JPH11191743A - Reception frequency selection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the sensitivity for a radio wave received by a receiver. SOLUTION: The receiver is a reception frequency selection system that selects a frequency received by a receiver 6 onboard a vehicle as for radio signals with different frequencies sent from pluralities of transmission stations of broadcast stations A-C. The reception frequency selection system is provided with a storage means 1 that stores broadcast station information 1a including frequency information and position information of each of pluralities of transmission stations A1-A3, B1-B3, C1, C2 of the broadcast stations A-C, a position means 2 that measures the position information of the vehicle, and a selection means 3 that obtains the frequency of the transmission stations A1-A3, B1-B3, C1, C2 at which the radio signal is received with the best sensitivity based on the relation between the position information of pluralities of the transmission stations A1-A3, B1-B3, C1, C2 included in broadcast station information 1a and the position information of the vehicle measured by the position means 2 and that selects the obtained frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving frequency selecting device provided in a mobile receiving device for automatically selecting a frequency of a radio wave received by the receiving device.

[0002]

2. Description of the Related Art Generally, a broadcasting station has a plurality of radio wave transmitting stations, and each radio wave transmitting station provides the same program at a different frequency. FIG. 8 shows radio wave transmitting stations A1 to A3 for transmitting the broadcast of the broadcasting station A.
A3 broadcast the same program at different frequencies a1 to a3, respectively.

For this reason, for example, when a receiver at a certain point P1 moves to a point P2, initially, that is, when the receiver is at the point P1, the receiver has received the radio wave of the frequency a1 from the radio wave transmitting station A1, but at the point P2 When moving, the radio wave from the radio wave transmitting station A1 is weakened and the receiving sensitivity is lowered. Therefore, in order to receive the same program, it is necessary to make adjustments to receive the same program with the radio wave of the frequency a2 from the radio wave transmitting station A2. This adjustment is realized manually such as tuning with a dial.

[0004] Some receiving apparatuses have a plurality of buttons, and different frequencies can be set for each button. However, the number of buttons is limited, and a plurality of radio wave transmissions possessed by the same broadcasting station are limited. Assigning a button for each frequency is not a practical solution.

[0005]

As described above, even in the case of a program from the same broadcasting station, each radio wave transmitting station transmits at a different frequency. Every time the frequency decreases, it must be adjusted to a frequency with good reception sensitivity.

[0006] Further, for example, the moving body is an automobile or the like, and it is not preferable that the driver adjusts the frequency by tuning operation during driving. Further, even if the receiving apparatus has a plurality of buttons, the above-described problem is included.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and provides a receiving frequency selecting apparatus for automatically selecting a frequency for receiving a broadcast with optimum sensitivity in a mobile receiving apparatus. Aim.

[0008]

According to a first aspect of the present invention, there is provided an apparatus for transmitting one of radio waves transmitted at different frequencies from a plurality of transmitting stations of a broadcasting station. A receiving frequency selecting device for selecting a frequency of a radio wave to be received by a receiving device of a receiving mobile body, a storage unit for storing broadcast station information including position information and frequency information for each of a plurality of transmitting stations of a broadcast station, The position measuring means for measuring the position information of the moving object, the position information of each of a plurality of transmitting stations included in the broadcast station information, and the relationship between the position information of the moving object measured by the position measuring means, A receiving frequency selecting apparatus comprising: a frequency of a transmitting station capable of receiving radio waves with high sensitivity; and a selecting means for selecting the frequency.

Therefore, in the receiving frequency selecting apparatus according to the first aspect of the present invention, the frequency of the transmitting station capable of receiving the radio wave with the highest sensitivity is obtained from the positional information of the moving object and the positional information of the transmitting station. Since the frequency is selected, it is possible to prevent the reception sensitivity from being lowered due to the movement.

Further, since the frequency is automatically selected, readjustment by manual operation or the like is not necessary. Next, a second aspect of the present invention provides a mobile receiving apparatus for receiving any one of radio waves transmitted at different frequencies from at least one transmitting station of each of a plurality of broadcasting stations. A receiving frequency selecting apparatus for selecting a frequency of a radio wave to be transmitted, wherein a receiver designates any one of a plurality of broadcast stations, and a broadcast station designating means for at least one transmitting station for each of the plurality of broadcast stations. Storage means for storing broadcast station information including position information and frequency information; position measurement means for measuring position information of a mobile object; and broadcasts designated by the broadcast station designation means among the broadcast stations stored in the storage means Based on the relationship between the position information of each transmitting station of the station and the position information of the mobile object measured by the position measuring means, the radio wave can be received with the highest sensitivity among the frequencies of the transmitting stations of the designated broadcasting station. Determined frequency, a reception frequency selective device including a selecting means for selecting the determined frequency.

Therefore, in the receiving frequency selecting apparatus according to the second aspect of the present invention, instead of specifying the frequency of the radio wave to be received by the receiver, the receiving station is specified by the broadcasting station specifying means. Among the frequencies of the transmitting stations of the broadcasting stations, a frequency at which radio waves can be received with the highest sensitivity is obtained, and this frequency is selected. Therefore, it is possible to prevent a decrease in the receiving sensitivity due to movement.

Also, the receiver only needs to specify the broadcasting station, and does not need to be conscious of selecting or changing the radio transmitting station of the broadcasting station and its frequency. can do.

Further, in order to automatically select a frequency,
No need for manual readjustment. Finally, a third aspect of the present invention provides a mobile receiving apparatus for receiving any one of radio waves transmitted at different frequencies from at least one transmitting station of each of a plurality of broadcasting stations. A receiving frequency selecting apparatus for selecting a frequency of a radio wave to be transmitted, in which a receiver designates any one of a plurality of broadcast stations, and a plurality of broadcast stations are divided into a plurality of regions. A plurality of storage means for storing broadcast station information including position information and frequency information of at least one transmitting station for each broadcast station belonging to each region in,
Position measurement means for measuring position information of the moving object, storage means selection means for selecting storage means corresponding to the position information measured by the position measurement means, and storage means selected by the storage means selection means From the relationship between the position information of each transmitting station of the broadcasting station designated by the broadcasting station designating means of the broadcasting stations and the position information of the moving object measured by the position measuring means, the transmitting stations of the designated broadcasting station are determined. And a selecting means for selecting a frequency capable of receiving a radio wave with the highest sensitivity among the above frequencies and selecting the determined frequency.

Therefore, in the receiving frequency selecting apparatus according to the third aspect of the present invention, a plurality of broadcasting stations are divided into a plurality of regions, and a broadcasting station belonging to each region is selected based on the position information of the mobile unit. Therefore, it is possible to receive a radio wave of a broadcasting station suitable for an area.

[0015] Further, even if the broadcasting station is changed due to the change of the area, the frequency at which the radio wave can be received with the highest sensitivity among the frequencies of the transmitting stations of the broadcasting station designated by the broadcasting station designating means is determined, and this frequency is selected. Therefore, it is possible to prevent a decrease in reception sensitivity due to movement. Further, since the frequency is automatically selected, readjustment by manual operation or the like is not required.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. (First Embodiment) FIG. 1 is a block diagram showing an example of a receiving apparatus provided with a receiving frequency selecting apparatus according to the present embodiment.

The storage device 1 stores a broadcast station information table 1a including position information of radio wave transmitting stations A1 to A3, B1 to B3, and C1 to C2 of a plurality of broadcast stations A to C, frequencies, and the like. .

The position measuring device 2 is, for example, a GPS (global)
It is a device such as a positioning system, and measures position information such as the latitude and longitude of the moving body and outputs the result to the selection unit 3.

The selecting section 3 stores the position information of the moving object measured by the position measuring device 2 and the radio wave transmitting stations A1 to A3, B1 to B3, C in the broadcast station information table 1a of the storage device 1.
The relationship with the position information 1 to C2 is compared and evaluated, and the receiving frequency is automatically and dynamically changed by, for example, selecting a radio wave transmitting station having the shortest distance to the mobile unit in the same broadcasting station. An instruction to that effect is output to the receiver 4.

That is, the selector 3 considers that, for example, if the same broadcast station receives a radio wave at the frequency of a radio wave transmitting station closest to the mobile unit, the radio wave can be received with the best sensitivity.

In this case, when the evaluation values of two radio transmitting stations of the same broadcasting station are close to each other, radio waves are actually received by the frequencies of the two radio transmitting stations whose evaluation values are close to each other. Then, an instruction to compare the receiving sensitivities and select the one with the better result is output to the receiver 4.

The operation panel 5 is a device for operating the receiving device 6, and includes channel selection buttons 5a to 5c for selecting each of the broadcasting stations A to C, and power ON / OFF of the receiving device 6 (not shown). Switches and the like are provided. Further, the operation panel 5 performs a display for operating the receiving device 6 manually or the like, a display of a state of the receiving device 6, and the like.

The receiver 4 is a device such as a television and a radio, for example, and receives a radio wave in accordance with an instruction input from the selection unit 3. FIG. 2 is a conceptual diagram illustrating an example of radio wave reception in the mobile receiving device 6 including the receiving frequency selecting device according to the present embodiment, and exemplifies the case of the broadcasting station A.

Broadcasting station A has three radio transmitting stations A1 to A3.
And the respective radio wave transmitting stations A1, A2,
A3 is located _{(A1 x, A1 y),} (A2 x, A2 y),
(A3 _x , A3 _y ).

The three radio wave transmitting stations A1, A2,
A3 transmits radio waves of frequencies a1, a2, and a3, respectively. First, it is assumed that the moving body 7 exists at the position P1. In this case, the receiving device 6 of the mobile 7 provided with the receiving frequency selecting device receives the radio wave of the frequency a1 transmitted from the radio transmitting station A1 which is the closest.

Here, assuming that the mobile unit 7 has moved to the position P2, the receiving device 6 of the mobile unit 7 having the receiving frequency selection device transmits the broadcast signal to the nearest radio transmitting station A2.
Is automatically changed so as to receive the radio wave of frequency a2 transmitted from.

The operation of the reception frequency selecting apparatus according to the present embodiment is as shown in the flowchart of FIG. 3, and a case where the broadcast station A is designated on the operation panel 5 will be described as an example.

First, the position information of the moving body 7 is measured by the position measuring device 2 (s11). Next, the position information of the mobile unit 7 and the broadcast station information table 1a are selected by the selection unit 3.
From the position information of the plurality of radio transmission stations A1 to A3 of the middle broadcasting station A, it is determined whether or not the currently selected radio transmission station is closest to the mobile 7 (s12).

If the distance is the closest, the position of the moving body 7 is measured again by the position measuring means 2 (s11). If not, the frequency of the radio wave transmitting station closest to the moving body 7 is newly selected. Is output from the selection unit 3 to the receiver 4 (s13).

As described above, in the receiving frequency selecting apparatus according to the present embodiment, the frequency of the radio wave transmitting station closest to the mobile 7 is determined based on the position information of the radio wave transmitting stations A1 to A3 of the predetermined broadcasting station A. An instruction to select is output.

Therefore, when the receiving frequency selecting device according to the present embodiment is provided in the receiving device 6 of the mobile unit 7, even if the sensitivity is reduced due to the movement of the mobile unit 7, the frequency that can be received with the highest sensitivity is automatically set. , The sensitivity can be prevented from lowering.

Since any one of the frequencies a1 to a3 is automatically selected, it is not necessary to perform readjustment manually or the like. In the reception frequency selecting apparatus according to the present embodiment, the case of the broadcast station A has been described as an example, but the present invention is not limited to this case. The present invention can be similarly applied to various cases, such as when applied, and the same effect can be obtained by the same operation.

(Second Embodiment) The reception frequency selection device according to the present embodiment is a further improvement of the reception frequency selection device according to the first embodiment described above. Since the receiving device provided with the receiving frequency selecting device according to the present invention has the same configuration as in FIG. 1, the same description will be omitted.

In the receiving device 6 provided with the receiving frequency selecting device according to the present embodiment, the channel operation buttons 5a to 5c of the operation panel 5 are set so as to designate each of the broadcasting stations A to C.

In the selecting section 3, not only the radio station of the broadcasting station designated by the channel operation button but also the
Radio transmitting stations of other broadcasting stations not specified are also selected so that radio waves can be received with the best sensitivity at all times.

That is, in the receiving apparatus 6 provided with the receiving frequency selecting apparatus according to the present embodiment, the receiver only specifies the broadcasting stations A to C, and the optimum setting for each of the broadcasting stations A to C is performed. The radio transmitting station and its frequency are automatically and dynamically obtained by the selecting unit 3.

FIG. 4 is a conceptual diagram showing an example of radio wave reception in the mobile receiving apparatus 6 provided with the receiving frequency selecting apparatus according to the present embodiment. As an example, only the broadcasting station A is shown, and other broadcasting stations are shown. The illustration of stations B and C is omitted.

A plurality of broadcasting stations A to C are provided with a plurality of radio transmitting stations A1 to A3, B1 to B3 and C1 to transmit radio waves at different frequencies a1 to a3, b1 to b3 and c1 to c2, respectively.
I have C2.

Now, the mobile unit 7 is located at the position P1, and the broadcasting stations A to C are set to the channel operation buttons 5a to 5c of the operation panel 5, respectively. In the reception frequency selecting apparatus according to the present embodiment, all the broadcasting stations A to C set to the channel operation buttons 5a to 5c are set.
, The radio wave transmitting stations A1, B closest to the position P1
2, C1 and its frequencies a1, b2, c1 are selected.

Therefore, the receiver operates the channel operation button 5
When any one of the broadcasting stations A to C is designated by a to 5c, the receiving device 6 receives the radio wave at the frequency of the radio wave transmitting station closest to the position P1 of the designated broadcasting station.

Here, when the moving body 7 moves to the position P2, the receiving device 6 equipped with the receiving frequency selecting device transmits the radio wave transmitting stations A2, B3,
C2 and its frequencies a2, b3, c2 are dynamically determined.

Therefore, the receiver operates the channel operation button 5
When any one of the broadcasting stations A to C is designated by a to 5c, the receiving device 6 receives the radio wave at the frequency of the radio wave transmitting station closest to the position P2 of the designated broadcasting station.

The operation of the reception frequency selection device according to the present embodiment is shown in the flowchart of FIG. First, the position measurement device 2
Thus, the position of the moving body 7 is measured (s21). Next, the selector 3 selects all broadcast stations A to C
It is determined whether the radio wave transmitting station closest to the position of the moving object 7 is selected (s22).

When the selected radio wave transmitting stations of all the broadcasting stations A to C are closest to the position of the moving body 7, the position of the moving body 7 is measured again by the position measuring means 2 (s2).
1) If there is something that is not closest,
An instruction to newly select a radio wave transmitting station and its frequency close to is output from the selecting unit 3 to the receiver 4 (s23).

As described above, in the receiving frequency selecting apparatus according to the present embodiment, the closest radio transmitting station is obtained for all the broadcasting stations A to C, and the frequency of the obtained radio transmitting station is selected. Output an instruction to do so.

Therefore, when the receiving frequency selecting device according to the present embodiment is provided in the receiving device of the mobile unit 7, the same effects as those of the first embodiment can be obtained.
In addition, the receivers receive the frequencies a1 to a3, b
Instead of designating 1 to b3 and c1 to c2, broadcast stations A to C to be received are designated, and radio wave transmitting stations A1 to A3, B1 to B3, C1 to C2 of the broadcast stations A to C and their frequencies a1
Since there is no need to be aware of the selection or change of ~ a3, b1 ~ b3, c1 ~ c2, radio waves can be received with good sensitivity by a simple operation.

In this embodiment, not only the radio wave transmitting stations of the broadcasting stations specified by the channel operation buttons 5a to 5c but also the radio wave transmitting stations of the broadcasting stations not specified by the channel operation buttons 5a to 5c. Is always selected so that radio waves can be received with the best sensitivity. However, it is not always necessary to select a radio station of a broadcasting station not specified by the channel operation buttons 5a to 5c. Only the radio wave transmitting stations of the broadcasting stations designated by .about.5c may be selected so as to be able to receive radio waves with the best sensitivity.

In the present embodiment, broadcast station A
To C, the present invention is not limited to this case. For example, the number of broadcast stations can be two or four or more. The number of places can be changed freely.

(Third Embodiment) A receiving frequency selecting apparatus according to the present embodiment is obtained by adding another function to the function of the receiving frequency selecting apparatus according to the second embodiment described above. Since the receiving apparatus including the receiving frequency selecting apparatus according to the present embodiment has the same configuration as in FIG. 1, the same description will be omitted.

FIG. 6 is a conceptual diagram showing an example of radio wave reception in the mobile receiving device 6 provided with the receiving frequency selecting device according to the present embodiment. Here, the broadcasting stations A and D are shown as examples. The other broadcasting stations B, C, E, and F are not shown.

The broadcast station information table 1b includes each area X,
Each of Y (for example, X prefecture and Y prefecture) has broadcasting stations A to C and D to F that transmit radio waves in the area X and Y,
Each of these broadcasting stations A to F has at least one radio wave transmitting station A1 to F1.

When the mobile unit 7 is located in the area X, the broadcasting stations A to A are respectively assigned to the channel selection buttons 5a to 5c.
C is set according to the information in the broadcast station information table 1b. In addition, the closest radio station from the position P1 of the moving object 7 is selected as the radio wave transmitting station and its frequency for each of the broadcasting stations A to C.

Here, when the mobile 7 moves from the area X to the area Y, the channel selection buttons 5a to 5c are used by using the current position information of the mobile 7 and the broadcast station information table 1b.
Is automatically changed from the area X to the area Y.

Thus, the channel selection buttons 5a to 5a
5c, the broadcast stations DF are set according to the information of the broadcast station information table 1b. In addition, broadcasting station D ~
The radio wave transmitting station for each F and its frequency include the position P of the moving body 7.
The closest one from 2 is selected.

The operation of the receiving frequency selecting apparatus according to the present embodiment is shown in the flowchart of FIG. First, the position measurement device 2
Thus, the position of the moving body 7 is measured (s31). Next, the selecting unit 3 determines whether or not the area X of the moving object 7 has changed due to the movement (s32).

When the area X is changed by moving, the channel selection buttons 5a to 5c are displayed on the broadcasting station D of the new area Y.
To F are set (s33), and if not changed,
The position of the moving body 7 is measured again by the position measuring device 2 (s31).

As described above, in the receiving frequency selecting apparatus according to the present embodiment, the same effects as those of the receiving frequency selecting apparatus according to the second embodiment can be obtained. In addition, it is possible to output an instruction to automatically set the change of the broadcasting stations A to F caused by the change of the area X, Y.

Therefore, when the receiving frequency selecting device according to the present embodiment is provided in the receiving device of mobile unit 7, the receiving frequency selecting device according to the second embodiment described above is used as the receiving device of mobile unit 7. In addition to the same effect as in the case of preparing for the above, the setting of the broadcasting stations A to F is automatically changed by changing the area X and Y, so that it is possible to receive the radio wave of the broadcasting station suitable for the area. User's setting operation can be simplified.

In this embodiment, the broadcast station A
To C and the regions X and Y have been described as an example, but the present invention is not limited to this case, and can be applied in various cases as well, and the same effect is obtained by the same operation. Can be obtained.

In the frequency selection device provided with the reception frequency selection device according to the present embodiment, the setting of the channel selection buttons 5a to 5c is automatically changed when the area X and Y are changed. Even if the areas X and Y change, the receiver may not want to change them, so that the switching may be performed by manual operation or the like.

[0061]

As described above, according to the receiving frequency selecting apparatus of the present invention, the radio wave is most sensitive because of the relationship between the positional information of a plurality of transmitting stations possessed by the broadcasting station and the positional information of the moving object. Since the frequency of the transmitting station that can be received is obtained and the frequency of the obtained transmitting station is selected, by providing the receiving frequency selecting device of the present invention in the mobile receiving device, the frequency that can receive the most sensitive signal is automatically selected. Therefore, a decrease in sensitivity due to movement can be prevented.

Further, since the frequency is automatically selected, it is not necessary to perform readjustment manually or the like. Furthermore, according to the reception frequency selection device of another invention, the position information of each transmitting station of the broadcasting station designated by the broadcasting station designation means and the relationship between the position information of the moving object measured by the position measurement means From among the frequencies of the transmitting stations of the designated broadcasting station, the frequency of the transmitting station that can receive the radio wave with the highest sensitivity is determined, and the determined frequency is selected. , The same effect as the above invention can be obtained.

Further, the receiver does not specify the frequency of the radio wave to be received, but specifies the broadcast station to be received by the broadcast station specifying means, and is aware of the radio wave transmitting station of this broadcast station and the selection or change of the frequency. Since there is no need to perform the operation, radio waves can be received with a good sensitivity by a simple operation.

According to the reception frequency selection device of another invention, a broadcasting station belonging to an area is selected and selected from a plurality of broadcasting stations divided into a plurality of areas based on the positional information of the mobile unit. One of the broadcasting stations designated by the broadcasting station designating means, and the frequency of the transmitting station that can receive the radio wave with the highest sensitivity among the frequencies of the transmitting stations of the designated broadcasting station is determined. Since the selection is made, by providing the reception frequency selection device of the present invention in the mobile reception device, it is possible to receive the radio wave of the broadcasting station suitable for the area.

In addition, even if the broadcasting station is changed due to the change of the area, the frequency at which the radio wave can be received with the highest sensitivity among the frequencies of the transmitting stations of the broadcasting station designated by the broadcasting station designating means is selected. The same effect as the invention can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a receiving device including a receiving frequency selecting device according to a first embodiment of the present invention.

FIG. 2 is a conceptual diagram showing an example of radio wave reception in a mobile receiving device provided with the receiving frequency selecting device according to the embodiment.

FIG. 3 is a flowchart showing an example of the operation of the reception frequency selection device according to the embodiment.

FIG. 4 is a conceptual diagram showing an example of radio wave reception in a mobile receiving device provided with a receiving frequency selecting device according to a second embodiment of the present invention.

FIG. 5 is a flowchart showing an example of the operation of the reception frequency selection device according to the embodiment.

FIG. 6 is a conceptual diagram showing an example of radio wave reception in a mobile receiving device provided with a receiving frequency selecting device according to a third embodiment of the present invention.

FIG. 7 is a flowchart showing an example of the operation of the reception frequency selection device according to the embodiment.

FIG. 8 is a conceptual diagram showing an example of radio wave reception in a conventional mobile receiving device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Storage device 1a, 1b ... Broadcast station information table 2 ... Position measuring device 3 ... Selection part 4 ... Receiver 5 ... Operation panel 5a-5c ... Channel selection button 6 ... Receiving device 7 ... Mobile A-F ... Broadcasting station A1 to F1 radio wave transmitting station a1 to f1 frequency P1 to P2 position X, Y ... area

Claims (3)

[Claims] 1. A receiving frequency selecting device for selecting a frequency of a received radio wave in a mobile receiving device that receives any one of radio waves transmitted at different frequencies from a plurality of transmitting stations of a broadcasting station. Storage means for storing broadcast station information including position information and frequency information for each of a plurality of transmitting stations of the broadcast station; position measuring means for measuring position information of the mobile object; and the broadcast station information. From the relationship between the position information for each of the plurality of transmitting stations and the positional information of the moving object measured by the position measuring means, the frequency of the transmitting station that can receive radio waves with the highest sensitivity is obtained, and the obtained frequency is obtained. A receiving frequency selecting device, comprising: selecting means for selecting a frequency. 2. A frequency of a received radio wave in a mobile receiving apparatus that receives any one of radio waves transmitted at different frequencies from at least one transmitting station of each of a plurality of broadcast stations. A receiving frequency selecting apparatus, wherein a receiver designates any one of the plurality of broadcast stations, and a position information and frequency of at least one transmitting station for each of the plurality of broadcast stations. Storage means for storing broadcast station information including information, position measurement means for measuring position information of the mobile object, and a broadcast station designated by the broadcast station designation means among broadcast stations stored in the storage means From the relationship between the position information of each transmitting station and the position information of the moving object measured by the position measuring means, the highest sensitivity among the frequencies of the transmitting stations of the designated broadcasting station is obtained. Obtains a frequency signal reception, the reception frequency selection apparatus characterized by comprising a selection means for selecting the determined frequency. 3. A frequency of the received radio wave is selected from at least one transmitting station of each of a plurality of broadcasting stations in a mobile receiving apparatus that receives any one of radio waves transmitted at different frequencies. A receiving frequency selecting apparatus, wherein the receiver specifies a broadcasting station to specify any one of the plurality of broadcasting stations, and each of the plurality of broadcasting stations is divided into a plurality of regions. A plurality of storage means for storing broadcast station information including position information and frequency information of at least one transmitting station for each broadcast station to which the station belongs, a position measurement means for measuring position information of a mobile object, and the position measurement means Storage means selecting means for selecting a storage means corresponding to the measured position information; and a broadcast station stored in the storage means selected by the storage means selecting means. From the relationship between the position information of each transmitting station of the specified broadcasting station, the location information of the mobile object measured by said position measuring means by the specified means,
A receiving frequency selecting device for obtaining a frequency capable of receiving a radio wave with the highest sensitivity among the frequencies of the transmitting stations of the designated broadcasting station, and selecting the obtained frequency.