Signal processing method and apparatus, communication device, and readable storage medium

Abstract

The application discloses a signal processing method and device, communication equipment and a readable storage medium, and belongs to the technical field of wireless communication. The signal processing method in the application embodiment comprises the following steps: a base station obtains a plurality of first carriers carrying useful data in a plurality of carriers; the plurality of carriers comprise carriers in each cell in a plurality of cells covered by a satellite; each first carrier is frequency-converted to a frequency point corresponding to each first carrier respectively to obtain continuous carriers; and the continuous carriers are transmitted to the satellite through a gateway. Therefore, frequency conversion resources can be configured only for carriers carrying useful data, resource overhead is saved, and resource waste is avoided.

Description

Technical Field

[0001] This application belongs to the field of wireless communication technology, specifically relating to a signal processing method, apparatus, communication device, and readable storage medium. Background Technology

[0002] In satellite communications, due to the large area to be covered on the ground, satellites typically employ a multi-cell, multi-carrier approach. This involves dividing the ground coverage beam into multiple cells, each covering a different region. Furthermore, to increase cell capacity, each cell is further subdivided into multiple carriers. However, different cells have different capacities, and not all cells will have all their subdivided carriers fully utilized. In other words, although the baseband signal transmitted to the remote radio unit covers all carriers, some carrier signals may be dataless, yet resources still need to be reserved for processing these dataless signals. This results in wasted resources. Summary of the Invention

[0003] The purpose of this application is to provide a signal processing method, apparatus, communication device, and readable storage medium to solve the problem of resource waste caused by existing signal processing methods.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] Firstly, a signal processing method is provided, including:

[0006] The base station acquires multiple first carriers carrying useful data from multiple carriers; wherein, the multiple carriers include carriers within each of multiple cells covered by satellite;

[0007] The base station converts each of the first carriers to the frequency point corresponding to each of the first carriers to obtain continuous carriers;

[0008] The base station transmits the continuous carrier to the satellite via a gateway station.

[0009] Secondly, a signal processing apparatus is provided, comprising:

[0010] A radio frequency remote unit is used to obtain multiple first carriers carrying useful data from multiple carriers, the multiple carriers including carriers in each of multiple cells covered by the satellite; to convert each first carrier to a frequency point corresponding to each first carrier to obtain a continuous carrier; and to transmit the continuous carrier to the satellite through a gateway station.

[0011] Thirdly, a communication device is provided, including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0012] Fourthly, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0013] Fifthly, a computer program product is provided, including computer instructions that, when executed by a processor, implement the steps of the method described in the first aspect.

[0014] The solution in this application embodiment can obtain multiple first carriers carrying useful data from multiple carriers, including carriers within each of multiple cells covered by a satellite. Each first carrier is frequency-converted to its corresponding frequency point to obtain continuous carriers, which are then transmitted to the satellite via a gateway station. Therefore, carriers not carrying useful data can be eliminated without missing useful signals, allowing frequency conversion resources to be allocated only to carriers carrying useful data. This combines discrete carriers into continuous carriers with small bandwidth, saving resource overhead and avoiding resource waste. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the network architecture for satellite communication in an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of the signal processing flow in related technologies;

[0017] Figure 3 This is a flowchart of a signal processing method provided in an embodiment of this application;

[0018] Figure 4 This is one of the schematic diagrams of the signal processing flow in the embodiments of this application;

[0019] Figure 5 This is a second schematic diagram of the signal processing flow in the embodiments of this application;

[0020] Figure 6 This is the third schematic diagram of the signal processing flow in the embodiments of this application;

[0021] Figure 7 This is a schematic diagram of the structure of a signal processing device provided in an embodiment of this application;

[0022] Figure 8 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0025] To facilitate understanding of the embodiments of this application, the following will be described first.

[0026] In this embodiment of the application, satellite communication services, such as direct satellite communication services between terminals, are used. Figure 1 As shown, the system mainly comprises three segments: space, ground, and application. The space segment primarily includes feeder antennas to provide satellite coverage and communication on the ground. The ground segment includes gateway stations, satellite base stations, and the core network. Satellite base stations mainly consist of a baseband unit (BBU) and a remote radio unit (RRU). The BBU handles baseband signal processing, while the RRU processes the baseband signal to analog intermediate frequency (IF). The gateway station converts the analog IF signal into a microwave signal and uses a servo system to accurately align the microwave signal to the satellite and transmit it. The application segment includes mobile terminals, IoT terminals, etc., enabling voice, data, and IoT services.

[0027] In satellite communication services, the downlink from the base station to the terminal involves the base station transmitting information / signals to the satellite via a gateway station, which then relays them to the terminal. The uplink from the terminal to the base station involves the terminal transmitting information / signals to the satellite, which then relays them to the ground gateway station, and finally transmits them to the base station for signal processing.

[0028] In satellite communication services, due to the large area to be covered on the ground, satellites typically employ a multi-cell, multi-carrier approach. This involves dividing the ground coverage beam into multiple cells, each covering a different region. Furthermore, to increase cell capacity, the same cell may be further subdivided into multiple carriers. For example... Figure 2 As shown, the satellite coverage area can include k (k>1) cells, each of which is further subdivided into m (m≥1) carriers. During Common Public Radio Interface (CPRI) data packet transmission, the k*m carriers are arranged sequentially in series, i.e., the carriers are arranged as C... 1-1 C 1-2 …C 1-m C 2-1 C 2-2 …C 2-m ...C k-1 C k-2 …C k-m After transmission to the RRU, the RRU performs serial-to-parallel conversion and then configures different frequency points for different carriers through frequency conversion, so as to splice these carriers into a wideband carrier with a bandwidth of k*m. Then, the RRU sends the wideband carrier to the gateway station, which upconverts the wideband carrier to the microwave band and sends it to the satellite. In order to meet the requirements of full ground coverage, each cell will have at least one carrier, but the capacity of different cells is different. Not all cells will use all m carriers. Depending on the traffic volume, a cell can be configured with 1 to m carriers. That is to say, the signal transmitted from the baseband to the RRU is of all carriers, but some carrier signals may not have information. However, the RRU still needs to reserve multiplier resources for a segment of empty carriers and upconvert them to the corresponding frequency points. Finally, it splices them into a wideband signal, which is then upconverted by the gateway station (i.e., upconverted to the local oscillator frequency of the microwave feed signal) and transmitted.

[0029] The above signal processing procedure has two main problems: First, the RRU needs to allocate multiplier resources to all carriers, which leads to resource waste; second, the gateway station does not perform linearization processing on the transmitted signal, which will result in a larger bandwidth of the transmitted signal and a more obvious nonlinearity of the power amplifier, thus leading to more severe degradation of the radio frequency performance. These two problems are also the issues that the proposed solution aims to address.

[0030] The signal processing method, apparatus, communication device, and readable storage medium provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0031] Please see Figure 3 , Figure 3 This is a flowchart of a signal processing method provided in an embodiment of this application. This method is applied to a base station, such as... Figure 3 As shown, the method includes the following steps:

[0032] Step 31: The base station obtains multiple first carriers carrying useful data from multiple carriers; the multiple carriers include carriers within each of multiple cells covered by the satellite;

[0033] Step 32: The base station converts each first carrier frequency to the frequency point corresponding to each first carrier to obtain continuous carriers;

[0034] Step 33: The base station transmits the continuous carrier to the satellite through the gateway station.

[0035] In this embodiment of the application, the base station includes at least a BBU and an RRU, and steps 31 to 33 are performed by the BBU and RRU in the base station.

[0036] In some embodiments, the above-mentioned multiple cells are k cells, where k is an integer greater than 1; each cell can be configured with 1 to m carriers, where m is an integer greater than 1.

[0037] In some embodiments, when converting each first carrier to the corresponding frequency point, the frequency conversion can be implemented based on the multiplier resources configured for each first carrier. When transmitting the continuous carriers to the satellite through the gateway station, the continuous carriers can first be converted into microwave signals in the gateway station, and then the microwave signals can be accurately aligned with the satellite and transmitted through a servo system.

[0038] Optionally, the bandwidth of the aforementioned consecutive carriers can be equal to the number of the first carriers multiplied by the bandwidth of a single carrier.

[0039] The solution in this application embodiment can obtain multiple first carriers carrying useful data from multiple carriers, including carriers within each of multiple cells covered by a satellite. Each first carrier is frequency-converted to its corresponding frequency point to obtain continuous carriers, which are then transmitted to the satellite via a gateway station. This allows carriers without carrying useful data to be removed without missing useful signals, thus allocating frequency conversion resources only to carriers carrying useful data. This merges discrete carriers into continuous carriers with small bandwidth, saving resource overhead and avoiding resource waste. Furthermore, by merging them into continuous carriers with small bandwidth, the power amplifier at the gateway station can operate within a small bandwidth, thereby improving the linearity of the power amplifier at the gateway station.

[0040] In the embodiments of this application, different methods can be used to obtain the carrier wave carrying useful data.

[0041] Optionally, carriers carrying useful data can be obtained through RRU self-detection, and frequency conversion resources, such as multiplier resources, are not configured for carriers without service. The multiple first carriers carrying useful data obtained from the aforementioned multiple carriers can include:

[0042] After completing carrier processing, the base station's BBU transmits the multiple carriers to the base station's RRU; for example, the multiple carriers can be transmitted serially to the RRU via a CPRI link.

[0043] The base station's RRU detects the multiple carriers to obtain the multiple first carriers; specifically, this detection involves detecting whether the carriers carry useful data and selecting multiple first carriers carrying useful data from the multiple carriers.

[0044] By using RRU self-detection, carriers that do not carry useful data can be filtered out without missing useful signals, thereby obtaining carriers that carry useful data and merging discrete carriers into continuous carriers with small bandwidth.

[0045] Considering the amplitude difference between carriers carrying useful data and those not carrying it, a level detection device can be used to detect carriers carrying useful data. This involves passing each carrier through a level detection device, such as a trigger, to determine if a level flip occurs within a certain period. If a flip occurs, the carrier is considered to have data; otherwise, it is considered to have no data. For carriers carrying useful data, frequency conversion resources are configured sequentially; for carriers without data, no frequency conversion resources are configured.

[0046] Optionally, the RRU of the base station may detect the plurality of carriers by using a level detection device to detect whether each of the plurality of carriers has a level inversion within a detection time, and identify the carrier with a level inversion within the detection time as the first carrier. If a carrier does not have a level inversion within its detection time, it is determined that the carrier does not carry useful data. In this way, the carrier carrying useful data can be detected easily and quickly using the level detection device.

[0047] For example, assuming the satellite coverage area includes k cells, and each cell is further subdivided into m carriers, the corresponding signal processing procedure can be as follows: Figure 4 As shown: After completing signal processing for all carriers, the BBU sequentially arranges the k*m carriers in series, i.e., the carriers are arranged as C. 1-1 C 1-2 …C 1-m C 2-1 C 2-2 …C 2-m ...C k-1 C k-2 …C k-mThe data is transmitted to the RRU via the CPRI link. Upon receiving k*m serial carriers, the RRU first performs serial-to-parallel conversion, transforming the serial carriers into a parallel data stream. Then, the data stream is input to the level detection device. Assuming the CPRI data packet reserves time t for each carrier, the detection period of the level detection device is also set to t. The device checks for level inversions within each period t. If an inversion occurs, multiplier resources are allocated to the corresponding carrier; otherwise, no multiplier resources are allocated. After detection by the level detection device, the carriers with traffic (i.e., carriers carrying useful data) become: Cell 1 (C... 1-1 To C 1-m1’ ), Community 2 (C) 2-1 To C 2-m2’ ... (k(C)) k-1 To C k-mk’ Each cell has a carrier count greater than or equal to 1 and less than or equal to m. Taking cell 1 as an example, cell 1 has m1' carriers, where m1' is 1, and 1 ≤ m1' ≤ m. After determining the carriers with service activity, the RRU sequentially configures multiplier resources for these carriers and sets the carrier C... 1-1 Frequency multiplication to frequency point f 1-1 ..., carrier C 1-m1’ Frequency multiplication to frequency point f 1-m1’ This process is repeated until all carriers carrying useful data have been frequency-doubled to their respective frequencies, generating a broadband signal which is then sent to the gateway station. The gateway station then converts the signal to the local oscillator frequency of the microwave feed signal. The bandwidth of this broadband signal is the number of useful signal carriers multiplied by the bandwidth of a single carrier. Because carriers without data are eliminated, the bandwidth of the generated broadband signal is less than the original signal bandwidth k*m*single carrier bandwidth, meaning it is merged into a continuous carrier with a small bandwidth. This saves multiplier resources and improves the linearity of the gateway station's power amplifier.

[0048] Since the BBU at the base station completes signal processing for all carriers, it will know whether a carrier carries useful data, i.e., whether the carrier is a useful signal. Therefore, the BBU can determine the carriers carrying useful data, and carriers without useful data are not placed on the transmission link from the BBU to the RRU, thus merging discrete carriers into continuous carriers with small bandwidth. Optionally, the multiple first carriers carrying useful data obtained from the above-mentioned multiple carriers may include:

[0049] After completing carrier processing, the base station's BBU determines multiple first carriers carrying useful data among the multiple carriers;

[0050] The base station's BBU transmits the plurality of first carriers to the base station's RRU. For example, the plurality of first carriers can be transmitted serially to the RRU via a CPRI link;

[0051] This allows the carrier processing of the BBU to determine the carrier carrying useful data, eliminating the need for additional detection devices / equipment to detect the carrier, thus reducing complexity.

[0052] Optionally, the above-mentioned transmission of the plurality of first carriers to the RRU of the base station includes: the BBU of the base station sequentially moving the plurality of first carriers into the transmission link, and serially transmitting the plurality of first carriers to the RRU of the base station through the transmission link. For example, the transmission link is a CPRI link, etc.

[0053] For example, assuming the satellite coverage area includes k cells, and each cell is further subdivided into m carriers, the corresponding signal processing procedure can be as follows: Figure 5 As shown: After completing signal processing for all carriers, the BBU will determine whether different carriers carry useful data, and will then determine the carriers carrying the useful data. For example, the carrier carrying the useful data might be: Cell 1 (C 1-1 To C 1-m1’ ), Community 2 (C) 2-1 To C 2-m2’ ... (k(C)) k-1 To C k-mk’ Then, carriers carrying useful data are sequentially placed on the CPRI link, while carriers without useful data are not placed on the CPRI link. That is, carriers carrying useful data are moved to the CPRI link and serially transmitted to the RRU through the CPRI link. After receiving the serial carriers carrying useful data, the RRU first performs serial-to-parallel conversion, then configures multiplier resources for these carriers, and multiplies these carriers to different frequency points through frequency conversion. These carriers are then spliced ​​into a wideband carrier, with the corresponding bandwidth equal to the number of useful carriers multiplied by the carrier bandwidth. After that, the RRU sends the wideband carrier to the gateway station, where upconversion (such as frequency conversion to the local oscillator frequency of the microwave feed signal), signal amplification, and signal transmission are completed.

[0054] Since the BBU at the base station will know whether a carrier carries useful data (i.e., whether a carrier is a useful signal) after completing signal processing for all carriers, the BBU can inform the RRU which carriers carry useful data while transmitting all carriers to the RRU. The RRU can then determine which carriers carry useful data and allocate frequency conversion resources only for those carriers. Optionally, the multiple first carriers carrying useful data obtained from the aforementioned multiple carriers include:

[0055] After completing carrier processing, the base station's BBU transmits the multiple carriers and first information to the base station's RRU; wherein, the first information is used to indicate multiple first carriers carrying useful data among the multiple carriers;

[0056] Based on the first information, the RRU of the base station determines a plurality of first carriers carrying useful data from the plurality of carriers.

[0057] With the help of the BBU's instructions, the RRU can easily identify the carrier carrying useful data.

[0058] Optionally, the first information is a list containing the carrier numbers of each first carrier, so that the RRU determines the carrier carrying useful data based on the carrier numbers in the list.

[0059] For example, assuming the satellite coverage area includes k cells, and each cell is further subdivided into m carriers, the corresponding signal processing procedure can be as follows: Figure 6 As shown: After completing signal processing for all carriers, the BBU sequentially arranges the k*m carriers in series, i.e., the carriers are arranged as C. 1-1 C 1-2 …C 1-m C 2-1 C 2-2 …C 2-m ...C k-1 C k-2 …C k-m This information is transmitted to the RRU via the CPRI link. Simultaneously, the BBU generates a list of useful signal carrier numbers and also transmits this list to the RRU via the CPRI link. This list contains identifiers, such as carrier numbers, of the carriers carrying useful data. For example, if the carrier carrying useful data is: Cell 1 (C... 1-1 To C 1-m1’ ), Community 2 (C) 2-1 To C 2-m2’ ... (k(C)) k-1 To C k-mk’ If the list contains the carrier numbers of these carriers, then the RRU first performs serial-to-parallel conversion after receiving the serial k*m carriers and the list, extracts the list, and obtains the carriers carrying useful data based on the carrier numbers contained in the list. Then, it configures multiplier resources for these carriers and multiplies them to different frequency points through frequency conversion. These carriers are then spliced ​​together to form a wideband carrier, with the corresponding bandwidth equal to the number of useful carriers multiplied by the carrier bandwidth. After that, the RRU sends the wideband carrier to the gateway station, where upconversion (such as frequency conversion to the local oscillator frequency of the microwave feed signal), signal amplification, and signal transmission are completed.

[0060] It should be noted that the signal processing method provided in this application embodiment can be executed by a signal processing device or a control module within that signal processing device for executing the signal processing method. This application embodiment uses the execution of the signal processing method by a signal processing device as an example to illustrate the signal processing device provided in this application embodiment.

[0061] Please see Figure 7 , Figure 7 This is a schematic diagram of a signal processing device provided in an embodiment of this application. This device is applied to a base station, such as... Figure 7 As shown, the signal processing device 70 includes a radio frequency remote unit 71, wherein:

[0062] The radio frequency remote unit 71 is used to: obtain multiple first carriers carrying useful data from multiple carriers; wherein the multiple carriers include carriers in each of multiple cells covered by the satellite; convert each first carrier to a frequency point corresponding to each first carrier to obtain a continuous carrier; and transmit the continuous carrier to the satellite through a gateway station.

[0063] Optionally, the signal processing device 70 includes a baseband processing unit 72; the baseband processing unit 72 is used to: after completing carrier processing, transmit the plurality of carriers to the radio frequency remote unit 71 of the base station;

[0064] The radio frequency remote unit 71 is specifically used to: detect the plurality of carriers respectively to obtain the plurality of first carriers.

[0065] Optionally, the radio frequency remote unit 71 is specifically used to: use a level detection device to detect whether each of the plurality of carriers has a level flip within the detection time, and determine the carrier among the plurality of carriers that has a level flip within the detection time as the first carrier.

[0066] Optionally, the signal processing device 70 further includes a baseband processing unit 72; the baseband processing unit 72 is used to: after completing carrier processing, determine a plurality of first carriers carrying useful data among the plurality of carriers, and transmit the plurality of first carriers to the radio frequency remote unit 71.

[0067] Optionally, the baseband processing unit 72 is specifically used to: sequentially transfer the plurality of first carriers to the transmission link, and serially transmit the plurality of first carriers to the radio frequency remote unit 71 through the transmission link.

[0068] Optionally, the signal processing device 70 further includes a baseband processing unit 72; the baseband processing unit 72 is configured to: after completing carrier processing, transmit the plurality of carriers and first information to the radio frequency remote unit 71; the first information is used to indicate the plurality of first carriers carrying useful data among the plurality of carriers;

[0069] The radio frequency remote unit 71 is specifically used to: determine the plurality of first carriers from the plurality of carriers based on the first information.

[0070] Optionally, the first information is a list containing the carrier numbers of each of the first carriers.

[0071] Optionally, the bandwidth of the consecutive carriers is equal to the number of the first carriers multiplied by the bandwidth of a single carrier.

[0072] The signal processing apparatus 70 of this application embodiment can achieve the above-described... Figure 3 The various processes of the method embodiments shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0073] Optional, such as Figure 8 As shown, this application embodiment also provides a communication device 80, including a processor 81, a memory 82, and a program or instructions stored in the memory 82 and executable on the processor 81. When the program or instructions are executed by the processor 81, they implement the various processes of the above-described signal processing method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0074] This application also provides a computer program product, including computer instructions. When the computer instructions are executed by a processor, they can implement the various processes of the above-described signal processing method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0075] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they can implement the various processes of the above-described signal processing method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0076] Computer-readable media include both permanent and non-permanent, removable and non-removable media, which can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0077] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0078] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0079] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of 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 this application, 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 service classification device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0080] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A signal processing method, characterized in that, include: The base station acquires multiple first carriers carrying useful data from multiple carriers; wherein, the multiple carriers include carriers within each of multiple cells covered by satellite; The base station converts each of the first carriers to the frequency point corresponding to each of the first carriers to obtain continuous carriers; The base station transmits the continuous carrier to the satellite via a gateway station.

2. The method according to claim 1, characterized in that, The base station obtains multiple first carriers carrying useful data from multiple carriers, including: After completing carrier processing, the baseband processing unit (BBU) of the base station transmits the multiple carriers to the remote radio unit (RRU) of the base station. The RRU of the base station detects the plurality of carriers respectively to obtain the plurality of first carriers.

3. The method according to claim 2, characterized in that, The RRU of the base station detects the plurality of carriers respectively to obtain the plurality of first carriers, including: The RRU of the base station uses a level detection device to detect whether each of the plurality of carriers has a level flip within the detection time, and determines the carrier with a level flip within the detection time as the first carrier.

4. The method according to claim 1, characterized in that, The base station obtains multiple first carriers carrying useful data from multiple carriers, including: After completing carrier processing, the base station's BBU determines multiple first carriers carrying useful data among the multiple carriers. The base station's BBU transmits the plurality of first carriers to the base station's RRU.

5. The method according to claim 4, characterized in that, The base station's BBU transmits the plurality of first carriers to the base station's RRU, including: The base station's BBU sequentially moves the plurality of first carriers into the transmission link, and transmits the plurality of first carriers serially to the base station's RRU through the transmission link.

6. The method according to claim 1, characterized in that, The base station obtains multiple first carriers carrying useful data from multiple carriers, including: After completing carrier processing, the BBU of the base station transmits the plurality of carriers and the first information to the RRU of the base station; wherein, the first information is used to indicate the plurality of first carriers carrying useful data among the plurality of carriers; The RRU of the base station determines the plurality of first carriers from the plurality of carriers based on the first information.

7. The method according to claim 6, characterized in that, The first information is a list containing the carrier numbers of each of the first carriers.

8. The method according to any one of claims 1 to 7, characterized in that, The bandwidth of the consecutive carriers is equal to the number of the first carriers multiplied by the bandwidth of a single carrier.

9. A signal processing apparatus, characterized in that, include: A radio frequency remote unit is used to acquire multiple first carriers carrying useful data from multiple carriers, said multiple carriers including carriers within each of multiple cells covered by a satellite; Each of the first carriers is frequency-converted to the frequency point corresponding to each of the first carriers to obtain a continuous carrier; the continuous carrier is then transmitted to the satellite through a gateway station.

10. A communication device, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method as described in any one of claims 1 to 8.

11. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the method as described in any one of claims 1 to 8.

12. A computer program product, characterized in that, Includes computer instructions that, when executed by a processor, implement the steps of the method as described in any one of claims 1 to 8.

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