KR20110079981A - The transmitting and receiving system which has squelch noise removal function and the method - Google Patents

Abstract

PURPOSE: A transmission and reception apparatus that has squelch noise removal function and method thereof are provided to solve a received problem when a front part of communication content is cut. CONSTITUTION: A CPU outputs a demodulation signal(22) in case of a sub tone signal of channel frequency the same as a reception signal. The CPU decides continuance or not by confirming the same the sub tone signal as the demodulation signal during short time(23). The CPU secludes a receiving voice by making the control signal of receiving voice when non-identical sub tone data is detected(24). The CPU outputs the demodulation signal by making the control signal of receiving voice when identical sub tone data is detected(25).

Description

The transmitting and receiving system which has squelch noise removal function and the method

The present invention relates to a transmission and reception device having a squelch noise removal function of a wireless communication device and a method thereof, and more particularly to a continuous tone controlled switched system (CTCSS) or a DCS Sending a Tone Squelch signal from the Digital Communications System (DAC) requires a delay time while the CPU (Central Processing Unit) detects the signal, and then removes the signal to enable communication. Its purpose is to provide a recording medium that can be read by a Central Processing Unit that has recorded a program for the purpose of reading the program.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device (radio), and more particularly, to a transmitting / receiving device having a squelch noise removing function and a central processing unit recording a program for realizing the method. A recording medium.

At present, the rapid development of the technology, the digital communication of the voice to the digital communication is the era of digital communication, but many communication devices are still used in the analog method.

Among these analog methods, wireless communication devices using frequency modulation are trying to prevent interference between wireless communication devices by using a sub tone in addition to a specific frequency channel allocated due to a limited frequency of a country.

For example, 38 frequencies of Continuous Tone Controlled Squelch System (CTCSS) and 83 Digital Tone (Digital Communications System) frequency tones are used to communicate with each other to prevent interference. There is a lot of problems that are received in the state.

For example, if the user sends the message "Order 5 bottles of beer to table 5" immediately after pressing the send button, only the message "Order 5 bottles of beer to the table" will be delivered to the receiving party. There is a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and when the wireless communication device transmitting side sends a tone squelch signal of a continuous tone controlled switched system (CTCSS) or a digital communications system (DCS), the signal is once removed to communicate. It is an object of the present invention to provide a recording medium that can be read by a central processing unit in which a method for enabling this and a program for realizing the same are recorded.

According to the present invention, when a transmitting side transmits a tone squelch signal of a continuous tone controlled squelch system (CTCSS) or a digital communications system (DCS), a delay time is delayed while the central processing unit (CPU) detects the signal. This is necessary to determine whether the communication is continued by removing the signal once to enable communication and verifying the signal for a short time.

As described above, according to the present invention, in addition to a specific frequency channel allocated due to a limited frequency of a country, 38 frequencies of Sub Tone, that is, 38 Frequency Tone Controlled Squelch System (CTCSS) and 83 Frequency Tones (Digital Communications System) of DCS Tone) is used to communicate, and in this case, the problem that the front part of the communication content is received in a partly broken state can be solved, thereby greatly increasing the convenience of use of the wireless communication device receiver.

1 is a block diagram of an embodiment of a receiving apparatus having a squelch noise cancellation function.
FIG. 2 is a flow diagram of an embodiment of a reception control method for removing squelch noise. FIG.

The present invention will now be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a receiving apparatus having a squelch noise removing function according to the present invention.

A receiving device having a squelch noise removing function according to the present invention includes a receiving unit (demodulation unit) 12 and a central processing unit (Central Processing Unit) for demodulating a signal received through the receiving antenna 11 ( 16 receives the voice signal received through the receive switch 13 and the receive switch 13 for transmitting or blocking the demodulation output from the demodulator 12 to the amplifier 14 in accordance with the sound signal control data signal from 16). Amplification unit 14 for amplifying, a speaker or earphone 15 for outputting a signal amplified by the amplifying unit, and a signal demodulated by the demodulation unit 12 are analyzed to obtain the same sub tone data. When detected, a signal for removing squelch noise is sent to the reception switch 13 to output a demodulated signal to enable reception, and then the signal is checked for a short time to determine whether the communication is continued. It has a central processing unit (CPU) for.

Next, the operation of the receiving device having a squelch noise removal function according to the present invention will be described in detail with reference to FIG. 2.

FIG. 2 is a flowchart illustrating a reception control method for removing squelch noise according to the present invention, wherein the squelch noise is removed from a receiving apparatus for a short time after receiving the squelch noise. A method of determining whether or not communication continues by checking the signal is shown.

First, the received signal, which is induced by the receiving antenna 11 and demodulated by the demodulator 12, is analyzed by the central processing unit 16 to determine whether it is a sub tone signal of the same channel frequency. After the determination, if it is the same, the demodulation signal is output 22, and it is determined whether the communication is continued through the step of checking whether the demodulation signal is a matching sub tone signal for a short time (23). .

As a result of the determination, when unequal sub-tone data is detected, the central processing unit 16 generates a sound signal control signal to the receive switch 13 to block the sound signal (24). When the same sub tone data is detected, the central processing unit 16 generates a sign tone control signal to the receive switch 13 to output a demodulated signal to enable reception (25). .

11: receiving antenna 12: receiving part (demodulation part) 13: receiving part
14: amplifier 15: receiver 16: central processing unit
21: Analyze and block received signals 22: Output demodulated signals 23: Determine received data
24: Block demodulation signal 25: Continue output demodulation signal.

Claims (1)

In the reception control method applied to a receiving device having a squelch noise (Squelch Noise) removal function,
A first step of determining whether a sub tone signal of the same channel frequency is the same and then outputting the demodulated signal once it is the same;
A second step of determining whether the communication is continued by checking whether the demodulation signal is a matching sub tone signal for a short time;
A third step of generating a sign tone control signal to block a sign tone when unequal sub tone data is detected as a result of the second step;
As a result of the determination of the second step, when the same sub tone data is detected, a computer program having a program for realizing the fourth step of generating a sound signal control signal and outputting a demodulation signal to enable reception can be read by a computer. Recording media.

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