NZ762912A - Satellite tracking antenna system in a plurality of satellite environments and satellite tracking method using the same - Google Patents
Satellite tracking antenna system in a plurality of satellite environments and satellite tracking method using the same Download PDFInfo
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- NZ762912A NZ762912A NZ762912A NZ76291220A NZ762912A NZ 762912 A NZ762912 A NZ 762912A NZ 762912 A NZ762912 A NZ 762912A NZ 76291220 A NZ76291220 A NZ 76291220A NZ 762912 A NZ762912 A NZ 762912A
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- satellite
- signal
- information
- antenna
- tracking
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- 210000004279 Orbit Anatomy 0.000 claims abstract description 49
- 230000000875 corresponding Effects 0.000 claims description 22
- 230000001276 controlling effect Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 230000006266 hibernation Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Abstract
Provided are satellite tracking antenna system in a plurality of satellite environments and a satellite tracking method using the same, and more particularly, satellite tracking antenna system and method in a plurality of satellite environments, which may receive a satellite signal by stochastically estimating and tracking a target satellite using pre-stored information on satellite orbits, without information on satellite network identity (NID) for every received satellite signal. estimating and tracking a target satellite using pre-stored information on satellite orbits, without information on satellite network identity (NID) for every received satellite signal.
Description
SATELLITE TRACKING ANTENNA SYSTEM IN A PLURALITY OF
SATELLITE ENVIRONMENTS AND SATELLITE TRACKING METHOD USING
THE SAME
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority under 35 U.S.C. §119
to Korean Patent Application No. 2019-0036449, filed on
March 29, 2019 in the Korean Intellectual Property Office,
the disclosure of which is incorporated herein by reference
in its entirety.
TECHNICAL FIELD
The following disclosure relates to satellite
tracking antenna system in a plurality of satellite
environments and a satellite tracking method using the same,
and more particularly, to satellite tracking antenna system
in a plurality of satellite environments and a satellite
tracking method using the same, which may estimate and
track a target satellite in the plurality of satellite
environments without an indoor unit (IDU).
BACKGROUND
In Europe, there are many satellites. Each satellite
may have identical polarizations and repeaters, and thus
satellite signals may often overlap each other.
Each satellite may be set to a different orbit, and
may thus have different elevation and azimuth angle.
However, due to a narrow distance among satellite orbits,
it is not certain whether a received satellite signal is a
satellite signal of a target satellite without separate
satellite identification.
Therefore, in order to solve this problem, the target
satellite may be more accurately tracked: by first
estimating the target satellite through polarization
information, frequency information and the like obtained
through information from the satellite repeater; by
determining whether the estimated target satellite has the
same polarization, symbol rate, frequency and the like as
those of the target satellite checked through the indoor
unit (IDU); and by determining whether the estimated target
satellite has the same network identity (NID) as that
included in the satellite signal of the target satellite
detected by the NID database.
That is, the prior IDU is an essential component of
an antenna system because the prior IDU may control on/off
of the antenna, monitor a condition of the antenna, and
estimate and track the target satellite in a plurality of
satellite environments through tuner control. However,
connection and installation methods of the antenna, IDU and
set-top box may be very complicated, and a non-professional
user may thus have difficulties in installing or
maintaining this system himself/herself.
In addition, as a satellite condition changes, it may
be troublesome to update the tracking frequency,
polarization and the like of the target satellite by
updating the antenna firmware. The reason is that the
antenna firmware may be updated by downloading firmware
update data through a separate storage means and then by
uploading the firmware update data downloaded to the IDU.
In addition, in the prior antenna system installed in
a vehicle and connected to the vehicle battery supplies,
current consumption may not be limited because the IDU
serves to supply power. Therefore, a vehicle may inevitably
have greater battery consumption.
In this regard, KR10-0392253B1 discloses an active
antenna system and its tracking method capable of receiving
a satellite signal of a desired satellite while it is
moving in an environment of a plurality of satellite
signals having the same polarization and the same frequency
and coping with changes in a level of receiving the
satellite signal, a tracking frequency, a bandwidth of a
tracked channel and the like, based on a change in a region
to receive the satellite signal.
In order to solve the problems of the prior art,
satellite tracking antenna system in the plurality of
satellite environments and satellite tracking method using
the same according to an embodiment of the present
disclosure are intended to estimate and track the desired
satellite (i.e., target satellite) in the plurality of
satellite environments without connection to the IDU.
【Cited Reference 】
【Patent Document 】
KR10-0392253B1 (July 9, 2003)
SUMMARY
An embodiment of the present disclosure is directed
to providing satellite tracking antenna system in a
plurality of satellite environments and satellite tracking
method using the same, which may estimate and track a
target satellite in the plurality of satellite environments
without an indoor unit (IDU).
In addition, another embodiment of the present
disclosure is directed to providing a low current antenna
system with low current consumption by not using the IDU.
In one general aspect, a satellite tracking antenna
system in a plurality of satellite environments includes:
an antenna unit including: an antenna receiving a satellite
signal from at least one satellite in the plurality of
satellite environments, a satellite signal converter down-
converting a frequency of the satellite signal received by
the antenna to an intermediate frequency, a signal
intensity detector detecting intensity of the satellite
signal having the frequency down-converted by the satellite
signal converter and a controller estimating and tracking a
target satellite corresponding to the satellite signal by
using information on the intensity of the satellite signal
detected by the signal intensity detector and pre-stored
information on orbits of a plurality of satellites; and a
satellite broadcasting receiver transmitting the satellite
signal transmitted from the antenna unit to an output means,
wherein the controller may estimate the target satellite by
calculating information on satellite location corresponding
to the satellite signal detected by the signal intensity
detector and then by comparing and analyzing the calculated
information on the satellite location with the pre-stored
information on the orbits of the plurality of satellites.
The signal intensity detector may detect the
intensity of the satellite signal only when the intensity
of the satellite signal is greater than a predetermined
threshold value.
In addition, the antenna unit may further include a
memory storing and managing the information on the orbits
of the plurality of satellites as its database, and the
controller may calculate information on satellite orbit
distances based on the antenna by comparing and analyzing
the information on the satellite orbits of the memory with
the information on the satellite location.
In addition, the controller may estimate a satellite
having the closest orbit distance among the information on
the satellite orbit distances as the target satellite.
In addition, the antenna unit may further include a
motor moving the antenna to an estimated location of the
target satellite and a motor driver driving the motor based
on a driving signal of the controller.
In addition, the satellite tracking antenna system in
a plurality of satellite environments may further include a
user terminal having an application installed therein, the
application generating a control signal for controlling the
antenna unit based on an input signal.
In addition, the antenna unit may further include a
communicator to perform near field communication (NFC) with
the user terminal, and the communicator may receive the
control signal for estimating and tracking the target
satellite through the near field communication (NFC) with
the user terminal.
In another general aspect, a satellite tracking
antenna method in a plurality of satellite environments
includes: a satellite signal receiving step of receiving
the satellite signal from at least one satellite in the
plurality of satellite environments, by an antenna unit; a
frequency converting step of down-converting a frequency of
the satellite signal received in the satellite signal
receiving step to an intermediate frequency, by the antenna
unit; a satellite signal intensity detecting step of
detecting the intensity of the satellite signal having the
frequency down-converted in the frequency converting step,
by the antenna unit; a location calculating step of
calculating information on the satellite location
corresponding to information on the intensity of the
satellite signal detected in the satellite signal intensity
detecting step, by the antenna unit; an analyzing step of
estimating a target satellite corresponding to the
satellite signal by comparing and analyzing the calculated
information on the satellite location in the location
calculating step with pre-stored information on orbits of a
plurality of satellites, by the antenna unit; and a
tracking step of moving an antenna to an estimated location
of the target satellite in the analyzing step, by the
antenna unit, wherein in the analyzing step, a satellite
having the closest orbit distance may be estimated as the
target satellite by comparing and analyzing the information
on the satellite location with the pre-stored information
on the orbits of the plurality of satellites, and then by
calculating information on satellite orbit distances based
on the antenna.
In the satellite signal intensity detecting step, the
intensity of the satellite signal may be detected only when
the intensity of the satellite signal is greater than a
predetermined threshold value.
The satellite tracking antenna method in a plurality
of satellite environments may further include a controlling
step of receiving a control signal for estimating and
tracking the target satellite from a user terminal, by the
antenna unit.
Other features and aspects are apparent from the
following detailed description, the drawings and the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
is an exemplary configuration of a prior
satellite tracking antenna system.
is an exemplary configuration of a satellite
tracking antenna system in a plurality of satellite
environments according to an embodiment of the present
disclosure.
is a configuration of a satellite tracking
antenna system in a plurality of satellite environments
according to an embodiment of the present disclosure.
is a flowchart of a satellite tracking method
using a satellite tracking antenna system in a plurality of
satellite environments according to an embodiment of the
present disclosure.
DETAILED DESCRIPTION OF EMBODIMENTS
Hereinafter, satellite tracking antenna system in a
plurality of satellite environments and satellite tracking
method using the same according to embodiments of the
present disclosure are described in detail with reference
to the accompanying drawings. The accompanying drawings to
be provided below are provided by way of example to
sufficiently transfer the idea of the present disclosure to
those skilled in the art to which the present disclosure
pertains. Therefore, the present disclosure is not limited
to the drawings to be provided below, but may be
implemented in other forms. In addition, like reference
numerals denote like elements throughout the specification.
Technical terms and scientific terms used in the
present specification have the general meaning understood
by those skilled in the art to which the present disclosure
pertains unless otherwise defined, and a description for
the known function and configuration unnecessarily
obscuring the gist of the present disclosure is omitted in
the following description and the accompanying drawings.
In addition, a system means a set of components
including devices, mechanisms, means and the like,
systematized in order to perform required functions and
regularly interacting with one another.
As shown in a prior satellite tracking
antenna system may generally include an antenna, an indoor
unit (IDU), a satellite broadcasting receiver (set-top box),
and an output means (television (TV)).
In a plurality of satellite environments such as
Europe, there are many identical polarizations and
repeaters for each satellite, and thus satellite signals
may inevitably overlap each other.
(For example, in Europe, the satellite signals such
as ASTRAs 1, 2, 3 and 4, Hotbird, Eutelsat 9E, Eutelsat 5W,
Turksat, Hellasat, Hispasat and the like may often overlap
each other).
As such, if there are many satellites and many
frequencies overlapping each other, a target satellite
cannot be accurately determined without satellite
identification.
Therefore, the target satellite may generally be
tracked: by first estimating the target satellite through
polarization information, frequency information and the
like obtained through information from the satellite
repeater; by confirming polarization information, symbol
rate information, and tracking frequency information of the
target satellite through the IDU; and by identifying the
same number of the target satellite through the network
identity (NID) database.
On the other hand, in Korea and Japan, even though
the Korean satellite and the Japanese satellite are located
close to each other, repeaters on coverage or spectrum do
not overlap each other. Therefore, the target satellite may
be tracked by selecting a tracking frequency without NID
identification.
That is, if it is determined that there is a
satellite, the antenna may be set to track a corresponding
point, and thus the antenna alone may be operated without
the IDU. However, since it is difficult to supply
sufficient power to operate the antenna through the
satellite broadcasting receiver, it is common to have a
separate power supply means, a power insert.
In Korea and Japan, this system is possible because
the satellite signals do not overlap each other. However,
if a plurality of satellite signals overlap each other as
in Europe, a satellite signal of the target satellite is
totally impossible to be specified by the antenna system as
used in Korea and Japan.
In addition, a current antenna system in Europe
necessarily requires the IDU, and thus the antenna system
may inevitably have an increased cost due to a
configuration of the IDU itself. Connection and
installation methods of the antenna, IDU and satellite
broadcasting receiver may be complicated, and it is almost
impossible for an ordinary user to install and maintain
this system.
In addition, an antenna system installed on the
vehicle, in order to update the antenna firmware based on a
change in a satellite condition, the update may be
performed only through the IDU. Current consumption of the
IDU may increase battery consumption of a vehicle.
For example, the prior satellite antenna system may
track the satellite by detecting intensity of the satellite
signal while changing the elevation and azimuth angles
using a satellite tracking method of a positioner-type
antenna system; may identify the tracking frequency,
polarization, symbol rate, digital video broadcasting
(DVB)-S/S2 method and NID of the satellite in the spot if
it is determined that there is the satellite; and may
maintain the antenna at a corresponding position if the
satellite is identified. While maintaining its position,
the antenna may convert power of the IDU to hibernation
mode, and drive a low noise block down converter (LNB) with
power of the receiver to enable a watcher to watch
satellite broadcasts through an output means (television
(TV)) connected thereto.
As described above, the prior satellite antenna
system may necessarily require a configuration of the IDU
for the satellite identification if there are many
satellites and many frequencies overlapping each other, and
have inconvenience of including the configuration of the
IDU and unnecessary current consumption by the IDU.
To solve this problem, as shown in satellite
tracking antenna system in a plurality of satellite
environments and satellite tracking method using the same
according to an embodiment of the present disclosure may
perform estimation and tracking of a satellite using only a
satellite signal received by an antenna and information on
a corresponding satellite orbit without an indoor unit
(IDU).
In particular, there is no configuration of the IDU,
and power supply may thus be possible directly by a
receiver by the antenna. The antenna, satellite
broadcasting receiver (set-top box) and output means
(television (TV)) may be simply connected to each other and
an ordinary user may thus easily install and maintain this
system.
However, in the satellite tracking antenna system in
the plurality of satellite environments and the satellite
tracking method using the same according to an embodiment
of the present disclosure, there is no configuration of the
prior IDU to control the antenna. It is thus preferable to
receive a control signal through a user terminal
(smartphone or the like) to control the antenna, which is
described below in detail.
is a configuration of a satellite tracking
antenna system in a plurality of satellite environments
according to an embodiment of the present disclosure. The
satellite tracking antenna system in the plurality of
satellite environments according to an embodiment of the
present disclosure is described in detail with reference to
As shown in the satellite tracking antenna
system in the plurality of satellite environments according
to an embodiment of the present disclosure may be
preferably configured to include an antenna unit 100 and a
satellite broadcasting receiver 200 transmitting the
satellite signal transmitted from the antenna unit 100 to
an output means 300.
The satellite broadcasting receiver 200 may
preferably be configured to include the set-top box, and
the output means 300 may preferably be configured to
include the TV.
As described above, the satellite tracking antenna
system in the plurality of satellite environments according
to an embodiment of the present disclosure is an antenna
system for estimating and tracking a desired satellite
(target satellite) while receiving satellite signals from a
plurality of satellites in an environment in which the
plurality of satellites exist. To this end, as shown in the antenna unit 100 may preferably be configured to
include an antenna 110, a satellite signal converter 120, a
signal intensity detector 130 and a controller 140.
Each component is described in detail as follows.
The antenna 110 may receive the satellite signal from
at least one satellite in the plurality of satellite
environments, and the satellite signal converter 120 may
down-convert a frequency of the satellite signal received
by the antenna 110 to an intermediate frequency.
To this end, the satellite signal converter 120 may
preferably be configured to include low noise block down
converter (LNB). The satellite signal converter 120 may
amplify the satellite signal, remove noise included in the
satellite signal and down-convert the frequency of the
satellite signal received by the antenna 110 to the
intermediate frequency.
Here, the satellite signal converter 120 may have
different polarizations HH, HV, LH and LV, which may be
supported based on a configuration of the LNB, and the
polarization may be determined by power input to the LNB.
The present disclosure does not limit the configuration of
the LNB or the polarization supported based thereon.
In addition, the antenna unit 100 may preferably be
configured to further include a power divider (not shown)
dividing the satellite signal having the frequency down-
converted through the satellite signal converter 120 into a
satellite signal having two identical frequencies.
The signal intensity detector 130 may detect
intensity of the satellite signal having the down-converted
frequency through the power divider.
In detail, the signal intensity detector 130 may
preferably detect the intensity of the satellite signal by
outputting an automatic gain control (AGC) signal having a
set frequency.
Here, the frequency may conventionally be set through
an operation of the IDU. However, the present disclosure
does not include the IDU, and it is thus preferable to
input the control signal for setting the frequency from the
outside.
To this end, as shown in the satellite
tracking antenna system in the plurality of satellite
environments according to an embodiment of the present
disclosure may preferably be configured to further include
a user terminal 400 including a smart phone and capable of
performing near field communication (NFC).
In detail, an application may most preferably be
installed in the user terminal 400 in advance, the
application being capable of generating the control signal
for controlling the antenna unit 100 based on an input
signal input by an external user.
The antenna unit 100 may be configured to include a
communicator 170 to perform communication with the user
terminal 400.
Here, the communicator 170 may preferably perform the
near field communication (NFC) so that the antenna unit 100
uses a global positioning system (GPS) signal of the user
terminal 400 to predict location information on which the
antenna 110 is installed (equipped). In addition, the
satellite broadcasting receiver 200 may supply a driving
power to the antenna unit 100 based on the control signal
of the user terminal 400.
The user terminal 400 may also preferably be
configured to perform the near field communication (NFC)
such as bluetooth, and may transmit the control signal
generated through the application to the antenna unit 100
through the near field communication (NFC).
That is, in detecting the intensity of the satellite
signal by outputting the AGC signal of the frequency set by
the signal intensity detector 130, the control signal for
setting the frequency may most preferably be received
through the near field communication (NFC) with the user
terminal 400.
The intensity of the satellite signal may be
preferably detected by converting the AGC signal output
from the signal intensity detector 130 into an analog-to-
digital signal through an analog-to-digital converter (not
shown) and then by analyzing the converted signal.
Here, it may be preferable that the signal intensity
detector 130 detects the intensity of the satellite signal
only when the intensity of the satellite signal is greater
than a predetermined threshold value, or detects all
satellite signals, but transmits information on the
intensity of the satellite signal to the controller 140
only when the intensity of the satellite signal is greater
than the predetermined threshold value.
That is, the signal intensity detector 130 may
preferably transmit the information on the intensity of the
satellite signal to the controller 140 only when the
intensity of the satellite signal is greater than a noise,
i.e. the predetermined threshold value of a corresponding
region.
Through this configuration, it is preferable not to
perform any further estimation or tracking for a satellite
signal having a weak signal intensity among a plurality of
satellite signals received by the antenna 110.
The controller 140 may preferably estimate and track
the target satellite corresponding to the satellite signal
by using the information on the intensity of the satellite
signal detected by the signal intensity detector 130 and
pre-stored information on orbits of the plurality of
satellites.
To this end, the antenna unit 100 may preferably be
configured to further include a memory 141, and the memory
141 may preferably store and manage the information on the
orbits of the plurality of satellites as its database.
The information on the satellite orbits may
preferably be configured to include elevation and azimuth
angles of the plurality of satellites, which are the
information on the orbits of the plurality of satellites.
In addition, the controller 140 may calculate the
information on the satellite location corresponding to the
information on the intensity of the satellite signal
detected by the signal intensity detector 130.
Here, the satellite signal detected by the signal
intensity detector 130 may correspond to a case where the
intensity of the satellite signal is greater than the
predetermined threshold value as described above.
The controller 140 may preferably calculate the
information on the satellite location corresponding to the
satellite signal detected by the signal intensity detector
130. In other words, the controller 140 may preferably
calculate the information on the satellite location by
calculating the elevation and azimuth angles of location
where the satellite signal is detected.
Here, as described above, if the GPS signal of the
user terminal 400 is transmitted and used, the information
on the location where the satellite signal is detected may
become more accurate. It is thus possible to improve the
accuracy in calculating the information on the satellite
location by calculating the elevation and azimuth angles of
the detected satellite signal.
That is, through this system, the controller 140 may
calculate information on satellite orbit distances based on
the antenna 110 by comparing and analyzing the information
on the satellite orbits stored and managed by the memory
141 with the calculated information on the satellite
location.
In other words, the controller 140 may calculate the
information on the satellite location corresponding to the
satellite signal detected by the signal intensity detector
130 by calculating the elevation and azimuth angles of the
location where the corresponding satellite signal is
detected. The controller 140 may compare and analyze the
pre-stored information on the orbits of the plurality of
satellites with the calculated information on the satellite
location.
Accordingly, the controller 140 may calculate the
information on the satellite orbit distance based on the
location where the satellite signal is detected.
Based on this calculation, the controller 140 may
preferably estimate a satellite having the closest orbit
distance among the information on the satellite orbit
distances as the target satellite.
In other words, the satellite having the information
on the orbit distance closest to the location where the
satellite signal is detected may be estimated as the target
satellite.
In detail, the controller 140 may preferably be
configured to include an algorithm for estimating
(detecting) the target satellite by: generating a set of
signals including a signal recognized as that of the target
satellite among the satellite signals detected by the
signal intensity detector 130; calculating an angular value
of the satellite based on each signal in the generated set
of signals; and using a correlation between the calculated
angular value of the satellite and the generated set of
signals.
In addition, the antenna unit 100 may preferably be
configured to include a motor 150 and a motor driver 160 to
track the target satellite estimated through the controller
140.
It may be preferable that the motor 150 moves the
antenna 110 to location of the target satellite estimated
by the controller 140, and the motor driver 160 drives the
motor 150 based on a driving signal of the controller 140.
It may be preferable that the antenna 110 moved in
this way has a fixed position and the satellite signal is
then transmitted to the satellite broadcasting receiver 200
and output through the output means 300. Here, it is most
preferable that the satellite signal transmitted to the
satellite broadcasting receiver 200 has the frequency down-
converted to the intermediate frequency divided through the
power divider.
is a flowchart of a satellite tracking method
using a satellite tracking antenna system in a plurality of
satellite environments according to an embodiment of the
present disclosure. The satellite tracking method using the
satellite tracking antenna system in the plurality of
satellite environments according to an embodiment of the
present disclosure is described in detail with reference to
As shown in the satellite tracking antenna
method in the plurality of satellite environments according
to an embodiment of the present disclosure may preferably
include: a satellite signal receiving step (S100), a
frequency converting step (S200), a satellite signal
intensity detecting step (S300), a location calculating
step (S400), an analyzing step (S500) and a tracking step
(S600).
Each step is described in detail as follows.
In the satellite signal receiving step (S100), the
satellite signal may be received from at least one
satellite in the plurality of satellite environments by an
antenna unit 100.
That is, in the satellite signal receiving step
(S100), the satellite signal may preferably be received
from the at least one satellite in the plurality of
satellite environments by an antenna 110 of the antenna
unit 100.
In the frequency converting step (S200), the antenna
unit 100 may down-convert a frequency of the satellite
signal received in the satellite signal receiving step
(S100) to an intermediate frequency.
In detail, in the frequency converting step (S200), a
satellite signal converter 120 of the antenna unit 100 may
down-convert the frequency of the received satellite signal
to the intermediate frequency. To this end, the satellite
signal converter 120 may preferably be configured to
include low noise block down converter (LNB). The satellite
signal converter 120 may amplify the received satellite
signal, remove noise included in the satellite signal and
down-convert the frequency of the satellite signal to the
intermediate frequency.
In the satellite signal intensity detecting step
(S300), the antenna unit 100 may detect the intensity of
the satellite signal having the frequency down-converted in
the frequency converting step (S200).
In the satellite signal intensity detecting step
(S300), the signal intensity detector 130 of the antenna
unit 100 may preferably detect the intensity of the
satellite signal having the down-converted frequency
divided into two identical frequencies through a power
divider (not shown).
In detail, in the satellite signal intensity
detecting step (S300), the signal intensity detector 130 of
the antenna unit 100 may preferably detect the intensity of
the satellite signal by outputting an automatic gain
control (AGC) signal having a set frequency.
Here, the frequency may conventionally be set through
an operation of an indoor unit (IDU). However, the present
disclosure does not include the IDU, and it is thus
preferable to input the control signal for setting the
frequency from the outside.
To this end, as shown in it is preferable to
further perform a controlling step (S10) in the satellite
tracking method using the satellite tracking antenna system
in the plurality of satellite environments according to an
embodiment of the present disclosure.
In the controlling step (S10), various control
signals for estimating and tracking the target satellite
may be received from a user terminal 400.
As described above, in the controlling step (S10),
there may be received the control signal for setting the
frequency or various control signals such as tracking
polarization setting and fine adjustment of the antenna and
an on/off control signal of the antenna unit for each step.
In the satellite signal intensity detecting step
(S300), the intensity of the satellite signal may
preferably be detected only when the intensity of the
satellite signal is greater than a predetermined threshold
value or information on the intensity of the satellite
signal may be transmitted to perform the location
calculating step (S400) only when the intensity of the
satellite signal is greater than the predetermined
threshold value.
Through this configuration, it is preferable not to
perform any further estimation or tracking for a satellite
signal having a weak signal intensity among a plurality of
satellite signals received by the antenna 110.
In the location calculating step (S400), the
antenna unit 100 may calculate information on the satellite
location corresponding to information on the intensity of
the satellite signal detected in the satellite signal
intensity detecting step (S300).
In other words, in the location calculating
step (S400), the controller 140 of the antenna unit 100 may
preferably calculate the information on the satellite
location corresponding to the satellite signal detected in
the satellite signal intensity detecting step (S300). That
is, the controller 140 may preferably calculate elevation
and azimuth angles of location where the satellite signal
is detected and calculate the information on the satellite
location.
Here, as described above, if a global
positioning system (GPS) signal of the user terminal 400 is
transmitted and used, the information on the location where
the satellite signal is detected may become more accurate.
It is thus possible to improve the accuracy in calculating
the information on the satellite location by calculating
the elevation and azimuth angles of the detected satellite
signal.
In the analyzing step (S500), the antenna unit
100 may estimate the target satellite corresponding to the
satellite signal by comparing and analyzing the calculated
information on the satellite location in the location
calculating step (S400) with pre-stored information on
orbits of a plurality of satellites.
In detail, in the analyzing step (S500), the
controller 140 of the antenna unit 100 may estimate a
satellite having the closest orbit distance as the target
satellite by comparing and analyzing the information on the
satellite orbits stored and managed by the memory 141 with
the calculated information on the satellite location, and
then by calculating information on satellite orbit
distances based on the antenna 110.
That is, the information on the satellite
location corresponding to the detected satellite signal may
be calculated by calculating the elevation and azimuth
angles of the location where the corresponding satellite
signal is detected, and the pre-stored information on the
orbits of the plurality of satellites and the calculated
information on the satellite location may be compared and
analyzed.
Accordingly, the information on the satellite
orbit distance may be calculated based on the location
where the satellite signal is detected.
Based on this calculation, a satellite having
the closest orbit distance among the calculated information
on the satellite orbit distances may preferably be
estimated as the target satellite.
In other words, the satellite having the
information on the orbit distance closest to the location
where the satellite signal is detected may be estimated as
the target satellite.
In the tracking step (S600), the antenna 110 of
the antenna unit 100 may be moved to an estimated location
of the target satellite in the analyzing step (S500).
In the tracking step (S600), the antenna 110
may be moved to the estimated location of the target
satellite through driving control of a motor 150 and a
motor driver 160 to track the target satellite estimated
through the controller 140. Then, it may be preferable that
the antenna 110 moved in this way has a fixed position and
the satellite signal is then transmitted to the satellite
broadcasting receiver 200 and output through the output
means 300. Here, it is most preferable that the satellite
signal transmitted to the satellite broadcasting receiver
200 has the frequency down-converted to the intermediate
frequency divided through the power divider.
That is, in other words, through the operations
of these components, the satellite tracking antenna system
in the plurality of satellite environments and the
satellite tracking method using the same according to an
embodiment of the present disclosure may receive the
satellite signal by stochastically estimating and tracking
the target satellite using the pre-stored information on
the satellite orbits, without information on satellite
network identity (NID) for every received satellite signal.
In addition, its maintenance is very easy
because the target satellite is estimated using the
information on the unchanged satellite orbits, and thus no
separate update is required even though the satellite
repeater information, the satellite broadcast information
or the information on the satellite NID is changed. In
addition, the present disclosure may be configured to have
a low current antenna system by not using the IDU, thereby
reducing battery consumption of a vehicle.
Through the above configuration, the satellite
tracking antenna system in the plurality of satellite
environments and the satellite tracking method using the
same according to an embodiment of the present disclosure
may configure a low power antenna system estimating and
tracking the desired satellite (target satellite) in the
plurality of satellite environments even without the IDU.
In addition, the present disclosure does not
require the IDU, and it is thus possible to reduce the
installation cost of the antenna system itself. In addition,
the antenna unit may be directly connected to the satellite
broadcasting receiver, and it is thus easier to connect and
install the devices compared to those of the prior antenna
system, such that even an ordinary user may easily manage
this system.
In addition, as the satellite environment
changes, in a case where the firmware update of the antenna
is performed to update the tracking frequency, polarization
and the like of the target satellite, it is possible not
only to upload the firmware update data of the antenna, but
also to support interface for control the antenna unit
through the communication with the user terminal.
Hereinabove, although the present disclosure is
described by specific matters such as detailed components,
exemplary embodiments and the accompanying drawings, they
are provided only for assisting in the entire understanding
of the present disclosure. Therefore, the present
disclosure is not limited to the exemplary embodiments.
Various modifications and changes may be made by those
skilled in the art to which the present disclosure pertains
from this description.
Therefore, the spirit of the present disclosure
should not be limited to these exemplary embodiments, but
the claims and all of modifications equal or equivalent to
the claims are intended to fall within the scope and spirit
of the present disclosure.
Claims (10)
1. A satellite tracking antenna system in a plurality of satellite environments, comprising: an antenna unit including: an antenna receiving a satellite signal from at least one satellite in the plurality of satellite environments, a satellite signal converter down-converting a frequency of the satellite signal received by the antenna to an intermediate frequency, a signal intensity detector detecting intensity of the satellite signal having the frequency down-converted by the satellite signal converter and a controller estimating and tracking a target satellite corresponding to the satellite signal by using information on the intensity of the satellite signal detected by the signal intensity detector and pre-stored information on orbits of a plurality of satellites; and a satellite broadcasting receiver transmitting the satellite signal transmitted from the antenna unit to an output means, wherein the controller estimates the target satellite by calculating information on satellite location corresponding to the satellite signal detected by the signal intensity detector and then by comparing and analyzing the calculated information on the satellite location with the pre-stored information on the orbits of the plurality of satellites.
2. The satellite tracking antenna system in a plurality of satellite environments of claim 1, wherein the signal intensity detector detects the intensity of the satellite signal only when the intensity of the satellite signal is greater than a predetermined threshold value.
3. The satellite tracking antenna system in a plurality of satellite environments of claim 2, wherein the antenna unit further includes a memory storing and managing the information on the orbits of the plurality of satellites as its database, and the controller calculates information on satellite orbit distances based on the antenna by comparing and analyzing the information on the satellite orbits of the memory with the information on the satellite location.
4. The satellite tracking antenna system in a plurality of satellite environments of claim 3, wherein the controller estimates a satellite having the closest orbit distance among the information on the satellite orbit distances as the target satellite.
5. The satellite tracking antenna system in a plurality of satellite environments of claim 4, wherein the antenna unit further includes a motor moving the antenna to an estimated location of the target satellite and a motor driver driving the motor based on a driving signal of the controller.
6. The satellite tracking antenna system in a plurality of satellite environments of claim 4, further comprising a user terminal having an application installed therein, the application generating a control signal for controlling the antenna unit based on an input signal.
7. The satellite tracking antenna system in a plurality of satellite environments of claim 6, wherein the antenna unit further includes a communicator to perform near field communication (NFC) with the user terminal, and the communicator receives the control signal for estimating and tracking the target satellite through the near field communication (NFC) with the user terminal.
8. A satellite tracking method using a satellite tracking antenna system in a plurality of satellite environments, comprising: a satellite signal receiving step of receiving the satellite signal from at least one satellite in the plurality of satellite environments, by an antenna unit; a frequency converting step of down-converting a frequency of the satellite signal received in the satellite signal receiving step to an intermediate frequency, by the antenna unit; a satellite signal intensity detecting step of detecting the intensity of the satellite signal having the frequency down-converted in the frequency converting step, by the antenna unit; a location calculating step of calculating information on the satellite location corresponding to information on the intensity of the satellite signal detected in the satellite signal intensity detecting step, by the antenna unit; an analyzing step of estimating a target satellite corresponding to the satellite signal by comparing and analyzing the calculated information on the satellite location in the location calculating step with pre-stored information on orbits of a plurality of satellites, by the antenna unit; and a tracking step of moving an antenna to an estimated location of the target satellite in the analyzing step, by the antenna unit, wherein in the analyzing step, a satellite having the closest orbit distance is estimated as the target satellite by comparing and analyzing the information on the satellite location with the pre-stored information on the orbits of the plurality of satellites, and then by calculating information on satellite orbit distances based on the antenna.
9. The satellite tracking method of claim 8, wherein in the satellite signal intensity detecting step, the intensity of the satellite signal is detected only when the intensity of the satellite signal is greater than a predetermined threshold value.
10. The satellite tracking method of claim 8, further comprising a controlling step of receiving a control signal for estimating and tracking the target satellite from a user terminal, by the antenna unit.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2019-0036449 | 2019-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
NZ762912A true NZ762912A (en) | 2020-03-27 |
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