JP2011160072A - Signal processor and signal processing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a signal processor capable of receiving a stable signal by using a plurality of signal receiving means even though satellite prospect is under a bad condition. <P>SOLUTION: A plurality of signal receiving means are arranged in different directions, which observe the orbit of an artificial satellite and receive a signal including an orbit schedule and time of the artificial satellite. The signal processor includes: a receiving means for receiving the orbit of the artificial satellite observed by the receiving means and the received signal; an orbit schedule storing means for storing the orbit schedule of the artificial satellite in the signal received by the receiving means; and a signal selecting means for selecting one or more among signals received by the plurality of receiving means in accordance with the comparison of the orbit schedule of the artificial satellite stored in the orbit schedule storing means with the orbit of the artificial satellite received by the receiving means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a signal processing device and a signal processing program for processing a signal received from an artificial satellite.

2. Description of the Related Art Conventionally, a GPS system that receives a GPS (Global Positioning System) signal from an artificial satellite and obtains position information thereof is known. The GPS system can accurately obtain the three-dimensional position coordinates and time by receiving and decoding GPS signals from four or more artificial satellites.
One GPS receiving unit was mainly used, and it was placed on the top of a building where the number of satellites captured was the best, and managed so that the number of satellites captured was always 4 or more.
For this reason, there is no place for installing the satellite antenna, and it is expensive to install, and it is necessary to always manage the antenna so as not to be affected by the shielding or reflection of radio waves by surrounding buildings, mountains, plants and the like.
In addition, two or more GPS receiver units may be installed in preparation for a failure, but the above problem has not been solved.

  As a technology related to this, for example, Patent Document 1 discloses that a plurality of microstrip antennas provided in an automobile for the purpose of ensuring reception from a GPS satellite and accurately obtaining absolute position information of the automobile, A comparator having a plurality of intermediate frequency amplifiers and detectors corresponding to a microstrip antenna, an AD converter for AD converting a received signal from the detector, and having a selection identification function, and a received digital signal from the comparator It has been disclosed to have a decoder having a decoding function.

  Further, for example, Patent Document 2 has a problem of simplifying a configuration for antenna switching when receiving a satellite signal diversity and reducing a processing load, and can be connected to a plurality of antennas and one antenna. A radio signal receiving circuit for a radio signal and a satellite signal receiving circuit that can be connected to another antenna and that receives a satellite signal from a satellite, and a radio signal that is received by the radio signal receiving circuit are input, The signal processing means (one functional part of the control / processing circuit) that performs signal processing according to the input signal and the satellite signal received and processed by the satellite signal receiving circuit are input, and the signal processing is performed according to the input signal. The satellite signal processing means (the other functional part of the control / processing circuit) for connecting the satellite signal receiving circuit and the plurality of antennas according to the number of satellites captured by at least one antenna. It is disclosed that includes an antenna connection switching means for switching.

JP-A-5-14249 JP 2007-180883 A

Despite obtaining information about the satellite capture status, accuracy, etc. from the GPS receiver unit, they can be used for purposes other than the purpose of grasping the current operating status of the GPS receiver unit and whether it is a malfunction or not. could not.
The present invention has been made in the background of the background art as described above, and can stably receive a signal by using a plurality of signal receiving means even under a condition in which an artificial satellite is not well captured. An object of the present invention is to provide a signal processing apparatus and a signal processing program.

The gist of the present invention for achieving the object lies in the inventions of the following items.
[1] A plurality of receiving means for observing the orbit of the artificial satellite and receiving signals including the orbit schedule and time of the artificial satellite are arranged in different directions, and the orbit of the artificial satellite observed by the receiving means is received. Receiving means for receiving the received signal, orbit schedule storage means for storing the orbit schedule of the satellite in the signal received by the receiving means, and the orbit schedule of the satellite stored in the orbit schedule storage means and the receiving A signal processing device comprising signal selection means for selecting one or more of the signals received by the plurality of receiving means according to a comparison with the orbit of the artificial satellite received by the means.

  [2] The signal selecting means originally observes the artificial satellite among the orbits of the artificial satellites observed by the plurality of receiving means according to the orbit schedule of the artificial satellites stored in the orbit schedule storage means. The signal processing device according to [1], wherein one or more signals received by the receiving means to be selected are selected.

  [3] A plurality of receiving means for observing the orbit of the artificial satellite and receiving a signal including the orbit schedule and time of the artificial satellite are arranged in different directions, and the orbit of the artificial satellite observed by the receiving means is received. A receiving means for receiving the received signal, an orbit storage means for storing the orbit of the artificial satellite received by the receiving means, and the orbit of the artificial satellite based on the orbit of the artificial satellite stored in the orbit storage means. Signal selection means for learning and selecting one or more of the signals received by the plurality of receiving means in response to a comparison between the learning result and the orbit of the artificial satellite received by the receiving means; A signal processing apparatus.

  [4] The signal selection unit selects a signal according to information on the number of artificial satellites observed by the reception unit or information on the intensity of the signal observed by the reception unit. [3] The signal processing device according to any one of [3].

  [5] A plurality of receiving means for observing the orbit of the artificial satellite and receiving a signal including the orbit schedule and time of the artificial satellite are arranged in different directions, and the computer has an orbit of the artificial satellite observed by the receiving means. Receiving means for receiving the received signal; orbit schedule storage means for storing the orbit schedule of the satellite in the signal received by the receiving means; and the orbit schedule of the satellite stored in the orbit schedule storage means; Signal processing characterized by functioning as signal selection means for selecting one or more of the signals received by the plurality of receiving means according to comparison with the orbit of the artificial satellite received by the receiving means program.

  [6] A plurality of receiving means for observing the orbit of the artificial satellite and receiving a signal including the orbit schedule and time of the artificial satellite are arranged in different directions, and the computer has an orbit of the artificial satellite observed by the receiving means. Receiving means for receiving the received signal; orbit storage means for storing the orbit of the satellite received by the receiving means; and based on the orbit of the artificial satellite stored in the orbit storage means. As signal selection means for learning an orbit and selecting one or more of the signals received by the plurality of receiving means in accordance with a comparison between the learning result and the orbit of the artificial satellite received by the receiving means A signal processing program characterized by causing it to function.

  According to the signal processing device and the signal processing program of the present invention, it is possible to stably receive a signal by using a plurality of signal receiving means even under a condition where the visibility of the satellite is poor.

It is a conceptual module block diagram about the structural example of this Embodiment. It is a flowchart which shows the process example by this Embodiment. It is a flowchart which shows the process example by this Embodiment. It is a flowchart which shows the process example by this Embodiment. It is explanatory drawing about the example of signal processing in the case of one GPS antenna and a GPS signal processing module. It is explanatory drawing about the example of a signal processing in the case of a multiple GPS antenna and a GPS signal processing module. It is explanatory drawing which shows the example of the orbit of a satellite. It is explanatory drawing which shows the example which installed the GPS antenna and the GPS signal processing module in the building. It is explanatory drawing which shows the example of the orbit of the satellite which can be observed when a GPS antenna and a GPS signal processing module are installed in a building. It is explanatory drawing which shows the example which installed the GPS antenna and the GPS signal processing module in the building. It is explanatory drawing which shows the example of the orbit of the satellite which can be observed when a GPS antenna and a GPS signal processing module are installed in a building. It is explanatory drawing which shows the example which installed the two GPS antennas and the GPS signal processing module in the building. It is explanatory drawing which shows the example of the orbit of the satellite which can be observed when two GPS antennas and a GPS signal processing module are installed in a building. It is a block diagram which shows the hardware structural example of the computer which implement | achieves this Embodiment.

Hereinafter, an example of a preferred embodiment for realizing the present invention will be described with reference to the drawings.
FIG. 1 shows a conceptual module configuration diagram of a configuration example of the present embodiment.
The module generally refers to components such as software (computer program) and hardware that can be logically separated. Therefore, the module in the present embodiment indicates not only a module in a computer program but also a module in a hardware configuration. Therefore, the present embodiment also serves as an explanation of a computer program, a system, and a method. However, for the sake of explanation, the words “store”, “store”, and equivalents thereof are used. However, when the embodiment is a computer program, these words are stored in a storage device or stored in memory. It is the control to be stored in the device. Modules may correspond to functions one-to-one, but in mounting, one module may be configured by one program, or a plurality of modules may be configured by one program, and conversely, one module May be composed of a plurality of programs. The plurality of modules may be executed by one computer, or one module may be executed by a plurality of computers in a distributed or parallel environment. Note that one module may include other modules. Hereinafter, “connection” is used not only for physical connection but also for logical connection (data exchange, instruction, reference relationship between data, etc.).
In addition, the system or device is configured by connecting a plurality of computers, hardware, devices, and the like by communication means such as a network (including one-to-one correspondence communication connection), etc. The case where it implement | achieves by etc. is also included. “Apparatus” and “system” are used as synonymous terms. Of course, the “system” does not include a social “mechanism” (social system) that is an artificial arrangement.
In addition, when performing a plurality of processes in each module or in each module, the target information is read from the storage device for each process, and the processing result is written to the storage device after performing the processing. is there. Therefore, description of reading from the storage device before processing and writing to the storage device after processing may be omitted. Here, the storage device may include a hard disk, a RAM (Random Access Memory), an external storage medium, a storage device via a communication line, a register in a CPU (Central Processing Unit), and the like.

  The signal processing apparatus according to the present embodiment processes a signal received from an artificial satellite (hereinafter also simply referred to as a satellite), and includes a GPS signal receiving module 101, a GPS signal receiving module 102, and a GPS signal receiving module 103. , A GPS signal receiving module 104 is installed. As shown in the example of FIG. 1, the GPS signal collecting module 110 includes a GPS signal receiving module 112, a GPS signal selection module 114, a schedule storage module 116, an orbit storage module 118, A GPS signal output module 120 is included.

  The GPS signal receiving module 101, the GPS signal receiving module 102, the GPS signal receiving module 103, and the GPS signal receiving module 104 are installed in different directions, and are connected to the GPS signal receiving module 112 in the GPS signal collecting module 110. Yes. That is, the number of satellites that can be captured by a plurality of GPS antennas is increased. Moreover, since it installs in multiple numbers, it does not necessarily have to install in a place without an obstruction (for example, the rooftop of a building, etc.), You may install in the vicinity of the window of a building. The GPS signal receiving module 101 or the like observes the orbit of a satellite and receives a signal including the orbit schedule and time of the satellite. The received signal is called a so-called GPS signal, and includes a satellite orbit schedule, time, satellite identification code, satellite position at the time of transmission, and the like. In addition, the GPS signal receiving module 101 or the like observes the orbit of the satellite, and also observes the signal strength (for example, the captured state of the satellite, accuracy, etc.). Then, the received GPS signal and observation result are passed to the GPS signal receiving module 112 in the GPS signal collecting module 110. In the example shown in FIG. 1, there are four GPS signal receiving modules, but a plurality of modules may be used.

  The GPS signal receiving module 112 is connected to the GPS signal receiving module 101, the GPS signal receiving module 102, the GPS signal receiving module 103, the GPS signal receiving module 104, the GPS signal selection module 114, the schedule storage module 116, and the orbit storage module 118. Yes. The GPS signal received by the GPS signal receiving module 101 and the like and the observation result are received. The received GPS signal includes an orbit schedule and the like, and the orbit schedule in the GPS signal is stored in the schedule storage module 116 in association with the satellite identification code. In addition, the orbit information of the satellite in the observation result is stored in the orbit storage module 118. Further, the GPS signal and the observation result are passed to the GPS signal selection module 114.

The schedule storage module 116 is accessed from the GPS signal receiving module 112 and the GPS signal selection module 114. The satellite orbit schedule in the GPS signal received by the GPS signal receiving module 112 is stored. Then, the orbit schedule is passed by access from the GPS signal selection module 114.
The orbit storage module 118 is accessed from the GPS signal reception module 112 and the GPS signal selection module 114. The satellite orbit information received by the GPS signal receiving module 112 is stored. Then, the orbit information is passed by access from the GPS signal selection module 114.

  The GPS signal selection module 114 is connected to the GPS signal receiving module 112, the schedule storage module 116, the orbit storage module 118, and the GPS signal output module 120. One or more of the signals received by the GPS signal receiving module 101 or the like in response to a comparison between the satellite orbit schedule stored in the schedule storage module 116 and the satellite orbit received by the GPS signal receiving module 112. Select. That is, if the trajectory schedule and the actual trajectory are the same, the GPS signal received by the GPS signal receiving module that observed the trajectory is selected.

  Further, the GPS signal selection module 114 is a GPS that should originally observe the satellite among the orbits of the satellites observed by the GPS signal collection module 110 or the like according to the orbit schedule of the satellites stored in the schedule storage module 116. One or more signals received by the signal receiving module 101 or the like may be selected. That is, the GPS signal received by the GPS signal receiving module is selected according to the orbit schedule. For example, according to the orbit schedule, if the satellite is on the north side at that time, the GPS signal from the GPS signal receiving module facing the north side is selected.

  The GPS signal selection module 114 learns the satellite orbit based on the satellite orbit stored in the orbit storage module 118, and compares the learning result with the satellite orbit received by the GPS signal reception module 112. Depending on the comparison, one or more signals received by the GPS signal receiving module 101 or the like may be selected. In other words, since the orbit of the satellite has periodicity, the orbit that should be present is estimated based on the actually observed orbit, and the GPS signal from the GPS signal receiving module that faces the estimated direction is selected. To do.

The GPS signal selection module 114 selects a signal according to the number of artificial satellites observed by the GPS signal reception module 101 or the like or information on the intensity of the signal observed by the GPS signal reception module 101 or the like. Also good. For example, selecting a GPS signal from a GPS signal receiving module having four or more satellites that can be observed, and the signal strength being the strongest among the GPS signal receiving modules 101, 102, 103, 104 The GPS signal may be selected.
The processing of the GPS signal selection module 114 described above may be combined. For example, when the number of past satellites or the signal strength changes periodically, a GPS signal from the GPS signal receiving module may be selected in accordance with the periodicity.

  The GPS signal output module 120 is connected to the GPS signal selection module 114. The GPS signal selected by the GPS signal selection module 114 is output to an external device. For example, the output of the GPS signal output module 120 may be used for frequency or time accuracy correction in a radio base station that performs cooperative communication. In addition, since cooperative communication requires synchronization by a plurality of radio base stations, frequency or time accuracy correction is required.

FIG. 2 is a flowchart showing a processing example (processing for comparing the trajectory schedule with the actual trajectory and selecting a matching one) according to the present embodiment.
In step S202, the GPS signal receiving module 101 or the like receives a GPS signal.
In step S204, the schedule storage module 116 stores the orbit schedule of each satellite.
In step S206, the orbit storage module 118 stores the observation orbit of each satellite.
In step S208, the GPS signal selection module 114 retrieves the current orbit schedule.
In step S210, the GPS signal selection module 114 determines whether or not there is received data from a satellite that matches the orbit schedule. If there is, the process proceeds to step S212, otherwise the process ends (step S299). .
In step S212, the GPS signal selection module 114 selects the received data.
In step S214, the GPS signal output module 120 outputs received data.

FIG. 3 is a flowchart showing a processing example according to the present embodiment (processing for learning using a past trajectory, comparing the learning result with an actual trajectory, and selecting a matching one).
In step S302, the GPS signal receiving module 101 or the like receives a GPS signal.
In step S304, the orbit storage module 118 stores the observation orbit of each satellite.
In step S306, the GPS signal selection module 114 learns the orbit of each satellite. Since the cycle of how the satellites are seen takes one cycle in about two weeks, the orbit may be learned using this periodicity. The learning here may be learning using a model of a neural network, or a statistical method that takes an average of past trajectories (which may be a mode or the like) within a cycle time. It may be a process.
In step S308, it is determined whether or not there is received data from a satellite that matches the orbit learned by the GPS signal selection module 114. If there is, the process proceeds to step S310, and if not, the process ends (step S399). ).
In step S310, the GPS signal selection module 114 selects the received data.
In step S312, the GPS signal output module 120 outputs received data.

FIG. 4 is a flowchart showing a processing example (processing for selecting a GPS signal based on the number of captured satellites or the strength of the GPS signal) according to the present embodiment.
In step S402, the GPS signal receiving module 101 or the like receives a GPS signal.
In step S404, the GPS signal selection module 114 determines whether or not the number of satellites or the signal strength is greater than or equal to a threshold value. If the number is greater than or equal to the threshold value, the process proceeds to step S406, and otherwise the process ends (step S499). For example, four threshold values are compared with the number of satellites. Further, either one of the number of satellites and the signal strength may be compared, or both may be compared by logical sum. Further, instead of comparing with the threshold value, the GPS signal of the GPS signal receiving module having the largest number of captured satellites or the strongest signal strength may be selected.
In step S406, the GPS signal selection module 114 selects the received data.
In step S408, the GPS signal output module 120 outputs received data.

FIG. 5 is an explanatory diagram of a signal processing example in the case of one GPS antenna and a GPS signal processing module. This is to explain an example of using a general GPS signal processing module 520.
Generally, the GPS antenna 510 is installed in an environment (so-called ideal environment) where satellites can be easily captured, such as where there is no shielding such as the roof of a building and where there are no large buildings that reflect radio waves nearby. The For this reason, incidental facilities such as lightning rods are often required.
The GPS signal processing module 520 receives signals from four or more satellites (satellites 500A, 500B, 500C, and 500D in FIG. 5), and receives satellite A (GPS data) 531, satellite B (GPS data) 532, and satellites. C (GPS data) 533 and satellite D (GPS data) 534 are output. Using these, the four unknowns (X, Y, Z) and time (T) are analyzed.

FIG. 6 is an explanatory diagram of a signal processing example in the case of a plurality of GPS antennas and a GPS signal processing module.
The example shown in FIG. 6A is for the case where one GPS antenna and GPS signal processing module illustrated in FIG. 5 are installed, but there are buildings 699A and 699B nearby, so that the GPS antenna 610 can be captured. The only satellites are satellite 600A and satellite 600B. Therefore, the GPS signal processing module 620 outputs only the satellite A (GPS data) 631 and the satellite B (GPS data) 632. That is, it is impossible to analyze four unknowns with only two GPS signals.

  The example shown in FIG. 6B is for the case where two GPS antennas and a GPS signal processing module are installed. The GPS antenna 640 is installed at the same position as that in FIG. Is installed on the opposite side of the GPS antenna 640 around the building 699A. There are still two satellites that the GPS antenna 640 can capture, but there are four satellites that the GPS antenna 670 can capture. Therefore, the GPS signal processing module 650 outputs the satellite A (GPS data) 661 and the satellite B (GPS data) 662, and the GPS signal processing module 680 includes the satellite E (GPS data) 691, the satellite F (GPS data) 692, and the satellite. G (GPS data) 693 and satellite H (GPS data) 694 are output. In this embodiment, the GPS signal received from the GPS signal processing module 680 is finally output using the number of satellites. As a result, four or more GPS signals are used to analyze the four unknowns, coordinates (X, Y, Z) and time (T).

  The example shown in FIG. 6C is the same installation as the example of FIG. 6B, but the satellites that can be captured by the GPS antenna 640 increase to four over time, and the GPS antenna 670 The number of satellites that can be captured has decreased to two. Therefore, the GPS signal processing module 650 outputs the satellite A (GPS data) 661, the satellite B (GPS data) 662, the satellite C (GPS data) 663, and the satellite D (GPS data) 664, and the GPS signal processing module 680 is a satellite. E (GPS data) 691 and satellite F (GPS data) 692 are output. This embodiment finally outputs the GPS signal received from the GPS signal processing module 650 this time using the number of satellites. As a result, four or more GPS signals are used to analyze the four unknowns, coordinates (X, Y, Z) and time (T). That is, the satellite can be captured stably.

  FIG. 7 is an explanatory diagram illustrating an example of a satellite orbit. This is a satellite orbit generated based on satellite orbit information observed by the GPS signal receiving module 101 or the like, and is displayed in a circle as if the celestial sphere was crushed. The upper end is the north horizon, the lower end is the south horizon, the left end is the west horizon, the right end is the east horizon, and the center is the zenith (directly above). The number is an identification number of the satellite, and the density of the locus indicates the signal intensity. This data. It is output by the GPS signal processing module 520 installed in an ideal environment as shown in the example of FIG.

FIG. 8 is an explanatory diagram showing an example in which a GPS antenna and a GPS signal processing module are installed in a building. A case where a GPS antenna and a GPS signal processing module 820 are installed at a location facing the window 810 in the southeast of the building 800 is shown.
FIG. 9 is an explanatory diagram showing examples of satellite orbits that can be observed when a GPS antenna and a GPS signal processing module are installed in a building. That is, the orbit of the satellite observed by the GPS antenna and the GPS signal processing module 820 shown in the example of FIG. 8 is shown, and the northwest region 910 compared with FIG. This is a region where the signal strength is reduced.
FIG. 10 is an explanatory diagram showing an example in which a GPS antenna and a GPS signal processing module are installed in a building. A case where a GPS antenna 840 is installed at a location facing the window 830 in the northeast of the building 800 is shown.
FIG. 11 is an explanatory diagram showing an example of an orbit of a satellite that can be observed when a GPS antenna and a GPS signal processing module are installed in a building. That is, the orbit of the satellite observed by the GPS antenna and the GPS signal processing module 840 shown in the example of FIG. 10 is shown, and the region 1100 in the southwest compared with FIG. This is a region where the signal strength is reduced.

FIG. 12 is an explanatory diagram showing an example in which two GPS antennas and a GPS signal processing module are installed in a building. In other words, the examples shown in FIGS. 8 and 10 are combined, and the GPS antenna and the GPS signal processing modules 820 and 840 are installed on the southeast and northeast windows. Then, the GPS signal collection module 110 selects any GPS signal.
FIG. 13 is an explanatory diagram showing an example of an orbit of a satellite that can be observed when two GPS antennas and a GPS signal processing module are installed in a building. An example of the orbit of a satellite that can be observed when a GPS antenna and a GPS signal processing module are installed as in the example of FIG. By selecting the GPS signal from the GPS antenna and GPS signal processing module 820 and the GPS antenna and GPS signal processing module 840, the region where the satellite cannot be captured or the signal strength is reduced is the region 910 or the region 1100.

  Note that the hardware configuration of the computer on which the program according to the present embodiment is executed is a general computer as shown in FIG. 14, and more specifically, many processes other than the processing according to the present embodiment. It is a computer that can be a server that can execute the above. A CPU 1410 for executing programs such as the GPS signal receiving module 112, the GPS signal selection module 114, and the GPS signal output module 120, a RAM 1430 for storing the programs and data, a program for starting the computer, and the like are stored. ROM 1420, HD 1440 as an auxiliary storage device, UI / F 1450 that serves as an interface with the operator by inputting data from a keyboard, mouse, etc. by an operator's operation or outputting data to a CRT, liquid crystal display, etc., CD- A removable media reader / writer 1460 for reading and writing to removable media such as R, a communication line I / F 1470 for connecting to a communication network, and a bus 14 for connecting them to exchange data It is constituted by 0. A plurality of these computers may be connected to each other via a network.

In the present embodiment, the operation as a double system for failure may be performed. In other words, the GPS signal receiving module 101 is normally used, and when a signal indicating failure is received from the GPS signal receiving module 101, the GPS signal received by the other GPS signal receiving module 102 or the like is used. You may do it.
In the description of the above-described embodiment, a GPS antenna and a GPS signal processing module are integrated as the GPS signal receiving module 101 or the like (that is, the GPS signal collecting module 110 is not included in the GPS signal processing module). Although described as a premise, the GPS signal collection module 110 may be incorporated in the GPS signal processing module. That is, a plurality of GPS antennas may be connected to the GPS signal processing module, and a DSP (Digital Signal Processor) in the GPS signal processing module may have the function of the GPS signal collection module 110. In that case, instead of selecting the signal from the GPS signal processing module, the GPS signal received by the GPS antenna is selected.

Moreover, although the case where it installed in the position which fixed the GPS antenna was demonstrated, this embodiment may be implement | achieved by arrange | positioning several GPS antennas (for example, front and rear, right and left of a motor vehicle) to moving objects, such as a motor vehicle. . For example, a stable GPS signal can be received even when traveling in a position where the satellite's line of sight is poor, such as a tunnel or a shadow of a building.
In Japan, it is effective because there are almost no cases where you can see the whole sky without a shield.
Also, in regions with high latitudes (South Pole, North Pole) and the like, the direction of the satellite is fixed, so it is more effective when installed in a vehicle that moves there.

The program described above may be provided by being stored in a recording medium, or the program may be provided by communication means. In that case, for example, the above-described program may be regarded as an invention of a “computer-readable recording medium recording the program”.
The “computer-readable recording medium on which a program is recorded” refers to a computer-readable recording medium on which a program is recorded, which is used for program installation, execution, program distribution, and the like.
The recording medium is, for example, a digital versatile disc (DVD), which is a standard established by the DVD Forum, such as “DVD-R, DVD-RW, DVD-RAM,” and DVD + RW. Standard “DVD + R, DVD + RW, etc.”, compact disc (CD), read-only memory (CD-ROM), CD recordable (CD-R), CD rewritable (CD-RW), Blu-ray disc ( Blu-ray Disc (registered trademark), magneto-optical disk (MO), flexible disk (FD), magnetic tape, hard disk, read-only memory (ROM), electrically erasable and rewritable read-only memory (EEPROM), flash Includes memory, random access memory (RAM), etc. .
The program or a part of the program may be recorded on the recording medium for storage or distribution. Also, by communication, for example, a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), a wired network used for the Internet, an intranet, an extranet, etc., or wireless communication It may be transmitted using a transmission medium such as a network or a combination of these, or may be carried on a carrier wave.
Furthermore, the program may be a part of another program, or may be recorded on a recording medium together with a separate program. Moreover, it may be divided and recorded on a plurality of recording media. Further, it may be recorded in any manner as long as it can be restored, such as compression or encryption.

DESCRIPTION OF SYMBOLS 101 ... GPS signal receiving module 102 ... GPS signal receiving module 103 ... GPS signal receiving module 104 ... GPS signal receiving module 110 ... GPS signal collecting module 112 ... GPS signal receiving module 114 ... GPS signal selection module 116 ... Schedule storage module 118 ... Orbit Storage module 120 ... GPS signal output module

Claims (6)

A plurality of receiving means for observing the orbit of the artificial satellite and receiving a signal including the orbit schedule and time of the artificial satellite are arranged in different directions,
Receiving means for receiving the orbit of the satellite observed by the receiving means and the received signal;
Orbit schedule storage means for storing the orbit schedule of the satellite in the signal received by the receiving means;
One or more of the signals received by the plurality of receiving means in response to a comparison between the orbit schedule of the satellite stored in the orbit schedule storage means and the orbit of the artificial satellite received by the receiving means. A signal processing device comprising signal selection means for selecting The signal selection means is a receiver which should originally observe the artificial satellite among the orbits of the artificial satellites observed by the plurality of receiving means according to the orbit schedule of the artificial satellites stored in the orbit schedule storage means. The signal processing apparatus according to claim 1, wherein one or more of the signals received by the means are selected. A plurality of receiving means for observing the orbit of the artificial satellite and receiving a signal including the orbit schedule and time of the artificial satellite are arranged in different directions,
Receiving means for receiving the orbit of the satellite observed by the receiving means and the received signal;
Orbit storage means for storing the orbit of the artificial satellite received by the receiving means;
Based on the orbit of the artificial satellite stored in the orbit storage means, the orbit of the artificial satellite is learned, and according to the comparison between the learning result and the orbit of the artificial satellite received by the receiving means A signal processing device comprising: a signal selecting unit that selects one or more of the signals received by the receiving unit. The signal selection unit selects a signal according to information on the number of artificial satellites observed by the reception unit or information on the intensity of the signal observed by the reception unit. The signal processing device according to claim 1. A plurality of receiving means for observing the orbit of the artificial satellite and receiving a signal including the orbit schedule and time of the artificial satellite are arranged in different directions,
Receiving means for receiving the orbit of the satellite observed by the receiving means and the received signal;
Orbit schedule storage means for storing the orbit schedule of the satellite in the signal received by the receiving means;
One or more of the signals received by the plurality of receiving means in response to a comparison between the orbit schedule of the satellite stored in the orbit schedule storage means and the orbit of the artificial satellite received by the receiving means. A signal processing program that functions as a signal selection means for selecting a signal. A plurality of receiving means for observing the orbit of the artificial satellite and receiving a signal including the orbit schedule and time of the artificial satellite are arranged in different directions,
Receiving means for receiving the orbit of the satellite observed by the receiving means and the received signal;
Orbit storage means for storing the orbit of the artificial satellite received by the receiving means;
Based on the orbit of the artificial satellite stored in the orbit storage means, the orbit of the artificial satellite is learned, and according to the comparison between the learning result and the orbit of the artificial satellite received by the receiving means A signal processing program that functions as signal selecting means for selecting one or more signals received by the receiving means.

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