JP2006128945A - Portable telephone communication suppression system, method and program for controlling same, and channel suppressing circuit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system configuration which is simple, inexpensive, and capable of achieving a desired suppression effect by jamming radio waves of a desired transmission output power. <P>SOLUTION: The portable telephone communication suppression system is composed of a control channel transmission unit Ta, a speech channel transmission unit Tb, a control channel control unit 300a, and a speech channel control unit 300b. The transmission units Ta and Tb are composed of high-frequency circuits 100a and 100b and antennas 200a and 200b, respectively. The control channel transmission unit Ta transmits jamming radio waves having the same frequency with the control channel. The speech channel transmission unit Tb transmits jamming radio waves of bandwidth containing two or more frequencies identical to those of the speech channels. The high-frequency circuit is composed of a PLL controller setting up frequency, a loop filter which outputs a control voltage corresponding to the frequency, a VCO which oscillates high-frequency signals having frequencies corresponding to the control voltage, a high-frequency amplifier, a high-frequency low-pass filter, a modulation oscillating circuit oscillating modulating signals, and a signal adder. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technology for inhibiting a communication function of a mobile phone by interfering with radio waves of a control channel and a plurality of call channels transmitted from a base station of a mobile phone system to a mobile station.

  With the recent widespread use of mobile phones in recent years, the use of mobile phones in a space where voice and radio waves from mobile phones are inconvenient has become a problem. In many cases, calling mobile phone users to urge them to voluntarily turn off their power, etc., but in addition to various circumstances of users who wish to use mobile phones in the space, there are simple reasons for carelessness. In many cases, it is difficult for all mobile phone users to reliably perform operations such as power-off.

  In view of such circumstances, recently, various technologies have been developed to forcibly suppress the use of a mobile phone in a specific space, and one of such technologies is a mobile phone system. There is a technology that blocks polling of mobile phone receivers and blocks communication by transmitting a jamming radio wave to a radio wave transmitted from a base station to a mobile station to form a barrier network .

  Conventionally, as such a cellular phone communication suppression system, for example, as shown in FIG. 11, there is a method of emitting a dedicated jamming radio wave to each control / call channel. In the system shown in FIG. 11, dedicated jamming waves are emitted to the control channel Ca and the plurality of call channels Cb1 to Cbn by the dedicated transmission units T1 to Tn + 1 for each channel. Each of the transmitters T1 to Tn + 1 includes a high-frequency circuit 100 that generates a high-frequency signal having the same frequency as each channel and an antenna 200 that transmits the generated high-frequency signal.

As another method of the mobile phone communication suppression system, for example, as shown in FIG. 12, there is a method of emitting jamming radio waves in a predetermined frequency band that covers a number of channels including control / call channels. In the system shown in FIG. 12, jamming radio waves in a predetermined frequency band including all channels are emitted from one transmission unit T to the control channel Ca and the plurality of call channels Cb1 to Cbn. The transmission unit T includes a high-frequency circuit 100 that generates a high-frequency signal in the predetermined frequency band and an antenna 200 that transmits the generated high-frequency signal.
JP 2002-125267 A JP2003-23660

  However, the conventional mobile phone communication suppression system as described above has the following problems. That is, as shown in FIG. 11, the method of emitting dedicated jamming radio waves for each control / call channel requires a large number of transmitters T1 to Tn + 1 for emitting each jamming radio wave. The system configuration becomes complicated and expensive. Also, as shown in FIG. 12, in the method of emitting jamming radio waves in a predetermined frequency band that covers a large number of channels including a wide frequency band of jamming radio waves to be emitted, a desired transmission output can be obtained. In addition, there is a problem that a desired deterrent effect cannot be obtained because all the target channels cannot be covered depending on the modulation frequency.

  The present invention has been proposed in order to solve the above-described problems of the prior art, and its object is to achieve a desired deterrent effect by a disturbing radio wave of a desired transmission output with a simple and inexpensive system configuration. It is an object of the present invention to provide a mobile phone communication suppression system, a control method and control program therefor, and a channel suppression circuit that can be obtained.

  In order to achieve the above object, the present invention transmits a jamming radio wave of a control channel and a jamming radio wave of a bandwidth that covers a plurality of communication channels by separate circuits, thereby providing a simple and inexpensive system configuration. A desired deterrence effect can be obtained by a jamming radio wave having a desired transmission output.

  The invention of claim 1 is a mobile phone communication suppression system for blocking a communication function of a mobile phone by interfering with radio waves of a control channel and a plurality of call channels transmitted from a base station of the mobile phone system to a mobile station. A control channel suppression circuit for transmitting jamming radio waves having the same frequency as that of the control channel, and a call channel suppression circuit for transmitting jamming radio waves having a bandwidth including a plurality of frequencies identical to those of the plurality of call channels are provided. And

  The invention of claim 7 grasps the invention of claim 1 from the viewpoint of the control method, and obstructs the radio waves of the control channel and a plurality of communication channels transmitted from the base station of the mobile phone system to the mobile station. The cellular phone communication inhibition control method for inhibiting the cellular phone communication function includes a control channel inhibition step and a communication channel inhibition step. Here, the control channel suppression step is a step of transmitting jamming radio waves having the same frequency as that of the control channel by the control channel suppression circuit, and the communication channel suppression step is performed by the communication channel suppression circuit and the plurality of communication channels. This is a step of transmitting jamming waves having a bandwidth including the same plurality of frequencies.

  The invention of claim 8 grasps the inventions of claims 1 and 7 from the viewpoint of a control program, and realizes the control channel suppression step and the speech channel suppression step of claim 7 by a computer. Features.

  According to the invention as described above, a jamming radio wave having the same frequency as that of the control channel is transmitted by the control channel deterrent circuit, and a jamming radio wave having a bandwidth including the same frequency as that of the plurality of call channels is transmitted by the call channel deterrent circuit. By transmitting this, the system can be configured in a simple and inexpensive manner compared to the case where it is suppressed by a dedicated circuit for each channel. Further, since the jamming radio wave transmitted by the control channel suppression circuit is sufficient at the same single frequency as the control channel, a desired transmission output can be easily obtained and the target control channel can be steadily changed. It can be surely deterred.

  In addition, in this way, the control channel is steadily and surely suppressed by one jamming radio wave, and the communication channel of the mobile phone is broadly inhibited by other jamming radio waves, so that the communication function of the mobile phone is extremely stable. A deterrent effect can be obtained.

  According to a second aspect of the present invention, in the cellular phone communication suppression system according to the first aspect, the configuration of the control channel suppression circuit and the communication channel suppression circuit has the following characteristics. That is, the control channel suppression circuit and the speech channel suppression circuit include a frequency setting circuit that sets a frequency to be oscillated and a frequency oscillation circuit that oscillates a high-frequency signal having the frequency. Further, at least the speech channel suppression circuit has a modulation oscillation circuit that oscillates a modulation signal for shifting the frequency of the high-frequency signal at a predetermined period and depth.

  The ninth aspect of the invention is based on the aspect of the second aspect of the invention from the viewpoint of the channel deterrence circuit. That is, the invention of claim 9 is a mobile phone communication suppression system for blocking the communication function of a mobile phone by interfering with radio waves of a control channel and a plurality of call channels transmitted from a base station of the mobile phone system to a mobile station. A channel suppression circuit used therein is configured to include the frequency setting circuit, the frequency oscillation circuit, and the modulation oscillation circuit according to claim 2.

  According to the invention as described above, the high frequency signal oscillated from the frequency oscillation circuit is modulated by using the modulation signal for shifting the frequency of the high frequency signal at a predetermined period and depth, and a desired bandwidth is obtained. Can be secured.

  According to a third aspect of the present invention, in the cellular phone communication suppression system according to the second aspect, the frequency setting circuit is set with a PLL controller that sets the frequency based on phase comparison by a phase-locked loop (PLL) technique. A loop filter that outputs a control voltage corresponding to the frequency is provided, and the frequency oscillation circuit includes a voltage controlled oscillator that oscillates a high-frequency signal having a frequency corresponding to the control voltage.

  The invention of claim 10 grasps the invention of claim 3 from the viewpoint of the channel suppression circuit. That is, according to a tenth aspect of the present invention, in the channel suppression circuit according to the ninth aspect, the frequency setting circuit and the frequency oscillation circuit have the configuration according to the third aspect.

  According to the invention as described above, a high-frequency signal having a desired frequency can be output with high accuracy and stability by a combination of the PLL technology and the frequency oscillation circuit.

  According to a fourth aspect of the present invention, there is provided a mobile phone communication suppression system according to any one of the first to third aspects, wherein the speech channel suppression circuit covers a frequency of 6 channels with a single circuit. It is configured to transmit radio waves.

  According to the present invention, the call channel suppression circuit can cover a plurality of call channels normally provided in 6 channels in each communication area of the mobile phone system with a single circuit, so that the call for the control channel can be used. All the channels in one communication area can be covered with only two channel suppression circuits for the channel. Therefore, the system can be configured more simply and inexpensively.

  According to a fifth aspect of the present invention, in the mobile phone communication suppression system according to any one of the first to third aspects, the communication channel suppression circuit includes three channels each of two channels out of six channel frequencies. Each of the jamming radio waves having a bandwidth covering the frequency is transmitted, or each of the jamming radio waves having a bandwidth covering the frequency of two channels is transmitted by three circuits.

  According to the present invention, the call channel deterrence circuit can cover a plurality of call channels normally provided in 6 channels in each communication area of the mobile phone system in an arbitrarily divided manner, thereby enabling a flexible system configuration. Become.

  According to a sixth aspect of the present invention, in the mobile phone communication suppression system according to any one of the first to fifth aspects, the control channel suppression circuit generates an interference radio wave having the same frequency as the control channel in a plurality of areas. The communication channel suppression circuit is configured to transmit, for each of the plurality of regions, a circuit for each region that transmits jamming radio waves having a bandwidth that covers the frequencies of the plurality of communication channels in each region. It is characterized by being.

  According to the present invention, a system capable of covering a plurality of regions can be configured simply and inexpensively by using a control channel suppression circuit common to a plurality of regions and a communication channel suppression circuit for each region. .

  As described above, according to the present invention, a control channel jamming radio wave and a bandwidth jamming radio wave covering a plurality of communication channels are transmitted by different circuits, so that a desired system configuration can be achieved with a simple and inexpensive system configuration. It is possible to provide a mobile phone communication suppression system, a control method, a control program, and a channel suppression circuit capable of obtaining a desired suppression effect by the interference wave of the transmission output.

  Hereinafter, the best mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described with reference to the drawings.

[1. First Embodiment]
[1-1. Constitution〕
FIG. 1 is a system configuration diagram showing a mobile phone communication suppression system according to a first embodiment to which the present invention is applied.

  As shown in FIG. 1, the cellular phone communication suppression system according to the present embodiment transmits a transmission unit Ta and its control unit 300a for transmitting jamming radio waves for a control channel, and jamming radio waves for a plurality of call channels. It consists of a transmission unit Tb and its control unit 300b. Each of the transmission units Ta and Tb includes high-frequency circuits 100a and 100b and antennas 200a and 200b. In general, since there are many cases where there are 6 communication channels in each communication area of the mobile phone system, the transmitter Tb is shown for 6 channels in the figure.

  FIG. 2 is a diagram showing the frequency of jamming radio waves transmitted by the transmission units Ta and Tb of the mobile phone communication suppression system of FIG. As shown in FIG. 2, the control channel transmission unit Ta transmits an interference radio wave having the same frequency as that of the control channel Ca. Further, the call channel transmitting unit Tb transmits jamming radio waves having a bandwidth including a plurality of frequencies identical to those of the 6-channel call channels Cb1 to Cb6.

  In addition, the transmission units Ta and Tb and the control units 300a and 300b of the mobile phone communication suppression system can be basically configured in the same manner only by changing the frequency control content. FIG. 3 is a diagram illustrating a configuration example common to each of the transmission units Ta and Tb and the control units 300a and 300b for the control channel and the communication channel.

  As shown in FIG. 3, the high-frequency circuit 100 of the transmission unit T first includes a PLL controller 1 that sets a transmission frequency based on phase comparison by a phase-locked loop (PLL) technique, and a control voltage corresponding to the set transmission frequency. Is provided, and a VCO (voltage controlled oscillator) 3 that oscillates a high-frequency signal having a frequency corresponding to the control voltage. The high-frequency circuit 100 also includes a high-frequency amplifier 4 that amplifies a high-frequency signal to a sufficient transmission power and a high-frequency low-pass filter 5 that prevents unnecessary radiation from being transmitted.

  The high-frequency circuit 100 of the transmission unit T further includes a modulation oscillation circuit 10 that oscillates a modulation signal for shifting the frequency of the high-frequency signal from the VCO 3 at a predetermined period and depth, and the modulation oscillation circuit 10 A signal adder 11 is provided for adding the output signal to the output signal of the loop filter 2 and inputting it to the VCO 3.

  On the other hand, the control unit 300 includes a control CPU 30 for instructing the PLL controller 1 to change a transmission frequency, control of transmission power, and communication with an external device, and a control program 31 for operating the control CPU 30. It is configured. Then, by making the control contents of the control program 31 different for the control channel and for the call channel, the transmission units Ta and Tb transmit jamming radio waves having different frequencies.

[1-2. Operation)
The mobile phone communication suppression system of the present embodiment having the above configuration operates as follows.

  First, by controlling the PLL controller 1 using the control CPU 30 and the control program 31 of the control units 300a and 300b, the desired frequency band used in the downlink direction from the base station of the mobile phone system to the mobile station is selected. A high frequency signal having a frequency of 1 is output from the VCO 3. In this case, since the PLL controller 1, the loop filter 2, and the VCO 3 are used, a high-frequency signal having a desired frequency can be output from the VCO 3 with high accuracy and stability.

Further, only the PLL controller 1, the loop filter 2, and the VCO 3 can output only an unmodulated single-frequency signal, but the signal is further modulated to the output signal of the VCO 3 using the modulation oscillation circuit 10 and the signal adder 11. By applying, a desired bandwidth can be ensured. In this case, the control CPU 30 and the control program 31 control the on / off of the modulation oscillation circuit 10 and the modulation frequency.

  Therefore, the transmission unit Ta can transmit the jamming radio wave having the same frequency as that of the control channel Ca with high accuracy and stability, and the transmission unit Tb can have a plurality of frequencies identical to those of the 6-channel communication channels Cb1 to Cb6. Can be transmitted with high accuracy and stability.

[1-3. effect〕
According to the mobile phone communication suppression system of the present embodiment as described above, the following effects can be obtained.

  First, by using only the two transmission units Ta and Tb, it is possible to constantly transmit jamming radio waves to a control channel in a target communication area, and to make a wide area for a plurality of call channels in the communication area. Therefore, the system can be configured in a simpler and cheaper manner than the method using a large number of transmission units for each channel as shown in FIG.

  In addition, according to the present embodiment, the control channel can be constantly and surely suppressed by one jamming radio wave, and the communication channel can be widely inhibited by another jamming radio wave, as shown in FIG. Compared with a method of transmitting jamming radio waves in a frequency band including all channels, an extremely stable deterrent effect can be obtained for the communication function of the mobile phone in the target communication area.

[2. Second Embodiment]
FIG. 4 is a system configuration diagram showing a cellular phone communication suppression system according to a second embodiment to which the present invention is applied. As shown in FIG. 4, the mobile phone communication suppression system according to this embodiment is configured to transmit in place of the individual control units 300a and 300b provided for each of the transmission units Ta and Tb in the configuration of the first embodiment. A common control unit 300 is provided for the units Ta and Tb.

  In the first embodiment, the configurations of the transmission units Ta and Tb are the same. However, since there is no need to secure a bandwidth for the transmission unit Ta for the control channel, the modulation oscillation circuit 10 and the signal The adder 11 can be omitted. FIG. 5 is a diagram illustrating a configuration example of the transmission units Ta and Tb and the control unit 300 when the configuration of the transmission unit Ta is simplified using the common control unit 300 as described above.

  FIG. 6 is a flowchart showing the operation of the control unit 300 in the mobile phone communication suppression system of the present embodiment having the above-described configuration. As shown in FIG. 6, when the channel suppression of the mobile phone is necessary (YES in S301), the control unit 300 is the same as the control channel for the control channel transmission unit Ta as the control channel suppression process. (S302), and as a call channel suppression process, a plurality of (here, 6 channels) same frequencies as the call channels are transmitted to the call channel transmission unit Tb. An interfering radio wave transmission command with a bandwidth including is given (S303).

  As a result, similar to the first embodiment, the transmission unit Ta can transmit an interference wave having the same frequency as that of the control channel Ca with high accuracy and stability, and the transmission unit Tb can transmit a 6-channel call. Interference radio waves having a bandwidth including a plurality of frequencies identical to those of the channels Cb1 to Cb6 can be transmitted with high accuracy and stability.

  According to the mobile phone communication suppression system of the present embodiment as described above, in addition to obtaining the same effect as that of the first embodiment, it is possible to obtain an effect that the system can be configured more simply and inexpensively. .

[3. Third Embodiment]
FIG. 7 is a system configuration diagram showing a mobile phone communication suppression system according to a third embodiment to which the present invention is applied. As shown in FIG. 7, the mobile phone communication suppression system according to the present embodiment covers each of the three channels in the configuration of the second embodiment, instead of the transmission unit Tb for the communication channel that covers the six channels. Two transmitters Tb1 and Tb2 are provided.

  FIG. 8 is a diagram showing the frequency of jamming radio waves transmitted by the transmitters Ta, Tb1, Tb2 of the mobile phone communication suppression system of FIG. As shown in FIG. 8, the first transmission unit Tb1 for the communication channel transmits jamming waves having a bandwidth including a plurality of frequencies identical to those of the three channels of the communication channels Cb1 to Cb3. The second transmission unit Tb2 transmits jamming radio waves having a bandwidth including a plurality of frequencies that are the same as those of the three-channel communication channels Cb4 to Cb6.

  As a modification of the present embodiment, three transmission units Tb1 to Tb3 for the communication channel may be provided to transmit the jamming waves having a bandwidth including the two communication channels.

  According to the mobile phone communication suppression system of the present embodiment and its modification as described above, in addition to obtaining the same effects as those of the first and second embodiments, each communication region of the mobile phone system is further improved. In FIG. 4, since a plurality of call channels, which are normally provided by 6 channels, can be divided and covered, an effect that a flexible system configuration is possible can be obtained.

[4. Fourth Embodiment]
FIG. 9 is a system configuration diagram showing a mobile phone communication suppression system according to the fourth embodiment to which the present invention is applied. As shown in FIG. 9, in the configuration of the second embodiment, the mobile phone communication suppression system according to the present embodiment has a control channel transmission unit Ta common to a plurality of regions for a plurality of communication regions. In addition, transmission units Tb1 to TbN for communication channels for each region are provided. Here, from the viewpoint of simplification, it is assumed that there are 6 call channels in all regions.

  FIG. 10 is a diagram showing the frequency of jamming radio waves transmitted by the transmission units Ta and Tb1 to TbN of the mobile phone communication suppression system of FIG. As shown in FIG. 10, the transmission unit Tb1 for the call channel in the A1 area transmits jamming waves having a bandwidth including the same frequency as the six channels of the call channels Cb1 to Cb6 in the A1 area. The transmission unit TbN for the communication channel in the region transmits the jamming radio wave having a bandwidth including the same frequency as the six channels of the communication channels Cbn-5 to Cbn in the AN region. As described above, when there are 6 channels in all regions, n = 6N.

  As a modification of the present embodiment, a transmission unit for each region's call channel includes a plurality of three-channel or two-channel call channels that cover each of the two channels as in the third embodiment or its modification. You may comprise from a transmission part.

  According to the mobile phone communication suppression system of the present embodiment and its modification as described above, the same effects as those of the first and second embodiments can be obtained, and further, control common to a plurality of regions can be obtained. By using the transmission unit Ta for the channel and the transmission units Tb1 to TbN for the communication channels for each region, it is possible to easily and inexpensively configure a system that can cover a plurality of regions. It is done.

[5. Other embodiments]
The present invention is not limited to the above-described embodiments, and various other modifications can be implemented within the scope of the present invention. For example, in the embodiment, a PLL controller, a loop filter, and a VCO are used as the frequency setting circuit and the frequency oscillation circuit. However, specific configurations of the frequency setting circuit and the frequency oscillation circuit can be changed as appropriate. However, since a high-frequency signal having a desired frequency can be output with high accuracy and stability with a simple configuration, it is generally desirable to use a PLL controller, a loop filter, and a VCO.

  In the above embodiment, the case where the number of call channels in each communication area of the mobile phone system is six channels has been described. However, the present invention is also applicable to cases where the number of call channels is different. Similarly, excellent effects can be obtained.

1 is a system configuration diagram showing a mobile phone communication suppression system according to a first embodiment to which the present invention is applied. The figure which shows the frequency of the jamming electromagnetic wave transmitted by each transmission part shown in FIG. 1, and the control / call channel used as the object. The figure which shows the example of a structure common to each transmission part and each control part which are shown in FIG. The system block diagram which shows the mobile telephone communication suppression system which concerns on 2nd Embodiment to which this invention is applied. The figure which shows the structural example of the transmission part and control part which are shown in FIG. 5 is a flowchart showing the operation of the control unit shown in FIG. The system block diagram which shows the mobile telephone communication suppression system which concerns on 3rd Embodiment to which this invention is applied. The figure which shows the frequency of the jamming electric wave transmitted by each transmission part shown in FIG. 7, and the control / call channel used as the object. The system block diagram which shows the mobile telephone communication suppression system which concerns on 4th Embodiment to which this invention is applied. The figure which shows the frequency of the jamming electromagnetic wave transmitted by each transmission part shown in FIG. 9, and the control / call channel used as the object. The figure which shows one system of the conventional mobile telephone communication suppression system. The figure which shows another system of the conventional mobile telephone communication suppression system.

Explanation of symbols

Ta, Tb, Tb1 to TbN ... Transmitter Ca ... Control channels Cb1 to Cbn ... Communication channels 100, 100a, 100b, 100b1 to 100bN ... High frequency circuit 1 ... PLL controller 2 ... Loop filter 3 ... VCO
4 ... High-frequency amplifier 5 ... High-frequency low-pass filter 10 ... Oscillating oscillation circuit 11 ... Signal adders 200, 200a, 200b, 200b1 to 200bN ... Antennas 300, 300a, 300b ... Control unit 30 ... Control CPU
31 ... Control program

Claims (10)

In a mobile phone communication suppression system that suppresses the communication function of a mobile phone by interfering with radio waves of a control channel and a plurality of call channels transmitted from a base station of the mobile phone system to a mobile station,
A control channel suppression circuit for transmitting jamming radio waves having the same frequency as the control channel;
A cellular phone communication suppression system comprising a communication channel suppression circuit for transmitting jamming radio waves having a bandwidth including a plurality of frequencies identical to the plurality of communication channels. The control channel suppression circuit and the speech channel suppression circuit are:
A frequency setting circuit for setting a frequency to oscillate;
A frequency oscillation circuit for oscillating a high-frequency signal of the frequency;
At least the communication channel suppression circuit
The cellular phone communication suppression system according to claim 1, further comprising a modulation oscillation circuit that oscillates a modulation signal for shifting the frequency of the high-frequency signal at a predetermined period and depth. The frequency setting circuit includes a PLL controller that sets the frequency based on phase comparison by a phase-locked loop (PLL) technique, and a loop filter that outputs a control voltage according to the set frequency.
3. The cellular phone communication suppression system according to claim 2, wherein the frequency oscillation circuit includes a voltage controlled oscillator that oscillates a high-frequency signal having a frequency corresponding to the control voltage. 4. The communication channel suppression circuit according to claim 1, wherein the communication channel suppression circuit is configured to transmit a jamming wave having a bandwidth covering a frequency of 6 channels by a single circuit. The mobile phone communication suppression system described. The speech channel deterrent circuit transmits a jamming signal having a bandwidth that covers three channels of two channels out of six channel frequencies, or covers two channels of frequency using three circuits. 4. The mobile phone communication suppression system according to claim 1, wherein the mobile phone communication suppression system is configured to transmit each jamming radio wave having a bandwidth to be transmitted. 5. The control channel suppression circuit is configured to transmit jamming radio waves having the same frequency as the control channel in a plurality of regions,
The call channel deterrence circuit is configured by a circuit for each region that transmits, for each of the plurality of regions, jamming radio waves having a bandwidth that covers the frequencies of the plurality of call channels in each region. The mobile phone communication suppression system according to any one of claims 1 to 5. In a mobile phone communication suppression control method for blocking a mobile phone communication function by interfering with radio waves of a control channel and a plurality of call channels transmitted from a base station of a mobile phone system to a mobile station,
A control channel suppression step of transmitting jamming radio waves having the same frequency as the control channel by a control channel suppression circuit;
A cellular telephone communication inhibition control method, comprising: a communication channel inhibition step of transmitting jamming radio waves having a bandwidth including a plurality of frequencies identical to the plurality of speech channels by a speech channel inhibition circuit. In a mobile phone communication suppression control program for blocking the communication function of a mobile phone by interfering with radio waves of a control channel and a plurality of call channels transmitted from a base station of a mobile phone system to a mobile station,
A control channel suppression step of transmitting jamming radio waves having the same frequency as the control channel by a control channel suppression circuit;
A mobile phone communication suppression control program, wherein a communication channel suppression step for transmitting jamming radio waves having a bandwidth including a plurality of frequencies identical to the plurality of communication channels is realized by a computer by a communication channel suppression circuit. In a channel deterrence circuit used in a cell phone communication deterrence system that deters the communication function of a cell phone by interfering with the radio waves of a control channel and a plurality of call channels transmitted from the base station of the cell phone system to the mobile station ,
A frequency setting circuit for setting a frequency to oscillate;
A frequency oscillation circuit for oscillating a high-frequency signal of the frequency;
A channel suppression circuit comprising a modulation oscillation circuit for oscillating a modulation signal for shifting the frequency of the high-frequency signal at a predetermined period and depth. The frequency setting circuit includes a PLL controller that sets the frequency based on phase comparison by a phase-locked loop (PLL) technique, and a loop filter that outputs a control voltage according to the set frequency.
The channel suppression circuit according to claim 9, wherein the frequency oscillation circuit includes a voltage-controlled oscillator that oscillates a high-frequency signal having a frequency corresponding to the control voltage.

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