Method, device and system for improving time division transceiving isolation time utilization rate in lift-off motion platform forwarding scene

Abstract

The invention discloses a method, a device and a system for improving the time division transceiving isolation time utilization rate in a lift-off motion platform forwarding scene, and belongs to the field of electromagnetic compatibility, and the method comprises the steps: S1, calculating the total delay tau at the current moment according to the linear distance between a lift-off platform and a ground transceiving station; s2, the receiving time slot R is equal to the transmitting time slot T, typical values of T and R are determined according to specific application, and the small cycle number n is determined according to the typical values and tau; s3, calculating a protection time slot N according to the refresh cycle Tc and the radial speed v of the lift-off platform relative to the ground transceiver station; s4, calculating correction values of the receiving time slot R and the transmitting time slot T; and according to T, R and N results obtained through calculation in the step S1 to the step S4, periodic application is carried out, so that the time utilization rate can be improved under the condition of time-division transceiving isolation under the condition of delay tau. On the basis of analyzing the physical characteristics of the lift-off motion forwarding scene, the time utilization rate is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic compatibility, and more specifically, to a method, device and system for improving the time utilization rate of time-division transceiver isolation in a scenario of an airborne moving platform for relaying. Background Art

[0002] An application scenario diagram of using an airborne moving platform for relaying to overcome the earth's curvature radius and expand the line-of-sight distance is as Figure 1 shown.

[0003] The ground transceiver station receives and processes satellite signals, sends the signals to the airborne moving relay platform, and the airborne platform amplifies the signals and radiates them to the target. When the airborne platform radiates, the signals will reach the receiving aperture surface of the ground transceiver station at the same time, affecting the receiving effect. The existing method of eliminating the influence by time division is as Figure 2 shown.

[0004] Figure 2 In , R represents the receive time slot; T represents the transmit time slot; N represents the idle time slot; τ represents the time for the signal to be sent from the ground transceiver station to the airborne platform and for part of the signal energy to return to the ground transceiver station after the airborne platform relays it.

[0005] The existing method receives signals in the R time slot and sends out the received signals in the T time slot, and requires that the idle time slot N is greater than τ, so that the signals returned from the airborne platform do not fall into the receiving window of the ground transceiver station, achieving compatibility. Moreover, the existing method requires N to be greater than τ, so for scenarios with a larger τ, the time utilization rate is relatively low. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method, device and system for improving the time utilization rate of time-division transceiver isolation in a scenario of an airborne moving platform for relaying. Based on the analysis of the physical characteristics of the airborne moving relay scenario, a method for improving the time utilization rate of time-division transceiver isolation is proposed, effectively improving the time utilization rate.

[0007] The purpose of the present invention is achieved through the following solutions:

[0008] A method for improving the time utilization rate of time-division transceiver isolation in a scenario of an airborne moving platform for relaying, comprising the following steps:

[0009] S1. Calculate the total delay τ at the current moment according to the straight-line distance between the airborne platform and the ground transceiver station;

[0010] S2. The receive time slot R and the transmit time slot T are equal. Determine the typical values of T and R according to specific applications, and determine the number of small cycles n according to the typical values and τ;

[0011] S3. According to the refresh period T cCalculate the protection time slot N based on the radial velocity v of the airborne platform relative to the ground transceiver station;

[0012] S4. Calculate the correction values of the receive time slot R and the transmit time slot T;

[0013] Periodically apply the T, R, and N results calculated according to steps S1 to S4, so as to improve the time utilization rate under the condition of time-division transceiver isolation in the case of delay τ.

[0014] Further, in step S1, the specific steps for calculating the total delay at the current moment according to the straight-line distance between the airborne platform and the ground transceiver station are as follows:

[0015] Calculate the total delay τ at the current moment according to the straight-line distance between the airborne platform and the ground transceiver station according to the following formula:

[0016]

[0017] Among them, c represents the speed of light, and d represents the distance between the ground relay station and the airborne platform.

[0018] Further, in step S2, the specific steps for determining the number of small cycles n according to the typical value and τ are as follows:

[0019] Determine the number of small cycles n according to the typical value and τ according to the following formula: Round up.

[0020] Further, in step S3, according to the refresh period T c and the radial velocity v of the airborne platform relative to the ground transceiver station to calculate the protection time slot N, the specific steps are as follows:

[0021] According to the refresh period T c and the radial velocity v of the airborne platform relative to the ground transceiver station, calculate the protection time slot N according to the following formula:

[0022]

[0023] Among them, v is the speed of the UAV, and T c is the parameter refresh period.

[0024] Further, in step S4, the specific steps for calculating the correction value of the transceiver time slot are as follows:

[0025] Calculate the correction values of the receive time slot R and the transmit time slot T according to the following formula: Among them, τ, N, and n are all known, T and R are equal, so as to calculate the correction values of the transmit time slot T and the receive time slot R.

[0026] An apparatus for improving the time utilization rate of time-division transceiver isolation in a forwarding scenario of a lifting motion platform, comprising a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is loaded by the processor, the method described in any one of the above is executed.

[0027] A system for improving the time utilization rate of time-division transceiver isolation in a forwarding scenario of a lifting motion platform, comprising the apparatus for improving the time utilization rate of time-division transceiver isolation in a forwarding scenario of a lifting motion platform as described above.

[0028] The beneficial effects of the present invention include:

[0029] The method of the embodiment of the present invention makes the proportion of the transmission time window in the total time close to 50%, approaching the theoretical limit, thereby effectively improving the time utilization rate.

[0030] Compared with the existing method, in the case of a large delay τ, the method of the embodiment of the present invention can achieve a time utilization rate close to the theoretical limit (50%). According to Figure 1 the scenario shown, assuming that the lifting platform is 150 kilometers away from the ground transceiver station, the typical values of the receive and transmit time slots are 200 us. The signal round-trip delay τ between the ground transceiver station and the lifting platform is 1 ms. According to the traditional method, the time utilization rate of the transmission time slot in the total time is about 14%. According to the method of the embodiment of the present invention, under the condition that the speed v of the lifting platform is 50 m / s and the parameter refresh period T c is 10 s, it is calculated that the protection time slot N is about 6.6 us, the minimum number of cycles n is 3, the corrected receive and transmit time slots T and R are about 164 us, and the time utilization rate of the transmission time slot in the total time is about 49%. There is a significant improvement compared with the 14% time utilization rate of the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0032] Figure 1 It is a schematic diagram of a forwarding scenario of a lifting platform;

[0033] Figure 2 It is a schematic diagram of the existing time-division method;

[0034] Figure 3 It is a signal timing schematic diagram of the method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] All features disclosed in all embodiments in this specification, or steps in all methods or processes implicitly disclosed, except for mutually exclusive features and / or steps, can be combined and / or extended, replaced in any way.

[0036] The specific implementation process of the present invention is as follows:

[0037] In a preferred embodiment, it particularly relates to improving the time utilization rate of time division transceiver isolation in the forwarding scenario of the airborne motion platform. In Figure 1 In the shown airborne platform forwarding scenario, when the distance d between the ground forwarding station and the airborne platform is relatively far, the time for the signal to travel from the ground transceiver station to the signal to return to the ground forwarding station: τ = 2d / c. When the distance is relatively far, the time utilization rate of the traditional method is relatively low. For example, when d is 150 kilometers, τ is 1 millisecond.

[0038] In the concept of the present invention, taking full advantage of the characteristic of the relatively long total delay time, multiple alternating transceiver time slots are designed within the large delay period τ. By designing parameters, it is ensured that the transceiver is staggered. According to the motion characteristics of the airborne platform, the parameters are set periodically to ensure that transceiver isolation can still be achieved after the distance between the ground transceiver station and the airborne forwarding platform changes. The timing schematic diagram of the present invention is as Figure 3 shown.

[0039] Multiple small cycles are designed within the total delay period τ. T, R, and N are one small cycle. Since the total delay changes with the change of the distance between the reconnaissance forwarding vehicle and the unmanned aerial vehicle, the number of small cycles within the large cycle is uncertain and is calculated by the upper computer according to a certain time refresh period T c Calculate. The received data is cached in the R time slot, and the data cached in the previous R cycle is sent in the T time slot. Since the target is moving, the total delay τ changes between two calculations and refreshes T c During this period, the N time slot is designed for protection buffering to prevent the returned signal T from falling into the R time slot of the ground transceiver station. In actual calculation, assuming that the total delay calculated according to the distance at a certain moment is τ, the number of small cycles within the total delay period is n, and T, R, and N respectively represent the time of each time slot, the following relationship should be satisfied: This can ensure that during the period between two parameter refreshes, the airborne platform moves a certain distance, and the interference signals returned in the previous and subsequent cycles will not fall into the receiving time slot of the reconnaissance forwarding vehicle. The protection time slot N is determined according to the motion characteristics of the airborne platform.

[0040] Specifically, the calculation strategy steps of the present invention are as follows:

[0041] Step a), calculate the current total delay according to the straight-line distance between the airborne platform and the ground transceiver station: τ = 2d / c;

[0042] Step b), the receiving time slot R and the transmitting time slot T are equal. Determine the typical values of T and R according to specific applications, and determine the number of small cycles n according to the typical values and τ: Ceiling;

[0043] Step c), according to the refresh period T c and the radial velocity v of the airborne platform relative to the ground transceiver station, calculate the protection time slot N: v is the velocity of the UAV, and T c is the parameter refresh period;

[0044] Step d), calculate the correction value of the transceiver time slot: Where τ, N, and n are all known, T and R are equal, and the correction values of the transceiver time slots T and R can be calculated.

[0045] According to the results of T, R, and N calculated by the above steps and applying them periodically, a high time utilization rate can be achieved under the condition of time-division transceiver isolation in the case of large delay τ.

[0046] In other embodiments of the present invention, a certain project conducts flight tests according to the Figure 1 shown scenario. The distance between the ground transceiver station and the airborne relay platform is about 150 kilometers, and the typical velocity of the airborne platform is 50 m / s. According to the method of the present invention, time-division transceiver isolation design is carried out, and the system transceiver works normally. The time occupancy rate of the transmission time slot is about 49%, which is greatly improved compared with the traditional method.

[0047] It should be noted that within the protection scope defined in the claims of the present invention, the following embodiments can all be combined and / or extended and replaced in any logical manner from the above specific embodiments, such as the disclosed technical principles, disclosed technical features, or implicitly disclosed technical features.

[0048] Embodiment 1

[0049] A method for improving the time utilization rate of time-division transceiver isolation in the forwarding scenario of an airborne moving platform, including the following steps:

[0050] S1, calculate the total delay τ at the current moment according to the straight-line distance between the airborne platform and the ground transceiver station;

[0051] S2, the receive time slot R and the transmit time slot T are equal. Determine the typical values of T and R according to specific applications, and determine the small cycle number n according to the typical values and τ;

[0052] S3, according to the refresh period T c and the radial velocity v of the airborne platform relative to the ground transceiver station, calculate the protection time slot N;

[0053] S4, calculate the correction values of the receive time slot R and the transmit time slot T;

[0054] The results of T, R, and N calculated according to steps S1 to S4 are applied periodically, so as to improve the time utilization rate under the condition of time-division transceiver isolation with a delay of τ.

[0055] Embodiment 2

[0056] Based on Embodiment 1, in step S1, calculating the total delay at the current moment according to the straight-line distance between the airborne platform and the ground transceiver station specifically includes the following sub-steps:

[0057] Calculate the total delay τ at the current moment according to the straight-line distance between the airborne platform and the ground transceiver station according to the following formula:

[0058] τ = 2d / c;

[0059] Where c represents the speed of light and d represents the distance between the ground relay station and the airborne platform.

[0060] Embodiment 3

[0061] Based on Embodiment 2, in step S2, determining the number of small cycles n according to the typical value and τ specifically includes the following sub-steps:

[0062] Determine the number of small cycles n according to the typical value and τ according to the following formula: Round up.

[0063] Embodiment 4

[0064] Based on Embodiment 3, in step S3, calculating the protection time slot N according to the refresh period T c and the radial velocity v of the airborne platform relative to the ground transceiver station specifically includes the following sub-steps:

[0065] According to the refresh period T c and the radial velocity v of the airborne platform relative to the ground transceiver station, calculate the protection time slot N according to the following formula:

[0066]

[0067] Where v is the speed of the unmanned aerial vehicle and T c is the parameter refresh period.

[0068] Embodiment 5

[0069] Based on Embodiment 4, in step S4, calculating the correction value of the transceiver time slot specifically includes the following sub-steps:

[0070] Calculate the correction values of the receive time slot R and the transmit time slot T according to the following formula: Where τ, N, and n are all known, and T and R are equal, so as to calculate the correction values of the transmit time slot T and the receive time slot R.

[0071] Example 6

[0072] An apparatus for improving the time utilization rate of time-division transceiver isolation in a forwarding scenario of a lifting motion platform, comprising a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is loaded by the processor, the method described in any one of Examples 1 to 5 is executed.

[0073] Example 7

[0074] A system for improving the time utilization rate of time-division transceiver isolation in a forwarding scenario of a lifting motion platform, comprising the apparatus for improving the time utilization rate of time-division transceiver isolation in a forwarding scenario of a lifting motion platform described in Example 6.

[0075] The units involved in the embodiments of the present invention can be implemented in software or in hardware, and the described units can also be provided in a processor. Among them, the names of these units do not constitute a limitation to the unit itself in some cases.

[0076] According to one aspect of the embodiments of the present invention, there is provided a computer program product or a computer program, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the methods provided in the above various alternative implementation manners.

[0077] As another aspect, the embodiments of the present invention further provide a computer-readable medium, which may be included in the electronic device described in the above embodiments; or may exist alone without being assembled into the electronic device. The above computer-readable medium carries one or more programs, and when the one or more programs are executed by an electronic device, the electronic device implements the methods described in the above embodiments.

Claims

1. A method for improving the utilization rate of time-division transmission and reception isolation time in a forwarding scenario of an aerial moving platform, characterized in that: The following steps are involved: S1, calculate the total delay τ at the current moment according to the straight-line distance between the launch platform and the ground transceiver station; S2, the receiving time slot R is equal to the transmitting time slot T. The typical values ​​of T and R are determined according to the specific application, and the number of small cycles n is determined according to the typical values ​​and τ; S3, according to the refresh cycle T c The protection time slot N is calculated based on the radial velocity v of the launch platform relative to the ground transceiver station; S4, calculating the correction values ​​of the receiving time slot R and the transmitting time slot T; The T, R, and N results calculated in steps S1 to S4 are applied periodically, thereby ensuring that the time utilization rate can be improved under the condition of time division transmission and reception isolation under the condition of delay τ.

2. The method for improving the utilization rate of time-division transmission and reception isolation time in the forwarding scenario of the aerial motion platform according to claim 1 is characterized in that: In step S1, the total delay at the current moment is calculated according to the straight-line distance between the lift platform and the ground transceiver station, which specifically includes the following sub-steps: According to the straight-line distance between the launch platform and the ground transceiver station, the total delay τ at the current moment is calculated according to the following formula: Among them, c represents the speed of light, and d represents the distance between the ground relay station and the launch platform.

3. The method for improving the utilization rate of time-division transmission and reception isolation time in the forwarding scenario of the aerial motion platform according to claim 2, characterized in that: In step S2, the method of determining the number of small cycles n according to the typical value and τ specifically includes the following sub-steps: Determine the number of small cycles n according to the typical value and τ using the following formula: Round up.

4. The method for improving the utilization rate of time-division transmission and reception isolation time in the forwarding scenario of the aerial motion platform according to claim 3 is characterized in that: In step S3, the refresh cycle T c The protection time slot N is calculated based on the radial velocity v of the launch platform relative to the ground transceiver station, which specifically includes the following sub-steps: According to the refresh cycle T c The protection time slot N is calculated based on the radial velocity v of the launch platform relative to the ground transceiver station according to the following formula: Where v is the speed of the drone, T c It is the parameter refresh period.

5. The method for improving the utilization rate of time-division transmission and reception isolation time in the forwarding scenario of the aerial motion platform according to claim 4 is characterized in that: In step S4, the calculation of the transmit / receive time slot correction value specifically includes the following sub-steps: The correction values ​​of the receiving time slot R and the transmitting time slot T are calculated according to the following formula: Among them, τ, N, and n are all known, and T and R are equal, so the correction values ​​of the transmission time slot T and the reception time slot R are calculated.

6. A device for improving the utilization rate of time-division transmission and reception isolation time in a forwarding scenario of an aerial moving platform, characterized in that: The method comprises a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is loaded by the processor, the method according to any one of claims 1 to 5 is executed.

7. A system for improving the utilization rate of time-division transmission and reception isolation time in a forwarding scenario of an aerial moving platform, characterized in that: It includes the device for improving the utilization rate of time-division reception and transmission isolation time in the forwarding scenario of the aerial moving platform as described in claim 6.

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