CN112994714B - Method and device for automatically adjusting antenna to receive strongest base station signal - Google Patents
Method and device for automatically adjusting antenna to receive strongest base station signal Download PDFInfo
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- CN112994714B CN112994714B CN202110267427.8A CN202110267427A CN112994714B CN 112994714 B CN112994714 B CN 112994714B CN 202110267427 A CN202110267427 A CN 202110267427A CN 112994714 B CN112994714 B CN 112994714B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method and a device for automatically adjusting the antenna to receive the strongest base station signal, the method adjusts different antenna directions and phases according to different vectors, the antenna receives 5G signals on the basis of each antenna direction and phase, a signal processing unit demodulates the received 5G signals to calculate EVM, and the EVM is used as the basis to evaluate the quality of the signals received by the receiving antenna and select the optimal signals. The invention can effectively position and track a plurality of signals to dynamically minimize interference, maximize the expected signal reception, effectively control the coverage range, and solve the problems of poor accuracy of manual adjustment, long time consumption of adjustment, low efficiency and difficult manual adjustment in individual scenes. The algorithm of the invention is simple and easy to realize.
Description
Technical Field
The invention belongs to the field of information communication, and particularly relates to a method and a device for automatically adjusting an antenna to receive a strongest base station signal.
Background
With the advent of the 5G era, 5G network coverage became more and more extensive. However, in some scenarios, the signal attenuation is large, so that the coverage intensity is not enough, and the user cannot have a good 5G experience. Under the condition, a 5G repeater system needs to be loaded, so that a blind area can be covered, and the cost is not increased too much.
An antenna of a conventional repeater system for receiving a base station signal is a fixed direction confirmed according to a current air interface signal environment when equipment is installed, but when the direction or the phase of an external field base station signal changes, the repeater antenna is unchanged, the received signal strength is weakened, and the coverage effect is deteriorated; meanwhile, the antenna reception signal is interfered by various non-useful signals, and the reception quality is deteriorated.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned deficiencies, and providing a method and an apparatus for automatically adjusting an antenna to receive a strongest base station signal, which can suppress interference signals and enhance the strength of a desired received signal.
In order to achieve the above object, a method for automatically adjusting the antenna to receive the strongest base station signal includes the following steps:
s1, continuously measuring the position and the direction of the antenna, and continuously receiving the 5G signal of the base station;
s2, taking the antenna direction information as a first control vector;
s3, analyzing the 5G signal, calculating a corresponding EVM value according to the 5G signal, and generating a new control vector;
s4, adjusting the direction and phase of the antenna according to the new control vector;
s5, storing the current first control vector and the EVM of the demodulation signal as a group of corresponding parameters;
s6, repeating S2 to S5 until the variation range between the first control vector and the EVM of the demodulation signal is smaller than a set threshold value;
and S7, repeating the steps from S1 to S6 for a plurality of times, and selecting an optimal value as a network selection control result.
The antenna control vector table includes direction and phase parameters.
In S3, an adaptive signal processing algorithm is used to determine the adaptive weight of the EVM value, and a new control vector is generated based on the adaptive weight of the EVM value.
The specific method for calculating the corresponding EVM value according to the 5G signal and generating a new control vector is as follows:
s31, converting the analog-to-digital of the 5G radio frequency signal received by the antenna, mixing the complex number, sampling and filtering to generate I and Q signals;
s32, comparing the difference value of the absolute amplitude and the absolute phase of the I, Q signal and an ideal signal, wherein the ideal signal is the ideal I, Q signal of the standard 256QAM modulation waveform;
s33, on the basis of the current control vector, adopting a gradient optimization algorithm to respectively adjust the antenna to the eight horizontal directions in small steps, testing evm in a local area, and taking the control vector corresponding to the minimum evm value as a local optimal control vector as a result of the large step search;
and S34, according to the result of the previous step, making large step adjustment to the optimal direction, producing a new control vector, and performing the next signal search.
A system for automatically adjusting the antenna to receive the strongest base station signal comprises a base station signal access antenna, an antenna control unit, a signal processing unit and an antenna automatic adjusting device;
the antenna automatic adjusting device is used for measuring and adjusting the position and the direction of the antenna;
the antenna control unit is used for controlling the receiving direction and the phase of the antenna and sending the information of the direction and the phase of the antenna to the signal processing unit;
the base station signal access antenna is used for receiving a 5G signal sent by a base station and sending the 5G signal to the signal processing unit through the coupler;
the signal processing unit is used for analyzing and calculating the EVM of the current received signal and correcting the control command of the antenna control unit.
The antenna automatic adjusting device is fixed on the side surface of the antenna.
Compared with the prior art, the method adjusts different antenna directions and phases according to different vectors, receives 5G signals by the antenna on the basis of each antenna direction and phase, demodulates and calculates the EVM by the signal processing unit according to the received 5G signals, evaluates the quality of the signals received by the receiving antenna by taking the EVM as a basis, and selects the optimal signals. The invention can effectively position and track a plurality of signals to dynamically minimize interference, maximize the expected signal reception, effectively control the coverage range, and solve the problems of poor accuracy of manual adjustment, long time consumption of adjustment, low efficiency and difficult manual adjustment in individual scenes. The algorithm of the invention is simple and easy to realize.
The system of the invention adds an antenna control unit to improve the coverage and reduce the interference and other problems. The receiving unit receives the 5G signal from the base station, the transmitting unit transmits the 5G signal from the base station to a user, and the signal processing unit performs the control function of uplink and downlink transmitting power and the control of automatic adjustment of the antenna. The receiving unit couples and sends the 5G signal from the base station to the signal processing unit, the signal processing unit analyzes according to the identified signal power, calculates the system EVM, generates a group of control vectors, sends the control vectors to the antenna control unit, and adjusts the antenna direction and the phase, so that the final antenna direction and the phase tend to the optimal state of the repeater system EVM. The invention realizes the purpose of improving the quality of the received signal on the circuit hardware level based on a software algorithm.
Drawings
FIG. 1 is a schematic view of a coverage area of the present invention;
FIG. 2 is a flow chart of the present invention;
FIG. 3 is a system diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 3, the present invention includes a base station signal access antenna, an antenna control unit, a signal processing unit, and an antenna automatic adjusting device;
the automatic antenna adjusting device is fixed on the side surface of the antenna and used for measuring and adjusting the position and the direction of the antenna;
the antenna control unit is used for controlling the receiving direction and the phase of the antenna and sending the information of the direction and the phase of the antenna to the signal processing unit;
the base station signal access antenna is used for receiving a 5G signal sent by a base station and sending the 5G signal to the signal processing unit through the coupler;
the signal processing unit is used for analyzing and calculating the EVM of the current received signal and correcting the control command of the antenna control unit.
Referring to fig. 2, the present invention comprises the steps of:
step one, when the equipment is powered on or reset, the signal processing unit initializes an antenna control vector table, and the vector table comprises direction and phase parameters.
And step two, the antenna control unit sends the direction information measured by the automatic antenna adjusting device to the signal processing unit, the signal processing unit transmits the received antenna direction information to the antenna control unit as a first control vector, and the antenna control unit sets the receiving direction and the phase of the receiving antenna of the repeater according to the control vector.
And step three, the signal processing unit analyzes the 5G signal, calculates a corresponding EVM value according to the 5G signal, takes the EVM value as an adjusting criterion, determines adaptive weighting through an adaptive signal processing algorithm, generates a new control vector, and sends the new control vector to the antenna control unit, so that the antenna direction tends to the communication direction of the signal with higher gain, and meanwhile, the greater inhibition is formed in the direction of the interference signal.
And step four, storing the control vector of the current antenna and the EVM of the demodulation signal as a group of corresponding parameters.
And step five, the antenna control unit adjusts the direction and the phase of the antenna according to the updated control vector, and repeats the step two to the step four until the variation range of the control vector is smaller than the set threshold.
And step six, polling for three times according to the steps from the step two to the step five, taking weighted average, finally, taking the weight W corresponding to the EVM minimum value as an optimal value by the signal processing unit, sending the optimal value to the antenna control unit, and adjusting the direction and the phase of the antenna by the control unit according to the optimal value to be used as a final result of the current network selection. And when the equipment is powered on, reset or the EVM value is larger than a certain set value, implementing the network selection step.
The specific method for calculating the corresponding EVM value according to the 5G signal and generating a new control vector is as follows:
firstly, performing analog-to-digital conversion, complex mixing and sampling filtering on a 5G radio frequency signal received by an antenna to generate an I signal and a Q signal;
secondly, comparing the difference value of the absolute amplitude and the absolute phase of the I and Q signals with an ideal signal, wherein the ideal signal is an ideal I and Q signal of a standard 256QAM modulation waveform;
thirdly, on the basis of the current control vector, adopting a gradient optimization algorithm, respectively adjusting the antenna in eight horizontal directions in small steps, testing evm in a local area, and taking the control vector corresponding to the minimum evm value as a local optimal control vector as a result of the large step search;
and fourthly, according to the result of the previous step, performing large-step adjustment in the optimal direction, producing a new control vector and performing next signal search.
Claims (5)
1. A method for automatically adjusting an antenna to receive a strongest base station signal, comprising the steps of:
s1, continuously measuring the position and the direction of the antenna, and continuously receiving the 5G signal of the base station;
s2, taking the antenna direction information as a first control vector;
s3, analyzing the 5G signal, calculating a corresponding EVM value according to the 5G signal, and generating a new control vector; the specific method comprises the following steps:
s31, converting the analog-to-digital of the 5G radio frequency signal received by the antenna, mixing the complex number, sampling and filtering to generate I and Q signals;
s32, comparing the difference value of the absolute amplitude and the absolute phase of the I, Q signal and an ideal signal, wherein the ideal signal is the ideal I, Q signal of the standard 256QAM modulation waveform;
s33, on the basis of the current control vector, adopting a gradient optimization algorithm to respectively adjust the antenna to the eight horizontal directions in small steps, testing evm in a local area, and taking the control vector corresponding to the minimum evm value as a local optimal control vector as a result of the large step search;
s34, according to the result of the previous step, making large step adjustment to the optimal direction, producing a new control vector, and performing the next signal search;
s4, adjusting the direction and phase of the antenna according to the new control vector;
s5, storing the current first control vector and the EVM of the demodulation signal as a group of corresponding parameters;
s6, repeating S2 to S5 until the variation range between the first control vector and the EVM of the demodulation signal is smaller than a set threshold value;
and S7, repeating the steps from S1 to S6 for a plurality of times, and selecting an optimal value as a network selection control result.
2. The method of claim 1 wherein the antenna control vector table includes direction and phase parameters.
3. The method of claim 1, wherein in S3, an adaptive signal processing algorithm is used to determine the adaptive weight of the EVM value, and a new control vector is generated according to the adaptive weight of the EVM value.
4. A system based on the method for automatically adjusting antenna to receive strongest base station signal of claim 1, comprising base station signal access antenna, antenna control unit, signal processing unit and antenna automatic adjusting device;
the antenna automatic adjusting device is used for measuring and adjusting the position and the direction of the antenna;
the antenna control unit is used for controlling the receiving direction and the phase of the antenna and sending the information of the direction and the phase of the antenna to the signal processing unit;
the base station signal access antenna is used for receiving a 5G signal sent by a base station and sending the 5G signal to the signal processing unit through the coupler;
the signal processing unit is used for analyzing and calculating the EVM of the current received signal and correcting the control command of the antenna control unit.
5. The system according to claim 4, wherein the antenna automatic adjusting device is fixed on the side of the antenna.
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| CN101499861A (en) * | 2008-02-02 | 2009-08-05 | 大唐移动通信设备有限公司 | Measuring method and apparatus for error vector amplitude |
| CN102377499A (en) * | 2011-11-14 | 2012-03-14 | 深圳市海思半导体有限公司 | Digital signal error vector magnitude testing method, digital signal error vector magnitude testing device and digital signal error vector magnitude testing system |
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| CN102857304B (en) * | 2011-06-28 | 2016-08-03 | 中兴通讯股份有限公司 | Error Vector Magnitude determines method and device, signal transmitter |
| CN102739328B (en) * | 2012-06-18 | 2014-08-27 | 航天恒星科技有限公司 | Error vector magnitude measurement device and method for satellite mobile communication terminal |
| US10382076B2 (en) * | 2017-10-13 | 2019-08-13 | Anritsu Corporation | Antenna device and measurement method |
| CN110098856B (en) * | 2018-01-31 | 2021-06-22 | 华为技术有限公司 | Antenna device and related equipment |
| CN110868736B (en) * | 2018-08-27 | 2022-08-19 | 中兴通讯股份有限公司 | Base station test method, device, system and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499861A (en) * | 2008-02-02 | 2009-08-05 | 大唐移动通信设备有限公司 | Measuring method and apparatus for error vector amplitude |
| CN102377499A (en) * | 2011-11-14 | 2012-03-14 | 深圳市海思半导体有限公司 | Digital signal error vector magnitude testing method, digital signal error vector magnitude testing device and digital signal error vector magnitude testing system |
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