KR100787053B1 - An antena apparatus for terrestrial digital multimedia broadcasting receiver using window heat coil of the vehicle - Google Patents

Abstract

An antenna apparatus for receiving terrestrial DMB by using a car window's heat coil is provided to receive a terrestrial DMB signal through the heat coil of the car so that a car owner can reduce unnecessary cost because the car owner has no need to purchase a separate terrestrial DMB receiving antenna. An antenna apparatus for receiving terrestrial DMB(Digital Multimedia Broadcasting) by using a car window's heat coil includes the car window's heat coil(1), an RF(Radio Frequency) module(10) and a main module(20). The RF module is installed in the power line of a side of the car window's heat coil, removes noise after receiving a terrestrial DMB signal, selects and outputs the signal of which the noise is removed by channel. The main module has an AGC unit(24) which performs the AGC(Auto Gain Control) of the terrestrial DMB signal outputted from the RF module and outputs the terrestrial DMB signal to a terrestrial DMB receiver(30).

Description

ANTENNA APPARATUS FOR TERRESTRIAL DIGITAL MULTIMEDIA BROADCASTING RECEIVER USING WINDOW HEAT COIL OF THE VEHICLE}

1 is a perspective view of a vehicle equipped with a conventional digital multimedia broadcasting antenna,

2 is a block diagram of an antenna device for receiving terrestrial digital multimedia broadcasting using a vehicle window hot wire according to an embodiment of the present invention;

* Description of Major Symbols in Drawings *

1: vehicle heating wire

10: RF module

11: Power supply noise filter 12: TV CH 8 tuner

13: CH 8 RF section 14: TV CH 12 tuner

15: CH 8 RF section 16: Amplifier section

20: main module

21: 2nd TV CH 8 Tuner 22: 2nd TV CH 8 Tuner

23: second amplifier

24: Auto Gain Controller (AGC)

30: digital multimedia broadcasting receiver

The present invention relates to a receiver for receiving digital multimedia broadcasting, and more particularly, for receiving terrestrial digital multimedia broadcasting using a vehicle window heating wire for receiving terrestrial digital multimedia broadcasting by using a heating wire installed in a rear window of a vehicle as an antenna. An antenna device.

Digital multimedia broadcasting is a broadcasting service that provides various multimedia signals such as audio and video to a fixed, portable, and vehicle receiver in a digital manner, and has a system A, Dh, and E for providing a system. System A complies with the European Digital Multimedia Broadcasting Standard (OFDM: Orthogonal Frequency Division Multiplexing) of digital satellite broadcasting and terrestrial digital multimedia broadcasting, and system Dh is based on terrestrial digital multimedia broadcasting, but adopts a mixed method of accommodating satellite digital multimedia broadcasting. The system E adopts a code division multiple access (CDM) scheme which is almost the same as the code division multiple access (CDMA).

In general, a TV broadcast wave may be classified into an L-VHF signal, an H-VHF signal, and a U-VHF signal. L-VHF signal is from 2 to 6 channels of TV, H-VHF signal is from 7 to 13 channels of TV, and U-VHF signal refers to more than 14 channels of TV. The terrestrial digital multimedia broadcasting conforming to the standard transmits broadcasting using TV channels 8 (180-186 MHz) and 12 (204-210 MHz), which are H-VHF signal bands. The channel is further divided into three frequency blocks (multiplexers), which can allocate a bandwidth of 1.54 Mbps per block. With this bandwidth, one video channel and three audio and data channels can be accommodated. Thus, a bandwidth of one channel (VHF No. 12) of an analog TV can accommodate three video channels and nine audio and data channels. In this way, terrestrial digital multimedia broadcasting can be applied with digital technology to significantly increase the frequency efficiency.

 On the other hand, satellite digital multimedia broadcasting is serviced in the 2.630 ~ 2.655 kHz band corresponding to the ultra high frequency (UHF), which is much higher than the terrestrial wave. If the terrestrial DMB covers the metropolitan area by launching radio waves from the Gwanaksan transmission station, satellite digital multimedia broadcasting is capable of broadcasting nationwide at once by launching radio waves toward the Korean peninsula from satellites outside the atmosphere. First of all, the satellite-based service uses Ku-band frequency (K-band) to provide various contents such as news, music video, sports, movies, dramas, songs, jazz, foreign languages, securities, transportation, and weather. 13.824 ~ 13.883㎓) to the satellite. The satellite then transmits it to the terrestrial terminal through the S-band (2.630-2.655 GHz) allocated for digital multimedia broadcasting. If it is not possible to receive satellite signals directly, a terrestrial repeater called 'Gap Filler' relays broadcast signals, allowing users to freely use digital multimedia broadcasting services anytime and anywhere.

Since the digital multimedia broadcasting uses a technology completely different from the current AM broadcasting and FM broadcasting as described above, in order to receive the digital multimedia broadcasting, it is common to attach an antenna for receiving the digital multimedia broadcasting signal. Is no exception.

1 is a perspective view of a vehicle in which a conventional antenna for digital multimedia broadcasting is installed, a vehicle TV 202 is installed inside a vehicle 200, and a cable 204 is connected to the display 202. At the end of the cable 204, an external antenna 208 is provided.

In the case of the above-described vehicle digital multimedia broadcasting antenna device for a vehicle according to the related art, broadcast radio waves are received even inside a vehicle, but are extremely poor, so that normal viewing is not possible. Leave it inside the vehicle to protect the outside antenna or to prevent theft of the exposed antenna. To this end, the external antenna 208 installed at the end of the cable 204 is provided with an antenna fixing portion 206 made of a magnetic to facilitate attachment and detachment.

That is, in the conventional art as described above, in order to receive digital multimedia broadcasting in a vehicle, a digital multimedia broadcasting reception antenna device must be provided separately from the vehicle.

In addition, in the case of an antenna device for receiving a digital multimedia broadcasting for a vehicle, the antenna 208 must be attached to the outside of the vehicle during use, so that water may enter through the antenna wiring during rain or car washes, and corrosion of the vehicle body may occur. If the digital multimedia broadcasting is not received, the user has to remove and store it in the vehicle, which makes it very inconvenient for the user to use it.

In addition, the rod-type antenna of the conventional vehicle has a problem that the circuit is complicated because an additional genuine radio RF module must be used to receive both analog and digital signals together.

Accordingly, the present invention is to solve the problems of the above-described prior art vehicle digital multimedia broadcasting reception antenna device, and to receive a digital multimedia broadcasting signal by using a heating wire installed in the rear window of the vehicle as an antenna line. An object of the present invention is to provide an antenna device for receiving a digital multimedia broadcasting using a vehicle window hot wire.

An antenna device for receiving terrestrial digital multimedia broadcasting using a vehicle window heating wire of the present invention for achieving the above object includes a vehicle window heating wire; An RF module installed at one power line of the vehicle window heating wire to remove noise after receiving a terrestrial digital multimedia broadcasting signal, and to select and output the noise-removed signal for each channel; And a main module for automatically controlling the output signal of the RF module to output the terrestrial digital multimedia broadcasting receiver.

The RF module includes: a power noise filter for removing noise from the terrestrial digital multimedia broadcasting signal received by the window heating wire; A channel tuner unit which selects and extracts a broadcasting signal from the terrestrial digital multimedia broadcasting signal output from the power noise filter and outputs the terrestrial digital multimedia broadcasting signal to the terrestrial digital multimedia broadcasting reproduction value; An RF unit for performing RF signal processing on the terrestrial digital multimedia broadcasting signal extracted from the channel tuner unit; And an amplifying unit for amplifying the output signal of the RF unit and outputting the amplified signal to the main module.

The channel tuner unit may include: a TV channel 8 tuner for selecting and outputting a broadcast signal of TV channel 8 allocated for the terrestrial digital multimedia broadcasting; And a TV channel 12 tuner for selecting and outputting a broadcast signal of TV channel 12 allocated for the terrestrial digital multimedia broadcasting, wherein the RF unit amplifies the output signals of the TV channel 8 and 12 tuners to a two channel amplification unit. It is characterized in that the configuration.

The main module unit includes an automatic gain control unit for controlling and outputting an automatic gain for the output signal of the amplifying unit, and optionally, the terrestrial digital multimedia signal of the terrestrial digital multimedia signal introduced through a cable for transmitting the output signal of the amplifying unit. A second TV channel 8 tuner for selecting and outputting a broadcast signal of TV channel 8 allocated for terrestrial digital multimedia broadcasting; A second TV channel 12 tuner for selecting and outputting a broadcast signal of TV channel 12 allocated for the terrestrial digital multimedia broadcasting; A second amplifying unit for amplifying the output signal of the second TV channel 8 and 12 tuners and outputs the output signal to the automatic gain control unit may be further configured in front of the automatic gain control unit.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

2 is a block diagram of an antenna device for terrestrial digital multimedia broadcasting reception using a vehicle window hot wire according to an exemplary embodiment of the present invention.

As shown in FIG. 2, the antenna device for receiving terrestrial digital multimedia broadcasting using a vehicle window heating wire according to an embodiment of the present invention may include a wire for supplying power to one side of the vehicle window heating wire 1. 2 is connected to a power line and a third power line) to supply the vehicle power to the vehicle window heating wire 1, and detect the terrestrial digital multimedia broadcasting signal received by the vehicle window heating wire 1, and then use the RF for terrestrial digital multimedia broadcasting. After receiving the RF module 10 for performing signal processing and terrestrial digital multimedia broadcasting signals output from the RF module 10 in a wired or wireless manner, performing an auto gain control and performing a digital multimedia broadcasting receiver ( It is configured to include a main module 20 to output to 30.

The RF module 10 extracts the terrestrial digital multimedia broadcasting signal from the radio wave received from the vehicle window heating wire 1, and then performs terrestrial digital after filtering to remove unnecessary radio wave components, thermal noise of the vehicle window heating wire 1, and the like. After separating and extracting the signals for each channel included in the multimedia broadcasting signal, RF signals are processed and output.

To this end, the RF module 10 extracts the terrestrial digital multimedia broadcasting signal from the vehicle window heating wire 1 and receives the output signals of the power noise filter 11 and the power noise filter 12 which remove noise. TV CH 8 tuner 12 and CH 8 RF unit 13 for performing RF signal processing after extracting TV CH (channel) 8 signal and TV performing RF signal processing after extracting TV CH (channel) 12 signal A CH 12 tuner 14 and a CH 12 RF unit 15, and an amplifier 16 for receiving and amplifying signals from the CH 8 RF unit 13 and the CH 12 RF unit 15, respectively, Although not shown in the figure, it is configured to include an electrostatic source for supplying a stable power to each configuration of the RF module 10.

In the above-described configuration, the power noise filter 11 is coupled between the second power line 3 and the third power line 4 so that the power of the third power line 4 is supplied to the vehicle window heating line 1. After extracting the terrestrial digital multimedia broadcasting signal received from the vehicle window heating wire 1 independently of the power source, the noise is removed and output to the TV CH 8 tuner 12 and the TV CH 12 tuner 14. To this end, the power noise filter 11 directly connects the second power supply line 3 and the fourth power supply 4, and uses a surface acoustic wave resonance to extract an RF signal from the third power supply line 3. A resonance filter such as a resonance filter is provided.

The TV CH 8 tuner 12 and the TV CH 12 tuner 14 receive terrestrial digital multimedia broadcast signals output from the power noise filter 11, and then detect the broadcast signals of TV CH 8 and TV CH 12, respectively. Output to CH 8 RF unit 13 and CH 12 RF unit 15 for RF signal processing.

The CH 8 RF unit 13 and the CH 12 RF unit 15 receive a detection signal for each channel and then perform RF signal processing to convert a high frequency signal into a baseband signal and convert the converted baseband digital signal. After performing the stabilization and data processing to extract the extracted broadcast signal to be reproduced by the terrestrial digital multimedia broadcasting receiver, and outputs it to the amplifier 16.

The amplifier 16 amplifies the terrestrial digital multimedia broadcasting signal received through RF signal processing to an appropriate level and outputs the amplified signal to the mail module 20 through the wired cable 5.

The main module 20, which receives the terrestrial digital multimedia broadcasting signal processed by the RF signal from the RF module 10 through the wired cable 5, performs automatic gain control (AGC) on the received signal and then performs the digital multimedia. By outputting to the broadcast receiver 30, the digital multimedia broadcasting receiver 30 reproduces and outputs the received terrestrial digital multimedia broadcasting signal. To this end, the main module 20 includes an auto gain controller (AGC) 24 which performs automatic gain control on a signal transmitted from the RF module 10. In addition, the main module 20 may be configured to perform filtering on the external inflow wave to block the generation of noise due to the inflow of the external wave while the terrestrial digital multimedia broadcasting signal data is transmitted through the wired cable (5). To this end, a second TV CH 8 tuner 21 and a second TV CH performing the same functions as the TV CH 8 tuner 12 and the TV CH 12 tuner 14 at the front end of the automatic gain control unit 24. It may further comprise a second amplifier 23 for amplifying and outputting the output signal of the 12 tuner 22 and the second TV CH 8 tuner 21 and the second TV CH 12 tuner 22, which is As shown in FIG. 2, although not shown in the drawing, an electrostatic source unit for supplying stable power to each component of the main module 20 is provided.

In the above-described configuration of the present invention, the amplifying unit 16 and the second amplifying unit 23 are preferably configured as a two-channel amplifier so as to independently amplify each of the TV CH 8 signal and the TV CH 12 signal.

The terrestrial digital multimedia broadcasting receiving antenna device using the vehicle window hot wire of the present invention having the above-described configuration enables the terrestrial digital multimedia broadcasting signal to be received through the hot wire of the vehicle without providing a separate antenna.

According to the present invention having the above-described configuration, it is not necessary to purchase a separate terrestrial digital multimedia broadcasting receiving antenna for terrestrial digital multimedia broadcasting in a vehicle by allowing the terrestrial digital multimedia broadcasting signal to be received through a hot wire of the vehicle. It is possible to reduce the unnecessary cost of the owners of terrestrial digital multimedia broadcasting.

In addition, the present invention described above is replaced with the antenna for receiving the terrestrial digital multimedia broadcasting by heating the vehicle's heating wire, when using the terrestrial digital multimedia broadcasting receiving antenna attached to the outside of the vehicle as in the prior art, the removal in the case of car wash, etc. It provides an effect that eliminates the inconvenience of management, such as storage in the interior of the vehicle.

Claims (5)

A vehicle window hot wire; An RF module installed at one power line of the vehicle window heating wire to remove noise after receiving a terrestrial digital multimedia broadcasting signal, and to select and output the noise-removed signal for each channel; Terrestrial digital multimedia broadcasting using a vehicle window hot wire, comprising: a main module having an automatic gain control unit for automatically controlling the output terrestrial digital multimedia broadcasting signal of the RF module and outputting it to a terrestrial digital multimedia broadcasting receiver. Reception antenna device. The method according to claim 1, wherein the RF module A power noise filter for removing noise from the terrestrial digital multimedia broadcasting signal received by the window heating wire; A channel tuner unit which selects and extracts a broadcasting signal from the terrestrial digital multimedia broadcasting signal output from the power noise filter and outputs the terrestrial digital multimedia broadcasting signal to the terrestrial digital multimedia broadcasting reproduction value; An RF unit for performing RF signal processing on the terrestrial digital multimedia broadcasting signal extracted from the channel tuner unit; And an amplifying unit for amplifying an output signal of the RF unit and outputting the amplified signal to the main module. The method according to claim 2, The channel tuner unit includes: a TV channel 8 tuner for selecting and outputting a broadcast signal of TV channel 8 allocated for the terrestrial digital multimedia broadcasting; And a TV channel 12 tuner for selecting and outputting a broadcast signal of TV channel 12 allocated for the terrestrial digital multimedia broadcasting. And the RF unit amplifies the output signals of the TV channel 8 and 12 tuners and comprises two channel amplification units. delete The method of claim 3, wherein the main module unit, A second TV channel 8 tuner for selecting and outputting a broadcast signal of TV channel 8 allocated for the terrestrial digital multimedia broadcasting among digital multimedia signals introduced through a cable for transmitting an output signal of the amplifier; A second TV channel 12 tuner for selecting and outputting a broadcast signal of TV channel 12 allocated for the terrestrial digital multimedia broadcasting; And a second amplifier for amplifying the output signals of the second TV channel 8 and 12 tuners and outputting the amplified output signals to the automatic gain control unit, further comprising a front end of the automatic gain control unit. Antenna device for receiving digital multimedia broadcasting.

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