KR20070097710A - Receiving apparatus for dmb signals and gps signal - Google Patents

Abstract

A DMB(Digital Multimedia Broadcasting) and GPS(Global Positioning System) receiving apparatus is provided to improve the receiving sensibility of DMB and GPS signals by preventing the DMB and GPS signals from being lost by glass windows of a vehicle. The first receiving unit(200), installed in the outside of a vehicle, receives a DMB signal provided from a DMB satellite and a satellite repeater and a GPS signal provided from a GPS satellite and transmits the DMB signal and the GPS signal to the inside of the vehicle. The second receiving unit(300), installed in the vehicle, receives the DMB signal and the GPS signal of the first receiving unit and amplifies the DMB signal and the GPS signal at a certain level. A main receiving unit(400) connects with the second receiving unit through a cable, provides the DMB signal received through the second receiving unit and the DMB signal provided from the DMB satellite and the satellite repeater to a DMB signal processing unit, and provides the GPS signal of the second receiving unit and the GPS signal provided from the GPS satellite to a GPS signal processing unit.

Description

DMB and GPS receivers {RECEIVING APPARATUS FOR DMB SIGNALS AND GPS SIGNAL}

1 is a view showing the configuration of a general DM receiver.

2 is a diagram showing a state in which the DMMB and GPS receiver according to the present invention is installed.

3 is a diagram illustrating an example of a configuration of a DMB and a GPS receiver shown in FIG. 2.

4 is a diagram illustrating an example configuration of a first antenna and a second antenna shown in FIG. 3.

FIG. 5 is a diagram illustrating another example of the configuration of the first antenna and the second antenna shown in FIG. 3.

FIG. 6 is a diagram illustrating a configuration of another example of the first antenna and the second antenna shown in FIG. 3.

<Explanation of symbols for main parts of the drawings>

200: first receiver 211: first antenna

213: second antenna 215, 340: first duplexer and second duplexer

217 and 311: first electrode plate 300: second receiver

313: Multiplexer

320, 330: first signal processor and second signal processor

400: main receiver

The present invention relates to a DMB and GPS receiver, and more particularly, to an apparatus capable of minimizing a loss of DMMB and GPS signals due to a vehicle body.

General Digital Multimedia Broadcasting (DMB) is a next-generation broadcasting system that is expected to replace the existing analog broadcasting with broadcasting capable of receiving not only CD-quality high-quality audio but also text, graphics, and moving images. together It is the next generation broadcasting that provides various data services, excellent mobile reception quality. In addition, digital broadcasting is a broadcasting system for viewing and listening to transmit various multimedia information in text and graphics.

1 is a view showing the configuration of a general DMB and GPS receiver. As shown in FIG. 1, a DM-B satellite body 13 for converting and transmitting a Ku-Band DMB signal supplied from a DMB broadcasting center by converting a DM-B signal of an S-band, and a GPS satellite 14 for transmitting a GPS signal. And a terminal 15 for receiving and displaying the DM signal and the GPS signal of the S-band. In this case, the terminal 15 converts the received S-band DMB signal into a baseband signal, and the baseband signal is output as digital data after demodulation and error correction of the data.

The conventional DM and GPS receivers receive Ku-band DMB signals supplied from the DMB satellites 13, convert them into DM-signals of S-band, and supply them to the terminal 15. 17) further includes. The satellite repeater 17 is installed at a predetermined position to solve the shadow area of the DMB signal.

An antenna for receiving the DMB signal and the GPS signal supplied from the general DMB satellite body 13, the GPS satellite body 14, or the satellite repeater 17 is usually installed in a dashboard on the inner rear of the vehicle to provide the satellite repeater ( 17) a first antenna for receiving a DMB signal supplied from the DC antenna, a DMB signal provided on the front dashboard of the vehicle, and supplied from the DMB satellite body 13 and a GPS signal supplied from the GPS satellite body 14, respectively. And a main receiver comprising a second and a second antenna for receiving, wherein the second and third antennas are installed in one housing. In addition, the first antenna is usually a vertical antenna, the second antenna and the third antenna is usually installed as a horizontal antenna, the DMB signal of the first antenna is connected to the housing through the port of the connecting jack.

The DMB signal of the satellite repeater 17 received through the first antenna and the DMB signal of the DMB satellite 13 received through the second antenna are supplied to and processed by a DMB signal processor (not shown). The GPS signal received through the 3 antennas is supplied to the GPS signal processor (not shown), processed, and displayed on the screen. Here, the first antenna performs a diversity function for eliminating a shadow area and a function of improving reception sensitivity of a DMB signal received through the second antenna. For example, the reception sensitivity of the DMB signal is improved due to the overlapping of the DMB signal received through the first antenna and the DMB signal received through the second antenna.

Typically, the DMB satellite 13 is located at 144 degrees E. and transmits a DMB broadcast signal supplied from the DMB broadcast center to a moving vehicle. In addition, the GPS satellite body 14 transmits the GPS signal to the vehicle by turning the earth every 12 hours with a slope of 55 degrees with respect to the equator plane.

Since the first antenna for receiving the DMB signals of the DMB satellite body 13 and the satellite repeater 17 is usually installed in the rear dashboard of the vehicle, the DMB signal and the GPS signal are passed through the rear window of the vehicle. 1 is received via antenna. However, since the rear window of the vehicle includes a heating wire, etc., a loss of about 6-10 dB is lost between the DMB signal of the actual DMB satellite 13 and the satellite repeater 17 and the DMB signal received through the first antenna. This will occur. Therefore, there is a problem in that the reception sensitivity of the DMB signal is lowered and the image quality and sound quality of the DMB signal are lowered. Therefore, there is a need for a separate device capable of reducing signal loss due to the windshield of the vehicle body and simultaneously receiving a GPS signal as well as a DMB signal.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is a first receiver for receiving a DMB signal of a DMB satellite and a GPS repeater and a GPS signal of a GPS satellite at a predetermined position outside of a vehicle in order to solve a shadow area. And installing a second receiver on the internal rear dashboard of the vehicle to supply the DMB signal and the GPS signal of the first receiver to the main receiver, thereby preventing the DMB signal and the GS signal loss due to the vehicle's body window. An object of the present invention is to provide a DMMB and GPS receiver which can prevent and improve the reception sensitivity of the DMMB and GPS.

DMB and GPS receiver according to the present invention for achieving the above object,

Receives the DM signal from the DM satellite and the GPS repeater and the GPS signal supplied from the GPS satellite, respectively receive the received DM signal to the DM signal processor for processing and display, and provide the received GPS signal to the GPS signal processor In the DMMB and GPS receiver to display after processing,

A first receiver installed outside the vehicle and receiving the DM signal and the GPS signal supplied from the GPS satellite body from the DM satellite and the satellite repeater and transmitting the signal to the inside of the vehicle body;

A second receiver installed inside the vehicle to receive DM signals and GPS signals of the first receiver;

The DM signal and the DM signal received from the DM receiver and the satellite repeater connected to the second receiver through the cable are supplied to the DM signal processor, and the GPS signal and the GPS satellite of the second receiver are supplied. It characterized in that it comprises a main receiver for providing each GPS signal supplied to the GPS signal processing unit, respectively.

Preferably, the first receiver comprises: a first antenna for receiving a DMB signal supplied from the DMB satellite and the satellite repeater;

A second antenna for receiving a GPS signal supplied from the GPS satellite body;

A first duplexer outputting the DMB signal and the GPS signal received through the first antenna and the second antenna as one signal;

And a first electrode plate connected to an outer rear window of the vehicle to pass the output signal of the first duplexer,

The second receiver may further include a second electrode plate connected to an inner rear window of the vehicle;

A multiplexer for multiplexing the output signal of the second electrode plate into a plurality of signals;

A first low noise amplifier and a first low noise amplifier for extracting and then amplifying a noise component included in an output signal of the first filter and a first filter for extracting a DMB signal of a predetermined frequency band among the output signals of the multiplexer and a predetermined output signal of the first low noise amplifier A first signal processing unit including a first band pass filter for outputting a signal of a frequency band;

A second low noise amplifier and a second low noise amplifier for extracting a noise signal included in an output signal of a second filter and a second filter extracting a GPS signal of a predetermined frequency band from the output signal of the multiplexer and a predetermined output signal of the second low noise amplifier A second signal processor including a second band pass filter for outputting a signal in a frequency band;

And a second duplexer which outputs the output signal of the first signal processor and the output signal of the second signal processor as one signal and supplies the signal to the main receiver through a cable.

In addition, the first electrode plate of the first receiver and the second electrode plate of the second receiver may vary according to the dielectric constant of the window of the vehicle, the area of the first and second electrode plates, and the distance between the first and the second electrode plates. It is characterized in that it is provided to have a determined capacitance.

The first antenna of the first receiver includes a first coil for receiving a DMB signal transmitted in a first preset frequency band and a second coil for receiving a GPS signal transmitted in a second preset frequency band. Characterized in that the helical type, and the first antenna of the first receiver, the first patch antenna for receiving the DMB signal transmitted in the first frequency band set in advance and the second frequency band set in advance And one patch type having a second patch antenna for receiving a GPS signal, wherein the first antenna of the first receiver is a first antenna for receiving a DMB signal transmitted in a preset first frequency band. A second rod antenna for receiving a GS signal transmitted in a rod antenna and a second preset frequency band; Characterized in that it is provided.

According to the present invention, it is possible to minimize the DM signal loss of the DMB satellite and the GPS repeater generated by the vehicle body and the GPS signal loss of the GPS satellite to minimize the degradation of the DMB signal and the GPS signal caused by the vehicle body.

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

2 is a view showing the configuration of the DMB and GPS receiver according to the present invention. 3 is a diagram illustrating in detail the configuration of the first receiver and the second receiver illustrated in FIG. 2.

Referring to FIG. 2, the DMB and GPS receiver according to the present invention receives a DMB signal supplied from the DMB satellite 111 and the satellite repeater 113 and a GPS signal supplied from the GPS satellite 115. A first receiver 200 for transmitting therein, a second receiver 300 installed inside the vehicle and amplifying the DMB signal and the GPS signal of the first receiver 200 to an incremental level, and the second receiver And a DMB signal of the second receiver 300 and a DMMB signal supplied from the DMB satellite 111 and the satellite repeater 113 to the DMMB signal processor (not shown) for processing. After the display, the PS signal of the second receiver 300 and the GPS signal supplied from the GPS satellites 115 are respectively provided to the GPS signal processor (not shown) for processing. It includes a main receiving unit 400 to display after.

That is, the DM signal supplied from the DM satellite body 111 and the satellite repeater 113 and the GS signal supplied from the GPS satellite body 115 are received through the first receiver 200 outside the vehicle, and the received DM signal is received. And the GPS signal is supplied to the main receiver 400 through the second receiver 300. The main receiver 400 supplies a DMB signal of the second receiver 300 and a DMB signal supplied from the DMB satellite 111 and the satellite repeater 113 to the DMB signal processor (not shown) for processing. The PS signal of the second receiver 300 and the GPS signal supplied from the GPS satellites 115 are provided to the PS signal processor (not shown) for processing and then displayed.

Here, as illustrated in FIG. 3, the first receiver 200 includes a first antenna 211 and a GPS satellite body for receiving a DMB signal supplied from the DMB satellite 111 and the satellite repeater 113. A second antenna 213 for receiving a GPS signal supplied from the 115, and a DMB signal and a GPS signal received through the first antenna 211 and the second antenna 213 as one signal; And a first electrode plate 217 connected to the outer rear window of the vehicle for passing the output signal of the first duplexer 215.

In addition, the second receiver 300 is connected to the inner rear window of the vehicle to receive the output signal of the first duplexer 215 of the first receiver 200 and the first receiver 200 passed through the window. A multiplex signal 313 for outputting the output signal of the second electrode plate 311, the second electrode plate 311 as a plurality of signals, and a DMB signal having a predetermined frequency band from the output signal of the multiplexer 313. The output signal of the first low noise amplifier 323 and the first low noise amplifier 323 to remove and amplify the noise components included in the output signal of the first filter 321 and the first filter 321 to extract A first signal processor 320 including a first band pass filter 325 for transmitting a predetermined frequency channel, and a second filter 331 for extracting a GPS signal of a predetermined frequency band from the output signal of the multiplexer 313. ) And noise included in the output signal of the second filter 331. A second signal processor including a second low noise amplifier 333 that removes the minute and a second band pass filter 335 for transmitting the output signal of the second low noise amplifier 333 through a predetermined frequency channel ( 330). In addition, the second receiver 300 outputs the output signal of the first signal processor 320 and the output signal of the second signal processor 330 as one signal and supplies them to the main receiver 400 through a cable. A second duplexer 340 is further included.

Here, the first electrode plate 217 of the first receiver 200 and the second electrode plate 311 of the second receiver 300 may have a dielectric constant of the glass window of the vehicle, the first and second electrode plates 217 ( It has a capacitance determined according to the area of 311 and the distance between the first and low second electrode plates 217 and 311.

Accordingly, the DMB signal of the first antenna 211 and the GPS signal of the second antenna 213 are transferred to the inside of the vehicle through the capacitance formed by the first electrode plate 217, the glass window, and the second electrode plate 311. Is sent.

FIG. 4 is a diagram illustrating a configuration of the first antenna 211 and the second antenna 311 of the first receiver 200 illustrated in FIG. 2. As shown in FIG. 4, the first antenna 211 and the second antenna 213 are provided in a helical type. That is, the first antenna 211 is provided with a first coil wound around a predetermined number of turns f1 to receive a DMB signal transmitted in a preset first frequency band, and the second antenna 213 is previously It is provided in a helical type including a second coil wound with a set number of turns (f2) to receive a GPS signal transmitted in the set second frequency band.

In the embodiment of the present invention, the first antenna 211 and the second antenna 213 have been described as an example of the helical type provided by coils having different winding numbers, but as shown in FIG. It may be composed of one patch type having a first patch antenna for receiving the DMB signal transmitted in the first frequency band and a second patch antenna for receiving the GPS signal transmitted in the second preset frequency band. 6, a first rod antenna for receiving a DMB signal transmitted in a first preset frequency band and a second rod antenna for receiving a GPS signal transmitted in a second preset frequency band, as illustrated in FIG. 6. May be

In the embodiment of the present invention provided as described above, first, the DMB signal supplied from the DMB satellite 111 and the satellite repeater 113 and the GPS signal supplied from the GPS satellite body 115 are provided in the first receiver 200. Are received according to the number of turns f1 and f2 of the first antenna 211 and the second antenna 213, respectively, and the output signals of the first antenna 211 and the second antenna 213 are first duplexers. 215 is supplied to one signal, and the output signal of the first duplexer 215 is supplied to the first electrode plate 217.

That is, the capacitance determined by the area of the first electrode plate 217 and the second electrode plate 311, the dielectric constant of the rear glass of the vehicle, and the distance between the first electrode plate 217 and the second electrode plate 311. The output signal of the first duplexer 215 is supplied to the multiplexer 313 of the second receiver 300 by the turn.

The multiplexer 313 multiplexes the output signal of the second electrode plate 311 into a plurality of signals, and the output signal of the multiplexer 313 is supplied to the first filter 321 and the second filter 331, respectively. do.

The first filter 321 outputs a DMB signal having a predetermined frequency, and after the noise component included in the DMB signal received through the first low noise amplifier 323 is removed, the DMB signal of the first filter 321 is removed. Amplified to a predetermined level. The output signal of the first low noise amplifier 323 is a DMB signal of a predetermined frequency band is output through the first band pass filter 325.

Meanwhile, an output signal of the multiplexer 313 supplied to the second filter 331 outputs a GPS signal having a predetermined frequency band, and the GPS signal is a predetermined level after noise is removed through the second low noise amplifier 333. Is amplified. As the output signal of the second low noise amplifier 333, a GPS signal having a predetermined frequency band is output through the second band pass filter 335.

Output signals of the first band pass filter 325 and the second band pass filter 335 are supplied to a second duplexer 340, and the second duplexer 340 is provided with the first band pass filter 325 and The output signal of the second band pass filter 335 is output as one signal.

The output signal of the second duplexer 340 is supplied to the main receiver 400 through a cable.

Since the process after receiving and processing the DMB signal and the GPS signal received through the main receiver 400 is the same as a normal operation, detailed description thereof will be omitted.

FIG. 5 is a diagram illustrating another example of the configuration of the first antenna 211 and the second antenna 213 shown in FIG. 3 in detail. That is, as shown in FIG. 5, the first antenna 211 and the second antenna 213 are each provided as a square or circular patch antennas having different reception frequency bands, and receive signals of the first frequency band. The first patch P1 is supplied to the first duplexer 215 and the first electrode plate 217 after receiving the DMB signal, and the second patch P2 receiving the signal of the second frequency band is GPS. After receiving the signal, the signal is supplied to the first duplexer 215 and the first electrode plate 217. Since the process is the same as described above, a detailed description thereof will be omitted.

FIG. 6 is a diagram illustrating another example of the configuration of the first antenna 211 and the second antenna 213 shown in FIG. 3 in detail. That is, as shown in FIG. 6, each of the first antenna 211 and the second antenna 213 is provided with load antennas having different reception frequency bands, and receives a first load of signals of the first frequency band. The antenna L1 is supplied to the first duplexer 215 and the first electrode plate 217 after receiving the DMB signal, and the second rod antenna L2 receiving the signal of the second frequency band is a GPS signal. After receiving the power supply to the first duplexer 215 and the first electrode plate 217, since the process is the same as described above, a detailed description thereof will be omitted.

As described above, the DM signal supplied from the DM satellite body 111 and the satellite repeater 113 and the GS signal supplied from the GPS satellite body 115 are received through the first receiver 200 installed outside the vehicle. After being transmitted to the second receiver 300 therein through the windshield of the vehicle, it is possible to prevent damage to the vehicle for connecting the first receiver and the second receiver of the vehicle, and the connection between the first receiver and the second receiver Signal degradation due to cables is prevented.

As described in detail above, according to the DMB and GPS receiver of the present invention, the first antenna and the second antenna are installed on the outside of the vehicle to receive the DM signal and the GPS signal supplied from the DM satellite and the GPS satellite body. After receiving through the transmission through the capacitance determined according to the area of the first electrode plate and the second electrode plate, the dielectric constant of the glass of the vehicle, and the distance between the first electrode plate and the second electrode plate to the second receiving unit inside the vehicle As a result, the reduced reception sensitivity due to the vehicle body may be improved, and damage to the vehicle for connecting the first receiver and the second receiver may be prevented, and due to the connection cable between the first receiver and the second receiver, Signal deterioration is prevented.

Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to the above-described embodiments, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications or changes are possible.

Claims (7)

In the DMB and GPS receiver apparatus for receiving and processing a DMB signal supplied from a DMB satellite and a GPS repeater and a GPS signal supplied from a GPS satellite, A first receiver installed outside the vehicle and receiving the DM signal and the GPS signal supplied from the GPS satellite body from the DM satellite and the repeater, and transmitting the received GM signal to the inside of the vehicle body; A second receiver installed inside the vehicle and receiving the DMB signal and the GPS signal of the first receiver and amplifying the signal to a predetermined level; The DM signal and the DM signal received from the DM receiver and the satellite repeater connected to the second receiver through the cable are supplied to the DM signal processor, and the GPS signal and the GPS satellite of the second receiver are supplied. DMB and GPS receiver, characterized in that it comprises a main receiver for providing each GPS signal supplied to the GPS signal processor. The method of claim 1, wherein the first receiver, A first antenna for receiving a DMB signal supplied from the DMB satellite and the satellite repeater; A second antenna for receiving a GPS signal supplied from the GPS satellite body; A first duplexer outputting the DMB signal and the GPS signal received through the first antenna and the second antenna as one signal; DMB and GPS receiver, characterized in that the first electrode plate is connected to the rear window of the outside of the vehicle to pass the output signal of the first duplexer. The method according to claim 1 or 2, wherein the second receiver, A second electrode plate connected to the inner rear window of the vehicle; A multiplexer for multiplexing the output signal of the second electrode plate into a plurality of signals; The first low noise amplifier and the output signal of the first low noise amplifier to remove and amplify the first filter and the noise component included in the output signal of the first filter to extract the DMB signal of the predetermined frequency band of the output signal of the multiplexer A first signal processor including a first band pass filter for outputting a signal of a predetermined frequency band; The second low noise amplifier and the second low noise amplifier output signal of the second low noise amplifier and the second filter for extracting the GPS signal of a predetermined frequency band of the output signal of the multiplexer and the noise component included in the output signal of the second filter and then amplified A second signal processing unit including a second band pass filter for outputting a signal of a predetermined frequency band; And a second duplexer which outputs the output signal of the first signal processor and the output signal of the second signal processor as one signal and supplies the output signal to the main receiver through a cable. 4. The method of claim 3, wherein the first electrode plate of the first receiver and the second electrode plate of the second receiver comprise a dielectric constant of a glass window of an automobile, an area of the first and second electrode plates, and between the first and second electrode plates. DMB and GPS receiver apparatus characterized in that it has a capacitance determined according to the distance of. The first antenna of claim 4, wherein the first antenna of the first receiver is configured to receive a first coil for receiving a DMB signal transmitted in a first preset frequency band and a GPS signal transmitted in a second preset frequency band. DM and GPS receiver, characterized in that the helical type provided by the second coil. The method of claim 4, wherein the first antenna of the first receiver is configured to receive a first patch antenna for receiving a DMB signal transmitted in a first preset frequency band and a GPS signal transmitted in a second preset frequency band. DM and GPS receiver, characterized in that one patch type having a second patch antenna for. 5. The method of claim 4, wherein the first antenna of the first receiver is configured to receive a first load antenna for receiving a DMB signal transmitted in a first preset frequency band and a GPS signal transmitted in a second preset frequency band. DMB and GPS receiver, characterized in that provided as a second rod antenna for.

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