WO2014024278A1

WO2014024278A1 - Broadcast receiving apparatus

Info

Publication number: WO2014024278A1
Application number: PCT/JP2012/070234
Authority: WO
Inventors: 勇人奥田
Original assignee: 三菱電機株式会社
Priority date: 2012-08-08
Filing date: 2012-08-08
Publication date: 2014-02-13
Also published as: JPWO2014024278A1

Abstract

This broadcast receiving apparatus is provided with: internal memory (13) which stores the position of a wireless station, and the frequency of radio waves transmitted from the wireless station; an adaptive filter section (4) which filters high frequency signals of received broadcast waves; a disturbing wave presence/absence determining section (15) which determines, at the time of receiving desired broadcast waves, whether disturbing waves are to be generated due to the radio waves transmitted from the wireless station, on the basis of the positional information of a mobile body, and the position of the wireless station, said position having been stored in the internal memory (13); and a filter path selecting section (16) which, in the cases where it is determined by the disturbing wave presence/absence determining section (15) that the disturbing waves are to be generated, selects a passing frequency band of the adaptive filter section (4) such that the desired broadcast waves are passed, and the frequency of the disturbing waves is out of the passing frequency band.

Description

Broadcast receiver

The present invention relates to a broadcast receiving apparatus mounted on a moving body such as a vehicle.

For example, Patent Document 1 discloses a vehicle receiver that converts a received high-frequency signal into an intermediate-frequency signal, and then passes it through one of filters having different pass bands, and detects the subsequent signal. . In this receiver, the location where the adjacent interference wave and the intermodulation interference wave are generated and the frequency information are stored in association with each other, and the intermediate frequency is determined based on the frequency information of the interference wave determined from the stored contents according to the traveling location of the vehicle. The filter that passes the signal is switched.

JP 2007-288529 A

In the conventional technique represented by Patent Document 1, an unexpected noise component is generated when a high-frequency signal is converted to an intermediate frequency and cannot be completely removed by a subsequent filter, and reception quality and voice quality may deteriorate. There was a problem that there was.

The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a broadcast receiving apparatus that can appropriately remove external noise.

A broadcast receiving apparatus according to the present invention is a broadcast receiving apparatus that is mounted on or carried by a mobile body and receives broadcast waves, and a storage unit that stores a position of a radio station and a frequency of a radio wave transmitted from the radio station, When receiving a desired broadcast wave based on the adaptive filter section that filters the received broadcast wave high-frequency signal, and the position information of the mobile unit and the position of the radio station stored in the storage section, transmitted from the radio station A determination unit that determines whether or not an interference wave due to the generated radio wave is generated, and when the determination unit determines that the interference wave is generated, a desired broadcast wave passes and the frequency of the interference wave is a pass frequency band And a selection unit that selects a pass frequency band of the adaptive filter unit that is outside.

According to the present invention, there is an effect that external noise can be appropriately removed.

It is a figure explaining the external noise which cannot be removed with an intermediate frequency filter. It is a block diagram which shows the structure of the broadcast receiver which concerns on this invention. 1 is a diagram illustrating a main configuration of a broadcast receiving device according to Embodiment 1. FIG. 3 is a flowchart showing an operation of the broadcast receiving apparatus according to the first embodiment. 6 is a diagram illustrating a method for removing external noise in the first embodiment. FIG. It is a figure which shows the main structures of the broadcast receiver which concerns on Embodiment 2 of this invention. 6 is a flowchart showing an operation of the broadcast receiving apparatus according to the second embodiment. 10 is a diagram illustrating a method for removing external noise according to Embodiment 2. FIG.

Hereinafter, in order to describe the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a diagram illustrating external noise that cannot be removed by the intermediate frequency filter. FIG. 1A shows the configuration of a reception system in a conventional broadcast receiving apparatus, and FIG. 1B schematically shows the influence of external noise during frequency conversion.
As shown in FIG. 1A, the received broadcast wave high-frequency signal is amplified by a high-frequency amplifier circuit after only a predetermined band component is extracted by a high-frequency filter, and is input to a frequency conversion circuit. The mixer of the frequency conversion circuit mixes the oscillation signal generated by the local oscillator with the output from the high frequency amplifier circuit and converts the output to an intermediate frequency. From the intermediate frequency signal output from the frequency conversion circuit, only a desired band component is extracted by the intermediate frequency filter, and then amplified and output by the intermediate frequency amplification circuit. The intermediate frequency signal is further frequency-converted to a baseband frequency later (superheterodyne method).

Conventionally, as shown in FIG. 1B, when there is external noise in the pass frequency band of the high frequency filter, the noise component remains in the frequency band that cannot be removed by the intermediate frequency filter after frequency conversion (intermediate frequency). The noise in the pass frequency band of the filter) and the reception quality may be degraded. In addition, noise components generated at the time of frequency conversion may affect the amplification processing in the intermediate frequency amplifier circuit, and noise components may remain in the baseband frequency band, thereby degrading voice quality.

The present invention removes a noise component from the front end, that is, the high-frequency signal before frequency conversion, in order to appropriately remove the unexpected noise component generated when frequency-converting the high-frequency signal as described above. Hereinafter, a specific configuration will be described.
FIG. 2 is a block diagram showing the configuration of the broadcast receiving apparatus according to the present invention. The broadcast receiving apparatus shown in FIG. 2 is a broadcast receiving apparatus that receives a radio broadcast wave (FM modulated wave) mounted on a moving body such as a vehicle or carried by a moving body such as a human being. Connect to the terminal 14 to obtain predetermined information.
Further, the configuration includes an antenna 1, an antenna input circuit 2, a high frequency filter 3a, a high frequency amplifier circuit 3, an adaptive filter unit 4, a frequency conversion circuit 5, an intermediate frequency filter 6a, an intermediate frequency amplifier circuit 6, a detection circuit 7, and stereo demodulation. A circuit 8, a de-emphasis circuit 9, a low frequency amplifier circuit 10, a speaker 11, a selection circuit 12 and an internal memory 13 are provided.

The antenna input circuit 2 outputs the high frequency signal of the broadcast wave received by the antenna 1 to the high frequency filter 3a. The high frequency filter 3 a extracts only a predetermined band component from the input high frequency signal and amplifies it by the high frequency amplifier circuit 3.
The adaptive filter unit 4 is provided in the previous stage of the frequency conversion circuit 5 and allows a high-frequency signal in a desired pass frequency band with reduced external noise to pass from the output of the high-frequency amplifier circuit 3.

The frequency conversion circuit 5 receives the high frequency signal filtered by the adaptive filter unit 4 and converts the frequency to an intermediate frequency. From the intermediate frequency signal, only a predetermined band component is extracted by the intermediate frequency filter 6 a and input to the intermediate frequency amplifier circuit 6.
The intermediate frequency signal amplified to a level that can be detected by the intermediate frequency amplifier circuit 6 is detected by a detection circuit 7 from a desired broadcast station and demodulated by a stereo demodulation circuit 8.
When the received wave is FM broadcast, the de-emphasis circuit 9 restores the emphasized high-frequency band signal level of the received wave. The output of the de-emphasis circuit 9 is amplified by the low frequency amplifier circuit 10 and output from the speaker 11 as audio.

When the selection circuit 12 receives a desired broadcast wave based on the position information of the mobile body and the position of the wireless station stored in the internal memory 13, whether the interference wave due to the radio wave transmitted from the wireless station is generated. If it is determined whether or not an interference wave is generated, a pass frequency band of the adaptive filter unit 4 that passes a desired broadcast wave and the frequency of the interference wave is outside the pass frequency band is selected.
The internal memory 13 is a storage unit that stores the position of the wireless station and the frequency of the radio wave transmitted from the wireless station. The position of the radio station and the frequency of the radio wave transmitted from the radio station are used to determine whether or not an interference wave due to the radio wave transmitted from the radio station is generated when a desired broadcast wave is received. The The internal memory 13 may also store transmission power from the wireless station.

The portable terminal 14 is a portable terminal that has a position of a wireless station, a function of acquiring a frequency of a radio wave transmitted from the wireless station, and a function of measuring its own position. For example, the function of measuring its own position can be realized by a GPS (Global Positioning System) receiver. That is, the latitude / longitude obtained by analyzing the GPS signal is used.
In addition, it may replace with a GPS receiver and may perform position measurement using a gyroscope, a distance sensor, etc.
As a function of acquiring information (interference wave information) related to a radio station, for example, information indicating the position of the radio station that generates a transmission wave that can become an interference wave and frequency information of the transmission wave are obtained by communication means such as broadcasting or telephone. get. With this function, a television tower (a radio tower) that transmits a television broadcast wave that can be an interference wave is identified as a wireless station, and the position and frequency information of the television broadcast wave are acquired.

Moreover, the portable terminal 14 is realizable with the existing communication terminals, such as a mobile telephone, a smart phone, and a portable information terminal. Even if the broadcast receiving apparatus according to the present invention does not have the function of the mobile terminal 14, the broadcast receiving apparatus can acquire the information only by communication connection with the mobile terminal 14. In addition, it is possible to remove interference waves more accurately by providing versatility to obtain detailed information by connecting to various portable terminals 14.
FIG. 2 shows the case where the position of the wireless station, the frequency of the radio wave transmitted from the wireless station, and the position information of the moving body are acquired from the mobile terminal 14. You may provide the communication part which has a position, the function to acquire the frequency of the electromagnetic wave transmitted from this radio station, and the function to measure own position.

FIG. 3 is a diagram showing the main configuration of the broadcast receiving apparatus according to Embodiment 1, and shows the configuration of the adaptive filter unit 4 and the selection circuit 12 in the front end.
As shown in FIG. 3, the selection circuit 12 includes an interference wave presence / absence determination unit 15 and a filter path selection unit 16, and the adaptive filter unit 4 includes bandpass filters 17 to 19 and an RF switch 20. In the first embodiment, the adaptive filter unit 4 includes bandpass filters 17 to 19 having different pass frequency bands, and the selection circuit 12 selects a desired broadcast wave from the bandpass filters 17 to 19. A band-pass filter that passes and whose interference wave frequency is outside the pass frequency band is selected.

The interference wave presence / absence determination unit 15 is a determination unit that determines presence / absence of an interference wave in receiving a desired broadcast wave. For example, when a desired broadcast wave is received by searching for the position of the wireless station stored in the internal memory 13 using the current vehicle position information acquired from the mobile terminal 14, the wireless station It is determined whether or not an interference wave due to the transmitted radio wave is generated. When it is determined that the interference wave is generated, the frequency of the interference wave is determined from the frequency of the radio wave transmitted from the wireless station.
Further, the filter path selection unit 16 selects a desired broadcast wave from the bandpass filters 17 to 19 based on the desired broadcast wave frequency and the interference wave frequency determined by the interference wave presence / absence determination unit 15. It is a selection unit that selects a bandpass filter that passes and the frequency of the interference wave is outside the pass frequency band.

The bandpass filters 17 to 19 are analog filters that have different pass frequency bands and pass signals in the pass frequency band from high-frequency analog signals.
In the example of FIG. 3, the configuration including the three band-pass filters 17 to 19 is shown, but four or more filters having different pass frequency bands may be provided.
The RF switch 20 is a switch unit that switches a filter connected to the output path from the bandpass filters 17 to 19.
The filtered high frequency analog signal output from the RF switch 20 is input to the frequency conversion circuit 5 shown in FIG.

Next, the operation will be described.
FIG. 4 is a flowchart showing the operation of the broadcast receiving apparatus according to the first embodiment, and shows details of processing for determining the presence / absence of an interfering wave in a received wave and selecting a filter path through which the received wave passes in the front end.
First, the mobile terminal 14 provides interference wave information by connecting to the broadcast receiving apparatus according to Embodiment 1 by wire or wireless. The interference wave information is information indicating the position of the radio station and the frequency of the radio wave transmitted from the radio station.
When the broadcast receiving apparatus according to Embodiment 1 acquires the interference wave information from the mobile terminal 14, it stores it in the internal memory 13 (step ST1).
Next, the selection circuit 12 of the broadcast receiving apparatus according to Embodiment 1 acquires current position information from the mobile terminal 14 (step ST2).

When the interference wave presence / absence determination unit 15 of the selection circuit 12 receives a desired broadcast wave using the current position information acquired from the mobile terminal 14 and the position of the wireless station stored in the internal memory 13, It is determined whether or not there is an interference wave due to the radio wave (step ST3).
Here, for example, the interference wave presence / absence determination unit 15 is configured to transmit radio waves from all wireless stations that can be received at the current position based on the current position of the mobile body and the position of the wireless station stored in the internal memory 13. Determine the frequency. Specifically, from the current position of the mobile unit and the position of the radio station, whether the distance from the mobile unit to the radio station is calculated, and can be received by assuming a predetermined transmission power and comparing with a threshold of distance Determine whether or not. By this determination, the frequency of receivable radio waves is determined by performing for all wireless stations within a predetermined range centering on the moving body.
The frequency of the interference wave is determined based on the frequency of the radio wave from the receivable radio station. For example, out of all the frequencies of radio waves that can be received at the current position, a frequency excluding a desired broadcast wave frequency in the pass frequency band of the high frequency filter 3a is set as an interference wave.

If there is no interference wave due to the reception of the desired broadcast wave (step ST3; NO), the interference wave presence / absence determination unit 15 notifies the filter path selection unit 16 to that effect. Upon receiving the notification from the interference wave presence / absence determination unit 15, the filter path selection unit 16 selects a default bandpass filter 17 from the bandpass filters 17 to 19, and the RF switch 20 of the adaptive filter unit 4. Is specified.

On the other hand, when there is an interference wave due to reception of the desired broadcast wave (step ST3; YES), the interference wave presence / absence determination unit 15 determines that there is an interference wave, the frequency of the desired broadcast wave (desired wave), and The filter path selection unit 16 is notified of the frequency of the interference wave.
Upon receiving the notification from the interference wave presence / absence determination unit 15, the filter path selection unit 16 selects the bandpass filter 18 or the bandpass filter 19 that passes the desired wave and the frequency of the interference wave is outside the pass frequency band. Thus, the RF switch 20 of the adaptive filter unit 4 is designated.

The high-frequency signal that is the received wave is filtered through the band-pass filters 17 to 19 (step ST5).
The RF switch 20 switches the bandpass filter designated by the filter path selection unit 16 from the bandpass filters 17 to 19 that have filtered the high-frequency signal, to the filter that connects the output path (step ST6).
In this way, the RF switch 20 dynamically passes the desired wave (FM modulated wave) as shown in FIG. 5 and dynamically changes the filter path to a bandpass filter in which the frequency of the interference wave (external noise) is outside the pass frequency band. By switching, a high-frequency signal with reduced external noise can be extracted even if the frequency is converted to an intermediate frequency.

As described above, according to the first embodiment, the position of the radio station, the internal memory 13 for storing the frequency of the radio wave transmitted from the radio station, and the adaptation for filtering the high frequency signal of the received broadcast wave Based on the filter unit 4 and the position information of the mobile unit and the position of the radio station stored in the internal memory 13, when receiving a desired broadcast wave, is an interference wave generated by the radio wave transmitted from the radio station generated? When the interference wave presence / absence determination unit 15 that determines whether or not the interference wave presence / absence determination unit 15 determines that an interference wave is generated, a desired broadcast wave passes and the frequency of the interference wave is outside the pass frequency band. The filter path selection unit 16 that selects the pass frequency band of the adaptive filter unit 4 is provided. By comprising in this way, the external noise superimposed on a high frequency signal can be removed appropriately. Since the processing is performed at the front end, the influence on the existing circuit is small, the circuit configuration can be simplified, and the cost can be reduced.

Further, according to the first embodiment, the adaptive filter unit 4 includes the plurality of bandpass filters 17 to 19 having different pass frequency bands, and the filter path selection unit 16 includes the plurality of bandpass filters 17. A band-pass filter that passes a desired broadcast wave and whose interference wave frequency is outside the pass frequency band is selected from ˜19.
Thus, the broadcast receiving apparatus according to the first embodiment can be realized only by adding a simple circuit between the high-frequency amplifier circuit and the frequency conversion circuit. That is, since the external noise superimposed on the high-frequency signal is removed by the analog filter at the front end, the circuit configuration can be simplified with little influence on the existing circuit, and the cost can be reduced. In addition, since the band pass filter suitable for the travel location and area of the vehicle is sequentially selected, it is possible to provide a broadcast receiving apparatus that ensures wide area.

Furthermore, according to this Embodiment 1, it connects to the portable terminal 14 which has the function of acquiring the position of a radio station, the function of acquiring the frequency of the radio wave transmitted from this radio station, and its own position, Since the position of the radio station and the frequency and position information of the radio wave transmitted from the radio station are acquired, the broadcast receiving apparatus according to the first embodiment is connected to the mobile terminal 14 even if it does not have the above function. Only the above information can be acquired.

Embodiment 2. FIG.
FIG. 6 is a diagram showing a main configuration of a broadcast receiving apparatus according to Embodiment 2 of the present invention. The broadcast receiving apparatus shown in FIG. 6 is mounted on a moving body such as a vehicle or carried by a moving body such as a human and receives radio broadcast waves (FM modulated waves), as in the first embodiment. The broadcast receiving apparatus has an adaptive filter unit 4A and a selection circuit 12A at the front end.
As illustrated in FIG. 6, the selection circuit 12 </ b> A includes an interference wave presence / absence determination unit 21 and a filter parameter selection unit 22, and the adaptive filter unit 4 </ b> A includes an A / D conversion unit 23 and a bandpass filter 24. In the second embodiment, the adaptive filter unit 4A has a band-pass filter 24 whose pass frequency band is variable according to the filter parameter, the selection circuit 12A passes a desired broadcast wave, and the frequency of the interference wave is A filter parameter outside the pass frequency band is selected and installed in the band pass filter 24.

The interference wave presence / absence determination unit 21 is a determination unit that determines the presence or absence of an interference wave in receiving a desired broadcast wave, as in the first embodiment. For example, when a desired broadcast wave is received by searching for the position of the wireless station stored in the internal memory 13 using the current vehicle position information acquired from the mobile terminal 14, the wireless station It is determined whether or not an interference wave due to the transmitted radio wave is generated. If it is determined that the interference wave is generated, the frequency of the interference wave is determined from the frequency of the radio wave transmitted from the radio station.

Further, the filter parameter selection unit 22 passes the desired broadcast wave based on the desired broadcast wave frequency and the interference wave frequency determined by the interference wave presence / absence determination unit 21, and the interference wave frequency passes. A selection unit that selects a filter parameter that is outside the frequency band and sets the filter parameter in the bandpass filter 24. The filter parameter is, for example, an adaptive filter coefficient that determines a pass frequency band.

The A / D conversion unit 23 is an analog-digital conversion unit that converts a high-frequency signal of a received broadcast wave from an analog signal to a digital signal.
The band-pass filter 24 is a digital filter that has a variable pass frequency band according to the filter parameter and passes a signal in the pass frequency band from the digital signal converted by the A / D converter 23. For example, it is realized by a notch filter that attenuates a component of a specific frequency band from an input signal.
The filtered high-frequency digital signal output from the bandpass filter 24 is input to the frequency conversion circuit 5 shown in FIG.

Next, the operation will be described.
FIG. 7 is a flowchart showing the operation of the broadcast receiving apparatus according to the second embodiment, and shows details of processing for determining whether there is an interference wave in the received wave and selecting a filter path through which the received wave passes in the front end.
First, similarly to the first embodiment, the mobile terminal 14 provides interference wave information by connecting to the broadcast receiving apparatus according to the second embodiment by wire or wireless. The interference wave information is information indicating the position of the radio station and the frequency of the radio wave transmitted from the radio station.
The broadcast receiving apparatus according to Embodiment 2 stores the interference wave information from the mobile terminal 14 in the internal memory 13 (step ST1a).
Next, the selection circuit 12A of the broadcast receiving apparatus according to Embodiment 2 acquires current position information from the mobile terminal 14 (step ST2a).

When the interference wave presence / absence determining unit 21 of the selection circuit 12A receives a desired broadcast wave using the current position information acquired from the mobile terminal 14 and the position of the wireless station stored in the internal memory 13, the signal from the wireless station is received. It is determined whether there is an interference wave due to the radio wave (step ST3a). Up to this point, the processing is the same as that described with reference to FIG. 4 in the first embodiment.

When the desired broadcast wave is received and there is no interfering wave (step ST3a; NO), the interfering wave presence / absence determining unit 21 notifies the filter parameter selecting unit 22 to that effect. Upon receiving the notification from the interference wave presence / absence determination unit 21, the filter parameter selection unit 22 selects a default filter parameter and sets it in the bandpass filter 24 of the adaptive filter unit 4A.
The default filter parameter is a parameter that allows the entire frequency band not subjected to the filtering process to pass.

On the other hand, when there is an interference wave due to reception of a desired broadcast wave (step ST3a; YES), the interference wave presence / absence determination unit 21 indicates that there is an interference wave, the frequency of the desired broadcast wave (desired wave), and the determined interference. The frequency of the wave is notified to the filter parameter selection unit 22.
When the filter parameter selection unit 22 receives the notification from the interference wave presence / absence determination unit 21, the filter parameter selection unit 22 selects a filter parameter that passes the desired wave and the frequency of the interference wave is outside the pass frequency band and sets the filter parameter in the bandpass filter 24. (Step ST4a).

The high-frequency signal, which is a received wave, is converted into a digital signal by the A / D converter 23, and then filtered by the bandpass filter 24 (step ST5a).
In this manner, as shown in FIG. 8, the filter parameter selection unit 22 selects a filter parameter that passes the desired wave (FM modulated wave) and the frequency of the interference wave (external noise) is outside the pass frequency band. By setting the bandpass filter 24 such as a notch filter, a high-frequency signal with reduced external noise can be extracted even if the frequency is converted to an intermediate frequency.

As described above, according to the second embodiment, the adaptive filter unit 4A has the A / D conversion unit 23 that converts the high frequency signal of the received broadcast wave into a digital signal, and the pass frequency band is variable depending on the filter parameter. A band-pass filter 24 that passes a signal in a pass frequency band from the digital signal converted by the A / D converter 23, and the filter parameter selector 22 passes a desired broadcast wave and interferes with it. A filter parameter whose wave frequency is outside the pass frequency band is selected and set in the bandpass filter 24.
Even with this configuration, it is possible to appropriately remove the external noise superimposed on the high-frequency signal at the front end.
Furthermore, since the processing is performed at the front end, the circuit configuration can be simplified and the cost can be reduced with little influence on existing circuits.
In addition, since various pass frequency bands can be realized by changing the filter parameters, the circuit scale can be reduced and the overall apparatus can be reduced in size.
Further, since the filter parameters are sequentially updated to be suitable for the travel location and area of the vehicle, it is possible to provide a broadcast receiving apparatus that ensures a wide area.

In the first and second embodiments, the case where the broadcast receiving apparatus according to the present invention receives a radio broadcast is taken as an example. However, the present invention can also be applied as it is when receiving a television broadcast.

In the present invention, within the scope of the invention, any combination of each embodiment, any component of each embodiment can be modified, or any component can be omitted in each embodiment. .

Since the broadcast receiving apparatus according to the present invention can appropriately remove external noise, it is suitable for a vehicle-mounted broadcast receiving apparatus in which the reception environment changes due to movement of the vehicle.

1 antenna, 2 antenna input circuit, 3a high frequency filter, 3 high frequency amplification circuit, 4, 4A adaptive filter section, 5 frequency conversion circuit, 6a intermediate frequency filter, 6 intermediate frequency amplification circuit, 7 detection circuit, 8 stereo demodulation circuit, 9 De-emphasis circuit, 10 Low frequency amplifier circuit, 11 Speaker, 12, 12A selection circuit, 13 Internal memory, 14 Mobile terminal, 15, 21 Interference wave presence / absence determination unit, 16 Filter path selection unit, 17-19, 24 Band pass filter , 20 RF switch, 22 filter parameter selection unit, 23 A / D conversion unit.

Claims

In a broadcast receiving device that is mounted or carried on a mobile body and receives broadcast waves,
A storage unit for storing the position of the radio station and the frequency of the radio wave transmitted from the radio station;
An adaptive filter unit that filters high-frequency signals of received broadcast waves;
Whether or not an interference wave due to a radio wave transmitted from the radio station is generated when receiving a desired broadcast wave based on the position information of the mobile body and the position of the radio station stored in the storage unit A determination unit for determining
A selection unit that selects a pass frequency band of the adaptive filter unit that passes the desired broadcast wave and has a frequency outside the pass frequency band when the determination unit determines that an interference wave is generated. A broadcast receiving apparatus comprising:
The adaptive filter unit has a plurality of analog filters having different pass frequency bands from each other,
The broadcast according to claim 1, wherein the selection unit selects an analog filter that passes a desired broadcast wave and has a frequency of an interference wave outside the pass frequency band from the plurality of analog filters. Receiver device.
The adaptive filter unit includes: an A / D converter that converts a received broadcast wave high-frequency signal into a digital signal; and a digital signal that has a variable pass frequency band according to a filter parameter and is converted by the A / D converter. A digital filter that passes the signal of the pass frequency band from
2. The broadcast receiving apparatus according to claim 1, wherein the selection unit selects a filter parameter that allows a desired broadcast wave to pass and the frequency of the interference wave is outside the pass frequency band, and sets the filter parameter in the digital filter. .
Connect to a mobile terminal that has the function of acquiring the position of the radio station, the frequency of the radio wave transmitted from the radio station, and the function of measuring its own position, and transmitting the position of the radio station and the radio station. The broadcast receiving apparatus according to claim 1, wherein a frequency of a radio wave to be transmitted and the position information are acquired.