), fifth-generation (5G) or later generation mobile communication standards. Or a notebook computer, it can also be an electromagnetic wave intensity meter or a wireless signal detection instrument such as an antenna and a spectrum analyzer. In one embodiment, the signal measuring device 12 is used to measure the (received) signal strength radiated by the base station antenna 11.

The moving mechanism 13 can be an unmanned aerial vehicle, a robotic arm, a multi-degree-of-freedom mechanism, a height adjustment platform, a slide rail, a turntable, a screw, a motor, or a cylinder, etc., various types of mechanical components that can drive the connection element to move or rotate, or a combination thereof / Drive the signal measuring device 12 to lift, move and/or rotate.

The main control device 14 may be an electronic device such as a mobile phone, a tablet computer, a desktop computer, a notebook computer, a server, etc., including components such as a CPU, a memory, etc. to perform arithmetic functions, and a wired or wireless communication transceiver to communicate with the base station. The station antenna 11, the mobile mechanism 13, and/or the signal measurement equipment 12 communicate. In some embodiments, the main control device 14 may be integrated with the signal measuring device 12 and/or the moving mechanism 13 into an independent device.

In order to facilitate the understanding of the operation process of the present invention, a number of embodiments will be described below in detail. Hereinafter, the method according to the embodiment of the present invention will be described in conjunction with the devices, components and modules of the angle measurement system 10 in FIG. 1. Each process of the method can be adjusted accordingly according to the implementation situation, and is not limited to this.

FIG. 3 is a flowchart of a method for measuring the angle of a base station antenna 11 according to an embodiment of the present invention. 3, the main control device 14 controls the moving mechanism 13 and makes the signal measurement device 12 move vertically at the first measurement point in front of the main beam of the base station antenna 11 and record a number of first measurement values (step S310) . Specifically, the main control device 14 can send instructions to the moving mechanism 13, and the moving mechanism 13 can move the signal measuring device 12 to a fixed point according to the instructions.

4A is a top view of a measurement point according to an embodiment of the invention. Please refer to FIG. 4A, assuming that the base station antenna 11 is set in the box in the figure, N is true north, Φ _i represents the i-th azimuth angle, the serial number i is a positive integer from 1 to L, and the value L is a positive integer. The asterisks in the figure indicate measurement points where the signal measurement device 12 is located. The moving mechanism 13 is controlled to move to a predefined azimuth angle (for example, the azimuth angle corresponding to the first measurement point). In addition, the moving mechanism 13 is controlled to move vertically (for example, the drone can take off and land vertically, but the embodiment of the present invention does not limit the movement of the moving mechanism 13) to move the signal measuring device 12 to a specific height. On the other hand, when the signal measuring device 12 moves to a designated position, the signal strength of the wireless signal (that is, the first measured value, for example, Reference Signal Receiving Power (RSRP) or other strengths) will be measured. Instructions), and combine these signal strengths with corresponding height information and send them to the main control device 14.

The main control device 14 can determine the estimated azimuth based on the difference between the first measurement value obtained at different heights and the first signal strength theoretical values corresponding to the azimuth angles corresponding to the first measurement point ( Step S320). Specifically, FIG. 4B is a flowchart of a method for determining an estimated azimuth angle according to an embodiment of the present invention. 4B, the main control device 14 uses the initial electronic tilt angle θe value and the mechanical tilt angle θm value recorded by the network management system to calculate the signal of L different azimuth angles (ie, the first azimuth angle Φ ₁ ~ the Lth azimuth angle Φ _L ) The difference between the theoretical intensity value and the first measured value determines the estimated antenna azimuth angle Φest. The main control device 14 has ascertained the geographic location (for example, GPS latitude and longitude information) and the height of the ground surface of the base station antenna 11 to be tested, and has ascertained the antenna characteristics of the base station antenna 11 such as antenna gain, radiation pattern, and wireless signal transmission power . In addition, the main control device 14 can ascertain the receiving antenna gain and radiation field pattern after the signal measurement device 12 and the moving mechanism 13 are combined. The main control device 14 can record the signal strength measurement value, geographic location, ground height, and azimuth angle information of the signal measurement device 12 relative to the aforementioned true north N in the mobile network during the movement. It is worth noting that the main control device 14 can use other known base station transmit power, free space radio wave propagation loss, and wireless system signal strength formula principles to calculate the antenna fixed at a certain electronic tilt angle θe, mechanical The theoretical value of the signal strength at any point in the air under the combination of the inclination angle θm and the azimuth angle, and under the line of sight (LOS) propagation condition in the air interface.

Refer to 4B for the detailed calculation process. The main control device 14 theoretically calculates the theoretical value of the first signal strength corresponding to a certain azimuth angle (ie, the signal strength corresponding to the combination of the initial electronic tilt angle θe, the mechanical tilt angle θm, and the i-th azimuth angle Φ _i Theoretical value) and compare the difference E1 with the first measured value (step S410) to determine whether the difference E1 of the i-th azimuth angle Φ _i is smaller than the minimum difference ME1 (it can be the difference E1 of the first azimuth angle Φ ₁ initially, and After the subsequent comparison, the size is replaced with the smallest one) (step S420). Wherein, the difference E1 may be a Root Mean Square (RMS) value, a Least Square (LS) value or a value obtained by other error minimization algorithms. If it is not less than the minimum difference ME1, the main control device 14 determines whether the serial number i is greater than the value L (step S440). If the serial number i is still not greater than the value L, the main control device 14 switches to the first theoretical value of signal strength corresponding to the next azimuth angle (step S450), and returns to step S410. If it is less than the minimum difference ME1, the main control device 14 temporarily determines the currently calculated azimuth as the estimated azimuth (step S430). After all the azimuth angles are evaluated, the main control device 14 can use the last tentative estimated azimuth angle as the final estimated azimuth angle (step S460) (that is, the azimuth angle corresponding to the smallest difference among those azimuth angles is used as the estimated azimuth angle). Measure the azimuth).

Figure 4C is an example of a measurement comparison diagram. 4C, taking RSRP as an example, compared with the measured value 401, the theoretical value 403 of the second azimuth angle Φ ₂ corresponds to the difference compared to the theoretical value 402 of the first and third azimuth angles Φ ₁ , Φ ₃ , 404 corresponds to a smaller difference, so as to determine the most appropriate estimated azimuth Φest as the second azimuth Φ ₂ .

After the estimated azimuth angle Φest is determined, the main control device 14 controls the moving mechanism 13 and causes the signal measuring device 12 to move vertically at the second measurement point corresponding to the estimated azimuth angle Φest, and records a number of second measurement values (step S330 ). Specifically, similarly, the moving mechanism 13 is controlled to move the signal measurement device 12 to the second measurement point corresponding to the estimated azimuth angle Φest, and vertically lift to move the signal measurement device 12 to a specific height. Fig. 5A is a side view of a second measurement point according to an embodiment of the invention. Please refer to Figure 5A, Θ _{sum_j} represents the total of the j-th downtilt angle (the sum of the electronic tilt angle and the mechanical tilt angle is the (estimated) total downtilt angle, where the electronic tilt angle is the initial value here), and the number j is a positive integer from 1 to M, And the value M is a positive integer. That is, M different mechanical inclination angles.

On the other hand, when the signal measurement device 12 moves to the designated second measurement point (ie, the position along the line to estimate the azimuth angle Φest, refer to FIG. 4A), the signal strength of the wireless signal (ie, The second measurement value), and the signal strength is combined with the height information and sent to the main control device 14 respectively.

The main control device 14 may determine the total estimated downtilt angle according to the difference between the second measured values and the theoretical values of the second signal strength corresponding to the several mechanical tilt angles (step S340). Specifically, FIG. 5B is a flowchart of a method for determining a downtilt angle estimation according to an embodiment of the present invention. Referring to FIG. 5B, the main control device 14 uses the recorded initial electronic inclination angle θe value and the estimated azimuth angle _φest value to calculate different mechanical inclination angles θm (corresponding to the first downtilt angle sum Θ _{sum_1} to the M _{th downtilt} angle sum Θ _{sum_M} The difference between the theoretical value of signal strength and the measured value of) determines the sum of estimated downtilt angles Θ _{sum_est} . The main control device 14 can calculate the theoretical value of the signal strength at any point in the air when the antenna is fixed at a certain combination of the electronic inclination angle θe, the mechanical inclination angle θm, and the azimuth angle, as well as the air interface line of sight (LOS) propagation condition.

Refer to 5B for the detailed calculation process. The main control device 14 theoretically calculates the theoretical value of the second signal intensity corresponding to a certain mechanical inclination angle (or the sum of all downtilt angles) (ie, the combination of the initial electronic inclination angle θe and the j-th downtilt angle sum θ _{sum_j} And compare the difference E2 with the second measured value (step S510) to determine whether the difference E2 of the j-th downtilt angle sum Θ _{sum_j} is smaller than the minimum difference ME2 (the initial can be the first downtilt angle sum Θ _{sum_1} The difference E2 is replaced with the smallest one after the subsequent comparison) (step S520). Wherein, the difference E2 can be a root mean square (RMS) value, a least square (LS) value or a value obtained by other error minimization algorithms. If it is not less than the minimum difference ME2, the main control device 14 determines whether the serial number j is less than the value M (step S540). If the serial number j is still less than the value M, the main control device 14 changes to the second theoretical value of the signal strength corresponding to the next mechanical tilt (step S550), and returns to the step S510. If it is less than the minimum difference ME2, the main control device 14 tentatively determines the total downtilt angle currently calculated as the total estimated downtilt angle (step S530). After all the total downtilt angles are evaluated, the main control device 14 can use the last tentatively estimated total downtilt angle as the final estimated downtilt angle total (step S560) (that is, the corresponding difference among those total downtilt angles is minimized The total downtilt angle is used as the total estimated downtilt angle).

Figure 5C is an example of a measurement comparison diagram. Referring to Figure 5C, taking RSRP as an example, compared with the measured value 501, the theoretical value 503 of the second sum of downtilt angles Θ _{sum_2} corresponds to the difference compared to the theoretical value of the first and third downtilt angles Θ _{sum_1} , Θ _{sum_3} The values 502 and 504 correspond to smaller differences, so that the most appropriate estimated downtilt angle sum Θ _{sum_est} is _determined as the second downtilt angle sum Θ _{sum_2} .

After deciding to estimate the sum of the downward inclination angle Θ _{sum_est} , the main control device 14 controls the moving mechanism 13 and causes the signal measuring device 12 to move vertically at the third measurement point corresponding to the estimated azimuth angle Φest and record several third measurement values (Step S350). Specifically, similarly, the moving mechanism 13 is controlled to move the signal measuring device 12 to another azimuth angle other than the estimated azimuth angle Φest, and vertically lift to move the signal measuring device 12 to a specific height. In one embodiment, the azimuth angle difference between the second measurement point and the third measurement point is within 30 degrees. For example, the azimuth angle corresponding to the third measurement point is the estimated azimuth angle Φest minus 30 degrees. In other embodiments, the azimuth difference between the two measurement points may be other angles.

Fig. 6A is a side view of a third measuring point according to an embodiment of the invention. Please refer to Figure 6A, the mechanical inclination angle θm_k represents the k-th lower mechanical inclination angle (the value of the estimated down inclination angle minus the electronic inclination angle, where the electronic inclination angle is a variable value here), the serial number k is a positive integer from 1 to O, and the value is O Is a positive integer. That is, O different mechanical inclination angles and electronic inclination angles to form a plurality of combinations, but the sum of the two values is fixed at the estimated downward inclination angle Θ _{sum_est} .

On the other hand, when the signal measurement device 12 moves to the designated third measurement point (ie, the estimated azimuth angle Φest minus the position along the azimuth angle of the specific angle, refer to FIG. 4A), it will measure the wireless The signal strength of the signal (that is, the third measured value) is combined with the corresponding height information and sent to the main control device 14 respectively.

The main control device 14 can determine the final electronic tilt angle of the base station antenna 11 based on the difference between the third signal strength theoretical values corresponding to a number of third measurement values and a number of combinations (respectively formed by different mechanical tilt angles and electronic tilt angles) And the final mechanical tilt (step S360). Specifically, FIG. 6B is a flowchart of a method for determining the final electronic tilt angle and the final mechanical tilt angle according to an embodiment of the present invention. 6B, the main control device 14 uses the azimuth angle corresponding to the third measurement point to calculate the difference between the theoretical value of the signal strength of different mechanical inclination angles θm and different electronic inclination angles θe and the third measured value to determine the final electronic inclination angle and the final Mechanical inclination. The main control device 14 can calculate the theoretical value of the signal strength at any point in the air when the antenna is fixed at a certain combination of the electronic inclination angle θe, the mechanical inclination angle θm, and the azimuth angle, as well as the air interface line of sight (LOS) propagation condition.

Refer to 6B for the detailed calculation process. The main control device 14 theoretically calculates the third signal corresponding to a certain combination (ie, the kth mechanical inclination angle θm_k, a certain electronic inclination angle θe (estimated downtilt angle sum θ _{sum_est} minus the kth mechanical inclination angle θm_k) The theoretical value of strength, which can be corrected by the rotation of the polar coordinate system) and compare the difference E3 with the third measured value (step S610), and judge whether the difference E3 of the kth combination is smaller than the minimum difference ME3 (it can be the first combination initially The difference E1 is replaced with the smallest one after subsequent comparison of the size) (step S620). Wherein, the difference E3 can be a root mean square (RMS) value, a least square (LS) value or a value obtained by other error minimization algorithms. If it is not smaller than the minimum difference ME3, the main control device 14 determines whether the sequence number k is smaller than the value O (step S640). If the sequence number k is still less than the value 0, the main control device 14 changes to the third theoretical value of the signal strength corresponding to the combination of the next mechanical tilt (step S650), and returns to the step S610. If it is less than the minimum difference ME3, the main control device 14 tentatively determines the currently calculated combination as the final electronic tilt angle and the final mechanical tilt angle (step S630). After all the mechanical inclination angles are evaluated, the main control device 14 can determine the final tentative final electronic inclination angle and the final mechanical inclination angle respectively as the final electronic inclination angle and the final mechanical inclination angle (step S660) (that is, the corresponding difference in those combinations is the minimum value The electronic inclination angle and mechanical inclination angle are respectively regarded as the final electronic inclination angle and the final mechanical inclination angle).

Fig. 6C is an example of a comparison diagram illustrating signal strength coverage. Please refer to FIG. 6C, there is a large signal strength coverage difference between the electronic tilt angle of 10 degrees and the mechanical tilt angle of 10 degrees at the third measurement point, so the final combination of the antenna electronic tilt angle θe and the mechanical tilt angle θm can be found.

7A to 7E are examples of comparison diagrams illustrating different downtilt angles (for mechanical tilt angles). Referring to FIGS. 7A to 7E, the difference between the theoretical value 702, 712, 722, 742, 762 and the measured value 701 corresponding to different downtilt angles may be different, and the main control device 14 may select the smallest difference from these differences.

In summary, the angle measurement system and the angle measurement method of the base station antenna of the embodiment of the present invention include the following features:

The embodiment of the present invention allows the measurement of the downtilt angle and azimuth angle of the base station antenna without allowing practitioners to enter the roof of the base station address and board the base station antenna tower or roof. Effective measurement can be achieved under sufficient LOS conditions. Measure the downward tilt and azimuth of the antenna. For many base station antennas where measurement is difficult and inconvenient, the measurement efficiency is greatly improved.

When measuring downtilt and azimuth angles with traditional simple angle measuring instruments or mobile phone applications (APP), there are errors in accuracy, especially when the base station antenna is deployed in a position that is dangerous for measurement, or due to The limited space for measurement operation makes the accuracy error larger. However, the embodiment of the present invention can obtain consistent accuracy.

When the base station is in an area that is more sensitive to residents' struggle, it is impossible to enter the base station address antenna for measurement in a traditional way, the embodiment of the present invention brings the possibility of measurement.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

10: Angle measurement system 11: Base station antenna 12: Signal measurement equipment 13: Mobile mechanism 14: Main control device S310~S360, S410~S460, S510~S560, S610~S660: Step N: True North Φ _i : The i-th azimuth angle i, j, k: serial number L, M, O: numerical value Φest: estimated antenna azimuth angle E1~E3: difference ME1~ME3: minimum difference 401, 501, 701: measured value 402~404, 502 ~504, 702, 712, 722, 742, 762: theoretical value Θ _{sum_j} : sum of j-th downtilt angle Θ _{sum_est} : estimated sum of down-tilt angle θm_k: k-th mechanical inclination angle

FIG. 1 is a schematic diagram of an angle measurement system according to an embodiment of the invention. 2A to 2D are radiation pattern diagrams according to an embodiment of the invention. 3 is a flowchart of a method for measuring the angle of a base station antenna according to an embodiment of the present invention. 4A is a top view of a measurement point according to an embodiment of the invention. 4B is a flowchart of a method for determining an estimated azimuth angle according to an embodiment of the present invention. Figure 4C is an example of a measurement comparison diagram. Fig. 5A is a side view of a second measurement point according to an embodiment of the invention. 5B is a flowchart of a method for determining a downtilt angle estimation according to an embodiment of the present invention. Figure 5C is an example of a measurement comparison diagram. Fig. 6A is a side view of a third measuring point according to an embodiment of the invention. 6B is a flowchart of a method for determining the final electronic tilt angle and the final mechanical tilt angle according to an embodiment of the present invention. Fig. 6C is an example of a comparison diagram illustrating signal strength coverage. 7A to 7E are examples of comparison diagrams illustrating different downtilt angles.

S310~S360: steps

Claims (10)

A method for measuring the angle of a base station antenna includes: Controlling a signal measurement device to move vertically at a first measurement point in front of the main beam of a base station antenna and record a plurality of first measurement values; Determine an estimated azimuth angle according to the difference between the first measured values and the first signal strength theoretical values corresponding to the multiple azimuth angles; Controlling the signal measurement device to move vertically at a second measurement point corresponding to the estimated azimuth angle and record a plurality of second measurement values; Determine a total estimated downtilt angle based on the difference between the second measured values and the theoretical values of the second signal strength corresponding to the multiple mechanical tilt angles; Controlling the signal measuring device to move vertically at a third measuring point other than the estimated azimuth angle and recording a plurality of third measuring values; and A final electronic tilt angle and a final mechanical tilt angle of the base station antenna are determined according to the difference between the third measurement values and the third signal strength theoretical values corresponding to multiple combinations of different electronic tilt angles and different mechanical tilt angles, where The sum of the electronic tilt angle and the mechanical tilt angle in each combination is the sum of the estimated down tilt angle. The method for measuring the angle of a base station antenna according to claim 1, wherein the estimated azimuth angle is determined based on the difference between the first measured values and the theoretical values of the first signal strengths respectively corresponding to the azimuth angles. The steps include: One of the azimuth angles corresponding to the minimum difference is used as the estimated azimuth angle. The method for measuring the angle of a base station antenna according to claim 1, wherein the sum of the estimated downtilt angles is determined according to the difference between the second measured values and the theoretical values of the second signal strengths respectively corresponding to the mechanical tilt angles The steps include: The sum of the mechanical inclination angle and a preset electronic inclination angle corresponding to the minimum difference among the mechanical inclination angles is taken as the sum of the estimated downward inclination angles. The angle measurement method of a base station antenna according to claim 1, wherein the combinations of the third measurement values and different electronic tilt angles and different mechanical tilt angles respectively correspond to the difference between the theoretical values of the third signal strength The steps of determining the final electronic tilt angle and the final mechanical tilt angle of the base station antenna include: The electronic inclination angle and the mechanical inclination angle corresponding to the minimum difference among the combinations are used as the final electronic inclination angle and the final mechanical inclination angle, respectively. The method for measuring the angle of a base station antenna according to claim 1, wherein the azimuth angle difference between the second measurement point and the third measurement point is within 30 degrees. An angle measurement system, including: A base station antenna; A signal measuring device for measuring the signal strength of the base station antenna; A moving mechanism for driving the signal measuring equipment to move; and A master control device configured to execute: Controlling the moving mechanism and causing the signal measurement device to move vertically at a first measurement point in front of the main beam of a base station antenna and record multiple first measurement values; Determine an estimated azimuth angle according to the difference between the first measured values and the first signal strength theoretical values corresponding to the multiple azimuth angles; Controlling the moving mechanism and causing the signal measuring device to move vertically at a second measuring point corresponding to the estimated azimuth angle, and recording a plurality of second measured values; Determine a total estimated downtilt angle based on the difference between the second measured values and the theoretical values of the second signal strength corresponding to the multiple mechanical tilt angles; Controlling the moving mechanism and causing the signal measuring device to move vertically at a third measuring point other than the estimated azimuth angle, and recording a plurality of third measuring values; and A final electronic tilt angle and a final mechanical tilt angle of the base station antenna are determined according to the difference between the third measurement values and the third signal strength theoretical values corresponding to multiple combinations of different electronic tilt angles and different mechanical tilt angles, where The sum of the electronic tilt angle and the mechanical tilt angle in each combination is the sum of the estimated down tilt angle. The angle measurement system according to claim 6, wherein the main control device is further configured to execute: One of the azimuth angles corresponding to the minimum difference is used as the estimated azimuth angle. The angle measurement system according to claim 6, wherein the main control device is further configured to execute: The sum of the mechanical inclination angle and a preset electronic inclination angle corresponding to the minimum difference among the mechanical inclination angles is taken as the sum of the estimated downward inclination angles. The angle measurement system according to claim 6, wherein the main control device is further configured to execute: The electronic inclination angle and the mechanical inclination angle corresponding to the minimum difference among the combinations are used as the final electronic inclination angle and the final mechanical inclination angle, respectively. The angle measurement system according to claim 6, wherein the azimuth angle difference between the second measurement point and the third measurement point is within 30 degrees.

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