KR20070023209A - Apparatus for receiving radio broadcasting in Mobile Communication Terminal - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a radio broadcast receiving apparatus in a portable terminal.

2. The technical problem to be solved by the invention

The present invention, when listening to a radio broadcast in a portable terminal detects the strength of the radio wave and enters the weak field area, if the efficient FM broadcast reception is not possible to control by the control unit to listen to the FM standard broadcast of the same frequency to the AM receiver in the weak field area The present invention provides a radio broadcast receiving apparatus in a portable terminal for acquiring location information and automatically changing to a radio broadcast frequency corresponding to a current location of the terminal according to pre-stored regional frequencies. has exist.

3. Summary of Solution to Invention

The present invention provides a radio broadcast receiving apparatus in a portable terminal, comprising: an antenna for receiving standard FM broadcast and standard AM radio broadcast signal; Distribution means for distributing power of the received FM broadcast signal and the AM broadcast signal; Coupling means for extracting an FM broadcast signal provided from said distribution means; FM tuning means for receiving the FM broadcast signal; Frequency detecting means for detecting the intensity of the frequency of the FM broadcast signal extracted from the coupling means and providing an ADC value representing the frequency intensity of the received FM broadcast signal according to a Local Oscillator (LO) frequency; AM tuning means for receiving an AM broadcast signal; And if the ADC value representing the strength of the received FM frequency is equal to or greater than a reference value (strong electric field), the FM broadcast signal is continuously received through the FM tuning means, and the ADC value representing the strength of the received FM frequency is determined by a predetermined program. And control means for controlling the AM tuning means to receive the FM broadcast signal at an AM frequency suitable for the FM broadcast if it is less than the reference value (weak field).

4. Important uses of the invention

Industrial Applicability The present invention is used for a radio broadcast receiving apparatus in a portable terminal.

Handheld terminal, radio broadcast, receiving device, location information acquisition, automatic frequency change

Description

Apparatus for receiving radio broadcasting in Mobile Communication Terminal}

1 is a diagram showing the configuration of a portable terminal incorporating a conventional FM radio receiver;

2 is a block diagram of a radio broadcast receiving apparatus in a portable terminal according to a first embodiment of the present invention;

3 is a block diagram of a radio broadcast receiving apparatus in a portable terminal according to a second embodiment of the present invention.

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

10: antenna 20: splitter

30: coupler 40: FM tuner

50: frequency detector 51: PLL

52: mixer 53: filter

54: ADC 60: AM Tuner

70: control unit 80: storage unit

90: GPS receiver 91: RF transceiver

The present invention relates to a radio broadcast receiving apparatus in a portable terminal, and more particularly, to detect radio wave strength when listening to a radio broadcast in a portable terminal, and enters a weak electric field area when the effective FM broadcast reception is not possible. The AM receiver can listen to FM standard broadcasts of the same frequency in the electric field and acquire location information and automatically change to the radio broadcast frequency corresponding to the current location of the terminal according to the pre-stored local frequencies to listen to the radio broadcast. The present invention relates to a radio broadcast receiving apparatus in a portable terminal.

In the present invention, a portable terminal refers to a portable terminal such as a mobile communication terminal, a personal mobile communication terminal (PCS), a personal digital assistant (PDA), a smartphone, a next generation mobile communication terminal (IMT-2000), a wireless LAN terminal, and the like. Say.

1 is a view showing the configuration of a portable terminal incorporating a conventional FM radio receiver.

As shown in FIG. 1, a portable terminal having a conventional FM radio receiver includes an input unit 11 for receiving a user's control command by a keypad or the like, and a controller for controlling each component of the terminal. 12), a wireless transceiver 13 for transmitting and receiving voice and packet data and control information to and from the base station wirelessly, and a radio receiver 14 for detecting and demodulating a selected frequency according to a set channel by receiving an FM radio signal from an antenna. And a storage unit 19 for storing a terminal control application program and related data, a program and file system (image, character, icon) for driving the wireless communication terminal, its own terminal information, and various data. Signal received from the radio receiver 14 or received from the radio transceiver 13 under the control of (12). Convert the call into voice and output it to the voice output unit 17, convert the voice received from the voice input unit 16 to a signal and transmit it to the control unit 12 to be transmitted through the wireless transceiver 13 A codec 15 for receiving a voice, a voice output unit 17 for outputting the voice received from the codec 15, and a voice input unit for receiving the voice and transmitting the received voice to the codec 50. And a display unit 18 for displaying the output data in accordance with the menu function of the terminal.

In this case, the portable terminal with the built-in radio receiver selects a radio broadcast reception on a menu screen, and adjusts a channel to tune to a corresponding broadcast frequency to receive a radio broadcast. Done.

However, conventionally, when only the FM radio receiver is mounted on a portable terminal to listen to a radio broadcast, there is a problem in that the radio broadcast cannot be heard well when entering a weak field or a shaded area.

The present invention has been proposed to solve the above problems, by designing an AM tuner and a detection circuit in a portable terminal equipped with an FM receiver, it is effective to enter the weak field by detecting the strength of the radio wave when listening to a radio broadcast in the portable terminal. It is an object of the present invention to provide a radio broadcast receiving apparatus in a portable terminal, in which a FM control unit can listen to the FM standard broadcast of the same frequency by controlling the control unit when the FM broadcast reception is impossible.

In addition, another apparatus of the present invention is to design an AM tuner and a detection circuit in a portable terminal equipped with an FM receiver to detect the strength of the radio wave when entering the weak field when listening to a radio broadcast from the portable terminal, and efficient FM broadcast reception is achieved. If it is not possible, the controller can control the FM standard broadcast of the same frequency in the weak field by controlling it in the weak electric field, and acquire location information and automatically change to the radio broadcast frequency corresponding to the current location of the terminal according to the pre-stored local frequency. It is an object of the present invention to provide a radio broadcast receiving apparatus in a portable terminal for listening to a radio broadcast.

In addition, another apparatus of the present invention, the radio broadcast receiving apparatus in a portable terminal for acquiring position information and automatically changing to a radio broadcast frequency corresponding to the current position of the terminal according to the pre-stored regional frequency to listen to the radio broadcast. The purpose is to provide.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In accordance with one aspect of the present invention, an apparatus for receiving a radio broadcast in a portable terminal includes: an antenna for receiving a standard FM broadcast and a standard AM radio broadcast signal; Distribution means for distributing power of the received FM broadcast signal and the AM broadcast signal; Coupling means for extracting an FM broadcast signal provided from said distribution means; FM tuning means for receiving the FM broadcast signal; Frequency detecting means for detecting the intensity of the frequency of the FM broadcast signal extracted from the coupling means and providing an ADC value representing the frequency intensity of the received FM broadcast signal according to a Local Oscillator (LO) frequency; AM tuning means for receiving an AM broadcast signal; And if the ADC value representing the strength of the received FM frequency is equal to or greater than a reference value (strong electric field), the FM broadcast signal is continuously received through the FM tuning means, and the ADC value representing the strength of the received FM frequency is determined by a predetermined program. Control means for controlling the AM tuning means to receive the FM broadcast signal at an AM frequency suitable for the FM broadcast if it is less than the reference value (weak field).

In addition, the apparatus of the present invention is connected to the control means, the storage means for storing the database (DB) and the data indicating the regional frequency difference according to the frequency of the FM standard broadcast frequency and AM standard broadcast to the database (DB) ; And acquiring the current position information by a GPS receiver connected to the control means, or periodically obtaining the position information through the antenna and the RF transceiver of the terminal through a base station from a location based system (LBS). The apparatus further comprises a location information receiving means, wherein the control means refers to a radio broadcasting frequency corresponding to a location of a corresponding region by referring to database (DB) information including a frequency for each region stored in the storage means according to the received location information. (E.g. MBC Radio Seoul 89.1 MHz, Busan 93.0 MHz) is automatically converted to receive the desired FM broadcast signal without changing the frequency by region.

Another apparatus of the present invention for achieving the above object is a radio broadcast receiving apparatus in a portable terminal, comprising: radio receiving means for receiving a radio signal; Control means for automatically controlling a change to a radio broadcast frequency corresponding to a current location of the terminal according to the pre-stored regional frequency according to the obtained location information; Storage means connected to the control means and configured to store a database (DB) of data representing regional frequency differences and regional frequency data according to a standard broadcasting frequency; And location information receiving means for obtaining current location information of the terminal.

The above objects, features, and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. Could be. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

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

2 is a block diagram of a radio broadcast receiving apparatus in a portable terminal according to a first embodiment of the present invention.

As shown in FIG. 2, the apparatus for receiving a radio broadcast in a portable terminal according to the present invention includes an antenna 10 for receiving a standard FM broadcast and a standard AM radio broadcast signal, and power of the received FM broadcast signal and the AM broadcast signal. Splitter 20 for distributing the signal, coupler 30 for extracting the FM broadcast signal provided from the distributor 20, FM tuner 40 for receiving the FM broadcast signal, FM extracted from the coupler 30 Frequency detector 50 for detecting the strength of the frequency of the broadcast signal to provide an ADC value indicating the strength of the received FM frequency according to the Local Oscillator (LO) frequency, AM tuner for receiving AM broadcast signal ( 60) If the ADC value indicating the strength of the received FM frequency by a predetermined program is greater than or equal to a predetermined reference value (a strong electric field), the FM broadcast signal is continuously received and the strength of the received FM frequency is indicated. A control unit 70 for controlling the AM tuner 60 to receive the FM broadcast signal at an AM frequency suitable for the FM broadcast if the ADC value is below a predetermined reference value (weak electric field), and the FM standard broadcast frequency and the frequency of the AM standard broadcast. According to the present invention, a storage unit 80 for storing the data representing the regional frequency difference and the regional frequency data into a database (DB) is stored.

In addition, by the GPS (Global Positioning System) receiver 90 connected to the control unit 70 to obtain the current position information of the terminal from 3-4 GPS satellites, or periodically from a Location Based System (LBS) It further comprises a location information receiving means for obtaining location information through the antenna and the RF transceiver 91 of the terminal through the base station.

The frequency detector 50 detects the strength of the frequency of the received FM broadcast signal, and includes a phase locked loop (PLL) 51 for providing a local oscillator (LO) frequency. A mixer 52, an IF SAW filter, is used to provide the FM broadcast signal extracted from the coupler 30 in accordance with a local oscillator (LO) frequency provided from a phase locked loop (PLL) 51, the noise of the IF signal. A filter 53 for removing the A, and an A / D converter 54 for A / D converting the extracted FM broadcast signal to provide an ADC value representing the strength of the frequency of the received FM broadcast signal. Include.

Accordingly, when listening to a radio broadcast in a portable terminal, the frequency of the frequency of the FM broadcast signal received is detected, and if the strong electric field of a predetermined reference value or more by the control unit 70 continues to receive the FM broadcast through the FM tuner 40, If it is determined that the weak electric field is less than a predetermined reference value, since it is a weak electric field or a transliteration region where efficient FM broadcast reception is impossible, the controller 70 controls and listens to the FM broadcast signal at an AM frequency suitable for the FM broadcast through the AM tuner 60. .

3 is a block diagram of a radio broadcast receiving apparatus based on location information in a portable terminal according to a second embodiment of the present invention.

As shown in FIG. 3, the apparatus for receiving a radio broadcast in a portable terminal according to the present invention includes an antenna 10 for receiving a standard FM broadcast and a standard AM radio broadcast signal, and power of the received FM broadcast signal and the AM broadcast signal. A splitter 20 for distributing a signal, a coupler 30 for extracting an FM broadcast signal provided from the splitter 20, an FM tuner 40 for receiving the FM broadcast signal, and an extractor from the coupler 30. Frequency detector 50 for detecting the strength of the frequency of the FM broadcast signal to provide an ADC value indicating the strength of the received FM frequency according to the Local Oscillator (LO) frequency, AM tuner for receiving AM broadcast signal 60, the control unit 70 for automatically controlling the change to the radio broadcast frequency corresponding to the current location of the terminal according to the pre-stored regional frequency by the obtained position information, the control Storage unit 80 and the control unit 70 is connected to the 70, and for storing the database (DB) of the data indicating the regional frequency difference and the regional frequency data according to the frequency of the FM standard broadcast frequency and AM standard broadcast Global Positioning System (GPS) receiver 90 for obtaining current position information from 3-4 GPS satellites, and a location-based system (LBS) connected to the control unit 70. It periodically includes an RF transceiver 91 for acquiring position information through an antenna of a terminal through a base station.

Therefore, the GPS receiver 90 or the RF transceiver 91 is connected to the controller 70 to check the current location information of the terminal, and according to the pre-stored regional frequency by the obtained location information. You can listen to radio stations by automatically changing to the radio station corresponding to the location.

As a result, the radio broadcast receiving apparatus in the portable terminal according to the present invention performs the following two functions.

First, location information (local information) can be obtained from a base station in a portable terminal. Once the FM standard broadcast is stored in the storage unit 80 connected to the control unit 70, database (DB) information is stored in the storage unit 80 connected to the control unit 70. have.

When the portable terminal periodically changes the location according to the location information received from the base station, the controller 70 refers to database (DB) information including the frequency data for each region stored in the storage unit 80, and then, It automatically converts to the radio broadcast frequency of the corresponding channel (eg MBC FM radio channel) according to the location so that you can listen to the desired FM broadcast without changing the regional frequency.

For example, MBC radio is 89.1 MHz in Seoul, but 93.0 MHz in Busan. Currently, a user with a portable terminal with a built-in radio receiver needs to change the frequency (eg MBC Radio Seoul 89.1 MHz to Busan 93.0 MHz) to listen to FM radio when moving from Seoul to Busan. Localized frequency in the database (DB), and receives the current location information of the terminal via the GPS receiver 90 or RF transceiver 91 and periodically the control unit 70 according to the location information obtained from the base station You can automatically change the radio frequency.

Second, when the FM standard broadcast reception that we are listening to in the weak field or the shadow area by the frequency detector 50 is not desired, the AM tuner 60 is operated by the controller 70 to fit the FM broadcast. Listen to the same FM standard broadcast at the AM frequency.

In addition, when the user having the portable terminal with the radio receiver enters the strong electric field again, the frequency detector 50 continuously monitors and controls the control unit 70 to restore the FM standard through the FM tuner 40. You can listen to the broadcast.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

According to the present invention, the AM tuner and the detection circuit are designed in a portable terminal equipped with an FM receiver to detect the intensity of radio waves when listening to a radio broadcast in the portable terminal, and then receive the FM broadcast through the FM tuner in a strong electric field. When entering the electric field, efficient FM broadcasting cannot be received. Therefore, it can be controlled by the controller to listen to FM standard broadcasting at the same frequency (AM frequency suitable for FM broadcasting) with the AM tuner in the weak electric field.

In addition, there is an effect of providing the convenience to use the desired FM standard broadcast without changing the frequency without noise even when moving the area by acquiring the location information.

Claims (7)

A radio broadcast receiving apparatus in a portable terminal, An antenna for receiving standard FM broadcast and standard AM radio broadcast signals; Distribution means for distributing power of the received FM broadcast signal and the AM broadcast signal; Coupling means for extracting an FM broadcast signal provided from said distribution means; FM tuning means for receiving the FM broadcast signal; Frequency detecting means for detecting the intensity of the frequency of the FM broadcast signal extracted from the coupling means and providing an ADC value representing the frequency intensity of the received FM broadcast signal according to a Local Oscillator (LO) frequency; AM tuning means for receiving an AM broadcast signal; And If the ADC value indicating the strength of the received FM frequency is higher than the reference value (strong electric field), the FM broadcast signal is continuously received through the FM tuning means, and the ADC value indicating the strength of the received FM frequency is determined by the predetermined program. Control means for controlling the AM tuning means to receive the FM broadcast signal at an AM frequency suitable for the FM broadcast if less than (weak field) Radio broadcast receiving device in a portable terminal comprising a. The method of claim 1, A storage means connected to the control means and configured to store a database (DB) of data representing regional frequency differences and regional frequency data according to FM standard broadcasting frequencies and AM standard broadcasting frequencies; And a position for acquiring current position information by a GPS receiver connected to the control means or for obtaining position information through an antenna and an RF transceiver of a terminal through a base station periodically from a location based system (LBS). The apparatus may further include information receiving means, wherein the control means refers to database information including a region-specific frequency stored in the storage means when the region is changed according to the received position information, and corresponds to a radio broadcasting frequency corresponding to the position of the region. Example: MBC radio Seoul 89.1 MHz, Busan 93.0 MHz) automatically converts to a radio broadcast receiving device in a portable terminal, characterized in that it performs the function of receiving the desired FM broadcast signal without changing the frequency by region. The method of claim 1, The frequency detecting means, A phase locked loop (PLL) for providing the local oscillator (LO) frequency; A mixer for providing an FM broadcast signal extracted from the coupler according to a local oscillator (LO) frequency provided from the phase locked loop (PLL); An IF SAW filter, the filter for removing noise of the IF signal; And A / D converter (ADC) for A / D conversion of the extracted FM broadcast signal to provide an ADC value representing the strength of the frequency of the received FM broadcast signal Radio broadcast receiving device in a portable terminal comprising a. The method of claim 1, The control means, When listening to a radio broadcast, the frequency detection means detects the strength of the frequency of the FM broadcast signal extracted from the coupling means, and if the ADC value representing the strength of the received FM frequency is determined to be a strong electric field above a predetermined reference value, the FM tuning. Means to continuously receive the FM broadcast, and if the ADC value indicating the strength of the received FM frequency is determined to be a weak electric field below a predetermined reference value, listening to the FM broadcast signal at an AM frequency suitable for the FM broadcast through the AM tuning means; Radio broadcasting receiver in a portable terminal, characterized in that. A radio broadcast receiving apparatus in a portable terminal, Radio receiving means for receiving a radio signal; Control means for automatically controlling a change to a radio broadcast frequency corresponding to a current location of the terminal according to the pre-stored regional frequency according to the obtained location information; Storage means connected to the control means and configured to store a database (DB) of data representing regional frequency differences and regional frequency data according to a standard broadcasting frequency; And Location information receiving means for obtaining current location information of the terminal Radio broadcast receiving device in a portable terminal comprising a. The method of claim 5, wherein The location information receiving means, And a GPS (Global Positioning System) receiving means connected to the control means for obtaining current position information from a GPS satellite. The method of claim 5, wherein The location information receiving means, And an RF transmission / reception means for acquiring location information through an antenna of a terminal periodically through a base station from a location based system (LBS) connected to the control means.

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