KR20070073374A - Method and apparatus for deciding optimum transmitting frequency in portable set having fm transmitter - Google Patents

Abstract

An optimum transmission frequency determination method of a portable terminal embedded with an FM(Frequency Modulation) transmitter and a device thereof are provided to enable the terminal to determine and display an optimum transmission frequency in a modem chip through information which converts strength of received propagation into a voltage, thereby improving communication quality. A portable terminal receives an FM signal by an FM transmitter antenna(210). The terminal enables the received FM signal to pass through an FM receiver via a circulator(220). The terminal selects a frequency of the received FM signal(230). The terminal senses power for the FM signal of the selected frequency, and sends information converted into voltage size to a modem chip(240). The terminal decides whether all frequencies are swept(250). If so, the terminal determines an optimum transmission frequency through the modem chip(260). The terminal displays the determined optimum transmission frequency through a display.

Description

METHOD AND APPARATUS FOR DECIDING OPTIMUM TRANSMITTING FREQUENCY IN PORTABLE SET HAVING FM TRANSMITTER}

1 is a view showing the configuration of a portable terminal according to the present invention.

2 is a flowchart illustrating a method of determining an optimal transmission frequency of a mobile terminal according to an embodiment of the present invention.

3 is a diagram illustrating a configuration of an apparatus for determining an optimum transmission frequency of a mobile terminal according to an embodiment of the present invention.

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

100: mobile terminal

110: antenna for FM transmitter

120: circulator

130: FM transmitter

140: FM receiver

150: power detector

160: modem chip

170, 350: display unit

300: optimum transmission frequency determination device

310: FM receiver

320: frequency selector

330: signal conversion unit

340: frequency determination unit

The present invention relates to a method and apparatus for determining an optimal transmission frequency of a portable terminal with an integrated FM transmitter. More particularly, the present invention relates to a method of converting the intensity of a received radio wave into a voltage using a circulator and a power detector. A method and apparatus for determining and displaying an optimal transmission frequency in a modem chip using information.

Recently, the mobile terminal has been widely used due to its convenience that it can be used anytime and anywhere. Accordingly, portable terminals have been developed in a tendency to provide a wide range of additional services to meet the needs of various users.

When a conventional portable terminal has an FM transmitter function, it is cumbersome for a user to manually search all frequency bands in order to find an optimal transmission frequency.

Therefore, there has been a great demand for a method of notifying a user by determining an optimal transmission frequency in a portable terminal.

SUMMARY OF THE INVENTION The present invention has been made to improve the above-described prior art, and is optimal in a modem chip using information obtained by converting the intensity of a radio wave received using a circulator and a power detector into a voltage in a portable terminal having an FM transmitter. It is an object of the present invention to provide a method and apparatus for determining a transmission frequency.

Another object of the present invention is to provide a method and apparatus for searching for and displaying an optimum transmission frequency in a portable terminal having an FM transmitter.

In order to achieve the above object and to solve the problems of the prior art, the present invention comprises the steps of receiving a signal from the antenna for the FM transmitter of the portable terminal with a built-in FM transmitter, a circulator (circulator) and power detector (power) determining an optimal transmission frequency by converting the strength of the received signal into a voltage using a detector and determining an optimum transmission frequency in a modem chip using the information about the voltage. Provide a method.

According to an aspect of the present invention, there is provided an apparatus for determining an optimum transmission frequency of a portable terminal having an embedded FM transmitter, including an FM receiver for receiving an FM signal, a frequency selector for selecting a frequency of the received FM signal, and the selected unit. A signal converting unit converts the strength of the FM signal with respect to the frequency into a voltage, and a frequency determining unit determining the optimum transmission frequency using the information about the voltage.

The portable terminal widely used in the present specification is a communication terminal such as a personal digital assistant (PDA), a smart phone, a handheld PC, a mobile phone, etc., and includes a module for performing an FM transmitter function. It is a concept that collectively refers to a terminal having the ability to perform the function of transmitting FM signals.

Hereinafter, a method and apparatus for determining an optimum frequency of a mobile terminal according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the configuration of a portable terminal according to the present invention.

Referring to FIG. 1, the mobile terminal 100 includes an FM transmitter antenna 110, a circulator 120, an FM transmitter 130, an FM receiver 140, a power detector 150, a modem chip 160, and The display unit 170 is included.

The FM transmitter antenna 110 receives a reception (Rx) signal transmitted from the outside and transmits the received signal to the circulator 120.

That is, the FM transmitter antenna 110 may receive an FM received signal transmitted from the outside and transmit the received FM received signal to the circulator 120.

The FM transmitter antenna 110 receives a transmission signal from the circulator 120 and transmits the transmitted signal to the outside.

That is, the FM transmitter antenna 110 may receive the FM transmission signal from the circulator 120 and transmit the transmitted FM transmission signal to the outside.

The circulator 120 transmits a reception (Rx) signal received through the FM transmitter antenna 110 to the FM receiver 140, and the received reception (Rx) signal is not transmitted to the FM transmitter 130. Do not

That is, the circulator 120 may pass the FM signal received through the FM transmitter antenna 110 to the FM receiver 140 to prevent the received FM signal from entering the FM transmitter 130.

In addition, the circulator 120 transmits a transmission (Tx) signal generated from the FM transmitter 130 to the antenna for the FM transmitter 110 and prevents the transmission (Tx) signal from being transmitted to the FM receiver 140. .

That is, the circulator 120 may pass the FM signal generated from the FM transmitter 130 to the FM transmitter antenna 110 to prevent the FM signal from entering the FM receiver 140.

The FM transmitter 130 performs an operation related to the transmission of the FM signal to be transmitted from the mobile terminal 100 to the outside. That is, the FM transmitter 130 generates an FM signal to be transmitted from the portable terminal 100 to the outside, and transmits the generated FM signal to the FM transmitter antenna 110 through the circulator 120.

The FM receiver 140 receives the FM signal received from the FM transmitter antenna 110 through the circulator 120 and selects a signal having a desired frequency through frequency tuning for the received FM signal.

The FM receiver 140 may also perform a function of receiving and listening to FM, and may be replaced by a simple frequency selection circuit.

The power detector 150 detects the strength of the FM signal of the frequency selected by the FM receiver 140 and outputs the strength of the detected signal as a signal converted into the magnitude of the voltage.

The modem chip 160 receives a signal output from the power detector 150 and recognizes the magnitude of the input signal.

The modem chip 160 determines whether the FM receiver 140 has sweeped all frequencies corresponding to a predetermined range.

When all frequencies corresponding to the predetermined range are swept, the modem chip 160 determines a band having the lowest power as an optimal transmission frequency based on the information.

The modem chip 160 transmits the determined optimal frequency information to the display unit 170.

The modem chip 160 instructs the FM receiver 140 to select another frequency band when all frequencies corresponding to the predetermined range are not swept.

The display unit 170 displays optimal frequency information transmitted from the modem chip 160.

As described above, the portable terminal according to the present invention can easily determine the optimum transmission frequency by determining and displaying the band with the lowest power as the optimum transmission frequency based on the information on the voltage of the received signal.

2 is a flowchart illustrating a method of determining an optimal transmission frequency of a mobile terminal according to an embodiment of the present invention.

1 and 2, in step 210, the mobile terminal 100 receives an FM signal by the antenna for the FM transmitter 110.

In step 220, the mobile terminal 100 allows the received FM signal to pass through the circulator 120 to the FM receiver 140.

That is, in step 220, the mobile terminal 100 passes the transmission (Tx) signal generated by the FM transmitter to the FM transmitter antenna 110 through the circulator 120 and from the FM transmitter antenna 110. The received receive (Rx) signal may be passed toward the FM receiver 140.

In step 230, the mobile terminal 100 selects the frequency of the received FM signal through frequency tuning by the FM receiver 140.

In operation 240, the mobile terminal 100 detects the power of the FM signal of the selected frequency through the power detector 150 and transmits the information converted into the magnitude of the voltage to the modem chip 160.

In operation 250, the mobile terminal 100 determines whether the FM receiver 140 has swept all frequencies corresponding to a predetermined range through the modem chip 160.

When all frequencies corresponding to the predetermined range are swept, in step 260, the mobile terminal 100 determines the optimum transmission frequency through the modem chip 160 using the transmitted information.

That is, when the FM receiver 140 has swept all the frequencies corresponding to the predetermined range, the mobile terminal 100 at step 260 has the lowest power based on the transmitted voltage information through the modem chip 160. The band may determine the optimal transmission frequency.

In operation 270, the mobile terminal 100 displays the determined optimum transmission frequency through the display unit 170.

If all frequencies corresponding to the predetermined range are not swept, in step 280, the mobile terminal 100 instructs the FM receiver 140 to select another frequency band through the modem chip 160.

As described above, in the method for determining an optimum frequency of a mobile terminal according to the present invention, a user can easily identify a channel having an optimal frequency by determining and displaying a band having the lowest power as an optimal transmission frequency based on information on voltage of a received signal. have.

3 is a diagram illustrating a configuration of an apparatus for determining an optimum transmission frequency of a mobile terminal according to an embodiment of the present invention.

Referring to FIG. 3, the apparatus 300 for determining an optimum transmission frequency includes an FM receiver 310, a frequency selector 320, a signal converter 330, a frequency determiner 340, and a display 350. .

The FM receiver 310 receives an FM signal through the FM transmitter antenna 110 as shown in FIG. 1.

The frequency selector 320 selects a frequency of the received FM signal. That is, the frequency selector 320 may select a frequency of the received FM signal through frequency tuning for the received FM signal. The frequency selector 320 may be replaced with the FM receiver 140 as shown in FIG.

The signal converter 330 converts the strength of the FM signal with respect to the selected frequency into a voltage, and transmits information about the converted voltage to the frequency determiner 340.

That is, the signal converter 330 detects the power of the FM signal for the selected frequency through the power detector 150 as shown in FIG. 1, converts the detected power into a magnitude of voltage, and converts the power. Information about the received voltage may be transmitted to the frequency determiner 340.

The frequency determiner 340 determines the optimum transmission frequency using the information about the transmitted voltage.

That is, when all frequencies corresponding to the predetermined range are swept, the frequency determiner 340 may determine a band having the lowest power as the optimum transmission frequency based on the information on the voltage.

The frequency determiner 340 instructs the frequency selector 320 to select another frequency band when all frequencies corresponding to the predetermined range are not swept.

The frequency selector 320 receives a command from the frequency determiner 340 to select a different frequency band, and selects a frequency band different from the frequency previously selected in response to the command.

The frequency determiner 340 may be implemented with a modem chip 160 as shown in FIG. 1.

The frequency determiner 340 transmits the determined optimum transmission frequency information to the display 350.

The display 350 displays the optimum transmission frequency information transmitted from the frequency determiner 340.

As described above, the apparatus for determining the optimum frequency of the portable terminal according to the present invention can easily identify the optimum transmission frequency by determining and displaying the band with the lowest power as the optimum transmission frequency based on the information on the voltage of the received signal.

Accordingly, the apparatus for determining an optimum frequency of a portable terminal according to the present invention finds and displays an optimal transmission frequency in a portable terminal in which the FM transmitter is embedded, so that the user can use the FM transmitter lightly in a car or at home.

Embodiments of the invention also include computer-readable media containing program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The medium or program instructions may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. Examples of program instructions include machine language code, such as that produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

According to the present invention, it is possible to provide a method and apparatus for determining an optimal transmission frequency in a portable terminal incorporating an FM transmitter.

In addition, according to the present invention, it is possible to improve the communication quality of the FM transmitter by finding the optimum transmission frequency in the portable terminal with the built-in FM transmitter.

In addition, according to the present invention, by searching for and displaying an optimal transmission frequency in a portable terminal with a built-in FM transmitter, it may help a user who hesitates channel selection.

Claims (13)

In the method for determining the optimum transmission frequency of a portable terminal with an embedded FM transmitter, Receiving a signal at an antenna for the FM transmitter; Converting the strength of the received signal into a voltage using a circulator and a power detector; And Determining an optimal transmission frequency in a modem chip using the information about the voltage Optimal transmission frequency determination method comprising a. The method of claim 1, The step of converting the strength of the received signal into a voltage using the circulator and the power detector, Passing a received (Rx) signal toward an FM receiver in the circulator; Selecting a frequency at the FM receiver; And Detecting power of the selected frequency by the power detector, converting the power of the selected frequency into information of a voltage, and transmitting the power to the modem chip; Optimal transmission frequency determination method comprising a. The method of claim 2, The step of passing the received (Rx) signal to the FM receiver side in the circulator, The circulator transmits the Tx signal generated by the FM transmitter to the antenna for the FM transmitter so as not to enter the FM receiver, and the Rx signal passes to the FM receiver. Transmission frequency determination method. The method of claim 2, The step of selecting a frequency in the FM receiver, And selecting the frequency through frequency tuning in the FM receiver. The method of claim 2, Determining whether the FM receiver has swept all frequencies corresponding to a predetermined range in the modem chip; The determining of the optimum transmission frequency in the modem chip using the information on the voltage, And when all frequencies corresponding to the predetermined range are swept, determining, by the modem chip, a band having the lowest power as the optimum transmission frequency based on the transmitted information. The method of claim 5, And instructing the FM receiver to select a different frequency band in the modem chip if all frequencies corresponding to the predetermined range are not swept. The method of claim 1, And displaying the determined optimal transmission frequency. A computer-readable recording medium in which a program for executing the method of any one of claims 1 to 7 is recorded. In the device for determining the optimum transmission frequency of a portable terminal with a built-in FM transmitter, An FM receiver for receiving an FM signal; A frequency selector which selects a frequency of an always-received FM signal; A signal converter converting the strength of the FM signal for the selected frequency into a voltage; And Frequency determining unit for determining the optimum transmission frequency using the information on the voltage Apparatus for determining an optimum transmission frequency comprising a. The method of claim 9, The signal converter, And detecting power of the FM signal with respect to the selected frequency and converting the power of the FM signal into a magnitude of voltage. The method of claim 9, The frequency determiner, And when all frequencies corresponding to the predetermined range have been swept, determining a band having the lowest power as the optimum transmission frequency based on the information on the voltage. The method of claim 9, The frequency determiner, And when all frequencies corresponding to the predetermined range are not swept, instructing the frequency selector to select another frequency band. The method of claim 9, And a display unit for displaying the determined optimal transmission frequency.

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