KR101832910B1 - Apparatus for detecting satellite signal using arrayed filter - Google Patents

Abstract

The present invention relates to a satellite signal detecting apparatus of a filter arrangement type, more particularly, to a satellite signal detecting apparatus for detecting a satellite signal at a high speed by arranging one or more filters and real- And more particularly, to a satellite signal detecting apparatus of an arrangement type. The apparatus for detecting a satellite signal of a filter array system according to an embodiment of the present invention includes a frequency converter for converting a frequency of a satellite signal to generate an intermediate signal, an analog-to-digital converter for converting the intermediate signal into a digital signal, Wherein the number of the filters is calculated based on a frequency variation range of the intermediate signal and a conversion frequency interval of the frequency conversion section, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite-

The present invention relates to a satellite signal detecting apparatus of a filter arrangement type, more particularly, to a satellite signal detecting apparatus for detecting a satellite signal at a high speed by arranging one or more filters and real- And more particularly, to a satellite signal detecting apparatus of an arrangement type.

Currently, there are about 410 Geostationary Earth Orbits (GEO) in operation over the Earth. On the ground, in order to improve the communication quality with the satellite, it is necessary to track the target satellite among a plurality of satellites and selectively communicate with the target satellite.

However, many geostationary orbiting satellites are arranged at intervals of only 1 to 3 degrees, and radio waves are interfered between adjacent satellites if the target satellites are not accurately tracked on the ground. In order to prevent such interference, the International Telecommunication Union (ITU-R) recommends that interference be regulated between geostationary satellites in adjacent orbits to comply with them. Therefore, a study has been made on a method of accurately tracking a target satellite.

Generally, a method of detecting a beacon signal among satellite signals is used in order to accurately track a target satellite on the ground. The beacon signal is a signal transmitted from a satellite, and is a signal periodically transmitted to transmit position information of a satellite. On the ground, beacon signals are detected to track the target satellites, and the position and direction of the antenna can be adjusted in the direction of the satellite.

More specifically, a satellite signal detection method including a beacon signal uses an analog RSSI (Received Signal Strength Intensity) method for adjusting a center frequency of a filter using a narrowband analog filter. In addition, a digital FFT (Fast Fourier Transform) method for converting the satellite signal into the frequency domain, analyzing the slope of the beam pattern, and correcting the angle of the antenna by predicting the beam pattern having the maximum size is used.

However, in the conventional satellite signal detection apparatus, there is a problem that the frequency of the filter must be adjusted as the frequency of the satellite signal fluctuates by detecting the satellite signal with one filter. In addition, the conventional satellite signal detecting apparatus has a problem that it can not detect the satellite signal at high speed due to the time delay due to the filter frequency control by detecting the satellite signal with a filter having one center frequency. In addition, since the conventional satellite signal detecting apparatus does not use a plurality of filters having overlapping bandwidths, there is a problem that satellite signals can not be detected in real time in the frequency variation range of the satellite signals. In addition, the conventional satellite signal detecting apparatus can not communicate with the antenna control apparatus for controlling the direction of the antenna, so that the antenna can not be controlled in real time.

The present invention relates to a satellite signal detecting apparatus of a filter arrangement type capable of detecting a satellite signal without adjusting the frequency of a filter by calculating the number of filters based on a frequency variation range of the satellite signal and a conversion frequency interval for converting the frequency of the satellite signal And to provide the above-mentioned objects.

In addition, the present invention uses a plurality of filters whose center frequency is a frequency subtracted or added by a conversion frequency interval from the frequency of the converted satellite signal, so that the satellite signal can be detected at high speed in real time And to provide a satellite signal detecting apparatus of a filter array system.

The present invention also provides a satellite of a filter arrangement scheme capable of detecting a satellite signal at all frequencies regardless of a frequency variation of the satellite signal by setting the bandwidth of the filter based on the carrier-to-noise ratio and the minimum set noise ratio of the satellite signal. And to provide a signal detecting apparatus.

The present invention also relates to a method and apparatus for generating a control signal based on a signal-to-noise ratio of a satellite signal and transmitting a control signal to the antenna control unit, And an object of the present invention is to provide an arrangement-type satellite signal detecting apparatus.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description and more clearly understood by the embodiments of the present invention. Also, the objects and advantages of the invention will be readily appreciated that this can be realized by the means as claimed and combinations thereof.

According to an aspect of the present invention, there is provided an apparatus for detecting a satellite signal of a filter array system, including a frequency converter for converting a frequency of a satellite signal to generate an intermediate signal, And a measuring unit for measuring the magnitude of the detected digital signal, wherein the number of the filters is determined by a frequency variation range of the intermediate signal and a conversion frequency interval of the frequency conversion unit Is calculated.

According to the present invention as described above, there is an effect that the satellite signal can be detected without adjusting the frequency of the filter by calculating the number of filters based on the frequency variation range of the satellite signal and the conversion frequency interval for converting the frequency of the satellite signal .

Further, according to the present invention, by using a plurality of filters whose center frequency is a frequency subtracted or added by a conversion frequency interval from the frequency of the converted satellite signal, satellite signals can be detected at high speed in real time There is an effect that can be.

According to the present invention, the bandwidth of the filter is set on the basis of the carrier-to-noise ratio and the minimum set noise ratio of the satellite signal, thereby enabling the satellite signal to be detected at all frequencies regardless of the frequency variation of the satellite signal.

According to the present invention, a control signal is generated based on a signal-to-noise ratio of a satellite signal, and a control signal is transmitted to the antenna control unit so that the accurate position of the satellite can be grasped and the antenna is controlled to track the position of the satellite It is effective.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating a satellite signal detection apparatus of a filter arrangement scheme according to an embodiment of the present invention; FIG.
FIG. 2 illustrates a satellite signal detection apparatus of a filter arrangement scheme according to another embodiment of the present invention. FIG.
3 is a graph showing the filter response and center frequency of the first and second filters according to an embodiment of the present invention.
4 is a view illustrating a control signal transmitted to an antenna control unit for controlling the direction of an antenna of a transceiver unit according to an embodiment of the present invention.
5 is a graph showing a waveform of a satellite signal according to an embodiment of the present invention.
6 is a graph illustrating the filter response of a filter arranged in a transform frequency interval according to an embodiment of the present invention.
FIG. 7 is a graph illustrating a magnitude and a signal-to-noise ratio of a satellite signal according to an embodiment of the present invention; FIG.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. 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 used to denote the same or similar elements.

FIG. 1 is a diagram illustrating an apparatus 100 for detecting a satellite signal of a filter arrangement scheme according to an embodiment of the present invention. 1, a satellite signal detecting apparatus 100 according to an embodiment of the present invention includes a frequency converting unit 110, an analog-to-digital converter 120, a filter 130, a measuring unit 140 And a transmission / reception unit 150. [0033] FIG. The satellite signal detecting apparatus 100 of the filter arrangement scheme shown in FIG. 1 is according to one embodiment, and the constituent elements thereof are not limited to the embodiment shown in FIG. 1, Changed or deleted. Hereinafter, the frequency conversion unit 110 and the analog-digital converter 120 will be described in detail with reference to FIG.

The frequency converter 110 according to an embodiment of the present invention may convert the frequency of the satellite signal to generate an intermediate signal. Here, the satellite signal may include a very high frequency radio signal for long distance communication. More specifically, the satellite signal may include a frequency corresponding to 30 GHz at 1 GHz as a radio signal used for satellite communication. In addition, the satellite signal may include a beacon signal periodically transmitted to transmit position information of a satellite, a vehicle, a ship, and the like. On the other hand, the satellite signal can be transmitted and received from a satellite, a satellite broadcasting transmission antenna, a satellite Internet two-way antenna, or an antenna for satellite data communication.

The frequency converter 110 can generate an intermediate signal by frequency-converting a super high frequency satellite signal received from the outside. For example, the frequency of a satellite signal distributed between 1 GHz and 2 GHz can be transformed to produce an intermediate signal having a frequency of 21.4 MHz. The frequency converter 110 may include a frequency mixer for generating an intermediate signal, a local oscillator controlled by a phase-locked loop (PLL), an internal filter, and the like.

More specifically, the local oscillator can supply a certain frequency according to the frequency synchronization interval of the phase-locked loop. At this time, the mixer can convert the frequency of the satellite signal by adding or subtracting a certain frequency supplied from the local oscillator to the frequency of the satellite signal. Then, an intermediate signal can be generated by selecting the frequency of the satellite signal subtracted from the frequency of the satellite signal added or subtracted from the constant frequency through the internal filter.

The analog-to-digital converter 120 according to an embodiment of the present invention may convert an intermediate signal to a digital signal. The intermediate signal may include an analog signal, and the analog-to-digital converter 120 may convert the intermediate signal, which is a continuous signal, into an encoded digital signal. The conversion process of the analog-to-digital converter 120 can be easily performed by the ordinary artisan, and a description thereof will be omitted.

FIG. 2 is a diagram illustrating an apparatus 100 for detecting a satellite signal of a filter arrangement scheme according to another embodiment of the present invention. FIG. 3 is a diagram illustrating a filter response of a first filter and a second filter according to an embodiment of the present invention, Fig. Hereinafter, the filter 130 will be described in detail with reference to FIGS. 1 to 3. FIG.

One or more filters 130 in accordance with an embodiment of the present invention may detect the converted digital signal. Here, the filter 130 may include a high pass filter (HPF), a low pass filter (LPF), and a band pass filter (BPF). The filter 130 may also include an analog filter and may include a digital filter as described below.

Referring to FIG. 2, the at least one filter 130 may receive the converted digital signal from the analog-to-digital converter 120 through the serial-to-parallel conversion unit 210. The detected digital signal may be output through the parallel-to-serial conversion unit 220. In general, a satellite signal transmitting data may include a serial signal, and a processing signal of an information processing apparatus such as a digital filter may include a parallel signal. Accordingly, the serial-to-parallel conversion unit 210 may convert a satellite signal, which is a serial signal, into a parallel signal so as to process data in the at least one filter 130. In addition, the parallel-to-serial conversion unit 220 may convert the parallel signal back to a serial signal to transmit the processed data from the filter 130.

On the other hand, the number of filters 130 can be calculated based on the frequency variation range of the intermediate signal and the conversion frequency interval of the frequency conversion unit 110. [ More specifically, the number of filters 130 can be calculated by Equation (1) below.

&Quot; (1) "

은 필터(130)의 개수)(

The number of filters 130)

The frequency fluctuation range of the intermediate signal can be changed according to the device transmitting the satellite signal, and the frequency fluctuation range of the intermediate signal can be in accordance with the standard provided by the company that operates the satellite. More specifically, the frequency of the satellite signal may vary depending on the performance of the satellite transmitting the satellite signal and external factors. Accordingly, a company operating a satellite can provide specifications for the frequency range of the intermediate signal in consideration of the performance of the satellite and external factors.

kHz로 변동될 수 있다. 이 때, 중간신호의 주파수 변동범위는 20kHz일 수 있다. 한편, 주파수 변환부(110)의 변환 주파수간격은 주파수를 동기화 하는데 있어서, 주파수를 선택하는 최소 단위를 포함할 수 있고, 위상동기루프의 동기 스텝(PLL step)을 포함할 수 있다. 예를 들어, 위성신호의 위상을 최소 1kHz의 단위로 동기화 시킬 수 있다.For example, the frequency of the intermediate signal provided by the satellite operating company is based on the frequency of the intermediate signal

kHz. At this time, the frequency variation range of the intermediate signal may be 20 kHz. Meanwhile, the conversion frequency interval of the frequency converter 110 may include a minimum unit for selecting a frequency in synchronizing the frequency, and may include a PLL step of the phase-locked loop. For example, the phase of the satellite signal can be synchronized in units of at least 1 kHz.

로 계산하여 필터(130)의 개수 N은 21개일 수 있다. 다시 도 2를 참조하면 21개의 필터(130)는 병렬로 배열될 수 있다. 이에 따라, 필터1 내지 필터21은 디지털 신호를 동시에 입력 받아 각각의 필터(130)의 통과 대역 주파수에 해당하는 디지털 신호를 동시에 검출할 수 있다.At this time, the number of the filters 130 is calculated using Equation (1)

The number N of the filters 130 may be 21. Referring again to FIG. 2, the 21 filters 130 may be arranged in parallel. Accordingly, the filters 1 to 21 can simultaneously receive the digital signals and detect the digital signals corresponding to the passband frequencies of the respective filters 130 at the same time.

Referring to FIG. 3, one or more filters 130 may include a first filter as a bandpass filter whose center frequency is the frequency of the intermediate signal. The one or more filters 130 may also include a second filter as a band-pass filter whose center frequency is the frequency at which the center frequency subtracts or adds a multiple of the conversion frequency interval from the frequency of the intermediate signal. On the other hand, the frequency and the conversion frequency interval of the intermediate signal may be the same as those described above.

)를 포함할 수 있다. 또한, 중간신호의 주파수보다 낮은 주파수 변동범위에서, 제2 필터의 중심주파수는 중간신호의 주파수에 변환 주파수간격의 배수를 감산한 주파수(

)를 포함할 수 있다. In a frequency variation range higher than the frequency of the intermediate signal, the center frequency of the second filter is a frequency obtained by adding a multiple of the conversion frequency interval to the frequency of the intermediate signal

). Further, in a frequency variation range lower than the frequency of the intermediate signal, the center frequency of the second filter is a frequency obtained by subtracting a multiple of the conversion frequency interval from the frequency of the intermediate signal

).

의 주파수를 중심주파수로 하고, 제1 필터는

를 중심주파수로 할 수 있다. 이에 따라, 하나 이상의 필터(130)의 중심주파수는 중간신호의 주파수 변동범위를 일정한 간격으로 분할할 수 있다.Referring again to Figure 3, the second filter

The center frequency of the first filter is

As a center frequency. Accordingly, the center frequency of the one or more filters 130 can divide the frequency variation range of the intermediate signal at regular intervals.

On the other hand, the bandwidth of the filter 130 can be set based on the carrier-to-noise ratio and the minimum set noise ratio of the satellite signal. More specifically, the bandwidth of the filter 130 can be set by Equation (2) below.

&Quot; (2) "

는 필터(130)의 대역폭,

는 위성신호의 반송파 대 잡음 비 및

은 최소 설정 잡음 비)(

The bandwidth of the filter 130,

The carrier-to-noise ratio of the satellite signal and

Is the minimum set noise ratio)

The bandwidth of the filter 130 may include a frequency width between two points where the gain of the filter 130 in the frequency characteristic is 3 dB lower than its maximum value. For example, the bandwidth in a bandpass filter may include a range of pass frequencies through which the filter 130 passes. On the other hand, the carrier wave may be a reference waveform used for modulating the data signal, and the frequency of the carrier wave may be higher than the data signal in general.

Also, the carrier-to-noise ratio may be a ratio of the carrier magnitude to the noise magnitude in transmitting satellite signals. More specifically, the carrier-to-noise ratio can be calculated based on the path loss (L) of the satellite signal, and the path loss (L) of the satellite signal can be calculated by Equation Can be calculated by Equation (4).

&Quot; (3) "

는 위성신호의 파장)(L is the path loss, R is the distance from the satellite,

Is the wavelength of the satellite signal)

&Quot; (4) "

(L is the path loss, F is the frequency of the satellite signal, and R is the distance from the satellite)

)를 산출할 수 있다.On the other hand, by substituting the calculated path loss L into Equation (5) below, the carrier-to-noise ratio (

) Can be calculated.

Equation (5)

는 반송파 대 잡음 비,

는 위성신호의 출력, L은 경로손실,

는 강우감쇠,

는 지상국의

)(

Carrier-to-noise ratio,

The output of the satellite signal, L the path loss,

Rainfall attenuation,

Of the ground station

)

)은 해당 위성신호를 송신하는 송신단에서의 출력일 수 있고, 지상국의

(

)는 지상국의 수신 주파수에 대한 안테나 이득과 수신계의 잡음온도의 비일 수 있다. 한편, 강우감쇠(

)는 강우에 의한 전파의 감쇠로 강우량, 위성신호의 주파수 등에 의해 결정될 수 있다.Output of satellite signals (

) May be an output from a transmitting terminal that transmits the satellite signal,

(

) May be a ratio of the antenna gain to the receiving frequency of the ground station to the noise temperature of the receiving system. On the other hand,

) Can be determined by the amount of rainfall, the frequency of the satellite signal, or the like due to attenuation of radio waves due to rainfall.

)는 수신된 위성신호를 검출하기 위해 필요한 최소 반송파 대 잡음 비를 포함할 수 있고, 최소 설정 잡음 비(

)는 경로손실(L), 강우감쇠(

), 주변 잡음 등의 영향을 고려하여 설정될 수 있다. 반송파 대 잡음 비(

), 최소 설정 잡음 비(

) 및 필터(130)의 대역폭(

)은 하기의 <수학식 6>의 관계를 가질 수 있다.Minimum set noise ratio (

) May include the minimum carrier-to-noise ratio needed to detect the received satellite signal, and the minimum set noise ratio (

) Is the path loss (L), rain attenuation (

), Ambient noise, and the like. Carrier to Noise Ratio (

), Minimum set noise ratio (

) And the bandwidth of the filter 130 (

) Can have the following relationship of &quot; (6) &quot;

&Quot; (6) &quot;

)에 관해 정리하면 상술한 <수학식2>가 도출될 수 있다.Equation (6) is used to determine the bandwidth of the filter 130

(2) < / RTI > can be derived.

)를 조절하여 필터(130)의 대역폭이 상호 중첩되게 할 수 있다. 예를 들어, 중간신호의 주파수는 21.4MHz이고, 변환 주파수간격은 1kHz이며 상술한 <수학식 5>에 의해 산출된 반송파 대 잡음 비(

)는 약 36dB일 수 있다. 이 때, 사용자는 최소 설정 잡음 비(

)를 5dB로 설정할 수 있고, 상술한 <수학식 2>에 의해 산출된 필터(130)의 대역폭(

)은 1250kHz일 수 있다. 필터(130)의 대역폭(

)이 1250kHz이면 각 필터(130)의 대역폭은 0.25kHz 상호 중첩될 수 있다. 이에 따라, 위성신호 주파수의 변동이 발생하더라도 주파수 변동범위 전체에서 위성신호를 검출할 수 있다.The user sets the minimum set noise ratio (

So that the bandwidths of the filters 130 overlap each other. For example, the frequency of the intermediate signal is 21.4 MHz, the conversion frequency interval is 1 kHz, and the carrier-to-noise ratio calculated by Equation (5)

) May be about 36 dB. At this time, the user sets the minimum set noise ratio (

) Can be set to 5 dB, and the bandwidth of the filter 130 calculated by Equation (2)

) May be 1250 kHz. The bandwidth of the filter 130 (

) Is 1250 kHz, the bandwidth of each filter 130 may be superimposed on each other by 0.25 kHz. Thus, even when the satellite signal frequency fluctuates, the satellite signal can be detected over the entire frequency variation range.

4 is a diagram illustrating a state in which a transmitter / receiver 150 according to an exemplary embodiment of the present invention transmits a control signal to an antenna controller 430 for controlling the direction of an antenna 420. Referring to FIG. The measuring unit 140 and the transceiver unit 150 will be described in detail with reference to FIGS. 1 and 4. FIG.

The measuring unit 140 may measure the magnitude of the digital signal detected by the filter 130 according to an embodiment of the present invention. The measurement unit 140 may include a power meter that measures the power of the digital signal. In addition, the measuring unit 140 can calculate the signal-to-noise ratio of the satellite signal by measuring the power of the digital signal and the power of the noise. Here, the signal-to-noise ratio may be the ratio of the magnitude of the signal to the amount of noise that interferes with it in transmitting the signal. More specifically, the signal-to-noise ratio can be calculated by Equation (7) below.

&Quot; (7) &quot;

은 신호 대 잡음 비,

은 디지털 신호의 전력,

는 노이즈의 전력)(

The signal-to-noise ratio,

The power of the digital signal,

The power of noise)

Referring to FIG. 4, a satellite signal transmitted from satellite 410 may be received at antenna 420. At this time, the measuring unit 140 can generate a control signal for controlling the direction of the antenna 420 based on the calculated signal-to-noise ratio. Here, the control signal may include a signal for controlling the direction of the antenna 420 to be equal to the direction in which the signal-to-noise ratio is maximum. More specifically, the control signal may include direction information that has a maximum signal-to-noise ratio, and may include a signal that drives all the processes required for direction control of the antenna 420. [

The transmitter / receiver 150 according to an embodiment of the present invention can transmit a control signal to the antenna controller 430, which controls the direction of the antenna 420. Referring again to FIG. 4, the transceiver unit 150 may use wireless communication to communicate with the antenna controller 430. The transmission / reception unit 150 and the antenna control unit 430 may share an internet server or a cloud server based on Internet Of Things (IOT). Meanwhile, the antenna controller 430 may include an antenna control unit (ACU) for attitude control of the satellite antenna 420.

5 is a graph showing a waveform of a satellite signal according to an embodiment of the present invention. FIG. 6 is a graph illustrating the filter response of a filter 130 arranged in a transform frequency interval according to an embodiment of the present invention. 7 is a graph illustrating the magnitude and signal-to-noise ratio of a satellite signal according to an embodiment of the present invention. Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 1, FIG. 5 to FIG.

Referring to FIG. 5, the beacon signal received from the antenna 420 in the range of 1750.23 MHz to 1750.26 MHz shows the size of the satellite signal. Analyzing the received satellite signal with a spectrum analyzer can measure -69dBm in size and 14.8dB signal-to-noise ratio. In this case, the frequency converter 110 according to an embodiment of the present invention may convert the satellite signal into a conversion frequency interval of 1 kHz to generate an intermediate signal having a frequency of 21.4 MHz. The conversion frequency interval may include a frequency synchronization interval (PLL step) of the phase-locked loop.

10kHz일 때 필터(130)의 개수(N)는

개일 수 있다. 한편, 최소 설정 잡음 비를 5dB로 설정함으로써, 필터(130)의 대역폭은 1250Hz일 수 있다. 하나 이상의 필터(130)는 중심주파수가 21.4MHz인 제1 필터와 중심주파수가 21.4MHz로부터 변환 주파수간격인 1kHz의 배수를 감산 또는 가산한 21.390MHz, 21.391MHz, 21.392MHz

21.410MHz인 제2 필터를 포함할 수 있다. 이 때, 각 필터(130)의 대역폭은 0.25kHz 상호 중첩될 수 있다. 이에 따라, 위성신호 주파수의 변동이 발생하더라도 주파수 변동범위 전체(21.390MHz ~ 21.410MHz)에서 위성신호를 검출할 수 있다.Referring to FIG. 6, the frequency variation range of the intermediate signal is determined based on the frequency of the intermediate signal

The number N of filters 130 at 10 kHz is

. On the other hand, by setting the minimum set noise ratio to 5 dB, the bandwidth of the filter 130 may be 1250 Hz. The at least one filter 130 includes a first filter having a center frequency of 21.4 MHz and a second filter having a center frequency of 21.4 MHz, 21.391 MHz, 21.392 MHz,

And a second filter of 21.410 MHz. At this time, the bandwidth of each filter 130 may be superimposed on each other by 0.25 kHz. Accordingly, even when the satellite signal frequency fluctuates, the satellite signal can be detected in the entire frequency variation range (21.390 MHz to 21.410 MHz).

7, the measuring unit 140 can measure the size of the satellite signal detected from the 21 filters 130. The size of the satellite signal is -69 dBm at an error of 0.5 dBm or less from the value measured by the spectrum analyzer. &Lt; / RTI &gt; Also, the measuring unit 140 can calculate the signal-to-noise ratio based on the size of the satellite signal, and the signal-to-noise ratio can be measured to be -14.8 dB within 0.5 dB of the error measured by the spectrum analyzer.

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, But the present invention is not limited thereto.

Claims (8)

A frequency converter for converting a frequency of a satellite signal to generate an intermediate signal;
An analog-to-digital converter for converting the intermediate signal into a digital signal;
At least one filter for detecting the converted digital signal; And
And a measuring unit for measuring a magnitude of the detected digital signal,
Wherein the number of the filters is calculated based on a frequency variation range of the intermediate signal and a conversion frequency interval of the frequency conversion unit,
The number of the filters is calculated by Equation (1) below,
&Quot; (1) &quot;

(

The number of the filters)
Wherein the conversion frequency interval is a minimum frequency unit for selecting the frequency of the intermediate signal within the frequency variation range,
Wherein the bandwidth of the filter is set based on a carrier-to-noise ratio and a minimum set noise ratio of the satellite signal,
The minimum set noise ratio is set such that the bandwidth of each filter overlaps the bandwidth of the adjacent filter
A device for detecting satellite signals in a filter array system.
The method according to claim 1,
The one or more filters
A first filter whose center frequency is the frequency of the intermediate signal; And
Wherein the center frequency is a frequency obtained by subtracting or adding a multiple of the conversion frequency interval from the frequency of the intermediate signal
A device for detecting satellite signals in a filter array system.
delete delete The method according to claim 1,
The bandwidth of the filter is
Is set by the following Equation (2)
A device for detecting satellite signals in a filter array system.
&Quot; (2) &quot;

(

The bandwidth of the filter,

The carrier-to-noise ratio of the satellite signal and

Is the minimum set noise ratio)
The method according to claim 1,
The satellite signal is received at an antenna,
The measuring unit
And generates a control signal for controlling the direction of the antenna based on the detected signal-to-noise ratio of the digital signal
A satellite signal detection device of a filter arrangement type
The method according to claim 6,
And a transmission / reception unit for transmitting the control signal to an antenna control unit for controlling the direction of the antenna
A device for detecting satellite signals in a filter array system.
The method according to claim 6,
The control signal
And a signal for controlling the direction of the antenna to be equal to the direction in which the signal-to-noise ratio is maximum
A device for detecting satellite signals in a filter array system.

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