KR102541372B1 - Radio system and control method and vehilce including thereof - Google Patents

Abstract

A radio system, a control method of the radio system, and a vehicle are provided. In a radio system according to an embodiment, a tuner unit performing a receivable frequency scan and a frequency table for which the tuner unit scans are provided, and a first tuner included in the tuner unit generates a signal of a frequency of a first region among all frequencies and a control unit for controlling the second tuner to scan signal strengths of frequencies other than those in the first range when scanning signal strength.

Description

Radio system, radio control method and vehicle including the same {RADIO SYSTEM AND CONTROL METHOD AND VEHILCE INCLUDING THEREOF}

The present invention relates to a vehicle, and relates to a radio system provided in the vehicle and a method for controlling the same.

Typically, existing integrated radio antennas provide services such as radio, DAB broadcasting, LTE, and GNSS. In Europe, FM and DAB broadcasting are currently used interchangeably using RDS service. As digital technology develops, there is a tendency to change to DAB instead of FM broadcasting, so the importance of DAB service quality is increasing.

In areas with poor signal environment (weak electric field/multipath), the quality of DAB reception performance may deteriorate. Currently, integrated radio antennas use DAB single antennas. For the diversity of the DAB antenna, two antennas are required, and there is a space limitation to add an antenna for diversity in the current shark fin antenna size.

In general, a radio frequency (RF) tuner for receiving the terrestrial DMB ensemble desired by the user processes the received ensemble, and includes a DMB DSP for filtering and transmitting service components constituting the service selected by the user within the ensemble. and receives the service component filtered by the DMB DSP, receives the decoded data from the decoder unit for decoding and transmitting the input service component in the form of outputable data, and outputs it in a form desired by the user. .

In the case of such a general DMB terminal, since it has one RF tuner, it can receive only one ensemble. That is, when the DMB terminal is turned on, the control unit first controls a single RF tuner to scan the entire frequency band to create ensemble list information and to create a service list (Electronic Program Guide, hereinafter referred to as "EPG") for each ensemble. . And the SI (Service Information) of the ensemble collected in this way becomes the basis of information for selecting a program (service) that the user wants to watch.

Once the user selects a service based on the EPG information collected in this way, the RF tuner is tuned to the frequency at which the ensemble is transmitted to play the service, and the DMB DSP is a service component constituting the service selected by the user within the ensemble. is filtered and transmitted to the decoder.

In addition, the decoder unit receiving the service component constituting the service decodes each service component data into an outputable form, and hands it over to the application unit to display the data in a form desired by the user.

However, in the case of existing DMB terminals, since there is only one RF tuner, if a user is watching a specific program (service) or scanning an ensemble, data from ensembles of different frequency bands cannot be received at the same time, which limits the service. There is a problem.

Therefore, even when two tuners are configured in one terminal, if one tuner is listening to radio or watching DMB with a specific frequency, when you want to tune in to all frequencies, you must select all frequency channels with the other tuner, which prevents the scanning operation. There was a problem with taking a long time.

Registered Patent Publication KR 10-0810238 B1

The present invention was invented to solve the above problems, and is intended to shorten the frequency scan time by increasing the number of tuners with respect to a conventional radio apparatus including two tuners.

In addition, the disclosed embodiment aims to minimize reception errors occurring during frequency scanning.

A radio system according to one aspect includes a tuner unit performing a receivable frequency scan; and the tuner unit provides a frequency table for scanning, and when a first tuner included in the tuner unit scans the signal strength of a frequency of a first region among all frequencies, a second tuner performs a scan of the first region. and a control unit controlling to scan the signal strengths of frequencies other than the frequency, wherein the control unit controls the first tuner to scan at least the first tuner for a frequency having an electric field strength greater than a first threshold strength after the signal strength is scanned by the tuner unit. One parameter scan may be performed, and the second tuner may be controlled to perform the at least one parameter scan for all frequencies.

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Also, a GPS receiving unit that acquires GPS data is further included, and the control unit may control at least one tuner included in the tuner unit to scan an effective frequency obtained from the GPS receiving unit.

In addition, the second tuner detects an effective frequency acquired from the GPS receiver, and the first tuner additionally scans an effective frequency detected by the second tuner that is not included in the effective frequencies acquired during the full frequency scan. can

Also, the effective frequency acquired by the first tuner during full frequency scanning may be a frequency at which the electric field strength is greater than the first threshold and the noise is less than the second threshold.

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In addition, the control unit may perform the above-mentioned analysis on a frequency that is not included in a frequency greater than the first threshold intensity scanned by the first tuner among effective frequencies acquired by the second tuner through at least one parameter scan for all frequencies. The first tuner can be controlled to scan.

A vehicle according to another aspect includes a radio tuner unit configured to scan a receivable frequency; and the tuner unit provides a frequency table for scanning, and when a first tuner included in the tuner unit scans the signal strength of a frequency of a first region among all frequencies, a second tuner performs a scan of the first region. and a radio control unit configured to scan signal strengths of frequencies other than a frequency, wherein the radio control unit, for a frequency having an electric field strength greater than a first threshold strength after the radio tuner unit scans the signal strength, performs the first signal strength scan. The tuner may perform at least one parameter scan, and the second tuner may perform the at least one parameter scan for all frequencies.

The radio control unit may control at least one tuner included in the tuner unit to scan an effective frequency acquired by the GPS receiver.

In addition, the radio control unit detects an effective frequency obtained by the second tuner from the GPS receiver, and an effective frequency detected by the second tuner that is not included in the effective frequencies obtained by the first tuner during a total frequency scan can be additionally scanned.

Also, the effective frequency obtained by the first tuner during full frequency scanning may be a frequency at which the electric field strength is greater than the first threshold and the noise is less than the second threshold.

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In addition, the radio control unit may, among effective frequencies acquired by the second tuner through at least one parameter scan for all frequencies, for a frequency that is not included in a frequency greater than the first threshold intensity scanned by the first tuner, The first tuner may be controlled to scan.

A control method of a radio system according to another aspect includes performing a receivable frequency scan; and providing a frequency table for performing the receivable frequency scan; wherein, when the first tuner scans the signal strength of a frequency in a first area among all frequencies, a second tuner scans the signal strength of a frequency in the first area. and controlling to scan signal strengths of frequencies other than the frequency, and scanning the signal strengths, after scanning the signal strengths, for a frequency whose electric field strength is greater than a first threshold strength, the first threshold strength. and controlling the first tuner to perform at least one parameter scan and the second tuner to perform the at least one parameter scan for all frequencies.

In addition, acquiring GPS through the GPS receiver; and controlling at least one tuner to scan an effective frequency obtained from the GPS receiver.

Also, detecting, by the second tuner, an effective frequency obtained from the GPS receiver; and additionally scanning an effective frequency detected by the second tuner that is not included in the effective frequencies acquired during the full frequency scan by the first tuner.

Also, the effective frequency acquired by the first tuner during full frequency scanning may be a frequency at which the electric field strength is greater than the first threshold and the noise is less than the second threshold.

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In addition, for a frequency that is not included in frequencies greater than the first threshold intensity scanned by the first tuner among effective frequencies acquired by the second tuner through at least one parameter scan for all frequencies, the first tuner Controlling to scan; may further include.

According to the disclosed embodiment, the frequency scan time can be reduced by increasing the number of tuners with respect to a conventional radio apparatus including two tuners.

In addition, the disclosed embodiment can increase accuracy in frequency scanning.

1 is an exemplary view of a vehicle equipped with an antenna device according to an embodiment.
2 is an exemplary interior view of the vehicle shown in FIG. 1;
3 is a schematic diagram showing a control block diagram of a radio system and other vehicular electronic devices.
4 to 7 are schematic diagrams illustrating a scanning method of a radio system according to an exemplary embodiment.
8 and 9 are flowcharts of a method for scanning a radio system according to an exemplary embodiment.

Like reference numbers designate like elements throughout the specification. This specification does not describe all elements of the embodiments, and general content or overlapping content between the embodiments in the technical field to which the present invention belongs is omitted. The term 'unit, module, member, or block' used in the specification may be implemented as software or hardware, and according to embodiments, a plurality of 'units, modules, members, or blocks' may be implemented as one component, It is also possible that one 'part, module, member, block' includes a plurality of components.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case of being directly connected but also the case of being indirectly connected, and indirect connection includes being connected through a wireless communication network. do.

In addition, when a certain component is said to "include", this means that it may further include other components without excluding other components unless otherwise stated.

Throughout the specification, when a member is said to be located “on” another member, this includes not only a case where a member is in contact with another member, but also a case where another member exists between the two members.

Terms such as first and second are used to distinguish one component from another, and the components are not limited by the aforementioned terms.

Expressions in the singular number include plural expressions unless the context clearly dictates otherwise.

In each step, the identification code is used for convenience of description, and the identification code does not explain the order of each step, and each step may be performed in a different order from the specified order unless a specific order is clearly described in context. there is.

Hereinafter, embodiments will be described with reference to the accompanying drawings.

1 is an exemplary view of a vehicle equipped with an antenna device according to an embodiment, and FIG. 2 is an exemplary interior view of the vehicle shown in FIG. 1 .

The vehicle 1 is a device that drives by driving wheels for the purpose of transporting people or cargo, and moves on a road.

The vehicle 1 includes a body having interior and exterior parts, and a chassis on which mechanical devices required for driving are installed except for the body.

As shown in FIG. 1, the exterior 110 of the vehicle body includes a front panel 111, a bonnet 112, a roof panel 113, a rear panel 114, a trunk 115, front and rear doors 116, and the like. include

In addition, the exterior of the vehicle body is the front panel 111, the bonnet 112, the roof panel 113, the rear panel 114, the trunk 115, and the window glasses 117a, 117b, and 117c provided on the front and rear doors 116 , and further includes a pillar 118 provided at a boundary between the front, rear, left, and right window glasses 117a, 117b, and 117c.

Further, the window glasses 117a, 117b, and 117c installed on the front, rear, left, and right doors include side window glass 117a, front window glass 117b installed on the front side, and rear window glass 117c installed on the rear side. .

The exterior of the vehicle body further includes side mirrors 119 and the like providing the driver with a view of the rear of the vehicle 1.

The chassis of a vehicle further includes a power generating device, a power transmission device, a traveling device, a steering device, a braking device, a suspension device, a transmission device, a fuel device, front and rear wheels, and the like.

The vehicle further includes various safety devices for driver and occupant safety.

Vehicle stability devices include an airbag control device for the safety of passengers such as the driver in case of a vehicle collision, and an electronic stability control (ESC) that adjusts the vehicle's posture during vehicle acceleration or cornering. There are devices.

In addition, the vehicle 1 may further include a sensing device such as a proximity sensor for detecting a rear or side obstacle or another vehicle, and a rain sensor for detecting whether or not there is precipitation and the amount of precipitation.

Such a vehicle 1 is an electronic control unit (ECU) that controls driving of a power generating device, a power transmission device, a traveling device, a steering device, a braking device, a suspension device, a transmission device, a fuel device, various safety devices, and various sensors. Electronic Control Unit).

In addition, the vehicle 1 may optionally include electronic devices installed for driver's convenience, such as a hands-free device, a GPS, an audio device and a Bluetooth device, a rear camera, a terminal device charging device, and a high-pass device.

The vehicle 1 may further include a starting button for inputting an operation command to a starting motor (not shown).

That is, when the start button is turned on, the vehicle 1 operates a starter motor (not shown) and drives an engine (not shown) as a power generating device through the operation of the starter motor.

The vehicle 1 further includes a battery (not shown) electrically connected to terminal devices, audio devices, indoor lights, a starter motor, and other electronic devices to supply driving power.

The battery is charged using its own generator or engine power while driving.

In addition, the vehicle 1 further includes an antenna device 200 provided on the roof panel 113 to receive radio signals such as radio signals, broadcast signals, and satellite signals, and to transmit and receive signals to and from other vehicles, servers, and base stations. do. 1 shows that the antenna device 200 is provided on the roof panel 113, the location of the antenna device 200 is not limited thereto, and the front window glass 117b or the rear window glass of the vehicle 1 It is also possible to be provided in combination with a glass antenna on (117c).

This antenna device 200 will be described later.

As shown in FIG. 2, the interior 120 of the vehicle body is arranged on the seat 121 (121a, 121b) on which the occupant sits, the dashboard 122, and the dashboard, and includes a tachometer, a speedometer, a coolant temperature gauge, and a fuel gauge. , turn indicator lamp, high beam lamp, warning lamp, seat belt warning lamp, odometer, odometer, automatic shift selector indicator, door open warning lamp, engine oil warning lamp, fuel low warning lamp arranged on the instrument panel (i.e. cluster, 123) and a steering wheel 124 for manipulating the direction of the vehicle, and a center fascia 125 having a control panel for an audio device and an air conditioner.

The seat 121 includes a driver's seat 121a where the driver sits, a passenger seat 121b where the passenger sits, and a rear seat located at the rear of the vehicle.

Cluster 123 can be implemented digitally. This digital cluster displays vehicle information and driving information as images.

The center fascia 125 is located between the driver's seat 121a and the front passenger's seat 121b in the dashboard 122 and includes an audio device, an air conditioner, and a head unit 126 that controls seat heating.

Here, the head unit 126 may include a plurality of button units for receiving operation commands of the audio device, the air conditioning device, and the heating wire of the seat.

An air outlet, a cigar jack, and the like may be installed in the center fascia 125, and a multi-terminal 127 may be installed.

Here, the multi-terminal 127 may be disposed adjacent to the head unit 146, include a USB port and an AUX terminal, and may further include an SD slot.

The vehicle 1 may further include an input unit 128 for receiving operation commands for various functions, and may further include a display unit 129 for displaying information on functions being performed and information input by a user. .

The input unit 128 may be provided in at least one of the head unit 126 and the center fascia 125, and includes at least one physical device such as an on/off button for operating various functions and a button for changing set values of various functions. Include an in button.

The input unit 128 may transmit a button manipulation signal to an electronic control unit (ECU), a controller in the head unit 126, or the terminal 130.

The input unit 128 may include a touch panel integrally provided with the display unit of the terminal 130 . The input unit 128 may be activated and displayed in the form of a button on the display unit 130, and at this time, position information of the displayed button is input.

The input unit 128 may further include a jog dial (not shown) or a touch pad for inputting a cursor movement command and a selection command displayed on the display unit of the terminal 130 .

Here, the jog dial or touch pad may be provided on the center fascia 125 or the like.

In addition, the input unit 128 receives destination information when the navigation function is selected, transmits the input destination information to the terminal 130, receives channel and volume information when the DMB function is selected, and transmits the input channel and volume information to the terminal Send to (130).

In addition, the input unit 128 receives a frequency band (eg, FM band, etc.) and a frequency (eg, 89.1 MHz, etc.) from the user when the radio function is selected, and transmits the input frequency band and frequency information to the radio system 200; See Figure 3).

A terminal 130 that receives information from a user and outputs a result corresponding to the input information may be provided in the center fascia 125 .

The terminal 130 may perform at least one of a navigation function, a DMB function, a radio function, an audio function, and a video function, and display environment information and driving information of a road in an autonomous driving mode.

Such a terminal may be installed in a stationary manner on the dashboard.

The sound unit 131 outputs sound when a radio function or an audio function is performed. When the radio function is performed, the sound unit 131 may receive a sound signal corresponding to a frequency input from the user from an antenna device to be described later and output the sound signal to the user.

3 is a schematic diagram showing a control block diagram including a radio system and a GPS receiver (Global-Positioning System) as one of various electronic devices included in a vehicle according to an embodiment.

The radio system 200 or the GPS receiver 310 is only a part of various electronic devices included in the vehicle, and various electronic devices may be employed in the vehicle through the vehicle network NT.

At this time, the vehicle network (NT) is MOST (Media Oriented Systems Transport) with a communication speed of up to 24.5 Mbps (Mega-bits per second), FlexRay with a communication speed of up to 10 Mbps, and 125 kbps (kilo -bits per second) to 1 Mbps communication speed, CAN (Controller Area Network), 20 kbps communication speed, LIN (Local Interconnect Network), etc. can be adopted. Such a vehicle communication network NT can employ not only a single communication protocol such as Most, Plasley, Can, and Lin, but also a plurality of communication protocols.

Hereinafter, the configuration of the radio system 200 according to the present invention will be described. However, previously, as shown in FIG. 3, the GPS receiver 310 included in the vehicle is capable of acquiring vehicle location information, and GPS that calculates the location of the vehicle by performing communication with a plurality of satellites. (Global Positioning System) receiver.

Next, the radio system 200 includes an antenna device 240, an amplification unit 231, a tuner unit 232, and a control unit 233.

At this time, the antenna device 240 is composed of a plurality of antennas and may include at least one antenna. For example, in the case of including two antennas, the first antenna is an antenna operating in a first frequency band and receives a signal of the first frequency band as a signal of the basic frequency band. The first frequency band may be, for example, a DAB band. The signal of the DAB band may represent a signal of a frequency band of 174 MHz or more and 240 MHz or less. Also, the second antenna is an antenna operating in a second frequency band and receives a signal of the second frequency band as a signal of the basic frequency band. In particular, the second frequency band may be, for example, an FM band. The signal of the FM band may represent a signal of a frequency band of 88 MHz or more and 108 MHz or less.

Next, the radio system 200 may include an amplification unit 231, a tuner unit 232, and a control unit 233, and although not shown, a signal of a certain frequency band among signals received from the antenna 240 It may further include a filter for extracting only.

The amplifier 231 is a component that amplifies the signal received from the antenna 240 and may include an amplifier that amplifies a signal of a preset frequency band.

The control unit 233 controls a frequency band that can be received by the antenna unit 240 or controls an impedance variation range of the amplification unit 231 .

The control unit 233 of the antenna device 200 according to an embodiment controls a frequency band receivable by the antenna unit 240 (hereinafter, an operating frequency band) by adjusting an operating range of a coil included in the antenna unit 240. can do. For example, the longer the length of the coil, the lower the operating frequency band of the first antenna 240 or the second antenna 250 included in the antenna unit 240 is.

Accordingly, the controller 233 checks the number of channels within the receivable frequency band, and the tuner 232 can perform a scan operation.

In addition, the control unit 233 may receive control signals from various electronic devices included in various electronic devices in the vehicle.

For example, as shown in FIG. 3 , the location of the vehicle may be received from the GPS receiver 310, and the control unit 233 in the radio system 200 may acquire the received GPS information.

Accordingly, the controller 233 can change a channel within a frequency band that can be received effectively based on the received GPS information.

The tuner unit 232 tunes to the frequency selected by the user and extracts a signal of the selected frequency, and the tuner unit 232 converts the signal of the frequency selected by the user into a sound signal to the sound unit 131 of the vehicle 1 can be provided to In addition, the tuner can tune to a frequency selected via the input 128 of the vehicle 1 shown in FIG. 2 .

The signal extracted from the tuner unit 232 may be transmitted to the sound unit 131 of the vehicle 1, and the sound unit 131 may transmit the transmitted signal as sound.

Also, the tuner unit 232 according to an exemplary embodiment may include a first tuner 234 , a second tuner 235 , a third tuner 236 , and a fourth tuner 237 .

The tuner unit 232 may check radio signal strength. Also, after checking the signal strength, the tuner unit 232 scans all parameters to scan noise and the like.

At this time, parameters scanned by the tuner unit 232 mean all variables such as radio signal strength, radio signal noise, and radio signal effectiveness.

Therefore, the tuner unit 232 checks the signal strengths of all frequencies, scans all parameters for frequencies with high received field strength, and finally selects a station (by adjusting the antenna device 240 to select a broadcast station). .

As an example, FIG. 4 is a schematic diagram illustrating a scanning method of the radio system 200 according to an exemplary embodiment.

The tuner unit 204 may include four tuners 234 to 237, each tuner

4 to 7 are schematic diagrams illustrating a scanning method of a radio system according to an exemplary embodiment.

First, FIG. 4 is a schematic diagram illustrating a case in which one tuner scans all frequencies. For example, in the tuner unit 232 that operates only the first tuner 234 and the second tuner 235, the first tuner 234 tunes to a specific frequency, and when the radio system 200 operates, only the second The tuner 235 should scan the entire frequency (channels 1 to 208 as shown).

In contrast, as another example, in the tuner unit 232 in which the first tuner 234 to the fourth tuner 237 all operate, the first tuner 234 and the second tuner 235 transmit two frequencies. Even in a tuned state, all frequencies can be scanned using the remaining third tuner 236 and fourth tuner 237.

Specifically, FIG. 5 is a schematic diagram showing a case where two tuners scan all frequencies. The third tuner 236 may scan frequencies corresponding to half of all channels, and the fourth tuner 237 may scan frequencies corresponding to the other half.

For example, compared to the case where the tuner unit 232 checks the signal strength (SS) of all 208 channels using one tuner, two tuners divide the SS of all 208 channels in half, you can check

In addition, when the tuner unit 232 checks all parameters to check the reception strength of noise after checking the signal strength (SS), by scanning the reception rate using two tuners or four tuners, one Compared to when using a tuner, the scan speed can be improved by 2 or 4 times.

Also, the tuner unit 232 may allow two tuners to perform scanning or four tuners to perform scanning, so that the same time required for scanning by the four tuners is 2 during the same time required for scanning through the two tuners. A scan of the ship can be performed, which can improve scan accuracy.

In addition, the tuner unit 232 may check the signal strength (SS) with respect to a frequency table valid for the current vehicle location based on the GPS received by the control unit 233 through the vehicle network NT.

Also, the tuner unit 232 may use the first tuner 234 to the fourth tuner 237 as an additional check for signal strength (SS) reinforcement. For example, as the first tuner 234 checks the signal strength (SS) and the second tuner 235 scans the effective frequency obtained from the GPS, it is possible to scan the effective frequency twice. there is. That is, it can have an effect of increasing frequency scan effectiveness and accuracy during the required time for signal strength (SS) for all frequencies.

Also, after checking the signal strength (SS), the tuner unit 232 may check all parameters in order to check noise only at frequencies where the electric field strength is high.

In this case, all parameters for an effective frequency having a high field strength are checked with a specific tuner (first tuner), and all frequencies are checked using a tuner other than the specific tuner (second tuner).

At this time, during the time required for the second tuner to check the entire frequency, the first tuner continuously scans an effective frequency obtained when the second tuner scans among frequencies not included in the effective frequencies having a high electric field strength.

Also, at this time, the second tuner checks all parameters and then re-checks the frequencies that the first tuner has not scanned.

Specifically, FIG. 6 is a schematic diagram for explaining how the tuner unit 232 scans frequencies with high electric field strength, and FIG. 7 is a schematic diagram illustrating how the tuner unit 232 scans frequencies with high electric field strength using GPS information. It is a schematic diagram to explain how to scan.

First, as an example, as shown in FIG. 6, it is assumed that the third tuner 236 selects and uses the FM1 frequency band and the fourth tuner 237 selects and uses the FM2 frequency band. At this time, among the remaining two tuners, the first tuner 234 performs a check on a frequency having a high electric field strength, and the second tuner 235 checks all parameters (FP: Full Parameter) of all frequencies. Assume.

Thereafter, the first tuner 234 receives information about effective frequencies for all frequencies checked by the second tuner 235 . For example, as shown in FIG. 5 , it can be seen that the second tuner 235 has confirmed effective frequencies for channels 3, 4 through 8.

In particular, among all frequencies checked by the second tuner 235, the first tuner 234 checks frequencies that are not included in the check by the first tuner 234. That is, in the embodiment of FIG. 5 , channels 3 to 8 correspond to this.

In addition, after the second tuner 235 completes the overall frequency check, it checks the frequencies not searched by the first tuner 234 again among frequencies having high electric field strength and low noise reception sensitivity. That is, in the embodiment of FIG. 5 , channel 9 corresponds to this.

Next, FIG. 7 is a schematic diagram illustrating a method of frequency scanning by the tuner unit 232 according to another exemplary embodiment. That is, FIG. 7 is a schematic diagram for explaining a method in which the tuner unit 232 scans a frequency having a high electric field strength using GPS information.

First, as an example, it is assumed that the third tuner 236 selects and uses the FM1 frequency band and the fourth tuner 237 selects and uses the FM2 frequency band, as shown in FIG. 6 . At this time, among the remaining two tuners, the first tuner 234 has a high electric field strength and performs a check on the GPS effective frequency, and the second tuner 235 checks all parameters (FP: Full Parameter) of all frequencies. suppose to do

Parameter) is assumed to be checked.

Thereafter, the first tuner 234 receives information on effective frequencies for all frequencies checked by the second tuner 235 . For example, as shown in FIG. 5 , it can be seen that the second tuner 235 has confirmed effective frequencies for channels 3, 4 through 8.

In particular, among all frequencies checked by the second tuner 235, the first tuner 234 checks frequencies that are not included in the check by the first tuner 234. That is, in the embodiment of FIG. 5 , channels 3 to 8 correspond to this.

In addition, the second tuner 235 checks frequencies not included in the search result of the first tuner 234 from among effective frequencies upon check after completing the overall frequency check. That is, in the embodiment of FIG. 5 , channel 9 corresponds to this.

The disclosed embodiments may be implemented in the form of a recording medium storing instructions executable by a computer. Instructions may be stored in the form of program codes, and when executed by a processor, create program modules to perform operations of the disclosed embodiments. The recording medium may be implemented as a computer-readable recording medium.

Computer-readable recording media include all types of recording media in which instructions that can be decoded by a computer are stored. For example, there may be read only memory (ROM), random access memory (RAM), magnetic tape, magnetic disk, flash memory, optical data storage device, and the like.

As above, the disclosed embodiments have been described with reference to the accompanying drawings. Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in a form different from the disclosed embodiments without changing the technical spirit or essential characteristics of the present invention. The disclosed embodiments are illustrative and should not be construed as limiting.

Claims (18)

a tuner unit performing a receivable frequency scan; and
The tuner unit provides a frequency table for scanning, and when a first tuner included in the tuner unit scans the signal strength of a frequency in a first range among all frequencies, a second tuner selects the frequency in the first range A control unit for controlling to scan the signal strength of the remaining frequencies except for; includes,
The control unit,
After the signal strength scan in the tuner unit, the first tuner performs at least one parameter scan for a frequency having an electric field strength greater than a first threshold strength, and the second tuner scans the at least one parameter for all frequencies. A radio system that controls to perform According to claim 1,
A GPS receiving unit for obtaining GPS; further comprising,
The control unit controls at least one tuner included in the tuner unit to scan an effective frequency obtained from the GPS receiver. According to claim 2,
The control unit,
A radio system in which the second tuner detects an effective frequency obtained from the GPS receiver and additionally scans an effective frequency detected by the second tuner that is not included in the effective frequencies acquired during a full frequency scan by the first tuner . According to claim 3,
The effective frequency acquired by the first tuner during full frequency scanning is a frequency at which the electric field strength is greater than the first threshold strength and the noise is less than the second threshold value. delete According to claim 1,
The control unit,
so that the first tuner scans frequencies that are not included in frequencies greater than the first threshold intensity scanned by the first tuner among effective frequencies acquired by the second tuner through at least one parameter scan for all frequencies; radio system to control. a radio tuner unit that performs a receivable frequency scan; and
The tuner unit provides a frequency table for scanning, and when a first tuner included in the tuner unit scans the signal strength of a frequency in a first range among all frequencies, a second tuner selects the frequency in the first range A radio control unit for controlling to scan the signal strength of the remaining frequencies except for; includes,
The radio control unit,
After the signal strength scan by the radio tuner unit, the first tuner performs at least one parameter scan for a frequency having an electric field strength greater than a first threshold strength, and the second tuner scans the at least one parameter for all frequencies. A vehicle that you control to perform a scan. According to claim 7,
It further includes; a GPS receiving unit that obtains the GPS of the vehicle;
The radio control unit controls at least one tuner included in the tuner unit to scan an effective frequency obtained from the GPS receiver. According to claim 8,
The radio control unit,
The vehicle in which the second tuner detects an effective frequency obtained from the GPS receiver and additionally scans an effective frequency detected by the second tuner that is not included in the effective frequencies obtained when the first tuner performs a full frequency scan. According to claim 9,
The effective frequency obtained by the first tuner during full frequency scanning is a frequency at which electric field strength is greater than the first threshold strength and noise is less than the second threshold value. delete According to claim 7,
The radio control unit,
so that the first tuner scans frequencies that are not included in frequencies greater than the first threshold intensity scanned by the first tuner among effective frequencies acquired by the second tuner through at least one parameter scan for all frequencies; vehicle to control. performing a receivable frequency scan; and
Including; providing a frequency table for performing the receivable frequency scan;
When the first tuner scans the signal strength of a frequency in a first region among all frequencies, controlling the second tuner to scan the signal strength of frequencies other than the frequencies in the first region,
Scanning the signal strength; is,
After scanning the signal strength, the first tuner performs at least one parameter scan for frequencies where the electric field strength is greater than a first threshold strength, and the second tuner performs the at least one parameter scan for all frequencies. A control method of a radio system including; controlling to perform. According to claim 13,
acquiring GPS through a GPS receiver; and
Controlling at least one tuner to scan an effective frequency obtained from the GPS receiver; 15. The method of claim 14,
detecting, by the second tuner, an effective frequency obtained from the GPS receiver; and
and further scanning, by the first tuner, an effective frequency detected by the second tuner that is not included in the effective frequencies acquired during the full frequency scan. According to claim 15,
The effective frequency acquired by the first tuner during full frequency scanning is a frequency at which the electric field strength is greater than the first threshold strength and the noise is less than the second threshold value. delete According to claim 13,
so that the first tuner scans frequencies that are not included in frequencies greater than the first threshold intensity scanned by the first tuner among effective frequencies acquired by the second tuner through at least one parameter scan for all frequencies; A control method of a radio system further comprising; controlling.

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