CN108768431A - A kind of co-channel full duplex intercom and its implementation simultaneously - Google Patents
A kind of co-channel full duplex intercom and its implementation simultaneously Download PDFInfo
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- CN108768431A CN108768431A CN201810557272.XA CN201810557272A CN108768431A CN 108768431 A CN108768431 A CN 108768431A CN 201810557272 A CN201810557272 A CN 201810557272A CN 108768431 A CN108768431 A CN 108768431A
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- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
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- 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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
-
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
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Abstract
A kind of co-channel full duplex intercom simultaneously, including digital signal processing unit, transmitting radio frequency link, reception radio frequency link, disturbance reconstruction link, feedback link, local oscillator, circulator and antenna；The transmitting radio frequency link is sequentially connected with circulator, antenna；The transmitting radio frequency link is connected with disturbance reconstruction link；First output end of disturbance reconstruction link is connected with radio frequency link first input end is received；The second input terminal of radio frequency link is received with circulator to be connected；Disturbance reconstruction link second output terminal is connected with feedback link；Digital signal processing unit is connected with transmitting radio frequency link, reception radio frequency link, feedback link respectively by local oscillator；Transmitting radio frequency link, reception radio frequency link are connected with digital signal processing unit respectively with feedback radio frequency link；Co-channel full duplex intercom and its implementation make intercom realize full duplex real-time Communication for Power simultaneously, and intercom application is made more to have practical value.
Description
Technical field
The invention belongs to communication technique fields, more particularly to a kind of co-channel full duplex intercom and its implementation simultaneously.
Background technology
Traditional FM intercoms be the time-division with frequency half-duplex operation mode, that is, after pressing PTT buttons, can converse, pine
Open button can be answered；Traditional intercom can not carry out real-time intercommunication in many application scenarios, single use
Mode makes the application of FM intercoms be very limited, the application be directed to a kind of co-channel full duplex intercom simultaneously and its
Implementation method extends the application range of intercom, it can be achieved that real-time voice call.
Invention content
It is an object of the present invention in view of the above-mentioned problems, propose a kind of co-channel full duplex intercom and its realization side simultaneously
Method.
A kind of co-channel full duplex intercom simultaneously, including digital signal processing unit, transmitting radio frequency link, reception rf chain
Road, disturbance reconstruction link, feedback link, local oscillator, circulator and antenna；The transmitting radio frequency link and circulator, day
Line is sequentially connected；The transmitting radio frequency link is connected with disturbance reconstruction link；First output end of disturbance reconstruction link with connect
Radio frequency link first input end is received to be connected；The second input terminal of the reception radio frequency link is connected with circulator；The disturbance reconstruction
Link second output terminal is connected with feedback link；The digital signal processing unit by local oscillator respectively with transmitting radio frequency
Link, reception radio frequency link, feedback link are connected；The transmitting radio frequency link receives radio frequency link and feedback radio frequency link point
It is not connected with digital signal processing unit；The disturbance reconstruction link is used to handle the transmitting signal of transmitting link output；It is described
Feedback link is used to acquire and handle the transmitting signal of transmitting link output.
Further, the transmitting radio frequency link includes D/A conversion unit, the first mixing unit, the first coupler；Institute
D/A conversion unit, the first mixing unit, the first coupler is stated to be sequentially connected；The D/A conversion unit input terminal is believed with number
Number processing unit output end is connected；The transmitting radio frequency link by the first coupler respectively with circulator, disturbance reconstruction link
It is connected；The first output end of the local oscillator is connected with the first mixing unit.
Further, the reception radio frequency link includes synthesis unit, the second mixing unit, the first AD conversion unit；
The synthesis unit first input end is connected with the circulator；The second input terminal of the synthesis unit and the disturbance reconstruction chain
Road second output terminal is connected；The synthesis unit output end and the second mixing unit, the first AD conversion unit, at digital signal
Reason unit is sequentially connected；The local oscillator second output terminal is connected with the second mixing unit.
Further, the disturbance reconstruction link include the second coupler, power splitter, at least two disturbance reconstruction branches,
Synthesis unit；Second coupler is connected with power splitter；The power splitter output end is connected with disturbance reconstruction branch；It is described
Disturbance reconstruction branch includes the delay line being sequentially connected, attenuator, amplifier, phase shifter；The power splitter output end and delay
Line input terminal is connected；The phase shifter output end is connected with synthesis unit input terminal.
Further, the feedback link includes third mixing unit, the second AD conversion unit；The third mixing is single
First first input end is connected with disturbance reconstruction link second output terminal；Third mixing unit described in input terminal is turned by the second modulus
Unit is changed with digital signal processing unit to be connected；The local oscillator third output end is connected with third mixing unit.
Further, the digital signal processing unit include dsp processor, CTCCS, CDCSS, SELCALL, DTMF,
FSK modulation module, audio processing modules, MCU；The CTCCS, CDCSS, SELCALL, DTMF, FSK modulation module, at audio
Reason module, MCU are connected with dsp processor respectively.
It is a kind of while with the method for frequency intercommunication, it is described while including launching technique and method of reseptance with the method for frequency intercommunication；
The launching technique includes the following steps：
S11：Voice signal is acquired, by digital signal processing unit, carries out baseband digital signal processing；
S12：Transmitting radio frequency link is by the modulated signal after digital processing, after digital-to-analogue conversion, the signal with local oscillator
It is sent out after the first frequency mixer, the signal after mixing is filtered, amplifies, and circulator, day are sent to by the first coupler
Line；
S13：Signal after the first coupler is sent to reception after disturbance reconstruction link exports disturbance reconstruction signal and penetrates
Frequency link, meanwhile, the signal after the first coupler is sent the signal to by the second coupler in disturbance reconstruction link
Feedback link；
S14：It is mixed with the signal of local oscillator after the output signal of feedback link the second coupler of reception, signal
After adjustable amplification digital signal processing unit is sent to after analog-to-digital conversion module is sampled；
The method of reseptance includes the following steps：
S21：Antenna receives external signal, and synthesis unit is sent to by circulator；
S22：Disturbance reconstruction signal is superimposed by synthesis unit with the external signal by antenna, circulator, realizes local transmitting letter
Number counteracting；
S23：Composite signal is filtered, after adjustable enhanced processing, it is mixed by the second frequency mixer with the signal of local oscillator
After frequency, signal sampling is carried out by analog-digital converter and is then output to digital signal processing unit；
S24：Digital signal processing unit carries out Interference Cancellation, demodulation to signaling again, by audio processing modules by audio
Signal is delivered to audio output.
Further, the disturbance reconstruction link is for after coupling firing signal, coupled signal to be divided by power splitter
If main line, after carrying out time delay, adjustable damping, amplification, phase shift processing respectively per road, then exported after synthesizer synthesizes.
The beneficial effects of the present invention are：Make intercom realize full-duplex voice communication, can real-time Communication for Power, make intercom
It is upper more with practical value in application.
Description of the drawings
Fig. 1 is a kind of while the schematic diagram of co-channel full duplex intercom；
Fig. 2 is disturbance reconstruction link schematic diagram.
Specific implementation mode
To keep the purpose, technical scheme and advantage of inventive embodiments clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is this
Invention a part of the embodiment, instead of all the embodiments.Embodiments of the present invention, which are generally described and illustrated herein in the accompanying drawings
Component can arrange and design with a variety of different configurations.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without creative efforts, shall fall within the protection scope of the present invention.
The present embodiment provides a kind of co-channel full duplex intercoms simultaneously, including digital signal processing unit, transmitting rf chain
Road receives radio frequency link, disturbance reconstruction link, feedback link, local oscillator, circulator and antenna.At the digital signal
Reason unit is connected with transmitting radio frequency link, disturbance reconstruction link；The transmitting radio frequency link is connected by circulator with antenna；Institute
The first output end of disturbance reconstruction link is stated with circulator to be respectively connected with digital signal processing unit by receiving radio frequency link；Institute
Disturbance reconstruction link second output terminal is stated by feedback link to be connected with digital processing link；The digital signal processing unit is logical
Local oscillator is crossed respectively to be connected with transmitting radio frequency link, reception radio frequency link, feedback link.
Microphone collected sound signal is modulated it by audio processing modules, amplifies to filter and go to interfere, sound letter
Number by DSP processing modules carry out baseband digital signal processing；Dsp processor is connected with CTCSS, and (continuous speech controls noise elimination system
System), CDCSS (continuous number control squelch system), SELCALL (selective calling system), DTMF (dual-tone multifrequency module) and FSK modulation
Demodulator.
The DAC converter progress digital-to-analogue that voice signal is sent to transmitting radio frequency link after baseband digital signal is handled is adopted
Sample and conversion, access filter amplification circuit, obtained filter after the first frequency mixer is mixed with the signal of local oscillator
Wave amplified signal is respectively sent to circulator and disturbance reconstruction link by coupler.Circulator connection antenna sends out radiofrequency signal
It sees off.
Disturbance reconstruction link is as shown in Fig. 2, the disturbance reconstruction link include the second coupler, four road power splitters, 4
Disturbance reconstruction branch, synthesis unit；Second coupler is connected with power splitter；The power splitter output end and disturbance reconstruction
Branch is connected；The disturbance reconstruction branch includes the delay line being sequentially connected, attenuator, amplifier, phase shifter；The power splitter
Output end is connected with delay line input terminal；The phase shifter output end is connected with synthesis unit input terminal.
Circulator output end is connected with the signal synthesizer input terminal for receiving radio frequency link；Synthesizer is used for disturbance reconstruction
Signal and reception signal cancellation.
Composite signal is filtered, enhanced processing, is mixed with the output signal of local oscillator in the second frequency mixer
Frequently, it is input a signal into dsp processor after carrying out sampling and analog-to-digital conversion process by the first AD conversion unit.
The second coupler second output terminal and the output signal of local oscillator are in third frequency mixer in disturbance reconstruction link
Middle mixing, obtained mixed frequency signal by adjustable operational amplifier handle, then by the second AD conversion unit carry out sampling and
Analog-to-digital conversion process is input a signal into dsp processor, realizes the feedback and Interference Cancellation again of signal.Signal passes through audio
Processing is output to loud speaker.Dsp processor is connected with MCU.
Relative to half-duplex intercom, under the premise of not increasing frequency resource, not increasing time resource, the intercom system
System, can the continuous continual signal for receiving other intercoms and sending over while sending signal to other intercoms.
It is described while including launching technique with the method for frequency intercommunication the present embodiment provides a kind of while with the method for frequency intercommunication
With method of reseptance；
The launching technique includes the following steps：
S11：Voice signal is acquired, by digital signal processing unit, carries out baseband digital signal processing；
S12：Transmitting radio frequency link is by the modulated signal after digital processing, after digital-to-analogue conversion, the signal with local oscillator
It is sent out after the first frequency mixer, the signal after mixing is filtered, amplifies, and circulator, day are sent to by the first coupler
Line；
S13：Signal after the first coupler is sent to reception after disturbance reconstruction link exports disturbance reconstruction signal and penetrates
Frequency link, meanwhile, the signal after the first coupler is sent the signal to by the second coupler in disturbance reconstruction link
Feedback link；
S14：It is mixed with the signal of local oscillator after the output signal of feedback link the second coupler of reception, signal
After adjustable amplification digital signal processing unit is sent to after analog-to-digital conversion module is sampled；
The method of reseptance includes the following steps：
S21：Antenna receives external signal, and synthesis unit is sent to by circulator；
S22：Disturbance reconstruction signal is superimposed by synthesis unit with the external signal by antenna, circulator, realizes local transmitting letter
Number counteracting；
S23：Composite signal is filtered, after adjustable enhanced processing, it is mixed by the second frequency mixer with the signal of local oscillator
After frequency, signal sampling is carried out by analog-digital converter and is then output to digital signal processing unit；
S24：Digital signal processing unit carries out Interference Cancellation, modulation /demodulation to signaling again, will by audio processing modules
Audio signal is delivered to audio output.
Further, the disturbance reconstruction link is for after coupling firing signal, coupled signal to be divided by power splitter
If main line, after carrying out time delay, adjustable damping, amplification, phase shift processing respectively per road, then exported after synthesizer synthesizes.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "inner",
The orientation or positional relationship of the instructions such as "outside" is to be made based on attached orientation or positional relationship shown in FIG. 1 or the invention product
The orientation or positional relationship that used time usually puts, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the present invention.In addition, term " first ", " second ", " third " etc. be only used for distinguish description, and should not be understood as instruction or
Imply relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, can also be electrical connection.
Claims (8)
1. a kind of co-channel full duplex intercom simultaneously, which is characterized in that including digital signal processing unit, transmitting radio frequency link,
Receive radio frequency link, disturbance reconstruction link, feedback link, local oscillator, circulator and antenna；The transmitting radio frequency link with
Circulator, antenna are sequentially connected；The transmitting radio frequency link is connected with disturbance reconstruction link；The disturbance reconstruction link first is defeated
Outlet is connected with radio frequency link first input end is received；The second input terminal of the reception radio frequency link is connected with circulator；It is described
Disturbance reconstruction link second output terminal is connected with feedback link；The digital signal processing unit by local oscillator respectively with
Emit radio frequency link, reception radio frequency link, feedback link to be connected；The transmitting radio frequency link, reception radio frequency link and feedback are penetrated
Frequency link is connected with digital signal processing unit respectively；The disturbance reconstruction link is used to handle the transmitting letter of transmitting link output
Number；The feedback link is used to acquire and handle the transmitting signal of transmitting link output.
2. a kind of co-channel full duplex intercom simultaneously according to claim 1, which is characterized in that the transmitting radio frequency link packet
Include D/A conversion unit, the first mixing unit, the first coupler；The D/A conversion unit, the first mixing unit, the first coupling
Device is sequentially connected；The D/A conversion unit input terminal is connected with digital signal processing unit output end；The transmitting rf chain
Road is connected with circulator, disturbance reconstruction link respectively by the first coupler；The first output end of the local oscillator and first
Mixing unit is connected.
3. a kind of co-channel full duplex intercom simultaneously according to claim 1, which is characterized in that the reception radio frequency link packet
Include synthesis unit, the second mixing unit, the first AD conversion unit；The synthesis unit first input end and the circulator phase
Even；The second input terminal of the synthesis unit is connected with the disturbance reconstruction link second output terminal；The synthesis unit output end
It is sequentially connected with the second mixing unit, the first AD conversion unit, digital signal processing unit；The local oscillator second is defeated
Outlet is connected with the second mixing unit.
4. a kind of co-channel full duplex intercom simultaneously according to claim 1, which is characterized in that the disturbance reconstruction link packet
Include the second coupler, power splitter, at least two disturbance reconstruction branches, synthesis unit；Second coupler and power splitter phase
Even；The power splitter output end is connected with disturbance reconstruction branch；The disturbance reconstruction branch includes the delay line being sequentially connected, declines
Subtract device, amplifier, phase shifter；The power splitter output end is connected with delay line input terminal；The phase shifter output end and synthesis
Unit input terminal is connected.
5. a kind of co-channel full duplex intercom simultaneously according to claim 1, which is characterized in that the feedback link includes the
Three mixing units, the second AD conversion unit；The third mixing unit first input end is exported with disturbance reconstruction link second
End is connected；Third mixing unit described in input terminal is connected by the second AD conversion unit with digital signal processing unit；It is described
Local oscillator third output end is connected with third mixing unit.
6. a kind of co-channel full duplex intercom simultaneously according to claim 1, which is characterized in that the Digital Signal Processing list
Member includes dsp processor, CTCCS, CDCSS, SELCALL, DTMF, FSK modulation demodulation module, audio processing modules, MCU；Institute
CTCCS, CDCSS, SELCALL, DTMF, FSK modulation module, audio processing modules, MCU is stated respectively to be connected with dsp processor.
7. a kind of while with the method for frequency intercommunication, which is characterized in that it is described and meanwhile with the method for frequency intercommunication include launching technique with
Method of reseptance；
The launching technique includes the following steps：
S11：Signal is acquired, by digital signal processing unit, carries out baseband digital signal processing
S12：Transmitting radio frequency link is by the modulated signal after digital processing, after digital-to-analogue conversion, the signal with local oscillator
It is sent out after the first frequency mixer, the signal after mixing is filtered, amplifies, and circulator, day are sent to by the first coupler
Line；
S13：Signal after the first coupler exports disturbance reconstruction signal and be sent to reception by disturbance reconstruction link to be penetrated
Frequency link, meanwhile, the signal after the first coupler is sent the signal to by the second coupler in disturbance reconstruction link
Feedback link；
S14：Feedback link receives the output signal of the second coupler and is mixed it with the signal of local oscillator, signal
After adjustable amplification digital signal processing unit is sent to after analog-to-digital conversion module is sampled；
The method of reseptance includes the following steps：
S21：Antenna receives external signal, and synthesis unit is sent to by circulator；
S22：Disturbance reconstruction signal is superimposed by synthesis unit with the external signal by antenna, circulator, realizes local transmitting letter
Number counteracting；
S23：Composite signal is filtered, after adjustable enhanced processing, it is mixed by the second frequency mixer with the signal of local oscillator
After frequency, signal sampling is carried out by analog-digital converter and is then output to digital signal processing unit；
S24：Digital signal processing unit docks the collection of letters number and carries out self-interference cancellation, demodulation again, and passes through audio processing modules
Audio signal is delivered to audio output.
8. a kind of according to claim 7 while with the method for frequency intercommunication, which is characterized in that the disturbance reconstruction link is used for
After coupling firing signal, if coupled signal is divided into main line by power splitter, per road carry out respectively time delay, adjustable damping, amplification,
After phase shift processing, then exported after synthesizer synthesizes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810363123 | 2018-04-21 | ||
| CN201810363123X | 2018-04-21 |
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| CN108768431A true CN108768431A (en) | 2018-11-06 |
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Cited By (2)
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| CN115021766A (en) * | 2022-08-05 | 2022-09-06 | 北京理工大学 | Co-channel interference elimination device suitable for single antenna framework of circulator |
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Application publication date: 20181106 |