Satellite direct connection-based adaptive adjustment of transmission power method and device

Abstract

The application discloses a method and device for adaptively adjusting transmitting power based on satellite direct connection. In the method, real-time rain attenuation corresponding to a three-frequency beacon in a downlink is determined, an over-determined equation set is determined according to the real-time rain attenuation corresponding to the three-frequency beacon, rainfall intensity and effective path length of a rain layer are determined by solving the over-determined equation set, a rain attenuation coefficient and a rain attenuation index corresponding to an uplink are obtained, rain attenuation corresponding to the uplink is determined according to the rainfall intensity, the effective path length of the rain layer, the rain attenuation coefficient and the rain attenuation index, and transmitting power is adaptively determined according to the rain attenuation corresponding to the uplink. The application inverses the rainfall intensity and the effective path length of the rain layer by using observation data of the three-frequency beacon, can directly determine the rain attenuation corresponding to the uplink, and thus ground equipment can directly adaptively determine transmitting power according to the determined rain attenuation, thereby improving flexibility of communication between the ground equipment and a satellite.

Description

Technical Field

[0001] This application relates to the technical field of direct connection between satellite and ground equipment, and in particular to an adaptive adjustment method and apparatus for transmission power based on direct satellite connection. Background Technology

[0002] Currently, in rainy or snowy weather, communication between ground equipment and satellites needs to take into account the factor of rain attenuation. That is, rainfall will cause the transmission attenuation of electromagnetic wave signals, and ground equipment needs to successfully send signals to satellites despite the transmission attenuation caused by rainfall.

[0003] In existing technologies, rain attenuation can be determined by a fixed rain attenuation coefficient and the equivalent path length of rainfall (effective path length of the rain layer), thereby determining the transmission power of the transmitted signal. However, rainfall is a random process, and the amount of precipitation may change at any time. Therefore, it is difficult to accurately predict real-time rain attenuation in existing technologies, making it difficult to effectively achieve communication between ground equipment and satellites based on real-time rain attenuation.

[0004] There is currently no effective solution to the technical problem in the existing technology that makes it difficult to accurately predict real-time rain attenuation, thus making it difficult to effectively achieve communication between ground equipment and satellites based on real-time rain attenuation. Summary of the Invention

[0005] The embodiments of this disclosure provide a method and apparatus for adaptively adjusting transmission power based on direct satellite connection, which at least solves the technical problem in the prior art that it is difficult to accurately predict real-time rain attenuation, thus making it difficult to effectively achieve communication between ground equipment and satellite according to real-time rain attenuation.

[0006] According to one aspect of the present disclosure, an adaptive transmission power adjustment method based on satellite direct connection is provided, comprising: determining real-time rain attenuation corresponding to a tri-frequency beacon in the downlink, the tri-frequency beacon including radio signals under three standard frequency bands; determining an overdetermined set of equations based on the real-time rain attenuation corresponding to the tri-frequency beacon, the overdetermined set of equations representing the relationship between real-time rain attenuation and rainfall intensity and effective path length of the rain layer under the three standard frequency bands; determining the rainfall intensity and effective path length of the rain layer by solving the overdetermined set of equations; obtaining the rain attenuation coefficient and rain attenuation index corresponding to the uplink; determining the rain attenuation corresponding to the uplink based on the rainfall intensity, effective path length of the rain layer, rain attenuation coefficient and rain attenuation index; and adaptively determining the transmission power based on the rain attenuation corresponding to the uplink.

[0007] According to another aspect of the present disclosure, a storage medium is also provided, the storage medium including a stored program, wherein, when the program is executed, a processor performs any of the methods described above.

[0008] According to another aspect of the present disclosure, an adaptive transmission power adjustment device based on satellite direct connection is also provided, comprising: a real-time rain attenuation determination module, configured to determine the real-time rain attenuation corresponding to a three-frequency beacon in the downlink, the three-frequency beacon including radio signals under three standard frequency bands; an equation determination module, configured to determine an overdetermined equation set based on the real-time rain attenuation corresponding to the three-frequency beacon, the overdetermined equation set representing the relationship between real-time rain attenuation and rainfall intensity and effective path length of the rain layer under the three standard frequency bands; a solution module, configured to determine the rainfall intensity and effective path length of the rain layer by solving the overdetermined equation set; an acquisition module, configured to acquire the rain attenuation coefficient and rain attenuation index corresponding to the uplink; a rain attenuation module, configured to determine the rain attenuation corresponding to the uplink based on the rainfall intensity, effective path length of the rain layer, rain attenuation coefficient, and rain attenuation index; and an adaptive adjustment module, configured to adaptively determine the transmission power based on the rain attenuation corresponding to the uplink.

[0009] According to another aspect of the present disclosure, an adaptive transmit power adjustment device based on satellite direct connection is also provided, comprising: a processor; and a memory connected to the processor, for providing the processor with instructions to process the following steps: determining real-time rain attenuation in the downlink corresponding to a tri-frequency beacon, the tri-frequency beacon including radio signals under three standard frequency bands; determining an overdetermined set of equations based on the real-time rain attenuation corresponding to the tri-frequency beacon, the overdetermined set of equations representing the relationship between real-time rain attenuation and rainfall intensity and effective path length of the rain layer under the three standard frequency bands; determining the rainfall intensity and effective path length of the rain layer by solving the overdetermined set of equations, and obtaining the rain attenuation coefficient and rain attenuation index corresponding to the uplink; determining the rain attenuation corresponding to the uplink based on the rainfall intensity, effective path length of the rain layer, rain attenuation coefficient and rain attenuation index; and adaptively determining the transmit power based on the rain attenuation corresponding to the uplink.

[0010] In this embodiment, rainfall intensity and effective path length of the rain layer are derived using observation data from the tri-frequency beacon (i.e., real-time rain attenuation corresponding to the tri-frequency beacon in the downlink). Since the uplink can reuse both rainfall intensity and effective path length, the rain attenuation corresponding to the uplink is determined based on the determined rainfall intensity, effective path length, and the directly searchable uplink rain attenuation coefficient and rain attenuation index. This allows ground equipment to adaptively determine the transmission power based on the determined rain attenuation. This embodiment enables ground equipment to determine rain attenuation in real time and adaptively adjust the transmission power, improving the flexibility of communication between ground equipment and satellites. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings: Figure 1 This is a schematic diagram of the satellite communication system according to Embodiment 1 of this disclosure; Figure 2A This is a schematic diagram of the hardware architecture of the satellite according to Embodiment 1 of this disclosure; Figure 2B This is a schematic diagram of the hardware architecture of the ground equipment according to Embodiment 1 of this disclosure; Figure 3 This is a flowchart illustrating the adaptive transmission power adjustment method based on satellite direct connection according to the first aspect of Embodiment 1 of this disclosure; Figure 4 This is a schematic flowchart illustrating the process of solving for rainfall intensity and effective path intensity of rain layers according to the first aspect of Embodiment 1 of this disclosure; Figure 5 This is a schematic diagram of an adaptive transmission power adjustment device based on satellite direct connection according to the first aspect of Embodiment 2 of this disclosure; Figure 6 This is a schematic diagram of an adaptive transmission power adjustment device based on satellite direct connection according to the first aspect of Embodiment 3 of this disclosure. Detailed Implementation

[0012] To enable those skilled in the art to better understand the technical solutions of this disclosure, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0013] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0014] Example 1

[0015] According to this embodiment, an embodiment of an adaptive adjustment of transmission power based on direct satellite connection is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0016] Figure 1 A schematic diagram of a satellite direct connection system according to this embodiment is shown. The system includes ground equipment and a satellite, wherein the ground equipment can communicate with the satellite.

[0017] Figure 2A Further shown Figure 1 A schematic diagram of the hardware architecture of the satellite. (Reference) Figure 2A As shown, the satellite includes an integrated electronic system, which comprises a processor, a memory, a bus management module, and a communication interface. The memory is connected to the processor, allowing the processor to access the memory, read program instructions stored in the memory, and read or write data to the memory. The bus management module is connected to the processor and also to a bus such as a CAN bus. Thus, the processor can communicate with onboard peripherals connected to the bus through the bus managed by the bus management module. Furthermore, the processor also communicates with devices such as cameras, star sensors, telemetry and command transponders, and data transmission equipment via the communication interface. Those skilled in the art will understand that… Figure 2A The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, a satellite system may also include... Figure 2A The more or fewer components shown, or having the same Figure 2A The different configurations shown.

[0018] Figure 2B Further shown Figure 1 A schematic diagram of the hardware architecture of the ground equipment. (Reference) Figure 2B As shown, the ground equipment may include one or more processors (processors may include, but are not limited to, microprocessors such as MCUs or programmable logic devices such as FPGAs), a memory for storing data, a transmission device for communication functions, and an input / output interface. The memory, transmission device, and input / output interface are connected to the processor via a bus. In addition, it may also include a display, keyboard, and cursor control device connected to the input / output interface. Those skilled in the art will understand that... Figure 2B The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, the ground system may also include... Figure 2BThe more or fewer components shown, or having the same Figure 2B The different configurations shown.

[0019] It should be noted that, Figure 2A and Figure 2B One or more processors and / or other data processing circuits shown herein may generally be referred to as "data processing circuitry". This data processing circuitry may be embodied, in whole or in part, in software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuitry may be a single, independent processing module, or may be integrated, in whole or in part, into any other element in a computing device. As involved in embodiments of this disclosure, the data processing circuitry serves as processor control (e.g., selection of a variable resistor termination path connected to an interface).

[0020] Figure 2A and Figure 2B The memory shown can be used to store software programs and modules for application software, such as the program instruction / data storage device corresponding to the satellite-based adaptive transmission power adjustment method in this embodiment of the present disclosure. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory, thereby implementing the aforementioned satellite-based adaptive transmission power adjustment method for the application. The memory may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory.

[0021] It should be noted here that, in some optional embodiments, the above... Figure 2A and Figure 2B The device shown may include hardware elements (including circuitry), software elements (including computer code stored on a computer-readable medium), or a combination of both hardware and software elements. It should be noted that... Figure 2A and Figure 2B This is only one instance of a specific particular instance, and is intended to illustrate the types of components that may exist in the aforementioned devices.

[0022] Under the aforementioned operating environment, according to the first aspect of this embodiment, an adaptive transmission power adjustment method based on direct satellite connection is provided. This method comprises... Figure 1 The ground equipment shown is implemented. Figure 3 A flowchart illustrating the method is shown below. (Refer to...) Figure 3 As shown, the method includes: S302: Determine the real-time rain attenuation in the downlink corresponding to the tri-frequency beacon, which includes radio signals in three standard frequency bands; S304: Based on the real-time rain attenuation corresponding to the three-frequency beacons, determine the overdetermined equation set, which is used to represent the relationship between real-time rain attenuation, rainfall intensity, and effective path length of the rain layer in the three standard frequency bands; S306: Determine the rainfall intensity and effective path length of the rain layer by solving the overdetermined system of equations; S308: Obtain the rain attenuation coefficient and rain attenuation index corresponding to the uplink; S310: Determine the rain attenuation corresponding to the uplink based on rainfall intensity, effective path length of the rain layer, rain attenuation coefficient, and rain attenuation index; and S312: Adaptively determine the transmit power based on the rain attenuation corresponding to the uplink.

[0023] In this method, the ground equipment first acquires the real-time rain attenuation (S302) corresponding to the tri-frequency beacon in the downlink. The tri-frequency beacon includes radio signals under three standard frequency bands.

[0024] A tri-frequency beacon refers to a radio signal transmitted from a satellite to ground equipment in three different standard frequency bands (or frequencies). In this embodiment, for example, the three different standard frequency bands of the tri-frequency beacon can be set as: f1 (Ku band, such as 12 Hz), f2 (Ka band, such as 22 Hz), and f3 (V band, such as 40 Hz). The three standard frequency bands corresponding to the tri-frequency beacon can be manually set by relevant technical personnel.

[0025] The aforementioned real-time rain attenuation includes three specific rain attenuation values, determined by the three signals from the three-frequency beacons. Specifically, ground equipment can determine the received signal level corresponding to the three-frequency beacons during clear weather. , and And the current (in rainy weather) received signal level corresponding to the tri-frequency beacon. , and Then, based on the received signal level corresponding to the tri-frequency beacon during clear weather and the current received signal level corresponding to the tri-frequency beacon, the real-time rain attenuation corresponding to the tri-frequency beacon is determined. ~ The expression is: , =1,2,3 In other words, for real-time rain attenuation in one standard frequency band of a three-frequency beacon In other words: the received signal level of the corresponding standard frequency band (radio signal) that can be obtained on a clear day. The received signal level of the corresponding standard frequency band obtained during the current rainy weather. The difference between them (which can represent signal attenuation) is used to determine it.

[0026] Then, the ground equipment can determine the overdetermined equation set (S304) based on the real-time rain attenuation corresponding to the three-frequency beacons. The overdetermined equation set is used to represent the relationship between real-time rain attenuation, rainfall intensity, and effective path length of the rain layer under the three standard frequency bands.

[0027] Ground equipment determines the rainfall intensity and the effective path length of the rain layer by solving an overdetermined set of equations (S306).

[0028] In other words, ground equipment can determine the corresponding overdetermined equation set by identifying the real-time rain attenuation corresponding to the three-frequency beacons. This overdetermined equation set contains three equations, each representing the relationship between real-time rain attenuation, rainfall intensity, and effective path length of the rain layer under a standard frequency band. The real-time rain attenuation is known; the solution is needed to determine the rainfall intensity and the effective path length of the rain layer. By solving this overdetermined equation set, the ground equipment can determine the rainfall intensity and the effective path length of the rain layer.

[0029] In the above steps, the ground equipment mainly determines the rainfall intensity and the effective path length of the rain layer by using the signals of the tri-frequency beacons in the downlink. In subsequent steps, the ground equipment determines the rain attenuation in the uplink by using the rainfall intensity and the effective path length of the rain layer determined by the downlink, thereby determining how it should send signals to the satellite in the uplink.

[0030] Then, the ground equipment acquires the rain attenuation coefficient and rain attenuation index corresponding to the uplink (S308). Based on the rainfall intensity, the effective path length of the rain layer, and the rain attenuation coefficient and rain attenuation index corresponding to the uplink, the ground equipment determines the rain attenuation corresponding to the uplink (S310). Based on the rain attenuation corresponding to the uplink, the ground equipment adaptively determines the transmission power (S312).

[0031] Specifically, ground equipment can determine the rain attenuation corresponding to the uplink using the following formula.

[0032]

[0033] in, This represents the rain attenuation (in dB) corresponding to the uplink, i.e., the real-time rain attenuation of the uplink obtained by this method. This represents the rain attenuation coefficient corresponding to the uplink. This represents the rain attenuation index corresponding to the uplink. Both the rain attenuation coefficient and the rain attenuation index can be determined based on the ITU-R P.838 standard. Rainfall intensity R and effective path length of the rain layer are also considered. This is determined through steps S302 to S306, allowing the ground equipment to determine the rain attenuation corresponding to the uplink. Among them, the rain attenuation coefficients of different frequency bands Rainfall attenuation index There are some differences, but this method can determine the rain attenuation of any frequency band in the uplink.

[0034] Furthermore, satellites can also use this method to determine the rainfall intensity R and the effective path length of the rain layer. This allows for the determination of rain attenuation in any frequency band, enabling adjustments to the transmitter power at different frequencies.

[0035] Then, the ground equipment can determine the rain attenuation corresponding to the uplink. The transmit power is adaptively determined.

[0036] Specifically, ground equipment can determine the base transmission power. Then, based on the base transmission power And the determined rain attenuation corresponding to the uplink. Determine the uplink transmit power Basic transmit power This refers to the base transmit power of the uplink under clear weather conditions. The uplink transmit power can be determined using the following formula. :

[0037] In addition, the basic transmission power It can be determined using the following formula:

[0038] in, This represents the minimum signal reception threshold for the satellite receiver. This is the total signal loss excluding rain attenuation. It can include, for example, link transmission loss, antenna loss, and polarization loss. It is usually a fixed value that can be calibrated manually.

[0039] As described in the background section, in the prior art, rain attenuation can be determined by a rain attenuation coefficient and the equivalent path length of rainfall (effective path length of the rain layer), thereby determining the transmission power of the transmitted signal. However, rainfall is a random process, and the amount of precipitation may change at any time. Therefore, in the prior art, it is difficult to accurately predict the real-time rain attenuation, and thus it is difficult to effectively realize communication between ground equipment and satellite according to the corresponding rain attenuation.

[0040] In view of this, in this embodiment, the rainfall intensity and effective path length of the rain layer are derived by utilizing the observation data of the three-frequency beacons (i.e., the real-time rain attenuation corresponding to the three-frequency beacons in the downlink). Since the uplink can reuse both the rainfall intensity and the effective path length of the rain layer, the rain attenuation corresponding to the uplink is determined based on the determined rainfall intensity, the effective path length of the rain layer, and the uplink rain attenuation coefficient and rain attenuation index, which can be directly searched. Therefore, the ground equipment can directly and adaptively determine the transmission power according to the determined rain attenuation. This embodiment enables the ground equipment to determine the rain attenuation in real time and adaptively adjust the transmission power in real time, thereby improving the flexibility of communication between the ground equipment and the satellite.

[0041] The overdetermined equation set consists of three equations, each of which represents the relationship between real-time rain attenuation, rainfall intensity, and effective path length of the rain layer, determined by the corresponding radio signals.

[0042] The expression for the overdetermined system of equations is:

[0043] in, , as well as These are the real-time rain attenuation values ​​corresponding to the three standard frequency bands. , as well as These are the rain attenuation coefficients corresponding to the three standard frequency bands. Rainfall intensity, The effective path length of the rain layer. , as well as These are the rain attenuation indices corresponding to the three standard frequency bands.

[0044] Specifically, the formula for rain attenuation per unit distance is:

[0045] in, The rain attenuation coefficient, Rainfall intensity, This is the rain attenuation index.

[0046] Therefore, the formula for total rainfall attenuation is:

[0047] By substituting the obtained real-time rain attenuation into the above formula, the following overdetermined equations can be obtained.

[0048]

[0049] in, , as well as These are the real-time rain attenuation values ​​corresponding to the three standard frequency bands. , as well as These are the rain attenuation coefficients corresponding to the three standard frequency bands, respectively. Rainfall intensity, The effective path length of the rain layer. , as well as These are the rainfall attenuation indices corresponding to the three standard frequency bands. The rainfall attenuation coefficient and rainfall attenuation index can be obtained from tables based on the ITU-R standards, according to the corresponding frequency band or frequency. Therefore, the unknown quantity in the overdetermined equations is the rainfall intensity. and effective path length of rain layer By solving this overdetermined system of equations, the rainfall intensity can be determined. and effective path length of rain layer .

[0050] Specifically, a weighted least squares approach can be used to construct an objective function for solving the overdetermined system of equations, and the extreme values ​​of the objective function can be iteratively solved using Newton's method to determine the rainfall intensity. and effective path length of rain layer The following will explain in detail.

[0051] Optionally, the operation of determining rainfall intensity and effective path length of rain layer by solving overdetermined equations includes: determining the objective function based on the overdetermined equations; and determining the rainfall intensity and effective path length of rain layer based on the objective function.

[0052] Specifically, the objective function based on the overdetermined system of equations can be constructed according to the principle of weighted least squares:

[0053] in, , as well as These are three preset weights. Since higher frequency results in greater sensitivity to rainfall intensity, [the following can be done / can be implemented]. Set to 1, Set to 1.5. Set to 2.

[0054] Then, based on the objective function described above, the rainfall intensity and the effective path length of the rain layer can be determined. That is, the rainfall intensity that minimizes the objective function J (i.e., makes the value of the objective function J approach 0) can be found. and the effective path length of the rain layer This is used to determine the rainfall intensity and the effective path length of the rain layer. In subsequent steps, we will discuss how to determine the rainfall intensity that minimizes the aforementioned objective function J. and the effective path length of the rain layer To explain.

[0055] Optionally, the operation of determining the rainfall intensity and the effective path length of the rain layer according to the objective function includes: determining the relational equation representing the relationship between rainfall intensity and the effective path length of the rain layer based on the partial derivative of the objective function with respect to rainfall intensity; initializing the initial rainfall intensity value; substituting the initial rainfall intensity value into the relational equation to obtain the initial length value corresponding to the effective path length of the rain layer; substituting the initial rainfall intensity value and the initial length value into the objective function to determine the error value; iteratively updating the rainfall intensity value and determining the error value corresponding to the corresponding rainfall intensity value in each iteration; and outputting the rainfall intensity and the effective path length of the rain layer if the error value is lower than a preset threshold.

[0056] Specifically, we need to find the rainfall intensity that minimizes the objective function J. and the effective path length of the rain layer This is to find the extremum of the objective function J. Therefore, we can take the partial derivatives of the objective function J to obtain the following equation:

[0057] by For example, by expanding the partial derivatives, we can obtain the following formula:

[0058] Further simplification yields the following formula:

[0059] Then extract the formula above. And organize, to obtain about The expression for rainfall intensity (i.e., the expression for rainfall intensity) With the effective path length of the rain layer The equation relating them is shown below:

[0060] Therefore, by giving a rainfall intensity Substituting the value of into the above relational equation, we can obtain the corresponding effective path length of the rain layer. The value of .

[0061] Then, the rainfall intensity can be determined using Newton's iteration method. and effective path length of rain layer Solve the problem.

[0062] For details, please refer to Figure 4 As shown, Figure 4 This embodiment illustrates the use of Newton's iteration method to measure rainfall intensity. and effective path length of rain layer A flowchart illustrating the solution process.

[0063] First, step 1: Initialize rainfall intensity Initial rainfall intensity value .

[0064] Then, step 2: set the initial rainfall intensity value Substituting into the above relational equation, we can obtain the corresponding effective path length of the rain layer. initial length value .

[0065] Step 3: Set the initial rainfall intensity value and initial length value Substitute these values ​​into the objective function J to determine the corresponding function values. Since the objective is to make the objective function J equal to 0, the determined corresponding function values ​​are the error values.

[0066] Step 4: Iteratively update the rainfall intensity using the following formula. Value:

[0067] Among them, in the formula and These represent the rainfall intensity before and after the update in a single iteration.

[0068] In each iteration, steps 2 and 3 are repeated; that is, in each iteration, the updated rainfall intensity is... The value and the corresponding effective path length of the rain layer The value of is substituted into the objective function J to determine the error value.

[0069] Step 5: If the determined error value is lower than the preset threshold, adjust the corresponding rainfall intensity. The value and the corresponding effective path length of the rain layer The value of is taken as the optimal solution. This yields the rainfall intensity. and effective path length of rain layer The aforementioned preset threshold can be manually set to a value close to 0.

[0070] In addition, refer to Figure 1As shown, according to a third aspect of this embodiment, a storage medium is provided. The storage medium includes a stored program, wherein, when the program is executed, a processor performs any of the methods described above.

[0071] Therefore, according to this embodiment, by utilizing the observation data of the three-frequency beacons (i.e., the real-time rain attenuation corresponding to the three-frequency beacons in the downlink), the rainfall intensity and the effective path length of the rain layer are derived. Since the uplink can reuse both the rainfall intensity and the effective path length of the rain layer, the rain attenuation corresponding to the uplink is determined based on the determined rainfall intensity, the effective path length of the rain layer, and the uplink rain attenuation coefficient and rain attenuation index, which can be directly searched. Thus, the ground equipment can directly and adaptively determine the transmission power according to the determined rain attenuation. This embodiment enables the ground equipment to determine the rain attenuation in real time and adaptively adjust the transmission power in real time, improving the flexibility of communication between the ground equipment and the satellite.

[0072] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0073] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0074] Example 2

[0075] Figure 5 An adaptive transmit power adjustment device based on satellite direct connection according to the first aspect of this embodiment is shown, which corresponds to the method described according to the first aspect of Embodiment 1. Reference Figure 5As shown, the device includes: a real-time rain attenuation determination module 510, used to determine the real-time rain attenuation corresponding to the tri-frequency beacon in the downlink, the tri-frequency beacon including radio signals under three standard frequency bands; an equation determination module 520, used to determine an overdetermined equation set based on the real-time rain attenuation corresponding to the tri-frequency beacon, the overdetermined equation set representing the relationship between real-time rain attenuation and rainfall intensity and effective path length of the rain layer under the three standard frequency bands; a solution module 530, used to determine the rainfall intensity and effective path length of the rain layer by solving the overdetermined equation set; an acquisition module 540, used to acquire the rain attenuation coefficient and rain attenuation index corresponding to the uplink; a rain attenuation module 550, used to determine the rain attenuation corresponding to the uplink based on the rainfall intensity, effective path length of the rain layer, rain attenuation coefficient, and rain attenuation index; and an adaptive adjustment module 560, used to adaptively determine the transmit power based on the rain attenuation corresponding to the uplink.

[0076] Optionally, the expression for the overdetermined system of equations is:

[0077] in, , as well as These are the real-time rain attenuation values ​​corresponding to the three standard frequency bands. , as well as These are the rain attenuation coefficients corresponding to the three standard frequency bands. Rainfall intensity, The effective path length of the rain layer. , as well as These are the rain attenuation indices corresponding to the three standard frequency bands.

[0078] Optionally, the solver module 530 is used to determine the objective function based on the overdetermined system of equations, the expression of which is:

[0079] in, , as well as These are three preset weights; and the rainfall intensity and effective path length of the rain layer are determined based on the objective function.

[0080] Optionally, the solver module 530 is used to determine the relational equation representing the relationship between rainfall intensity and the effective path length of the rain layer based on the partial derivative of the objective function with respect to rainfall intensity; initialize the initial rainfall intensity value; substitute the initial rainfall intensity value into the relational equation to obtain the initial length value corresponding to the effective path length of the rain layer; substitute the initial rainfall intensity value and the initial length value into the objective function to determine the error value; iteratively update the value of rainfall intensity and determine the error value corresponding to the corresponding rainfall intensity value in each iteration; and output the rainfall intensity and the effective path length of the rain layer if the error value is lower than a preset threshold.

[0081] Therefore, according to this embodiment, by utilizing the observation data of the three-frequency beacons (i.e., the real-time rain attenuation corresponding to the three-frequency beacons in the downlink), the rainfall intensity and the effective path length of the rain layer are derived. Since the uplink can reuse both the rainfall intensity and the effective path length of the rain layer, the rain attenuation corresponding to the uplink is determined based on the determined rainfall intensity, the effective path length of the rain layer, and the uplink rain attenuation coefficient and rain attenuation index, which can be directly searched. Thus, the ground equipment can directly and adaptively determine the transmission power according to the determined rain attenuation. This embodiment enables the ground equipment to determine the rain attenuation in real time and adaptively adjust the transmission power in real time, improving the flexibility of communication between the ground equipment and the satellite.

[0082] Example 3

[0083] Figure 6 An adaptive transmit power adjustment device based on satellite direct connection according to the first aspect of this embodiment is shown, which corresponds to the method described according to the first aspect of Embodiment 1. Reference Figure 6 As shown, the device includes: a processor 610; and a memory 620 connected to the processor 610, for providing the processor 610 with instructions to process the following steps: determining the real-time rain attenuation corresponding to a tri-frequency beacon in the downlink, the tri-frequency beacon including radio signals in three standard frequency bands; determining an overdetermined set of equations based on the real-time rain attenuation corresponding to the tri-frequency beacon, the overdetermined set of equations representing the relationship between real-time rain attenuation and rainfall intensity and effective path length of the rain layer in the three standard frequency bands; determining the rainfall intensity and effective path length of the rain layer by solving the overdetermined set of equations; obtaining the rain attenuation coefficient and rain attenuation exponent corresponding to the uplink; determining the rain attenuation corresponding to the uplink based on the rainfall intensity, effective path length of the rain layer, rain attenuation coefficient, and rain attenuation exponent; and adaptively determining the transmit power based on the rain attenuation corresponding to the uplink.

[0084] Optionally, the expression for the overdetermined system of equations is:

[0085] in, , as well as These are the real-time rain attenuation values ​​corresponding to the three standard frequency bands. , as well as These are the rain attenuation coefficients corresponding to the three standard frequency bands. Rainfall intensity, The effective path length of the rain layer. , as well as These are the rain attenuation indices corresponding to the three standard frequency bands.

[0086] Optionally, the operation of determining rainfall intensity and effective path length of the rain layer by solving an overdetermined system of equations includes: Based on the overdetermined system of equations, the objective function is determined, and its expression is as follows:

[0087] in, , as well as These are the three preset weights; and Based on the objective function, determine the rainfall intensity and the effective path length of the rain layer.

[0088] Optionally, the operations for determining rainfall intensity and effective path length of the rain layer based on the objective function include: Based on the partial derivative of the objective function with respect to rainfall intensity, a relational equation representing the relationship between rainfall intensity and the effective path length of the rain layer is determined. Initialize the initial rainfall intensity value; Substituting the initial rainfall intensity value into the relational equation yields the initial length value corresponding to the effective path length of the rain layer; Substitute the initial rainfall intensity and initial length values ​​into the objective function to determine the error value. The rainfall intensity value is updated iteratively, and the error value corresponding to the corresponding rainfall intensity value is determined in each iteration; If the error value is lower than the preset threshold, the rainfall intensity and the effective path length of the rain layer will be output.

[0089] Therefore, according to this embodiment, by utilizing the observation data of the three-frequency beacons (i.e., the real-time rain attenuation corresponding to the three-frequency beacons in the downlink), the rainfall intensity and the effective path length of the rain layer are derived. Since the uplink can reuse both the rainfall intensity and the effective path length of the rain layer, the rain attenuation corresponding to the uplink is determined based on the determined rainfall intensity, the effective path length of the rain layer, and the uplink rain attenuation coefficient and rain attenuation index, which can be directly searched. Thus, the ground equipment can directly and adaptively determine the transmission power according to the determined rain attenuation. This embodiment enables the ground equipment to determine the rain attenuation in real time and adaptively adjust the transmission power in real time, improving the flexibility of communication between the ground equipment and the satellite.

[0090] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0091] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0092] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0093] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0094] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0095] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0096] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for adaptively adjusting transmit power based on direct satellite connection, characterized in that, include: Determine the real-time rain attenuation in the downlink corresponding to the tri-frequency beacon, wherein the tri-frequency beacon includes radio signals under three standard frequency bands; Based on the real-time rain attenuation corresponding to the three-frequency beacons, an overdetermined set of equations is determined. The overdetermined set of equations is used to represent the relationship between real-time rain attenuation, rainfall intensity, and effective path length of the rain layer under the three standard frequency bands. By solving the overdetermined system of equations, the rainfall intensity and the effective path length of the rain layer are determined. Obtain the rain attenuation coefficient and rain attenuation index corresponding to the uplink; The rainfall attenuation corresponding to the uplink is determined based on the rainfall intensity, the effective path length of the rain layer, the rainfall attenuation coefficient, and the rainfall attenuation index. as well as The transmit power is adaptively determined based on the rain attenuation corresponding to the uplink. The overdetermined equation set includes three equations, each of which represents the relationship between the real-time rain attenuation determined by the corresponding radio signal and the rainfall intensity and the effective path length of the rain layer.

2. The method according to claim 1, characterized in that, The operation of determining rainfall intensity and effective path length of rain layers by solving the overdetermined system of equations includes: Based on the aforementioned overdetermined system of equations, the objective function is determined; Based on the objective function, the rainfall intensity and the effective path length of the rain layer are determined.

3. The method according to claim 2, characterized in that, The operation of determining the rainfall intensity and the effective path length of the rain layer according to the objective function includes: Based on the partial derivative of the objective function with respect to the rainfall intensity, a relational equation representing the relationship between the rainfall intensity and the effective path length of the rain layer is determined; Initialize the initial rainfall intensity value; Substituting the initial rainfall intensity value into the relational equation yields the initial length value corresponding to the effective path length of the rain layer; Substitute the initial rainfall intensity value and the initial length value into the objective function to determine the error value; The rainfall intensity value is iteratively updated, and an error value corresponding to the corresponding rainfall intensity value is determined in each iteration. If the error value is lower than a preset threshold, the rainfall intensity and the effective path length of the rain layer are output.

4. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, the method described in any one of claims 1 to 3 is performed by a processor.

5. A device for adaptively adjusting transmission power based on direct satellite connection, characterized in that, include: The real-time rain attenuation determination module is used to determine the real-time rain attenuation corresponding to the tri-frequency beacon in the downlink, wherein the tri-frequency beacon includes radio signals under three standard frequency bands; The equation determination module is used to determine an overdetermined equation set based on the real-time rain attenuation corresponding to the three-frequency beacons. The overdetermined equation set is used to represent the relationship between real-time rain attenuation, rainfall intensity, and effective path length of the rain layer under the three standard frequency bands. The solver module is used to determine the rainfall intensity and the effective path length of the rain layer by solving the overdetermined system of equations. The acquisition module is used to obtain the rain attenuation coefficient and rain attenuation index corresponding to the uplink; The rain attenuation module is used to determine the rain attenuation corresponding to the uplink based on the rainfall intensity, the effective path length of the rain layer, the rain attenuation coefficient, and the rain attenuation index. as well as An adaptive adjustment module is used to adaptively determine the transmission power based on the rain attenuation corresponding to the uplink. The overdetermined equation set includes three equations, each of which represents the relationship between the real-time rain attenuation determined by the corresponding radio signal and the rainfall intensity and the effective path length of the rain layer.

6. The apparatus according to claim 5, characterized in that, The solution module is used to determine the objective function based on the overdetermined system of equations; and to determine the rainfall intensity and the effective path length of the rain layer based on the objective function.

7. The apparatus according to claim 6, characterized in that, The solution module is used to determine the relational equation representing the relationship between the rainfall intensity and the effective path length of the rain layer based on the partial derivative of the objective function with respect to the rainfall intensity; initialize the initial rainfall intensity value; and substitute the initial rainfall intensity value into the relational equation to obtain the initial length value corresponding to the effective path length of the rain layer. The initial rainfall intensity value and the initial length value are substituted into the objective function to determine the error value; the rainfall intensity value is iteratively updated, and the error value corresponding to the corresponding rainfall intensity value is determined in each iteration; if the error value is lower than a preset threshold, the rainfall intensity and the effective path length of the rain layer are output.

8. A device for adaptively adjusting transmit power based on direct satellite connection, characterized in that, include: processor; as well as A memory, connected to the processor, for providing the processor with instructions to perform the following processing steps: Determine the real-time rain attenuation in the downlink corresponding to the tri-frequency beacon, wherein the tri-frequency beacon includes radio signals under three standard frequency bands; Based on the real-time rain attenuation corresponding to the three-frequency beacons, an overdetermined set of equations is determined. The overdetermined set of equations is used to represent the relationship between real-time rain attenuation, rainfall intensity, and effective path length of the rain layer under the three standard frequency bands. By solving the overdetermined system of equations, the rainfall intensity and the effective path length of the rain layer can be determined. Obtain the rain attenuation coefficient and rain attenuation index corresponding to the uplink; The rainfall attenuation corresponding to the uplink is determined based on the rainfall intensity, the effective path length of the rain layer, the rainfall attenuation coefficient, and the rainfall attenuation index. And adaptively determine the transmit power based on the rain attenuation corresponding to the uplink, wherein the overdetermined equation set includes three equations, each of which is used to represent the relationship between the real-time rain attenuation determined by the corresponding radio signal and the rainfall intensity and the effective path length of the rain layer.

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