KR100599611B1 - A system and method discriminating a target satellite from a plurality of satellites in satellite antenna - Google Patents

Abstract

The present invention relates to an apparatus and method for satellite identification of a satellite antenna, comprising: providing a processor having a counter function and a predetermined memory means in a satellite antenna to store satellite signals received by the satellite antenna including address information in the memory means; The present invention provides a satellite identification apparatus and method for tracking a target satellite more quickly and accurately by implementing a satellite identification method based on hardware that extracts data about satellite information from stored memory to identify a target satellite. For the purpose of

The satellite identification device of the satellite antenna according to the present invention receives a clock signal output from a decoder that decodes the first satellite signal introduced through the satellite antenna into a second satellite signal, and counts a counting signal corresponding to the clock signal. A counter unit for generating; A storage unit which stores the second satellite signal received from the decoder unit and stores the counting signal as memory address information of the second satellite signal; Satellite information for accessing the storage unit to detect satellite information identification signals of the second satellite signals, and extracting satellite information signals corresponding to address information spaced by a predetermined value from the address information of the detected satellite information identification signals. A signal extractor; And a main controller operative to control the directing direction of the satellite antenna using the extracted satellite information signal.

According to the satellite identification apparatus and method of the satellite antenna according to the present invention, a processor having a counter function and a predetermined memory means are installed in the satellite antenna to store the satellite signal received by the satellite antenna including address information in the memory means. In addition, by implementing the hardware identification method based on the hardware to extract the satellite information from the stored memory to identify the target satellite, it is possible to obtain the effect that can identify the target satellite more quickly and accurately.

Satellite antenna, satellite identification, DVB, satellite tracking

Description

Satellite identification device and satellite identification method of satellite antenna {A SYSTEM AND METHOD DISCRIMINATING A TARGET SATELLITE FROM A PLURALITY OF SATELLITES IN SATELLITE ANTENNA}

1 is a diagram illustrating a packet structure of an MPEG-2 transport stream according to the present invention.

2A illustrates the overall structure of an elementary stream (ES) in an MPEG-2 transport stream according to the present invention.

2B illustrates an interface signal of a QPSK / FEC decoder unit according to the present invention.

Figure 3 is a block diagram showing the overall configuration of a satellite tracking antenna system including a satellite identification device of the present invention.

4 is a block diagram showing an outline of a configuration of a satellite tracking antenna system including a satellite identification device according to the present invention;

5 is a block diagram showing the structure of a memory-storage satellite identification device according to an embodiment of the present invention.

6 is a flowchart illustrating a memory-stored satellite identification method according to FIG. 5;

7 is a block diagram showing the structure of a register-type satellite identification device according to an embodiment of the present invention.

8 is a flow chart illustrating a register satellite identification method according to FIG.

9 is a diagram showing an application example of a satellite identification method according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

510: decoder unit 520: counter unit

530: storage unit 540: satellite information signal extraction unit

550: main controller

The present invention relates to a satellite identification device and a satellite identification method of a satellite antenna, and more particularly, to configure a satellite identification device capable of identifying a target satellite signal to a satellite antenna, and broadcast in a DVB (Digital Video Broadcasting) format. The present invention relates to a satellite identification apparatus and method that can identify whether a satellite antenna is directed to a satellite to be tracked by extracting information of a unique ID assigned to each satellite in a satellite broadcast.

Recently, we are experiencing a remarkable change called the IT revolution. In the field of telecommunications, the rapid spread of the Internet and mobile communication and the high speed and large capacity of the telecommunication network are progressing, and in the field of broadcasting, digital terrestrial TV broadcasting and digital satellite broadcasting since 2002. With this beginning, we are entering the era of full-fledged digital broadcasting. Digital broadcasting has begun in many countries, including the United Kingdom, the United States, Sweden, Spain, and Australia, and the world has already entered the era of media transformation in the age of digital broadcasting. The impact of digital broadcasting on people's lives, broadcasting industry and national economy is very large, and the conversion of analog broadcasting to digital broadcasting has greatly improved the convenience of viewers. Through digital broadcasting, viewers are exposed to dramatically improved image quality and sound quality not seen in conventional analog broadcasting, and broadcasters are finding even more new business opportunities.

Digitalization has allowed broadcasters to offer even more channels in the same frequency band, and to provide interactive services combined with the Internet. In terms of informatization, the digitalized broadcasting network plays an important role as the information infrastructure of the knowledge and information society in the 21st century along with the communication network, and the smart TV will be fiercely contested with the PC for the home server. In terms of the use of radio resources, digitalization of broadcasting will maximize the efficiency of use of radio resources, which are finite and valuable shared resources. Many changes are taking place in terms of industrial structure and national economy. Due to digitalization, the conventional terrestrial-oriented monopolistic market is transforming into a fiercely competitive market among media, which leads to strengthening the competitiveness of the broadcasting service industry and increasing viewer welfare. In addition to the broadcasting service industry, it contributes to the growth of the national economy by increasing production and creating new jobs in related industries such as broadcasting equipment, software and contents. As a result, developed countries are making great efforts to use digital conversion of broadcasting as a strategic opportunity for national development.

As the satellite broadcasting market grows, research and development of satellite antennas for receiving satellite broadcasting are also continuing to develop. In order to receive a high frequency satellite broadcast signal in a high frequency band, the satellite antenna must always maintain an optimal position and orientation for the satellite that is the source of the signal. In order to watch various satellite broadcasts with one satellite antenna at the current location, the direction of the satellite antenna should be changed in the direction of the satellite transmitting each satellite broadcast. For this purpose, the satellites set by the user are automatically searched and the location information is stored. In the meantime, a device for rotating an antenna with a corresponding satellite when a channel is selected has been developed.

In order to overcome such a problem, a satellite broadcast signal is received by identifying a target satellite signal by identifying NID (Network ID), which is a satellite information signal of an MPEG-2 transport stream of a satellite signal, in a DVB-s method. In the existing satellite signal identification method, a method of searching for an NID and searching for a satellite signal is not implemented in the satellite antenna itself, but in a terminal outside a satellite antenna such as a set top box. Since the broadcast viewer searches for the position of the satellite when selecting a satellite channel, the procedure and implementation are difficult, and there are problems such as slow operation, inaccuracy, and frequent delay. In addition, there is a problem that satellite antennas that receive satellite signals received in the same frequency band although they are different channels cannot determine whether the received satellite signals are signals transmitted from a target satellite and thus are not efficient.

 The present invention has been made to improve the prior art as described above, by installing a processor having a counter function and a predetermined memory means in the satellite antenna to store the satellite signal received by the satellite antenna including address information in the memory means To provide a satellite identification device and method for tracking a target satellite more quickly and accurately by implementing a hardware-based satellite identification method for identifying a target satellite by extracting data about the satellite information from the stored memory. The purpose.

In addition, the satellite identification device and method according to the present invention, the first comparator for detecting the satellite information identification signal from the satellite signal received from the satellite, and the satellite according to the storage command of the counting signal according to the detected satellite information identification signal By identifying the satellites by storing the information signal in a predetermined register, it is possible to implement a satellite identification device with a simple configuration without using memory. Since the last received satellite identification signal is stored in the register, the register value is read. It is an object of the present invention to provide a more efficient satellite identification apparatus and method capable of performing satellite identification operations only by operation.

In addition, the satellite identification apparatus and method according to the present invention, by maintaining the absolute coordinate value of the stationary satellite and the relative coordinate value between the satellites that the satellite antenna transmits the satellite broadcast signal, by receiving only the satellite signal to extract and detect satellite information Another object of the present invention is to provide a satellite identification device and a method for tracking a target satellite more quickly and accurately even in a moving satellite antenna whose position changes frequently.

In order to achieve the above object and solve the problems of the prior art, the satellite identification device of the satellite antenna according to the present invention, the clock output from the decoder unit for decoding the first satellite signal introduced through the satellite antenna into a second satellite signal A counter unit for receiving a signal and generating a counting signal corresponding to the clock signal; A storage unit which stores the second satellite signal received from the decoder unit and stores the counting signal as memory address information of the second satellite signal; Satellite information for accessing the storage unit to detect satellite information identification signals of the second satellite signals, and extracting satellite information signals corresponding to address information spaced by a predetermined value from the address information of the detected satellite information identification signals. A signal extractor; And a main controller operative to control the directing direction of the satellite antenna using the extracted satellite information signal.

In addition, the satellite identification device of the satellite antenna according to the present invention, receiving a clock signal output from the decoder for decoding the first satellite signal introduced through the satellite antenna to the second satellite signal, and counting corresponding to the clock signal A counter unit for generating a signal; Comparing the second satellite signal received from the decoder and the bit string corresponding to the satellite information identification signal, detects a bit string identical to the bit string in the second satellite signal and outputs a counter reset signal to the counter unit. A first comparator; A second comparator for outputting a stored signal when a counting signal spaced apart by a predetermined interval is detected from the counting signal output from the counter in response to the counter reset signal output from the first comparator; A register unit for receiving the storage signal output from the second comparator and storing the second satellite signal output from the decoder unit; A satellite information signal extractor for accessing the register to extract the stored second satellite signal as a satellite information signal; And a main controller operative to control the directing direction of the satellite antenna using the extracted satellite information signal.

The MPEG-2 transport stream mainly referred to in the present invention is a file transmission method used in the DVB-s (Digital Video Broadcasting) group format, which is a satellite broadcast protocol. Moving Picture Experts Group (MPEG-2) (ISO / IEC 13818) is an extension of MPEG-1 and was created to provide high quality video encoding techniques that can be transmitted over computer networks. MPEG-2 is also the preferred compressor for transmitting video over ATM networks. The standardization work has been carried out with the aim of realizing the improvement of broadcasting quality. Recently standardized, MPEG-2 has been developed for digital satellite broadcasting (including DBS through the Korean satellite), high-definition TV (HDTV), and digital video disc. (DVD), video-on-demand (VOD), and many others have been adopted and are the driving force behind the multimedia revolution.

The MPEG-2 system adopts a packet multiplexing scheme used in time division multiplexing (TDM). At this time, each of the video and audio bit streams is first divided into a packetized elementary stream (PES) of appropriate length called a packet. PES packets have an upper limit of 64 KB in length to accommodate a variety of applications, and can take either fixed length or variable length for each packet. Variable transmission rates are also allowed and discontinuous transmission is possible. Each PES is multiplexed into one bit string to form a PS or a TS. Packet length is highly dependent on the transport channel or medium. Since the first 4 bytes of each TS packet are for the header, the remaining 184 bytes are the user information portion that transmits the actual video or audio. In many applications, the code for error correction is added, and the length of the TS packet is determined in consideration of this.

Synchronization information is added to the MPEG-2 system layer, which is processed using time stamps. The time stamp includes a decoding time stamp and a presentation time stamp, which are included in the PES packet header. Synchronization between the encoder and the decoder uses a program clock reference (PCR).

1 is a diagram illustrating a packet structure of an MPEG-2 transport stream according to the present invention.

According to FIG. 1, DVB broadcasts satellite broadcasts in MPEG-2 format, and satellite signal data obtained from a tuner unit is composed of repetitive packetized elementary streams (PES). The PES consists of header information and repetitive ES (Elementary Stream), and the header consists of 3 bytes of Start code, 1 byte of Stream ID, and 2 bytes of PES length. Each ES also consists of a header of 4 bytes, a payload of 184 bytes, and an RS code of 16 bytes.

Each ES is composed of a header, a payload, and an RS code. The header information of the ES has information indicating what format the payload information has. This information is stored in the PID (Packet Identifier) of the header. If this value is 64, the payload data is audio information, if it is 51, it is video information. If the format is 0x010, it is a satellite information identification signal (NIT). Represent information. As such, when the payload having satellite information is transmitted, the PID value is set to NIT (Network Information Table: 0x010), and when the value is transmitted, the satellite identification information is extracted by analyzing the payload value.

FIG. 2A illustrates the overall structure of an elementary stream (ES) in an MPEG-2 transport stream according to the present invention.

According to FIG. 2A, when the PID is set to NIT and transmitted, the payload is transmitted in the format as shown in FIG. 3, and the Network ID information is extracted from the determined location. Since this information has unique ID information of the satellite, it can be used to determine which satellite the satellite is directed to. In the structure of the ES, the PID including the satellite information identification signal NIT is located in the 3-byte header and the satellite information signal NID is located in the 5-6 bytes, and the satellite information signal is obtained from the satellite information identification signal. It is characterized in that spaced by one byte size.

2B is a diagram illustrating an interface signal of a QPSK / FEC decoder unit according to the present invention.

According to FIG. 2B, a general QPSK / FEC module is interfaced through a data signal and a clock signal. This means that one byte of data is delivered every clock. Accordingly, in order to store a series of data in a memory, different address signals are generated and stored in a memory each time the clock is increased, and data of satellite information is compared and extracted from the stored memory. Such a method may be implemented using an IC and a RAM having a counter function. Alternatively, the method may be implemented using a field programmable gate array (FPGA) having a memory.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the satellite identification device and satellite identification method of the satellite antenna according to the present invention will be described in detail.

3 is a block diagram showing the overall configuration of a satellite tracking antenna system including a satellite identification device of the present invention.

Referring to FIG. 3, the satellite tracking antenna system according to an exemplary embodiment of the present invention may reflect the satellite signal reflected from the reflector plate 310 and the reflector plate 310 to receive a predetermined satellite signal in the direction of a target satellite. The sub-reflection plate 320 focusing on the incoming waveguide 340 and the sub-reflection plate rotating part installed at the sub-reflection plate 320 to rotate the sub-reflection plate 320 at high speed for measuring the rotation period and the absolute position measuring bar 321. 330, the detection means 331 installed in the sub-reflection plate rotating unit 330 to generate an interrupt signal each time the absolute position measuring bar 321 passes, and shaping the satellite signal beam focused on the sub-reflection plate 320. a dielectric lens 341 shaping) and an incoming waveguide 340 which receives the satellite signal beams shaped through the dielectric lens 341 and transmits them to the satellite signal unit 360, and moves the position of the reflector plate 310. Drive reflector At the stage 350, the azimuth motor 351 for moving the reflector 310 in the azimuth (left, right) direction, the rotating plate 352 rotating in the azimuth direction in accordance with the rotation of the azimuth motor 351, and the reflector 310 ), Driven by the belt 355 while the driving pulley 354 rotates in accordance with the rotation of the elevation motor 353 and the elevation motor 353 to move the elevation angle (up, down) direction. And an antenna controller 360 including a periodic control module, a reflector position / speed controller, and a satellite identification device, wherein the satellite signal received from the reflector 310 is transmitted through the incoming waveguide 340.

On the other hand, according to an embodiment of the present invention, the sub-reflection plate 320 is located at a position facing the reflecting plate 310, the sub-reflection plate 320 is rotated at high speed by the sub-reflection plate rotating part 330. Therefore, the satellite signal reflected by the elliptical reflector 310 is received by the sub-reflection plate 320 and reflected by the sub-reflection plate 320 to be focused to the incoming waveguide 340, and the focused satellite signal is a coaxial cable. The satellite identification device determines whether the satellite signal is a signal of a target satellite transmitted to the satellite identification device of the antenna controller 360 through the satellite signal. If the satellite signal is not the target satellite signal, the satellite identification device performs a series of operations according to the present invention and sends a predetermined control signal to the reflector position / speed control unit to direct the satellite to the target satellite. To control.

4 is a block diagram showing an outline of a configuration of a satellite tracking antenna system including a satellite identification device according to the present invention.

Referring to FIG. 4, the satellite tracking antenna system converts an antenna 480 for receiving a satellite signal and a satellite signal received from the antenna 480 into an easy-to-handle frequency (1 GHz band) and carries a carrier to noise power ratio (CNR). LNB 490 for securing a signal, a tuner 410 for receiving a specific satellite signal, and an A / D converter 420 for converting the first satellite signal selected by the tuner 410 into a digital signal. QPSK / FEC decoding unit 430 for demodulating and decoding the digitally converted first satellite signal and FEC (Forward Error Correction) decoding, and second satellite signal from QPSK / FEC decoding unit 430. Satellite identification device 440 for receiving and storing the satellite information signal to identify the target satellite signal, and receiving the target satellite information signal from the satellite identification device 440 to control the direction of the satellite antenna With main controller 450 and main controller 450 And a motor driving circuit 460 for receiving a control command to move the position of the satellite antenna, and a power supply unit 470 for supplying power to the motor driving circuit 460.

The QPSK / FEC decoding unit 430 demodulates the first satellite signal digitally converted by the A / D conversion unit 420 at a variable rate and performs a quadrature phase shift keying (QPSK), and the QPSK synchronization signal and S / N. A QPSK demodulator 431 for outputting a signal and an FEC decoder 432 for FEC decoding the demodulated first satellite signal and outputting a frame sync lock signal. The QPSK demodulator 431 controls the wideband signal to be a constant output by the tuner 410 (Wide Band AGC), and the digital signal input from the A / D converter 420 is constant in a predetermined narrow band. Control to narrow band AGC. In the present embodiment, the QPSK / FEC decoding unit 430 may be configured as one chip, and the AGC level is implemented by reading a corresponding register value.

5 is a block diagram showing the structure of a memory-storage satellite identification device according to an embodiment of the present invention.

The memory storage satellite identification apparatus of the satellite antenna according to FIG. 5 receives a clock signal output from the decoder 510 which decodes the first satellite signal introduced through the satellite antenna into a second satellite signal, and receives the clock signal. A counter unit 520 for generating a corresponding counting signal, and a storage unit storing the second satellite signal received from the decoder unit 510, and storing the counting signal as memory address information of the second satellite signal. 530 and accessing the storage unit 530 to detect the satellite information identification signal of the second satellite signal, the satellite information corresponding to the address information spaced by a predetermined value from the address information of the detected satellite information identification signal A satellite information signal extractor 540 for extracting a signal, and the direction of the satellite antenna is controlled using the extracted satellite information signal. Is composed of a master controller 550. The counter unit 520 may be implemented by a predetermined IC having a counting function, and the storage unit may be implemented by a predetermined RAM, which is a memory means, and has a field programmable gate array (FPGA) that incorporates memory in another method. ) May be implemented integrally.

6 is a flowchart illustrating a memory-stored satellite identification method according to FIG. 5.

According to the memory-stored satellite identification method of FIG. 6, which is a preferred embodiment of the present invention, the first satellite signal introduced through the satellite antenna is decoded into a second satellite signal (S610), and a clock signal of the second satellite signal is received. In operation 620, a counting signal corresponding to the clock signal is generated. The counting signal generated in step 620 generates address information which is storage location information to be stored in the storage means (S630), and stores the second satellite signal, and stores the counting signal as memory address information of the second satellite signal. (S640). In step 640, the NIT information, which is the satellite information identification signal, is detected in the MPEG-2 transport stream of the second satellite signal stored in operation 640. When the NIT information is detected, the NID information, which is the satellite information signal spaced one byte from the NIT, is detected. Extract (S660).

It is determined whether the satellite signal is transmitted from the target satellite through the satellite information signal extracted in step 660. If the satellite signal is not transmitted from the target satellite, the relative coordinates of the previously input satellite are searched. The directing direction of the satellite antenna is controlled (S670).

7 is a block diagram showing the structure of a register-type satellite identification device according to an embodiment of the present invention.

The register type satellite identification device of the satellite antenna according to FIG. 7 receives a clock signal output from a decoder 710 which decodes the first satellite signal introduced through the satellite antenna into a second satellite signal, and receives the clock signal. The counter unit 720 for generating a corresponding counting signal, the second satellite signal received from the decoder unit, and a bit string corresponding to the satellite information identification signal are compared to be equal to the bit string in the second satellite signal. A first comparator 730 that detects a bit string and outputs a counter reset signal to the counter unit, and the counting output from the counter unit 720 in response to the counter reset signal output from the first comparator 730. When a counting signal spaced apart from the signal by a predetermined interval is detected, the storage signal output from the second comparator 740 and the second comparator 740 for outputting a storage signal are stored. A register unit 740 for receiving and storing the second satellite signal output from the decoder unit 710 and a satellite information signal for accessing the register unit 740 to extract the stored second satellite signal as a satellite information signal. And an extractor 760 and a main controller 770 which operates to control the direction of the satellite antenna by using the extracted satellite information signal. This register-type satellite identification device configuration can be implemented in a simple logic configuration without using a memory. Since the satellite identification signal that was received last is always stored in the register unit 750, the master controller 770 uses a register value. The advantage of reading is that satellite identification can be performed. As a method of implementing such a configuration, a method using a simple microprocessor, a method using a GAL, a complex programmable logic device (CPLD), and a logic IC may be used.

8 is a flowchart illustrating a register satellite identification method according to FIG. 7.

In the register-type satellite identification method of FIG. 8 according to an embodiment of the present invention, the first satellite signal introduced through the satellite antenna is decoded into a second satellite signal (S810) and a clock signal of the second satellite signal is received. In operation S820, a counting signal corresponding to the clock signal is generated. The received second satellite signal is compared with a bit string corresponding to a satellite information identification signal of a satellite to be input in advance (S830), and the same bit string as the bit string is detected from the second satellite signal. (S831). A counter reset signal for the counting signal is output (S840), and corresponding to the counter reset signal, a counting signal spaced apart from the counting signal by a predetermined interval, that is, NIT information and one byte in the MPEG-2 transport stream. When the NID information spaced apart is detected, the storage signal is output (S850). The second satellite signal is stored in the register unit according to the stored signal (S860), and the stored second satellite signal is extracted as an NID which is a satellite information signal (S870). It is determined whether the satellite signal is transmitted from the target satellite through the satellite information signal extracted in step 870. If the satellite signal is not transmitted from the target satellite, the relative coordinates of the previously input satellite are searched. The directing direction of the satellite antenna is controlled (S670).

9 is a diagram showing an application of a satellite identification method according to an embodiment of the present invention.

The satellite antenna mounted on the moving object and receiving the satellite broadcast signal receives in advance the absolute coordinates of the stationary satellite having a fixed position by being located in the equator and having the same period as the rotation of the earth. When power is first applied to the satellite antenna to perform an operation, the satellite antenna rotates in a circle to scan signals of all satellites of satellite 1, satellite 2, satellite 3, satellite 4, and satellite 5.

Assuming that the user's target satellite is satellite 1 and that the current satellite antenna is directed to satellite 4, the satellite antenna receives the satellite signal transmitted from satellite 4 and receives the satellite signal through the satellite identification device according to the present invention. It is determined whether the signal of 4 is a target satellite signal. If it is determined that the signal of satellite 4 is not the target satellite signal, the satellite antenna compares the absolute coordinates (latitude and longitude) of satellite 4 that have been input in advance with the absolute coordinates (latitude and longitude) of the target satellite 1, Find the relative coordinate distance between satellite 4 and satellite 1. The satellite antenna rotates in the direction of satellite 1 according to the relative coordinate distance value, thereby receiving satellite signals in the direction of satellite 1, which is a target satellite.

Embodiments of the invention also include computer-readable media containing program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The medium or program instructions may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

According to a satellite identification device and method of a satellite antenna according to the present invention, a processor having a counter function and a predetermined memory means are installed in a satellite antenna to store satellite signals received by the satellite antenna including address information in the memory means, By implementing the hardware identification method based on the hardware to extract the satellite information from the stored memory to identify the target satellite, it is possible to obtain the effect of identifying the target satellite more quickly and accurately.

In addition, according to the satellite identification apparatus and method of the satellite antenna according to the present invention, the first comparator for detecting the satellite information identification signal from the satellite signal received from the satellite, and the storage of the counting signal according to the detected satellite information identification signal By identifying the satellites by storing the satellite information signal in a predetermined register according to the command, it is possible to implement the satellite identification device with a simple configuration without using a memory, and because the satellite identification signal that was received last is always stored in the register The satellite identification operation can be performed only by reading the value, thereby obtaining the effect of identifying the satellite more efficiently.

In addition, according to the satellite identification apparatus and method of a satellite antenna according to the present invention, the satellite antenna maintains the absolute coordinate value of the stationary satellite and the relative coordinate value between the satellites, and transmits satellite information only by receiving the satellite signal By extracting and detecting, a moving satellite antenna whose position changes from time to time can achieve the effect of tracking the target satellite faster and more accurately.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

Claims (9)

delete In a satellite antenna system, A counter unit for receiving a clock signal output from a decoder that decodes the first satellite signal introduced through the satellite antenna into a second satellite signal and generating a counting signal corresponding to the clock signal, wherein the second satellite signal The decoder unit decodes the first satellite signal; The second satellite signal received from the decoder unit compares the bit string corresponding to the satellite information identification signal, detects the same bit string as the bit string in the second satellite signal, and generates a counter reset signal for the counter unit. An output first comparator; A second comparator for outputting a stored signal when a counting signal spaced apart by a predetermined interval is detected from the counting signal output from the counter in response to the counter reset signal output from the first comparator; A register unit for receiving the storage signal output from the second comparator and storing the second satellite signal output from the decoder unit; And A satellite information signal extractor for accessing the register to extract the stored second satellite signal as a satellite information signal Including, And the satellite antenna includes a main controller operative to control the directing direction of the satellite antenna using the extracted satellite information signal. The method of claim 2, The satellite signal is a satellite identification device, characterized in that the satellite signal of the MPEG-2 format according to the DVB (Digital Video Broadcasting) satellite broadcasting protocol. The method of claim 2, The satellite information identification signal is a MPEG-2 transport stream, characterized in that the PID (Packet Identifier) included in the header of the ES (Elementary Stream) is NIT (Network Information Table) information, And the satellite information signal is a network identifier included in a payload of an elementary stream (ES) in an MPEG-2 transport stream. The method of claim 2, The satellite identification device further comprises satellite coordinate storage means for recording one or more satellite position coordinates, The main controller identifies the satellite using the satellite information signal extracted by the satellite information signal extracting unit, calculates a relative coordinate value of the target satellite corresponding to the satellite with reference to the satellite coordinate storing means, and the satellite And controlling the antenna to move by the calculated relative coordinate value. delete A method for identifying a target satellite in a satellite antenna, the method comprising: Generating a second satellite signal by decoding the first satellite signal introduced through the satellite antenna; Receiving a clock signal of the second satellite signal and generating a counting signal corresponding to the clock signal; Comparing the received second satellite signal with a bit string corresponding to the satellite information identification signal, and detecting a bit string identical to the bit string in the second satellite signal; Outputting a counter reset signal for the counting signal; In response to the counter reset signal, when a counting signal spaced apart from the counting signal by a predetermined interval is detected, outputting a storage signal; Receiving the output stored signal and storing the second satellite signal; And Extracting the stored second satellite signal into a satellite information signal; And Controlling the directing direction of the satellite antenna by using the extracted satellite information signal Satellite identification method comprising a. The method of claim 7, wherein Maintaining satellite coordinate storage means for recording the position coordinates of at least one satellite; Identifying the satellite using the extracted satellite information signal; Calculating a relative coordinate value of a target satellite corresponding to the satellite with reference to the satellite coordinate storing means; And Controlling the satellite antenna to be moved by the relative coordinate value Satellite identification method comprising a. A computer-readable recording medium having recorded thereon a program for executing the method of any one of claims 7 and 8.

Images