KR100977607B1 - Differential GPS Information Transmission System and Receiving System Utilizing T-DMB - Google Patents

Abstract

The present invention relates to a high-precision position information transmission system and a reception system utilizing terrestrial digital multimedia broadcasting (DMB) for correcting errors of several tens of meters due to the fifth dimension of a global positioning system (GPS) to several meters. .

To this end, the present invention formats and transmits the RTCM SC-104 code, which is the correction information for DGPS, to be suitable for the terrestrial DMB (T-DMB) method, which is received by the terminal and converted into an RTCM SC-104 compatible code to obtain a GPS error. In the high-precision location information transmission system capable of correcting the above, the format applies an extension 13 (FIG 0/13) of FIG. 11-bit user application type definition (b15-b5), 5-bit user application data length (b4-b0), and a data code (KDGPS_DMB data field) that is an integer multiple of 8 bits within 32 bytes. b15-b5 applies the code (00000000101) allocated for the DGPS of the ETSI 300 401 as it is, and b4-b0 indicates the length of the KDGPS_DMB data field in bytes, and the KDGPS_DMB data field has a 24-bit data head and 40 ratio 2 bits (30 bits / word) appearing at the head of the data field of KDGPS_DMB format and appearing at the beginning of all message formats defined in RTCM SC-104. Consists of 6-bit message type code, 13-bit message information reference time code, and 5-bit frame size code for KDGPS_DMB, and the 40-bit data codes are required for transmitting KDGPS_DMB information provided by RTCM SC-104. Data are abbreviated as 1 and 2, which are key error correction information, among the 40 bits of DGPS for each satellite provided by RTCM SC-104, and the precision is 0.02m in 16-bit PRC. In the 8-bit RRC, it is set to 0.002 m / s and encoded. The formatted correction information is a DGPS baud for correcting a GPS position error at a DGPS monitor station. Decode and correct the error information of the data receiver which transmits the RTCM SC-104 code, which is received in real time, and the GPS receiver positioning device that receives the position signal received from the satellite and the DGPS correction information received from the data receiver. And a data transmitter for receiving the data corrected by the DGPS correction decoder and the DGPS correction decoder and transmitting the data to the DMB receiver through the DMB transmission system.

GPS, Terrestrial, Terrestrial, DMB, Geolocation

Description

High Accuracy Location Information Transmission System and Receiving System Using Terrestrial DMB

The present invention relates to a high-precision positional information transmission system using terrestrial digital multimedia broadcasting (DMB), and in particular, to correct the error of up to several tens of meters due to the fifth dimension of the global positioning system (GPS) by several meters. The present invention relates to a high precision location information transmission system and a reception system using digital multimedia broadcasting (DMB).

With the development of satellite communication technology, GPS (Global Positioning System), which is a positioning system using satellites, has been developed, but the position coordinates acquired by the GPS receiver have errors up to 100 meters due to various zero-dimensional people such as SA (selectable availability). do. To overcome this error, various correction methods (DGPS: Differential GPS) are used. That is, the DGPS receiver receives the DGPS information through the downlink from the DGPS reference station by performing an uplink requesting the DGPS data to the DGPS reference station through a commercial wireless communication network, and then transmitting the DGPS information to the GPS receiver. Is authorized. Then, the GPS receiver corrects the error of up to several tens of meters existing by various fifth-order persons according to the DGPS information and corrects it to about one meter to indicate the exact position of the moving object.

In the case of the commercial wireless communication network used for such a correction method, a large number of relay base stations (Gap Fillers) are required to cover a large area with a small cell radius, and the frequency band is high from 800 MHz to several GHz, such as diffraction. Not only are the radio conduction characteristics weak, but most of the data must be transmitted 1: 1 or data broadcast using Short Message Service (SMS) .In this case, the amount of data that can be transmitted is limited, An uplink is required, which increases the cost of occupying the call channel.

Recently, in order to improve the above problems, the high-precision position correction information transmission method and transmission system and receiver using the Republic of Korea Patent No. 10-0570710 developed in accordance with the developed, the compatibility with the RTCM SC-104 code that is the correction information for DGPS There has been proposed a technique for performing position correction by encoding a format suitable for the FM DARC (Data Radio Channel) method having a decoding and decoding the same in a receiver.

However, the conventional FM DARC (Data Radio Channel) service uses a bandwidth of 16 kbps with 76 KHz as the center frequency. Therefore, compared with the service using a DMB broadcasting network capable of transmitting data up to 1.2 mbps quickly, The solvent efficiency drops significantly.

In addition, in the case of a system using the existing FM broadcast network is to be converted to digital in the future by the digitalization plan of the broadcast, there is still a problem in that it is required to secure alternative means for this.

Accordingly, the present invention has been made to solve the above problems, and by implementing the transmission of the correction information for DGPS using a terrestrial DMB (Digital Multimedia Broadcasting) broadcasting network, the technical quality compared to using other commercial wireless communication networks such as wireless data The purpose of the present invention is to provide a high-precision location information transmission system using terrestrial DMB, which improves and enables the use of DGPS services at low cost.

Another object is to provide a high-precision positional information receiving system utilizing terrestrial DMB that corrects the GPS error of up to several tens of meters by processing the positional correction data transmitted from the transmission system by the DMB receiver.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be apparent to those skilled in the art from the following description.

In order to achieve the above object, according to an aspect of the present invention, the RTCM SC-104 code, which is correction information for DGPS, is formatted to be suitable for a terrestrial DMB (T-DMB) scheme and transmitted, and the terminal receives the RTCM SC In a high-precision location information transmission system capable of correcting GPS errors of up to several tens of meters by converting to a -104 compatible code, the format (contents of the correction information data for DGPS) is used for supporting various application services. Fast Application Group Definition (FIG 0/13) of FIG. 0 (FIG 0/13), which specifies FIG. 11, applies 11-bit user application type definition (b15-b5) and 5-bit user application data length (b4-b0) and 32. It consists of a data sign (KDGPS_DMB data field) of an integer multiple of 8 bits within the byte size, b15-b5 applies the code (00000000101) allocated for DGPS of ETSI 300 401, and b4-b0 is KDGPS_DMB. Data field The length is expressed in bytes, and the KDGPS_DMB data field is composed of a 24-bit data head and a 40-bit data code. The 24-bit data head is located at the head of the data field in the KDGPS_DMB format. RTCM SC-104 In the two words (30 bits / word) that appear at the beginning of all message formats defined in, consists of a 6-bit message type code required for KDGPS_DMB, a 13-bit message information reference time code, and a 5-bit frame size code. The 40-bit data codes are six pieces of data necessary for transmitting the KDGPS_DMB information provided by the RTCM SC-104, and the number 1 error correction information, which is the core of the 40-bit DGPS information for each satellite, provided by the RTCM SC-104. And coded to abbreviate message 2, and wherein the formatted correction information is used to correct a GPS position error at the DGPS monitor station. Decodes the error information of the data receiver transmitting RTCM SC-104 code, which is the DGPS correction information, in real time, and the GPS receiver positioning device that receives the DGPSD correction information received from the data receiver and the position signal received from the satellite. And a data transmitter for receiving and correcting the DGPS correction decoder and the data corrected by the DGPS correction decoder and transmitting the data to the DMB receiver through the DMB transmission system. Can provide.

According to another aspect of the present invention, in the high-precision position information receiving system for correcting the position error of the GPS received by the DMB receiver according to the received correction information for DGPS, KDGPS_DMB scheme of the DMB additional broadcasting received through the DMB receiver The DGPS data decoder converts the correction information for DGPS into an RTCM SC-104 compatible code and transmits it to the DGPS receiving system, and the DGPS data decoder includes information of the RTCM SC-104 omitted from the data head among the correction information data for the KDGPS_DMB type DGPS. Are replaced by 0, and the first 8 bits of the preamble are replaced with 66hex defined in RTCM SC-104, and the information for each satellite provided by RTCM SC-104 omitted from the data code is replaced by 0. Each parity bit is coded through a parity check (hamming code) that detects and corrects errors by assuming an even number for the specified bit. And a GPS for receiving the GPS position signal received through the GPS receiving antenna and the DGPS correction information decoded through the DGPS data decoder, correcting the error of the GPS position signal, and outputting the corrected position data. It provides a high-precision location information receiving system using the terrestrial DMB characterized in that it further comprises a receiving positioning device.

According to the present invention, the following effects can be expected.

The present invention is expected to contribute to the improvement of vehicle navigation performance and activation of various applications such as location based service (LBS), geographic information system (GIS), telematics (TMS) by increasing location accuracy using GPS receiver.

In addition, as it uses the terrestrial DMB broadcasting system that provides broadcasting services to the metropolitan area in December 2005 and the whole country in 2007, the following expected effects can be additionally presented.

1) Prompt implementation of service: By using DMB network that broadcasts nationwide, it is possible to save enormous cost and time, and to implement prompt service such as securing / license separate transmission frequency or establishing transmission system.

2) Excellent data transmission quality: Terrestrial DMB occupies high quality VHF band, and transmits signal at high power from high-altitude transmission station, so the data transmission quality is excellent in service area.

3) Inexpensive service usage fee and terminal price: It is possible to add some data for DGPS service by using the already established DMB broadcasting network, so investment and operation cost are low. The receiver also adds a software decoding function to the existing DMB receivers in mass production, enabling smooth dissemination without an increase in terminal cost.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a diagram illustrating a structure of a transmission frame of a DMB for a high-precision positional information transmission system using a terrestrial DMB (T-DMB) according to the present invention, and FIG. 2 is a diagram of a terrestrial DMB (T-DMB) according to the present invention. 3 shows an example of a CIF (Common Interleaved Frame) structure for a high precision location information transmission system, and FIG. 3 is a KDGPS_DMB data packet for a high precision location information transmission system using a terrestrial DMB (T-DMB) according to the present invention. 4 is a schematic diagram showing a high-precision position information transmission system utilizing a terrestrial DMB (T-DMB) according to a preferred embodiment of the present invention, and FIG. 5 is a terrestrial DMB ( Each of the drawings schematically showing a high-precision location information receiving system utilizing T-DMB) is shown.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment according to the present invention.

First, the requirements for signal transmission for high precision position information (DGPS) are as follows. That is, (1) All the terminals in the receiving area should receive the signal without bottleneck without limiting simultaneous reception. (2) Correction information should be transmitted in the shortest period possible without the receiver's request. (If the transmission request is required every time the DGPS signal is received, it is inefficient due to reception delay and UP link communication cost.) (3) It should have as much service coverage and excellent data reception as possible. (4) Low usage fee and terminal price should be low. (5) In the case of the system using the existing FM broadcasting network, it will be converted to digital in the future according to the digitalization plan of the broadcasting, so it is required to secure an alternative means.

The above requirements can be satisfied as follows by using a terrestrial DMB (T-DMB) broadcasting system. That is, (1) There is no limit on the number of terminals that are simultaneously serviced: Unlike a communication, a broadcast has a function of [One to Multi Point], whereas a commercial wireless network transmits data one-to-one, Not suitable for transmitting data to many terminals at the same time] All receivers can simultaneously receive the same data without limiting the number of receivers using the service. (2) In general, when using a commercial wireless communication network, the corresponding data is transmitted by request of necessary data, whereas in the case of DMB broadcasting, when data is required, only the data being broadcast is received. Since no uplink is required, there is no time lag or communication charge. (3) DGPS data is preferably a wide service area because of its characteristics, it is possible to use the DMB broadcasting network in almost all nations, such as major cities. (4) DGPS data is often required to be received in mobile environments such as automobiles. Therefore, DGPS data must be effectively received even in mobile reception. Therefore, DMB broadcasting data has excellent reception performance at 200Km or more per hour.

Referring to Figures 1 to 5 will be described a high-precision location information transmission method using the terrestrial DMB (T-DMB) according to the present invention.

In the present invention, the RTCM SC-104 code information, which is the correction information for DGPS, is formatted to be suitable for a terrestrial DMB broadcasting system, and the received DMB receiver converts the RTCM SC-104 compatible code into an error of up to several tens of meters. This method is called KDGPS (KoreanDGPS) _DMB format.

Referring to FIG. 1, a transmission frame structure of a DMB for a high-precision position information transmission system using a terrestrial DMB (T-DMB) according to the present invention is described. It is divided into Fast Information Channel (MSC) and Main Service Channel (MSC). Normal video, audio, and data are transmitted using MSC. The FIC is a channel through which the receiver transmits information necessary for decoding in order to use a service desired by the user, such as various service information and content configuration information carried on the MSC. The FIC also uses a Fast Information Data Channel (FIDC). It is possible to transmit limited data.

In addition, data transmission protocols applicable to data transmission using the MSC include a transparent data channel (TDC), a multimedia object transfer (MOT), and an IP data diagram tunneling (IP data diagram). ). TDC is a data transfer protocol of DMB for data transmission in a stream manner, and is used for transmission of TPEG (Transport Protocol Experts Group) data of KBS. In addition, MOT is a method of transmitting data by object unit, and is used for TPEG data transmission of other DMB broadcasters such as MBC, YTNDMB except KBS. FIC offers more robust error correction and no time interleaving than MSC, so it has the advantage of higher reception and faster decoding than MSC, but it is not suitable for the transmission of large data such as video and audio.

However, data service using FIC is suitable for critical information service that requires urgent information. Data transmission using MSC channel consists of CIFs. One CIF is 55,296 bits, which corresponds to 864 Capacity Unit (CU) and is transmitted every 24ms. do.

Therefore, the present invention is inexpensive transmission by using a fast information channel (FIC) channel capable of high reception rate and fast decoding among DMB broadcasting systems capable of transmitting position data information about 1.2mbps faster than the transmission rate of the existing 16kbps FM DARC system. It is also possible to send correction information for DGPS at cost.

Referring to Figure 2, looking at an example of the CIF structure for the high-precision location information transmission system using the terrestrial DMB (T-DMB) according to the present invention, the CIF configuration information is MCI (Multiplex Configuration Information) carried by the FIC Included in A subchannel composed of one CU has a unique subchannel identifier (ID) in a CIF frame, and when a set of subchannels does not fill the entire CIF, padding using a separate pseudo random binary sequence (PRBS) in units of CUs (padding)

Referring to Figure 3, looking at the structure of the KDGPS_DMB data packet for the high-precision location information transmission system using the terrestrial DMB (T-DMB) according to the present invention, the user application information to the DMB to support various application services In this case, the extension 13 (FIG 0/13) of FIG. 0 (Fast Information Group) type 0 is applied. In addition, the user application data packet configuration can be composed of 11-bit user application type definition (b15-b5), 5-bit user application data length (b4-b0), and an integer multiple of 8 bits within 32 bytes. have.

In other words, b15-b5 can be applied to the code (00000000101) allocated for DGPS of ETSI 300 401 as it is, and b4-b0 indicates the length of a KDGPS_DMB data field in bytes. In addition, the data field of KDGPS_DMB is configured as follows, and is composed of a data head occupying 24 bits followed by a 40-bit data code.

In addition, the data head is located at the head of a data field of the KDGPS_DMB format and is required for KDGPS_DMB among two words (total 60 bits: 30 bits / word) information appearing at the beginning of all message formats defined in the RTCM SC-104. A total of 24 bits can be encoded to encode a 6-bit message type, a 13-bit message information reference time (Modified Z-count), and a 5-bit length of frame. In other words, as shown in the following [Table 1], only the information necessary for restoring the RTCM SC-104 code from the DMB receiver is selected from the type and size of information represented by the two words corresponding to the head of the RTCM SC-104. To the header of the DGPS packet.

As shown in [Table 1], the header information of KDGPS_DMB in the present invention is 8 bits of Preamble, 10 bits of Station ID, 3 bits of Sequence No., 3 in the header information of RTCM SC-104 which is a total of 60 bits. It omits a bit of station health and a parity of 12 bits to make a total of 24 bits.

Meanwhile, Message type (DGPS message type) and contents defined in RTCM SC-104 are shown in [Table 2] below.

As shown in [Table 2], message types and contents defined in RTCM SC-104 are defined from 1 to 63. Each message is fixed, tentative, reserved, It is set to a state such as undefined or retired. In the present invention, KDGPS_DMB may transmit message information # 1 (Fixed_differential GPS corrections) and # 2 (Fixed_delta differential GPS corrections).

And the above included in the data head Modified Z-count indicates the reference time of the message information, and when transmitting from the pseudo signal generator (pseudolite) means the start time of the next message. This information differs in the Z-count and scale of the GPS signal (RTCM; 0.6 seconds, GPS; 6 seconds) because it takes into account the variable length of RTCM information. In addition, the length of frame represents the frame size of the RTCM message, the unit is a 30-bit word used in the GPS signaling system.

The KDGPS data code, which occupies 40 bits in the KDGPS_DMB data packet block, is used to abbreviately transmit messages 1 and 2 (see [Table 2]), which are key error correction information, among the DGPS information provided by the RTCM SC-104. Set. In addition, the information of RTCM SC-104 Message type 1 (see [Table 3] and FIG. 3) transmits 40 bits of information per satellite, but in KDGPS_DMB, it is a data field that is an integer multiple of 8 bits within 32 bytes. Can be configured. At this time, data is loaded by the number of satellites provided with error correction information, and other data is replaced with a FILL code filled with bits of 1 and 0 repeated, and each 40-bit data code is configured as shown in FIG. 3.

In addition, the data codes include six items, such as Scale factor and Satellite ID, for transmitting KDGPS_DMB information provided by RTCM SC-104 Message type 1, and the precision is 16-bit pseudorange correction (PRC). In the case of 0.02 meters, the range rate correction (RRC) of 8 bits is set to 0.002 meters per unit time (sec). Each of these required data bits is shown in Table 2 below.

In addition, when converting the format of the KDGPS_DMB method in the present invention to the RTCM SC-104 compatible code in the DMB receiver, it follows the following format.

Preamble (8 bits), Station ID (10 bits), Sequence No. (3 bits), Station health (3 bits), information omitted from the two headers (60 bits total) that appear as headers in all messages of the RTCM SC-104 ) And Parity (12 bits) are replaced with 0, and the first 8 bits of Preamble are replaced with the values of 66hex defined in RTCM SC-104 (see Table 1).

In addition, the DGPS information type received at the DMB receiver and added with the elimination information is assumed to have an error by assuming that the "Haming Code: each parity bit defined by ICD-GPS-200 is an even number for the designated bit. Parity check for detecting and correcting) to restore information in the original RTCM SC-104 format.

Therefore, in the present invention, the DGPS correction information is formatted and transmitted to be suitable for the DMB method, and the terminal receives and converts it to an RTCM SC-104 compatible code so that the position error of the GPS of up to several tens of meters can be corrected within several meters. Do it.

The high-precision location information transmission system and the reception system using the terrestrial DMB (T-DMB) according to the above scheme are schematically illustrated in FIGS. 4 and 5.

Referring to Figure 4, when looking at the high-precision position information transmission system using the terrestrial DMB (T-DMB) according to a preferred embodiment of the present invention, the DGPS for DGPS for correcting the position error of the GPS in the DGPS monitor station 100 The RTCM SC-104 code, which is correction information, is transmitted, and the data receiver 110 receives it in real time. The data receiver 110 encodes the DGPS correction information of the RTCM SC-104 code received in real time from the DGPS monitor station 100 according to the above-described format method and formats the KDGPS_DMB data to be suitable for the DMB method. Then, the DGPS correction decoder 140 decodes a signal formatted with KDGPS_DMB data so as to comply with the DMB method, and simultaneously decodes and corrects position error information of the GPS received through the GPS receiving antenna from the GPS receiving positioning device 130. Then, it is configured to transmit it to the data transmitter 150 for transmitting to the DMB receiver 220 of the receiving system through the DGPS data transmitting station 160 of the DMB transmission system.

Also, referring to FIG. 5, a high-precision location information receiving system using terrestrial DMB (T-DMB) according to a preferred embodiment of the present invention, in a state in which DGPS correction information is transmitted through a DMB broadcasting network, In order to receive this signal, when the DMB receiver 220 receives the KDGPS_DMB signal, the DGPS data decoder 230 decodes (decodes) the KDGPS_DMB signal and converts the signal into a DGPS correction information signal of an RTCM SC-104 compatible code. Output to 250. Then, the GPS receiving positioning device 250 corrects the GPS position information of the error of up to several tens of meters received through the GPS receiving antenna 240 by using the DGPS correction information signal, and outputs the corrected position data so that the user has an error of several meters. It is possible to check the position of the moving object within the range.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1 is a diagram illustrating a transmission frame structure of a DMB for a high-precision location information transmission system using a terrestrial DMB (T-DMB) according to the present invention.

2 is a diagram showing an example of a CIF (Common Interleaved Frame) structure for a high-precision location information transmission system using a terrestrial DMB (T-DMB) according to the present invention.

3 is a diagram illustrating a structure of a KDGPS_DMB data packet for a high-precision location information transmission system using terrestrial DMB (T-DMB) according to the present invention.

Figure 4 is a schematic diagram showing a high-precision location information transmission system by using a terrestrial DMB (T-DMB) according to an embodiment of the present invention.

FIG. 5 schematically illustrates a system for receiving high-precision location information by using terrestrial DMB (T-DMB) according to an embodiment of the present invention.

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

100: DGPS monitor station 110: data receiver

120: GPS receiving antenna 130, 250: GPS receiving positioning device

140: DGPS correction decoder 150: data transmitter

160: DGPS data transmission station 210: reception antenna

220: DMB receiver 230: DGPS data decoder

240: GPS receiving antenna

Claims (2)

RTCM SC-104 code, which is the correction information for DGPS, is formatted and transmitted to suit the terrestrial DMB (T-DMB) method, and the terminal receives it and converts it into RTCM SC-104 compatible code to correct GPS errors of up to several tens of meters. In the high precision position information transmission system, The format (contents of the correction information data for DGPS) is an 11-bit user by applying FIG. 13 (FIG 0/13) of FIG. 0 (Fast Information Group) type 0 that defines user application information to support various application services. An application type definition (b15-b5), a 5-bit user application data length (b4-b0), and a data code (KDGPS_DMB data field) of 8-bit integer size within a 32-byte size, wherein b15-b5 is an ETSI. The code (00000000101) allocated for the DGPS of 300 401 is applied as it is, and b4-b0 indicates the length of the KDGPS_DMB data field in bytes, and the KDGPS_DMB data field has a 24-bit data head and 40-bit data codes. But with The 24-bit data head is located at the head of the KDGPS_DMB format data field and the 6-bit message required for KDGPS_DMB in two words (30 bits / word) appearing at the beginning of all message formats defined in RTCM SC-104. Composed of type code, 13-bit message information reference time code, and 5-bit frame size code, The 40-bit data codes are six pieces of data necessary for transmitting the KDGPS_DMB information provided by the RTCM SC-104, and the number 1 error correction information, which is the core of the 40-bit DGPS information for each satellite, provided by the RTCM SC-104. And encoded to abbreviate message 2 and In addition, the formatted correction information is a data receiver for transmitting the RTCM SC-104 code, which is the DGPS correction information for correcting the position error of the GPS at the DGPS monitor station, and receiving the data in real time, and the DGPSD correction received at the data receiver. DGPS correction decoder for decoding and correcting the error information of the GPS receiver positioning device receiving the information and the position signal received from the satellite and the data received from the DGPS correction decoder to receive the data to be sent to the DMB receiver through the DMB transmission system High precision location information transmission system using terrestrial DMB, characterized in that it comprises a transmitter. In the high precision position information receiving system for correcting the position error of the GPS received by the DMB receiver according to the received correction information for DGPS, A DGPS data decoder for converting KDGPS_DMB type DGPS correction information of the DMB additional broadcasting received through the DMB receiver into an RTCM SC-104 compatible code and transmitting the same to the DGPS receiving system; The DGPS data decoder replaces the information of the RTCM SC-104 omitted from the data head among the correction information data for the KDGPS_DMB type DGPS by 0, and replaces the first 8-bit preamble with a value of 66hex defined in the RTCM SC-104. By parity check (hamming code), error is detected and corrected by substituting the information for each satellite provided by RTCM SC-104 omitted from the data code to 0 and assuming each parity bit is even for the specified bit. Encoding and decoding, The apparatus may further include a GPS receiving positioning device that receives the GPS position signal received through the GPS receiving antenna and the DGPS correction information decoded through the DGPS data decoder, corrects an error of the GPS position signal and outputs the corrected position data. High precision location information receiving system using terrestrial DMB, characterized in that.

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