Reception device, reception method, data processing device, and data processing method

Abstract

The present technology relates to a reception device, a reception method, a data processing device, and a data processing method which enable a reception terminal for receiving a signal from a reception target terminal to efficiently receive the signal. The reception device comprises: an interference power calculation unit that calculates interference power to a desired reception wave; an SINR calculation unit that acquires position information of a reception target terminal and an interference map representing the interference power distribution, and calculates a signal-to-noise ratio (SINR); and a reception unit that receives a signal from the reception target terminal if the device is configured to receive the signal from the reception target terminal. The present technology can be applied to, for example, a satellite reception station for receiving a signal from a terminal that uses Internet of Things (IoT) technology.

Description

Receiving device, receiving method, data processing device, data processing method

[0001] The present technology relates to a receiving device, a receiving method, a data processing device, and a data processing method, and more particularly, to a receiving device, a receiving method, a data processing device, and a data processing method suitable for use in a system applying IoT technology.

[0002] As a communication technology for IoT (Internet of Things), a wireless technology capable of long-distance communication in one direction (from a transmitting terminal to a receiving station) has been proposed (see, for example, Patent Document 1).

[0003] It has been proposed to form and transmit a beam directed to a ground station based on position information, and for the ground station to also have an array antenna unit, and for both the aircraft and the ground station to perform beamforming to continue communication (see, for example, Patent Document 2).

[0004] Japanese Patent No. 6259550 Japanese Patent Application Laid-Open No. 2014-207626

[0005] In a receiving-side terminal that receives signals from IoT terminals, it is desired to perform reception with reduced interference effects and to be able to cover a wide range even with a small number of terminals.

[0006] The present technology has been made in view of such a situation, and performs reception with reduced interference effects and enables a wide range to be covered even with a small number of terminals.

[0007] A receiving device according to one aspect of the present technology includes an interference amount calculation unit that calculates an interference amount that interferes with a desired reception wave, an interference map that represents a distribution of the interference amount, a SINR calculation unit that acquires position information of a reception target terminal and calculates SINR (Signal to Noise Ratio), and a reception unit that receives a signal from the reception target terminal when it is set to receive the signal from the reception target terminal.

[0008] One aspect of this technology is a receiving method in which a receiving device that receives signals from a target terminal calculates the amount of interference that interferes with the desired wave to be received, obtains an interference map representing the distribution of the amount of interference and the location information of the target terminal, calculates the SINR (Signal to Noise Ratio), and receives the signal from the target terminal if it is set to receive the signal from the target terminal.

[0009] One aspect of this technology is a data processing device comprising: an acquisition unit that acquires data obtained when the beam is pointed directly downwards from a receiving device that receives signals from a target terminal using a beam generated by digital beamforming; an interference amount calculation unit that calculates the amount of interference that interferes with the desired reception wave using the data acquired by the acquisition unit; a generation unit that generates an interference map representing the distribution of the interference amount; a SINR calculation unit that calculates the SINR (Signal to Noise Ratio) for each beam generated by digital beamforming at the position on the interference map corresponding to the position where the target terminal is installed, and calculates the maximum SINR with the largest value; and a setting unit that sets the receiving device with the largest maximum SINR among a plurality of receiving devices associated with the target terminal as the receiving device that receives signals from the target terminal.

[0010] One aspect of this technology is a data processing method in which a data processing device receives and processes data from a receiving device that receives signals from a target terminal using a beam generated by digital beamforming, obtains data from the receiving device obtained when the beam is pointed directly downwards, calculates the amount of interference that interferes with the desired wave to be received using the obtained data, generates an interference map representing the distribution of the amount of interference, calculates the SINR (Signal to Noise Ratio) for each beam generated by digital beamforming at the position on the interference map corresponding to the position where the target terminal is installed, calculates the maximum SINR with the largest value, and sets the receiving device with the largest maximum SINR among the maximum SINRs of a plurality of receiving devices associated with the target terminal as the receiving device that receives signals from the target terminal.

[0011] In one aspect of this technology, the receiving device and receiving method calculate the amount of interference that interferes with the desired wave to be received, obtain an interference map representing the distribution of the interference amount and the location information of the receiving terminal, calculate the SINR (Signal to Noise Ratio), and if it is set to receive a signal from the receiving terminal, the signal from the receiving terminal is received.

[0012] In one aspect of this technology, a data processing device and data processing method, data is acquired from a receiving device that receives signals from a target terminal using a beam generated by digital beamforming when the beam is pointed directly downwards. The acquired data is used to calculate the amount of interference that interferes with the desired reception wave, and an interference map representing the distribution of interference amounts is generated. At the location on the interference map corresponding to the location where the target terminal is installed, the SINR (Signal to Noise Ratio) is calculated for each beam generated by digital beamforming, the maximum SINR with the largest value is calculated, and among the maximum SINRs of multiple receiving devices associated with the target terminal, the receiving device with the largest maximum SINR is set as the receiving device that receives signals from the target terminal.

[0013] The receiving device and data processing device may be independent devices or internal blocks that make up a single device.

[0014] This is a diagram illustrating an example configuration of one embodiment of a data processing system to which this technology is applied. This is a diagram illustrating beamwidth-controlled reception. This is a diagram illustrating beamwidth control. This is a diagram illustrating an example configuration of the antenna section. This is a diagram illustrating an example configuration of the received signal generation section. This is a diagram illustrating an example configuration of a satellite receiving station. This is a diagram illustrating an example configuration of a transmitting terminal. This is a diagram illustrating the selection of a satellite receiving station. This is a diagram illustrating the first process. This is a diagram illustrating an interference map. This is a diagram illustrating the second process. This is a diagram illustrating an example configuration of a PC.

[0015] The following describes the embodiments for implementing this technology.

[0016] <Configuration of the Data Processing System> Since this technology can be applied to data processing systems using IoT (Internet of Things), we will explain this technology using such a system as an example.

[0017] Figure 1 shows the configuration of one embodiment of a data processing system to which this technology is applied. The data processing system 1 includes a satellite receiving station 11 and transmitting terminals 21-1 to 21-3. The satellite receiving station 11 receives and processes data transmitted from transmitting terminals 21-1 to 21-3 at predetermined intervals. IoT technology can be applied to the data processing system 1.

[0018] IoT enables the acquisition of information from transmitting terminals 21-1 to 21-3 installed in mountainous areas and at sea, where information acquisition was previously difficult. It is hoped that observations based on the acquired information will enable the understanding of environmental changes and the prevention of disasters. On the other hand, the installation of receiving stations has been a challenge. In mountainous areas, the number of terminals is expected to be smaller than in urban areas, raising concerns that the cost of installing and operating receiving stations for these few terminals will be high. There were also concerns that installing receiving stations at sea would be difficult.

[0019] Therefore, as shown in Figure 1, a wireless system is constructed using satellite receiving stations 11, which are mainly mounted on low-Earth orbit satellites. By using satellite receiving stations 11, it is possible to create a wireless technology for IoT that enables long-distance communication. It is also possible to construct a wireless system that combines ground receiving stations and satellite receiving stations 11, making it possible to acquire information from anywhere on Earth at low cost.

[0020] Because low Earth orbit satellites orbit at an altitude of approximately 400 km, using a standard receiving antenna results in a very wide reception range. Consequently, many interfering signals other than the desired signal are also received, potentially degrading the signal-to-noise ratio (SNR) of the received signal and making communication difficult. The conical receiving antenna range shown in Figure 1 represents the range in which a certain level of antenna gain can be obtained with the receiving antenna mounted on the satellite receiving station 11. For example, it shows the range where the receiving antenna gain drops by 3 dB from its peak.

[0021] Figure 1 also shows interference sources 23-1 to 23-3. Interference sources 23-1 to 23-3 are terminals that emit radio signals that become interference sources when receiving radio signals from transmitting terminals 21-1 to 21-3. For example, if the 920MHz band is used for communication between the satellite receiving station 11 and transmitting terminals 21-1 to 21-3, the 920MHz band is shared with other systems, so transmitting terminals of other systems may become interference sources.

[0022] In the example shown in Figure 1, the satellite receiving station 11 can receive signals from transmitting terminals 21-1 to 21-3, which are located within the receiving antenna range, as the desired signal, but it also receives signals from interference sources 23-1 to 23-3. Receiving signals other than the desired signal, in this case from interference sources 23-1 to 23-3, may worsen the signal-to-noise ratio of the desired signal from transmitting terminals 21-1 to 21-3.

[0023] One method to reduce the received interference waves is to narrow the beamwidth of the receiving antenna of the satellite receiving station 11. One technique for controlling the beamwidth of the receiving antenna is called a phased array. A phased array is a technique that can narrow the beamwidth by digitally processing the signals received by multiple receiving antennas, and it is a highly versatile technique for satellites, which have size constraints. Furthermore, by changing the digital processing, it is possible to form beam peaks in any direction, and by combining multiple beams, it is possible to receive signals over a wider area.

[0024] For example, as shown in Figure 2, if the transmitting terminal 21-1 is directly below the satellite receiving station 11-1, the satellite receiving station 11-1 can form a beam peak directly below it, and use such a beam to receive the signal from the transmitting terminal 21-1. The transmitting terminal 21-1 is within the interference source 23-1 and may be subject to interference, but the beam can be narrowed to include the transmitting terminal 21-1 while minimizing the interference source 23-1, and by using such a beam for reception, reception with reduced interference effects can be achieved.

[0025] The satellite receiving station 11-2 shown in Figure 2 is also capable of forming a beam peak in any direction. For example, it can form a beam peak at a position aligned with the transmitting terminal 21-3, enabling efficient reception.

[0026] The data received by the satellite receiving station 11 is transmitted to the ground server 13. The ground server 13 is a server located on the ground that manages multiple satellite receiving stations 11, receives data from each satellite receiving station 11, performs necessary processing, and instructs the satellite receiving stations 11 to receive data from the transmitting terminal 21, as will be described later. The ground server 13 manages information such as the location and type of the transmitting terminal 21, for example, whether it is installed on a mobile device.

[0027] This will be explained further with reference to Figure 3.

[0028] In the example shown in Figure 3A, a technique called a phased array is applied to the receiving antenna of the satellite receiving station 11, optimizing the beamwidth for the transmitting terminal 21-1 and controlling the beam to point towards the transmitting terminal 21. In this case, the reception of the desired wave from the transmitting terminal 21-1 is subject to interference from the interference source 23, but because the beamwidth is narrow, or in other words, the receiving antenna range is narrow, the amount of interference waves received from the interference source 23 is also reduced, thereby mitigating the effects of interference waves.

[0029] In the example shown in Figure 3B, the beam width and beam direction are optimized for the transmitting terminal 21-3. In this case, the desired signal from the transmitting terminal 21-3 can be received without interference from any of the interference sources 23-1 to 23-3. In the example shown in Figure 3C, the beam width and beam direction are optimized for the transmitting terminal 21-3. In this case, the desired signal from the transmitting terminal 21-3 can be received without interference from any of the interference sources 23-1 to 23-3.

[0030] By optimizing the beamwidth for the transmitting terminal you want to receive signals from, you can achieve good reception with reduced interference.

[0031] <Regarding Reception Conditions> Here, we consider the conditions for receiving the radio signals from transmitting terminals 21-1 to 21-3. Whether or not the radio signal from transmitting terminal 21 can be received depends on whether the SINR (Signal to Noise Ratio) is above a certain value. Note that this certain value is determined by the radio technology used. The SINR can be expressed by the following equation (1).

[0032]

[0033] In equation (1), S is the received power of the transmitting terminal 21, N is the thermal noise power of the satellite receiving station 11, and I is the total received power from the interference source 23. Furthermore, the received power S can be expressed by the following equation (2), and the total received power I can be expressed by the following equation (3).

[0034]

[0035] In equations (2) and (3), Ptx is the transmission power of the transmitting terminal 21, Gtx is the transmitting antenna gain of the transmitting terminal 21, PL is the propagation path loss, and Grx is the receiving antenna gain. The received power S is the value for the transmitting terminal 21 that is the target of reception, and the transmitted and received power I is the sum from the transmitting terminals present in the interference source 23 within the reception range.

[0036] From the definition of SINR (Equation (1)), it can be seen that as the interference amount I increases, the SINR decreases, potentially making reception difficult. To improve reception accuracy, it is possible to increase the value of SINR. To increase the value of SINR, we consider decreasing the interference amount I. From the definition of interference amount I (Equation (3)), the only value that can be controlled on the satellite receiving station 11 side is the receiving antenna gain Grx. The transmission power Ptx and the transmission antenna gain Gtx are values ​​controlled on the transmitting terminal 21 side, and the propagation path loss PL is a value that depends on the distance between the transmitting terminal 21 and the satellite receiving station 11. Therefore, considering the control of interference amount I on the receiving side, it is possible to decrease the receiving antenna gain Grx.

[0037] As explained with reference to Figure 3, by controlling the beam width and beam direction, reception can be performed with reduced interference from the interference source 23. As shown in Figure 3, by directing the receiving antenna gain towards the transmitting terminal 21, which is the target of reception, and simultaneously narrowing the receiving antenna range to reduce interference from the interference source 23, the possibility of receiving signals from the transmitting terminal 21 can be increased.

[0038] In this way, the satellite receiving station 11 (receiving side) can control the receiving antenna gain Grx to reduce the interference amount I, increase the SINR, and thereby increase the probability of successfully receiving the signal from the transmitting terminal 21.

[0039] <Beam Formation Method> Digital beamforming technology can be applied as a method to control the receiving antenna gain Grx at the satellite receiving station 11. Digital beamforming will be explained with reference to Figure 4.

[0040] Figure 4A shows an example of the configuration of the receiving antenna unit 31 of the satellite receiving station 11. The receiving antenna unit 31 has a plurality of antenna elements 32 on its antenna surface. In the example shown in Figure 4A, eight antennas, antenna elements 32-1 to 32-8, are provided on the antenna surface. Hereafter, when it is not necessary to distinguish between antenna elements 32-1 to 32-8 individually, they will simply be referred to as antenna elements 32. For example, omnidirectional antennas can be used as antenna elements 32.

[0041] Here, we will continue the explanation using the example of a system with eight antenna elements 32 arranged in a 2x4 configuration. However, this description does not imply any limitations on the number or arrangement of antenna elements 32. This technology can be applied to eight or fewer antenna elements 32, or to arrangements other than 2x4.

[0042] B in FIG. 4 is a diagram showing the relationship between the antenna surface and the incident wave. The incident wave is shown as being incident from the directions of angles α and β with respect to the antenna surface. Angle α is the angle of the incident wave in the XY plane, and angle β represents the angle of the incident wave in the YZ plane. Antenna elements 32-1 to 32-8 receive the incident waves incident from the directions of angles α and β respectively. The timing of receiving the incident wave incident at such an angle, in other words, the incident wave incident on the antenna surface from the diagonally right direction in FIG. 4, is different between antenna elements 32-1 and 32-2. For example, antenna element 32-8 receives the incident wave earlier than antenna element 32-2.

[0043] The shift in receiving the incident wave means that the phase is shifted by that amount when received. When appropriate phases are corrected and then added together for the digital signals received by the plurality of antenna elements 32, control can be performed such that the phases match appropriately when coming from a specific direction, and it becomes possible to form a beam with the maximum gain in a specific direction.

[0044] As shown in FIG. 5, in digital beamforming, for the signals received by each antenna element 32, the phase is multiplied by a multiplier 33 and added by an adder 34 to generate a received signal. The received signal generation unit 40 shown in FIG. 5 includes a multiplier 33-1 that multiplies an appropriate phase to the signal from antenna element 32-1 provided on the antenna surface of the receiving antenna unit 31, a multiplier 33-2 that multiplies an appropriate phase to the signal from antenna element 32-2, a multiplier 33-3 that multiplies an appropriate phase to the signal from antenna element 32-3, and a multiplier 33-4 that multiplies an appropriate phase to the signal from antenna element 32-4.

[0045] The received signal generation unit 40 also includes a multiplier 33-5 that multiplies an appropriate phase to the signal from antenna element 32-5, a multiplier 33-6 that multiplies an appropriate phase to the signal from antenna element 32-6, a multiplier 33-7 that multiplies an appropriate phase to the signal from antenna element 32-7, and a multiplier 33-8 that multiplies an appropriate phase to the signal from antenna element 32-8.

[0046] The reception signal generation unit 40 includes an addition unit 34 that adds the outputs from the multiplication units 33-1 to 33-8. In the addition unit 34, signals from each of the multiplication units 33-1 to 33-8 are added to generate a reception signal.

[0047] Various beams can be formed by the phase multiplied by the multiplication unit 33 of the reception signal generation unit 40. For example, when forming a beam peak in the direction of the incident waves (α, β) as shown in B of FIG. 4, it is possible to determine the phase based on the following equation (4). In equation (4), dx and dy are the arrangement intervals between the antenna elements 32, and λ represents the wavelength of the carrier wave.

[0048]

[0049] Also, by setting the coefficient of a specific antenna element 32 to zero, for example, by setting the coefficient multiplied by the multiplication unit 33 of the reception signal generation unit 40 shown in FIG. 5 to 0, it is also possible to change the number of reception antennas used for digital beamforming. For example, it is possible to use only 4 out of 8 reception antennas. It is also possible to change the beam shape according to the number of reception antennas used.

[0050] <Configuration example of satellite receiving station> A configuration example of a satellite receiving station 11 that performs reception using digital beamforming will be described with reference to FIG. 6.

[0051] The satellite receiving station 11 is configured to include an antenna 101, an antenna 102, an antenna 103, a GNSS (Global Navigation Satellite System) receiving unit 104, a terrestrial server communication unit 105, a SINR calculation unit 106, an analog receiving unit 107, a digital signal decoding unit 108, and a beam control unit 109.

[0052] The GNSS receiving unit 104 acquires the position information (described as self-position information) and time information of the satellite receiving station 11 using a satellite positioning system. The antenna 101 is provided as an antenna for communicating with satellites in the satellite positioning system. The self-position information and time information acquired by the GNSS receiving unit 104 are supplied to the terrestrial server communication unit 105 as necessary.

[0053] The ground server communication unit 105 communicates with the ground server 13 (Figure 2). The antenna 102 is provided as an antenna for communicating with the ground server 13. The SINR calculation unit 106 calculates the SINR described above. The SINR calculated by the SINR calculation unit 106 is supplied to the ground server communication unit 105 and transmitted to the ground server 13 along with the self-position information and time information acquired by the GNSS receiving unit 104.

[0054] The analog receiving unit 107 receives wireless signals from the transmitting terminal 21 via the antenna 103. When using the phased array technology described above, the antenna 103 is configured to have multiple antenna elements 32, as shown in Figure 4.

[0055] The digital signal decoding unit 108 combines the signals acquired by the analog receiving unit 107 using coefficients supplied by the beam control unit 109. After the combination process, the digital signal decoding unit 108 acquires sensor information transmitted from the transmitting terminal 21 by performing decryption processing for encryption and error correction signal processing. The digital signal decoding unit 108 also performs processing related to the measurement of interference power, which will be described later.

[0056] When phased array technology is used, the beam control unit 109 supplies multiple beam coefficients to the digital signal decoding unit 108, and the SINR calculation unit 106 obtains the beam coefficient that shows the maximum SINR and supplies it to the digital signal decoding unit 108.

[0057] <Example of Transmitting Terminal Configuration> Figure 7 shows an example of the configuration of the transmitting terminal 21. The transmitting terminal 21 is configured to include an antenna 201, an antenna 202, a GNSS receiving unit 203, a sensor 204, a digital signal generation unit 205, and an analog transmitting unit 206.

[0058] The GNSS receiver 203 acquires location information (referred to as self-position information) and time information of the transmitting terminal 21 using the satellite positioning system. The antenna 201 is provided as an antenna for communicating with satellites in the satellite positioning system. The self-position information and time information acquired by the GNSS receiver 203 are supplied to the digital signal generation unit 205 as needed.

[0059] The sensor 204 is, for example, a temperature sensor or a humidity sensor, and the transmitting terminal 21 is equipped with a sensor 204 suitable for the information to be acquired. The data acquired by the sensor 204 is supplied to the digital signal generation unit 205.

[0060] The digital signal generation unit 205 processes the data acquired and supplied by the sensor 204 into a wireless transmission frame. Specifically, it encrypts the data and performs correction signal processing before supplying it to the analog transmission unit 206. The digital signal generation unit 205 also determines the transmission time and the analog frequency to be transmitted based on the information acquired by the GNSS receiver unit 203, and supplies these to the analog transmission unit 206.

[0061] The analog transmission unit 206 converts the transmission radio frame generated by the digital signal generation unit 205 into a high frequency and radiates (transmits) it via the antenna 202. The antenna 202 is provided for communication with the satellite receiving station 11.

[0062] <Selection of Satellite Receiving Stations> Referring to Figure 8, the selection of satellite receiving stations 11 that receive signals from the transmitting terminal 21 will be explained. The situation shown in Figure 8 shows that satellite receiving station 11-1 has its beam gain directed toward the transmitting terminal 21 so that it can receive signals from the transmitting terminal 21 as a receiving terminal. Similarly, the situation shown in Figure 8 shows that satellite receiving station 11-2 has its beam gain directed toward the transmitting terminal 21 so that it can receive signals from the transmitting terminal 21 as a receiving terminal.

[0063] In the situation shown in Figure 8, satellite receiving station 11-1 and satellite receiving station 11-2 may have their beam gains directed toward the transmitting terminal 21 at the same time, or they may have their beam gains directed toward the transmitting terminal 21 at different times.

[0064] By applying beamforming, the direction in which the beam gain is directed can be changed, so that both satellite receiving station 11-1 and satellite receiving station 11-2 can receive signals from the transmitting terminal 21. Even when a state in which reception is possible can be created by multiple satellite receiving stations 11 in this way, the SINR of the multiple satellite receiving stations 11 will differ, and the SINR of the satellite receiving station 11 in which the beam gain is directed to the location where the interference source is present will decrease.

[0065] Since satellite receiving stations 11 with a higher SINR value are considered to be more likely to receive radio signals from the transmitting terminal 21, if reception is possible at multiple satellite receiving stations 11 for a single transmitting terminal 21, reception will be performed at the satellite receiving station 11 with the higher SINR value. In this way, reception will be performed at the satellite receiving station 11 that is more likely to receive the signal from the transmitting terminal 21 reliably, preventing multiple satellite receiving stations 11 from receiving the signal from the transmitting terminal 21 redundantly, and enabling efficient reception.

[0066] Incidentally, in wireless systems using low-Earth orbit satellites, the use of a technology called a satellite constellation is being considered. In a satellite constellation, it is thought that by using multiple low-Earth orbit satellites (satellites corresponding to satellite receiving stations 11), the entire Earth's surface can be made available for communication.

[0067] On the other hand, the number of satellite receiving stations is reflected in communication costs, so from a service perspective, fewer stations are desirable as they reduce costs. It is thought that individual satellite receiving stations can adopt phased array technology, which would allow for wider coverage while reducing the number of satellite receiving stations.

[0068] As explained with reference to Figure 8, by forming beam peaks at the same location on the ground from multiple satellite receiving stations 11, it becomes possible to create a state where reception is possible at any of the satellite receiving stations 11. However, it is difficult to provide excessive signal processing capabilities for individual satellite receiving stations 11 due to limitations in the processing capabilities of the power supply and computing device. For this reason, when reception is possible at multiple satellite receiving stations 11, by pre-setting which satellite receiving station 11 will perform the reception processing, the unselected satellite receiving station 11 can be assigned to the reception processing of other transmitting terminals 21, thereby increasing the number of transmitting terminals 21 (ground terminals that are the target of reception) that can perform reception processing in the entire system.

[0069] We will now explain the process of setting which satellite receiving station 11 is responsible for receiving signals from a designated transmitting terminal 21. To explain this setting process, please refer to Figure 8 again.

[0070] When satellite receiving station 11-2 directs its beam gain in the direction of the transmitting terminal 21, which is the receiving terminal, it directs its beam gain into the range that includes the interference source 23. In this case, the value of interference I included when calculating the SINR becomes large, and as a result the SINR value becomes small. On the other hand, when satellite receiving station 11-1 directs its beam gain in the direction of the transmitting terminal 21, which is the receiving terminal, it can direct its beam gain into the range that does not include the interference source, and the value of interference I included when calculating the SINR becomes small, and as a result the SINR value becomes large.

[0071] In the reception situation shown in Figure 8, satellite receiving station 11-1, which has a high SINR value, is set to receive signals from transmitting terminal 21. In other words, satellite receiving station 11-2, which has a low SINR value, is set not to receive signals from transmitting terminal 21. In such a case, satellite receiving station 11-2 can be set (assigned) to receive signals from other transmitting terminals 21 with high SINR values, and processing capacity can be allocated to receiving signals from other transmitting terminals 21. Therefore, in this case, the satellite receiving system including satellite receiving stations 11-1 and 11-2 can perform reception efficiently and cover a wide area as a reception area.

[0072] <First Processing in the Satellite Receiving System> Referring to the flowchart in Figure 9, the first processing in the satellite receiving system will be explained. Here, the processing related to the selection and setting of the satellite receiving station 11 responsible for receiving signals from the predetermined transmitting terminal 21 described above will be explained. An example will be given in which the satellite system includes a ground server 13, satellite receiving station 11-1, and satellite receiving station 11-2.

[0073] In step S41, satellite receiving station 11-1 measures the amount of interference. Similarly, in step S61, satellite receiving station 11-2 measures the amount of interference. Since the processes performed by satellite receiving station 11-1 and satellite receiving station 11-2 are basically the same, the explanation will continue below using the process performed by satellite receiving station 11-1 as an example.

[0074] The measurement of interference is a process of measuring and recording the location and strength of the interference source, and is performed periodically or based on instructions from the ground server 13. The location of the interference source is the location of the satellite receiving station 11-1 at the time the measurement is performed, and the self-position information received by the GNSS receiving unit 104 is used.

[0075] The interference amount is measured with the beam gain directed directly below the satellite receiving station 11-1. When the beam gain is directed directly downwards, the beam width can be made as narrow as possible, allowing for accurate measurement of the intensity at a given location. The interference amount can be calculated from the following equation (5). Equation (5) is obtained by removing the receiving antenna gain Grx and the propagation path loss PL from equation (3).

[0076] The receiving antenna gain Grx is the gain of the receiving antenna of the satellite receiving station 11-1 itself, and is self-evident. The propagation path loss PL can be calculated from the altitude of the satellite receiving station 11-1 using the formula for free-space propagation loss. The interference amount values ​​obtained in step S41 are used when creating an interference map 301 (Figure 10) that lists the interference amount for each location, as will be described later. The created interference map 301 is used when each satellite receiving station 11 calculates the SINR when it performs its own receiving process at a predetermined location within the interference map 301.

[0077] In step S41, the interference amount may be calculated based on equation (3), or it may be calculated based on equation (5), which is a simplified version of equation (3). By calculating the interference amount based on equation (5), the amount of computation can be reduced, and processing power can be reduced. Furthermore, even if the interference amount calculated based on equation (5) is used, each satellite receiving station 11 can calculate its own SINR in a later processing step, so here we will continue the explanation assuming that the interference amount is calculated based on equation (5).

[0078] Since the interference amount is used when calculating the SINR, the processing in step SS41 can be configured so that the SINR calculation unit 106 (Figure 6) performs the calculation. The interference amount calculated by the SINR calculation unit 106 is supplied to the ground server communication unit 105 (Figure 6). The ground server communication unit 105 is also supplied with the position information of the satellite receiving station 11-1 at the time of measurement from the GNSS receiving unit 104. The ground server communication unit 105 transmits the interference amount and position information in association to the ground server 13.

[0079] At satellite receiving station 11-2, the same process as at satellite receiving station 11-1 is performed to obtain information on the amount of interference measured at satellite receiving station 11-2 and the position of satellite receiving station 11-2 at the time the interference was measured, and transmit this information to ground server 13.

[0080] In step S11, the ground server 13 receives interference amount and location information from satellite receiving station 11-1, and in step S12, it receives interference amount and location information from satellite receiving station 11-2. The ground server 13 receives (acquires) information from multiple satellite receiving stations 11, including the interference amount measured at each satellite receiving station 11 and the location where that interference amount was measured.

[0081] In step S13, the ground server 13 generates an interference map 301. The interference map 301 will be described with reference to Figure 10. Figure 10 is a diagram showing an example of the interference map 301.

[0082] The interference map 301 is a map that divides the ground into multiple blocks, and each block contains the amount of interference associated with the position information from the satellite receiving station 11 that matches the position information of that block. Each block contains position information (latitude, longitude) and the amount of interference (interference power).

[0083] The interference map 301 can also be described as a map representing the distribution of interference strength. The interference map 301 shown in Figure 10 is a map composed of 15 horizontal blocks and 8 vertical blocks. Note that the description of the interference map 301 does not indicate that it is a 15x8 block. Furthermore, the interference map 301 shown in Figure 10 is a map that covers at least the entire area within the range managed by the ground server 13, and Figure 8 illustrates, for example, a 15x8 block within that map. The size of a single block can be any size, but for example, it can be a size corresponding to the range in which a signal can be received when a single satellite receiving station 11 points its gain peak directly downwards.

[0084] In the interference map 301 shown in Figure 8, for example, the 15 blocks in row 301-1 contain location information and interference amounts supplied by satellite receiving station 11-1, the 15 blocks in row 301-2 contain location information and interference amounts supplied by satellite receiving station 11-2, and the 15 blocks in row 301-3 contain location information and interference amounts supplied by satellite receiving station 11-3 (not shown). In other words, information from different satellite receiving stations 11 is recorded in each row. It should be noted that it is a matter of design, not limited to, that information from different satellite receiving stations 11 be recorded in each column.

[0085] The interference map 301 is a map created by recording information obtained from multiple satellite receiving stations 11 in corresponding blocks.

[0086] In step S14, the ground server 13 transmits the created interference map 301 and the receiving terminal information to the satellite receiving station 11-1. In step S15, the ground server 13 transmits the created interference map 301 and the receiving terminal information to the satellite receiving station 11-2. The interference map 301 and the receiving terminal information transmitted to satellite receiving station 11-1 and satellite receiving station 11-2 are the same information.

[0087] The receiving terminal information is information about the terminal that is the target of signal reception, i.e., the transmitting terminal 21, and mainly the location information of where the transmitting terminal 21 is installed. The ground server 13 manages the installation location of the transmitting terminal 21 and supplies the location information it manages to the satellite receiving station 11. The installation location of the transmitting terminal 21 is, for example, the location registered at the time of contract or the location of the terminal in question acquired last time. The location of the terminal in question acquired last time can be used, for example, if sensor information acquired by a sensor 204 (Figure 7) of a predetermined transmitting terminal 21 is associated with the location information of the transmitting terminal 21 acquired by the GNSS receiving unit 203 (Figure 7) and acquired via the satellite receiving station 11, then that acquired location information can be used.

[0088] In step S43, satellite receiving station 11-1 calculates the SINR and transmits the calculation result to ground server 13. Similarly, in step S63, satellite receiving station 11-2 calculates the SINR and transmits the calculation result to ground server 13.

[0089] SINR is calculated based on the following formula (6).

[0090] Equation (6) is essentially the same as equation (1) with equations (2) and (3) substituted in, but equation (6) indicates that it is the SINR when a predetermined beam is used. As described above, the satellite receiving station 11 is capable of creating beams with different beam widths and beam directions, and is configured to form multiple beams. The satellite receiving station 11 selects one block in the interference map 301, and uses the position information and interference amount described in that block to perform calculations based on equation (6) for each beam to calculate the SINR. For example, if 10 beams can be formed, 10 SINRs will be calculated for one block.

[0091] Of the interference map 301, the blocks selected as the blocks for which the SINR is calculated are selected by referring to the location information of the transmitting terminal 21 supplied from the ground server 13, and the blocks containing the location indicated by that location information are selected.

[0092] In equation (6), the numerator represents the received power of the receiving terminal (transmitting terminal 21). In equation (6), Ps-tx represents the transmitted power, and Gs-tx represents the gain of the transmitting antenna. The transmitted power Ps-tx and the transmitting antenna gain Gs-tx are values ​​determined as per the system's usage and are trivial (obtainable and calculable). PL is the propagation loss, and the propagation loss PL can be determined by calculating the distance between the position information of the transmitting terminal 21 obtained from the ground server 13 and the position information of the satellite receiving station 11 itself, and using the free-space propagation loss.

[0093] The denominator of equation (6) is the interference power and thermal noise (N). The interference power is the interference amount listed in each block of the interference map 301. The interference power (interference amount) is listed in the interference map 301 as the product of (Pi-tx) and (Gi-tx), and this value is used. The interference map 301 also lists the measurement location when the interference amount was obtained, and from that measurement location and the location of the satellite receiving station 11, the beam gain Gbeam(X) and propagation loss PL can be calculated, and the received interference power is calculated by accumulating these values.

[0094] At the satellite receiving station 11, the SINR is calculated for each block in the interference map 301 where a transmitting terminal 21 is determined to be installed, and for each beam that can be formed in one block. For example, if 10 transmitting terminals 21 are installed in the interference map 301 and the satellite receiving station 11 can form 10 different types of beams, then the SINR is calculated for each of the 10 transmitting terminals 21 and each of the 10 different types of beams, resulting in 100 SINRs being calculated.

[0095] The location information of the transmitting terminal 21 and the maximum value of the SINR are associated and transmitted to the ground server 13. For each beam of a single transmitting terminal 21, the SINR is calculated, and the SINR with the maximum value among the multiple calculated SINRs is transmitted to the ground server 13 as the SINR of the transmitting terminal 21 for which the SINR calculation was performed. In other words, the SINR of the best-case scenario for the transmitting terminal 21 being processed is transmitted to the ground server 13.

[0096] The ground server 13 may be configured to receive information that associates the location information of the transmitting terminal 21 with the maximum SINR, or it may be configured to receive an interference map 301 containing the maximum SINR calculated for each block in the interference map 301 where the SINR has been calculated.

[0097] In step S16, the ground server 13 receives the maximum SINR from satellite receiving station 11-1, and in step S17, it receives the maximum SINR from satellite receiving station 11-2. In step S18, the ground server 13 performs satellite receiving station determination processing. Satellite receiving station determination processing is the process of determining the satellite receiving station 11 that can receive the signal from the transmitting terminal 21 most efficiently and reliably.

[0098] The ground server 13 is supplied with the maximum SINR calculated by each of the multiple satellite receiving stations 11. The ground server 13 stores and manages multiple maximum SINRs calculated by the multiple satellite receiving stations 11 for a single transmitting terminal 21. The ground server 13 extracts the largest SINR from among the multiple maximum SINRs associated with a single transmitting terminal 21, and determines that the satellite receiving station 11 that calculated the extracted SINR will be the satellite receiving station 11 responsible for receiving the signal from that transmitting terminal 21.

[0099] The satellite receiving station 11 is selected that can form a beam capable of receiving signals from the transmitting terminal 21 while being least affected by interference sources.

[0100] In step S18, when the satellite receiving station is determined, the ground server 13 issues an instruction to the determined satellite receiving station to perform the receiving process for the receiving terminal (transmitting terminal 21) (step S19).

[0101] The flowchart in Figure 9 shows the case where the ground server 13 decides that satellite receiving station 11-1 will perform the receiving process for the transmitting terminal 21. In this case, in step S19, an instruction to perform the receiving process is issued to satellite receiving station 11-1. No instruction is sent to satellite receiving station 11-2, which was not selected, but an instruction is issued to perform the receiving process for the other transmitting terminals 21 that satellite receiving station 11-1 is not responsible for receiving.

[0102] In step S44, the satellite receiving station 11-1 performs reception processing on the transmitting terminal 21, which has been instructed by the ground server 13 to perform reception processing, receives the signal from the transmitting terminal 21, and transmits the reception result to the ground server 13 in step S45. The satellite receiving station 11-1 transmits the IQ data, which is the signal acquired by the analog receiving unit 107 (Figure 6) and converted into digital data by the digital signal decoding unit 108, to the ground server 13 via the ground server communication unit 105.

[0103] In step S20, the ground server 13 receives the IQ signal from the satellite receiving station 11-1 and performs the necessary processing.

[0104] This process allows for the determination of the optimal satellite receiving station 11 when multiple low-Earth orbit satellite receiving stations 11 receive transmission signals from ground terminals (transmitting terminals 21). By distributing the reception processing among multiple low-Earth orbit satellite receiving stations 11, the number of transmitting terminals 21 that can be processed by the entire system can be increased. A system with a wide communication range can be constructed with fewer satellite receiving stations 11. By reducing the processing load on the satellite receiving stations 11, the power consumption of the satellite receiving stations 11 can be reduced.

[0105] <Second Processing in the Satellite Receiving System> Referring to the flowchart in Figure 11, we will now explain the second processing in the satellite receiving system. In the first processing, which was explained with reference to Figure 9, the process of measuring interference and calculating SINR was explained using the example of the satellite receiving station 11. However, we will now explain the case where these processes are performed on the ground server 13 side, referring to the flowchart in Figure 11.

[0106] By having the ground server 13 perform processes such as interference measurement and SINR calculation, the processing required by the satellite receiving station 11 can be reduced, thereby lowering the processing capacity of the satellite receiving station 11 and reducing power consumption. Furthermore, it is relatively easy to increase the processing capacity of the ground server 13 compared to the satellite receiving station 11, or to take measures to cope if power consumption increases.

[0107] In step S141, satellite receiving station 11-1 transmits IQ data to ground server 13. Similarly, in step S161, satellite receiving station 11-2 transmits IQ data to ground server 13.

[0108] Satellite receiving station 11-1 transmits the IQ data, which is the signal acquired by the analog receiving unit 107 (Figure 6) and converted into digital data by the digital signal decoding unit 108, to the ground server 13 via the ground server communication unit 105. The same process is performed at satellite receiving station 11-2, so that the IQ data acquired at satellite receiving station 11-2 is transmitted to the ground server 13.

[0109] In step S101, the ground server 13 receives IQ data from satellite receiving station 11-1, and in step S102, it receives IQ data from satellite receiving station 11-2. Since the ground server 13 receives IQ data from each of the multiple satellite receiving stations 11, it stores IQ data from multiple locations.

[0110] In step S103, the ground server 13 performs interference measurement. The interference measurement performed in step S103 is carried out in the same way as the interference measurement process performed by the satellite receiving station 11-1 in step S41 of the flowchart in Figure 9, and is performed using the received IQ data. The ground server 13 calculates the interference amount for each satellite receiving station 11 and for each location corresponding to a block in the interference map 301.

[0111] In step S104, the ground server 13 generates an interference map. The generation of the interference map performed in step S104 is carried out in the same way as the interference map generation process performed by the ground server 13 in step S13 of the flowchart in Figure 9.

[0112] In step S105, the ground server 13 calculates the SINR. The SINR calculation performed in step S105 is performed in the same way as the SINR calculation process performed by the satellite receiving station 11-1 in step S43 of the flowchart in Figure 9. The ground server 13 calculates the SINR for each satellite receiving station 11, for each location corresponding to the block where the transmitting terminal 21 on the interference map 301 is installed, and for each beam that the satellite receiving station 11 can form.

[0113] In step S106, the ground server 13 determines, for each transmitting terminal 21, the satellite receiving station 11 that will receive the signal transmitted from the transmitting terminal 21. The satellite receiving station determination process performed in step S106 is the same as the satellite receiving station determination process performed by the ground server 13 in step S18 of the flowchart in Figure 9. The ground server 13 sends information (such as location information) of the transmitting terminal 21 to be received as a reception instruction to each satellite receiving station 11.

[0114] In step S142, when satellite receiving station 11-1 receives a reception instruction from ground server 13, in step S143, it receives a signal from the designated transmitting terminal 21 based on that instruction and transmits it to ground server 13 as IQ data. Similarly, in step S162, when satellite receiving station 11-2 receives a reception instruction from ground server 13, in step S163, it receives a signal from the designated transmitting terminal 21 based on that instruction and transmits it to ground server 13 as IQ data.

[0115] Satellite receiving stations 11-1 and 11-2 are each instructed to designate different transmitting terminals 21 as their receiving terminals. In other words, to prevent a single transmitting terminal 21 from being assigned to multiple satellite receiving stations 11, the responsible transmitting terminals 21 are assigned to the multiple satellite receiving stations 11, and information about the assigned transmitting terminals 21 is supplied to the satellite receiving stations 11. Each satellite receiving station 11 receives signals from its assigned transmitting terminal 21 and supplies the received signals to the ground server 13.

[0116] In step S107, the ground server 13 receives IQ data from satellite receiving station 11-1 and IQ data from satellite receiving station 11-2. The ground server 13 performs predetermined processing on the received IQ data as needed.

[0117] This process, similar to the first process, allows for the determination of the optimal satellite receiving station 11 when multiple low-Earth orbit satellite receiving stations 11 receive transmission signals from ground terminals (transmitting terminals 21). By distributing the reception processing among multiple low-Earth orbit satellite receiving stations 11, the number of transmitting terminals 21 that can be processed by the entire system can be increased. A system with a wide communication range can be constructed with fewer satellite receiving stations 11. The processing load on each satellite receiving station 11 can be reduced, thereby lowering the power consumption of each satellite receiving station 11.

[0118] In the embodiment described above, the processing that was performed by the ground server 13 can also be performed by one of the multiple satellite receiving stations 11.

[0119] <Regarding Recording Media> The series of processes described above can be executed by hardware or by software. When the series of processes are executed by software, the programs that make up the software are installed on a computer. Here, a computer includes computers built into dedicated hardware, as well as general-purpose personal computers that can perform various functions by installing various programs.

[0120] Figure 12 is a block diagram showing an example of the hardware configuration of a computer that executes the series of processes described above by a program. In the computer, the CPU (Central Processing Unit) 2001, ROM (Read Only Memory) 2002, and RAM (Random Access Memory) 2003 are interconnected by a bus 2004. An input / output interface 2005 is further connected to the bus 2004. An input unit 2006, an output unit 2007, a storage unit 2008, a communication unit 2009, and a drive 2010 are connected to the input / output interface 2005.

[0121] The input unit 2006 consists of a keyboard, mouse, microphone, etc. The output unit 2007 consists of a display, speaker, etc. The storage unit 2008 consists of a hard disk, non-volatile memory, etc. The communication unit 2009 consists of a network interface, etc. The drive 2010 drives removable media 2011 such as a magnetic disk, optical disk, magneto-optical disk, or semiconductor memory.

[0122] In a computer configured as described above, the CPU 2001 loads, for example, a program stored in the memory unit 2008 into the RAM 2003 via the input / output interface 2005 and the bus 2004, and executes it, thereby performing the series of processes described above.

[0123] A program executed by a computer (CPU 2001) can be provided by recording it on removable media 2011, such as a packaged media. Furthermore, the program can be provided via wired or wireless transmission media, such as a local area network, the internet, or digital satellite broadcasting.

[0124] In a computer, a program can be installed in the storage unit 2008 via the input / output interface 2005 by inserting the removable media 2011 into the drive 2010. Alternatively, the program can be received by the communication unit 2009 via a wired or wireless transmission medium and installed in the storage unit 2008. Furthermore, the program can be pre-installed in the ROM 2002 or the storage unit 2008.

[0125] The programs executed by the computer may be programs that are processed chronologically in the order described herein, or they may be programs that are processed in parallel or at necessary times, such as when a call is made.

[0126] In this specification, "system" refers to an entire apparatus composed of multiple devices.

[0127] Furthermore, the effects described herein are merely illustrative and not limiting, and other effects may also occur.

[0128] Furthermore, the embodiments of this technology are not limited to those described above, and various modifications are possible without departing from the spirit of this technology.

[0129] Furthermore, this technology can also be configured as follows: (1) A receiving device comprising: an interference amount calculation unit that calculates the amount of interference that interferes with the desired wave to be received; an interference map that represents the distribution of the interference amount; a SINR calculation unit that acquires the location information of the receiving target terminal and calculates the SINR (Signal to Noise Ratio); and a receiving unit that receives a signal from the receiving target terminal when it is set to receive a signal from the receiving target terminal. (2) The receiving device according to (1) above, wherein the interference amount calculation unit calculates the interference amount using data obtained when the beam generated by digital beamforming is directed directly downwards. (3) The receiving device according to (1) or (2) above, wherein the interference map is divided into a plurality of blocks, and the interference amount calculated by any one of the plurality of receiving devices is described for each block. (4) The receiving device according to any one of (1) to (3) above, wherein the SINR calculation unit calculates the SINR for each beam generated by digital beamforming. (5) A receiving device according to any one of (1) to (4) above, wherein the maximum SINR, which is the largest value among the SINRs calculated by the SINR calculation unit, is associated with the receiving target terminal. (6) A receiving device according to (5) above, which is set to receive a signal from the receiving target terminal if the maximum SINR of the receiving target terminal is larger than that of other receiving devices. (7) A receiving device according to any one of (1) to (6) above, which is a satellite receiving station. (8) A receiving device according to any one of (1) to (7) above, wherein the receiving target terminal is an IoT (Internet of Things) terminal. (9) A receiving method in which a receiving device that receives a signal from a receiving target terminal calculates the amount of interference that interferes with the desired wave to be received, obtains an interference map representing the distribution of the amount of interference and the location information of the receiving target terminal, calculates the SINR (Signal to Noise Ratio), and receives a signal from the receiving target terminal if it is set to receive a signal from the receiving target terminal.(10) A data processing device comprising: an acquisition unit that acquires data obtained when the beam is pointed directly downward from a receiving device that receives a signal from a target terminal using a beam generated by digital beamforming; an interference amount calculation unit that calculates the amount of interference that interferes with the desired wave to be received using the data acquired by the acquisition unit; a generation unit that generates an interference map representing the distribution of the interference amount; a SINR calculation unit that calculates the SINR (Signal to Noise Ratio) for each beam generated by digital beamforming at a position on the interference map corresponding to the position where the target terminal is installed, and calculates the maximum SINR with the largest value; and a setting unit that sets the receiving device with the largest maximum SINR among a plurality of receiving devices associated with the target terminal as the receiving device that receives a signal from the target terminal. (11) The data processing device according to (10), wherein the interference map is a map divided into a plurality of blocks, and the data processing device generates the interference map by acquiring the amount of interference and position information relating to the position of the receiving device when the interference amount was calculated from the receiving device, and writing the acquired amount of interference to the block corresponding to the position information. (12) The receiving device is a data processing device according to (10) or (11) above, which is a satellite receiving station. (13) The receiving target terminal is a data processing device according to any one of (10) to (12) above, which is an IoT (Internet of Things) terminal.(14) A data processing device that receives and processes data from a receiving device that receives a signal from a target terminal using a beam generated by digital beamforming, the device obtains data from the receiving device obtained when the beam is pointed directly downward, calculates the amount of interference that interferes with the desired wave to be received using the obtained data, generates an interference map representing the distribution of the amount of interference, calculates the SINR (Signal to Noise Ratio) for each beam generated by digital beamforming at the position on the interference map corresponding to the position where the target terminal is installed, calculates the maximum SINR with the largest value, and sets the receiving device with the largest maximum SINR among a plurality of receiving devices associated with the target terminal as the receiving device that receives the signal from the target terminal.

[0130] 1 Data processing system, 11 Satellite receiving station, 13 Ground server, 21 Transmitting terminal, 23 Interference source, 31 Receiving antenna unit, 32 Antenna element, 33 Multiplier unit, 34 Adder unit, 40 Received signal generation unit, 101 Antenna, 102 Antenna, 103 Antenna, 104 GNSS receiving unit, 105 Ground server communication unit, 106 SINR calculation unit, 107 Analog receiving unit, 108 Digital signal decoding unit, 109 Beam control unit, 201 Antenna, 202 Antenna, 203 GNSS receiving unit, 204 Sensor, 205 Digital signal generation unit, 206 Analog transmission unit, 301 Interference map

Claims

1. A receiving device comprising: an interference amount calculation unit that calculates the amount of interference that interferes with the desired receiving wave; an interference map that represents the distribution of the interference amount; a SINR calculation unit that acquires the location information of the receiving terminal and calculates the SINR (Signal to Noise Ratio); and a receiving unit that receives a signal from the receiving terminal when it is set to receive a signal from the receiving terminal.

2. The receiving device according to claim 1, wherein the interference amount calculation unit calculates the interference amount using data obtained when the beam generated by digital beamforming is directed directly downwards.

3. The receiving device according to claim 1, wherein the interference map is divided into a plurality of blocks, and for each block, the amount of interference calculated by any one of the plurality of receiving devices is described.

4. The receiving device according to claim 1, wherein the SINR calculation unit calculates the SINR for each beam generated by digital beamforming.

5. The receiving device according to claim 1, wherein the maximum SINR, which has the largest value among the SINRs calculated by the SINR calculation unit, is associated with the receiving target terminal.

6. The receiving device according to claim 5, which is set to receive a signal from the receiving target terminal if the maximum SINR of the receiving target terminal is greater than that of other receiving devices.

7. The receiving device according to claim 1, which is a satellite receiving station.

8. The receiving device according to claim 1, wherein the receiving target terminal is an IoT (Internet of Things) terminal.

9. A receiving method in which a receiving device that receives signals from a target terminal calculates the amount of interference that interferes with the desired wave to be received, obtains an interference map representing the distribution of the amount of interference and the location information of the target terminal, calculates the SINR (Signal to Noise Ratio), and receives signals from the target terminal if it is set to receive signals from the target terminal.

10. A data processing device comprising: an acquisition unit that acquires data obtained when the beam generated by digital beamforming is pointed directly downwards from a receiving device that receives signals from a target terminal using a beam generated by digital beamforming; an interference amount calculation unit that calculates the amount of interference that interferes with the desired wave to be received using the data acquired by the acquisition unit; a generation unit that generates an interference map representing the distribution of the interference amount; a SINR calculation unit that calculates the SINR (Signal to Noise Ratio) for each beam generated by digital beamforming at the position on the interference map corresponding to the position where the target terminal is installed, and calculates the maximum SINR with the largest value; and a setting unit that sets the receiving device with the largest maximum SINR among a plurality of receiving devices associated with the target terminal as the receiving device that receives signals from the target terminal.

11. The data processing device according to claim 10, wherein the interference map is a map divided into a plurality of blocks, and the interference amount and position information relating to the position of the receiving device when the interference amount was calculated are obtained from the receiving device, and the interference map is generated by recording the obtained interference amount in the block corresponding to the position information.

12. The data processing device according to claim 10, wherein the receiving device is a satellite receiving station.

13. The data processing device according to claim 10, wherein the receiving terminal is an IoT (Internet of Things) terminal.

14. A data processing device that receives and processes data from a receiving device that receives signals from a target terminal using a beam generated by digital beamforming, the device obtains data from the receiving device obtained when the beam is pointed directly downward, calculates the amount of interference that interferes with the desired wave to be received using the obtained data, generates an interference map representing the distribution of the amount of interference, calculates the SINR (Signal to Noise Ratio) for each beam generated by digital beamforming at the position on the interference map corresponding to the position where the target terminal is installed, calculates the maximum SINR with the largest value, and sets the receiving device with the largest maximum SINR among a plurality of receiving devices associated with the target terminal as the receiving device that receives signals from the target terminal.

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