KR101212805B1 - Low output power and compact repeater for tv signal - Google Patents

Abstract

The present invention relates to a small output compact relay device for a TV signal. According to an embodiment of the present invention, in the relay apparatus for relaying a TV signal, a plurality of tuners for separating the input multi-channel broadcast signal for each channel, demodulating the broadcast signal separated from the tuner into an 8-VSB signal And a plurality of demodulators for correcting an error of a video signal included in the broadcast signal, a plurality of modulators for modulating each signal output to the plurality of demodulators into an 8-VSB signal, and a signal input from the plurality of modulators. A channel combiner to synthesize, an up-converter to frequency up the signal synthesized in the channel synthesizer, an amplifier to amplify the signal output from the frequency up to have a power of 10mW or less per MHz, output from a plurality of modulators The present invention relates to a small output compact relay device for a TV signal comprising a main controller for controlling the frequency of a signal. According to the present invention, there is provided a small output compact relay device for a TV signal that can re-send a signal after performing signal processing in a baseband of a multi-channel input signal input to the relay device.

Description

LOW OUTPUT POWER AND COMPACT REPEATER FOR TV SIGNAL

The present invention relates to a small output compact relay device for a TV signal.

The conventional TV relay system receives only one specific broadcast frequency channel at the reception antenna of the relay device, modulates and demodulates the TV broadcast signal radiated from the main transmission station, and retransmits it, and receives the award at the TV receiver.

The repeater of the conventional TV relay system has a problem in that the high frequency power supplied to the transmission antenna is several watts to several hundred watts, so that the size of the device is large and the output power is large, so that the cost of the repeater is high.

Conventional repeaters have a large transmission power and a wide viewing area, but there are problems of low economic efficiency and inefficiency in a small astigmatism area with many mountainous areas and high-rise buildings, such as a domestic environment.

In addition, the conventional relay apparatus has a problem that frequency channels are allocated to one channel, and thus multiple channels cannot be simultaneously transmitted and received.

In addition, the conventional multi-channel repeater has a problem in miniaturizing the repeater in such a way that the receiver and the up-converter using the tuner is used for each channel.

An object of the present invention is to provide a small output compact relay device for a TV signal capable of low power transmission and reception.

The problem to be solved by the present invention is to provide a TV signal relay device capable of transmitting and receiving multiple channels.

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a small output compact relay apparatus for a TV signal which can convert a plurality of received channels into the same channel or different channels and transmit the same.

In addition, an object of the present invention is to provide a small output compact relay device for a TV signal that can use one up-converter by allocating intermediate frequencies of a plurality of received channels to different consecutive frequencies separated by 6 MHz intervals.

According to an aspect of the present invention, in a relay apparatus for relaying a TV signal, at least one tuner for separating the input multi-channel broadcast signal for each channel, the video signal included in the channel signal separated for each channel Receiving unit for correcting the error of the output; A channel converter converting each channel signal output from the receiver into a channel signal of a set frequency using the sinusoidal signal input from a phase controlled oscillator for generating a sinusoidal signal having a reference frequency; A transmitter for synthesizing the plurality of converted channel signals output from the channel converter and outputting a channel signal having a power of 10 mW or less per MHz; And controlling the magnitude of the output signal by monitoring the magnitude of the signal output from the channel converter, wherein the frequency of the phase controlled oscillator is equal to the frequency of the input channel signal or is different from the input channel frequency. It is possible to provide a small output compact relay device for a TV signal including a main controller for controlling the phase controlled oscillator to be applied.

The tuner may further include an oscillator for converting the multichannel broadcast signal into a baseband signal and a mixer for mixing the multichannel broadcast signal and a signal supplied to the oscillator.

The main controller may control the frequency of the oscillator included in the tuner.

The tuner may separate the multi-channel broadcast signal into channel signals at 6 MHz intervals.

The relay device may further include a first filter unit configured to filter the separated channel signal at a rear end of the tuner.

The first filter part may be a SAW filter.

The apparatus may further include a first amplifier configured to amplify a signal output from the tuner between the tuner and the first filter unit.

The small output compact repeater for the TV signal may further include an automatic gain control unit configured to detect and attenuate the signal magnitude of each channel output from the receiver.

The small output compact type repeater for the TV signal includes: an up-converter for converting each channel signal to an uplink frequency before the first filter unit; And a down converter for converting the signal filtered by the first filter unit to a downlink frequency.

The receiving unit demodulates and decodes the channel signal input for each channel into an MPEG-2 8-VSB signal, and modulates an error corrected signal; A central processing unit for correcting the error of the signal input from the digital video signal module and transmitting the error corrected signal to the digital video signal module; A digital / analog converter for converting a signal input from the digital video signal module into an analog signal; And an oscillator configured to transmit a sine wave signal having a frequency set in the digital / analog converter.

The small output compact type repeater for the TV signal may further include a second filter unit for filtering each converted channel signal output from the channel converter.

The small output compact type repeater for the TV signal may further include a signal attenuator configured to attenuate when the size of each converted channel signal output from the second filter unit is greater than or equal to a set value.

The small output compact repeater for the TV signal may further include a channel combiner for combining the respective converted signals.

The transmitter may further include a high power amplifier configured to amplify the synthesized signal.

The small output compact repeater for the TV signal further includes a power supply for supplying power to at least one of the transmitter, the channel converter, the transmitter, and the main controller, wherein the power supply is at least one of a solar generator and a wind generator. It may further include any one.

The small output compact repeater for the TV signal stores power supplied from the solar generator or the wind turbine, and converts the power into a voltage level used in any one of the transmitter, the channel converter, the transmitter, and the main controller. The conversion unit may further include.

According to another aspect of the present invention, in a relay device for relaying a TV signal, a plurality of tuners for separating the input multi-channel broadcast signal for each channel, demodulating the broadcast signal separated from the tuner unit into an 8-VSB signal And a plurality of demodulators for correcting an error of an image signal included in the broadcast signal; A plurality of modulators for modulating each of the signals output to the plurality of demodulators into 8-VSB signals; A channel combiner configured to synthesize signals input from the plurality of modulators; An up-converter configured to frequency up the signal synthesized by the channel combiner; An amplifier for amplifying the signal output from the frequency upstream to have power of 10 mW or less per MHz; A main controller for controlling the frequencies of signals output from the plurality of modulators; And supplying power to at least one of the plurality of tuners, the plurality of demodulators, the plurality of modulators, the channel synthesizing unit, the frequency uplinking unit, and the main controller, and at least one of a solar generator and a wind generator. It is possible to provide a small output compact repeater for a TV signal comprising a power supply provided.

The plurality of modulators may output the same or different frequency as the input channel signal.

The plurality of modulators may output a modulated signal having a 6 MHz band, and the modulated signals may be signals having different center frequencies for each modulator, and a frequency interval between the different center frequencies may be 6 MHz.

The small output compact type repeater for the TV signal further includes a channel converter configured to modulate the modulated signal to a set frequency, wherein the channel converter generates a sine wave signal having a reference frequency and generates an intermediate frequency of the set frequency. The control oscillator may further include.

According to an embodiment of the present invention, the TV signal relay device of the present invention can transmit and receive a TV signal at low cost to a small astigmatism area by enabling low power transmission and reception.

According to another embodiment of the present invention, the TV signal relay apparatus of the present invention can transmit and receive multiple channels to secure various channel selection rights.

According to still another embodiment of the present invention, the TV signal relay of the present invention converts a plurality of received channels into another channel and reproduces and broadcasts a high quality broadcast signal as it is so that the quality of the transmission signal and the selectivity of the reception signal are excellent. The TV signal can be transmitted.

According to another embodiment of the present invention, the TV signal relay device of the present invention can be manufactured in a small size and light weight, and can be used indoors or outdoors.

According to another embodiment of the present invention, since the TV signal relay device of the present invention has a low power consumption and can be used for 24 hours by connecting with a solar power and wind power generation system without a separate commercial power source, the maintenance cost can be greatly reduced. Can be.

1 is a block diagram schematically showing a small output compact relay device for a TV signal according to an embodiment of the present invention;
FIG. 2 is a block diagram schematically showing a first embodiment of the signal repeater shown in FIG.
3 is a block diagram illustrating an example of a receiver shown in FIG. 2;
4 is a block diagram illustrating an embodiment of a channel converter.
5 is a block diagram showing a transmitter.
6 is a block diagram illustrating an example of a signal repeater according to a first embodiment of the present invention.
7 is a diagram illustrating an example of a five-channel signal repeater.
8 is a block diagram illustrating an example of a signal repeater according to a second embodiment of the present invention.
9 is a block diagram illustrating an example of a signal repeater according to a third embodiment of the present invention.

The present invention may be variously modified and have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In addition, numerals (e.g., first, second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

Hereinafter, a TV signal relay and a TV signal transmission system according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically illustrating a TV signal relay device according to an embodiment of the present invention.

Referring to FIG. 1, a small output compact relay apparatus for a TV signal according to an exemplary embodiment may include a power supply unit 30, a power converter 60, and a signal repeater 100.

In detail, the power supply unit 30 may use any one of the solar generator 40 and the wind generator 50, or may mix the solar generator 40 and the wind generator 50 into main power and auxiliary power. It generates and transmits to the signal repeater (100).

The solar generator 40 may supply power generated using the solar cell to the signal repeater 100. In addition, the wind power generator 50 may supply power generated using the wind power to the signal repeater 100.

The power converter 60 may supply power that meets the standard of the signal repeater 100. For example, the power converter 60 may convert the voltage level of the power supplied from the solar generator 40 into a voltage of a level usable by the signal repeater 100. In addition, the power converter 60 may convert the voltage level of the power supplied from the wind generator 50 into a voltage of a level usable in the signal repeater 100.

The power converter 60 may include a battery. The power converter 60 may include a battery that stores power supplied from the solar generator 40 or the wind generator 50, and may include a signal repeater at a time other than the operating time of the solar generator 40 or the wind generator 50. Power 100).

The power conversion unit 60 is an emergency power supply unit for converting into a DC voltage by receiving a commercial power supply in order to prevent the problem in the power supply when the operation of the solar generator 40 and the wind generator 50 is stopped. It may further include.

The signal repeater 100 may receive a plurality of broadcast channel signals and retransmit them into a plurality of broadcast channel signals. The signal repeater 100 may receive a plurality of broadcast channel signals, retransmit them to broadcast channels of the same frequency or different frequencies after undergoing a separate noise removing process for each channel.

The signal repeater 100 may output the power of the retransmitted broadcast channel signal to have a power of 10 mW or less per MHz.

The signal repeater 100 may receive and retransmit a terrestrial analog broadcast signal or a digital broadcast signal.

A detailed description of the signal repeater 100 will be described in more detail with reference to FIGS. 2 to 9.

2 is a block diagram schematically illustrating a first embodiment of the signal repeater illustrated in FIG. 1, FIG. 3 is a block diagram illustrating an example of a receiver illustrated in FIG. 2, and FIG. 5 is a block diagram illustrating an embodiment, and FIG. 5 is a block diagram illustrating a transmitter.

2 to 5, the signal repeater according to the first embodiment of the present invention may include a receiver 200, a channel converter 300, a transmitter 400, and a main controller 500.

In detail, the receiver 200 may filter, amplify, and transmit the multi-channel broadcast signal supplied from the antenna to the channel converter 300. In this case, the receiver 200 may filter again to remove noise included in the amplified signal before transmitting the amplified signal to the channel converter 300.

The receiver 200 may include a digital image signal module 210, a central processor 220, an oscillator 240, and a digital / analog converter 230 for digital signal processing.

The digital video signal module 210 may process digital video signals such as 8-VSB. When the digital video signal module 210 receives the digital video signal, the digital video signal module 210 decodes the MPEG-2 8-VSB signal and transmits it to the central processing unit 220.

When the error corrected signal is input to the central processing unit 220, the digital image signal module 210 modulates the signal and transmits the signal to the digital / analog converter 230.

The central processing unit 220 corrects an error of an image signal input from the digital image signal module 210 and transmits it to the digital image signal module 210.

The oscillator 240 transmits, for example, a signal having a frequency of 10.762 MHz to the digital / analog converter 230.

The digital / analog converter 230 converts an image signal input from the digital image signal module 210 into an analog signal of an intermediate frequency band and outputs the analog signal. In this case, the digital video signal module 210 and the digital / analog converter 230 may perform communication of I / Q 14-bit signals using a serial communication method.

The digital / analog converter 230 converts the intermediate frequency to 44 MHz and outputs the converted frequency.

The channel converter 300 converts the channel signal input from the receiver 200 into a channel signal having a set frequency and outputs the converted channel signal to the transmitter 400.

As shown in FIG. 4, the channel converter 300 may include a phase controlled oscillator 310 and an up-converter 320.

The phase controlled oscillator 310 transmits a signal of a specific frequency channel controlled by the main controller 500 to the up-converter 320.

The up-converter 320 mixes the signal input from the receiver 200 with a signal of a specific frequency channel to increase the frequency, down-converts the increased frequency again, and outputs the converted frequency to the transmitter 400.

For example, the up-converter 320 mixes a 1.2 GHz signal to a 44 MHz intermediate frequency signal to increase the frequency, and then mixes the 1.2 GHz signal again after filtering the signal having the raised frequency using the SAW filter. This allows down conversion to one channel in the 470-698MHz band.

The transmitter 400 combines the plurality of converted channel signals inputted from the channel converter 300 into one signal, amplifies them, and outputs them through an antenna.

As shown in FIG. 5, the transmitter 400 may include a channel combiner 410, a second amplifier 420, and a high output amplifier 430.

The channel combiner 410 synthesizes the converted channel signals input from the plurality of channels as one line.

The second amplifier 420 amplifies the synthesized signal into a signal having a predetermined gain. The second amplifier 420 is disposed in front of the high output amplifier 430 to amplify the signal to have a minimum size of the signal required by the high output amplifier 430. For example, the second amplifier 420 may use an amplifier having a 30 dB gain. In this case, the amplified signal is about -15 dBm.

The high output amplifier 430 amplifies a signal of the 470MHz ~ 698MHz band to a predetermined signal size. In this case, the high output amplifier 430 may amplify and output a signal to have power within 10 mW per MHz.

The high output amplifier 430 may use an amplifier having a gain of 30 dB, and the output signal size at this time is about 17 dBm per channel.

The main controller 500 controls the receiver 200 and the channel converter 300, and detects input and output levels of the receiver 200 and the transmitter 400 to maintain a constant magnitude of the output signal. The main controller 500 may select each channel of the receiver 200. For example, one of the frequencies of the input channel signal may be selected, and all of the plurality of channel signals may be selected.

In addition, the main controller 500 may set the frequency of the converted channel signal output from the channel converter 300. In this case, the main controller 500 may output a channel signal having the same frequency as that of the channel signal input to the receiver 200, and may output a channel signal having a different frequency.

According to an embodiment of the present disclosure, the receiver 200 may further include a first amplifier 260 that amplifies the output signal. The first amplifier 260 has a predetermined gain and may amplify the input signal according to the gain.

In addition, according to an embodiment of the present disclosure, the receiver 200 may further include a first filter unit 270 at an output terminal of the first amplifier unit 260. The first filter unit 270 may use a SAW filter, and filters the signal of the intermediate frequency band.

In addition, according to an embodiment of the present invention may further include an automatic gain control unit 280.

Automatic gain control unit 280 automatically maintains a constant output level of the relay. The automatic gain control unit 280 may include a detector and a variable attenuator.

The detector converts the intensity of the signal output from the receiver 200 into a DC voltage and transmits the signal to the main controller 500.

The variable attenuator may be controlled by the main controller 500 to attenuate the magnitude of the input signal so as to attenuate the signal magnitude from the main controller 500.

According to an embodiment of the present invention, the second filter unit 330 for filtering the channel-converted signal at the rear end of the channel converter 300, the variable gain attenuator 340 for attenuating the magnitude of the filtered signal, and a signal are detected. It may further include any one of the detection unit 350.

The second filter unit 330 may filter a signal for each channel using a band pass filter. The second filter unit 330 may use a filter that passes a signal in the 470MHz ~ 698MHz band.

The variable gain attenuation unit 340 is used to adjust the output of the repeater, and if the gain is adjusted from the main control unit 500 or is greater than or equal to a set value, the variable attenuation unit 340 may be attenuated.

The detector 350 may be used for adjusting the output level of the automatic gain controller 280 by converting the output level of the relay device into a DC voltage and transmitting the same to the main controller 500.

In this case, the main controller 500 does not control the automatic gain controller 280 when the level of the signal output from the detector 350 is within +/− 1 dB of the set level. However, when out of the set value, the automatic gain control unit 280 is controlled.

In the relay apparatus according to an embodiment of the present invention, five channels are transmitted, and the output level of each channel is 17 dBm when the five channels are transmitted, and the total output level is about 24 dBm when the five channels are transmitted.

7 is a diagram illustrating a five-channel signal repeater according to an embodiment of the present invention.

Referring to FIG. 7, the receiver 200 may include a plurality of tuners. Each tuner can output a signal of a set intermediate frequency. For example, a signal having a frequency that varies by 6 MHz with respect to 44 MHz may be output. For example, with five tuners, each tuner can select 32, 38, 44, 50, 56 MHz signals. The rear end of each tuner may be provided with an amplifier and a SAW filter.

Meanwhile, according to the present embodiment, a variable tuner capable of selecting any one frequency band from 32 to 56 MHz band may be used. In this case, the frequency of the variable tuner may be selected by the main controller 500.

According to an embodiment of the present invention, the tuner may include an oscillator for converting a multichannel broadcast signal into a baseband signal, and a mixer for mixing the multichannel broadcast signal and a signal supplied to the oscillator. Accordingly, error correction of the down-converted signal to the base band band may be performed.

8 is a block diagram schematically illustrating a signal repeater according to a second embodiment of the present invention.

Referring to FIG. 8, the signal repeater according to the second embodiment of the present invention includes a receiver 600, a channel combiner 700, an up-converter 800, an amplifier 900, and a main controller 500. do. In this case, the receiver 600 includes a plurality of tuners 610, a plurality of demodulators 620, and a plurality of modulators 630.

Here, the tuner 610, the main controller 500, the channel combiner 700, the up-converter 800, and the amplifier 900 are the same as the signal repeater of the first exemplary embodiment of the present invention, and thus overlap with each other. The description will be omitted.

In detail, the tuner 610 separates the input multi-channel broadcast signal according to a set frequency. For example, the tuner 610 may selectively output only a channel of a broadcast signal having a frequency equal to the frequency output from the frequency oscillator including the frequency oscillator.

According to the second embodiment of the present invention, each tuner unit 610 may include the above-mentioned frequency oscillator, and the main control unit 500 may change the frequency of each frequency oscillator.

The demodulator 620 demodulates the digital signal input from the tuner 610. Here, the digital signal is an MPEG-2 8-VSB modulated signal. The 8-VSB modulated signal is demodulated by the demodulator 620, and the error of the signal is corrected through the image signal processing process, where the error correction is noise removal and transmitted to the modulator 630.

The signal output from the demodulator 620 is input to the modulator 630. The digital image signal processed by the baseband signal in each demodulator 620 is modulated back into an 8-VSB signal by each modulator 630.

Here, the modulator 630 has a set frequency when modulating the 8-VSB signal and may modulate according to the set bandwidth. As illustrated in FIG. 8, five modulators 630 may generate a modulated signal to have a bandwidth of 6 MHz at each of five frequencies.

The modulator 630 may continuously perform the five frequencies at intervals of 6 MHz. Accordingly, since there is no empty signal in the middle, no advertisement is inserted at the time of channel selection, thereby providing convenience for the user to easily select the over-the-air signal.

Here, the modulator 630 may change the frequency output from each modulator 630 according to the frequency control signal input from the main controller 500.

The channel combiner 700 synthesizes signals input from the plurality of modulators 630.

The up-converter 800 upconverts and outputs the signal coupled from the channel combiner 700 through a carrier frequency. The up-converter 800 may include a frequency oscillator for oscillating a carrier frequency and a mixer for mixing the synthesized signal with the carrier frequency.

The amplifier 900 amplifies a signal of the 470MHz ~ 698MHz band to a predetermined signal size. At this time, the amplifier 900 may amplify and output the signal to have a power within 10mW per MHz. The amplifier 900 may use an amplifier having a gain of about 30dB. At this time, the signal output from the five channels is about 24dBm.

The amplifier 900 may amplify the signal in multiple stages as described in the first embodiment of the present invention.

The main controller 500 controls the tuner 610, the demodulator 620, and the modulator 630, and detects input and output levels of the tuner 610 and the modulator 630 to determine the magnitude of the output signal. Can be kept constant. The main controller 500 may reset each channel frequency.

Although not shown in the figure, the signal repeater according to the second embodiment of the present invention may further include a filter between the tuner 610 and the demodulator 620. The apparatus may further include an amplifier and an automatic gain control unit for amplifying the filter signal. Here, the filter, the amplifier and the automatic gain control unit may be the same components as described with reference to the first embodiment of the present invention.

In addition, a filter may be added between the modulator 630 and the channel combiner 700. In addition, a detector and an attenuator may be provided at the output of the modulator 630 to detect the magnitude of the output signal and adjust the magnitude of the signal to be equal to or less than a predetermined reference value.

9 is a block diagram schematically illustrating a signal repeater according to a third embodiment of the present invention. FIG. 9 has the same components as those of FIG. 8 except that the channel converter 650 is further provided. In the signal repeater according to the third exemplary embodiment of the present invention, the same components as those of the signal repeater described with reference to FIG. 8 use the same drawings, and redundant descriptions of the same components will be omitted.

The signal repeater according to the third embodiment of the present invention includes a tuner unit 610, a demodulator 620, a modulator 630, a channel converter 650, a channel combiner 700, and an up-converter 800. It may include an amplifier 900 and the main controller 500.

In detail, the tuner 610 separates the input multi-channel broadcast signal according to a set frequency.

The demodulator 620 demodulates the digital signal input from the tuner 610. Here, the digital signal is an MPEG-2 8-VSB modulated signal. The 8-VSB modulated signal is demodulated by the demodulator 620, and the error of the signal is corrected through the image signal processing process, where the error correction is noise removal and transmitted to the modulator 630.

The modulator 630 receives the digital signal processed by the demodulator 620 and modulates the 8-VSB signal.

The channel converter 650 modulates the signal input from the modulator 630 into a signal having a set frequency. The channel converter 650 may include a phase controlled oscillator for generating a set frequency. The channel converter 650 may modulate the signal input from the modulator 630 into a signal having a predetermined bandwidth according to the frequency generated by the phase control oscillator. Here, the bandwidth may be set within 6MHz.

Each channel converter 650 may convert a channel to a continuous intermediate frequency at intervals of 6 MHz.

The channel converter 650 may convert a channel to the same frequency as the frequency input from each tuner 610 or convert the channel to another frequency.

The channel combiner 700 synthesizes signals input from the plurality of channel converters 650.

The up-converter 800 upconverts and outputs the signal coupled from the channel combiner 700 through a carrier frequency. The up-converter 800 may include a mixer configured to mix the synthesized signal and the carrier frequency with the frequency oscillator oscillating the carrier frequency.

The amplifier 900 amplifies a signal of the 470MHz ~ 698MHz band to a predetermined signal size. At this time, the amplifier 900 may amplify and output the signal to have a power within 10mW per MHz. The amplifier 900 may use an amplifier having a gain of about 30 dB. At this time, the output signal size is about 24 dBm in total of 5 channels.

The amplifier 900 may amplify the signal in multiple stages as described in the first embodiment of the present invention.

The main controller 500 controls the tuner 610, the demodulator 620, the modulator 630, and the channel converter 650, and detects input and output levels of the tuner 610 and the modulator 630. It is possible to keep the size of the output signal constant. The main controller 500 may reset each channel frequency of the tuner 610. The main controller 500 may change the frequency for channel conversion of the channel converter 650.

Although not shown in the figure, the signal repeater according to the third embodiment of the present invention may further include a filter between the tuner 610 and the demodulator 620. The apparatus may further include an amplifier and an automatic gain control unit for amplifying the filter signal. Here, the filter, the amplifier and the automatic gain control unit may be the same components as described with reference to the first embodiment of the present invention.

In addition, a filter may be added between the channel converter 650 and the channel combiner 700. In addition, a detector and an attenuator may be provided at an output terminal of the channel converter 650 to detect the magnitude of the output signal and adjust the magnitude of the signal to be equal to or less than a set reference value.

According to an embodiment of the present invention, the receiver, the channel converter and the transmitter may be configured as one module. Accordingly, the relay device can be miniaturized and can be implemented to use the conventional high power only at low power.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.

30: power supply
40: solar generator
50: wind power generator
60: power conversion unit
100: Signal Repeater
200: Receiver
210: digital video signal module
220: central processing unit
230: digital / analog converter
240: oscillation unit
260: first amplifier
270: first filter unit
280: automatic gain control unit
300: channel conversion unit
310: phase controlled oscillator
320: up-converter
330: second filter unit
340: variable gain attenuation
350: detector
400: transmitter
410: channel coupling portion
420: second amplifier
430: high power amplifier
500: main control unit
600: receiver
610: tuner section
620: 8-VSB demodulator
630: 8-VSB demodulator
650: channel converter
700: channel coupling part
800: up-converter
900: amplification unit

Claims (20)

In the relay device for relaying a TV signal,
At least one tuner that separates the input multi-channel broadcast signal at predetermined frequency intervals for each channel, demodulates and decodes the channel signal separated for each channel into an 8-VSB signal, and separates each channel. A receiver which corrects and outputs an error of an image signal included in a channel signal;
A channel converter converting each channel signal output from the receiver into a channel signal of a set frequency using the sinusoidal signal input from a phase controlled oscillator for generating a sinusoidal signal having a reference frequency;
A transmitter for synthesizing the plurality of converted channel signals output from the channel converter and outputting a channel signal having a power of 10 mW or less per MHz; And
Monitoring the magnitude of the signal output from the channel converter so that the magnitude of the output signal is kept constant; the frequency of the phase controlled oscillator is equal to the frequency of the input channel signal, or of the input channel signal. A main control unit controlling the phase controlled oscillator so that a frequency different from the frequency is applied
Including, wherein the tuner separates each channel so that the multi-channel broadcast signal has a different center frequency, the different center frequency is selected up to five within the 32 to 56MHz band, the different center A small output compact relay device for a TV signal, wherein the interval between frequencies is 6 MHz, which is the predetermined frequency interval.
The method of claim 1,
The tuner is
An oscillator for converting the multi-channel broadcast signal into a baseband signal and a mixer for mixing the multi-channel broadcast signal and the signal supplied to the oscillator further comprises a small output compact type TV repeater.
The method of claim 2,
The main control unit
A small output compact repeater for a TV signal, characterized in that for controlling the frequency of the oscillator included in the tuner.
delete The method of claim 1,
And a first filter unit for filtering the separated channel signal at a rear end of the tuner.
delete The method of claim 5, wherein
And a first amplifier unit for amplifying a signal output from the tuner between the tuner and the first filter unit.
The method of claim 5, wherein
The small output compact relay device for a TV signal further comprising an automatic gain control unit for detecting and attenuating the signal magnitude of each channel output from the receiving unit.
The method of claim 5, wherein
An up-converter for converting each channel signal to an uplink frequency before the first filter unit; And
And a down converter for converting the signal filtered by the first filter unit to a downlink frequency.
The method of claim 1,
The receiving unit
A digital video signal module which demodulates and decodes the channel signal input for each channel into an MPEG-2 8-VSB signal and modulates an error-corrected signal;
A central processing unit for correcting the error of the signal input from the digital video signal module and transmitting the error corrected signal to the digital video signal module;
A digital / analog converter for converting a signal input from the digital video signal module into an analog signal; And
And a oscillator for transmitting a sine wave signal having a frequency set in the digital / analog converter.
The method of claim 1,
And a second filter unit for filtering each converted channel signal output from the channel converter.
The method of claim 11,
And a signal attenuating unit which attenuates when the magnitude of each converted channel signal output from the second filter unit is equal to or larger than a set value.
The method of claim 11,
And a channel combiner for combining the respective converted channel signals.
delete The method of claim 1,
Further comprising a power supply for supplying power to at least one of the receiver, the channel converter, the transmitter and the main controller,
The power supply unit is a small output compact relay device for a TV signal further comprising at least one of a solar generator or a wind generator.
The method of claim 15,
And a power converter configured to store power supplied from the solar generator or the wind generator, and convert the power supplied to the voltage level used by any one of the receiver, the channel converter, the transmitter, and the main controller. Small output compact repeater for TV signals.
In the relay device for relaying a TV signal,
A plurality of tuners configured to separate the input multi-channel broadcast signal for each channel in the 32 to 56 MHz band;
A plurality of demodulators which demodulate the broadcast signal separated from the tuner into an 8-VSB signal and correct an error of an image signal included in the broadcast signal;
A plurality of modulators for modulating each of the signals output to the plurality of demodulators into 8-VSB signals;
A channel combiner configured to synthesize signals input from the plurality of modulators;
An up-converter for frequency-upping and outputting the signal synthesized by the channel combiner;
An amplifier for amplifying the signal output from the up-converter to have power of 10 mW or less per MHz;
A main controller for controlling frequencies of signals output from the plurality of modulators
The electric power is supplied to at least one of the plurality of tuners, the plurality of demodulators, the plurality of modulators, the channel combiner, the up-converter, and the main controller, and includes at least one of a solar generator and a wind generator. One power supply and
Power conversion unit including a battery for supplying power even at a time other than the operating time of the solar generator and wind power generator
Wherein the plurality of modulators output a modulated signal, wherein the modulated signal is a signal having a different center frequency for each modulator, and the spacing between the different center frequencies is 6 MHz. Mold repeater.
The method of claim 17,
And the plurality of modulators output the same or different frequencies as the input channel signals.
The method of claim 17,
The battery stores power supplied from at least one of the solar generator and the wind generator.
A small output compact repeater for a TV signal, characterized in that.
The method of claim 17,
Further comprising a channel converter for modulating the modulated signal to a predetermined frequency,
And the channel converter generates a sine wave signal having a reference frequency and further comprises a phase controlled oscillator for generating an intermediate frequency of the set frequency.

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