CN103023573B - 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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- CN103023573B CN103023573B CN201210587660.5A CN201210587660A CN103023573B CN 103023573 B CN103023573 B CN 103023573B CN 201210587660 A CN201210587660 A CN 201210587660A CN 103023573 B CN103023573 B CN 103023573B
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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 digital optical fiber repeater system for frequency modulation broadcast.
Background technology
Digital optical fiber repeater system for frequency modulation broadcast, comprises reception antenna, near-end machine, optical fiber, remote termination, and transmitting antenna, and the light signal that near-end machine exports gives multiple remote termination by optical cable long range propagation; Wherein reception antenna, for receiving the fm broadcast signal from main transmitter.
The working method of digital optical fiber repeater system for frequency modulation broadcast is: the fm broadcast signal of near-end machine coupling information source (or open circuit receives aerial), utilize analog-to-digital conversion, FPGA data processing technique by after radiofrequency signal digitlization by CPRI interface protocol by digital signal by Optical Fiber Transmission to remote termination, the transmission of operation maintenance data can also be realized simultaneously; The digital signal received is reduced to fm broadcast signal and amplifies output by power amplifier module again by remote termination, covers respective regions.
Digital optical fiber repeater system for frequency modulation broadcast its be of wide application, namely for Highways ', city tunnel, civil defence facility, underpass etc., but for some emergencies, such as, 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 is then externally broadcasted by a certain frequency modulation frequency range, if listener does not listen to the broadcast of this frequency modulation frequency range, so will miss listening to of this urgent early warning information, thus cause the loss being difficult to avoid.
practical summary of the invention
This practicality invention technical problem to be solved is that existing FM broadcasting direct discharging station externally can only be broadcasted by a certain frequency modulation frequency range, if listener does not listen to the broadcast of this frequency modulation frequency range, so will miss listening to of this urgent early warning information, thus cause the loss being difficult to avoid.In addition, existing digital optical fiber repeater system for frequency modulation broadcast.
In order to solve the problems of the technologies described above, this practicality is invented the technical scheme adopted and is to provide a kind of digital optical fiber repeater system for frequency modulation broadcast, realize all frequency modulation channels and intercut emergent broadcast signal all simultaneously, this programme additionally provides a kind of emergent broadcast signal inserting method being applicable to above-mentioned digital optical fiber repeater system for frequency modulation broadcast
A kind of digital optical fiber repeater system for frequency modulation broadcast, comprises near-end machine, optical fiber and multiple remote termination, and the light signal that near-end machine exports gives multiple remote termination by optical fiber long range propagation;
Described near-end machine comprises the FM radio receiver antenna that a road connects successively, filter, low noise amplifier, first A/D converter, FPGA module, and optical module, for FM radio receiver antenna is received carry out filter and amplification from the fm broadcast signal of main transmitter after be modulated into light signal, described near-end machine also comprises a road emergent broadcast signal and intercuts link, described emergent broadcast signal intercuts link and comprises the AES3 digital audio and video signals input interface connected 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 second A/D converter is connected with FPGA module, described emergent broadcast signal intercuts link for intercutting AES3 digital audio and video signals, and AES3 digital audio and video signals is replaced to intercutting frequency-modulated analog signals and being covered to all FM broadcast channels of band voice modulation,
Described near-end machine also comprises monitor board; described monitor board is connected with described FPGA module; control command is sent to FPGA module by described monitor board, and the control command of described FPGA module response monitoring plate, for controlling the switching of fm broadcast signal and AES3 digital audio and video signals;
Described remote termination comprises the SFP SFP optical module, FPGA digital logic module, D/A converter, FM broadcasting band power amplifier, FM filter and the retransmitting antenna that connect successively, for converting light signal to radiofrequency signal, then power amplification is carried out, the enough power signals of final output are launched by retransmitting antenna, by fm broadcast signal coverage goal region.
Further, described AES3 signal input interface is XLR audio terminal.
Further, each near-end machine described is by Fiber connection 4 remote terminations.
Further, each remote termination cascade described 15 remote terminations.
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 and monitors module, and described fm broadcast signal is monitored module and is connected with described FPGA module.
Further, described fm broadcast signal monitors module is 3.5MM stereophone.
A kind of emergent broadcast signal inserting method being applicable to above-mentioned digital optical fiber repeater system for frequency modulation broadcast, comprise the following steps: described AES3 signal input interface inputs to AES3 digital audio modulation device by needing the emergent broadcast signal of the stereo audio form intercutted, be modulated into digital audio and video signals, and transmit it to fm demodulation module, this digital audio and video signals is equipped with frequency by described fm demodulation module, what change into band voice modulation intercuts frequency-modulated analog signals, and transmit it to the second A/D converter, this is intercutted frequency-modulated analog signals and converts the digital information that emergent broadcast signal intercuts signal frequency point to by described second A/D converter, control command is sent to FPGA module by described monitor board, the control command of described FPGA module response monitoring plate, the copying of digital information this emergent broadcast signal being intercutted signal frequency point, on the frequency of each main transmitter, gives multiple remote termination by optical fiber long range propagation.
This practicality invention is by adopting technique scheme, and compared with prior art, tool has the following advantages:
1, native system can realize all frequency modulation frequency ranges and intercut emergent broadcast signal all simultaneously, allow all listeners in overlay area with the emergent broadcast signal can hearing this disaster alarm or evacuating personnel in time, thus take necessary hedging and evacuation measure, maximized reduction and avoid casualties and property loss;
2, each remote termination in native system configures separately mains-supplied power supply and solar powered power supply, once when a certain middle situations affecting equipment work such as certain remote termination power failure, IF board damage and synchronization failures in communication link protection, rear class remote termination is answered unaffected and can normally be worked, adopt solar powered power supply simultaneously, can also energy-saving and emission-reduction be realized, there is the advantage of environmental protection.
Accompanying drawing explanation
Fig. 1 is the link structure schematic diagram of the digital optical fiber repeater system for frequency modulation broadcast of this practicality invention;
Fig. 2 is the networking connection diagram of the digital optical fiber repeater system for frequency modulation broadcast of this practicality invention;
Embodiment
Now with embodiment, this practicality invention is further illustrated by reference to the accompanying drawings.
As a specific embodiment, as shown in Figure 1, a kind of digital optical fiber repeater system for frequency modulation broadcast of this practicality invention, comprises near-end machine, optical fiber and multiple remote termination, and the light signal that near-end machine exports gives multiple remote termination by optical fiber long range propagation, described near-end machine comprises the FM radio receiver antenna that a road connects successively, filter, low noise amplifier, first A/D converter, FPGA module, and optical module, for FM radio receiver antenna is received carry out filter and amplification from the fm broadcast signal of main transmitter after be modulated into light signal, described near-end machine also comprises a road emergent broadcast signal and intercuts link, described emergent broadcast signal intercuts link and comprises the AES3 signal input interface connected 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 second A/D converter is connected with FPGA module, described emergent broadcast signal intercuts link for intercutting AES3 digital audio and video signals, and replaced and be covered to all FM broadcast channels,
Described remote termination comprises the SFP optical module, FPGA digital logic module, D/A converter, FM broadcasting band power amplifier, FM filter and the retransmitting antenna that connect successively, for converting light signal to radiofrequency signal, then power amplification is carried out, the enough power signals of final output are launched by retransmitting antenna, by fm broadcast signal coverage goal region
Described near-end machine also comprises monitor board, described monitor board is connected with described FPGA module, control command is sent to FPGA module by described monitor board, and the control command of described FPGA module response monitoring plate, for controlling the switching of fm broadcast signal and AES3 digital audio and video signals.
Concrete emergent broadcast signal inserting method, comprise the following steps: described AES3 signal input interface inputs to AES3 digital audio modulation device by needing the emergent broadcast signal of the stereo audio form intercutted, be modulated into digital audio and video signals, and transmit it to fm demodulation module, this digital audio and video signals is equipped with frequency by described fm demodulation module, what change into band voice modulation intercuts frequency-modulated analog signals, and transmit it to the second A/D converter, this is intercutted frequency-modulated analog signals and converts the digital information that emergent broadcast signal intercuts signal frequency point to by described second A/D converter, control command is sent to FPGA module by described monitor board, the control command of described FPGA module response monitoring plate, the copying of digital information this emergent broadcast signal being intercutted signal frequency point, on the frequency of each main transmitter, gives multiple remote termination by optical fiber long range propagation.
Further, described AES3 signal input interface is XLR audio terminal.
Shown in figure 2, in the digital optical fiber repeater system for frequency modulation broadcast networking structure of this practicality invention, each near-end machine is by Fiber connection 4 remote terminations, and each remote termination at most can cascade 15 remote terminations.Therefore, the networking minimum unit of the digital optical fiber repeater system for frequency modulation broadcast in this practicality invention can by a near-end machine, and 16 × 4=64 platform remote termination is formed, large with area coverage region, 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.Once when a certain middle situations affecting equipment work such as certain remote termination power failure, IF board damage and synchronization failures in communication link protection, rear class remote termination is answered unaffected and can normally be worked, adopt solar powered power supply simultaneously, can also energy-saving and emission-reduction be realized, there is the advantage of environmental protection.
Further, the near-end machine in this practicality invention also comprises fm broadcast signal and monitors module, and described fm broadcast signal monitors module and described FGPA model calling, and it is 3.5MM stereophone that described fm broadcast signal monitors module.By monitoring module, to realize listen requirement, the digital optical fiber repeater system for frequency modulation broadcast that this practicality is invented can apply to more areas and occasion.
Although specifically show in conjunction with preferred embodiment and describe this practicality invention; but those skilled in the art should be understood that; in the spirit and scope not departing 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. a digital optical fiber repeater system for frequency modulation broadcast, is characterized in that: comprise near-end machine, optical fiber and multiple remote termination, and the light signal that near-end machine exports gives multiple remote termination by optical fiber long range propagation;
Described near-end machine comprises the FM radio receiver antenna that a road connects successively, filter, low noise amplifier, first A/D converter, FPGA module, and optical module, for FM radio receiver antenna is received carry out filter and amplification from the fm broadcast signal of main transmitter after be modulated into light signal, described near-end machine also comprises a road emergent broadcast signal and intercuts link, described emergent broadcast signal intercuts link and comprises the AES3 digital audio and video signals input interface connected 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 second A/D converter is connected with FPGA module, described emergent broadcast signal intercuts link for intercutting AES3 digital audio and video signals, and AES3 digital audio and video signals is replaced to intercutting frequency-modulated analog signals and being covered to all FM broadcast channels of band voice modulation,
Described near-end machine also comprises monitor board; described monitor board is connected with described FPGA module; control command is sent to FPGA module by described monitor board, and the control command of described FPGA module response monitoring plate, for controlling the switching of fm broadcast signal and AES3 digital audio and video signals;
Concrete emergent broadcast signal inserting method, comprise the following steps: described AES3 signal input interface inputs to AES3 digital audio modulation device by needing the emergent broadcast signal of the stereo audio form intercutted, be modulated into digital audio and video signals, and transmit it to fm demodulation module, this digital audio and video signals is equipped with frequency by described fm demodulation module, what change into band voice modulation intercuts frequency-modulated analog signals, and transmit it to the second A/D converter, this is intercutted frequency-modulated analog signals and converts the digital information that emergent broadcast signal intercuts signal frequency point to by described second A/D converter, control command is sent to FPGA module by described monitor board, the control command of described FPGA module response monitoring plate, the copying of digital information this emergent broadcast signal being intercutted signal frequency point, on the frequency of each main transmitter, gives multiple remote termination by optical fiber long range propagation
Described remote termination comprises the SFP SFP optical module, FPGA digital logic module, D/A converter, FM broadcasting band power amplifier, FM filter and the retransmitting antenna that connect successively, for converting light signal to radiofrequency signal, then power amplification is carried out, the enough power signals of final output are launched by retransmitting antenna, by fm broadcast signal coverage goal region.
2. a kind of digital optical fiber repeater system for frequency modulation broadcast according to claim 1, is characterized in that: described AES3 signal input interface is XLR audio terminal.
3. a kind of digital optical fiber repeater system for frequency modulation broadcast according to claim 1, is characterized in that: each near-end machine described is by Fiber connection 4 remote terminations.
4. a kind of digital optical fiber repeater system for frequency modulation broadcast according to claim 1, is characterized in that: each remote termination cascade described 15 remote terminations.
5., according to the arbitrary described a kind of digital optical fiber repeater system for frequency modulation broadcast of Claims 1-4, it is characterized in that: each described remote termination also comprises mains-supplied power supply and solar powered power supply.
6. according to the arbitrary described a kind of digital optical fiber repeater system for frequency modulation broadcast of Claims 1-4, it is characterized in that: described near-end machine also comprises fm broadcast signal and monitors module, described fm broadcast signal is monitored module and is connected with described FPGA module.
7. a kind of digital optical fiber repeater system for frequency modulation broadcast according to claim 6, is characterized in that: it is 3.5MM stereophone that described fm broadcast signal monitors module.
8. be applicable to an emergent broadcast signal inserting method for the arbitrary described digital optical fiber repeater system for frequency modulation broadcast of the claims 1 to 7, it is characterized in that, comprise the following steps:
Described AES3 signal input interface inputs to AES3 digital audio modulation device by needing the emergent broadcast signal of the stereo audio form intercutted, be modulated into digital audio and video signals, and transmit it to FM fm demodulation module, this digital audio and video signals is equipped with frequency by described FM fm demodulation module, what change into band voice modulation intercuts frequency-modulated analog signals, and transmitting it to the second A/D converter, this is intercutted frequency-modulated analog signals and converts the digital information that emergent broadcast signal intercuts signal frequency point to by described second A/D converter; Described FPGA module intercuts this emergent broadcast signal the copying of digital information of signal frequency point on the frequency of each main transmitter, gives multiple remote termination by optical fiber long range propagation.
Priority Applications (1)
| 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 CN103023573A (en) | 2013-04-03 |
| CN103023573B true CN103023573B (en) | 2015-06-03 |
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Families Citing this family (4)
| 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 |
| 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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|---|---|---|---|---|
| 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 |
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Granted publication date: 20150603 Termination date: 20171231 |