Frequency deviation compensation system, method and device for satellite and gateway

Abstract

The present application discloses a frequency offset compensation system, method and device for a satellite and a gateway, including: the system is also configured to perform the following operations: a first gateway calculates a first frequency offset corresponding to a first communication signal to be sent; the first gateway compensates the first communication signal for frequency offset based on a second frequency offset received from a second gateway in a previous cycle and the first frequency offset, and generates a second communication signal; the first gateway sends the second communication signal to the second gateway via a satellite; the second gateway calculates a third frequency offset corresponding to the second communication signal based on the second communication signal, and sends the third frequency offset to the first gateway via a satellite; and the second gateway compensates the second communication signal based on the third frequency offset, thereby generating a third communication signal.

Description

Technical Field

[0001] The present application relates to the field of satellite communication technology, and in particular to a frequency offset compensation system, method and device for satellites and gateways. Background Art

[0002] With the development of satellite communication needs, and in order to meet the needs of high-speed data transmission in remote areas without base station coverage, achieving communication coverage in remote areas through low-orbit satellites has become an important issue in future mobile communications.

[0003] However, when a gateway sends a communication signal to a satellite, frequency deviation usually occurs. Frequency deviation refers to the deviation or drift of the frequency of a communication signal during transmission. During the communication process between a gateway and a satellite, frequency deviation is mainly caused by the inaccurate frequency of the local oscillator at the transmitter (i.e., gateway) and the receiver (i.e., satellite) of the communication signal. Moreover, frequency deviation may cause distortion of the communication signal and deterioration of communication quality.

[0004] In the case where the satellite is used as a relay end, the first gateway is used as a transmitting end, and the second gateway is used as a receiving end, the prior art mainly compensates the first gateway and the second gateway twice. Specifically, first, the first gateway estimates the first frequency offset according to the satellite ephemeris, and uses the first frequency offset to pre-compensate the communication signal. Then, the first gateway sends the compensated communication signal to the second gateway via the satellite. Finally, the second gateway estimates the residual frequency offset according to the pilot signal, and uses the residual frequency offset to compensate.

[0005] Although the prior art has performed compensation twice using the first gateway and the second gateway, if the residual frequency offset is too large, in the case of 5G using narrowband subcarriers, it is easy for the second gateway to find it difficult to calculate the accurate residual frequency offset through the pilot signal, thereby failing to achieve accurate frequency offset compensation.

[0006] In view of the technical problem that although the first gateway and the second gateway have been used to perform compensation twice in the above-mentioned prior art, if the residual frequency offset is too large, in the case of 5G using narrowband subcarriers, it is easy for the second gateway to find it difficult to calculate the accurate residual frequency offset through the pilot signal, thereby failing to achieve accurate frequency offset compensation, no effective solution has been proposed so far. Summary of the invention

[0007] The embodiments of the present disclosure provide a frequency offset compensation system, method and apparatus for a satellite and a gateway, so as to at least solve the technical problem in the prior art that, although compensation has been performed twice using a first gateway and a second gateway, if the residual frequency offset is too large, in the case of 5G using narrowband subcarriers, it is easy for the second gateway to find it difficult to calculate the accurate residual frequency offset through a pilot signal, thereby failing to achieve accurate frequency offset compensation.

[0008] According to one aspect of an embodiment of the present disclosure, a frequency offset compensation system for a satellite and a gateway is provided, comprising a first gateway, a satellite and a second gateway, wherein the first gateway is communicatively connected to the second gateway via the satellite, and the system is further configured to perform the following operations: the first gateway calculates a first frequency offset corresponding to a first communication signal to be sent; the first gateway compensates for the frequency offset of the first communication signal based on the second frequency offset received from the second gateway in the previous cycle and the first frequency offset, and generates a second communication signal; the first gateway sends the second communication signal to the second gateway via the satellite; the second gateway calculates a third frequency offset corresponding to the second communication signal based on the second communication signal, and sends the third frequency offset to the first gateway via the satellite; and the second gateway compensates for the second communication signal based on the third frequency offset, thereby generating a third communication signal.

[0009] According to another aspect of an embodiment of the present disclosure, a frequency offset compensation method for a satellite and a gateway is also provided, including: a first gateway calculates a first frequency offset corresponding to a first communication signal to be sent; the first gateway compensates for the frequency offset of the first communication signal based on the second frequency offset received from the second gateway in the previous cycle and the first frequency offset, and generates a second communication signal; the first gateway sends the second communication signal to the second gateway via a satellite; the second gateway calculates a third frequency offset corresponding to the second communication signal based on the second communication signal, and sends the third frequency offset to the first gateway via a satellite; and the second gateway compensates for the second communication signal based on the third frequency offset, thereby generating a third communication signal.

[0010] According to another aspect of an embodiment of the present disclosure, a storage medium is further provided, the storage medium including a stored program, wherein when the program is running, a processor executes any one of the methods described above.

[0011] According to another aspect of the embodiments of the present disclosure, a frequency offset compensation device for a satellite and a gateway is provided, including: a first frequency offset calculation module, used for the first gateway to calculate a first frequency offset corresponding to a first communication signal to be sent; a second communication signal generation module, used for the first gateway to compensate for the frequency offset of the first communication signal based on the second frequency offset received from the second gateway in the previous cycle and the first frequency offset, and generate a second communication signal; a second communication signal sending module, used for the first gateway to send the second communication signal to the second gateway via a satellite; a third frequency offset determination module, used for the second gateway to calculate a third frequency offset corresponding to the second communication signal based on the second communication signal, and send the third frequency offset to the first gateway via a satellite; and a third communication signal generation module, used for the second gateway to compensate for the second communication signal based on the third frequency offset, thereby generating a third communication signal.

[0012] According to another aspect of an embodiment of the present disclosure, a frequency offset compensation device for a satellite and a gateway is provided, including: a processor; and a memory connected to the processor, for providing the processor with instructions for processing the following processing steps: a first gateway calculates a first frequency offset corresponding to a first communication signal to be sent; the first gateway compensates for the frequency offset of the first communication signal based on the second frequency offset received from the second gateway in the previous cycle and the first frequency offset, and generates a second communication signal; the first gateway sends the second communication signal to the second gateway via a satellite; the second gateway calculates a third frequency offset corresponding to the second communication signal based on the second communication signal, and sends the third frequency offset to the first gateway via a satellite; and the second gateway compensates for the second communication signal based on the third frequency offset, thereby generating a third communication signal.

[0013] The present application provides a frequency offset compensation system for satellites and gateways. And the system is configured to perform the following operations: First, the first gateway calculates the first frequency offset corresponding to the first communication signal to be sent. Then, the first gateway compensates the first communication signal for frequency offset based on the second frequency offset received from the second gateway in the previous cycle and the first frequency offset, and generates a second communication signal. Further, the first gateway sends the second communication signal to the second gateway via a satellite. Afterwards, the second gateway calculates a third frequency offset corresponding to the second communication signal based on the second communication signal, and sends the third frequency offset to the first gateway via a satellite. Finally, the second gateway compensates the second communication signal based on the third frequency offset, thereby generating a third communication signal.

[0014] Since in the technical solution disclosed in the present application, the first gateway calculates the first frequency offset, and the first gateway compensates the first communication signal for frequency offset based on the second frequency offset corresponding to the previous cycle and the first frequency offset, thereby generating a second communication signal, it can be seen from the above that the second communication signal generated in the present application is compensated for frequency offset twice. Among them, the first frequency offset corresponding to the first communication signal to be sent calculated by the first gateway is equivalent to the public frequency offset compensation based on the ephemeris, and the second frequency offset corresponding to the previous cycle received by the first gateway is equivalent to the private frequency offset compensation for the pilot, so compared with the prior art, the technical solution disclosed in the present application not only performs multiple frequency offset compensations for the first communication signal, but also performs private frequency offset compensation for the first communication signal based on the pilot on the basis of the public frequency offset compensation based on the ephemeris for the first communication signal.

[0015] Furthermore, after the first gateway generates the second communication signal, the second gateway also calculates the third frequency offset corresponding to the second communication signal, and the second gateway also compensates the second communication signal based on the third frequency offset, so that the third communication signal finally generated is equivalent to three times of frequency offset compensation. Therefore, compared with the prior art, the third communication signal generated by the second gateway in the present application is more accurate.

[0016] This solves the technical problem in the prior art that, although compensation has been performed twice using the first gateway and the second gateway, if the residual frequency deviation is too large, in the case of 5G using narrowband subcarriers, it is easy for the second gateway to find it difficult to calculate the accurate residual frequency deviation through the pilot signal, thereby failing to achieve accurate frequency deviation compensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0018] Figure 1 is a schematic diagram of a communication system of a satellite, a first gateway station, and a second gateway station according to Embodiment 1 of the present application;

[0019] Figure 2A is a schematic diagram of the hardware architecture of the satellite according to Embodiment 1 of the present application;

[0020] Figure 2B is a schematic diagram of the hardware architecture of the first gateway and the second gateway according to Embodiment 1 of the present application;

[0021] Figure 3 is a flow chart of a frequency offset compensation method for a satellite and a gateway according to Embodiment 1 of the present application;

[0022] Figure 4 is a structural schematic diagram of the PID control module according to Example 1 of the present application;

[0023] Figure 5 is a flow chart of an overall method for frequency offset compensation for satellites and gateways according to Embodiment 1 of the present application;

[0024] Figure 6 is a schematic diagram of a frequency offset compensation device for a satellite and a gateway according to Embodiment 2 of the present application; and

[0025] Figure 7 It is a schematic diagram of a frequency offset compensation device for a satellite and a gateway station according to Example 3 of the present application. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only embodiments of a part of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present disclosure.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0028] Example 1

[0029] According to this embodiment, a method embodiment for frequency offset compensation for satellites and gateways is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0030] Figure 11 is a schematic diagram of a communication system of a satellite 120, a first gateway station 110, and a second gateway station 130 according to Embodiment 1 of the present application. Figure 1 As shown, the system 10 includes a first gateway 110, a satellite 120, and a second gateway 130. The first gateway 110 is used to calculate a first frequency offset corresponding to a first communication signal to be sent. The first signal station 110 is also used to perform frequency offset compensation on the first communication signal based on the second frequency offset and the first frequency offset received from the second gateway in the previous cycle, and generate a second communication signal. The first signal station 110 is also used to send the second communication signal to the second signal station 130 via the satellite 120.

[0031] The second gateway 130 is used to calculate a third frequency offset corresponding to the second communication signal based on the second communication signal, and send the third frequency offset to the first gateway 110 via the satellite. The second gateway 130 is used to compensate the second communication signal based on the third frequency offset, thereby generating a third communication signal. The second gateway 130 is also used to send the third frequency offset to the first gateway 110 via the satellite 120.

[0032] Figure 2A It further shows Figure 1 Schematic diagram of the hardware architecture of satellite 120. Figure 2A As shown, satellite 120 includes an integrated electronic system, which includes: a processor, a memory, a bus management module and a communication interface. The memory is connected to the processor, so that the processor can access the memory, read the program instructions stored in the memory, read data from the memory or write data to the memory. The bus management module is connected to the processor and is also connected to a bus such as a CAN bus. Therefore, the processor can communicate with the satellite-borne peripherals connected to the bus through the bus managed by the bus management module. In addition, the processor is also connected to communication devices such as cameras, star sensors, measurement and control transponders, and data transmission equipment via the communication interface. It can be understood by those skilled in the art that Figure 2A The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 2A More or fewer components as shown, or with Figure 2A Different configurations are shown.

[0033] Figure 2B It further shows Figure 1 FIG. 1 is a schematic diagram of the hardware architecture of the first gateway station 110 and the second gateway station 130. Figure 2BAs shown, the first gateway 110 and the second gateway 130 may include one or more processors (the processor may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory for storing data, a transmission device for communication functions, and an input / output interface. The memory, the transmission device, and the input / output interface are connected to the processor via a bus. In addition, a display, a keyboard, and a cursor control device connected to the input / output interface may also be included. A person skilled in the art can understand that Figure 2B The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 2B More or fewer components as shown, or with Figure 2B Different configurations are shown.

[0034] It should be noted that Figure 2A and Figure 2B The one or more processors and / or other data processing circuits shown in the figure may generally be referred to as "data processing circuitry" herein. The data processing circuitry may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. In addition, the data processing circuitry may be a single independent processing module, or may be incorporated in whole or in part into any of the other elements in the computing device. As involved in the embodiments of the present disclosure, the data processing circuitry serves as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0035] Figure 2A and Figure 2B The memory shown in the figure can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the frequency offset compensation method for satellites and gateways in the 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, that is, the frequency offset compensation method for satellites and gateways of the above-mentioned application program is realized. The memory may include a high-speed random access memory and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory.

[0036] It should be noted that, in some optional embodiments, the above Figure 2A and Figure 2B The devices shown may include hardware elements (including circuits), software elements (including computer code stored on a computer-readable medium), or a combination of both hardware and software elements. Figure 2A and Figure 2B This is merely one example of a particular embodiment and is intended to illustrate the types of components that may be present in the above described apparatus.

[0037] In the above operating environment, according to the first aspect of this embodiment, a frequency offset compensation method for a satellite and a gateway is provided. The method comprises: Figure 1 The system 10 shown in FIG. Figure 3 A schematic diagram showing the process of the method is shown in FIG. Figure 3 As shown, the method includes:

[0038] S302: The first gateway calculates a first frequency offset corresponding to a first communication signal to be sent;

[0039] S304: The first gateway performs frequency offset compensation on the first communication signal based on the second frequency offset received from the second gateway in the previous period and the first frequency offset, and generates a second communication signal;

[0040] S306: The first gateway sends the second communication signal to the second gateway via a satellite;

[0041] S308: The second gateway calculates a third frequency offset corresponding to the second communication signal based on the second communication signal, and sends the third frequency offset to the first gateway via the satellite; and

[0042] S310: The second gateway compensates the second communication signal based on the third frequency offset to generate a third communication signal.

[0043] Specifically, first, the first gateway 110 calculates a first frequency offset corresponding to a first communication signal to be sent (S302). The first gateway 110 calculates the first frequency offset corresponding to the first communication signal, for example, by using the ephemeris of the satellite 120. And the specific operation of the first gateway 110 calculating the first frequency offset corresponding to the first communication signal based on the ephemeris of the satellite 120 includes: first, the first gateway 110 calculates a fourth frequency offset according to the ephemeris information of the satellite 120, the position information of the first gateway 110, and the carrier frequency between the first gateway 110 and the satellite 120. The fourth frequency offset may be, for example, a first downlink feeder link Doppler sampling frequency offset. Then, the first gateway 110 calculates a fifth frequency offset according to the ephemeris information of the satellite 120, the reference point position information, and the carrier frequency between the second gateway 130 and the satellite 120. The fifth frequency offset may be, for example, a second downlink feeder link Doppler sampling frequency offset. And wherein, the operation of determining the second downlink feeder link Doppler sampling frequency offset includes: selecting the beam coverage center position of the satellite as a reference point, and the reference point is uniquely determined by the satellite position and the satellite beam pointing. When the second gateway station 130 is located at the reference point, the second downlink feeder link Doppler sampling frequency offset is calculated. Finally, the first gateway station 110 determines the first frequency offset based on the fourth frequency offset and the fifth frequency offset. Wherein, the first frequency offset is the sum of the fourth frequency offset and the fifth frequency offset.

[0044] Then, the first gateway 110 performs frequency offset compensation on the first communication signal based on the second frequency offset received from the second gateway in the previous cycle and the first frequency offset, and generates a second communication signal (S304). Specifically, first, the first gateway 110 determines frequency offset compensation information based on the internal PID control module and the second frequency offset. Then, the first gateway 110 performs frequency offset compensation on the first communication signal according to the frequency offset compensation information and the first frequency offset, thereby generating a second communication signal. The above content will be described in detail later, so it will not be repeated here.

[0045] Furthermore, the first gateway 110 transmits the second communication signal to the second gateway 130 via the satellite 120 ( S306 ). For example, the first gateway 110 transmits the second communication signal to the satellite 120 , and then the satellite 120 transmits the second communication signal to the second gateway 130 .

[0046] Afterwards, the second gateway 130 calculates a third frequency offset corresponding to the second communication signal based on the second communication signal, and sends the third frequency offset to the first gateway 110 via the satellite (S308). For example, the second gateway 130 calculates the third frequency offset based on the pilot signal in the second communication signal. Then, the second gateway 130 sends the third frequency offset to the first gateway 110, so that the first gateway 110 can further perform frequency offset compensation on the communication signal of the next cycle based on the third frequency offset in the next cycle.

[0047] Finally, the second gateway 130 compensates the second communication signal based on the third frequency offset, thereby generating a third communication signal ( S310 ).

[0048] As described in the background technology, when the satellite is used as a relay end, the first gateway is used as a transmitting end, and the second gateway is used as a receiving end, the prior art mainly compensates the first gateway and the second gateway twice. Specifically, first, the first gateway estimates the first frequency offset according to the satellite ephemeris, and uses the first frequency offset to pre-compensate the communication signal. Then, the first gateway sends the compensated communication signal to the second gateway via the satellite. Finally, the second gateway estimates the residual frequency offset according to the pilot signal, and uses the residual frequency offset to compensate.

[0049] Although the prior art has performed compensation twice using the first gateway and the second gateway, if the residual frequency offset is too large, in the case of 5G using narrowband subcarriers, it is easy for the second gateway to find it difficult to calculate the accurate residual frequency offset through the pilot signal, thereby failing to achieve accurate frequency offset compensation.

[0050] In view of this, the present application provides a frequency offset compensation system for satellites and gateways. And because in the technical solution disclosed in the present application, the first gateway calculates the first frequency offset, and the first gateway compensates the first communication signal for frequency offset based on the second frequency offset corresponding to the previous cycle and the first frequency offset, thereby generating a second communication signal, it can be seen from the above that the second communication signal generated in the present application is frequency offset compensated twice. Among them, the first frequency offset corresponding to the first communication signal to be sent calculated by the first gateway is equivalent to the public frequency offset compensation based on the ephemeris, and the second frequency offset corresponding to the previous cycle received by the first gateway is equivalent to the private frequency offset compensation for the pilot, so compared with the prior art, the technical solution disclosed in the present application not only performs multiple frequency offset compensations for the first communication signal, but also performs private frequency offset compensation for the first communication signal based on the pilot on the basis of the public frequency offset compensation based on the ephemeris for the first communication signal.

[0051] Furthermore, after the first gateway generates the second communication signal, the second gateway also calculates the third frequency offset corresponding to the second communication signal, and the second gateway also compensates the second communication signal based on the third frequency offset, so that the third communication signal finally generated is equivalent to three times of frequency offset compensation. Therefore, compared with the prior art, the third communication signal generated by the second gateway in the present application is more accurate.

[0052] This solves the technical problem in the prior art that, although compensation has been performed twice using the first gateway and the second gateway, if the residual frequency deviation is too large, in the case of 5G using narrowband subcarriers, it is easy for the second gateway to find it difficult to calculate the accurate residual frequency deviation through the pilot signal, thereby failing to achieve accurate frequency deviation compensation.

[0053] Optionally, the operation of the first gateway calculating the first frequency offset corresponding to the first communication signal to be sent includes: the first gateway acquiring ephemeris of the satellite, and calculating the first frequency offset corresponding to the first communication signal based on the ephemeris of the satellite.

[0054] Specifically, the specific operation of the first gateway 110 calculating the first frequency offset corresponding to the first communication signal based on the ephemeris of the satellite 120 includes: first, the first gateway 110 calculates the fourth frequency offset according to the ephemeris information of the satellite 120, the position information of the first gateway 110, and the carrier frequency between the first gateway 110 and the satellite 120. The fourth frequency offset may be, for example, the first downlink feeder link Doppler sampling frequency offset. Then, the first gateway 110 calculates the fifth frequency offset according to the ephemeris information of the satellite 120, the reference point position information, and the carrier frequency between the second gateway 130 and the satellite 120. The fifth frequency offset may be, for example, the second downlink feeder link Doppler sampling frequency offset. And wherein, the operation of determining the second downlink feeder link Doppler sampling frequency offset includes: selecting the center position of the satellite's beam coverage as a reference point, the reference point being uniquely determined by the satellite position and the satellite beam pointing. When the second gateway 130 is located at the reference point, the second downlink feeder link Doppler sampling frequency offset is calculated. Finally, the first gateway 110 determines a first frequency offset based on the fourth frequency offset and the fifth frequency offset, wherein the first frequency offset is the sum of the fourth frequency offset and the fifth frequency offset.

[0055] Optionally, the operation of the second gateway calculating a third frequency offset corresponding to the second communication signal based on the second communication signal includes: the second gateway calculating the third frequency offset based on a pilot signal in the second communication signal.

[0056] Optionally, the first gateway is further provided with a PID control module, wherein the operation of the first gateway performing frequency offset compensation on the first communication signal based on the second frequency offset received from the second gateway in the previous cycle and the first frequency offset, and generating the second communication signal, includes: the first gateway determines frequency offset compensation information based on the PID control module and the second frequency offset; and the PID control module performs frequency offset compensation on the first communication signal according to the frequency offset compensation information and the first frequency offset, thereby generating the second communication signal. Further optionally, the PID control module includes: a proportional unit, an integral unit, and a differential unit, wherein the operation of the first gateway determining the frequency offset compensation information based on the PID control module and the second frequency offset includes: the proportional unit determines proportional compensation information based on the second frequency offset and the preset first weight information; the integral unit determines integral compensation information based on the second frequency offset and the preset second weight information; the differential unit determines differential step information based on the second frequency offset and the preset third weight information; and the PID control module determines frequency offset compensation information based on the proportional compensation information, the integral compensation information, and the differential compensation information.

[0057] Specifically, Figure 4 is a schematic diagram of the structure of the PID control module according to an embodiment of the present application. Figure 4As shown, a PID control module is provided in the first gateway 110. The PID control module includes a proportional unit, an integral unit and a differential unit. The proportional unit is used to determine proportional compensation information based on the second frequency deviation. The integral unit is used to determine integral compensation information based on the second frequency deviation. The differential unit is used to determine differential compensation information based on the second frequency deviation.

[0058] Thus, first, the first gateway 110 sends the received second frequency deviation to the PID control module. Then, the PID control module sends the second frequency deviation to the proportional unit, the integral unit, and the differential unit respectively. First, the proportional unit determines a proportional compensation item based on the second frequency deviation. Then, the first gateway 110 determines a proportional compensation item based on the proportional compensation item and the first weight information corresponding to the proportional compensation item (i.e., Figure 4 K p ), determine the proportional compensation information.

[0059] The integration unit determines an integral compensation item based on the second frequency offset. Then the first gateway 110 determines an integral compensation item based on the integral compensation item and the second weight information corresponding to the integral compensation item (ie, Figure 4 K i ), determine the points compensation information.

[0060] The differential unit determines the differential compensation item based on the second frequency offset. Then the first gateway 110 determines the differential compensation item based on the differential compensation item and the third weight information corresponding to the differential compensation item (ie, Figure 4 K L ), determine the differential compensation information.

[0061] Then, the first gateway 110 determines frequency offset compensation information based on the proportional compensation information, the integral compensation information and the differential compensation information, wherein the frequency offset compensation information may be, for example, the sum of the proportional compensation information, the integral compensation information and the differential compensation information.

[0062] Further, the first gateway 110 performs frequency offset compensation on the first communication signal using the determined frequency offset compensation information and the first frequency offset, thereby generating a second communication signal.

[0063] Therefore, it can be known from the above that in the technical solution disclosed in the present application, the first gateway 110 determines the frequency offset compensation information corresponding to the current period based on the second frequency offset corresponding to the second gateway in the previous period. It is worth noting that the second frequency offset can be, for example, a private frequency offset compensation determined by the second gateway based on the pilot. Afterwards, the first gateway performs frequency offset compensation on the first communication signal based on the frequency offset compensation information and the first frequency offset. Therefore, the second communication signal generated by the first gateway is more accurate than the prior art in which only the satellite ephemeris is used for frequency offset.

[0064] Therefore, according to the first aspect of this embodiment, the technical effect of being able to achieve accurate frequency offset compensation is achieved.

[0065] Figure 5 This is a flow chart of the overall method for frequency offset compensation for satellites and gateways according to Embodiment 1 of the present application. Figure 5 As shown, including:

[0066] S510: The first gateway 110 obtains the ephemeris of the satellite 120, and calculates a first frequency deviation corresponding to a first communication signal to be sent based on the ephemeris of the satellite 120;

[0067] S520: The first gateway 110 performs frequency offset compensation on the first communication signal based on the second frequency offset received from the second gateway 130 in the previous cycle and the first frequency offset, and generates a second communication signal;

[0068] S521: The proportional unit in the PID control module determines proportional compensation information based on the second frequency deviation and preset first weight information;

[0069] S522: The integration unit in the PID control module determines the integration compensation information based on the second frequency deviation and the preset second weight information;

[0070] S523: The differential unit in the PID control module determines differential compensation information based on the third frequency deviation and preset third weight information;

[0071] S524: The first gateway 110 determines frequency offset compensation information based on the proportional compensation information, the integral compensation information, and the differential compensation information;

[0072] S530: The first gateway 110 sends the second communication signal to the second gateway 130 via the satellite 120;

[0073] S540: The second gateway 130 calculates a third frequency offset corresponding to the second communication signal based on the pilot signal in the second communication signal, and sends the third frequency offset to the first gateway 110 via the satellite 120;

[0074] S550: The second gateway 130 compensates the second communication signal based on the third frequency offset, thereby generating a third communication signal.

[0075] In addition, reference Figure 2A and Figure 2B As shown, according to the second aspect of this embodiment, a storage medium is provided, wherein the storage medium includes a stored program, wherein when the program is run, a processor executes any one of the above methods.

[0076] Therefore, according to this embodiment, the technical effect of being able to realize accurate frequency offset compensation is achieved.

[0077] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0078] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0079] Example 2

[0080] Figure 6 FIG. 6 shows a frequency offset compensation device 600 for a satellite and a gateway according to this embodiment, and the device 600 corresponds to the method according to embodiment 1. Figure 6 As shown, the device 600 includes: a first frequency offset calculation module 610, which is used by the first gateway to calculate the first frequency offset corresponding to the first communication signal to be sent; a second communication signal generation module 620, which is used by the first gateway to compensate the frequency offset of the first communication signal based on the second frequency offset received from the second gateway in the previous cycle and the first frequency offset, and generate a second communication signal; a second communication signal sending module 630, which is used by the first gateway to send the second communication signal to the second gateway via a satellite; a third frequency offset determination module 640, which is used by the second gateway to calculate the third frequency offset corresponding to the second communication signal based on the second communication signal, and send the third frequency offset to the first gateway via a satellite; and a third communication signal generation module 650, which is used by the second gateway to compensate the second communication signal based on the third frequency offset, thereby generating a third communication signal.

[0081] Optionally, the first frequency offset calculation module 610 includes: a first frequency offset calculation submodule, which is used for the first gateway to obtain the ephemeris of the satellite, and calculate the first frequency offset corresponding to the first communication signal based on the ephemeris of the satellite.

[0082] Optionally, the third frequency offset determination module 640 includes: a third frequency offset determination submodule, configured for the second gateway to calculate the third frequency offset based on the pilot signal in the second communication signal.

[0083] Optionally, the first gateway is further provided with a PID control module, wherein the second communication signal generating module 520 comprises: a frequency offset compensation information determining module, used for the first gateway to determine the frequency offset compensation information based on the PID control module and the second frequency offset; and a second communication signal generating module, used for the PID control module to perform frequency offset compensation on the first communication signal according to the frequency offset compensation information and the first frequency offset, thereby generating a second communication signal.

[0084] Optionally, the PID control module includes: a proportional unit, an integral unit and a differential unit, wherein the frequency deviation compensation information determination module includes: a proportional compensation information determination module, which is used for the proportional unit to determine the proportional compensation information based on the second frequency deviation and the preset first weight information; an integral compensation information determination module, which is used for the integral unit to determine the integral compensation information based on the second frequency deviation and the preset second weight information; a differential compensation information determination module, which is used for the differential unit to determine the differential compensation information based on the second frequency deviation and the preset third weight information; and a frequency deviation compensation information determination submodule, which is used for the PID control module to determine the frequency deviation compensation information based on the proportional compensation information, the integral compensation information and the differential compensation information.

[0085] Therefore, according to this embodiment, the technical effect of realizing accurate frequency offset compensation can be achieved.

[0086] Example 3

[0087] Figure 7 FIG. 7 shows a frequency offset compensation device 700 for a satellite and a gateway according to this embodiment, and the device 700 corresponds to the method according to embodiment 1. Figure 7 As shown, the device 700 includes: a processor 710; and a memory 720, connected to the processor 710, and configured to provide the processor 710 with instructions for processing the following processing steps: the first gateway calculates a first frequency offset corresponding to a first communication signal to be sent; the first gateway compensates the first communication signal for frequency offset based on the second frequency offset received from the second gateway in the previous cycle and the first frequency offset, and generates a second communication signal; the first gateway sends the second communication signal to the second gateway via a satellite; the second gateway calculates a third frequency offset corresponding to the second communication signal based on the second communication signal, and sends the third frequency offset to the first gateway via a satellite; and the second gateway compensates the second communication signal based on the third frequency offset, thereby generating a third communication signal.

[0088] Optionally, the operation of the first gateway calculating the first frequency offset corresponding to the first communication signal to be sent includes: the first gateway acquiring ephemeris of the satellite, and calculating the first frequency offset corresponding to the first communication signal based on the ephemeris of the satellite.

[0089] Optionally, the operation of the second gateway calculating a third frequency offset corresponding to the second communication signal based on the second communication signal includes: the second gateway calculating the third frequency offset based on a pilot signal in the second communication signal.

[0090] Optionally, the first gateway is further provided with a PID control module, wherein the first gateway performs frequency offset compensation on the first communication signal based on the second frequency offset received from the second gateway in the previous cycle and the first frequency offset, and generates an operation of the second communication signal, including: the first gateway determines frequency offset compensation information based on the PID control module and the second frequency offset; and the PID control module performs frequency offset compensation on the first communication signal according to the frequency offset compensation information and the first frequency offset, thereby generating the second communication signal.

[0091] Optionally, the PID control module includes: a proportional unit, an integral unit and a differential unit, wherein the operation of the first signal gateway determining the frequency deviation compensation information based on the PID control module and the second frequency deviation includes: the proportional unit determines the proportional compensation information based on the second frequency deviation and the preset first weight information; the integral unit determines the integral compensation information based on the second frequency deviation and the preset second weight information; the differential unit determines the differential compensation information based on the second frequency deviation and the preset third weight information; and the PID control module determines the frequency deviation compensation information based on the proportional compensation information, the integral compensation information and the differential compensation information.

[0092] Therefore, according to this embodiment, the technical effect of realizing accurate frequency offset compensation can be achieved.

[0093] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0094] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0095] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0096] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0097] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0098] If the integrated unit is implemented in the form of 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. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0099] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A frequency offset compensation system for a satellite and a gateway, comprising a first gateway, a satellite and a second gateway, wherein the first gateway is connected to the second gateway via the satellite, characterized in that: The system is also configured to: The first gateway calculates a first frequency offset corresponding to a first communication signal to be sent; The first gateway station performs frequency offset compensation on the first communication signal based on the second frequency offset received from the second gateway station in the previous period and the first frequency offset, and generates a second communication signal; The first gateway sends the second communication signal to the second gateway via the satellite; The second gateway station calculates a third frequency offset corresponding to the second communication signal based on the second communication signal, and sends the third frequency offset to the first gateway station through the satellite; as well as The second gateway compensates the second communication signal based on the third frequency offset, thereby generating a third communication signal.

2. The system according to claim 1, characterized in that The operation of the first gateway calculating a first frequency offset corresponding to a first communication signal to be sent includes: The first gateway obtains the ephemeris of the satellite, and calculates a first frequency offset corresponding to the first communication signal based on the ephemeris of the satellite.

3. The system according to claim 1, characterized in that The operation of calculating, by the second gateway, a third frequency offset corresponding to the second communication signal based on the second communication signal includes: The second gateway calculates the third frequency offset based on a pilot signal in the second communication signal.

4. The system according to claim 1, characterized in that The first gateway is further provided with a PID control module, wherein the first gateway performs frequency offset compensation on the first communication signal based on the second frequency offset received from the second gateway in the previous cycle and the first frequency offset, and generates an operation of a second communication signal, including: The first gateway determines frequency offset compensation information based on the PID control module and the second frequency offset; and The PID control module performs frequency offset compensation on the first communication signal according to the frequency offset compensation information and the first frequency offset, thereby generating the second communication signal.

5. The system according to claim 4, characterized in that The PID control module includes: a proportional unit, an integral unit and a differential unit, wherein the first gateway determines the operation of frequency deviation compensation information based on the PID control module and the second frequency deviation, including: The proportional unit determines proportional compensation information based on the second frequency offset and preset first weight information; The integration unit determines integration compensation information based on the second frequency offset and preset second weight information; The differential unit determines differential compensation information based on the second frequency offset and preset third weight information; and The first gateway determines the frequency offset compensation information based on the proportional compensation information, the integral compensation information, and the differential compensation information.

6. A frequency offset compensation method for a satellite and a gateway, characterized in that: include: The first gateway calculates a first frequency offset corresponding to a first communication signal to be sent; The first gateway station performs frequency offset compensation on the first communication signal based on the second frequency offset received from the second gateway station in the previous period and the first frequency offset, and generates a second communication signal; The first gateway sends the second communication signal to the second gateway via a satellite; The second gateway station calculates a third frequency offset corresponding to the second communication signal based on the second communication signal, and sends the third frequency offset to the first gateway station through the satellite; as well as The second gateway compensates the second communication signal based on the third frequency offset, thereby generating a third communication signal.

7. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the method of claim 6 is executed by a processor.

8. A frequency deviation compensation device for a satellite and a gateway, characterized in that: include: A first frequency offset calculation module, used for the first gateway to calculate a first frequency offset corresponding to a first communication signal to be sent; A second communication signal generating module, configured for the first gateway to perform frequency offset compensation on the first communication signal based on the second frequency offset received from the second gateway in the previous period and the first frequency offset, and to generate a second communication signal; A second communication signal sending module, configured for the first gateway to send the second communication signal to the second gateway via the satellite; A third frequency offset determination module, configured for the second gateway to calculate a third frequency offset corresponding to the second communication signal based on the second communication signal, and to send the third frequency offset to the first gateway via the satellite; as well as The third communication signal generating module is used for the second gateway to compensate the second communication signal based on the third frequency offset, so as to generate a third communication signal.

9. The device according to claim 8, characterized in that The first frequency deviation calculation module includes: The first frequency offset calculation submodule is used for the first gateway to obtain the ephemeris of the satellite, and calculate the first frequency offset corresponding to the first communication signal based on the ephemeris of the satellite.

10. A frequency deviation compensation device for a satellite and a gateway, characterized in that: include: processor; as well as A memory, connected to the processor, configured to provide the processor with instructions for processing the following processing steps: The first gateway calculates a first frequency offset corresponding to a first communication signal to be sent; The first gateway station performs frequency offset compensation on the first communication signal based on the second frequency offset received from the second gateway station in the previous period and the first frequency offset, and generates a second communication signal; The first gateway sends the second communication signal to the second gateway via a satellite; The second gateway station calculates a third frequency offset corresponding to the second communication signal based on the second communication signal, and sends the third frequency offset to the first gateway station through the satellite; as well as The second gateway compensates the second communication signal based on the third frequency offset, thereby generating a third communication signal.

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