KR20100077541A - Device and method for receiving signals of multi band - Google Patents

Abstract

PURPOSE: A device and a method for receiving signals of multi band are provided to receive satellite broadcasting receiver of Ka band and satellite broadcasting receiver of a Ku band at the same time. CONSTITUTION: A second receiver(120) receives a satellite broadcasting signal of Ku band. The second receiver performs amplification and frequency conversion of satellite broadcasting signal of the received Ku band. The second receiver generates the second signal. A DACU(Dual Antenna Control Unit)(130) synthesizes a signal which is a remainder substitution of the first signal which excluded the second signal and generated second signal. The DACU generates a third signal. The DACU transmits the generated third signal to a set up box.

Description

Apparatus and method for receiving multi-band signals {DEVICE AND METHOD FOR RECEIVING SIGNALS OF MULTI BAND}

The present invention relates to a multi-band signal receiving apparatus and a method thereof capable of simultaneously receiving and processing signals of multiple bands, and more particularly, to a device for simultaneously receiving a signal of a Ku band band and a signal of a Ka band band to a set top box. And to a method thereof.

Recently, with the rapid development of digital technologies such as digital image compression and digital modulation / demodulation, the standardization and commercialization of digital television (TV) broadcasting has been rapidly developed. Under these circumstances, satellite broadcasting services using geostationary satellites have been commercialized.

Today, the field of satellite communication services using geostationary satellites is undergoing rapid changes.

As the frequencies of the C band and Ku band, which are widely used around the world, are depleted, the frequency of use of satellite broadcasting services is shifting to the Ka band, and the manufacturing technology of satellites is also advanced, so that OBP (On-Board Processing) or Switching Matrix In order to improve the performance of satellite link, it is possible to develop small, low-cost, high-performance earth station by developing transmission / reception earth station development technology.

The satellite broadcasting service using the Ka band has several advantages over the satellite broadcasting service using the Ku band. Recently, due to the depletion of the frequency resources and reflecting the advantages of the Ka band, the conventional Ku-band satellite broadcasting service and Ka-band satellite broadcasting service are used in parallel. However, there is a problem in that signals in the Ka band and the Ku band must be received by different antennas, and devices for transmitting each signal to the set-top box must also be distinguished by antenna.

An object of the present invention is to provide an apparatus for receiving a Ka-band satellite broadcast signal and a Ku-band satellite broadcast signal simultaneously.

The present invention aims to reduce the cost of a satellite broadcast receiver by reducing the number of devices for receiving signals of multiple bands.

The present invention aims to improve processing speed and reduce system load by processing satellite broadcast signals received by a plurality of antennas using one device.

The multi-band signal receiving apparatus according to an embodiment of the present invention receives a Ka-band satellite broadcast signal and amplifies and frequency-converts the received Ka-band satellite broadcast signal to generate a first signal. A second signal generator for receiving a Ku-band satellite broadcast signal, amplifying and frequency-converting the received Ku-band satellite broadcast signal, and generating a second signal, and the second signal from the generated first signal And a dual antenna processor configured to generate a third signal by synthesizing the signals of the remaining bands excluding the band and the generated second signal, and transmitting the generated third signal to a set top box.

A multi-band signal receiving apparatus according to another embodiment of the present invention receives a Ka-band satellite broadcast signal from a first antenna for receiving a Ka-band satellite broadcast signal and controls the first antenna. Receiving a Ku-band satellite broadcast signal from a second antenna receiving a Ku-band satellite broadcast signal, a second antenna control unit controlling the second antenna, and processing the satellite broadcast signal of the Ka band to a first signal And a first signal generator for generating a second signal, a second signal generator for processing a satellite broadcast signal of the Ku band to generate a second signal, and a signal synthesizer for synthesizing the first signal and the second signal.

According to another aspect of the present invention, there is provided a method for receiving a multi-band signal, generating a first signal by receiving a Ka-band satellite broadcast signal and amplifying and frequency converting the received Ka-band satellite broadcast signal. Receiving a satellite broadcast signal, and amplifying and frequency converting the satellite broadcast signal of the received Ku band to generate a second signal, and generating the second signal from the band except for the band of the second signal. And synthesizing a signal with the generated second signal to generate a third signal, and transmitting the generated third signal to a set top box.

According to an embodiment of the present invention, an apparatus for simultaneously receiving a satellite broadcast signal of Ka band and a satellite broadcast signal of Ku band may be provided.

According to one embodiment of the present invention, by reducing the number of devices for receiving signals of multi-band, it is possible to reduce the cost of the satellite broadcast receiver.

According to one embodiment of the present invention, it is possible to conveniently control the direction of the antenna to the satellite using one device.

According to an embodiment of the present invention, by using a single device, by processing a satellite broadcast signal received by a plurality of antennas can improve the processing speed and reduce the system load.

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

1 is a block diagram illustrating a multi-band signal receiving apparatus 100 according to an embodiment of the present invention.

The multi-band signal receiving apparatus 100 according to an embodiment of the present invention includes a first receiver 110, a second receiver 120, and a dual antenna processor 130.

Specifically, the first receiver 110 receives a Ka-band satellite broadcast signal, and processes the received Ka-band satellite broadcast signal into a signal that can be processed in the set-top box. To this end, the first receiver 110 includes a first antenna 111 and a low noise block down converter (112) for receiving a satellite broadcast signal of approximately 20.2Ghz from approximately 18.3Ghz.

A reflector antenna may be used as the first antenna 111. Reflector antennas are commonly used for satellite communications, high-capacity wireless communications, and the like, and focus the transmitted / received signals on at least one focal point using the principle of a reflective telescope. In the reflector antenna, at least one horn antenna may be installed at the focal point of the reflector, where a parabolic antenna may be used as the reflector antenna.

The satellite broadcast signal of 20.2Ghz at 18.3Ghz received through the first antenna 111 of the first receiver 110 is reflected from the reflector and input to the horn antenna, and the horn antenna collects the reflected signals and collects a low noise amplifier / converter ( 112). The low noise amplification / converter 112 amplifies the satellite broadcast signal of 20.2Ghz at 18.3Ghz and down to 2150Mhz at 250Mhz to generate a first signal.

Similar to the first receiver 110, the second receiver 120 receives a Ku-band satellite broadcast signal and processes the received Ku-band satellite broadcast signal into a signal that can be processed in the set-top box.

The second receiver 120 includes a second antenna 121 and a low noise amplification / converter 122 for receiving a satellite broadcast signal of about 12.2 GHz to 12.7 GHz. Like the first receiver 110, the second antenna 121 may be a reflector antenna represented by a parabolic antenna.

The satellite broadcast signal of 12.7Ghz at 12.2Ghz received through the second antenna 121 of the second receiver 120 is reflected from the reflector and input to the horn antenna, and the horn antenna collects the reflected signals and collects a low noise amplifier / converter ( 122). The low noise amplification / converter 122 amplifies the satellite broadcast signal of 12.7Ghz at 12.2Ghz and down to an intermediate frequency band of the frequency band of 950Mhz to 1450Mhz to generate a second signal.

The low noise amplification / converters 112 and 124 have a small noise figure and amplify and frequency convert satellite broadcast signals transmitted to the antennas 111 and 121 into signals of an intermediate frequency band, respectively. In general, in a satellite broadcasting system, when a multi-band signal transmission / reception device operates as a receiver, low noise amplification / transducers 112 and 124 are used as a processing device to transmit a signal to a set top box.

In the present invention, only one low noise amplifier / transformer 112 and 122 is shown for each band signal, but it is apparent that a plurality of low noise amplifier / converters may be connected to each band signal.

The multi-band (Ka band and Ku band) satellite broadcast signals, ie, the first signal and the second signal, whose frequencies are down and amplified by the first receiver 110 and the second receiver 120, are dual antenna processor 130. ) Is entered. Thereafter, the dual antenna processor 130 synthesizes the input first signal and the second signal, generates a third signal, and transfers the generated third signal to the set top box to provide the user.

Specifically, the dual antenna processing unit 130 (DACU, Dual Antenna Control Unit) according to an embodiment of the present invention may generate at least two antenna control units 131 and 133 and a specific band to generate a third signal. Filters 132 and 134 for accepting or removing only the signal of?. In addition, a signal synthesizer 135 for synthesizing the output of the filters 132 and 134 is included.

First, the first antenna control unit 131 communicates with the first antenna 111 of the first receiver 110 to perform an operation of monitoring or controlling the first antenna 111. In addition, the first antenna control unit 131 receives the channel signal of the set-top box to perform polarization and target satellite change of the first antenna 111.

Thereafter, the output of the first antenna control unit 131 includes a band rejection filter (BRF) 132 to remove only a specific band and to receive only signals of the remaining band that are not removed. For example, the BRF 132 passes only signals of 250 MHz to 750 MHz and 1650 MHz to 2150 MHz bands from the 250 MHz to 2150 MHz band signal, which is the output signal of the low noise amplifier / converter 112, through the second receiver 120. Filter to see if possible. This is to prevent the output of the BRF 132 from overlapping the band of the band 950Mhz to 1450Mhz, which is the output of the signal of the Ku band, and a guard band is applied.

In addition, the output of the second antenna control unit 133 includes a band pass filter (BPF) 134 to remove only a specific band and to receive only signals of the remaining band that are not removed. As a specific example, the BPF 134 removes signals in a band deviating from the band 1450Mhz at 950Mhz, which is an output signal of the low noise amplifier / converter 122. That is, the BPF 134 generates a second signal that is not distorted by the first signal by removing bands that may interfere with the first signal in addition to the 1450 MHz band at 950 MHz.

As a result, the first signal based on the output of the first antenna control unit 131 and the second signal based on the output of the second antenna control unit 133 are respectively filtered through different filters and are generated so that interference does not occur between each other. do.

Next, the first signal and the second signal are combined through the signal combiner 135. If part of the first signal and the second signal interfere with each other, the combination of the first signal and the second signal will generate a distorted signal different from the original signal in each band. However, since the first signal and the second signal are respectively filtered by the BRF 132 and the BPF 134 in different frequency bands, mutual interference does not occur even when combined. This will be described in detail with reference to FIG. 2.

FIG. 2 is a diagram illustrating a third signal obtained by combining a Ka band satellite broadcast signal and a Ku band satellite broadcast signal according to an embodiment of the present invention.

Referring to FIG. 2, the satellite broadcast signal from the first receiver is processed into an output signal in the 250Mhz to 2150Mhz band through the low noise amplifier / converter 112. In addition, the processed signal is a signal of the Ka-low band 201 of 250Mhz to 750Mhz and the Ka-high band of 2150Mhz to 1650Mhz, including a portion overlapping the Ku band by the first antenna control unit 131 Band rejection filtering is performed so that only 203 remains. It is generally possible for a signal in the Ka band to have no data in the 950 MHz to 1450 MHz signal, which corresponds to the Ku band. Therefore, in the present invention, a specific band in which no data exists in the first signal can be removed, and a second signal can be synthesized in this specific band.

In addition, the band-pass filtering of the satellite broadcast signal from the second receiver through the low-noise amplifier / converter 122 so that only the second signal including only the signal 202 in the 950 MHz to 1450 MHz band remains in consideration of the guard band. do. In addition, the band rejection filtered first signal 201 and 203 and the band pass filtered second signal 202 are synthesized in a band not interfering with each other and synthesized into a third signal 201, 202, and 203. do.

That is, the signal 201 of the Ka-low band and the signal 202 based on the Ku band are 750Mhz which is the band where the signal 201 of the Ka-low band ends at 950Mhz which is the start band of the signal 202 based on the Ku band. The guard band is divided into as much as 200Mhz, and the signal 202 based on the Ku band is 200Mhz from 1450Mhz, which is the band where the signal 202 ends, to 1650Mhz, which is the band where the signal 203 of the Ka-high band starts. It is divided into guardbands. Accordingly, the first signal including the Ka-low band signal 201 and the Ka-high band signal 203 and the second signal including the Ku band based signal 202 are the third signals without mutual interference. Can be synthesized. Thus, by using the multi-band signal reception apparatus according to the present invention, only one device can simultaneously receive the Ka-band satellite broadcast signal and the Ku-band satellite broadcast signal.

The third signal according to an embodiment of the present invention may be used as an input of the set top box. At this time, when the set-top box tunes the signal of the Ka-low band 201 according to the user's input, a broadcast corresponding to the signal of the Ka-low band 201 may be output through the display device. Similarly, if the set-top box tunes either the signal 202 based on the Ku band or the signal 203 of the Ka-high band, the display device may output the corresponding broadcast. As a result, using the multi-band signal reception apparatus according to the present invention, a plurality of devices are not required for processing signals of different bands, and a single device that can be applied to a plurality of antennas in common can be used for multi-band signals. Can be processed.

3 is a flowchart illustrating a multi-band signal receiving method according to an embodiment of the present invention.

Referring to FIG. 3, first, in step 301, a multi-band signal receiving apparatus according to an embodiment of the present invention receives a Ka-band satellite broadcast signal, and in step 302 amplifies and amplifies the received Ka-band satellite broadcast signal. The transform generates a first signal. For example, the satellite broadcast signal of the Ka band is a signal in the band of about 18.3Ghz to 20.2Ghz, and may be frequency-converted into a first signal having an intermediate frequency of 250Mhz to 2150Mhz.

Next, independent of the steps 301 and 302 in step 303, the multi-band signal receiving apparatus receives a Ku-band satellite broadcast signal, and in step 304 amplifies and frequency-converts the received Ku-band satellite broadcast signal. Generate a second signal. As an example, the satellite broadcast signal of the Ku band may be a frequency signal of approximately 12.2Ghz to 12.7Ghz band, and may be frequency-converted into a second signal having an intermediate frequency of 950Mhz to 1450Mhz band.

A low noise amplifier / converter may be used to convert the amplitude and frequency of the Ka-band satellite signal and the Ku-band satellite signal. The low noise amplifier / converter according to the present invention can process signals with various polarizations using RF probes, and amplify and frequency convert the processed signals. That is, the low noise amplification / converter may process a signal having vertical polarization or horizontal polarization according to the position of one RF probe, and may process a signal having vertical / horizontal double polarization using two RF probes. The low noise amplification / converter may also use a polarizer and two RF probes to process signals with circular polarization. In this case, when a signal having right hand circular polarization (RHCP) is detected through one RF probe, a signal having left hand circular polarization (LHCP) is detected through the other RF probe. It can also be detected.

A portion where the first signal and the second signal overlap each other occurs. However, in general, there is no data in the band of 950Mhz to 1450Mhz in the signal generated from the Ka band. Using this, in step 305 a third signal is generated from the first signal and the second signal.

Specifically, the multi-band signal receiving apparatus according to an embodiment of the present invention filters only signals of the remaining bands excluding the band of the second signal from the generated first signal. At this time, it can be filtered considering the guard band of 200Mhz. That is, only signals in the band of 250Mhz to 750Mhz and 1650Mhz to 2150Mhz can be filtered from the first signal. For example, signals of the remaining bands except for the band of the second signal from the generated first signal may be filtered using a band rejection filter (BRF).

As another example, a signal of a band and a guardband band overlapping the first signal may be removed from the generated second signal. That is, in order to reduce the possibility that the first signal and the second signal are mutually interference, only a pure second signal is extracted by filtering a signal in a band in which interference of the first signal exists.

The processed first and second signals are synthesized to produce a third signal, which is then sent to the set top box for output.

As described above, using the multi-band signal reception method according to an embodiment of the present invention, it is possible to reduce the cost of the satellite broadcast receiver by reducing the number of devices for receiving the signals of the multi-band. In addition, by using a single device, by processing a satellite broadcast signal received by a plurality of antennas can improve the processing speed and reduce the system load.

4 is a block diagram illustrating a multi-band signal receiving apparatus 400 according to another embodiment of the present invention.

Referring to FIG. 4, the multi-band signal receiving apparatus 400 includes a first antenna control unit 410, a first signal generator 420, a second antenna control unit 430, and a second signal generator 440. , And a signal synthesizer 450.

First, the first antenna control unit 410 receives a Ka-band satellite broadcast signal from a first antenna that receives a Ka-band satellite broadcast signal, and the first signal generator 420 receives the Ka-band satellite broadcast signal. Process to generate a first signal.

In addition, the second antenna control unit 430 receives the Ku-band satellite broadcast signal from the second antenna that receives the Ku-band satellite broadcast signal, and processes the satellite broadcast signal of the Ku band to generate a second signal. .

The first antenna control unit 410 may control the first antenna to receive the satellite broadcasting signal of the Ka band. In addition, the second antenna control unit 430 may control the second antenna to receive the satellite broadcast signal of the Ku band.

In detail, the first antenna control unit 410 and the second antenna control unit 430 may control the first antenna and the second antenna to be directed toward the target satellite.

The signal synthesizer 450 synthesizes the first signal and the second signal.

In detail, the signal synthesizing unit 450 generates a third signal by synthesizing the second signal with the signals of the remaining bands excluding the band of the second signal from the first signal, and sets the generated third signal. Can be sent to a set top box.

Accordingly, one device may perform antenna control and monitoring by communicating with two antennas, respectively, and perform polarization and target satellite change of antennas under the control of the set-top box. Can be.

As a result, when using the multi-band signal receiving apparatus according to an embodiment of the present invention, it is possible to conveniently control the direction of the antenna to the satellite using one device.

The multi-band signal reception method according to the present invention can be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

1 is a block diagram illustrating a multi-band signal receiving apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a third signal obtained by combining a Ka band satellite broadcast signal and a Ku band satellite broadcast signal according to an embodiment of the present invention.

3 is a flowchart illustrating a multi-band signal receiving method according to an embodiment of the present invention.

4 is a block diagram illustrating a multi-band signal receiving apparatus according to another embodiment of the present invention.

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

100: multi-band signal receiving device

110: first receiving unit

120: second receiving unit

130: dual antenna processing unit

Claims (11)

A first signal generator configured to receive a Ka-band satellite broadcast signal and generate a first signal by amplifying and frequency converting the received Ka-band satellite broadcast signal; A second signal generator configured to receive a Ku-band satellite broadcast signal, and generate a second signal by amplifying and frequency-converting the received Ku-band satellite broadcast signal; And The third signal is generated by synthesizing the generated second signal with the signals of the remaining bands excluding the band of the second signal from the generated first signal, and the set top box is used as a set top box. Dual antenna processing unit to transmit to Multi-band signal receiving apparatus comprising a. The method of claim 1, The dual antenna processing unit includes a band rejection filter (BRF), The BRF is a multi-band signal receiving apparatus, characterized in that for extracting only the signals of the remaining band except the band of the second signal from the generated first signal. The method of claim 1, The dual antenna processing unit includes a band pass filter (BPF), The BPF is a multi-band signal receiving apparatus, characterized in that for removing the signal of the band overlapping the first signal from the generated second signal. The method of claim 1, The satellite broadcasting signal of the Ka band is a signal of the frequency band from 18.3GHz to 20.2GHz, the satellite broadcasting signal of the Ku band is a signal of the frequency band of 12.2GHz to 12.7GHz . The method of claim 1, At least one of the first signal generator and the second signal generator includes a low noise amplification / converter for amplifying and frequency converting a satellite broadcasting signal of Ka band or Ku band. Multi-band signal receiving device characterized in that. A first antenna control unit for receiving a Ka-band satellite broadcast signal from a first antenna for receiving a Ka-band satellite broadcast signal and controlling the first antenna; A second antenna control unit for receiving a Ku-band satellite broadcast signal from a second antenna for receiving a Ku-band satellite broadcast signal and controlling the second antenna; A first signal generator configured to process the satellite broadcast signal of the Ka band to generate a first signal; A second signal generator configured to process the satellite broadcast signal of the Ku band to generate a second signal; And A signal synthesizer for synthesizing the first signal and the second signal Multi-band signal receiving apparatus comprising a. The method of claim 6, The signal synthesizing unit generates a third signal by synthesizing the second signal with the signals of the remaining bands excluding the band of the second signal from the first signal, and setting the generated third signal into a set top box. Multi-band signal receiving apparatus, characterized in that for transmitting. The method of claim 6, And the first antenna control unit and the second antenna control unit control each of the first antenna and the second antenna to be directed toward a target satellite. Receiving a satellite broadcast signal of the Ka band, and amplifying and frequency converting the received satellite broadcast signal of the Ka band to generate a first signal; Receiving a Ku-band satellite broadcast signal, and amplifying and frequency converting the received Ku-band satellite broadcast signal to generate a second signal; And The third signal is generated by synthesizing the generated second signal with the signals of the remaining bands excluding the band of the second signal from the generated first signal, and the set top box is used as a set top box. To send to) Multi-band signal receiving method comprising a. 10. The method of claim 9, Generating the third signal and transmitting the generated third signal to a set top box; The signals of the remaining bands excluding the band of the second signal from the generated first signal are generated by controlling a band of the second signal in the first signal using a band rejection filter (BRF). Multiband signal reception method. 10. The method of claim 9, The generating of the third signal and transmitting the generated third signal to a set top box may include: Removing a signal of a band overlapping the first signal from the generated second signal Multi-band signal receiving method comprising a.

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