CN201887769U - Short wave transmission system - Google Patents
Short wave transmission system Download PDFInfo
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- CN201887769U CN201887769U CN2010206040071U CN201020604007U CN201887769U CN 201887769 U CN201887769 U CN 201887769U CN 2010206040071 U CN2010206040071 U CN 2010206040071U CN 201020604007 U CN201020604007 U CN 201020604007U CN 201887769 U CN201887769 U CN 201887769U
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Abstract
The utility model discloses a short wave transmission system, which comprises transmitting equipment and a plurality of far-end channel processing units. The transmitting equipment is provided with a multichannel analog signal multiplexing circuit and an optical transmitter, an input end of the multichannel analog signal multiplexing circuit is connected with a plurality of antennas, an output end of the multichannel analog signal multiplexing circuit is connected with the optical transmitter, the far-end channel processing units are connected with the optical transmitter and further jointly connected with a digital switching unit via matching optical fibers respectively, and the digital switching unit is further connected with a plurality of receivers corresponding to the far-end channel processing units. The transmission system can lead the antennas to be far away from severe electromagnetic environments, is fine in communication quality, high in reliability, small in volume, light in weight and convenient in communication dispatching and monitoring, and can greatly reduce cable joints as the antennas can simultaneously share the receivers.
Description
Technical field
The utility model relates to a kind of wireless transmitting system, relates in particular to a kind of shortwave transmission system.
Background technology
As everyone knows, short-wave receiver is to receive radio electromagnetsm ripple signal from the short-wave receiver antenna, is sent to receiver by high frequency cable or balanced line.High frequency cable has bigger loss in transmission course, so can't make long-distance transmissions, therefore, collection of letters antenna all is arranged near the receiver.In military use, in case antenna is detected discovery by the enemy, the receving station position just exposes easily.And when receving station was arranged at the tunnel, cable was generally longer, and receptivity is reduced greatly.When adopting the balanced line transmission, though loss is less, can't enter the tunnel, the also handy high frequency cable of tunnel part.The shortcoming of balanced line transmission be blow, rain, transmission line damages easily when snowing, and needs frequent maintaining.
The utility model content
The utility model provides a kind of shortwave transmission system, for solving the problem that lacks safe and reliable transmission means between existing short-wave receiver system middle distance receiver far away and the antenna.
To achieve these goals, the technical solution adopted in the utility model is: a kind of shortwave transmission system, comprise transmitter, multichannel analog signals multiplex circuit and optical sender with its input connection multiple antenna, the output of multichannel analog signals multiplex circuit connects optical sender, the far-end channel bank that connects optical sender, the far-end channel bank connects digital switching element by the optical cable of its outfit respectively more jointly, and digital switching element connects many receivers corresponding with a plurality of far-end channel banks again.
Further, described far-end channel bank comprises protective circuit, filter, low noise amplifier, agc circuit, wide and narrow strip signal processor, agc circuit, the optical-electrical converter that connects successively; The wide and narrow strip signal processor also is connected optical cable by far-end passback control module with optical-electrical converter simultaneously.
Further, described digital switching element comprises many groups of optical-electrical converter and the A/D converters that link to each other successively that connect optical-electrical converter by optical cable, and A/D converter connects the D/A converter of a plurality of connection receivers again by the intelligent array Switching Module; Also comprise the local side passback control module that is connected far-end passback control module by optical cable with optical-electrical converter, local side passback control module connects intelligent array Switching Module and computer by the integrated management control module.
Further, described optical sender comprises: a laser modulator, the output that connects the multichannel analog signals multiplex circuit is to be modulated into light signal to the radiofrequency signal of being exported, one is positioned at the laser modulator surface to detect the Temperature Detector of its temperature, a temperature that detects according to Temperature Detector, the control refrigerator is to the automatic temperature-adjusting control circuit of laser modulator refrigeration; The direct predistortion circuit of full frequency band that is arranged on before the laser modulator.
The beneficial effect that the utility model brings is: can make antenna away from abominable electromagnetic environment, good communication quality, good reliability, multiple antenna is shared multi-section receiver simultaneously, can significantly reduce cable joint, volume is little, in light weight, makes things convenient for communication scheduling and monitoring.To the laser modulator temperature controlling, make this transmission system under-50 ℃ to+70 ℃ ambient temperatures, to work by the automatic temperature-adjusting control circuit.The direct predistortion circuit of full frequency band produces second-order distortion and even-order distortion product and third order distortion and odd-order distortion product, directly laser is being modulated then, can balance out the distortion of laser greatly.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments.
As shown in Figure 1, a kind of shortwave transmission system comprises transmitter 1, has multichannel analog signals multiplex circuit and optical sender that its input connects multiple antenna, and the output of multichannel analog signals multiplex circuit connects optical sender; And the far-end channel bank 2 that connects optical sender, far-end channel bank 2 connects digital switching element 3 by the optical cable of its outfit respectively more jointly, and digital switching element 3 connects many receivers 4 corresponding with a plurality of far-end channel bank 2 again.
Further, described far-end channel bank 2 comprises protective circuit, filter, low noise amplifier, agc circuit, wide and narrow strip signal processor, agc circuit, the optical-electrical converter that connects successively; The wide and narrow strip signal processor also is connected optical cable by far-end passback control module with optical-electrical converter simultaneously.
Described digital switching element 3 comprises many groups of optical-electrical converter and the A/D converters that link to each other successively that connect optical-electrical converter by optical cable, and A/D converter connects the D/A converter of a plurality of connection receivers 4 again by the intelligent array Switching Module; Also comprise the local side passback control module that is connected far-end passback control module by optical cable with optical-electrical converter, local side passback control module connects intelligent array Switching Module and computer by the integrated management control module.Wherein, integrated management control module connects computer by Ethernet or RS232.
Described optical sender comprises: a laser modulator, the output that connects the multichannel analog signals multiplex circuit is to be modulated into light signal to the radiofrequency signal of being exported, one is positioned at the laser modulator surface to detect the Temperature Detector of its temperature, a temperature that detects according to Temperature Detector, the control refrigerator is to the automatic temperature-adjusting control circuit of laser modulator refrigeration; The direct predistortion circuit of full frequency band that is arranged on before the laser modulator.
Claims (4)
1. a shortwave transmission system is characterized in that: comprise transmitter, have multichannel analog signals multiplex circuit and optical sender that its input connects multiple antenna, the output connection optical sender of multichannel analog signals multiplex circuit; And the far-end channel bank that connects optical sender, the far-end channel bank connects digital switching element by the optical cable of its outfit respectively more jointly, and digital switching element connects many receivers corresponding with a plurality of far-end channel banks again.
2. a kind of shortwave transmission system according to claim 1 is characterized in that: described far-end channel bank comprises protective circuit, filter, low noise amplifier, agc circuit, wide and narrow strip signal processor, agc circuit, the optical-electrical converter that connects successively; The wide and narrow strip signal processor also is connected optical cable by far-end passback control module with optical-electrical converter simultaneously.
3. a kind of shortwave transmission system according to claim 1 and 2, it is characterized in that: described digital switching element comprises many groups of optical-electrical converter and the A/D converters that link to each other successively that connect optical-electrical converter by optical cable, and A/D converter connects the D/A converter of a plurality of connection receivers again by the intelligent array Switching Module; Also comprise the local side passback control module that is connected far-end passback control module by optical cable with optical-electrical converter, local side passback control module connects intelligent array Switching Module and computer by the integrated management control module.
4. a kind of shortwave transmission system according to claim 3, it is characterized in that: described optical sender comprises: a laser modulator, the output that connects the multichannel analog signals multiplex circuit is to be modulated into light signal to the radiofrequency signal of being exported, one is positioned at the laser modulator surface to detect the Temperature Detector of its temperature, a temperature that detects according to Temperature Detector, the control refrigerator is to the automatic temperature-adjusting control circuit of laser modulator refrigeration; The direct predistortion circuit of full frequency band that is arranged on before the laser modulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206040071U CN201887769U (en) | 2010-11-12 | 2010-11-12 | Short wave transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206040071U CN201887769U (en) | 2010-11-12 | 2010-11-12 | Short wave transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201887769U true CN201887769U (en) | 2011-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206040071U Expired - Lifetime CN201887769U (en) | 2010-11-12 | 2010-11-12 | Short wave transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201887769U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105991675A (en) * | 2015-01-29 | 2016-10-05 | 大唐联诚信息系统技术有限公司 | Signal processing system and signal processing method |
-
2010
- 2010-11-12 CN CN2010206040071U patent/CN201887769U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105991675A (en) * | 2015-01-29 | 2016-10-05 | 大唐联诚信息系统技术有限公司 | Signal processing system and signal processing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |
|
| CX01 | Expiry of patent term | ||
| DD01 | Delivery of document by public notice |
Addressee: Patent director of Sichuan Huiyuan Jixun Digital Technology Co.,Ltd. Document name: Notice of expiration of patent right |
|
| DD01 | Delivery of document by public notice |