KR101752677B1 - Device for automatically tracking a broadcast satellite using a Global Navigation Satellite System(GNSS) and method thereof - Google Patents

Device for automatically tracking a broadcast satellite using a Global Navigation Satellite System(GNSS) and method thereof Download PDF

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KR101752677B1
KR101752677B1 KR1020150181644A KR20150181644A KR101752677B1 KR 101752677 B1 KR101752677 B1 KR 101752677B1 KR 1020150181644 A KR1020150181644 A KR 1020150181644A KR 20150181644 A KR20150181644 A KR 20150181644A KR 101752677 B1 KR101752677 B1 KR 101752677B1
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South Korea
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satellite
broadcasting
moving object
broadcast
antenna
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KR1020150181644A
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Korean (ko)
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KR20170073118A (en
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박지호
김남혁
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재단법인대구경북과학기술원
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/14—Systems for determining direction or deviation from predetermined direction
    • G01S3/38—Systems for determining direction or deviation from predetermined direction using adjustment of real or effective orientation of directivity characteristic of an antenna or an antenna system to give a desired condition of signal derived from that antenna or antenna system, e.g. to give a maximum or minimum signal
    • G01S3/42—Systems for determining direction or deviation from predetermined direction using adjustment of real or effective orientation of directivity characteristic of an antenna or an antenna system to give a desired condition of signal derived from that antenna or antenna system, e.g. to give a maximum or minimum signal the desired condition being maintained automatically
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/14—Receivers specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

The present invention relates to an automatic broadcasting satellite tracking apparatus and a method for operating the same, and more particularly, to an automatic broadcasting satellite tracking apparatus using a satellite navigation system, A satellite positioning receiver for determining a current position of the moving object based on the current position of the moving object using the fixed position coordinates of the broadcasting satellite with respect to the channel inputted to the satellite broadcasting receiver of the moving object and the current position coordinates of the moving object, And an antenna driving unit for adjusting the direction of the satellite broadcasting antenna provided on the moving object according to the position of the broadcasting satellite.

Description

TECHNICAL FIELD [0001] The present invention relates to an automatic broadcast satellite tracking apparatus using a satellite navigation system,

The present invention relates to a broadcasting satellite tracking technology, and more particularly, to an automatic broadcasting satellite tracking device using a GNSS and an operation method thereof.

Today, with the development of industrialization, people's leisure culture is also developing rapidly. Camping car, caravan, leisure car, food truck etc. have been widely used as camping culture has spread rapidly in recent years. With the rapid growth of such leisure vehicles, the demand for satellite broadcasting usage is also increasing. Here, a broadcasting satellite (BS) refers to a TV or radio broadcast using a geostationary satellite located above 36,000 km above the ground.

Satellite broadcasting (BS) receives radio wave directly from space satellite, so there is no interference due to the terrain, so the picture quality is clear and various channels related to politics, economy, sports, movie, music can be watched around the world. For example, satellite broadcasts include KBS broadcasts from the Mugunghwa 3 satellite, and SBS and MBC broadcasts from the Mugunghwa 5 satellite. In addition, the satellite broadcasting (BS) can watch various programs broadcasted in a high-definition HI-FI sound 24 hours in stereo equivalent to a CD. Such satellite broadcasting (BS) is also referred to as Direct To Home (DTH) or Direct Broadcasting System (DBS) in the sense that it directly broadcasts to home without going through a repeater.

Since satellite broadcasting (BS) transmits radio waves in the sky, it is possible to receive satellite broadcasting (BS) of other countries in neighboring countries because the radio wave arrival area is wide, and it is possible to provide a clear image even in a non-radio station area. In addition, since satellite broadcasting is used as a relay medium, there is an advantage that it can broadcast all over the country in an emergency even without suffering natural disaster or war.

Current satellite broadcasting (BS) is mainly used for moving vehicles such as moving vehicles and ships. For example, the satellite broadcasting (BS) receiving environment in the moving means can be implemented in a form of receiving broadcasting in a state of being mounted on a vehicle such as a vehicle, a train, a ship, and the like. In this case, the flat-type phased array antenna below the dome-shaped structure is used so that there is no air resistance, and a satellite broadcasting system (BS) is used by using the satellite tracking system to receive the satellite broadcasting ).

Alternatively, the reception environment of the satellite broadcasting (BS) in the moving dwelling can be realized by receiving the satellite broadcasting (BS) in a mobile type residence such as a camping car or a caravan. In this case, when the residence to stay is determined, the satellite broadcast (BS) can be viewed by adjusting the antenna in the satellite direction in which the parabolic antenna is to be viewed according to the designated location. At this time, a desired satellite signal is input to the satellite broadcast receiver and blind scan is performed to find the signal.

However, as a conventional method of identifying and tracking a satellite broadcast (BS), a method of checking whether a satellite broadcast receiving antenna is aiming at a satellite to be tracked through satellite downlink frequency spectrum analysis is used. However, this method is troublesome to identify and analyze the unique downlink frequency spectrum, and is difficult to install and operate.

In addition, an active satellite antenna system that automatically tracks satellites can track only a single satellite and can not receive multiple satellite broadcasts (BS) at the same time, so the broadcast receiving channel is very limited.

An object of the present invention is to provide an apparatus and method for tracking an automatic broadcasting satellite using a satellite navigation system for accurately determining a direction and a position of a broadcasting satellite based on a moving object by confirming a position of a moving object by using a satellite navigation system.

According to an aspect of the present invention, there is provided an automatic broadcasting satellite tracking system using a satellite navigation system, including: a moving object position determining unit for determining a current position coordinate of a moving object using a GNSS; A broadcasting satellite tracking unit for tracking the position of the broadcasting satellite based on the current position of the moving object using the fixed position coordinates of the broadcasting satellite with respect to the channel input to the satellite broadcasting receiver and the current position coordinates of the moving object, And an antenna driving unit for adjusting a direction of a satellite broadcasting antenna provided on the moving object according to the position of the broadcasting satellite.

The broadcast satellite tracking unit acquires the fixed position coordinates of the broadcast satellite from which the satellite broadcast signal of the input channel is transmitted, from the memory where the fixed position coordinates of the broadcast satellite are stored.

The broadcasting satellite tracking unit calculates the azimuth and azimuth of the broadcasting satellite based on the position of the moving object using the current position coordinates of the moving object and the fixed position coordinates of the broadcasting satellite.

The broadcasting satellite tracking unit obtains a line-of-sight from the current position of the moving object to the position of the broadcasting satellite using the current position coordinates of the moving object and the fixed position coordinates of the broadcasting satellite, The azimuth angle and the altitude angle are calculated using a unit view vector which is a unit vector of the azimuth angle.

The antenna driving unit adjusts the direction of the satellite broadcasting antenna according to the azimuth angle and the altitude angle so that the satellite broadcasting antenna mounted at a predetermined position of the moving body is directed to the broadcasting satellite.

The antenna driving unit precisely adjusts the direction of the satellite broadcasting antenna in a direction in which the satellite broadcasting signal having the strongest intensity among the satellite broadcasting signal intensities received within a predetermined angle range based on the azimuth angle and the altitude angle is received do.

The automatic broadcasting satellite tracking apparatus using the satellite navigation system further includes a visible satellite monitoring unit for monitoring a GNSS signal received through the antenna for the satellite navigation system and monitoring a predetermined number or more of visible satellites, And the position coordinates of the moving object are determined using the GNSS signals received from the predetermined number or more of the visible satellites.

The broadcast satellite tracking unit may monitor a satellite broadcast signal for the input channel through a blind scan operation if the visible satellite of the predetermined number or more is not monitored while the visible satellite monitoring operation of the visible satellite monitoring unit is operated a predetermined number of times or more, .

The broadcasting satellite tracking unit compares the input channel information with the channel information included in the satellite broadcasting signal and confirms whether the satellite broadcasting signal for the input channel is received.

According to another aspect of the present invention, there is provided an automatic broadcasting satellite tracking method using a satellite navigation system, including the steps of: determining a current position coordinate of a moving object using a GNSS; Tracking the position of the broadcasting satellite based on the current position of the moving object using the fixed position coordinates of the broadcasting satellite with respect to the channel input to the broadcasting receiver and the current position coordinates of the moving object, And adjusting the direction of the satellite broadcasting antenna provided on the mobile body according to the direction of the satellite broadcasting antenna.

The tracking step acquires the fixed position coordinates of the broadcasting satellite transmitting the satellite broadcasting signal of the input channel from the memory storing the fixed position coordinates of the broadcasting satellite per broadcasting channel.

The tracking step calculates an azimuth and elevation of the broadcasting satellite based on the position of the moving object using the current position coordinates of the moving object and the fixed position coordinates of the broadcasting satellite.

Wherein the tracking step obtains a line-of-sight from a current position of the moving object to a position of the broadcasting satellite using the current position coordinates of the moving object and the fixed position coordinates of the broadcasting satellite, The azimuth angle and the altitude angle are calculated using a unit view vector which is a unit vector of the azimuth angle.

The adjusting step adjusts the direction of the satellite antenna according to the azimuth angle and the altitude angle so that the antenna for satellite broadcasting mounted at a predetermined position of the moving body is directed to the broadcasting satellite.

Wherein the adjusting step adjusts the direction of the satellite broadcasting antenna in a direction in which the satellite broadcasting signal having the strongest intensity among the intensity of the satellite broadcasting signal received within a predetermined angle range based on the azimuth angle and the altitude angle is received, .

The automatic broadcasting satellite tracking method using the satellite navigation system further includes monitoring GNSS signals received through the antenna for the satellite navigation system and monitoring a predetermined number or more of visible satellites, And determines the position coordinates of the moving object by using the GNSS signals received from the predetermined number or more of the visible satellites.

The method of claim 1, wherein, if the visible satellite is not monitored for a predetermined number of times while the visible satellite monitoring operation of the visible satellite monitoring unit is operated for a predetermined number of times or more, the satellite broadcast signal for the input channel is blind- .

The tracking step compares the input channel information with the channel information included in the satellite broadcasting signal to confirm whether the satellite broadcasting signal for the input channel is received.

According to the embodiment of the present invention, the azimuth angle and altitude angle of the broadcasting satellite are calculated on the basis of the moving object using the coordinates of the current position of the moving object and the unique position coordinates of the broadcasting satellite for the channel to be viewed, So that the satellite broadcast can be automatically tracked even when the mobile body is stationary or moving, and there is no difficulty in operation, installation, and signal analysis.

1 is a block diagram of an automatic broadcasting satellite tracking device using a satellite navigation system according to an embodiment of the present invention;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a navigation system,
3 is a reference diagram for explaining a process of calculating an altitude angle and an azimuth angle between a moving object and a broadcast satellite according to an embodiment of the present invention.
4 is a flowchart of an automatic broadcasting satellite tracking method using a satellite navigation system according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. And is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined by the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that " comprises, " or "comprising," as used herein, means the presence or absence of one or more other components, steps, operations, and / Do not exclude the addition.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are given to the same or similar components, and in the following description of the present invention, Detailed explanations of the detailed description will be omitted when the gist of the present invention can be obscured.

1 is a block diagram of an automatic broadcasting satellite tracking system using a satellite navigation system according to an embodiment of the present invention.

1, an automatic broadcasting satellite tracking apparatus 100 using a satellite navigation system according to an embodiment of the present invention includes a visible satellite monitoring unit 110, a moving object positioning unit 120, a broadcasting satellite tracking unit 130 and an antenna driver 140.

The visible satellite monitoring unit 110 monitors the visible satellites at regular intervals and confirms whether the number of the monitored visible satellites is equal to or greater than a predetermined number. Here, the visible satellite refers to a satellite for a Global Navigation Satellite System (GNSS), and the visible satellite monitoring unit 110 confirms a GNSS signal (satellite navigation signal) received from the GNSS satellite through the antenna for GNSS Thus, the number of visible satellites can be confirmed. At this time, the predetermined number may be changed by the operator or the developer in advance.

In order to confirm the accurate positional coordinates of the moving object, it is preferable to use the GNSS signal received from at least four visible satellites as shown in FIG. 2. Therefore, in the embodiment of the present invention, It is assumed that the number of visible satellites is four or more.

If the number of monitored visible satellites is less than a predetermined number (four), the visible satellite monitoring unit 110 repeats the operation of monitoring the visible satellites. At this time, if the operation of monitoring the visible satellite is repeated infinitely, it takes more time than the blind scan and the user may judge as an error. Accordingly, the visible satellite monitoring unit 110 checks whether a predetermined number (four or more) of visible satellites are monitored while the operation of monitoring the visible satellites is repeated a predetermined number of times or less.

When a predetermined number or more of visible satellites are monitored by the visible satellite monitoring unit 110, the moving object position determination unit 120 determines a position of a moving object to receive a broadcasting satellite (BS). At this time, the moving object positioning unit 120 can determine the current position coordinates (X, Y, Z) of the moving object (particularly, the antenna of the moving object) using the GNSS signal received from the visible satellite through the antenna.

Specifically, as shown in FIG. 2, the moving object position determination unit 120 uses the time information included in the GNSS signals received from the plurality of visible satellites and the time information of the GNSS signals received, (X, Y, Z) of the moving object can be determined by creating virtual spheres having radiuses of each of the obtained distances. The technique of obtaining the coordinates of the moving object using the GNSS is a well-known technique, and a detailed description of the operation will be omitted.

The broadcasting satellite tracking unit 130 tracks the precise direction and position of the broadcasting satellite based on the moving object using the position coordinates of the broadcasting satellite and the current position coordinates of the moving object. Here, the broadcast satellite may be a satellite for transmitting a broadcast desired to be viewed by the viewer of the moving object.

When a broadcast channel to be viewed is selected by the viewer of the moving object, the broadcast satellite tracking unit 130 tracks the precise direction and position of the broadcast satellite transmitting the satellite broadcast signal of the selected broadcast channel. At this time, since the broadcasting satellite is a satellite fixed on the equatorial line, the position coordinates do not change. According to an embodiment of the present invention, fixed position coordinates (Pn (Xn, Yn, Zn)) (where n is the number of stored broadcast satellites and is a natural number of 1 or more) And may be stored in a storage unit (not shown).

In order to track the precise direction and position of the broadcast satellite on the basis of the moving object, the broadcast satellite tracking unit 130 first acquires the fixed position coordinates of the broadcast satellite transmitting the satellite broadcast signal of the channel selected by the user from the storage unit. At this time, the broadcasting satellite tracking unit 130 can receive the channel information selected by the user from the satellite broadcasting receiver provided at a predetermined position of the moving object.

The broadcast satellite tracking unit 130 uses the fixed position coordinates of the obtained broadcast satellite and the current position coordinates of the moving object determined by the moving object positioning unit 120 to calculate a line-of-sight -Sight.

For example, the gaze vector can be obtained by subtracting the fixed position coordinates P (X, Y, Z) of the broadcasting satellite from the current position coordinates O (X, Y, Z) of the moving object with reference to FIG. At this time, dividing the line-of-sight vector by the size of the line-of-sight vector,

Figure 112015124368767-pat00001
), And the formula for this may be as shown in Equation (1).

Figure 112015124368767-pat00002

Where r sat is the fixed position coordinate vector of the broadcasting satellite and r rcv is the current position coordinate vector of the moving object.

The broadcast satellite tracking unit 130 receives the current position coordinates of the moving object, the position coordinates of the broadcast satellite,

Figure 112015124368767-pat00003
The azimuth and altitude of the broadcasting satellite can be obtained based on the moving object. At this time, the broadcasting satellite tracking unit 130 can obtain the azimuth angle A and the altitude angle E using Equations 2 and 3. [

Figure 112015124368767-pat00004

Figure 112015124368767-pat00005

here,

Figure 112015124368767-pat00006
Is a unit line-of-sight vector on the X-axis from the moving object to the broadcasting satellite,
Figure 112015124368767-pat00007
Is a unit line-of-sight vector on the Y axis from the moving object to the broadcasting satellite,
Figure 112015124368767-pat00008
Is a unit gaze vector on the Z axis from the moving object to the broadcasting satellite.

The broadcasting satellite tracking unit 130 tracks the precise direction and position of the broadcasting satellite using the current position coordinates of the moving object, the position coordinates of the broadcasting satellite, and the azimuth angle A and the altitude angle E of the broadcasting satellite based on the moving object .

On the other hand, when the visible satellite monitoring unit 110 monitors the visible satellite for a predetermined number of repetitions or more and repeats the observation for less than a predetermined number, it is determined that the environment is poor, Unit 130 performs a blind scan operation on the broadcast satellite.

Here, the blind scan is a technique for searching for a satellite signal (frequency) for a channel input to a satellite broadcast receiver, confirming a desired broadcast satellite or frequency, and receiving a satellite broadcast signal from a desired broadcast satellite. Since the blind scan technique is well known in the satellite broadcast technology, a detailed description of the operation will be omitted.

In addition, the broadcasting satellite tracking unit 130 analyzes the satellite broadcasting signal received through the antenna for satellite broadcasting, and confirms whether the satellite is a broadcasting satellite for broadcasting the channel selected by the user. The broadcast satellite tracking unit 130 compares the channel information included in the satellite broadcast signal received from the broadcast satellite with the broadcast channel information selected by the mobile station so as to confirm whether the antenna is oriented to the broadcast satellite to be viewed on the mobile.

If the channel information of the selected broadcast channel information and the channel information of the received satellite broadcast signal do not coincide with each other, the mobile unit position determination unit reaffirms the position of the mobile unit.

In consideration of the direction and the position of the broadcast satellite tracked by the broadcast satellite tracking unit 130, the antenna driving unit 140 controls the direction of the antenna so that the satellite broadcast antenna, . For this purpose, the antenna driving unit 140 may include a motor for adjusting the angles and azimuth angles of the antenna.

Also, the antenna driving unit 140 precisely adjusts the direction of the antenna while measuring the intensity of the satellite broadcast signal received through the antenna from the broadcasting satellite. For example, the antenna driving unit 140 adjusts the direction of the satellite broadcasting antenna within a predetermined angle range based on the azimuth and altitude angles calculated by the broadcasting satellite tracking unit 130, and receives the satellite broadcasting signals. Here, the predetermined angle range can be set and changed in advance by the operator, the developer, and the like. The predetermined angle (first predetermined angle) and the predetermined angle (second predetermined angle) may be the same or different from each other with respect to the altitude angle based on the azimuth angle.

The antenna driving unit 140 can precisely adjust the direction of the satellite broadcasting antenna in a direction in which signals of the highest intensity among the plurality of signals received within a predetermined angle range are received.

If the broadcasting satellite tracking unit 130 tracks the broadcasting satellite through the blind scan, the antenna driving unit 140 may adjust the direction of the antenna while measuring the intensity of the satellite broadcasting signal received from the broadcasting satellite.

Finally, when a satellite broadcast signal is received in the direction of a broadcast satellite of a channel the user wishes to view, the received satellite broadcast signal can be transmitted to a satellite broadcast receiver through an LNB (Low Noise Block Downconverter) The satellite broadcast signal can be outputted through the monitor.

As described above, according to the embodiment of the present invention, the azimuth angle and elevation angle of the broadcasting satellite are calculated on the basis of the current position coordinates of the moving object and the unique position coordinates of the broadcasting satellite with respect to the channel to be viewed, By driving the antenna to be oriented at an altitude angle, the satellite broadcast can be automatically tracked even when the mobile body is stationary or moving, and there is no difficulty in operation, installation and signal analysis.

4 is a flowchart of an automatic satellite identification and estimation method using a satellite navigation system according to an embodiment of the present invention.

Hereinafter, unless otherwise noted, it is assumed to be performed in the automatic broadcasting satellite tracking apparatus 100 using the satellite navigation system according to the embodiment of the present invention.

First, the automatic broadcasting satellite tracking device 100 monitors the visible satellite (S401). Herein, visible satellites are satellites for a Global Navigation Satellite System (GNSS), and the automatic broadcast satellite tracking device 100 receives GNSS signals (satellite signals) received from GNSS satellites via an antenna for GNSS Navigation signals) to monitor visible satellites.

At this time, the automatic broadcasting satellite tracking device 100 determines whether a predetermined number or more of visible satellites are monitored during repeating the monitoring operation for a predetermined number of repetitions or less (S402) (S403). Here, the predetermined number of repetitions and the predetermined number may be described and changed in advance by the operator or the developer. Specifically, the automatic broadcasting satellite tracking device 100 monitors the visible satellites at regular intervals and determines whether the number of the monitored visible satellites is equal to or greater than a predetermined number. Since it is desirable to use the GNSS signal received from at least four visible satellites, as shown in Figure 2, in order to ascertain the exact current location coordinates of the moving object, the automatic broadcasting satellite tracking device 100 in the embodiment of the present invention It is assumed that the number of monitored visible satellites is four or more.

If the number of the monitored visible satellites is less than the predetermined number (four), the automatic broadcasting satellite tracking device 100 repeats the operation of monitoring the visible satellites. At this time, if the operation of monitoring the visible satellite is repeated infinitely, it takes more time than the blind scan and the user may judge as an error. Accordingly, the automatic broadcasting satellite tracking device 100 confirms that a predetermined number (four or more) of visible satellites are monitored while the operation of monitoring the visible satellites is repeated a predetermined number of times or less.

When a predetermined number or more of the visible satellites are monitored, the automatic broadcasting satellite tracking device 100 determines the current position of the moving object to receive the broadcasting satellite (S404). At this time, the automatic broadcasting satellite tracking device 100 can determine the coordinates (X, Y, Z) of the moving object (particularly, the antenna of the moving object) using the GNSS signal received from the visible satellite through the antenna.

Specifically, as shown in FIG. 2, the automatic broadcasting satellite tracking apparatus 100 uses time information included in a GNSS signal received from a plurality of visible satellites and time information obtained by receiving a GNSS signal, (X, y, z) of the moving object can be determined by creating virtual spheres having radiuses of each of the obtained distances. The technique of obtaining the coordinates of the moving object using the GNSS is a well-known technique, and a detailed description of the operation will be omitted.

The automatic broadcasting satellite tracking device 100 acquires the fixed position coordinates of the broadcasting satellite transmitting the satellite broadcasting signal of the channel selected by the user in the moving object (S405). At this time, the automatic broadcasting satellite tracking device 100 can receive channel information selected by the user from a satellite broadcasting receiver provided at a predetermined position of the moving object.

Since the broadcasting satellite is a satellite fixed on the equatorial line, the position coordinates do not change. According to an embodiment of the present invention, fixed position coordinates (Pn (Xn, Yn, Zn)) (where n is the number of stored broadcast satellites and is a natural number of 1 or more) And stored in a separate memory.

The automatic broadcasting satellite tracking apparatus 100 calculates an altitude angle and an azimuth of the broadcasting satellite based on the moving object using the position coordinates of the broadcasting satellite and the current position coordinates of the moving object (S406).

Specifically, the automatic broadcasting satellite tracking device 100 uses the current position coordinates of the moving object determined in step S404 and the fixed position coordinates of the broadcasting satellites obtained in step S405 to calculate the line- of-sight. For example, the gaze vector can be obtained by subtracting the fixed position coordinates P (X, Y, Z) of the broadcasting satellite from the current position coordinates O (X, Y, Z) of the moving object with reference to FIG. At this time, dividing the line-of-sight vector by the size of the line-of-sight vector,

Figure 112015124368767-pat00009
), And the formula for this may be as shown in Equation (1).

The automatic broadcasting satellite tracking apparatus 100 includes a current position coordinate of a moving object, a position coordinate of a broadcasting satellite,

Figure 112015124368767-pat00010
The azimuth and altitude of the broadcasting satellite can be obtained based on the moving object. At this time, the automatic broadcasting satellite tracking device 100 can obtain the azimuth angle A and the altitude angle E using equations (2) and (3).

The accurate direction and position of the broadcasting satellite can be tracked using the current position coordinates of the moving object, the position coordinates of the broadcasting satellites, and the azimuth angle A and the altitude angle E of the broadcasting satellite based on the moving object obtained through the above process .

The automatic broadcasting satellite tracking apparatus 100 adjusts the direction of the antenna so that the satellite broadcasting antenna that receives the satellite broadcasting signal from the broadcasting satellite uses the azimuth angle and the altitude angle of the broadcasting satellite calculated in step S406 to direct the desired broadcasting satellite (S407). To this end, the automatic broadcasting satellite tracking device 100 may control a motor for adjusting the embossing angle and the azimuth angle of the antenna.

The automatic broadcasting satellite tracking apparatus 100 analyzes the satellite broadcasting signal received through the satellite broadcasting antenna and determines whether the broadcasting satellite is intended to be viewed by a mobile body, that is, a broadcasting satellite broadcasting a channel selected by the user (S408) . The automatic broadcasting satellite tracking device 100 can compare the channel information included in the satellite broadcasting signal received from the broadcasting satellite with the broadcasting channel information selected from the moving object so as to confirm whether the antenna is oriented to the broadcasting satellite to be viewed on the moving object.

As a result of checking in step S408, if the broadcasting satellite is requested by the user, the automatic broadcasting satellite tracking device 100 precisely adjusts the direction of the antenna while measuring the intensity of the satellite broadcasting signal received through the antenna from the broadcasting satellite (S409), (S410). For example, the automatic broadcasting satellite tracking device 100 receives the satellite broadcasting signals by adjusting the direction of the satellite broadcasting antenna within a predetermined angle range based on the elevation angle and the azimuth angle of the broadcasting satellite calculated in step S406. Here, the predetermined angle range can be set and changed in advance by the operator, the developer, and the like. The predetermined angle (first predetermined angle) and the predetermined angle (second predetermined angle) may be the same or different from each other with respect to the altitude angle based on the azimuth angle.

For example, the automatic broadcasting satellite tracking device 100 can finally determine the direction and the position of the satellite broadcasting antenna in a direction in which the largest signal among a plurality of signals received within a predetermined angle range is received.

On the other hand, if it is determined in step S402 that the operation of monitoring the visible satellite exceeds the preset predetermined number of repetitions, it is determined that the surrounding environment is poor, and the automatic broadcasting satellite tracking device 100 performs a blind scanning operation on the broadcasting satellite (S411).

Here, the blind scan is a technique for searching for a satellite signal (frequency) for a channel input to a satellite broadcast receiver, confirming a desired broadcast satellite or frequency, and receiving a satellite broadcast signal from a desired broadcast satellite. Since the blind scan technique is well known in the satellite broadcast technology, a detailed description of the operation will be omitted.

Similarly, when the broadcast satellite is tracked through the blind scan, the automatic broadcast satellite tracking device 100 also checks whether the broadcast satellite is aimed at broadcasting the broadcast of the channel selected by the user.

Finally, when the direction of the antenna is precisely adjusted and a satellite broadcast signal of a channel to be viewed by the user is received, the received hypotenuse broadcast signal can be transmitted to a satellite broadcast receiver through an LNB (Low Noise Block Downconverter) Can output the transmitted hypotenuse broadcast signal through the monitor.

As described above, according to the embodiment of the present invention, the azimuth angle and elevation angle of the broadcasting satellite are calculated on the basis of the current position coordinates of the moving object and the unique position coordinates of the broadcasting satellite with respect to the channel to be viewed, By driving the antenna to be oriented at an altitude angle, the satellite broadcast can be automatically tracked even when the mobile body is stationary or moving, and there is no difficulty in operation, installation and signal analysis.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the invention may be embodied in other specific forms. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: Automatic broadcasting satellite tracking device
110: visible satellite monitoring unit 120: moving object positioning unit
130: broadcasting satellite tracking unit 140: antenna driving unit

Claims (18)

A visible satellite monitoring unit for monitoring GNSS signals received through an antenna for a GNSS and monitoring a predetermined number or more of visible satellites;
A moving object positioning unit for determining current position coordinates of a moving object using a GNSS signal received from the predetermined number or more of visible satellites monitored using a satellite navigation system;
Obtain a line-of-sight from the current position of the moving object to the position of the broadcasting satellite using the fixed position coordinates of the broadcasting satellite with respect to the channel input to the satellite broadcasting receiver and the current position coordinates of the moving object, An azimuth of the broadcasting satellite is calculated based on a current position of the moving object by using a unit vector of a unit vector of the visual vector to track the position of the broadcasting satellite, A broadcast satellite tracking unit for receiving a satellite broadcast signal for the input channel through a blind scan operation when the predetermined number or more of the visible satellites are not monitored while the visible satellite monitoring operation of the satellite monitoring unit is operated a predetermined number of times or more; And
An antenna driving unit for adjusting a direction of an antenna for a satellite broadcasting provided in the moving object according to a position of the broadcast satellite,
Automatic satellite tracking system using satellite navigation system.
The broadcast satellite tracking system according to claim 1,
The fixed position coordinates of the broadcasting satellite transmitting the satellite broadcasting signal of the input channel are acquired from the memory in which the fixed position coordinates of the broadcasting satellites for each broadcasting channel are stored
Automatic broadcasting satellite tracking system using satellite navigation system.
delete delete The apparatus of claim 1,
And adjusting the direction of the antenna for satellite broadcasting according to the azimuth angle and the altitude angle so that the antenna for satellite broadcasting mounted at a predetermined position of the moving body is directed to the broadcasting satellite
Automatic satellite tracking system using satellite navigation system.
6. The antenna of claim 5,
And precisely adjusting the direction of the satellite broadcasting antenna in a direction in which the satellite broadcasting signal having the strongest intensity among the intensity of the satellite broadcasting signal received within a predetermined angle range based on the azimuth angle and the altitude angle is received
Automatic satellite tracking system using satellite navigation system.
delete delete The broadcast satellite tracking system according to claim 1,
Comparing the input channel information with channel information included in the satellite broadcast signal to confirm whether or not the satellite broadcast signal for the input channel is received
Automatic satellite tracking system using satellite navigation system. delete delete delete delete delete delete delete delete delete
KR1020150181644A 2015-12-18 2015-12-18 Device for automatically tracking a broadcast satellite using a Global Navigation Satellite System(GNSS) and method thereof KR101752677B1 (en)

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JP2002296338A (en) * 2001-03-29 2002-10-09 Clarion Co Ltd Method and apparatus for controlling satellite broadcasting reception antenna posture in mobile unit

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Publication number Priority date Publication date Assignee Title
JP2002296338A (en) * 2001-03-29 2002-10-09 Clarion Co Ltd Method and apparatus for controlling satellite broadcasting reception antenna posture in mobile unit

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