Satellite beam-hopping verification device and method based on wireless channel simulator

Abstract

The application discloses a satellite beam hopping verification device and method based on a wireless channel simulator, and comprises the following steps: presetting all beam position information at a base station and a wireless channel simulator; presetting a terminal to be accessed at a wireless channel simulator master control module; starting a satellite-ground beam hopping simulation according to satellite ephemeris information by a simulation system; scanning the beam position by the base station through ephemeris, obtaining beam control information and transmitting the beam control information to the wireless channel simulator; calculating whether the preset terminal beam position is scanned by the current beam according to the ephemeris information and the beam control information, if yes, opening a connection channel between the base station side beam and the terminal by the simulator, and if not, closing the connection channel between the current beam and the preset terminal; and completing the satellite beam hopping verification based on the wireless channel simulator through ephemeris simulation. The application can realize the satellite beam hopping verification strategy quickly without the participation of a phased array antenna.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of satellite communication, in particular to a satellite beam hopping verification device and method based on a wireless channel simulator. BACKGROUND

[0002] Satellite communication is widely used in the fields of communication, navigation, meteorology and surveying due to its advantages of rapid network deployment, no terrain limitation and global coverage. With the development of satellite wireless communication and space-ground integration technology, MIMO communication technology with phased array antenna becomes a standard configuration of satellite payload. Compared with traditional reflector antenna, phased array antenna has great advantages in beam shaping and beam scanning.

[0003] The GNSS simulator in the traditional beam hopping verification scheme can provide the same accurate data as the navigation satellite, which acts on the base station and the wireless channel simulator for synchronization of simulated data. The base station baseband unit generates wave control information to control the RRU to realize beam shaping and beam hopping according to the ephemeris information and all wave position information.

[0004] The design of the phased array antenna in the RRU needs to be considered at the system level, for example, the arrangement of array elements, beam width, sidelobe suppression and multi-user interference, which will affect the performance test of satellite communication. More importantly, the base station baseband manufacturer may not have the RRU (Radio Remote Unit) unit. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a satellite beam hopping verification method based on a wireless channel simulator, comprising the following steps:

[0006] Step one, preset all wave position information at the base station and the wireless channel simulator; preset the wave position where the terminal to be accessed is located at the wireless channel simulator master control module;

[0007] Step two, the simulation system starts the satellite-ground beam hopping simulation according to the satellite ephemeris information synchronized by the GNSS simulator;

[0008] Step three, the base station performs wave position scanning through the ephemeris, obtains wave control information and transmits it to the wireless channel simulator;

[0009] Step four, the wireless channel simulator calculates whether the current beam scans the preset terminal wave position according to the ephemeris information and the wave control information, if yes, the simulator opens the connection channel between the base station side beam and the terminal; if not, the connection channel between the current beam and the preset terminal is closed;

[0010] Step five, judge whether the ephemeris simulation is completed, if not, return to step four, otherwise, complete the satellite beam hopping verification based on the wireless channel simulator.

[0011] Further, the simulation system according to the GNSS simulator opens the satellite-ground beam hopping simulation in synchronization with satellite ephemeris information, including that satellite transceiving demodulation needs both sides to obtain ephemeris information in advance, and communication is carried out according to ephemeris time, and simulation of the wireless channel simulator is carried out according to ephemeris information; time synchronization of the base station and the wireless channel simulator is completed through the GNSS simulator, and the GNSS simulator provides UTC time and 1PPS to determine the synchronization simulation opening time of both sides.

[0012] Further, the wireless channel simulator calculates whether the current beam scans to the preset terminal wave position according to ephemeris information and wave control information, including that the wireless channel simulator calculates the geometric position relationship of both ends of transceiving according to ephemeris information, and calculates the shaping angle information of the satellite side phased array for the current terminal according to the geometric position relationship, and if the wave control information of the base station side is consistent with the shaping angle information of the phased array for the current terminal, the current beam scans to the preset terminal wave position.

[0013] Further, the judgment of whether the ephemeris simulation is ended includes that the ephemeris simulation is ended when the wireless channel simulator runs ephemeris to the shielding moment, and the ground terminal cannot access the satellite.

[0014] A satellite beam hopping verification device based on a wireless channel simulator, which applies the satellite beam hopping verification method based on the wireless channel simulator, and includes a GNSS simulator, a wireless channel simulator and a base station module; the GNSS simulator, the base station module and the wireless channel simulator are sequentially connected.

[0015] The beneficial effects of the application are that the satellite base station beam hopping strategy can be quickly verified without the participation of the phased array antenna through the technical scheme provided by the application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a flowchart of the satellite beam hopping verification method based on the wireless channel simulator;

[0017] Figure 2 It is a schematic diagram of the principle of the satellite beam hopping verification device based on the wireless channel simulator;

[0018] Figure 3 It is a wave position schematic diagram;

[0019] Figure 4 It is a schematic diagram of terminal preset wave position information in a simulation scene;

[0020] Figure 5 It is a schematic diagram of terminal access of wave position 1 when the base station scans;

[0021] Figure 6Wave position 11 terminal access schematic diagram when scanning for base station;

[0022] Figure 7 No terminal access schematic diagram when scanning for base station. DETAILED DESCRIPTION

[0023] The technical solutions of the present application will be described in further detail below with reference to the accompanying drawings, but the scope of protection of the present application is not limited to the following description.

[0024] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application, that is, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0025] Therefore, the detailed description of the embodiments of the present application provided in the accompanying drawings below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. It should be noted that the relationship terms such as "first" and "second" and the like are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations.

[0026] Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or further includes elements inherent to such a process, method, article or apparatus. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or apparatus including the element.

[0027] The features and performances of the present application will be further described in detail below in combination with the embodiments.

[0028] As Figure 1 shown, a satellite hop beam verification method based on a wireless channel simulator includes the following steps:

[0029] Step one, preset all wave position information at the base station and the wireless channel simulator; preset the wave position where the terminal to be accessed at the wireless channel simulator master control module;

[0030] Step two, the simulation system opens the satellite-to-ground beam hopping simulation according to the satellite ephemeris information in synchronization with the GNSS simulator;

[0031] Step three, the base station scans the wave position through the ephemeris to obtain the wave control information and transmit it to the wireless channel simulator;

[0032] Step four, the wireless channel simulator calculates whether the preset terminal wave position is scanned by the current beam according to the ephemeris information and the wave control information, if yes, the simulator opens the connection channel between the base station side beam and the terminal; if not, the connection channel between the current beam and the preset terminal is closed;

[0033] Step five, judge whether the ephemeris simulation is completed, if not, return to step four, otherwise, complete the satellite beam hopping verification based on the wireless channel simulator.

[0034] The simulation system opens the satellite-to-ground beam hopping simulation according to the satellite ephemeris information in synchronization with the GNSS simulator means that the satellite transceiver demodulation needs to know the ephemeris information in advance, and strictly communicates according to the ephemeris time. The simulation of the wireless channel simulator is also carried out according to the ephemeris information. Therefore, the strict time synchronization of the base station and the wireless channel simulator needs to be completed through the GNSS simulator. The specific method is that the GNSS simulator provides UTC (Universal Time Coodinated) time and 1PPS to determine the synchronization simulation opening time of both parties.

[0035] The wireless channel simulator calculates whether the preset terminal wave position is scanned by the current beam according to the ephemeris information and the wave control information means that the wireless channel simulator can calculate the geometric position relationship between the two ends of the transceiver according to the ephemeris information. The geometric position relationship can be used to calculate the beamforming angle information of the satellite side phased array for the current terminal. If the wave control information of the base station side and the beamforming angle information of the phased array for the current terminal are consistent, it means that the current beam is scanned to the preset terminal wave position.

[0036] The judgment whether the ephemeris simulation is completed means that the wireless channel simulator runs the ephemeris to the occlusion time (the earth blocks the communication between the satellite and the ground terminal), at this time the wireless channel simulator greatly increases the transmission attenuation (-300dB), and the ground terminal cannot access the satellite.

[0037] A satellite beam hopping verification device based on a wireless channel simulator, which applies the satellite beam hopping verification method based on the wireless channel simulator, comprising a GNSS simulator, a wireless channel simulator, and a base station module.

[0038] The GNSS simulator, the base station module, and the wireless channel simulator are connected in sequence.

[0039] Specifically, the difference between the wave hopping speed verification scheme of the application and the traditional scheme is that there is no RRU unit. The GNSS simulator provides the same accurate data as the navigation satellite, which acts on the base station and the wireless channel simulator at the same time. The time of the data is strictly synchronized to prevent mismatch of frame control information and symbol information. The baseband unit of the base station converts the logical beam signal of the baseband into an analog signal through an external DA conversion board and directly inputs the analog signal to the simulator. At the same time, the base station inputs the wave control information of the base station to the simulator through the optical fiber interface. The simulator combines the current ephemeris information to determine whether the current beam is output to the designated terminal. The base station side realizes the beam hopping strategy test by transforming the wave control information and the beam. The specific steps are as follows:

[0040] 1) The base station and the wireless channel simulator prestore all beam position information, as shown in the schematic diagram Figure 3 .

[0041] 2) The channel simulator main control software prestores the beam position where the terminal needs to access, assuming that the terminals are pre-stored in beam position 1 and beam position 11, as shown in the schematic diagram Figure 4 .

[0042] 3) The simulation system starts the satellite-earth beam hopping simulation according to the satellite ephemeris information of the GNSS simulator;

[0043] 4) The base station scans the beam position through the ephemeris and transmits the wave control information to the wireless channel simulator in real time;

[0044] 5) The wireless channel simulator calculates whether the current beam can scan the pre-stored terminal beam position according to the ephemeris information and the wave control information. If yes, the simulator opens the base station side beam and the terminal connection channel; if not, the simulator closes the current beam and the pre-stored terminal connection channel, as shown in the schematic diagrams Figure 5 , Figure 6 and Figure 7 .

[0045] The above description is only the preferred embodiment of the application, and it should be understood that the application is not limited to the form disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein by the above-mentioned teaching or related art or knowledge. The modification and change made by the person skilled in the art without departing from the spirit and scope of the application shall be within the protection scope of the appended claims of the application.

Claims

1. A method for verifying satellite beam hopping based on a wireless channel emulator, characterized in that, It comprises the following steps: Step one, preset all wave position information at the base station and the wireless channel simulator; preset the wave position where the terminal needs to access at the wireless channel simulator master control module; Step two, the simulation system opens the satellite-to-ground beam hopping simulation according to the satellite ephemeris information in synchronization according to the GNSS simulator; Step three, the base station scans the wave position through the ephemeris, obtains the wave control information and transmits it to the wireless channel simulator; Step four, the wireless channel simulator calculates whether the preset terminal wave position is scanned by the current beam according to the ephemeris information and the wave control information, if yes, the simulator opens the connection channel of the base station side beam and the terminal; if not, the connection channel of the current beam and the preset terminal is closed; Step five, judge whether the ephemeris simulation is completed, if not, return to step four, otherwise, complete the satellite beam hopping verification based on the wireless channel simulator; The wireless channel simulator calculates whether the preset terminal wave position is scanned by the current beam according to the ephemeris information and the wave control information: the wireless channel simulator calculates the geometric position relationship of the transceiver according to the ephemeris information, calculates the shaping angle information of the satellite side phased array for the current terminal according to the geometric position relationship, if the wave control information of the base station side and the shaping angle information of the phased array for the current terminal are consistent, the current beam scans the preset terminal wave position; The simulation system opens the satellite-to-ground beam hopping simulation in synchronization according to the satellite ephemeris information according to the GNSS simulator: the satellite transceiver demodulation needs to obtain the ephemeris information in advance, and communicates according to the ephemeris time, and the simulation of the wireless channel simulator is performed according to the ephemeris information; The time synchronization of the base station and the wireless channel simulator is completed through the GNSS simulator, which provides UTC time and 1PPS to determine the synchronization simulation opening time of both parties.

2. The method of claim 1, wherein, The judgment whether the ephemeris simulation is completed comprises: when the ephemeris runs to the blocking time, the ground terminal cannot access the satellite, and then the ephemeris simulation is completed.

3. A satellite beam-hopping verification apparatus based on a wireless channel emulator, characterized in that, The satellite beam hopping verification method based on the wireless channel simulator according to any one of claims 1-2 comprises a GNSS simulator, a wireless channel simulator, and a base station module; The GNSS simulator, the base station module and the wireless channel simulator are connected in sequence.

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