CN113871875A - Method, device and terminal for automatically aligning over-the-horizon wireless communication system antenna - Google Patents
Method, device and terminal for automatically aligning over-the-horizon wireless communication system antenna Download PDFInfo
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Abstract
The invention provides a method, a device and a terminal for automatically aligning an antenna of a beyond-the-horizon wireless communication system. The method comprises the following steps: the main control end antenna determines an initial azimuth angle of a home end according to longitude and latitude of an opposite end, measures signal strength through a single carrier signal at the corresponding initial azimuth angle, adopts a first pitch angle for pre-scanning, determines an antenna coarse alignment angle according to the received single carrier signal strength, adopts a second pitch angle for fine scanning simultaneously through synchronous signal interaction on an established communication control link, and determines an antenna fine alignment angle according to the measurement of a signal median of the received synchronous signal. The invention can get rid of the dependence on an elevation map, reduces the requirement on a storage space, has strong portability, and utilizes the median of the received signal to carry out coarse alignment and fine alignment of the antenna angle in stages, thereby realizing the accurate measurement of the median of the received signal under the condition of a fading channel and realizing accurate and reliable automatic alignment of the antenna.
Description
Technical Field
The invention relates to the technical field of antenna alignment, in particular to a method, a device and a terminal for automatically aligning an antenna of a beyond-the-horizon wireless communication system.
Background
The transmission channel of the over-the-horizon wireless communication system generally has fading characteristics, and parameters such as fading rate and fading depth are related to a plurality of factors such as transmission distance, working frequency and climate environment. The starting of the over-the-horizon wireless directional communication system generally plans an initial position and a pitching angle through an elevation map, and fine adjustment is carried out on the basis of the planned initial position and the planned pitching angle when the over-the-horizon wireless directional communication system is started so as to achieve the optimal communication effect.
However, in the prior art, when the over-the-horizon wireless communication system is switched on, the elevation map is highly dependent, so that the requirement on storage space is high, the transportability is poor, and the alignment precision of the manual antenna is low.
Disclosure of Invention
The embodiment of the invention provides a method, a device and a terminal for automatically aligning an antenna of an beyond-the-horizon wireless communication system, which aim to solve the problems of high requirement on the time alignment storage space of the antenna, poor transportability and low precision in the prior art.
In a first aspect, an embodiment of the present invention provides a method for automatically aligning an antenna of an over-the-horizon wireless communication system, where a main control antenna and a subordinate control antenna are opposite-end antennas, and the aligning of the antenna of the over-the-horizon wireless communication system includes:
the main control terminal antenna and the subordinate control terminal antenna respectively determine an initial azimuth angle of a home terminal according to the longitude and latitude of an opposite terminal and the longitude and latitude of the home terminal, and control the home terminal antenna to turn to the determined initial azimuth angle;
the main control end antenna and the subordinate control end antenna carry out signal strength detection through single carrier signals at corresponding initial azimuth angles, meanwhile, a first pitching angle is adopted for pre-scanning, according to the strength of the received single carrier signals, the rough alignment angle of the antenna is determined, and a communication control link is started to be established;
after the main control end antenna and the subordinate control end antenna complete initial synchronization, the main control end antenna and the subordinate control end antenna interact through a synchronization signal on the communication control link, meanwhile, a second pitching angle fine scanning is adopted, and an antenna fine alignment angle is determined according to the measurement of a signal median of the received synchronization signal; the second pitch angle search range is smaller than the first pitch angle search range.
In a possible implementation manner, the determining, by the master control-end antenna and the subordinate control-end antenna, an initial azimuth of the home terminal according to the longitude and latitude of the peer end, and controlling the home terminal antenna to turn to the determined initial azimuth respectively includes:
the main control end antenna and the subordinate control end antenna respectively obtain longitude and latitude height information and direction angle information of the local end according to respective positioning and directional Beidou;
the master control end antenna and the subordinate control end antenna respectively send Beidou messages to opposite ends, and the Beidou messages comprise longitude and latitude height information of a local end;
after the master control end antenna and the subordinate control end antenna respectively receive the Beidou messages of the opposite end, the initial azimuth angle of the local end is calculated according to the longitude and latitude height information of the opposite end, the longitude and latitude height information of the local end and the azimuth angle information of the local end;
and the main control end antenna and the subordinate control end antenna respectively control the local end antenna controller to rotate the antenna direction to the initial azimuth corresponding to the local end.
In a possible implementation manner, the performing, by the master control end antenna and the subordinate control end antenna, signal strength detection through a single carrier signal at a corresponding initial azimuth, and meanwhile performing prescan by using a first pitch angle, determining a coarse alignment angle of the antenna according to a comparison between received single carrier signal strengths, and starting to establish a communication control link includes:
the main control end antenna sends a first single carrier signal to the subordinate control end antenna and scans by adopting a first pitch angle, and meanwhile, the subordinate control end antenna scans by adopting the first pitch angle and searches the first single carrier signal;
if the subordinate control end antenna captures the first single carrier signal, carrying out frequency calibration;
the subordinate control end antenna stops scanning after the frequency calibration is finished, and a second single carrier signal is sent to the main control end antenna;
and if the main control end antenna captures the second single carrier signal, performing frequency calibration, stopping scanning after the frequency calibration is completed, and sending a synchronization signal to the subordinate control end antenna to realize the initial synchronization of the main control end antenna and the subordinate control end antenna and start to establish a communication control link.
In a possible implementation manner, when the main control end antenna sends a first single carrier signal to the subordinate control end antenna and performs first elevation angle pre-scanning, the residence time of the main control end antenna at each stagnation point is the time of adopting the first elevation angle pre-scanning for one period by the subordinate control end antenna;
when the subordinate control end antenna performs first pitching angle pre-scanning and searches the first single carrier signal, the residence time of the subordinate control end antenna at each residence point is 1/n of the residence time of the main control end antenna at each residence point, and n represents the number of residence points of the subordinate control end antenna for the first pitching angle pre-scanning.
In a possible implementation manner, after the subordinate control end antenna stops scanning after the frequency calibration is completed, and sends a second single carrier signal to the master control end antenna, the method further includes:
setting a timeout time;
and when the subordinate control end antenna does not receive the synchronous signal sent by the main control end antenna within the overtime time, skipping to the subordinate control end antenna to perform the first pitching angle pre-scanning and searching the first single carrier signal.
In a possible implementation manner, after the main control end antenna and the subordinate control end antenna at corresponding initial azimuth angles, performing signal strength detection through a single carrier signal, and meanwhile, adopting a first pitch angle for pre-scanning, determining an antenna coarse alignment angle according to a comparison between received single carrier signal strengths, and starting to establish a communication control link, the method further includes:
the master control end antenna sends a timing instruction to the subordinate control end antenna, wherein the timing instruction comprises timing time;
after receiving the timing instruction, the subordinate control end antenna feeds back to the main control end antenna;
and respectively resetting a circulating second timer when the time correction time of the main control end antenna and the subordinate control end antenna is reached.
In a possible implementation manner, after the initial synchronization of the main control-end antenna and the subordinate control-end antenna is completed, the main control-end antenna and the subordinate control-end antenna interact with each other through a synchronization signal on the communication control link, and meanwhile, a second fine pitch angle scanning is adopted to determine an antenna fine alignment angle according to a measurement of a signal median of the received synchronization signal, including:
the main control end antenna sends a pitching fine scanning instruction to the subordinate control end antenna through the communication control link and then sends a synchronous signal continuously;
after receiving the fine pitch scanning instruction, the subordinate control end antenna performs fine scanning at all stagnation points by adopting a second pitch angle, and after the scanning is finished, the position of the maximum median point of the received synchronous signals in all the stagnation points is determined as the pitch angle position of the subordinate control end antenna; wherein the second pitch angle search range is less than the first pitch angle search range;
the subordinate control end antenna is switched to the determined pitch angle position, and pitch fine scanning completion information is sent to the main control end antenna;
after receiving the fine pitch scanning completion information, the main control end antenna determines the pitch angle position of the main control end antenna in the same manner as the subordinate control end antenna determines the pitch angle position;
the main control end antenna is switched to a determined pitch angle position;
the main control end antenna and the subordinate control end antenna adopt a pitch angle position determination mode to determine an azimuth angle;
and finishing the antenna angle fine alignment after the azimuth angle is determined.
In a possible implementation manner, the determining, as the pitch angle position of the subordinate control end antenna, a position where a median maximum point of the received synchronization signals in all the stationing points is located includes:
if the median maximum point of the received synchronous signals in all the stationing points is positioned at the middle position of all the stationing points, determining the position of the median maximum point as the pitch angle position of the subordinate control end antenna;
if the maximum point of the median of the received synchronization signals in all the stationing points is located at the boundary position of all the stationing points, expanding one stationing point towards the boundary direction of all the stationing points, and comparing the expanded stationing points with the signal median of the maximum point of the median of the current signals until the determined position of the maximum point of the median of the signals is not located at the boundary position of all the stationing points, and taking the position of the maximum point of the current median as the pitch angle position of the subordinate control terminal antenna.
In a second aspect, an embodiment of the present invention provides an apparatus for automatically aligning an antenna of an beyond-visual-range wireless communication system, where a main control antenna and a subordinate control antenna are opposite-end antennas, and the apparatus for automatically aligning an antenna of an beyond-visual-range wireless communication system includes: the main control end antenna controller and the subordinate control end antenna controller;
the main control end antenna controller and the subordinate control end antenna controller are respectively used for determining an initial azimuth angle of a home terminal according to longitude and latitude of an opposite terminal and longitude and latitude of the home terminal and controlling the home terminal antenna to turn to the determined initial azimuth angle;
the main control end antenna controller and the subordinate control end antenna controller are used for carrying out signal strength detection through single carrier signals at corresponding initial azimuth angles, meanwhile adopting a first pitching angle for pre-scanning, determining an antenna coarse alignment angle according to the strength of the single carrier signals received by comparison, and starting to establish a communication control link;
the main control end antenna controller and the subordinate control end antenna controller are used for interacting through a synchronous signal on the communication control link after the main control end antenna and the subordinate control end antenna complete initial synchronization, and determining an antenna fine alignment angle according to measurement of a signal median of a received synchronous signal by adopting a second pitching angle fine scanning; the second elevation angle search range is less than the first elevation angle search range.
In a third aspect, an embodiment of the present invention provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor, when executing the computer program, implements the steps of the method for automatically aligning an antenna of a beyond-visual-range wireless communication system according to the first aspect or any possible implementation manner of the first aspect.
The embodiment of the invention provides a method, a device and a terminal for automatically aligning an antenna of an over-the-horizon wireless communication system, which are used for getting rid of the dependence of the over-the-horizon wireless directional communication system on an elevation map by adopting an initial pitch angle pre-scanning method without depending on the elevation map when the antenna is roughly aligned, reducing the requirement on a storage space, having strong portability, adopting a scanning method with smaller pitch angle intervals to carry out precise alignment by combining with the median detection of a signal at a residence point, and realizing the accurate measurement of a received signal under the condition of a fading channel, thereby realizing the accurate and reliable automatic alignment of the antenna of the over-the-horizon wireless communication system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the embodiments or drawings used in the prior art description, and obviously, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an application view of a method for automatically aligning an antenna of a beyond-the-horizon wireless communication system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for automatically aligning an antenna of a beyond-line-of-sight wireless communication system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Fig. 1 is a flowchart illustrating an implementation of a method for automatically aligning an antenna of an over-the-horizon wireless communication system according to an embodiment of the present invention, where the method includes a main control antenna and an auxiliary control antenna, where the main control antenna and the auxiliary control antenna are opposite-end antennas, and the method for automatically aligning an antenna of an over-the-horizon wireless communication system may include: the steps of coarse alignment, frequency correction, synchronization, time correction, fine alignment, initial communication verification and the like are detailed as follows:
Optionally, the coarse alignment stage includes calculating an initial azimuth angle according to the longitude and latitude of both ends of the communication. In this step, the determining, by the master control end antenna and the subordinate control end antenna, an initial azimuth of the home terminal according to the longitude and latitude of the opposite terminal and the longitude and latitude of the home terminal, and controlling the home terminal antenna to turn to the determined initial azimuth may include:
the main control end antenna and the subordinate control end antenna respectively obtain longitude and latitude height information and direction angle information of the local end according to respective positioning and directional Beidou; the master control end antenna and the subordinate control end antenna respectively send Beidou messages to the opposite end, wherein the Beidou messages comprise longitude and latitude height information of the local end; after the main control end antenna and the subordinate control end antenna respectively receive the Beidou messages of the opposite end, calculating to obtain an initial azimuth angle of the local end according to longitude and latitude height information of the opposite end, longitude and latitude height information and azimuth angle information of the local end; the main control end antenna and the subordinate control end antenna respectively control the local end antenna controller to rotate the antenna direction to the initial direction angle corresponding to the local end.
It should be noted that, in the process of transmitting the beidou message by the main control end antenna and the subordinate control end antenna, the sequence of transmitting the message is not limited, and the main control end antenna may transmit the message to the subordinate control end antenna first, or the subordinate control end antenna may transmit the message to the main control end antenna first.
And 102, detecting the signal intensity of the main control end antenna and the subordinate control end antenna at the corresponding initial azimuth angles through single carrier signals, meanwhile, adopting a first pitching angle for pre-scanning, determining the rough alignment angle of the antenna according to the intensity of the single carrier signals received by comparison, and starting to establish a communication control link.
The coarse alignment phase also includes pre-scanning the search signal through the pitch angle at both ends. And after the initial azimuth angles of the two ends are determined, the two ends respectively rotate to the determined initial azimuth positions to conduct rough alignment of the pitch angles.
Optionally, in this step, the main control end antenna and the subordinate control end antenna perform signal strength detection through a single carrier signal at the corresponding initial azimuth, and meanwhile, perform prescan by using the first elevation angle, determine a coarse alignment angle of the antenna according to the strength of the single carrier signal received by comparison, and start to establish the communication control link, which may include:
the main control end antenna sends a first single carrier signal to the subordinate control end antenna and scans by adopting a first pitching angle, and the subordinate control end antenna scans by adopting the first pitching angle and searches for the first single carrier signal; if the belonging control end antenna captures the first single carrier signal, carrying out frequency calibration; the subordinate control end antenna stops scanning after the frequency calibration is completed, and a second single carrier signal is sent to the main control end antenna; and if the main control end antenna captures the second single carrier signal, performing frequency calibration, stopping scanning after the frequency calibration is completed, and sending a synchronous signal to the subordinate control end antenna to realize the initial synchronization of the main control end antenna and the subordinate control end antenna and start to establish a communication control link.
Optionally, when the main control end antenna sends a first single carrier signal to the subordinate control end antenna and performs first pitch angle pre-scanning, the retention time of the main control end antenna at each stationing point is the time of adopting the first pitch angle to pre-scan for one period by the subordinate control end antenna, enough time is reserved for the subordinate control end antenna, so as to ensure full coverage of scanning of each stationing point of the subordinate control end antenna, prevent the first single carrier signal sent by the main control end antenna from being unsuccessfully scanned due to omission of scanning points, and ensure the success rate of signal capture.
Optionally, when the subordinate control end antenna performs the first pitch angle pre-scanning and searches for the first single carrier signal, the residence time of the subordinate control end antenna at each residence point is 1/n of the residence time of the main control end antenna at each residence point, where n represents the number of residence points of the subordinate control end antenna performing the first pitch angle pre-scanning.
It should be noted that the main control end antenna needs to send the first single carrier signal and perform prescan without interruption until the second single carrier signal sent by the subordinate control end antenna is scanned and frequency calibration is completed, and then stops sending the synchronization signal to the subordinate control end antenna to perform time domain synchronization.
The first single-carrier signal and the second single-carrier signal may be the same single-carrier signal, and the first and second signals are named as "first" and "second" herein for distinguishing the antenna end transmitting the single-carrier signal.
Optionally, the frequency calibration is a frequency calibration stage, and when the main control end antenna and the subordinate control end antenna receive a single carrier signal sent by an opposite end, the FFT transformation is performed on the received single carrier information, so as to eliminate a frequency domain error of the system caused by clock offset, and complete the frequency calibration.
Optionally, in the synchronization stage, time domain synchronization between the main control end antenna and the subordinate control end antenna is completed through the synchronization signal, so that the main control end antenna and the subordinate control end antenna can establish a basic communication control link.
Optionally, after the belonging control end antenna stops scanning after the frequency calibration is completed and sends the second single carrier signal to the main control end antenna, the method may further include:
setting a timeout time;
and when the subordinate control end antenna does not receive the synchronization signal sent by the main control end antenna within the overtime time, which indicates that the main control end antenna cannot successfully correct the frequency, skipping to the subordinate control end antenna to perform the steps of performing the first pitching angle pre-scanning and searching the first single carrier signal.
It should be noted that, 1) if the first single carrier signal is successfully captured and the frequency calibration is completed in the pitching pre-scanning process of the subordinate control end antenna, the subordinate control end antenna immediately stops pitching scanning and transmits the second single carrier signal to the main control end antenna, and since the channel has a certain symmetry, the main control end antenna can complete the frequency calibration with a high probability. 2) The overtime time is set to be 30 seconds after the sub-control-end antenna finishes frequency calibration, if the main control-end antenna synchronization signal is not received in 30, the sub-control-end antenna is considered to be overtime, the sub-control-end antenna stops sending the second single carrier signal to restart the pitching pre-scanning, and the pitching pre-scanning state of the main control-end antenna is kept unchanged. This process is cycled until the system successfully enters the synchronization phase.
Optionally, after the main control end antenna and the subordinate control end antenna perform signal strength detection through a single carrier signal at the corresponding initial azimuth, and meanwhile, perform prescan by using the first elevation angle, determine a coarse alignment angle of the antenna according to the strength of the received single carrier signal by comparison, and start to establish the communication control link, the method may further include:
the master control end antenna sends a timing instruction to the subordinate control end antenna, wherein the timing instruction comprises timing time; after receiving the timing instruction, the subordinate control end antenna feeds back to the main control end antenna; and when the timing time of the main control end antenna and the subordinate control end antenna is reached, respectively resetting the cycle second timer.
The timing opportunity is controlled by the antenna of the main control end, the whole interaction process is ensured to be completed within 1 second, and the two ends respectively clear the second cycle timer after the timing interaction is completed, so as to provide time reference for the subsequent link control instruction.
When the antenna is roughly aligned, the method does not depend on an elevation map, and the dependence of the super-line-of-sight wireless directional communication system on the elevation map is eliminated by adopting the initial pitch angle pre-scanning method, so that the efficiency of rough alignment is improved. After the timing phase is completed, the communication control link is already established, but the antennas at the two ends are not at the optimal communication angle, and the antenna fine alignment phase needs to be entered.
And 103, after the main control end antenna and the subordinate control end antenna complete initial synchronization, the main control end antenna and the subordinate control end antenna interact through a synchronization signal on a communication control link, and meanwhile, fine scanning is carried out by adopting a second pitch angle, and the antenna fine alignment angle is determined according to the measurement of the signal median of the received synchronization signal.
The second pitch angle search range is smaller than the first pitch angle search range to perform fine scanning in a smaller range.
In the fine antenna alignment stage, a granularity scanning method is adopted to resist channel fading interference, so that the median of a received signal under the fading channel condition is accurately measured, and accurate and reliable automatic antenna alignment of a wireless communication system is realized.
Optionally, in this step, after the main control end antenna and the subordinate control end antenna complete initial synchronization, the main control end antenna and the subordinate control end antenna interact with each other through a synchronization signal on a communication control link, and meanwhile, a second pitch angle fine scanning is adopted, and according to measurement of a signal median of the received synchronization signal, an accurate antenna alignment angle is determined, including:
after the main control end antenna sends a pitching fine scanning instruction to the subordinate control end antenna through the communication control link, the main control end antenna sends a synchronous signal continuously; after receiving the fine pitch scanning command, the subordinate control end antenna performs fine scanning at all the stationing points by adopting a second pitch angle, and after the scanning is finished, the position of the maximum point of the median of the received synchronous signals in all the stationing points is determined as the pitch angle position of the subordinate control end antenna; the subordinate control end antenna is switched to the determined depression elevation angle position, and pitching fine scanning completion information is sent to the main control end antenna; after receiving the fine pitching scanning completion information, the main control end antenna determines the pitch angle position of the main control end antenna in the same manner as the mode of determining the pitch angle position of the subordinate control end antenna; the antenna of the main control end is switched to the determined pitch angle position; the main control end antenna and the subordinate control end antenna adopt a pitch angle position determination mode to determine an azimuth angle; and when the azimuth angle is determined, finishing the antenna angle fine alignment.
It should be noted that the first pitch angle and the second pitch angle are both within the preset scanning range.
Optionally, the over-the-horizon wireless communication system generally has a signal fading phenomenon, and may be divided into fast fading and slow fading according to the fading period, and they have different statistical laws, and the antenna automatic alignment process is mainly affected by fast fading interference, so that the estimation of the receiving level under the current antenna angle is inaccurate, and the antenna alignment effect is poor. The median of the received signal is an important index for measuring the strength of the received signal, and can be used as a criterion for judging the size of the received signal.
In the process of acquiring the median of the signals by antenna alignment, the acquisition time of the antenna signals is theoretically at least longer than one fast fading period. Meanwhile, it should be noted that if the number of fading cycles included in the signal acquisition is small, interference of a sampled signal with less than one complete cycle exists when the average power of the signal is obtained, so that a large error also exists in the calculated signal median. Therefore, when the signal median value in a short time under a certain antenna attitude is acquired, the more signal samples are collected in a certain time interval, the more accurate the estimation of the signal median value is. However, the longer the time for acquiring the signal, the lower the efficiency of antenna alignment, and therefore, the time-consuming problem of simultaneously measuring the antenna alignment is required. The signal sampling period is not lower than 30 fast fading periods when the antenna is aligned.
When fine scanning is carried out, the dwell time of each stationary point is x seconds, the interval between each point is y degrees, and z points are scanned. If the maximum signal median point in the z points is in the middle part, the antenna angle returns to the maximum point position after the scanning is finished; if the maximum signal median point in the z points is at the boundary, further expanding one point in the direction, and then comparing the signal median results, and so on.
Optionally, determining a position of a maximum point of a median of the received synchronization signals in all the stationing points as a pitch angle position of the antenna at the subordinate control end, includes:
if the median maximum point of the received synchronous signals in all the stationing points is positioned at the middle position of all the stationing points, determining the position of the median maximum point as the pitch angle position of the subordinate control end antenna;
if the maximum point of the median of the received synchronization signals in all the stationing points is located at the boundary position of all the stationing points, expanding one stationing point towards the boundary direction of all the stationing points, and comparing the expanded stationing points with the signal median of the maximum point of the median of the current signals until the determined position of the maximum point of the median of the signals is not located at the boundary position of all the stationing points, and taking the position of the maximum point of the current median as the pitch angle position of the subordinate control terminal antenna.
After the antennas are accurately aligned, the antennas at two ends are positioned at the optimal communication angle, the communication control link state after the antennas are accurately aligned can be confirmed through initial communication verification, the antennas at two ends judge the link state through detecting the verification result of local end communication, if the antennas at two ends are correctly verified in a certain observation window, the communication link is successfully opened, otherwise, the current communication link is not enough to support service operation, and the antennas at two ends are aligned again.
According to the method for automatically aligning the over-the-horizon wireless communication system antenna, the signals are captured in a way of bending and pitching pre-scanning in the coarse alignment stage, the requirement on a storage space is reduced without depending on an elevation map, the residence time of the pre-scanning stagnation point is determined according to the distinction of the main control end antenna and the subordinate control end antenna, the full coverage of each scanning point of the main control end antenna and the subordinate control end antenna is ensured, and the success rate of signal capture is ensured. In the fine alignment stage, a particle size scanning method is adopted, a certain number of fading periods are covered through signal statistics of a fixed position, and the accuracy of receiving level estimation is ensured; the signal median is used as a measurement index of the received signal strength, so that the measurement deviation caused by special sampling points can be avoided, the accuracy and reliability of signal detection are ensured, and the antenna alignment precision is improved. And the scheme can realize automatic alignment of the antenna, really realize one-key opening and improve the alignment efficiency of the antenna.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The following are embodiments of the apparatus of the invention, reference being made to the corresponding method embodiments described above for details which are not described in detail therein.
Fig. 2 is a schematic structural diagram of an apparatus for automatically aligning an antenna of an over-the-horizon wireless communication system according to an embodiment of the present invention, which only shows portions related to the embodiment of the present invention for convenience of description, and the detailed description is as follows:
as shown in fig. 2, in the apparatus 2 for automatically aligning an antenna of an over-the-horizon wireless communication system, the main control terminal antenna and the subordinate control terminal antenna are opposite terminals, and the apparatus for automatically aligning an antenna of an over-the-horizon wireless communication system includes: a main control end antenna controller 21 and a subordinate control end antenna controller 22;
the main control terminal antenna controller 21 and the subordinate control terminal antenna controller 22 are respectively configured to determine an initial azimuth angle of the home terminal according to the opposite-end longitude and latitude and the home-end longitude and latitude, and control the home-end antenna to turn to the determined initial azimuth angle;
the main control end antenna controller 21 and the subordinate control end antenna controller 22 are used for performing signal strength detection through a single carrier signal at a corresponding initial azimuth angle, adopting a first pitch angle for pre-scanning, determining a coarse antenna alignment angle according to the strength of the received single carrier signal, and starting to establish a communication control link;
the main control end antenna controller 21 and the subordinate control end antenna controller 22 are used for performing interaction on the main control end antenna and the subordinate control end antenna through a synchronous signal on a communication control link after the main control end antenna and the subordinate control end antenna complete initial synchronization, and simultaneously performing fine scanning by adopting a second pitching angle to determine an antenna fine alignment angle according to measurement of a signal median of a received synchronous signal; the second pitch angle search range is smaller than the first pitch angle search range.
In one embodiment, the main control end antenna controller 21 and the subordinate control end antenna controller 22 respectively position and orient the beidou to obtain longitude and latitude height information and azimuth angle information of the local end;
the master control end antenna controller 21 and the subordinate control end antenna controller 22 respectively send Beidou messages to the opposite end, wherein the Beidou messages comprise longitude and latitude height information of the home end;
after the master control end antenna controller 21 and the subordinate control end antenna controller 22 respectively receive the Beidou messages of the opposite end, the initial azimuth angle of the home end is calculated according to the longitude and latitude height information of the opposite end, the longitude and latitude height information of the home end and the azimuth angle information;
the main control terminal antenna controller 21 and the subordinate control terminal antenna controller 22 respectively control the local terminal antenna controller to rotate the antenna azimuth to the initial azimuth corresponding to the local terminal.
In one embodiment of the present invention, the substrate is,
the main control end antenna controller 21 sends a first single carrier signal to the subordinate control end antenna controller 22 and scans by adopting a first pitch angle, and the subordinate control end antenna controller 22 scans by adopting the first pitch angle and searches for the first single carrier signal;
if the antenna controller 22 at the control end captures the first single carrier signal, performing frequency calibration;
the subordinate control end antenna controller 22 stops scanning after the frequency calibration is completed, and transmits a second single carrier signal to the antenna of the main control end controller 21;
if the main control end antenna controller 21 captures the second single carrier signal, performing frequency calibration, stopping scanning after the frequency calibration is completed, and sending a synchronization signal to the subordinate control end antenna controller 22 to achieve initial synchronization of the main control end antenna controller 21 and the subordinate control end antenna controller 22, and starting to establish a communication control link.
In an embodiment, when the master antenna controller 21 sends the first single carrier signal to the slave antenna controller 22 and performs the first pitch angle pre-scanning, the dwell time of the master antenna controller 21 at each point is the time of the slave antenna controller 22 adopting the first pitch angle pre-scanning for one period;
when the subordinate control end antenna controller 22 performs the first pitch angle pre-scanning and searches for the first single carrier signal, the residence time of the subordinate control end antenna controller 22 at each point is 1/n of the residence time of the main control end antenna controller 21 at each point, and n represents the number of residence points of the subordinate control end antenna controller 22 performing the first pitch angle pre-scanning.
In one embodiment, the subordinate-control-side antenna controller 22 sets a timeout;
and when the subordinate-control-end antenna controller 22 does not receive the synchronization signal sent by the main-control-end antenna controller 21 within the timeout time, skipping to the subordinate-control-end antenna controller 22 to perform the step of performing the first pitch angle pre-scanning and searching the first single-carrier signal.
In an embodiment, the master antenna controller 21 sends a timing instruction to the slave antenna controller 22, where the timing instruction includes timing time;
after receiving the timing instruction, the subordinate control end antenna controller 22 feeds back the timing instruction to the main control end antenna controller 21;
the master control end antenna controller 21 and the subordinate control end antenna controller 22 perform timing at the timing time, and clear the second timer of the cycle.
In an embodiment, after the master control-end antenna controller 21 sends the pitching fine scanning instruction to the slave control-end antenna controller 22 through the communication control link, the synchronization signal is sent without interruption;
after receiving the fine pitch scanning command, the subordinate control end antenna controller 22 performs fine scanning at all the stationing points by using a second pitch angle, and after the scanning is completed, determines the position of the maximum median point of the received synchronization signals in all the stationing points as the pitch angle position of the subordinate control end antenna controller 22;
the subordinate control end antenna controller 22 switches to the determined pitch angle position and sends pitch fine scanning completion information to the main control end antenna controller 21;
after receiving the fine pitch scanning completion information, the main control end antenna controller 21 determines the pitch angle position of the main control end antenna controller 21 in the same manner as that of the subordinate control end antenna controller 21;
the antenna controller 21 at the main control end is switched to the determined pitch angle position;
the main control end antenna controller 21 and the subordinate control end antenna controller 22 determine the azimuth angle in a pitch angle position determination mode;
and finishing the antenna angle fine alignment after the azimuth angle is determined.
In an embodiment, if the median maximum point of the received synchronization signals in all the stationing points is located at the middle position of all the stationing points, the subordinate-control-end antenna controller 22 determines that the location of the median maximum point is the pitch angle position of the subordinate-control-end antenna;
if the maximum median point of the received synchronization signals in all the stationing points is located at the boundary position of all the stationing points, the antenna controller 22 at the subordinate control end expands one stationing point towards the boundary direction of all the stationing points, compares the expanded stationing points with the signal median value of the maximum median point in the current signal, and takes the position of the maximum median point in the current signal as the pitch angle position of the antenna at the subordinate control end until the determined position of the maximum median point in the signal is not located at the boundary position of all the stationing points.
According to the device for automatically aligning the antenna of the beyond-visual-range wireless communication system, the main control end antenna controller and the subordinate control end antenna controller capture signals in a pitching pre-scanning mode in the coarse alignment stage, the requirement on a storage space is reduced without depending on an elevation map, the residence time of the pre-scanning stagnation point is determined according to the distinction between the main control end antenna and the subordinate control end antenna, the full coverage of each scanning point of the main control end antenna and the subordinate control end antenna is ensured, and the success rate of signal capture is ensured. In the fine alignment stage, the main control end antenna controller and the subordinate control end antenna controller adopt a particle size scanning method, cover a certain number of fading periods through signal statistics of fixed positions, and ensure the accuracy of received level estimation; the signal median is used as a measurement index of the received signal strength, so that the measurement deviation caused by special sampling points can be avoided, the accuracy and reliability of signal detection are ensured, and the antenna alignment precision is improved. And the scheme can realize automatic alignment of the antenna, really realize one-key opening and improve the alignment efficiency of the antenna.
Fig. 3 is a schematic diagram of a terminal according to an embodiment of the present invention. As shown in fig. 3, the terminal 3 of this embodiment includes: a processor 30, a memory 31 and a computer program 32 stored in said memory 31 and executable on said processor 30. The processor 30 executes the computer program 32 to implement the steps of the above-mentioned method embodiments for automatically aligning antennas of over-the-horizon wireless communication systems, such as the steps 101 to 103 shown in fig. 1. Alternatively, the processor 30, when executing the computer program 32, implements the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the modules/units 21 to 22 shown in fig. 2.
Illustratively, the computer program 32 may be partitioned into one or more modules/units that are stored in the memory 31 and executed by the processor 30 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 32 in the terminal 3. For example, the computer program 32 may be divided into the modules/units 21 to 22 shown in fig. 2.
The terminal 3 may be a desktop computer, a notebook, a digital electronic device, a palm computer, a cloud server, or other computing devices. The terminal 3 may include, but is not limited to, a processor 30, a memory 31. It will be appreciated by those skilled in the art that fig. 3 is only an example of a terminal 3 and does not constitute a limitation of the terminal 3 and may comprise more or less components than those shown, or some components may be combined, or different components, e.g. the terminal may further comprise input output devices, network access devices, buses, etc.
The Processor 50 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 51 may be an internal storage unit of the terminal 5, such as a hard disk or a memory of the terminal 5. The memory 51 may also be an external storage device of the terminal 5, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) and the like equipped on the terminal 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the terminal 5. The memory 51 is used for storing the computer program and other programs and data required by the terminal. The memory 51 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned functional units and modules are illustrated as being divided, and in practical applications, the above-mentioned functions may be distributed as different functional units and modules according to needs, that is, the internal structure of the apparatus may be divided into different functional units or modules to complete all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit, and the integrated unit may be implemented in the form of a hardware or a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. For the specific working processes of the units and modules in the system, reference may be made to the corresponding processes in the foregoing method embodiments, which are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described or recited in detail in a certain embodiment, reference may be made to the descriptions of other embodiments.
Those of ordinary skill in the art would appreciate that the elements and algorithm steps of the various embodiments described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method can be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above-described method embodiments may be implemented by instructing related hardware through a computer program, where the computer program may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the above-described method embodiments for automatically aligning antennas of over-the-horizon wireless communication systems may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components that may be suitably increased or decreased in accordance with the requirements of legislation and patent practice in jurisdictions where, for example, computer readable media in accordance with legislation and patent practice are not included for electrical carrier signals and telecommunications signals.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the present invention, and are intended to be included within the scope thereof.
Claims (10)
1. A method for automatically aligning over-the-horizon wireless communication system antennas is characterized in that a main control end antenna and a subordinate control end antenna are opposite end antennas, and the over-the-horizon wireless communication system antenna alignment comprises the following steps:
the main control terminal antenna and the subordinate control terminal antenna respectively determine an initial azimuth angle of a home terminal according to the longitude and latitude of an opposite terminal and the longitude and latitude of the home terminal, and control the home terminal antenna to turn to the determined initial azimuth angle;
the main control end antenna and the subordinate control end antenna carry out signal strength detection through single carrier signals at corresponding initial azimuth angles, meanwhile, a first pitching angle is adopted for pre-scanning, according to the strength of the received single carrier signals, the rough alignment angle of the antenna is determined, and a communication control link is started to be established;
after the main control end antenna and the subordinate control end antenna complete initial synchronization, the main control end antenna and the subordinate control end antenna interact through a synchronization signal on the communication control link, meanwhile, a second pitching angle fine scanning is adopted, and an antenna fine alignment angle is determined according to the measurement of a signal median of the received synchronization signal; the second pitch angle search range is smaller than the first pitch angle search range.
2. The method of claim 1, wherein the determining an initial azimuth angle of the home terminal and controlling the home terminal antenna to turn to the determined initial azimuth angle according to the longitude and latitude of the opposite terminal and the longitude and latitude of the home terminal respectively comprises:
the main control end antenna and the subordinate control end antenna respectively obtain longitude and latitude height information and direction angle information of the terminal according to respective positioning and directional Beidou;
the master control end antenna and the subordinate control end antenna respectively send Beidou messages to opposite ends, and the Beidou messages comprise longitude and latitude height information of a local end;
after the master control end antenna and the subordinate control end antenna respectively receive the Beidou messages of the opposite end, the initial azimuth angle of the home end is calculated according to the longitude and latitude height information of the opposite end, the longitude and latitude height information of the home end and the azimuth angle information;
and the main control end antenna and the subordinate control end antenna respectively control the local end antenna controller to rotate the antenna direction to the initial azimuth corresponding to the local end.
3. The method according to claim 2, wherein the method for automatically aligning antennas of over-the-horizon wireless communication system, in which the main control end antenna and the subordinate control end antenna perform signal strength detection through a single carrier signal at corresponding initial azimuth angles, and simultaneously perform pre-scanning by using a first elevation angle, determine a coarse alignment angle of the antennas according to the strength of the received single carrier signal, and start to establish a communication control link, comprises:
the main control end antenna sends a first single carrier signal to the subordinate control end antenna and scans by adopting a first pitch angle, and meanwhile, the subordinate control end antenna scans by adopting the first pitch angle and searches the first single carrier signal;
if the subordinate control end antenna captures the first single carrier signal, carrying out frequency calibration;
the subordinate control end antenna stops scanning after the frequency calibration is finished, and a second single carrier signal is sent to the main control end antenna;
and if the main control end antenna captures the second single carrier signal, performing frequency calibration, stopping scanning after the frequency calibration is completed, and sending a synchronization signal to the subordinate control end antenna to realize the initial synchronization of the main control end antenna and the subordinate control end antenna and start to establish a communication control link.
4. The method according to claim 3, wherein when the main control end antenna sends a first single carrier signal to the subordinate control end antenna and performs a first elevation angle pre-scanning, the dwell time of the main control end antenna at each dwell point is the time of the subordinate control end antenna adopting the first elevation angle pre-scanning for one period;
when the subordinate control end antenna performs first pitching angle pre-scanning and searches the first single carrier signal, the residence time of the subordinate control end antenna at each residence point is 1/n of the residence time of the main control end antenna at each residence point, and n represents the number of residence points of the subordinate control end antenna for the first pitching angle pre-scanning.
5. The method according to claim 3, wherein after the subordinate control terminal antenna stops scanning after the frequency calibration is completed and sends a second single carrier signal to the master control terminal antenna, the method further comprises:
setting a timeout time;
and when the subordinate control end antenna does not receive the synchronous signal sent by the main control end antenna within the overtime time, skipping to the subordinate control end antenna to perform the first pitching angle pre-scanning and searching the first single carrier signal.
6. The method according to any of claims 1-5, wherein after the main control end antenna and the subordinate control end antenna perform signal strength detection through a single carrier signal at corresponding initial azimuth angles, and perform pre-scanning with a first elevation angle, determine a coarse antenna alignment angle according to the strength of the single carrier signal received by comparison, and start to establish a communication control link, the method further comprises:
the master control end antenna sends a timing instruction to the subordinate control end antenna, wherein the timing instruction comprises timing time;
after receiving the timing instruction, the subordinate control end antenna feeds back to the main control end antenna;
and respectively clearing a second cycle timer when the time correction time of the main control end antenna and the subordinate control end antenna is reached.
7. The method according to any of claims 1-5, wherein after the primary control antenna and the subordinate control antenna are initially synchronized, the primary control antenna and the subordinate control antenna interact with each other via a synchronization signal on the communication control link, and a second fine pitch scanning is performed to determine an antenna fine alignment angle according to a measurement of a signal median of the received synchronization signal, the method comprising:
the main control end antenna sends a pitching fine scanning instruction to the subordinate control end antenna through the communication control link and then sends a synchronous signal continuously;
after receiving the fine pitch scanning instruction, the subordinate control end antenna performs fine scanning at all stagnation points by adopting a second pitch angle, and after the scanning is finished, the position of the maximum median point of the received synchronous signals in all the stagnation points is determined as the pitch angle position of the subordinate control end antenna;
the subordinate control end antenna is switched to the determined pitch angle position, and pitch fine scanning completion information is sent to the main control end antenna;
after receiving the fine pitching scanning completion information, the main control end antenna determines the pitching angle position of the main control end antenna in the same manner as the subordinate control end antenna determines the pitching angle position;
the main control end antenna is switched to a determined pitch angle position;
the main control end antenna and the subordinate control end antenna adopt a pitch angle position determination mode to determine an azimuth angle;
and finishing the antenna angle fine alignment after the azimuth angle is determined.
8. The method according to claim 7, wherein the determining a position of a maximum point of a median of the received synchronization signals in all the stationing points as a pitch angle position of the subordinate-control-end antenna comprises:
if the median maximum point of the received synchronous signals in all the stationing points is positioned at the middle position of all the stationing points, determining the position of the median maximum point as the pitch angle position of the subordinate control end antenna;
if the maximum point of the median of the received synchronization signals in all the stationing points is located at the boundary position of all the stationing points, expanding one stationing point towards the boundary direction of all the stationing points, and comparing the expanded stationing points with the signal median of the maximum point of the median of the current signals until the determined position of the maximum point of the median of the signals is not located at the boundary position of all the stationing points, and taking the position of the maximum point of the current median as the pitch angle position of the subordinate control terminal antenna.
9. The utility model provides a device of beyond visual range wireless communication system antenna automatic alignment which characterized in that, main control end antenna and subordinate accuse end antenna are each other for the opposite terminal antenna, and device of beyond visual range wireless communication system antenna automatic alignment includes: the main control end antenna controller and the subordinate control end antenna controller;
the main control terminal antenna controller and the subordinate control terminal antenna controller are respectively used for determining an initial azimuth angle of a home terminal according to the longitude and latitude of an opposite terminal and the longitude and latitude of the home terminal and controlling the home terminal antenna to rotate to the determined initial azimuth angle;
the main control end antenna controller and the subordinate control end antenna controller are used for carrying out signal strength detection through a single carrier signal at a corresponding initial azimuth angle, meanwhile, adopting a first pitching angle for pre-scanning, determining an antenna coarse alignment angle according to the strength of the received single carrier signal, and starting to establish a communication control link;
the main control end antenna controller and the subordinate control end antenna controller are used for interacting through a synchronous signal on the communication control link after the main control end antenna and the subordinate control end antenna complete initial synchronization, and determining an antenna fine alignment angle according to measurement of a signal median of a received synchronous signal by adopting a second pitching angle fine scanning; the second pitch angle search range is smaller than the first pitch angle search range.
10. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of the method for over-the-horizon wireless communication system antenna automatic alignment as claimed in any of the preceding claims 1 to 8.
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| CN202110939200.3A CN113871875B (en) | 2021-08-16 | 2021-08-16 | Method, device and terminal for automatically aligning antennas of beyond-the-horizon wireless communication system |
| PCT/CN2022/081001 WO2023019929A1 (en) | 2021-08-16 | 2022-03-15 | Automatic antenna alignment method and apparatus for over-the-horizon wireless communication system, and terminal |
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| CN202110939200.3A CN113871875B (en) | 2021-08-16 | 2021-08-16 | Method, device and terminal for automatically aligning antennas of beyond-the-horizon wireless communication system |
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| CN114039677A (en) * | 2022-01-11 | 2022-02-11 | 深圳市永达电子信息股份有限公司 | Automatic alignment method and system for point-to-point wireless communication equipment |
| CN114614919A (en) * | 2022-01-19 | 2022-06-10 | 中国电子科技集团公司第五十四研究所 | Antenna alignment method and device and electronic equipment |
| WO2023019929A1 (en) * | 2021-08-16 | 2023-02-23 | 中国电子科技集团公司第五十四研究所 | Automatic antenna alignment method and apparatus for over-the-horizon wireless communication system, and terminal |
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| CN117728182B (en) * | 2024-02-07 | 2024-05-07 | 成都点阵科技有限公司 | Automatic alignment method and system for relay machine antenna based on Beidou |
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| WO2023019929A1 (en) | 2023-02-23 |
| CN113871875B (en) | 2023-12-08 |
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