CN112216986A - Beam tracking method, beam tracking device, computer equipment and readable storage medium - Google Patents
Beam tracking method, beam tracking device, computer equipment and readable storage medium Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/28—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the amplitude
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- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/544—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices for evaluating functions by calculation
- G06F7/5446—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices for evaluating functions by calculation using crossaddition algorithms, e.g. CORDIC
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- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
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Abstract
The embodiment of the invention provides a beam tracking method, a beam tracking device, computer equipment and a readable storage medium, which relate to the technical field of communication measurement and control, wherein the beam tracking method comprises the following steps: acquiring a current state angle, a polarization source rotation angle and a reference amplitude of an antenna carrier according to a preset time interval, wherein the current state angle is used for representing the attitude of the antenna carrier, and the polarization source rotation angle is used for representing the geographical position change condition of the antenna carrier; calculating to obtain a basic phase and a basic amplitude of the antenna carrier according to the current state angle and the reference amplitude; calculating to obtain a target polarization angle of the antenna carrier according to the current state angle and the polarization source rotation angle; adjusting the basic phase and the basic amplitude according to the target polarization angle to obtain a target phase and a target amplitude; and performing beam tracking on the communication satellite based on the target phase and the target amplitude, wherein the beam tracking can be stably performed through the steps.
Description
Technical Field
The invention relates to the technical field of communication measurement and control, in particular to a beam tracking method, a beam tracking device, computer equipment and a readable storage medium.
Background
With the development of communication technology, the antenna carrier in motion is capable of processing a large amount of communication data by using a communication satellite as a transfer station, which makes the reliability, low cost, and stability of communication signals between the antenna carrier and the communication satellite a concern. In the prior art, the antenna carrier usually performs beam tracking on the communication satellite by using a linear polarization manner to realize communication between the antenna carrier and the communication satellite, however, this scheme has many interference factors, for example, cross polarization interference caused by the inconsistency of the polarization direction of the antenna carrier beam and the polarization direction of the communication satellite, may cause the quality of the received signal to be reduced.
In view of the above, it is necessary for those skilled in the art to provide a stable beam tracking scheme.
Disclosure of Invention
The invention provides a beam tracking method, a beam tracking device, a computer device and a readable storage medium.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides a beam tracking method, which is applied to a computer device, where the computer device is in communication connection with an antenna carrier, and the antenna carrier establishes communication connection with a communication satellite through beam tracking;
the method comprises the following steps:
acquiring a current state angle, a polarization source rotation angle and a reference amplitude of an antenna carrier according to a preset time interval, wherein the current state angle is used for representing the attitude of the antenna carrier, and the polarization source rotation angle is used for representing the geographical position change condition of the antenna carrier;
calculating to obtain a basic phase and a basic amplitude of the antenna carrier according to the current state angle and the reference amplitude;
calculating to obtain a target polarization angle of the antenna carrier according to the current state angle and the polarization source rotation angle;
adjusting the basic phase and the basic amplitude according to the target polarization angle to obtain a target phase and a target amplitude;
and carrying out beam tracking on the communication satellite based on the target phase and the target amplitude.
In an alternative embodiment, the current state angle comprises a current beam off-axis angle, a current rotation angle, and a current polarization declination angle;
calculating a basic phase and a basic amplitude of the antenna carrier according to the current state angle and the reference amplitude, wherein the step comprises the following steps:
respectively adjusting the current beam off-axis angle and the current rotation angle based on a gradient tracking algorithm to obtain a target beam off-axis angle and a target rotation angle of the antenna carrier;
calculating a basic phase according to the off-axis angle of the target beam and the target rotation angle;
calculating a base amplitude from the reference amplitude;
calculating a target polarization angle of the antenna carrier according to the current state angle and the polarization source rotation angle, wherein the step comprises the following steps:
and calculating a target polarization angle according to the current polarization deflection angle and the polarization source rotation angle.
In an alternative embodiment, a computer device is configured with an antenna angle generating unit and a digital beam forming unit;
the method comprises the following steps of adjusting a current beam off-axis angle based on a gradient tracking algorithm to obtain a target beam off-axis angle, wherein the steps comprise:
generating an initial off-axis angle and a current stepping amount matched with the initial off-axis angle by the antenna angle generating unit;
adding the initial off-axis angle and the current stepping amount to obtain an undetermined off-axis angle;
processing the initial off-axis and the angle of the axis to be determined by the digital beam forming unit to obtain an initial level and a level to be determined;
calculating the current gradient of the antenna carrier according to the initial level, the initial off-axis angle, the to-be-determined level and the to-be-determined off-axis angle;
judging whether the current gradient is lower than a preset gradient threshold value or not;
if so, taking the undetermined off-axis angle as a target beam off-axis angle;
if not, taking the undetermined level as an initial level and the undetermined off-axis angle as an initial off-axis angle, and repeating the steps until the off-axis angle of the target beam is obtained.
In an optional embodiment, the computer device is further configured with a wave control resolving unit, and the computer device stores a storage compensation table entry;
the step of calculating a base phase from the target beam off-axis angle and the target rotation angle includes:
acquiring a reference frequency and a compensation table entry of a preset antenna carrier;
and resolving the off-axis angle of the target beam, the target rotation angle and the reference frequency by a wave control resolving unit to obtain a basic phase based on a wave control resolving formula and a compensation table entry.
In an alternative embodiment, the antenna carrier includes a plurality of antenna elements, and the compensation table entry includes coordinates, a phase compensation value, and a phase weighting value of each antenna element;
the method comprises the following steps of resolving a target beam off-axis angle, a target rotation angle and a reference frequency through a wave control resolving unit based on a wave control resolving formula and a compensation table entry to obtain a basic phase, and comprises the following steps:
according to a wave control resolving formula:
performing wave control calculation to obtain the undetermined phase of the antenna carrier, wherein phase is the undetermined phase, f is the reference frequency, theta is the off-axis angle of the target beam,
the target rotation angle is set, and xi and yi are coordinates of an antenna array element i;
compensating the undetermined phase according to the phase compensation value;
and according to the phase weighted value, carrying out weighting processing on the undetermined phase after compensation processing to obtain a basic phase.
In an alternative embodiment, the computer device is further configured with a polarization control unit;
the method comprises the following steps of obtaining a current polarization deflection angle and a polarization source rotation angle, wherein the steps comprise:
obtaining a current polarization deflection angle and a polarization source rotation angle based on a global positioning system and an inertial measurement computing network;
the step of calculating the target polarization angle according to the current polarization deflection angle and the polarization source rotation angle comprises the following steps:
acquiring a global polarization angle of an antenna carrier, wherein the global polarization angle comprises a plurality of to-be-determined polarization angles;
based on the current polarization deflection angle and the polarization source rotation angle, calculating to obtain electric field energy corresponding to each to-be-determined polarization angle through a polarization control unit;
and determining a target polarization angle from the undetermined polarization angles, wherein the target polarization angle is the polarization angle with the maximum corresponding electric field energy in the undetermined polarization angles.
In an alternative embodiment, a computer device is configured with a polarization calculation digital implementation unit;
adjusting the basic phase and the basic amplitude according to the target polarization angle to obtain a target phase and a target amplitude, wherein the step comprises the following steps:
and adjusting the polarization direction of the antenna carrier by a polarization calculation digital implementation unit for the target polarization angle, the basic phase and the basic amplitude based on the attenuation amplitude phase value mode so as to obtain the target phase and the target amplitude.
In a second aspect, an embodiment of the present invention provides a beam tracking apparatus, which is applied to a computer device, where the computer device is in communication connection with an antenna carrier, and the antenna carrier establishes communication connection with a communication satellite through beam tracking;
the device comprises:
the antenna carrier comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a current state angle, a polarization source rotation angle and a reference amplitude of an antenna carrier according to a preset time interval, the current state angle is used for representing the attitude of the antenna carrier, and the polarization source rotation angle is used for representing the geographical position change condition of the antenna carrier;
the calculation module is used for calculating and obtaining a basic phase and a basic amplitude of the antenna carrier according to the current state angle and the reference amplitude; calculating to obtain a target polarization angle of the antenna carrier according to the current state angle and the polarization source rotation angle;
the tracking module is used for adjusting the basic phase and the basic amplitude according to the target polarization angle to obtain a target phase and a target amplitude; and carrying out beam tracking on the communication satellite based on the target phase and the target amplitude.
In a third aspect, an embodiment of the present invention provides a computer device, where the computer device includes a processor and a non-volatile memory storing computer instructions, and when the computer instructions are executed by the processor, the computer device executes the beam tracking method in any one of the foregoing embodiments.
In a fourth aspect, an embodiment of the present invention provides a readable storage medium, where the readable storage medium includes a computer program, and the computer program controls a computer device in the readable storage medium to execute the beam tracking method in any one of the foregoing embodiments when executed.
The beneficial effects of the embodiment of the invention include, for example: by adopting the beam tracking method, the beam tracking device, the computer equipment and the readable storage medium provided by the embodiment of the invention, the current state angle, the polarization source rotation angle and the reference amplitude of the antenna carrier are obtained according to the preset time interval, wherein the current state angle is used for representing the attitude of the antenna carrier, and the polarization source rotation angle is used for representing the geographical position change condition of the antenna carrier; calculating to obtain a basic phase and a basic amplitude of the antenna carrier according to the current state angle and the reference amplitude; calculating to obtain a target polarization angle of the antenna carrier according to the current state angle and the polarization source rotation angle; then, adjusting the basic phase and the basic amplitude according to the target polarization angle to obtain a target phase and a target amplitude; and finally, beam tracking is carried out on the communication satellite based on the target phase and the target amplitude, and stable beam tracking of the communication satellite can be realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is an interaction diagram of a beam tracking system according to an embodiment of the present invention;
fig. 2 is a schematic flowchart illustrating steps of a beam tracking method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an arrangement of antenna panel elements according to an embodiment of the present invention;
fig. 4 is a diagram of a difference between FPGA resolving and matlab resolving according to an embodiment of the present invention;
FIG. 5 is another difference diagram between FPGA resolution and matlab resolution provided by the embodiment of the present invention;
fig. 6 is a schematic block diagram of a beam tracking apparatus according to an embodiment of the present invention;
fig. 7 is a block diagram schematically illustrating a structure of a computer device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
With the development of communication technology, the reliability, low cost and stability of the measurement and control technology of aligning the antenna to the communication satellite are increasing day by day. In the prior art, generally, a linear polarization method is adopted to adjust the beam transmitting direction of an antenna so as to realize beam tracking, and further, a communication satellite can be used as a transfer station to realize processing of a large amount of data. The antenna is generally carried by a mobile carrier, so that the polarization direction of a mobile carrier wave beam is inconsistent with the polarization direction of a satellite due to the change of the position of the mobile carrier in the moving process, and further, the problems of cross polarization interference and the like are caused, and the quality of a received signal is reduced.
Referring to fig. 1, the present embodiment provides a beam tracking system, which includes a computer device 100 and an antenna carrier 200 communicatively connected to the computer device 100, wherein the antenna carrier 200 establishes a communication connection with a communication satellite 300 through beam tracking.
To solve the foregoing problem, please refer to fig. 2, fig. 2 is a flowchart illustrating steps of a beam tracking method according to an embodiment of the present invention, the beam tracking method is implemented by the computer device 100 in fig. 1, and the beam tracking method is described in detail below.
Step 201, obtaining the current state angle, the polarization source rotation angle and the reference amplitude of the antenna carrier 200 according to a preset time interval.
The current state angle is used for representing the attitude of the antenna carrier 200, and the polarization source rotation angle is used for representing the geographical position change condition of the antenna carrier 200.
In the embodiment of the present invention, as the antenna carrier 200 moves, the road condition information passing in the way may be changed (for example, moving on a steep mountain road) according to the change of the geographic position because the carrier is in a moving state, the current state angle calculated before may be changed due to the change of the roll, pitch and yaw angles, and the polarization source rotation angle may represent the geographic position change condition of the antenna carrier 200.
Step 202, calculating to obtain a basic phase and a basic amplitude of the antenna carrier 200 according to the current state angle and the reference amplitude.
The reference amplitude may be calculated in advance, or may be preset according to actual requirements, and is not limited herein.
Step 203, calculating to obtain the target polarization angle of the antenna carrier 200 according to the current state angle and the polarization source rotation angle.
The target polarization angle of the antenna carrier 200 calculated from the current-state angle and the polarization source rotation angle is matched with the polarization angle of the communication satellite 300.
And 204, adjusting the basic phase and the basic amplitude according to the target polarization angle to obtain a target phase and a target amplitude.
On the basis of determining the target polarization angle, the calculated basic phase and basic amplitude can be adjusted to obtain the target phase and target amplitude, and the communication WeChat can be aligned with the target phase and the target amplitude.
In step 205, the communication satellite 300 is beam tracked based on the target phase and the target amplitude.
Through the steps, the scheme that the antenna carrier 200 in motion can be always accurately aligned with the communication antenna is realized, and a stable and reliable beam tracking method is realized.
On the basis of the foregoing, the current state angle includes a current beam off-axis angle, a current rotation angle, and a current polarization deviation angle. In order to express the scheme of the present invention more clearly, the foregoing step 202 includes the following embodiments.
In the substep 202-1, the off-axis angle of the current beam and the current rotation angle are adjusted based on a gradient tracking algorithm, respectively, to obtain the off-axis angle of the target beam and the target rotation angle of the antenna carrier 200.
In the embodiment of the present invention, a gradient tracking algorithm may be adopted to adjust the current beam off-axis angle and the current rotation angle respectively, so as to obtain a target beam off-axis angle and a target rotation angle of the antenna carrier 200, where the target beam off-axis angle and the target rotation angle are respectively the beam off-axis angle and the rotation angle that the antenna carrier 200 needs to correspond to.
Sub-step 202-2, calculating a base phase based on the target beam off-axis angle and the target rotation angle.
Sub-step 202-3, calculating a base amplitude from the reference amplitude.
Through the scheme, the basic phase and the basic amplitude can be accurately acquired.
Accordingly, the foregoing step 203 can be implemented as follows.
And a substep 203-1 of calculating a target polarization angle according to the current polarization declination and the polarization source rotation angle.
In the embodiment of the present invention, the target polarization angle may be calculated by jointly participating in the current polarization deflection angle and the polarization source rotation angle.
On this basis, the computer apparatus 100 is configured with an antenna angle generating unit and a digital beam forming unit. As an alternative example, the foregoing sub-step 202-1 includes the following detailed description.
(1) And generating an initial off-axis angle and a current stepping amount matched with the initial off-axis angle by the antenna angle generating unit.
(2) And adding the initial off-axis angle and the current stepping amount to obtain an undetermined off-axis angle.
(3) And processing the initial off-axis and the to-be-determined off-axis angle by the digital beam forming unit to obtain an initial level and a to-be-determined level.
(4) And calculating the current gradient of the antenna carrier 200 according to the initial level, the initial off-axis angle, the to-be-determined level and the to-be-determined off-axis angle.
(5) And judging whether the current gradient is lower than a preset gradient threshold value or not.
(6) And if so, taking the to-be-determined off-axis angle as the off-axis angle of the target beam.
(7) If not, taking the undetermined level as an initial level and the undetermined off-axis angle as an initial off-axis angle, and repeating the steps until the off-axis angle of the target beam is obtained.
In the embodiment of the present invention, the way of calculating the off-axis angle of the target beam is consistent with the way of calculating the target rotation angle, and the calculation process of the off-axis angle of the target beam is explained. The initial off-axis angle and the current step amount matched to the initial off-axis angle, which may be set in advance, may be determined by the antenna angle generation unit. And processing the initial off-axis and the to-be-determined off-axis angle by the digital beam forming unit to obtain an initial level and a to-be-determined level.
Specifically, the initial off-axis angle θ may be set in advance1And the corresponding current stepping amount delta theta, and the to-be-determined off-axis angle can be obtained by adding the current stepping amount delta theta and the to-be-determined off-axis angle theta2＝θ1+ Δ θ. After determining the initial off-axis angle theta1And undetermined off-axis angle theta2Then, can pass through the formula
The current gradient of the antenna carrier 200 is calculated, wherein,
for the current gradient, U, of the antenna carrier 2001At an initial level, U2Is the pending level. The small value epsilon of the gradient approaching zero (i.e. the preset gradient threshold) can be preset if the current gradient is
If the absolute value of (a) is less than the absolute value of epsilon, the undetermined off-axis angle theta obtained at the moment is determined2As the off-axis angle of the target beam, the other is θ2And U2As initial value, tracking calculation is carried out again until an absolute value smaller than epsilon is obtainedAngle of undetermined departure from axis theta2。
It is to be noted that, in the embodiment of the present invention, the coefficient of the current step amount Δ θ each time the tracking loop calculation is performed, that is, the coefficient may be set in advance
Wherein a is a coefficient of the current stepping amount delta theta during each tracking cycle calculation, a can be larger during the initial calculation, and then gradually decreases with the tracking cycle, and the purpose of the method is to accurately determine the undetermined shaft angle theta by gradually decreasing the value of the current stepping amount delta theta2It should be understood that when a is set, values can be taken according to pre-calculated related data, so that the problem that the final output value of the tracking algorithm is long in time or large in size, which causes tracking divergence, is avoided.
In addition to this, the above-mentioned initial off-axis angle θ is carried out1Angle of undetermined departure theta2、U1Is an initial level and U2When the correlation calculation of the undetermined level is performed, the angle control unit and the digital beam forming unit may be configured correspondingly and may be composed of adders, specifically, the digital beam forming unit outputs each array element (located on the antenna carrier 200, that is, an antenna for transmitting and receiving the magnetic signal) of the antenna and calculates the complex weighting coefficient and the complex weighting level according to the received level. The change of the overall level is that two paths of signals are subjected to parallel addition operation after the unit array elements are weighted, and the total output is synthesized, namely when the weighting level is calculated, the calculation formula of three trigonometric functions is provided, on the basis, for Digital logic, the resources occupied by the adder are far less than that of the multiplier, so that the application of the trigonometric function operation can be carried out by applying 3 CORDIC (Coordinate Rotation Digital Computer for short) algorithm units in the Digital beam forming unit, the use of the multiplier can be reduced, and the utilization rate of Digital logic resources is reduced.
It should be understood that, as described above, the target rotation angle is acquired in the same manner as the target off-axis angle, but the target rotation angle may be acquired first to save the area and workload of the digital beam forming unit.
On the basis, the computer device 100 is further configured with a wave control resolving unit, and the computer device 100 stores a storage compensation table entry. As an alternative embodiment, the aforementioned sub-step 202-2 may be implemented by the following steps.
(1) The reference frequency and the compensation table entry of the preset antenna carrier 200 are obtained.
(2) And resolving the off-axis angle of the target beam, the target rotation angle and the reference frequency by a wave control resolving unit to obtain a basic phase based on a wave control resolving formula and a compensation table entry.
The antenna carrier 200 comprises a plurality of antenna elements and the compensation table entries comprise coordinates, phase compensation values and phase weighting values for each antenna element. In order to express the scheme of the present invention more clearly, the step (2) in the foregoing sub-step 202-2 may be implemented as follows.
Solving a formula according to wave control:
and performing wave control calculation to obtain the undetermined phase of the antenna carrier 200.
Wherein phase is the undetermined phase, f is the reference frequency, theta is the off-axis angle of the target beam,
for the target rotation angle, xi and yi are the coordinates of antenna element i.
And (II) compensating the undetermined phase according to the phase compensation value.
And thirdly, weighting the undetermined phase after compensation processing according to the phase weighted value to obtain a basic phase.
In the embodiment of the present invention, a QSPI-FLASH (Quad SPI-FLASH, memory) may be used to store a compensation table entry, which includes an array element coordinate table (coordinate of an antenna array element), a table entry version, an amplitude-phase compensation table (phase compensation value and phase weighted value), and a Monolithic Microwave Integrated Circuit (MMIC) channel table to be used. The reference frequency of the antenna carrier 200 may be input by a user as well as the reference amplitude of the antenna carrier 200, or may be pre-stored.
Based on this, the wave control resolving unit can resolve the off-axis angle of the target wave beam, the target rotation angle and the reference frequency to obtain the basic phase, specifically, the wave control resolving formula can be used for realizing, and the whole calculation is implemented by using pipeline processing and is implemented by using a two-stage CORDIC algorithm unit. It should be understood that, the basic amplitude may also be calculated in the above manner, and the corresponding amplitude compensation value and the corresponding amplitude weighted value obtained from the amplitude-phase compensation table may be obtained based on the aforementioned reference amplitude, which is not described herein again. The wave control resolving formula can be represented by the formula:
simplifying the method, wherein C is the speed of light, and 3 x 10 x 8m/s is taken.
On the basis of the foregoing, the computer apparatus 100 is further provided with a polarization control unit, and with respect to the foregoing step 201, it can be implemented in the following manner.
And a substep 201-1, acquiring a current polarization deflection angle and a polarization source rotation angle based on a global positioning system and an inertial measurement computing network.
Accordingly, as an alternative embodiment, the aforementioned sub-step 203-1 may be implemented in the following manner.
(1) The global polarization angle of the antenna carrier 200 is obtained.
Wherein the global polarization angle comprises a plurality of pending polarization angles.
(2) And calculating to obtain the electric field energy corresponding to each to-be-determined polarization angle through the polarization control unit based on the current polarization deflection angle and the polarization source rotation angle.
(3) A target polarization angle is determined from the plurality of pending polarization angles.
The target polarization angle is the polarization angle with the maximum corresponding electric field energy in the undetermined polarization angles.
In the embodiment of the present invention, in order to adjust the polarization of the antenna carrier 200 to be consistent with the polarization of the satellite, the transmission amount is maximized, and the stability of the transmission signal is ensured. 360-degree scanning (global polarization angle) can be carried out on the polarization angle of the antenna carrier 200, calculation network is carried out according to GPS and inertial measurement, and comparison calculation is carried out according to the longitude and latitude of the carrier and the longitude and latitude of a satellite, so that the polarization deflection angle and the polarization source rotation angle are obtained. If 1 degree is taken as a division, 180 undetermined polarization angles can be obtained.
Specifically, the calculation formula of the polarization declination angle is as follows:
σ＝arctan(sinφ/tgγ)
where σ is a polarization declination, Φ is a longitude difference between the antenna carrier 200 and the communication satellite 300, and γ is a latitude of the antenna carrier 200. And the calculation formula of the polarization source rotation angle is as follows:
μ＝arctan(-T1/T2)
wherein, T1And T22, calculating a parameter angle from the attitude angle of the antenna carrier 200 in the geographic position coordinate system, wherein mu is the polarization source rotation angle.
On the basis, XPIC (Cross-polarization Interference canceller) can be used for fine tuning to perform self-adaptive Cross-polarization Interference cancellation when the Cross-polarization isolation XPD is equal to (E)V2/EV1)2When it is more than 30dB, the stability of communication can be ensured, wherein, EV2/EV1Is the ratio of the homopolarized signal to the cross-polarized signal. On the basis, the polarization angle with the maximum electric field energy is the target polarization angle.
On this basis, the computer apparatus 100 is configured with a digital implementation unit for polarization calculation, and in order to express the scheme provided by the present invention more clearly, the foregoing step 204 can be implemented as follows.
And a substep 204-1 of adjusting the polarization direction of the antenna carrier 200 for the target polarization angle, the basic phase and the basic amplitude by a polarization calculation digital implementation unit based on the attenuation amplitude phase value mode to obtain the target phase and the target amplitude.
To explain the solution of the present invention more clearly, reference may be made to fig. 3, with first to fourth quadrants, corresponding to the 0-3 fronts, respectively. For the channel mapping table, the mapping table No. 0 is the same as the mapping table No. 2 after rotation, named as the mapping table A, the mapping table No. 1 is the same as the mapping table No. 3, and the command is the mapping table B. (the mapping table A and the mapping table B only need to interchange corresponding channels of the same array element horizontal polarization and vertical polarization.) and the polarization angle is not changed after rotation. In the embodiment of the present invention, take the wavefront No. 0 as an example:
(1) when c is 0 °:
H_phase＝phase_base；V_phase＝phase_base；H_amp＝amp_base_h；V_amp＝0。
(2) c > 0 DEG and & c < 45 DEG:
H_phase＝phase_base；V_phase＝phase_base；H_amp＝amp_base_h；V_amp＝amp_base_v*tan(c)。
(3) c is more than or equal to 45 degrees and c is less than 90 degrees:
H_phase＝phase_base；V_phase＝phase_base；H_amp＝amp_base_h*tan(90-c)；V_amp＝amp_base_v。
(4) c is more than or equal to 90 degrees and c is less than 135 degrees:
H_phase＝phase_base+180°；V_phase＝phase_base；H_amp＝amp_base_h*tan(c-90°)；V_amp＝amp_base_v。
(5) c is more than or equal to 135 degrees and c is less than 180 degrees:
H_phase＝phase_base+180°；V_phase＝phase_base；H_amp＝amp_base_h；V_amp＝amp_base_v*tan(180°-c)。
wherein, H _ phase is a horizontal component of the target phase, V _ phase is a vertical component of the target phase, H _ amp is a horizontal component of the target amplitude, V _ amp is a vertical component of the target phase, and c is the target polarization angle.
The more detailed embodiment is provided on the basis of the foregoing, digital logic implementation can be performed on Xilinx xc7a100tcpg236 FPGA, the actually measured control antenna panel is a KU wave band of 1024 wavefront, 0 wavefront, it should be understood that, if a 0-3 full array test is required, only the number of the wavefront and the coordinate value need to be changed, the polarization angle is unchanged after rotation, the frequency band is 17.2-20.97GHz, and the corresponding frequency point number, the array element coordinate table and the phase compensation/weighting table are defined in the logic. On the basis, the related unit FPGA logic design ports can refer to: frequency f (GHz), decimal f 1.2 2^15, converted into hexadecimal and stored in freq [23:0 ]; off-axis angles (0-90 °) in decimal theta 100, converted to hexadecimal values and stored in theta 15: 0; rotation angle (0-360 degree), decimal φ x 100, converted to hexadecimal and stored in phi 15: 0; the polarization angle (0-180), decimal c 100, is converted to hexadecimal and stored in pola [15:0 ]; the phase (0-360 deg.), decimal, modulus is converted to 360 deg. in/5.625, converted to hexadecimal format and stored in phase _ base [5:0 ]. It should be understood that the phase versus phase values need to be converted to RF chip code words 0-63, plus one every 5.625 deg. accuracy.
Under the condition of the parameters, the initial value a is 1.5, and the initial off-axis angle theta is selected1And (5) performing a gradient tracking algorithm when the micro value epsilon is 0.005 at 30 degrees, and finally calculating that the target off-axis angle is 60 degrees and the target rotation angle is 110 degrees. Assuming a carrier attitude angle less than 4.5 deg., the polarization angle may be replaced by a polarization declination angle. The polarization angle can be calculated to be 45 deg.. According to the formula, when c is more than or equal to 45 °&&H _ phase _ base when c is less than 90 °; and reading out the phase _ base [5:0] of 0-1024 array elements from the FPGA]The value of (c) is converted to decimal. Selecting the normal direction and the off-axis 60 degrees, rolling the angle at 110 degrees and the frequency at 18.2GHz, respectively reading out the calculation values, calculating the theoretical value by using the matlab and the algorithm, and referring to fig. 4 and 5, the comparison results are consistent.
The embodiment of the invention provides a beam tracking device 110, which is applied to a computer device 100, wherein the computer device 100 is in communication connection with an antenna carrier 200, and the antenna carrier 200 establishes communication connection with a communication satellite 300 through beam tracking. Referring to fig. 6, the beam tracking apparatus 110 includes:
an obtaining module 1101, configured to obtain a current state angle, a polarization source rotation angle, and a reference amplitude of the antenna carrier 200 according to a preset time interval, where the current state angle is used to represent an attitude of the antenna carrier 200, and the polarization source rotation angle is used to represent a geographical position change condition of the antenna carrier 200.
A calculating module 1102, configured to calculate a basic phase and a basic amplitude of the antenna carrier 200 according to the current state angle and the reference amplitude; and calculating the target polarization angle of the antenna carrier 200 according to the current state angle and the polarization source rotation angle.
A tracking module 1103, configured to adjust the basic phase and the basic amplitude according to the target polarization angle, so as to obtain a target phase and a target amplitude; the communication satellite 300 is beam tracked based on the target phase and the target amplitude.
Further, the current state angle includes a current beam off-axis angle, a current rotation angle, and a current polarization deviation angle. The calculation module 1102 includes:
the calculation submodule is used for respectively adjusting the current beam off-axis angle and the current rotation angle based on a gradient tracking algorithm to obtain a target beam off-axis angle and a target rotation angle of the antenna carrier 200; calculating a basic phase according to the off-axis angle of the target beam and the target rotation angle; calculating a base amplitude from the reference amplitude; and calculating a target polarization angle according to the current polarization deflection angle and the polarization source rotation angle.
Further, the computer device 100 is configured with an antenna angle generating unit and a digital beam forming unit; the calculation submodule is specifically configured to:
generating an initial off-axis angle and a current stepping amount matched with the initial off-axis angle by the antenna angle generating unit; adding the initial off-axis angle and the current stepping amount to obtain an undetermined off-axis angle; processing the initial off-axis and the angle of the axis to be determined by the digital beam forming unit to obtain an initial level and a level to be determined; calculating the current gradient of the antenna carrier 200 according to the initial level, the initial off-axis angle, the to-be-determined level and the to-be-determined off-axis angle; judging whether the current gradient is lower than a preset gradient threshold value or not; if so, taking the undetermined off-axis angle as a target beam off-axis angle; if not, taking the undetermined level as an initial level and the undetermined off-axis angle as an initial off-axis angle, and repeating the steps until the off-axis angle of the target beam is obtained.
Further, the computer device 100 is also configured with a wave control resolving unit, and the computer device 100 stores a storage compensation table entry; the calculation submodule is specifically configured to:
acquiring a reference frequency and a compensation table entry of a preset antenna carrier 200; and resolving the off-axis angle of the target beam, the target rotation angle and the reference frequency by a wave control resolving unit to obtain a basic phase based on a wave control resolving formula and a compensation table entry.
Further, the antenna carrier 200 includes a plurality of antenna elements, and the compensation table entry includes coordinates, a phase compensation value, and a phase weighting value of each antenna element; the calculation submodule is specifically configured to:
according to a wave control resolving formula:
performing wave control calculation to obtain the undetermined phase of the antenna carrier 200, wherein phase is the undetermined phase, f is the reference frequency, theta is the off-axis angle of the target beam,
the target rotation angle is set, and xi and yi are coordinates of an antenna array element i; compensating the undetermined phase according to the phase compensation value; and according to the phase weighted value, carrying out weighting processing on the undetermined phase after compensation processing to obtain a basic phase.
Further, the computer apparatus 100 is also provided with a polarization control unit; the obtaining module 1101 is specifically configured to:
obtaining a current polarization deflection angle and a polarization source rotation angle based on a global positioning system and an inertial measurement computing network;
the calculation submodule is specifically configured to:
obtaining a global polarization angle of the antenna carrier 200, wherein the global polarization angle comprises a plurality of undetermined polarization angles; based on the current polarization deflection angle and the polarization source rotation angle, calculating to obtain electric field energy corresponding to each to-be-determined polarization angle through a polarization control unit; and determining a target polarization angle from the undetermined polarization angles, wherein the target polarization angle is the polarization angle with the maximum corresponding electric field energy in the undetermined polarization angles.
Further, the computer apparatus 100 is configured with a polarization calculation digital implementation unit; the tracking module 1103 is specifically configured to:
based on the attenuation amplitude phase value mode, the polarization direction of the antenna carrier 200 is adjusted by the polarization calculation digital implementation unit for the target polarization angle, the basic phase and the basic amplitude to obtain the target phase and the target amplitude.
An embodiment of the present invention provides a computer device 100, where the computer device 100 includes a processor and a non-volatile memory storing computer instructions, and when the computer instructions are executed by the processor, the computer device 100 executes the foregoing beam tracking method. As shown in fig. 7, fig. 7 is a block diagram of a computer device 100 according to an embodiment of the present invention. Computer device 100 includes beam tracking apparatus 110, memory 111, processor 112, and communication unit 113.
The memory 111, the processor 112 and the communication unit 113 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The beam tracking apparatus 110 includes at least one software functional module which may be stored in the memory 111 in the form of software or firmware (firmware) or solidified in an Operating System (OS) of the computer device 100. The processor 112 is used for executing executable modules stored in the memory 111, such as software functional modules and computer programs included in the beam tracking apparatus 110.
The Memory 111 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like.
An embodiment of the present invention provides a readable storage medium, which includes a computer program, and when the computer program runs, the computer apparatus 100 in which the readable storage medium is located is controlled to execute the foregoing beam tracking method.
In summary, embodiments of the present invention provide a beam tracking method, an apparatus, a computer device, and a readable storage medium, where a current state angle, a polarized source rotation angle, and a reference amplitude of an antenna carrier are obtained according to a preset time interval, where the current state angle is used to represent an attitude of the antenna carrier, and the polarized source rotation angle is used to represent a geographical position change condition of the antenna carrier; calculating to obtain a basic phase and a basic amplitude of the antenna carrier according to the current state angle and the reference amplitude; calculating to obtain a target polarization angle of the antenna carrier according to the current state angle and the polarization source rotation angle; then, adjusting the basic phase and the basic amplitude according to the target polarization angle to obtain a target phase and a target amplitude; and finally, beam tracking is carried out on the communication satellite based on the target phase and the target amplitude, and stable beam tracking of the communication satellite can be realized.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A wave beam tracking method is applied to computer equipment, wherein the computer equipment is in communication connection with an antenna carrier, and the antenna carrier establishes communication connection with a communication satellite through wave beam tracking;
the method comprises the following steps:
acquiring a current state angle, a polarization source rotation angle and a reference amplitude of the antenna carrier according to a preset time interval, wherein the current state angle is used for representing the attitude of the antenna carrier, and the polarization source rotation angle is used for representing the geographical position change condition of the antenna carrier;
calculating to obtain a basic phase and a basic amplitude of the antenna carrier according to the current state angle and the reference amplitude;
calculating to obtain a target polarization angle of the antenna carrier according to the current state angle and the polarization source rotation angle;
adjusting the basic phase and the basic amplitude according to the target polarization angle to obtain a target phase and a target amplitude;
and performing beam tracking on the communication satellite based on the target phase and the target amplitude.
2. The method of claim 1, wherein the current state angle comprises a current beam off-axis angle, a current rotation angle, and a current polarization declination angle;
the step of calculating a fundamental phase and a fundamental amplitude of the antenna carrier according to the current state angle and the reference amplitude includes:
respectively adjusting the current beam off-axis angle and the current rotation angle based on a gradient tracking algorithm to obtain a target beam off-axis angle and a target rotation angle of the antenna carrier;
calculating the base phase from the target beam off-axis angle and the target rotation angle;
calculating the base amplitude from the reference amplitude;
the step of calculating the target polarization angle of the antenna carrier according to the current state angle and the polarization source rotation angle includes:
and calculating the target polarization angle according to the current polarization declination angle and the polarization source rotation angle.
3. The method of claim 2, wherein the computer device is configured with an antenna angle generating unit and a digital beam forming unit;
adjusting the current off-axis angle of the beam based on a gradient tracking algorithm to obtain the off-axis angle of the target beam, wherein the step comprises the following steps:
generating an initial off-axis angle and a current stepping amount matched with the initial off-axis angle by the antenna angle generating unit;
adding the initial off-axis angle and the current stepping amount to obtain an undetermined off-axis angle;
processing the initial off-axis and the to-be-determined off-axis angle through the digital beam forming unit to obtain an initial level and a to-be-determined level;
calculating the current gradient of the antenna carrier according to the initial level, the initial off-axis angle, the undetermined level and the undetermined off-axis angle;
judging whether the current gradient is lower than a preset gradient threshold value or not;
if so, taking the undetermined off-axis angle as the target beam off-axis angle;
if not, taking the undetermined level as the initial level and the undetermined off-axis angle as the initial off-axis angle, and repeating the steps until the target beam off-axis angle is obtained.
4. The method of claim 2, wherein the computer device is further configured with a wave control resolving unit, and the computer device stores a storage compensation table entry;
the step of calculating the base phase from the target beam off-axis angle and the target rotation angle includes:
acquiring a reference frequency preset for the antenna carrier and the compensation table entry;
and resolving the target beam off-axis angle, the target rotation angle and the reference frequency by the wave control resolving unit to obtain the basic phase based on a wave control resolving formula and the compensation table entry.
5. The method of claim 4, wherein the antenna carrier comprises a plurality of antenna elements, and the compensation table entry comprises coordinates, a phase compensation value and a phase weighting value of each antenna element;
the step of obtaining the basic phase by resolving the target beam off-axis angle, the target rotation angle and the reference frequency through the wave control resolving unit based on the wave control resolving formula and the compensation table entry includes:
according to the wave control resolving formula:
performing wave control calculation to obtain an undetermined phase of the antenna carrier, wherein phase is the undetermined phase, f is the reference frequency, theta is the off-axis angle of the target beam,
for the target rotation angle, xi and yi are coordinates of an antenna array element i;
compensating the undetermined phase according to the phase compensation value;
and according to the phase weighted value, carrying out weighting processing on the undetermined phase after compensation processing to obtain the basic phase.
6. The method of claim 2, wherein the computer device is further configured with a polarization control unit;
the step of obtaining the current polarization deflection angle and the polarization source rotation angle includes:
acquiring the current polarization deflection angle and the polarization source rotation angle based on a global positioning system and an inertial measurement computing network;
the step of calculating the target polarization angle according to the current polarization declination and the polarization source rotation angle comprises the following steps:
obtaining a global polarization angle of the antenna carrier, wherein the global polarization angle comprises a plurality of undetermined polarization angles;
based on the current polarization deflection angle and the polarization source rotation angle, calculating to obtain electric field energy corresponding to each undetermined polarization angle through the polarization control unit;
and determining a target polarization angle from the plurality of undetermined polarization angles, wherein the target polarization angle is the polarization angle with the maximum corresponding electric field energy in the plurality of undetermined polarization angles.
7. The method of claim 1, wherein the computer device is configured with a polarization calculation digital implementation unit;
the step of adjusting the basic phase and the basic amplitude according to the target polarization angle to obtain a target phase and a target amplitude includes:
and adjusting the polarization direction of the antenna carrier by the polarization calculation digital implementation unit according to the target polarization angle, the basic phase and the basic amplitude based on the mode of attenuating amplitude phase values so as to obtain the target phase and the target amplitude.
8. The beam tracking device is applied to computer equipment, wherein the computer equipment is in communication connection with an antenna carrier, and the antenna carrier is in communication connection with a communication satellite through beam tracking;
the device comprises:
the antenna carrier comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a current state angle, a polarization source rotation angle and a reference amplitude of the antenna carrier according to a preset time interval, the current state angle is used for representing the attitude of the antenna carrier, and the polarization source rotation angle is used for representing the geographical position change condition of the antenna carrier;
the calculation module is used for calculating and obtaining a basic phase and a basic amplitude of the antenna carrier according to the current state angle and the reference amplitude; calculating to obtain a target polarization angle of the antenna carrier according to the current state angle and the polarization source rotation angle;
the tracking module is used for adjusting the basic phase and the basic amplitude according to the target polarization angle to obtain a target phase and a target amplitude; and performing beam tracking on the communication satellite based on the target phase and the target amplitude.
9. A computer device comprising a processor and a non-volatile memory having computer instructions stored thereon, wherein the computer instructions, when executed by the processor, cause the computer device to perform the beam tracking method of any one of claims 1-7.
10. A readable storage medium, comprising a computer program which, when executed, controls a computer device on which the readable storage medium is located to perform the beam tracking method of any one of claims 1-7.
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