CN105635857A - Real-time break-in operation system for DMR digital interphone - Google Patents
Real-time break-in operation system for DMR digital interphone Download PDFInfo
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- CN105635857A CN105635857A CN201510963892.XA CN201510963892A CN105635857A CN 105635857 A CN105635857 A CN 105635857A CN 201510963892 A CN201510963892 A CN 201510963892A CN 105635857 A CN105635857 A CN 105635857A
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- dmr
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
- H04Q5/24—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- Computer Networks & Wireless Communication (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
A real-time break-in operation system for a DMR (Digital Mobile Radio) digital interphone comprises a central processor TMS320F2812, a DDS radio frequency circuit, an AMBE (Advanced Multi-band Excitation) 3000 vocoder, a microphone, a keyboard, a screen and a power supply module, wherein the microphone is used for acquiring original sound, after the acquired sound is sent to the AMBE3000 vocoder to be encoded, and DMR protocol framing is carried out by the central processor TMS320F2812 combined with a number of a called digital interphone, and transmitted via the DDS radio frequency circuit, so as to realize a real-time break-in operation to a single DMR digital interphone user.
Description
Technical field
The invention belongs to electronic technology/communications field, relating to one utilizes central processing unit TMS320F2812 according to DMR (DigitalMobileRadio, digital mobile radio standard) agreement skips signaling of shaking hands and is directly entered talking state and realizes system that unique user is chipped in real time, is particularly well-suited to the phonetic warning to forbidden digit transmitter receiver.
Background technology
Conventional DMR digital handset utilizes DMR special chip, and complete execution DMR agreement, calling and called, after Handshake Protocol, enter back into voice call state, it is achieved directly communicate between calling and called, it is to avoid disturbed by other users. Meanwhile, based on the digital handset of DMR special chip exploitation except utilizing broadcast mode or group call mode, outside all or part of DMR digital handset can being carried out voice broadcast service, it is impossible to realize carrying out the unique user communicated precisely forcing to chip in.
Existing DMR chip by DMR agreement complete package, open data link layer and physical layer, it is impossible to realize that agreement is self-defined to be redirected. Realize pressure only by broadcast mode or group call mode to chip in, inevitably affect the use of normal users.
Summary of the invention
The technology of the present invention solves problem: adopts individual exhaling and direct mode operation, skips signaling of shaking hands, be directly entered voice communication state, it is achieved the pressure of single called number digit transmitter receiver is chipped in.
The technical solution of the present invention is: DMR digital handset is chipped in system in real time, is made up of central processing unit TMS320F2812, DDS radio frequency chip, AMBE3000 vocoder, mike, keyboard, screen and power module, user passes through input through keyboard called number digit transmitter receiver A number, and loquitur, mike gathers sound, after sending into AMBE3000 vocoder coding, by the central processing unit TMS320F2812 number in conjunction with called number digit transmitter receiver, carry out DMR agreement framing, launched by DDS radio circuit, signaling handshake is completed at a called number digit transmitter receiver A and other digital handset B, when proceeding by the stage of normal speech communication, DMR digital handset system of chipping in real time inserts phonetic warning by force as the third party, realize single DMR digital handset party A-subscriber is chipped in real time, the SPI2 interface of central processing unit TMS320F2812 connects screen, whole duty change procedure in order to display system, power supply and central processing unit TMS320F2812, DDS radio frequency chip is connected with MBE3000 vocoder, in order to provide reliable and stable power supply,
Described AMBE3000 vocoder, mainly completes analog voice is encoded according to AMBE compression protocol, and producing speed is the digital speech code of 2.4kbps, as effective information source, it is provided that carry out DMR framing to TMS320F2812; Central processing unit TMS320F2812 mainly completes DMR agreement framing: by called number digit transmitter receiver number and digital speech code, adopt individual exhaling and direct mode operation, skip signaling of shaking hands, it is directly entered voice communication state, through quadratic residue code QR, Gray code Golay, Hamming code Hamming and elongated BPTC interweaving encoding, generate voice superframes. DDS radio circuit is substantially carried out physical layer four Continuous phase frequency shift keying 4CPFSK modulating-coding: the original sequence being made up of 0 and 1 according to TMS320F2812 input, after carrying out numeral raised cosine roll off filtering, carry out FM modulation again, control the DDS chip of AD9910, generate radiofrequency signal, send into antenna and launch.
Present invention advantage compared with prior art is in that:
The present invention adopts individual exhaling and direct mode operation, skips signaling of shaking hands, is directly entered voice communication state, it is achieved the pressure of single called number digit transmitter receiver is chipped in. Solve existing digital handset to realize pressure only by broadcast mode or group call mode and chip in, the shortcoming inevitably affecting the use of normal users.
Accompanying drawing explanation
Fig. 1 is that the DMR digital handset of the present invention is chipped in system work block diagram in real time;
Fig. 2 is voice superframes structural representation of the present invention;
Fig. 3 is burst A frame structure schematic diagram of the present invention;
Fig. 4 is burst B��F frame structure schematic diagram of the present invention;
Fig. 5 is the proper communication flow chart of mobile terminal A and B of the present invention.
Detailed description of the invention
DMR digital handset is chipped in system in real time, as it is shown in figure 1, be made up of central processing unit TMS320F2812, DDS radio frequency chip, AMBE3000 vocoder, mike, keyboard, screen and power module, user passes through input through keyboard called number digit transmitter receiver number, and loquitur, mike gathers the sound of user, after sending into AMBE3000 vocoder coding, by the central processing unit TMS320F2812 number in conjunction with called number digit transmitter receiver, carry out DMR agreement framing, launched by DDS radio circuit, signaling handshake is completed at called number digit transmitter receiver and an other digital handset, when proceeding by the stage of normal speech communication, DMR digital handset system of chipping in real time inserts phonetic warning by force as the third party, realize DMR digital handset to chip in real time. the whole duty change procedure of on-screen display system. power module provides reliable and stable power supply to all modules in system.
Described AMBE3000 vocoder, mainly complete analog voice according to AMBE (AdvancedMulti-BandExcitation, senior many bands encourage) compression protocol is encoded, producing speed is the digital speech code of 3.6kbps, as effective information source, it is provided that carry out DMR framing to TMS320F2812; Central processing unit TMS320F2812 mainly completes DMR agreement framing: by called number digit transmitter receiver number and digital speech code, adopt individual exhaling and direct mode operation, skip signaling of shaking hands, be directly entered voice communication state, through quadratic residue code QR (16,7,6), Gray code Golay (20,8,7), Hamming code Hamming (16,11,4) and elongated BPTC interweaving encoding, voice superframes is generated. DDS radio circuit is substantially carried out physical layer 4CPFSK (4-Continue-Phase-Frequency-Shift-Key, four Continuous phase frequency shift keyings) modulating-coding: the original sequence being made up of 0 and 1 according to TMS320F2812 input, after carrying out numeral raised cosine roll off filtering, carry out FM modulation again, control the DDS radio circuit of AD9910, generate radiofrequency signal, send into antenna and launch.
Due to TMS320F2812 have abundant in set module and interrupt resources thereof, so programming motility is very strong. The programming of this application system takes full advantage of the interrupt resources that DSP is abundant, so mastery routine is very simple. Mainly include three modules: system initialization module, voice superframes framing module, user interface interaction module.
1, system initialization module programming
The function of system initialization is that the macroscopic system to DSP initializes:
1. set memory space to arrange, define a certain interval storage program;
2. system clock is arranged, and system clock frequency is set to 120MHz;
3. system house dog is arranged, and does not enable house dog;
4. system break is arranged, and open system is always interrupted, clear all interrupt identifications, enables 1 grade of interrupt INT, 3,5 grades of interrupt INT 5 of 1,3 grade of interrupt INT;
2, voice superframes framing module
This functional module mainly completes the framing function of voice superframes. The voice superframes of the DMR of the present invention is made up of 6 voice bursts, takies 360ms. Burst in superframe letter A��F mark. Burst A identifies superframe to start, and wherein comprises frame swynchronization code (SYNC), can undertake embedded letter the present in burst B��F, and superframe structure is as shown in Figure 2.
Burst A structure is as it is shown on figure 3, except the vocoded information (voice) of 2 group of 108 bit, also comprise the frame swynchronization code (SYNC) of 48 bits.
Burst frame B��F structure is as shown in Figure 4, except the vocoded information (voice) of 2 group of 108 bit, also have embedded information field information and the embedded signaling of 32 bits of two group of 8 bit, include colour coding, policy code and start-stop link control message, in order to represent the signaling content such as initial, the stopping of voice communication. Frame swynchronization code (SYNC) is:
Binary system: 011111110111110101011101110101010111110111111101
Hexadecimal: 7F7D5DD57DFD
Normal mobile terminal A and mobile terminal B call flow are as shown in Figure 5.
1. first mobile terminal A sends call request signaling to mobile terminal B;
2. wait that terminal B responds;
If 3. mobile terminal B responds, branch to 4., otherwise wait for;
4. sending voice head signaling, notice terminal B call starts;
5. sending voice messaging with the form of voice superframes, both sides start call;
6. voice call terminates, and sends voice to terminal B and terminates signaling.
The present invention by keyboard control command by TMSF2812, is started or stops loop play voice superframes, inserts voice superframes by force in the of the communication process of mobile terminal A and B 5. step.
Voice superframes cataloged procedure is as follows:
1. the voice messaging of 216bit is carried in each burst of voice superframes, and these voice messagings are through vocoder coding, it is not necessary to extra forward error correction.
2. voice bursts A adopts the voice bursts form with SYNC, carries 48bit voice synchronous code.
3. voice bursts B-F adopts the voice bursts with embedded signaling, carries the embedded signaling of 32*4bit. Specific coding process be 72bit signaling first pass through 5bit verification and, obtain 77bit information. 77bit information encodes then through elongated BPTC, obtains 32*4bit information, through interweaving, is evenly distributed in four voice bursts of B-F, becomes embedded signaling.
The embedded empty information of voice bursts F carrying, embedded empty information is set to 0 entirely.
The content of embedded information is little, but critically important, have employed quadratic residue root QR (16,7,6) coding and Gray Golay (20,8,7) coding carries out Error Control, and cataloged procedure is fairly simple. Quadratic residue root QR (16,7,6) therein is expanded by QR (17,9,5), namely removes two information bits on the basis of QR (17,9,5), adds 1 bit parity check position. (n, q, the n in k) represents that code length, q represent information bit to QR, and k represents check bit. Its generator polynomial is
G (x)=x8+x5+x3+x1+ 1=13916
Golay (20,8,7) is that Golay (23,12,7) blocks, and eliminates 4 information bits, and (n, q, the n in k) represents that code length, q represent information bit to Golay, and k represents check bit. Its generator polynomial is as follows:
G (x)=x11+x10+x6+x5+x4+x2+ 1=AE316
Elongated BPTC coding principle is as shown in table 1.
The elongated BPTC coding schedule of table 1
72 Bit datas first generate the CS check bit of 5 bits be added to data end and form 77 Bit datas, then 77 bits are divided into 7 row 11 column data, first row is carried out Hamming Hamming (16,11) coding, again to column-generation with regard to check code, the mode that finally ranks exchange again is interleaved. (n, q, the n in k) represents that code length, q represent information bit to Hamming, and k represents check bit. Sometimes, k can ignore and not write.
Hamming (16,11,4) generator matrix is as shown in table 2,
Table 2Hamming (16,11,4) generator matrix table
| 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 |
| 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 |
| 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 |
| 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 |
| 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 |
| 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
| 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 1 |
3, user interface interaction module
The main manipulation keyboard of this part and screen, it is achieved the display to the reading of keypad information and working state of system.
4, the DDS radio circuit of AD9910 is mainly according to the TMS320F2812 original sequence being made up of 0 and 1 submitted to, after carrying out numeral raised cosine FIR filter process, then carry out FM modulation, control the DDS chip of AD9910, generate radiofrequency signal, send into antenna and launch.
5, keyboard, screen and power module
User inputs the digital handset number warned by Keysheet module to system. The duty that on-screen display system is current. AMBE3000, TMS320F2812, DDS radio circuit, keyboard and screen are mainly provided stable power-supplying by power module.
The content not being described in detail in description of the present invention belongs to the known prior art of professional and technical personnel in the field.
Claims (1)
1.DMR digital handset is chipped in system in real time, it is characterised in that: it is made up of central processing unit TMS320F2812, DDS radio frequency chip, AMBE3000 vocoder, mike, keyboard, screen and power module, user passes through input through keyboard called number digit transmitter receiver A number, and loquitur, mike gathers sound, after sending into AMBE3000 vocoder coding, by the central processing unit TMS320F2812 number in conjunction with called number digit transmitter receiver, carry out DMR agreement framing, launched by DDS radio circuit, signaling handshake is completed at a called number digit transmitter receiver A and other digital handset B, when proceeding by the stage of normal speech communication, DMR digital handset system of chipping in real time inserts phonetic warning by force as the third party, realize single DMR digital handset party A-subscriber is chipped in real time, the SPI2 interface of central processing unit TMS320F2812 connects screen, whole duty change procedure in order to display system, power supply and central processing unit TMS320F2812, DDS radio frequency chip is connected with MBE3000 vocoder, in order to provide reliable and stable power supply,
Described AMBE3000 vocoder, mainly completes analog voice is encoded according to AMBE compression protocol, and producing speed is the digital speech code of 2.4kbps, as effective information source, it is provided that carry out DMR framing to TMS320F2812; Central processing unit TMS320F2812 mainly completes DMR agreement framing: by called number digit transmitter receiver number and digital speech code, adopt individual exhaling and direct mode operation, skip signaling of shaking hands, it is directly entered voice communication state, through quadratic residue code QR, Gray code Golay, Hamming code Hamming and elongated BPTC (BlockProductTurboCodes block product coding) interweaving encoding, generate voice superframes. DDS radio circuit is substantially carried out physical layer four Continuous phase frequency shift keying 4CPFSK modulating-coding: the original sequence being made up of 0 and 1 according to TMS320F2812 input, after carrying out numeral raised cosine roll off filtering, carry out FM modulation again, control the DDS chip of AD9910, generate radiofrequency signal, send into antenna and launch.
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| CN201510963892.XA CN105635857B (en) | 2015-12-21 | 2015-12-21 | DMR digital walkie-talkie is chipped in system in real time |
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Cited By (2)
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| CN109274455A (en) * | 2018-09-05 | 2019-01-25 | 北京众谱达科技有限公司 | Applied to the radio tube control equipment under complex electromagnetic environment |
| CN111245729A (en) * | 2020-01-07 | 2020-06-05 | 福建科立讯通信有限公司 | Method for digital-analog hybrid IP interconnection of transfer platform |
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| CN111245729A (en) * | 2020-01-07 | 2020-06-05 | 福建科立讯通信有限公司 | Method for digital-analog hybrid IP interconnection of transfer platform |
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Application publication date: 20160601 Assignee: CHINA TECHNOLOGY EXCHANGE Co.,Ltd. Assignor: BEIJING Z.PUDA TECHNOLOGY Co.,Ltd. Contract record no.: X2023110000040 Denomination of invention: DMR digital interphone real-time interphone system Granted publication date: 20190104 License type: Exclusive License Record date: 20230317 |
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Denomination of invention: DMR Digital Interphone Real Time Intercom System Effective date of registration: 20230323 Granted publication date: 20190104 Pledgee: CHINA TECHNOLOGY EXCHANGE Co.,Ltd. Pledgor: BEIJING Z.PUDA TECHNOLOGY Co.,Ltd. Registration number: Y2023110000120 |
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