CN203027262U - Frequency-modulation broadcasting digital optical fibre repeater system - Google Patents
Frequency-modulation broadcasting digital optical fibre repeater system Download PDFInfo
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- CN203027262U CN203027262U CN 201220742997 CN201220742997U CN203027262U CN 203027262 U CN203027262 U CN 203027262U CN 201220742997 CN201220742997 CN 201220742997 CN 201220742997 U CN201220742997 U CN 201220742997U CN 203027262 U CN203027262 U CN 203027262U
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Abstract
The utility model relates to the technical field of frequency-modulation broadcasting signals, and particularly relates to a frequency-modulation broadcasting digital optical fibre repeater system. In the frequency-modulation broadcasting digital optical fibre repeater system, a near-end machine comprises a frequency-modulation broadcasting receiving antenna, a filter, a low-noise amplifier, a first A/D (analogue/digital) converter, an FPGA (field programmable gate array) module and an optical module which are sequentially connected; the near-end machine further comprises an emergency broadcasting signal insert-broadcasting chain; the emergency broadcasting signal insert-broadcasting chain comprises an ASES3 signal input interface, an ASES3 digital audio modulator-demodulator, and a frequency-modulation broadcasting modulation module which are sequentially connected; the emergency broadcasting signal insert-broadcasting chain further comprises a second A/D converter; the frequency-modulation broadcasting modulation module is connected with the second A/D converter, and the second A/D converter is connected with the FPGA module; the emergency broadcasting signal insert-broadcasting chain is used for insert-broadcasting an ASES3 digital audio signal, replacing the ASES3 digital audio signal, and covering all frequency-modulation broadcasting channels. By adopting the technical scheme, the frequency-modulation broadcasting digital optical fibre repeater system disclosed by the utility model can be used for realizing an emergency broadcasting signal insert-broadcasting function for all FM (frequency-modulation) frequency bands.
Description
Technical field
The utility model 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 grown Distance Transmission to a plurality of remote terminations by optical cable; Wherein reception antenna, be 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 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.
The utility model content
Technical problem to be solved in the utility model 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 the utility model adopts is to provide 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 grown Distance Transmission to a plurality of remote terminations by 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 after 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 controlling the switching of 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, comprise the following 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 transmit 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 digital information of intercutting signal frequency point, described monitor board is sent to the FPGA module with control command, and the control command of described FPGA module responds monitor board to each main transmitter frequency, is grown Distance Transmission to this emergent copying of digital information that intercuts signal frequency point to a plurality of remote terminations by optical fiber.
The utility model 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 native system configures 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 FM broadcasting digital optical fiber repeater system of the present utility model;
Fig. 2 is the networking connection diagram of FM broadcasting digital optical fiber repeater system of the present utility model;
Embodiment
Now with embodiment, the utility model is further illustrated 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 the present utility model comprises near-end machine, optical fiber and a plurality of remote termination, and the light signal of near-end machine output is grown Distance Transmission to a plurality of remote terminations by 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 after 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 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 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 transmit 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 digital information of intercutting signal frequency point, described monitor board is sent to the FPGA module with control command, and the control command of described FPGA module responds monitor board to the frequency of each main transmitter, is grown Distance Transmission to this emergent copying of digital information that intercuts signal frequency point to a plurality of remote terminations by optical fiber.
Further, described AES3 signal input interface is XLR audio frequency terminal.
With reference to shown in Figure 2, in FM broadcasting digital optical fiber repeater system networking structure of the present utility model, 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 the utility model can be by a near-end machine, and 16 * 4=64 platform remote termination consists of, and is regional large with area coverage, realizes the optimization of cost and networking.
Further, the remote termination in the utility model 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 the utility model 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, make FM broadcasting digital optical fiber repeater system of the present utility model can apply to more areas and occasion.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (7)
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 grow Distance Transmission to a plurality of remote terminations by 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 after 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 controlling the switching of 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, it 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.
According to claim 1 to 4 arbitrary described a kind of FM broadcasting digital optical fiber repeater system, it is characterized in that: described each remote termination also comprises mains-supplied power supply and solar powered power supply.
According to claim 1 to 4 arbitrary described a kind of FM broadcasting digital optical fiber repeater system, it is characterized in that: described near-end machine comprises that also fm broadcast signal monitors 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742997 CN203027262U (en) | 2012-12-31 | 2012-12-31 | Frequency-modulation broadcasting digital optical fibre repeater system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742997 CN203027262U (en) | 2012-12-31 | 2012-12-31 | Frequency-modulation broadcasting digital optical fibre repeater system |
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| CN203027262U true CN203027262U (en) | 2013-06-26 |
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| CN 201220742997 Expired - Fee Related CN203027262U (en) | 2012-12-31 | 2012-12-31 | Frequency-modulation broadcasting digital optical fibre repeater system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023573A (en) * | 2012-12-31 | 2013-04-03 | 厦门胜华通信技术有限公司 | Digital optical fiber repeater system for frequency modulation broadcast |
-
2012
- 2012-12-31 CN CN 201220742997 patent/CN203027262U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023573A (en) * | 2012-12-31 | 2013-04-03 | 厦门胜华通信技术有限公司 | Digital optical fiber repeater system for frequency modulation broadcast |
| CN103023573B (en) * | 2012-12-31 | 2015-06-03 | 厦门胜华通信技术有限公司 | Digital optical fiber repeater system for frequency modulation broadcast |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20171231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |