KR101516733B1 - Apparatus and method for removing noise of analog radio - Google Patents

Apparatus and method for removing noise of analog radio Download PDF

Info

Publication number
KR101516733B1
KR101516733B1 KR1020140079567A KR20140079567A KR101516733B1 KR 101516733 B1 KR101516733 B1 KR 101516733B1 KR 1020140079567 A KR1020140079567 A KR 1020140079567A KR 20140079567 A KR20140079567 A KR 20140079567A KR 101516733 B1 KR101516733 B1 KR 101516733B1
Authority
KR
South Korea
Prior art keywords
signal
analog
digital
input signal
noise
Prior art date
Application number
KR1020140079567A
Other languages
Korean (ko)
Inventor
손영호
조영준
박철용
양태욱
임정석
박중길
Original Assignee
한국전자통신연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Priority to KR1020140079567A priority Critical patent/KR101516733B1/en
Application granted granted Critical
Publication of KR101516733B1 publication Critical patent/KR101516733B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

The present invention relates to an apparatus and a method for removing modem signals transmitted from a digital radio transceiver that are received on an analog radio transceiver during digital wireless communication in the same frequency band where both digital and analog radio transceivers are operated. The apparatus for removing noise of an analog radio transceiver, where both digital and analog radio transceivers are operated, comprises: a step of receiving an input signal from a voice connector of the analog radio transceiver; a step of determining whether the input signal contains a modem signal transmitted from the digital radio transceiver; and a step of removing the input signal if the input signal contains the modem signal.

Description

[0001] APPARATUS AND METHOD FOR REMOVING NOISE OF ANALOG RADIO [0002]

The present invention relates to a noise cancellation apparatus and method for an analog radio, and more particularly, to a digital radio apparatus and a method thereof for receiving and listening to an analog radio in a digital radio communication in an environment in which an analog radio and a digital radio are operated in the same frequency band. The present invention relates to an apparatus and a method for removing a modem signal transmitted from a modem.

A radio is widely used in an operating environment where command and control are required, such as in the military or industry, due to the ability to make direct calls between terminals without having a separate system such as a base station for a call and to enable one to multi-party calls.

For example, Korean Patent Publication No. 2011-0032132, "Device for improving the quality of an analog radio," has developed around an analog radio technology. However, with the development of communication technology today, a digital radio is being developed and operated. In some environments such as the military, there are cases where an analog radio and a digital radio are operated together in the same band.

Typically, newly developed digital radios will support both analog radio and digital modes for compatibility with existing analog radios.

Therefore, there is no problem when the analog radio and the digital radio communicate in analog mode. However, in a digital mode communication between digital radio units, a conventional analog radio unit can not normally recover the signal transmitted from the digital radio unit, so that the user can listen to a noise sound unique to the digitally modulated signal. At this time, the reception sound that is heard by the user causes inconvenience to the user, that is, the analog radio operator.

Therefore, there is a need for a method for detecting and removing a digital radio transmission signal received by an analog radio when analog radio and digital radio are used in combination in the same frequency band.

It is an object of the present invention to provide an apparatus and method for removing a modem signal transmitted from a digital radiotelephone received and listened to by an analog radio during a digital radiocommunication period in an environment in which an analog radio and a digital radio are operated in the same frequency band .

According to an aspect of the present invention, there is provided a noise elimination method for an analog radio,

Receiving an input signal from a voice connector of an analog transceiver in an environment in which an analog transceiver and a digital transceiver are operated in a mixed manner; Determining whether a modem signal transmitted from the digital radiotelephone is present in the input signal; And removing the input signal if a modem signal is present in the input signal.

In this case, the step of removing the input signal may further include removing the input signal and outputting the previously stored background noise to the user through the transmitter set or the speaker.

The method may further include outputting the input signal when the modem signal is not present in the input signal.

In this case, when the signal is transmitted through the analog transceiver, the signal input through the microphone is directly output through the signal line corresponding to the voice connector of the analog transceiver.

In this case, when the signal is transmitted through the analog transceiver, the method further includes the step of outputting the PTT signal through the PTT signal line located in the voice connector of the analog transceiver.

In addition, according to an embodiment of the present invention,

An analog-digital converter for converting an input signal input from a voice connector of the analog radio to digital data; A noise eliminator for analyzing the digital data to determine whether a modem signal transmitted from the digital transceiver exists in the input signal and to remove the input signal when the modem signal is present in the input signal; And a digital-analog converter for converting an output value of the noise removing unit into analog data and outputting the analog data.

In this case, the noise eliminator removes the input signal when a modem signal is present in the input signal, and outputs the previously stored background noise to the digital-analog converter.

In this case, the noise removing unit may output the input signal when the modem signal is not present in the input signal.

In this case, the digital-analog converter outputs the converted analog signal to a user through a transmitter or a speaker.

In this case, when a signal is transmitted through the analog transceiver, a signal inputted through a microphone is directly output through a signal line corresponding to a voice connector of the analog transceiver.

In this case, when the signal is transmitted through the analog transceiver, the PTT signal is directly output through the PTT signal line located in the voice connector of the analog transceiver.

According to the present invention, a noise cancellation apparatus and method for an analog radio are capable of receiving an analog radio user through a speaker or a handset during a digital radio communication in an environment in which an analog radio and a digital radio are operated in the same frequency band. The analog modulated signal is detected and removed, and the background noise is output, thereby improving the operability of the analog radio of a conventional analog radio user.

1 is a diagram illustrating an environment in which a noise canceller for an analog radio is applied according to an embodiment of the present invention.
2 is a block diagram showing the configuration of a digital radio for digitally processing voice communication.
3 is a block diagram showing the configuration of an analog radio for processing voice communication in an analog manner.
4 is a view showing the outline of a noise canceller for an analog radio system according to an embodiment of the present invention.
5 is a diagram schematically showing a detailed configuration of a noise canceller for an analog radio system according to an embodiment of the present invention.
6 is a flowchart illustrating a method for removing noise for an analog radio according to an embodiment of the present invention.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a noise canceling apparatus and method for an analog radio system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an environment in which a noise canceller for an analog radio is applied according to an embodiment of the present invention.

First, the noise canceller for an analog radio system according to an embodiment of the present invention is applied to an environment in which an analog radio and a digital radio are mixed and operated in the same frequency band.

Referring to FIG. 1, each of the plurality of digital radios 100a, 100b, and 100c supports an analog mode capable of communicating with the analog radio 200 in addition to a digital mode of digital communication.

When communication is performed in the analog mode, each of the plurality of digital radios 100a, 100b, and 100c and the analog radio 200 can communicate with each other.

However, in the case of communication in the digital mode, mutual communication is possible between a plurality of digital radios 100a, 100b and 100c, but in the analog radio 200, a signal transmitted from a specific digital radio is subjected to analog modulation processing, The user can hear the noise due to the digitally modulated signal.

That is, in the environment where the analog radio and the digital radio are mixedly operated in the same frequency band, the noise cancellation device for the analog radio according to the embodiment of the present invention transmits a signal to the analog transceiver side operator through a speaker or a handset Detects and removes audible noise, and outputs background noise, thereby improving the operability of an analog radio user of a conventional analog radio user.

Next, the configuration of a digital radio for digitally processing voice communication will be described in detail with reference to FIG.

2 is a block diagram showing the configuration of a digital radio for digitally processing voice communication.

Referring to FIG. 2, a digital radio for digitally processing voice communication may correspond to a digital AM radio, but is not limited thereto.

The digital transceiver includes a transmitter 110, an antenna 120, and a receiver 130.

The transmission unit 110 includes an audio input unit 111, an analog-digital converter (ADC) 112, a voice codec encoder 113, a digital modulation unit (PSK) 114, an AM modulation unit 115, a DAC 116, And a channel transmission unit 117. [

The voice input unit 111 receives a voice of the user (hereinafter, also referred to as "user voice" or "voice signal").

The ADC 112 converts the voice signal input from the voice input unit 111 into PCM (Pulse Code Modulation) data for digital processing.

The voice codec encoder 113 compresses the PCM data for efficient channel transmission.

The digital modulation unit (PSK) 114 modulates the PCM data compressed by the voice codec encoder 113 into a digital modulation, for example, a phase shift keying (PSK).

The AM modulator 115 AM-modulates the result modulated by the digital modulator (PSK) 114.

The DAC 116 converts the result of AM modulation by the AM modulation unit 115 into an analog modem signal.

The channel transmitter 117 converts (e.g., amplifies, filters, and the like) the analog modem signal to correspond to the transmission channel, and transmits the signal corresponding to the converted result to the antenna unit 120.

The antenna unit 120 transmits the signal received by the transmission unit 110 to the reception unit 130.

The receiver 130 includes a channel receiver 131, an analog-to-digital converter (ADC) 132, an AM demodulator 133, a digital demodulator (PSK) 134, a voice codec decoder 135, a DAC 136, And an audio output unit 137. [

The channel receiving unit 131 receives a signal through the antenna unit 120, and converts (e.g., amplifies, filters, etc.) the received signal to generate an analog signal.

The ADC 132 converts the analog signal into a digital signal.

The AM demodulation unit 133 AM-demodulates the digital signal to recover the baseband signal.

A digital demodulator (PSK) 134 digitally demodulates the baseband signal to recover the compressed audio data.

The voice codec decoder 135 restores the restored voice data in the compressed state to the PCM signal before the compression state.

The DAC 136 converts the PCM signal to an analog voice signal.

The audio output unit 137 outputs an analog audio signal to the user.

Next, a configuration of an analog radio for processing voice communication in an analog manner will be described in detail with reference to FIG.

3 is a block diagram showing the configuration of an analog radio for processing voice communication in an analog manner.

Referring to FIG. 3, an analog radio for processing voice communication in an analog manner may correspond to an analog AM radio, but is not limited thereto.

The analog transceiver includes a transmitter 210, an antenna 220, and a receiver 230.

The transmission unit 210 includes an audio input unit 211, an AM modulation unit 212, and a channel transmission unit 213.

The voice input unit 211 receives a voice of the user (hereinafter also referred to as "user voice" or "voice signal").

The AM modulator 212 AM-modulates the voice signal input from the voice input unit 211 using a carrier signal in a transmission band.

The channel transmitter 213 converts (for example, amplifies, filters, etc.) the signal AM-modulated by the AM modulator 212 to a corresponding transmission channel, and transmits the signal corresponding to the result of the conversion to the antenna unit 220 .

The antenna unit 220 transmits the signal received by the transmitter 210 to the receiver 230.

The reception unit 230 includes a channel reception unit 231, an AM demodulation unit 232, and a voice output unit 233. [

The channel receiving unit 231 receives a signal through the antenna unit 220, extracts a necessary signal from the received signal, amplifies the signal, and modulates the signal to an intermediate frequency.

The AM demodulation unit 232 AM-demodulates the signal received from the channel reception unit 231 and restores the signal into a voice signal.

The voice output unit 233 amplifies the voice signal and outputs it to the user.

Next, the external shape and detailed configuration of the noise canceller for analog radio will be described in detail with reference to FIG. 4 and FIG.

4 is a view showing the outline of a noise canceller for an analog radio system according to an embodiment of the present invention. 5 is a diagram schematically showing a detailed configuration of a noise canceller for an analog radio system according to an embodiment of the present invention.

Referring to FIG. 4, the noise canceller 300 for an analog radio system includes a main body 310 for removing noise from an input signal, a first connector 320 for connecting the main body 310 and the voice connector of the analog radio, And a second connection part 330 for connecting the main body 310 with the connectors of the transmitter and receiver or the speaker.

5, the main body 310 of the noise canceller 300 for an analog radio system includes an analog-to-digital converter (ADC) 311, a noise eliminator 312, And a digital-analog converter (hereinafter also referred to as "DAC (digital-analog converter) ") 313.

The analog-to-digital converter (ADC) 311 converts the input signal input from the first connection unit 320, which connects the audio connector of the analog transceiver, into digital data.

The noise removing unit 312 analyzes the digital data and removes the input signal when the modem signal transmitted from the digital transceiver is present in the input signal, and outputs a comfort noise. Also, the noise removing unit 312 analyzes the digital data and outputs digital data when there is no noise in the input signal.

The digital-analog converter (DAC) 313 converts background noise or digital data received from the noise removing unit 312 into analog data (= final signal) and outputs the analog data.

The main body 310 of the analog radio RF noise canceller 300 can directly transmit a signal (for example, a microphone input signal) input from the second connection unit 330 connecting the transmitter / receiver set or the speaker connector to the first connection unit 320). At this time, a PTT (Push To Talk) signal for half-duplex communication of the analog transceiver is present in the voice connector of the analog transceiver through the second connection unit 330, the main body 310 and the first connection unit 320 To the PTT signal line.

Next, a method of removing noise for an analog radio will be described in detail with reference to FIG.

6 is a flowchart illustrating a method for removing noise for an analog radio according to an embodiment of the present invention.

First, the noise canceller 300 for an analog radio is connected to a voice connector of an analog radio and a connector of a transmitter or a speaker, but is not limited thereto.

Referring to FIG. 6, the noise canceller 300 for an analog radio receives an input signal through a voice connector of an analog radio (S610). At this time, the noise eliminating device 300 for analog radio transceives the received input signal into digital data.

In step S620, the noise eliminator 300 for analog radios determines whether noise is present in the input signal received in step S610, that is, a modem signal transmitted from the digital radio.

If there is a modem signal in the input signal received in step S610, the noise eliminator 300 for analog radio eliminates the input signal (S630). Next, in step S640, the noise eliminator 300 for analog radio eliminates the input signal as in step S630, and outputs the comfort noise to the user via the transmitter set or the speaker instead. Here, the background noise is stored in the noise canceller 300 for the analog radio.

If the modem signal is not present in the input signal received in step S610, the noise eliminator 300 for analog radio transmits the input signal to the user (S650). At this time, the noise eliminating apparatus 300 for analog radio transceivers converts the input signal converted into digital data into analog data (= final signal) and outputs it.

As described above, according to the present invention, in an environment in which an analog radio and a digital radio are mixedly operated in the same frequency band, a noise signal unique to a digitally modulated signal heard through a speaker or a handset to an analog radio- And outputting the background noise, it is possible to improve the operability of the analog radiotelephone of the existing analog radio user.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100a, 100b and 100c; Multiple digital radios
110; A transmitting unit 111; Voice input unit
112; ADC 113; Voice codec encoder
114; A digital modulation unit (PSK) 115; AM modulation section
116; DAC 117; Channel transmitter
120; An antenna unit 130; Receiver
131; A channel receiving unit 132; ADC
133; AM demodulation section 134; Digital demodulation (PSK)
135; A voice codec decoder 136; DAC
137; Audio output unit
200; An analog radio 210; Transmitter
211; Voice input unit 212; AM modulation section
213; Channel transmitting unit 220; The antenna portion
230; A receiving unit 231; Channel receiver
232; AM demodulation section 233; Audio output unit
300; Noise Canceling Device for Analog Radio
310; A body 320, 330; The first connection portion,
311; An analog-to-digital converter 312; Noise rejection
313; The digital-

Claims (11)

Receiving an input signal from a voice connector of an analog transceiver in an environment in which an analog transceiver and a digital transceiver are operated in a mixed manner;
Determining whether a modem signal transmitted from the digital radiotelephone is present in the input signal; And
Removing the input signal if a modem signal is present in the input signal
And a noise canceling method for an analog radio. The method according to claim 1,
The step of removing the input signal
Further comprising the step of removing said input signal and outputting the previously stored background noise to a user via a transmitter set or speaker. ≪ Desc / Clms Page number 19 > The method according to claim 1,
And outputting the input signal if the modem signal is not present in the input signal. The method according to claim 1,
And outputting a signal input through a microphone through a signal line corresponding to a voice connector of the analog radio unit when the signal is transmitted through the analog radio unit. The method according to claim 1,
And outputting the PTT signal through a PTT signal line located in a voice connector of the analog transceiver when the signal is transmitted through the analog transceiver. An analog-digital converter for converting an input signal input from a voice connector of the analog radio to digital data;
A noise eliminator for analyzing the digital data to determine whether a modem signal transmitted from the digital transceiver exists in the input signal and to remove the input signal when the modem signal is present in the input signal; And
A digital-to-analog conversion unit for converting an output value of the noise removing unit into analog data,
And a noise canceler for an analog radio. The method of claim 6,
The noise removing unit
Wherein the noise elimination unit removes the input signal when the modem signal is present in the input signal and outputs the previously stored background noise to the digital-to-analog converter. The method of claim 6,
The noise removing unit
And outputs the input signal when the modem signal is not present in the input signal. The method of claim 6,
The digital-to-
And outputs the converted analog signal to a user through a transmitter or a speaker. The method of claim 6,
Wherein when the signal is transmitted through the analog transceiver, the signal input through the microphone is directly output through the signal line corresponding to the voice connector of the analog transceiver. The method of claim 6,
Wherein when the signal is transmitted through the analog transceiver, the PTT signal is directly output through the PTT signal line located in the voice connector of the analog transceiver.
KR1020140079567A 2014-06-27 2014-06-27 Apparatus and method for removing noise of analog radio KR101516733B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140079567A KR101516733B1 (en) 2014-06-27 2014-06-27 Apparatus and method for removing noise of analog radio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140079567A KR101516733B1 (en) 2014-06-27 2014-06-27 Apparatus and method for removing noise of analog radio

Publications (1)

Publication Number Publication Date
KR101516733B1 true KR101516733B1 (en) 2015-05-04

Family

ID=53393584

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140079567A KR101516733B1 (en) 2014-06-27 2014-06-27 Apparatus and method for removing noise of analog radio

Country Status (1)

Country Link
KR (1) KR101516733B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000029500A (en) * 1998-07-08 2000-01-28 Denso Corp Noise suppressing apparatus and voice recognizing system using the apparatus
KR20090082959A (en) * 2008-01-29 2009-08-03 주식회사 현대오토넷 Method of displaying speech recognition status for improving speech recognition and the apparatus for displaying speech recognition status using therrof
KR20100021173A (en) * 2008-08-14 2010-02-24 이테크 주식회사 Optimum transceiver
KR20140012496A (en) * 2012-07-20 2014-02-03 실리콘알엔디(주) Co-site cancellation apparatus of push-to-talk terminal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000029500A (en) * 1998-07-08 2000-01-28 Denso Corp Noise suppressing apparatus and voice recognizing system using the apparatus
KR20090082959A (en) * 2008-01-29 2009-08-03 주식회사 현대오토넷 Method of displaying speech recognition status for improving speech recognition and the apparatus for displaying speech recognition status using therrof
KR20100021173A (en) * 2008-08-14 2010-02-24 이테크 주식회사 Optimum transceiver
KR20140012496A (en) * 2012-07-20 2014-02-03 실리콘알엔디(주) Co-site cancellation apparatus of push-to-talk terminal

Similar Documents

Publication Publication Date Title
US6415158B1 (en) Dual mode mobile phone operating as a two-way radio
DK201400756A1 (en) A wireless headset system with two different radio protocols
CN102448149B (en) System and method of duplex wireless audio link over broadcast channels
EP2541882A1 (en) Transmitting radio signals between a headset and a base station
US20070141979A1 (en) Automatic frequency changing modulator
US7725075B2 (en) Control element for simplex HF to VHF/UHF cross-band system with transmission breakthrough
US20030118196A1 (en) Wireless digital audio system
US20080096484A1 (en) Short range wireless communications using FM band communication links and related systems
KR101516733B1 (en) Apparatus and method for removing noise of analog radio
CN111446981A (en) Bluetooth wireless intercom system
KR100394815B1 (en) Multi-channel repeater
US20150120284A1 (en) Apparatus and method for improving communication quality of radio
US20110158438A1 (en) Apparatus and method for audio signal processing in dual standby mobile communication terminal
JP2022014255A (en) Radio communication device and radio communication system
JP4812711B2 (en) Apparatus comprising first and second radio repeaters
JP4805241B2 (en) Wireless repeater
JP7170797B1 (en) Wireless communication system and wireless communication device
KR20020078062A (en) Portable phone with FM audio output transmitter
AU2007203522B2 (en) Control element for simplex HF to VHF/UHF cross-band system with transmission breakthrough
PT1558013E (en) Process and terminals for the emission and the remote reception of signals of audio and/or video- telephony
HUP0004124A2 (en) A radiocommunication system for transmitting and receiving data
KR101403376B1 (en) Apparatus and method for improving performance of voice engineering order wire
JP2023036388A (en) Wireless relay device and wireless communication system
US20090052501A1 (en) Voice communication apparatus
KR200343401Y1 (en) Digital Wireless Hands-free and Digital Wireless Speaker System using Spread Spectrum

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20180406

Year of fee payment: 4