CN103023573A - Digital optical fiber repeater system for frequency modulation broadcast - Google Patents
Digital optical fiber repeater system for frequency modulation broadcast Download PDFInfo
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- CN103023573A CN103023573A CN2012105876605A CN201210587660A CN103023573A CN 103023573 A CN103023573 A CN 103023573A CN 2012105876605 A CN2012105876605 A CN 2012105876605A CN 201210587660 A CN201210587660 A CN 201210587660A CN 103023573 A CN103023573 A CN 103023573A
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Abstract
The invention relates to the technical field of coverage of signals for frequency modulation broadcast, and discloses a digital optical fiber repeater system for frequency modulation broadcast. A near-end machine of the digital optical fiber repeater system comprises a frequency modulation broadcast receiving antenna, a filter, a low-noise amplifier, a first A/D (analog/digital) converter, an FPGA (field programmable gate array) module, an optical module and an emergency broadcast spotting link, the frequency modulation broadcast receiving antenna, the filter, the low-noise amplifier, the first A/D converter, the FPGA module and the optical module are sequentially connected with one another to form a link, the emergency broadcast signal spotting link comprises an AES (advanced encryption standard) 3 signal input interface, an AES3 digital audio modem, a frequency modulation broadcast modulation module and a second A/D converter, the AES3 signal input interface, the AES3 digital audio modem and the frequency modulation broadcast modulation module are sequentially connected with one another, the frequency modulation broadcast modulation module is connected with the second A/D converter, the second A/D converter is connected with the FPGA module, and the emergency broadcast signal spotting link is used for spotting AES3 digital audio signals, replacing original signals by the AES3 digital audio signals and enabling the AES3 digital audio signals to cover all frequency modulation broadcast channels. According to the technical scheme, the digital optical fiber repeater system has the advantage that a function of spotting the emergency broadcast signals in all FM (frequency modulation) frequency bands can be realized.
Description
Technical field
This practicality invention relates to fm broadcast signal soverlay technique field, specifically relates to a kind of FM broadcasting digital optical fiber repeater system.
Background technology
The FM broadcasting digital optical fiber repeater system comprises reception antenna, near-end machine, optical fiber, remote termination, and transmitting antenna, and the light signal of near-end machine output is given a plurality of remote terminations by the long Distance Transmission of optical cable; Wherein reception antenna is used for receiving the fm broadcast signal from the main transmitter.
The working method of FM broadcasting digital optical fiber repeater system is: the fm broadcast signal of near-end machine coupling information source (or open circuit receives aerial), after utilizing analog-to-digital conversion, FPGA data processing technique with the radiofrequency signal digitlization by the CPRI interface protocol with digital signal by Optical Fiber Transmission to remote termination, can also realize simultaneously the transmission of operation maintenance data; Remote termination is reduced to fm broadcast signal with the digital signal that receives and amplifies output by power amplifier module again, covers respective regions.
It is of wide application the FM broadcasting digital optical fiber repeater system, namely be used for Highways ', city tunnel, civil defence facility, underpass etc., but for some emergencies, for example, the emergency such as earthquake, snow disaster, need to carry out disaster alarm or evacuating personnel etc. by FM broadcasting, existing FM broadcasting digital direct discharging station then is externally to broadcast by a certain frequency modulation frequency range, if the listener does not listen to the broadcasting of this frequency modulation frequency range, will miss listening to of this urgent early warning information so, thereby cause the loss that is difficult to avoid.
Practical summary of the invention
This practicality invention technical problem to be solved is that existing FM broadcasting direct discharging station can only externally be broadcasted by a certain frequency modulation frequency range, if the listener does not listen to the broadcasting of this frequency modulation frequency range, will miss listening to of this urgent early warning information so, thereby cause the loss that is difficult to avoid.In addition, existing FM broadcasting digital optical fiber repeater system.
In order to solve the problems of the technologies described above, the technical scheme that this practicality invention is adopted provides a kind of FM broadcasting digital optical fiber repeater system, realize that all frequency modulation channels all intercut the emergent broadcast signal simultaneously, this programme also provides a kind of emergent broadcast signal inserting method that is applicable to above-mentioned FM broadcasting digital optical fiber repeater system
A kind of FM broadcasting digital optical fiber repeater system comprises near-end machine, optical fiber and a plurality of remote termination, and the light signal of near-end machine output is given a plurality of remote terminations by the long Distance Transmission of optical fiber;
Described near-end machine comprises one tunnel FM broadcasting reception antenna that connects successively, filter, low noise amplifier, the first A/D converter, the FPGA module, and optical module, be used for the fm broadcast signal that the FM broadcasting reception antenna receives from the main transmitter is carried out being modulated into light signal behind the filter and amplification, described near-end machine comprises that also one road emergent broadcast signal intercuts link, described emergent broadcast signal intercuts link and comprises the AES3 signal input interface that connects successively, AES3 digital audio modulation demodulator, and FM broadcasting modulation module, described emergent broadcast signal intercuts link and also comprises the second A/D converter, described FM broadcasting modulation module is connected with the second A/D converter, described the second A/D converter is connected with the FPGA module, described emergent broadcast signal intercuts link and is used for intercutting the AES3 digital audio and video signals, and with its replacement and be covered to all FM broadcast channels
Described near-end machine also comprises monitor board, described monitor board is connected with described FPGA module, described monitor board is sent to the FPGA module with control command, and the control command of described FPGA module responds monitor board is used for the switching of control fm broadcast signal and AES3 digital audio and video signals;
Described remote termination comprises optical module, FPGA digital logic module, D/A converter, FM broadcasting band power amplifier, FM filter and the retransmitting antenna that connects successively, be used for converting light signal to radiofrequency signal, then carry out power amplification, the enough power signals of final output are launched by retransmitting antenna, with fm broadcast signal coverage goal zone.
Further, described AES3 signal input interface is XLR audio frequency terminal.
Further, described each near-end machine connects 4 remote terminations by optical fiber.
Further, 15 remote terminations of described each remote termination cascade.
Further, described remote termination also comprises mains-supplied power supply and solar powered power supply.
Further, described near-end machine also comprises fm broadcast signal monitoring module, and described fm broadcast signal is monitored module and is connected with described FGPA module.
Further, described fm broadcast signal monitoring module is the 3.5MM stereophone.
A kind of emergent broadcast signal inserting method that is applicable to above-mentioned FM broadcasting digital optical fiber repeater system, may further comprise the steps: described AES3 signal input interface inputs to AES3 digital audio modulation device with the emergent broadcast signal of the stereo audio form that needs intercut, be modulated into digital audio and video signals, and transmit it to the fm demodulation module, described fm demodulation module is equipped with frequency with this digital audio and video signals, change into and intercut the frequency modulation analog signal with voice modulation, and transmitting it to the second A/D converter, described the second A/D converter intercuts the frequency modulation analog signal conversion with this and becomes the emergent broadcast signal to intercut the digital information of signal frequency point; Described monitor board is sent to the FPGA module with control command, the control command of described FPGA module responds monitor board, this emergent broadcast signal is intercutted the copying of digital information of signal frequency point to each main transmitter frequency, give a plurality of remote terminations by the long Distance Transmission of optical fiber.
This practicality invention compared with prior art, has following advantage by adopting technique scheme:
1, native system can realize that all frequency modulation frequency ranges all intercut the emergent broadcast signal simultaneously, allow all listeners in the overlay area with the emergent broadcast signal that can in time hear this disaster alarm or evacuating personnel, thereby take necessary hedging and evacuation measure, maximizedly reduce and avoid casualties and property loss;
2, each remote termination in the native system disposes separately mains-supplied power supply and solar powered power supply, in case certain a certain middle situation that affects equipment work such as remote termination power failure, IF board damage and synchronization failure in communication link protection, the rear class remote termination is answered unaffected and can be worked, adopt simultaneously solar powered power supply, can also realize energy-saving and emission-reduction, have the advantage of environmental protection.
Description of drawings
Fig. 1 is the link structure schematic diagram of the FM broadcasting digital optical fiber repeater system of this practicality invention;
Fig. 2 is the networking connection diagram of the FM broadcasting digital optical fiber repeater system of this practicality invention;
Embodiment
Now with embodiment this practicality invention is further specified by reference to the accompanying drawings.
As a specific embodiment, as shown in Figure 1, a kind of FM broadcasting digital optical fiber repeater system of this practicality invention comprises near-end machine, optical fiber and a plurality of remote termination, and the light signal of near-end machine output is given a plurality of remote terminations by the long Distance Transmission of optical fiber; Described near-end machine comprises one tunnel FM broadcasting reception antenna that connects successively, filter, low noise amplifier, the first A/D converter, the FPGA module, and optical module, be used for the fm broadcast signal that the FM broadcasting reception antenna receives from the main transmitter is carried out being modulated into light signal behind the filter and amplification, described near-end machine comprises that also one road emergent broadcast signal intercuts link, described emergent broadcast signal intercuts link and comprises the AES3 signal input interface that connects successively, AES3 digital audio modulation demodulator, and FM broadcasting modulation module, described emergent broadcast signal intercuts link and also comprises the second A/D converter, described FM broadcasting modulation module is connected with the second A/D converter, described the second A/D converter is connected with the FPGA module, described emergent broadcast signal intercuts link and is used for intercutting the AES3 digital audio and video signals, and with its replacement and be covered to all FM broadcast channels;
Described remote termination comprises SFP optical module, FPGA digital logic module, D/A converter, FM broadcasting band power amplifier, FM filter and the retransmitting antenna that connects successively, be used for converting light signal to radiofrequency signal, then carry out power amplification, the enough power signals of final output are launched by retransmitting antenna, with fm broadcast signal coverage goal zone
Described near-end machine also comprises monitor board, described monitor board is connected with described FPGA module, described monitor board is sent to the FPGA module with control command, and the control command of described FPGA module responds monitor board is used for the switching of control fm broadcast signal and AES3 digital audio and video signals.
Concrete emergent broadcast signal inserting method, may further comprise the steps: described AES3 signal input interface inputs to AES3 digital audio modulation device with the emergent broadcast signal of the stereo audio form that needs intercut, be modulated into digital audio and video signals, and transmit it to the fm demodulation module, described fm demodulation module is equipped with frequency with this digital audio and video signals, change into and intercut the frequency modulation analog signal with voice modulation, and transmitting it to the second A/D converter, described the second A/D converter intercuts the frequency modulation analog signal conversion with this and becomes the emergent broadcast signal to intercut the digital information of signal frequency point; Described monitor board is sent to the FPGA module with control command, the control command of described FPGA module responds monitor board, the copying of digital information that this emergent broadcast signal is intercutted signal frequency point is given a plurality of remote terminations by the long Distance Transmission of optical fiber to the frequency of each main transmitter.
Further, described AES3 signal input interface is XLR audio frequency terminal.
With reference to shown in Figure 2, in the FM broadcasting digital optical fiber repeater system networking structure of this practicality invention, each near-end machine connects 4 remote terminations by optical fiber, but maximum 15 remote terminations of cascade of each remote termination.Therefore, the networking minimum unit of the FM broadcasting digital optical fiber repeater system in this practicality invention can be by a near-end machine, and 16 * 4=64 platform remote termination consists of, and is large with the area coverage zone, realizes the optimization of cost and networking.
Further, the remote termination in this practicality invention also comprises mains-supplied power supply and solar powered power supply.In case certain a certain middle situation that affects equipment work such as remote termination power failure, IF board damage and synchronization failure in communication link protection, the rear class remote termination is answered unaffected and can be worked, adopt simultaneously solar powered power supply, can also realize energy-saving and emission-reduction, have the advantage of environmental protection.
Further, the near-end machine in this practicality invention also comprises fm broadcast signal monitoring module, and described fm broadcast signal is monitored module and is connected with described FGPA module, and it is the 3.5MM stereophone that described fm broadcast signal is monitored module.By monitoring module, to realize listen requirement, so that the FM broadcasting digital optical fiber repeater system of this practicality invention can apply to more areas and occasion.
Although specifically show and introduced this practicality invention in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope that do not break away from this practicality invention that appended claims limits; can make a variety of changes this practicality invention in the form and details, be the protection range of this practicality invention.
Claims (8)
1. FM broadcasting digital optical fiber repeater system is characterized in that: comprise near-end machine, optical fiber and a plurality of remote termination, the light signal of near-end machine output is given a plurality of remote terminations by the long Distance Transmission of optical fiber;
Described near-end machine comprises one tunnel FM broadcasting reception antenna that connects successively, filter, low noise amplifier, the first A/D converter, the FPGA module, and optical module, be used for the fm broadcast signal that the FM broadcasting reception antenna receives from the main transmitter is carried out being modulated into light signal behind the filter and amplification, described near-end machine comprises that also one road emergent broadcast signal intercuts link, described emergent broadcast signal intercuts link and comprises the AES3 signal input interface that connects successively, AES3 digital audio modulation demodulator, and FM broadcasting modulation module, described emergent broadcast signal intercuts link and also comprises the second A/D converter, described FM broadcasting modulation module is connected with the second A/D converter, described the second A/D converter is connected with the FPGA module, described emergent broadcast signal intercuts link and is used for intercutting the AES3 digital audio and video signals, and with its replacement and be covered to all FM broadcast channels
Described near-end machine also comprises monitor board, described monitor board is connected with described FPGA module, described monitor board is sent to the FPGA module with control command, and the control command of described FPGA module responds monitor board is used for the switching of control fm broadcast signal and AES3 digital audio and video signals;
Described remote termination comprises optical module, FPGA digital logic module, D/A converter, FM broadcasting band power amplifier, FM filter and the retransmitting antenna that connects successively, be used for converting light signal to radiofrequency signal, then carry out power amplification, the enough power signals of final output are launched by retransmitting antenna, with fm broadcast signal coverage goal zone.
2. a kind of FM broadcasting digital optical fiber repeater system according to claim 1, it is characterized in that: described AES3 signal input interface is XLR audio frequency terminal.
3. a kind of FM broadcasting digital optical fiber repeater system according to claim 1 is characterized in that: described each near-end machine connects 4 remote terminations by optical fiber.
4. a kind of FM broadcasting digital optical fiber repeater system according to claim 1 is characterized in that: 15 remote terminations of described each remote termination cascade.
5. according to claim 1 to 4 arbitrary described a kind of FM broadcasting digital optical fiber repeater systems, it is characterized in that: described each remote termination also comprises mains-supplied power supply and solar powered power supply.
6. according to claim 1 to 4 arbitrary described a kind of FM broadcasting digital optical fiber repeater systems, it is characterized in that: described near-end machine also comprises fm broadcast signal monitoring module, and described fm broadcast signal is monitored module and is connected with described FGPA module.
7. a kind of FM broadcasting digital optical fiber repeater system according to claim 6 is characterized in that: it is the 3.5MM stereophone that described fm broadcast signal is monitored module.
8. an emergent broadcast signal inserting method that is applicable to the claims 1 to 7 arbitrary described FM broadcasting digital optical fiber repeater system is characterized in that, may further comprise the steps:
Described AES3 signal input interface inputs to AES3 digital audio modulation device with the emergent broadcast signal of the stereo audio form that needs intercut, be modulated into digital audio and video signals, and transmit it to FM fm demodulation module, described FM fm demodulation module is equipped with frequency with this digital audio and video signals, change into and intercut the frequency modulation analog signal with voice modulation, and transmitting it to the second A/D converter, described the second A/D converter intercuts the frequency modulation analog signal conversion with this and becomes the emergent broadcast signal to intercut the digital information of signal frequency point; The copying of digital information that described FPGA module is intercutted signal frequency point to this emergent broadcast signal is given a plurality of remote terminations by the long Distance Transmission of optical fiber to the frequency of each main transmitter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210587660.5A CN103023573B (en) | 2012-12-31 | 2012-12-31 | Digital optical fiber repeater system for frequency modulation broadcast |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210587660.5A CN103023573B (en) | 2012-12-31 | 2012-12-31 | Digital optical fiber repeater system for frequency modulation broadcast |
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| CN103023573A true CN103023573A (en) | 2013-04-03 |
| CN103023573B CN103023573B (en) | 2015-06-03 |
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| CN201210587660.5A Expired - Fee Related CN103023573B (en) | 2012-12-31 | 2012-12-31 | Digital optical fiber repeater system for frequency modulation broadcast |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103490837A (en) * | 2013-08-02 | 2014-01-01 | 深圳市智远能科技有限公司 | Stackable high-capacity professional audio building broadcasting system |
| CN104301044A (en) * | 2014-09-28 | 2015-01-21 | 成都九华圆通科技发展有限公司 | Wide-frequency-band high-sensitivity large-spurious-free-dynamic-range light receiving box and light receiving method thereof |
| CN107437950A (en) * | 2017-08-04 | 2017-12-05 | 杭州长泽科技有限公司 | A kind of tunnel fm broadcast signal numeral covering scheme and implementation method |
| CN113890657A (en) * | 2021-09-18 | 2022-01-04 | 北京北广科技股份有限公司 | Multifunctional emergency broadcasting system |
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| CN101895357A (en) * | 2010-07-12 | 2010-11-24 | 上海新干通通信设备有限公司 | Multi-frequency frequency modulation broadcast system capable of switching in critical alarm speech signal |
| CN202475433U (en) * | 2012-02-07 | 2012-10-03 | 三维通信股份有限公司 | Remote system for optical repeater station of FM broadcasting |
| CN203027262U (en) * | 2012-12-31 | 2013-06-26 | 厦门胜华通信技术有限公司 | Frequency-modulation broadcasting digital optical fibre repeater system |
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2012
- 2012-12-31 CN CN201210587660.5A patent/CN103023573B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895357A (en) * | 2010-07-12 | 2010-11-24 | 上海新干通通信设备有限公司 | Multi-frequency frequency modulation broadcast system capable of switching in critical alarm speech signal |
| CN202475433U (en) * | 2012-02-07 | 2012-10-03 | 三维通信股份有限公司 | Remote system for optical repeater station of FM broadcasting |
| CN203027262U (en) * | 2012-12-31 | 2013-06-26 | 厦门胜华通信技术有限公司 | Frequency-modulation broadcasting digital optical fibre repeater system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490837A (en) * | 2013-08-02 | 2014-01-01 | 深圳市智远能科技有限公司 | Stackable high-capacity professional audio building broadcasting system |
| CN104301044A (en) * | 2014-09-28 | 2015-01-21 | 成都九华圆通科技发展有限公司 | Wide-frequency-band high-sensitivity large-spurious-free-dynamic-range light receiving box and light receiving method thereof |
| CN107437950A (en) * | 2017-08-04 | 2017-12-05 | 杭州长泽科技有限公司 | A kind of tunnel fm broadcast signal numeral covering scheme and implementation method |
| CN113890657A (en) * | 2021-09-18 | 2022-01-04 | 北京北广科技股份有限公司 | Multifunctional emergency broadcasting system |
| CN113890657B (en) * | 2021-09-18 | 2023-08-29 | 北京北广科技股份有限公司 | Multifunctional Emergency Broadcasting System |
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| CN103023573B (en) | 2015-06-03 |
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Granted publication date: 20150603 Termination date: 20171231 |