CN201215951Y - Digital enclave companding system - Google Patents
Digital enclave companding system Download PDFInfo
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- CN201215951Y CN201215951Y CNU2008201090715U CN200820109071U CN201215951Y CN 201215951 Y CN201215951 Y CN 201215951Y CN U2008201090715 U CNU2008201090715 U CN U2008201090715U CN 200820109071 U CN200820109071 U CN 200820109071U CN 201215951 Y CN201215951 Y CN 201215951Y
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- digital
- companding
- frequency
- enclave
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model relates to a digital enclave companding system, which comprises a base station, a digital enclave companding local termination and a digital enclave companding remote termination, wherein the base station is connected with the digital enclave companding local termination through a wireless communication channel or a wire coupling circuit, a local end chain circuit sending antenna is arranged on the digital enclave companding local termination, a remote end chain circuit receiving antenna is arranged on the receiving end of the digital enclave companding remote termination, a sending antenna is arranged on the sending end of the digital enclave companding remote termination, and the digital enclave companding remote termination and the digital enclave companding local termination comprise ascending digital companding frequency-select processing units, descending digital companding frequency-select processing units and other parts. Both of the ascending digital companding frequency-select processing units and the descending digital companding frequency-select processing units are provided with RF input processing parts, analog-to-digital converters, digital intermediate frequency processing modules, digital-to-analog conversion modules, RF output processing parts, clock control modules, power processing units, main control units and interface units. The utility model has the advantages that the noise suppression capability is higher, the overpower protection capability is highly effective, the performance index is good, the structure is simple, the cost is low and the implement is easy.
Description
Technical field
The utility model relates to a kind of enclave companding system, particularly relates to a kind of digital enclave companding system, belongs to the mobile communication equipment technical field.
Background technology
Enclave companding system is a kind of system that carries out long-distance transmissions in the narrower low-frequency range of frequency band that the bigger signal of communication of occupied bandwidth is compressed to, it arrives frequency range outside the band of 4M bandwidth to the working frequency range Signal Compression to 1M at near-end, at far-end the signal despreading is reduced in former frequency range, carry out covering behind the linear amplification, can effectively solve the signal problem in areas such as the comparatively nervous area of coverage of city frequency resource and hilliness, Duo Shan, forest, grassland, desert, offshore sea waters.Using in the prior art is simulation enclave companding system comparatively widely, this system adopts analog signal to compress and despreading, though can improve some problems, but also have a lot of comparatively serious problems affect communication quality, the one, select in order to realize multichannel, thereby will be doubled and redoubled on hardware, and the consistency of sound table device is difficult to guarantee; The 2nd, the overlay area communication quality is poor, the duplexing filtering of slave unit is to power amplifier output, equipment all adopts analogue technique, all very irregular rectangles during filtering, therefore caused signal noise higher, the problem of area of coverage ubiquity communication quality difference, the most crucial part of enclave companding system of the prior art belongs to intermediate-frequency section, because this part also adopts analog component, therefore realize that the frequency-selecting meeting causes hardware device to increase, increase equipment power dissipation, and signal is being carried out in the compression process,, thereby bringing the situation of area of coverage speech quality difference because the relatively poor selection type of filter causes the compression process error rate to increase, the 3rd, the system noise sound pitch is difficult to realize that one drags many situations, equipment all adopts analog form from filtering to the intermediate frequency shift frequency, thereby from the filter that shift frequency all adopts the rectangularity difference that extracts of signal, causes the noise of equipment height, noise after the multiple devices stack is big, has seriously limited one of equipment and has dragged use more.Thereby, develop and a kind ofly have superior performance index, have higher noise inhibiting ability, guarantee one to drag many enforcement, have more efficiently that the enclave companding system of power defencive function is very necessary and urgent.
The utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of have higher noise inhibiting ability, more efficiently the overpower protection function, can realize that one drags many digital enclaves companding system.
The technical scheme of digital enclave of the present utility model companding system is achieved in that a kind of digital enclave of the present utility model companding system, comprise base station, digital enclave companding near-end machine, digital enclave companding remote termination, described base station links to each other with digital companding near-end machine by wireless channel or wired coupling circuit, described digital companding near-end machine is established near-end link transmitting antenna, and described digital enclave companding remote termination receiving terminal is established far-end link reception antenna, transmitting terminal is established transmitting antenna.
And described digital enclave companding remote termination comprises the descending duplexer that is connected with far-end link reception antenna, described descending duplexer is connected with descending low noise amplifier, described descending low noise amplifier links to each other with descending digital companding frequency-selecting processing unit, described descending digital companding frequency-selecting processing unit is connected with downlink power amplifier, described downlink power amplifier is connected with up duplexer, described up duplexer is connected with transmitting antenna, described up duplexer also is connected with up low noise amplifier, described up low noise amplifier is connected with upstream digital companding frequency-selecting processing unit, described upstream digital companding frequency-selecting processing unit is connected with the ascending power amplifier, described ascending power amplifier links to each other with descending duplexer, establish monitoring unit and clock control cell between described descending digital companding frequency-selecting unit and the upstream digital companding frequency-selecting unit, described monitoring unit also with described downlink power amplifier, ascending power amplifier and clock control cell connect.
And described descending digital companding frequency-selecting processing unit is established RF input processing section, described RF input processing section is connected with analog to digital converter, described analog to digital converter is connected with the Digital IF Processing module, described Digital IF Processing module is connected with D/A converter module, described D/A converter module connects RF output processing part branch, also establish clock control module in the described digital frequency-selecting module, described clock control module and described RF input processing section, analog-to-digital conversion module, the Digital IF Processing module, D/A converter module is connected, and described digital frequency-selecting module also is provided with the power supply processing unit, main control unit and interface unit.
And described upstream digital companding frequency-selecting processing unit has identical setting with described descending digital companding frequency-selecting processing unit.
Operation principle: following behavior example, base station signal enters the near-end machine of digital enclave companding system by wired coupling (directly type numeral enclave companding system), filtering by descending duplexer, handing over Signal Compression by the frequency compression shift frequency unit in the companding near-end of digital enclave again is the 220MHZ frequency in the 4MHZ bandwidth and with its shift frequency, then by launching after the up duplexer filtering, after numeral enclave companding remote termination receives the low frequency 220MHZ signal of boil down to 4MHZ, descending duplexer filtering through digital enclave companding remote termination, enter digital descending digital companding frequency-selecting processing unit it is carried out digital frequency-selecting and reduction processing, be reduced to the signal of 900MHZ, again by the downlink power amplifier amplifying emission.Described digital companding frequency-selecting processing unit is a core of the present utility model, and all far-end compandings are handled, channel is selected, filter function is all realized in a slice FPGA.RF imports the processing section, the RF output processing part is divided the amplification that realizes input signal, down-conversion in the simulation, anti-aliasing filter, functions such as mirror image filtering, analog-to-digital conversion, D/A converter module is finished modulus and digital-to-analogue conversion, clock control module provides the simulation RF local oscillation signal that part needs, also be analog-to-digital conversion module simultaneously, D/A converter module, FPGA provides work clock, main control unit and interface unit are that the each several part in the digital companding frequency-selecting processing unit is controlled, and provide communication interface with the upper level control unit, the power supply processing unit provides stable operating voltage for each device in the digital companding frequency-selecting processing unit, and the external power source input requires to be direct current 7-9V.
In the companding system of digital enclave of the present utility model when between base station and the digital enclave companding system near-end machine by wired coupling be the digital enclave of direct type companding system, what be coupled by radiofrequency signal between base station and digital enclave companding system near-end machine is the digital enclave of radio frequency type companding system.
A kind of digital enclave of the present utility model companding system has following advantage with respect to prior art:
What 1, the signal processing of digital enclave of the present utility model companding system adopted is that high performance digital companding selects processing unit, has guaranteed to have more the superior function index with simulation enclave companding system.
2, upstream noise inhibit feature in the companding system of digital enclave of the present utility model guarantees the emission of up link noiseless power when the traffic time slot is idle of digital enclave companding system, has also just avoided raising the back noise level of base station uplink receiver.
3, digital enclave of the present utility model companding system has the overpower protection function, guarantees that digital high-frequency amplification station is operated in the normal output power range, can not produce overpower output phenomenon, has avoided exporting the interference that all kinds of spurious signals cause system.
Description of drawings
Fig. 1 is the direct type schematic diagram of digital enclave companding system of the present utility model;
Fig. 2 is a digital enclave of the present utility model companding system radio frequency type schematic diagram;
Fig. 3 is a digital enclave of the present utility model companding system remote termination schematic diagram;
Fig. 4 is the inner schematic diagram of forming of digital companding frequency-selecting processing unit module of digital enclave of the present utility model companding system.
Embodiment
For can being known, one of ordinary skill in the art understands the technical solution of the utility model, existing in conjunction with the accompanying drawings to the further explanation at large of the utility model do:
Digital enclave of the present utility model companding system, as shown in Figure 1, comprise base station 1, digital enclave companding near-end machine 2, digital enclave companding remote termination 3, base station 1 links to each other with digital companding near-end machine 2 by wireless channel or wired coupling circuit, digital companding near-end machine 2 is established near-end link transmitting antenna 4, and digital enclave companding remote termination 3 receiving terminals are established far-end link reception antenna 5, transmitting terminal is established transmitting antenna 6.
As shown in Figure 2, digital further enclave companding remote termination 3 comprises the descending duplexer 301 that is connected with far-end link reception antenna 5, descending duplexer 301 is connected with descending low noise amplifier 302, descending low noise amplifier 302 links to each other with descending digital companding frequency-selecting processing unit 303, descending digital companding frequency-selecting processing unit 303 is connected with downlink power amplifier 304, downlink power amplifier 304 is connected with up duplexer 305, up duplexer 305 is connected with transmitting antenna 6, up duplexer 305 also is connected with up low noise amplifier 306, up low noise amplifier 306 is connected with upstream digital companding frequency-selecting processing unit 307, upstream digital companding frequency-selecting processing unit 307 is connected with ascending power amplifier 308, ascending power amplifier 308 links to each other with descending duplexer 301, establish monitoring unit 309 and clock control cell 310 between descending digital companding frequency-selecting unit 303 and the upstream digital companding frequency-selecting unit 307, monitoring unit 309 also with described downlink power amplifier 304, ascending power amplifier 306 and clock control cell 310 connect.
As shown in Figure 3, descending further digital companding frequency-selecting processing unit 303 is established RF input processing section 3031, RF input processing section 3031 is connected with analog to digital converter 3032, analog to digital converter 3032 is connected with Digital IF Processing module 3033, Digital IF Processing module 3033 is connected with D/A converter module 3034, D/A converter module 3034 connects the RF output processing part and divides 3035, also establish clock control module 3036 in the descending digital companding frequency-selecting processing unit 303, clock control module 3036 and RF input processing section 3031, analog-to-digital conversion module 3032, Digital IF Processing module 3033, D/A converter module 3034 is connected, and descending digital companding frequency-selecting processing unit 303 also is provided with power supply processing unit 3039, main control unit 3038 and interface unit 3037.
And upstream digital companding frequency-selecting processing unit 303 has identical setting with described descending digital companding frequency-selecting processing unit 307.
Specific embodiment: digital enclave companding near-end machine 2 is installed in 1 machine room of base station, adopts radio frequency type numeral enclave companding system or direct type numeral enclave companding system as required.The companding system is an example with direct type numeral enclave, by feeder line digital enclave companding near-end machine 2 signals are drawn cat head, by near-end link transmitting antenna 4 (adopting the low frequency parabolic antenna) signal behind the companding shift frequency is launched, numeral enclave companding remote termination 3 also carries out signal by far-end link reception antenna 5 (low frequency parabolic antenna) and receives, become normal GSM signal by companding remote termination 3 despreadings of digital enclave then the area of coverage is covered, coverage effect all can satisfy its covering requirement after system's construction was finished.
Claims (3)
1, a kind of digital enclave companding system, comprise base station, digital enclave companding near-end machine, digital enclave companding remote termination, it is characterized in that, described base station links to each other with digital companding near-end machine by wireless channel or wired coupling circuit, described digital companding near-end machine is established near-end link transmitting antenna, and described digital enclave companding remote termination receiving terminal is established far-end link reception antenna, transmitting terminal is established transmitting antenna.
2, digital enclave according to claim 1 companding system, it is characterized in that, described digital enclave companding remote termination comprises the descending duplexer that is connected with far-end link reception antenna, described descending duplexer is connected with descending low noise amplifier, described descending low noise amplifier links to each other with descending digital companding frequency-selecting processing unit, described descending digital companding frequency-selecting processing unit is connected with downlink power amplifier, described downlink power amplifier is connected with up duplexer, described up duplexer is connected with transmitting antenna, described up duplexer also is connected with up low noise amplifier, described up low noise amplifier is connected with upstream digital companding frequency-selecting processing unit, described upstream digital companding frequency-selecting processing unit is connected with the ascending power amplifier, described ascending power amplifier links to each other with descending duplexer, establish monitoring unit and clock control cell between described descending digital companding frequency-selecting unit and the upstream digital companding frequency-selecting unit, described monitoring unit also with described downlink power amplifier, ascending power amplifier and clock control cell connect.
3, digital enclave according to claim 2 companding system, it is characterized in that, described descending digital companding frequency-selecting processing unit is established RF input processing section, described RF input processing section is connected with analog to digital converter, described analog to digital converter is connected with the Digital IF Processing module, described Digital IF Processing module is connected with D/A converter module, described D/A converter module connects RF output processing part branch, also establish clock control module in the described digital frequency-selecting module, described clock control module and described RF input processing section, analog-to-digital conversion module, the Digital IF Processing module, D/A converter module is connected, and described digital frequency-selecting module also is provided with the power supply processing unit, main control unit and interface unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201090715U CN201215951Y (en) | 2008-07-07 | 2008-07-07 | Digital enclave companding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201090715U CN201215951Y (en) | 2008-07-07 | 2008-07-07 | Digital enclave companding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201215951Y true CN201215951Y (en) | 2009-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201090715U Expired - Lifetime CN201215951Y (en) | 2008-07-07 | 2008-07-07 | Digital enclave companding system |
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| Country | Link |
|---|---|
| CN (1) | CN201215951Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951613A (en) * | 2010-09-19 | 2011-01-19 | 芯通科技（成都）有限公司 | Novel method for frequency shift companding system to establish station |
-
2008
- 2008-07-07 CN CNU2008201090715U patent/CN201215951Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951613A (en) * | 2010-09-19 | 2011-01-19 | 芯通科技（成都）有限公司 | Novel method for frequency shift companding system to establish station |
| CN101951613B (en) * | 2010-09-19 | 2013-02-27 | 成都芯通科技股份有限公司 | Novel method for frequency shift companding system to establish station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CYLIX COMMUNICATION TECHNOLOGY CO., LTD. Free format text: FORMER NAME: CYLIX (BEIJING) COMMUNICATION EQUIPMENT CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 100044 Beijing city Haidian District Road No. 22 Hing Building 18 Patentee after: DESIREE COX (BEIJING) COMMUNICATIONS EQUIPMENT CO., LTD. Address before: 100083 room 1, International Building, No. 813, Haidian District, Beijing, Zhichun Road Patentee before: Cylix (Beijing) Communication Equipment Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090401 |
|
| CX01 | Expiry of patent term | ||
| DD01 | Delivery of document by public notice |
Addressee: DESIREE COX (BEIJING) COMMUNICATIONS EQUIPMENT CO., LTD. Document name: Notification of Expiration of Patent Right Duration |
|
| DD01 | Delivery of document by public notice |