CN109379315A - A method and receiver for automatically identifying FM and DMR signals - Google Patents
A method and receiver for automatically identifying FM and DMR signals Download PDFInfo
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- CN109379315A CN109379315A CN201811557986.7A CN201811557986A CN109379315A CN 109379315 A CN109379315 A CN 109379315A CN 201811557986 A CN201811557986 A CN 201811557986A CN 109379315 A CN109379315 A CN 109379315A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 4
- 230000004069 differentiation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0012—Modulated-carrier systems arrangements for identifying the type of modulation
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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
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
-
- 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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
本发明提供一种自动识别FM和DMR信号的方法及接收机，其中识别方法包括获取输入信号；搜索信号中是否具有DMR协议下的SYNC信号，若搜索到SYNC信号，则判断为当前输入信号为DMR信号，否则，判断为当前输入信号为FM信号。本发明提供自动识别FM和DMR信号的方法，能够充分利用两种信号固有的差别来区分并自主选择解调方案，达到自动接收的目的，能够在不增加任何协议和亚音开销的前提下，完成FM和DMR两种信号的区分以及自动接收，适用于需要进行多模式兼容的对讲机产品。
The invention provides a method and a receiver for automatically identifying FM and DMR signals, wherein the identifying method includes acquiring an input signal; searching whether the signal has a SYNC signal under the DMR protocol, and if the SYNC signal is found, it is determined that the current input signal is DMR signal, otherwise, it is determined that the current input signal is an FM signal. The invention provides a method for automatically identifying FM and DMR signals, which can make full use of the inherent differences between the two signals to distinguish and autonomously select a demodulation scheme, achieve the purpose of automatic reception, and can achieve the purpose of automatic reception without increasing any protocol and subtone overhead. Complete the distinction and automatic reception of FM and DMR signals, suitable for walkie-talkie products that require multi-mode compatibility.
Description
Technical field
The invention mainly relates to digital walkie-talkie correlative technology field, specifically a kind of automatic identification FM and DMR signal
Method and receiver.
Background technique
In existing intercom application, currently mainly there are two kinds of agreements of FM and DMR, the market volume of two kinds of intercoms all compares
It is larger.It needs respectively to identify two kinds of signals if encountering the scene that two kinds of agreements coexist, then receive.It is main at present
There are two types of modes.
One is intercoms to have two kinds of demodulation abilities of FM and DMR, by people come control selections.This scheme is most widely used
General, the disadvantage is that person is needed to select, selection mistake then misses reception.
Another kind is to use subsonics as distinguishing, and searches when receiver and is taken as DMR signal less than specific subsonics signal.It is this
Although scheme can judge automatically signal classification, receiving-transmitting sides need prior rendezvous protocol, and FM sends specific subsonics signal.Not only
Subsonics resource is occupied, and the also bad realization under the scene that certain personnel, equipment temporarily polymerize.
Summary of the invention
For the deficiency for solving current technology, the present invention combination prior art provides a kind of automatic knowledge from practical application
The method and receiver of other FM and DMR signal, can under the premise of not increasing any agreement and subsonics expense, complete FM and
The differentiation of two kinds of signals of DMR and automatic reception, it is more convenient to use.
Technical scheme is as follows:
According to an aspect of the present invention, the method for a kind of automatic identification FM and DMR signal are provided, including
Obtain input signal；
It searches for whether with the SYNC signal under DMR agreement in signal, if searching SYNC signal, is judged as current defeated
Entering signal is DMR signal, otherwise, is judged as that current input signal is FM signal.
Further, after getting input signal, input signal is amplified first, frequency conversion, filtering and A/D turn
It changes, the signal after conversion is scanned for again later.
Further, the process having time limitation of SYNC signal is searched for.
Further, the time for searching for SYNC signal is 360ms.
Further, it after having judged signal classification, to the corresponding signal demodulation mechanism of FM or DMR signal enabling, completes to use
Family signal receives.
According to another aspect of the present invention, the receiver of a kind of automatic identification FM and DMR signal, including radio-frequency front-end are provided
And digital signal processor, wherein
The radio-frequency front-end includes signal acquisition module, and the signal acquisition module is for obtaining aerial input signal；
The digital signal processor includes judgment module, the judgment module for search in the signal got whether
With the SYNC signal under DMR agreement, if searching SYNC signal, it is judged as that current input signal is DMR signal, otherwise,
It is judged as that current input signal is FM signal.
The radio-frequency front-end further includes signal processing module, and the signal processing module is used for the input signal got
It amplifies, frequency conversion and filtering, the A/D conversion for signal conversion is provided between radio-frequency front-end and digital signal processor
Device.
Further, which further includes timer, and the timer is searched for setting the digital signal processor
The time of rope SYNC signal.
Further, the time for the search SYNC signal that the timer is set is 360ms.
Further, the digital signal processor further includes FM signal demodulation module, DMR signal demodulation module, judgement
DMR signal is sent to DMR signal demodulation module and demodulated, FM signal is sent to by unit after having judged signal classification
FM signal demodulation module is demodulated.
Beneficial effects of the present invention:
The present invention provides the method for automatic identification FM and DMR signal, can make full use of two kinds of signal built-in distinctions
It distinguishes and independently selects demodulation scheme, reach automatic received purpose, it can be before not increasing any agreement and subsonics expense
It puts, completes the differentiation and automatic reception of two kinds of signals of FM and DMR, it can be right using the receiver of recognition methods of the invention
FM and DMR signal is quickly identified, is applicable to carry out the compatible intercom product of multi-mode.
Detailed description of the invention
Attached drawing 1 is receiver structure schematic illustration of the invention；
Attached drawing 2 is the workflow schematic diagram of invention；
Attached drawing 3 is DMR standard voice superframes schematic diagram of the invention.
Specific embodiment
With reference to the drawings and specific embodiments, the invention will be further described.It should be understood that these embodiments are merely to illustrate
The present invention rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, this field
Technical staff can make various changes or modifications the present invention, and such equivalent forms equally fall within range defined herein.
As shown in Figure 1, 2, the present invention is suitble to need to receive two kinds of standard signals of FM and DMR, and judges and ring in real time
The application scenarios answered.Receiver radio frequency front end of the invention is obtaining aerial inband signaling in continuous search, and to signal into
Row amplification, frequency conversion and filtering processing, when signal level is enough, timer starts timing, while the A/D converter of rear class is adopted
Sample, digital signal processor start to scan for the SYNC signal of DMR, and handle respectively according to following two situations:
1. then stopping search when timer timing is to the setting upper limit and SYNC signal does not occur yet and judging that current demand signal is
FM standard starts FM demodulation mechanism；
2. then stopping search when searching SYNC and judging that current demand signal for DMR standard, starts DMR demodulation mechanism.
It is of the invention that the specific working principle is as follows:
According to 102 361-1 V2.4.1 (2016-02) of international norm ETSI TS, the signal of DMR standard can largest interval
360ms sends the SYNC signal of primary fixed pattern, as shown in Fig. 3.There is no default SYNC signals in FM standard.
Therefore under the premise of signal is sufficiently strong, as long as search is less than SYNC signal within the time greater than 360ms, i.e.,
Can conclude that the signal not is DMR standard.Standard differentiation and selection demodulation mode can be carried out as a result,.
Receiver with the recognition methods can be automatically performed signal identification and complete demodulation in an appropriate manner, improve
The convenience that user uses under multimode communication scene.
Claims (10)
1. a kind of method of automatic identification FM and DMR signal, which is characterized in that including
Obtain input signal；
It searches for whether with the SYNC signal under DMR agreement in signal, if searching SYNC signal, is judged as current input letter
Number be DMR signal, otherwise, be judged as current input signal be FM signal.
2. a kind of method of automatic identification FM and DMR signal as described in claim 1, which is characterized in that getting input
After signal, input signal is amplified first, frequency conversion, filtering and A/D conversion, the signal after conversion is searched again later
Rope.
3. a kind of method of automatic identification FM and DMR signal as described in claim 1, which is characterized in that search SYNC signal
Process having time limitation.
4. a kind of method of automatic identification FM and DMR signal as claimed in claim 3, it is characterised in that: search SYNC signal
Time be 360ms.
5. a kind of method of automatic identification FM and DMR signal as described in claim 1, it is characterised in that: judged class signal
After not, to the corresponding signal demodulation mechanism of FM or DMR signal enabling, completes subscriber signal and receive.
6. a kind of receiver of automatic identification FM and DMR signal, which is characterized in that including radio-frequency front-end and Digital Signal Processing
Device, wherein
The radio-frequency front-end includes signal acquisition module, and the signal acquisition module is for obtaining aerial input signal；
The digital signal processor includes judgment module, and whether the judgment module has for searching in the signal got
SYNC signal under DMR agreement is judged as that current input signal is DMR signal if searching SYNC signal, otherwise, judgement
It is FM signal for current input signal.
7. a kind of receiver of automatic identification FM and DMR signal as claimed in claim 6, which is characterized in that before the radio frequency
End further includes signal processing module, the signal processing module for being amplified to the input signal got, frequency conversion and filter
Wave is provided with the A/D converter for signal conversion between radio-frequency front-end and digital signal processor.
8. a kind of receiver of automatic identification FM and DMR signal as claimed in claim 6, which is characterized in that the receiver is also
Including timer, the timer is used to set the time of the digital signal processor search SYNC signal.
9. a kind of receiver of automatic identification FM and DMR signal as claimed in claim 8, which is characterized in that the timer
The time of the search SYNC signal set is 360ms.
10. a kind of receiver of automatic identification FM and DMR signal as claimed in claim 6, which is characterized in that the number letter
Number processor further includes FM signal demodulation module, DMR signal demodulation module, and judging unit is after having judged signal classification, by DMR
Signal is sent to DMR signal demodulation module and is demodulated, and FM signal is sent to FM signal demodulation module and is demodulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811557986.7A CN109379315A (en) | 2018-12-19 | 2018-12-19 | A method and receiver for automatically identifying FM and DMR signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811557986.7A CN109379315A (en) | 2018-12-19 | 2018-12-19 | A method and receiver for automatically identifying FM and DMR signals |
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| Publication Number | Publication Date |
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| CN109379315A true CN109379315A (en) | 2019-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811557986.7A Pending CN109379315A (en) | 2018-12-19 | 2018-12-19 | A method and receiver for automatically identifying FM and DMR signals |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865882A (en) * | 2021-01-19 | 2021-05-28 | 南京中新赛克科技有限责任公司 | Anti-frequency-deviation DMR interphone signal rapid identification method |
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| US20180255479A1 (en) * | 2017-03-03 | 2018-09-06 | LGS Innovations LLC | Methods and apparatuses for batch radio resource command and control in overloaded networks |
| CN209088996U (en) * | 2018-12-19 | 2019-07-09 | 深圳市楷盟无线通信有限公司 | A kind of receiver of automatic identification FM and DMR signal |
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2018
- 2018-12-19 CN CN201811557986.7A patent/CN109379315A/en active Pending
Patent Citations (5)
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| CN1488140A (en) * | 2001-11-26 | 2004-04-07 | ������������ʽ���� | Optical recording device, optical reproducing device, method for recording optical recording medium, and method for reproducing optical recording medium |
| CN203445889U (en) * | 2013-09-04 | 2014-02-19 | 上海聚星仪器有限公司 | Multi-channel DMR signal monitor |
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| US20180255479A1 (en) * | 2017-03-03 | 2018-09-06 | LGS Innovations LLC | Methods and apparatuses for batch radio resource command and control in overloaded networks |
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| CN112865882A (en) * | 2021-01-19 | 2021-05-28 | 南京中新赛克科技有限责任公司 | Anti-frequency-deviation DMR interphone signal rapid identification method |
| CN112865882B (en) * | 2021-01-19 | 2024-05-10 | 南京中新赛克科技有限责任公司 | Anti-frequency offset DMR interphone signal rapid identification method |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190708 Address after: 518000 Wenhui Community, Xin'an Street, Baoan District, Shenzhen City, Guangdong Province, 269 Qianjin Road, Guanlida Building, 720 Applicant after: SHENZHEN KAIMENG WIRELESS COMMUNICATION CO.,LTD. Address before: 518000 Cuixinju, Bagua Fourth Road, Futian District, Shenzhen City, Guangdong Province, 2 A708 Rooms Applicant before: Tian Zhisheng |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20190222 |