CN201601830U - CDMA digital enclave companding system - Google Patents
CDMA digital enclave companding system Download PDFInfo
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- CN201601830U CN201601830U CN200920246056XU CN200920246056U CN201601830U CN 201601830 U CN201601830 U CN 201601830U CN 200920246056X U CN200920246056X U CN 200920246056XU CN 200920246056 U CN200920246056 U CN 200920246056U CN 201601830 U CN201601830 U CN 201601830U
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- enclave companding
- cdma
- end machine
- digital enclave
- companding
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Abstract
The utility model provides a CDMA digital enclave companding system comprising a CDMA base station, a digital enclave companding near-end machine, at least one digital enclave companding far-end machine and chain transmitting, receiving and relay antennas. The CDMA base station is connected with the digital enclave companding near-end machine through a wireless channel or wire coupling; the digital enclave companding near-end machine is provided with a transmitting relay chain antenna; the receiving end of the digital enclave companding far-end machine is provided with a receiving chain antenna; and a relay chain antenna is arranged between the digital enclave companding near-end machine and the digital enclave companding far-end machine as required. The CDMA digital enclave companding system has the advantages that the CDMA digital enclave companding system has higher noise suppression capacity and higher efficiency overpower protection ability, and more importantly, the system can be applied to a CDMA network.
Description
Technical field
The utility model belongs to the communications field, relates to a kind of enclave companding system, relates in particular to a kind of CDMA numeral enclave companding system.
Background technology
The rural area radio mobile communication utilizes the on-air radio channel to come communication, because radio transmission is subjected to the influence of topography and geomorphology atural object bigger, and the quantity of base station and lay the place and be subjected to certain restriction, therefore in mobile communication network, have many wireless coverages blind area or wireless signal interference range, cause the mobile subscriber can not access, call drop or speech quality reduces.Enclave companding system is one of network and replenishes, and is that companding system in enclave can replace the base station and realize wireless coverage under the outstanding situation of the primary problem that solves and capacity contradiction in covering.
Enclave companding system is a kind of system that carries out long-distance transmissions in the narrower low frequency frequency range of frequency band that the bigger signal of communication of occupied bandwidth is compressed to.It, reduces the signal despreading in former frequency range at far-end working frequency range Signal Compression frequency range outside 1M arrives the band of 4M bandwidth at near-end, carries 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.
Numeral enclave companding is on the technical foundation of original simulation enclave, with wherein downwards the process of compression frequency become digital form by simulation, thereby guaranteed better coverage effect and lower system noise.Numeral enclave companding mainly applies to 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.But there is following deficiency in existing enclave companding system:
1. frequency-selecting realizes weak effect
Existing enclave system class like with simulation frequency-shift and frequency-selective system, realization theory diagram in conjunction with following simulation frequency-shift and frequency-selective device, being multiplied of hardware selected just to mean in order to realize multichannel by existing enclave system, and very difficult assurance of consistency of sound table device, cause consistency of product to be difficult to guarantee.
2. overlay area speech quality is poor
The duplexing filtering of slave unit is to power amplifier output, and equipment all adopts analogue technique, all is very irregular rectangles during filtering, has therefore caused signal noise higher, the problem of area of coverage ubiquity speech quality difference;
The part of core belongs to intermediate frequency shift frequency part in the prior art, 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 cause the compression process error rate to increase owing to the relatively poor selection type of filter in the compression process, thereby bringing the situation of area of coverage speech quality difference.
3. 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, and the noise after the multiple devices stack is big, has seriously limited one of equipment and has dragged use more.
The utility model content
In order to solve the deficiency that prior art exists; the purpose of this utility model is to provide a kind of CDMA numeral enclave companding system; described a kind of CDMA numeral enclave companding system; be to be applied to have higher noise inhibiting ability in the cdma network, the more digital enclave companding system of overpower protection ability.
To achieve these goals, the utility model is achieved through the following technical solutions: described a kind of CDMA numeral enclave companding system comprises that cdma base station, digital enclave companding near-end machine, at least one digital enclave companding remote termination and link emission, reception, relaying antenna form.Described cdma base station links to each other with digital enclave companding near-end machine by wireless channel or wired coupling, described digital enclave companding near-end machine is established emission repeated link antenna mutually, the receiving terminal of described digital enclave companding remote termination is established the reception link antennas, as required, between digital enclave companding near-end machine and digital enclave companding remote termination, establish the repeated link antenna.
Compared with prior art, the utility model has the advantages that: utilize companding technology to solve traditional C DMA network and put, zoom out with tower and solve mountain area or personnel and live and relatively disperse local communication issue, with high frequency waves boil down to low frequency wave, utilize diffraction, the diffracting power of low frequency wave again, carry out overlength distance and cover.
Description of drawings
Fig. 1 is the direct type structural representation of a kind of CDMA numeral enclave companding system described in the utility model;
Fig. 2 is a kind of CDMA numeral described in the utility model enclave companding system radio frequency type structural representation.
Embodiment
Come a kind of CDMA numeral described in the utility model enclave companding system is described in further detail below in conjunction with accompanying drawing and specific embodiment, but conduct is not to restriction of the present utility model.
Embodiment 1: referring to Fig. 1, described a kind of CDMA numeral enclave companding system adopts direct type structure, comprises cdma base station 1, coupler 11, digital enclave companding near-end machine 2, link transmitting antenna 3, link reception antenna 4, digital enclave companding remote termination 5 and transmitting antenna 6.
Wherein, cdma base station 1 is connected with digital enclave companding near-end machine 2 by coupler 11, by feeder line digital enclave companding near-end machine 2 signals being drawn the signal of cat head after by 3 pairs of companding shift frequencies of link transmitting antenna launches, numeral enclave companding remote termination 5 carries out signal by link reception antenna 4 and receives, become the normal bandwidth signal by companding remote termination 5 despreadings of digital enclave then, and logical transmitting antenna 6 covers to the area of coverage 7 excessively.
Wherein, digital enclave companding near-end machine 2 and digital enclave companding remote termination 5 equipment are apart from 5Km, and cdma base station is divided into a sector 8, two sectors 9 and three sectors 10 with required overlay area.
Embodiment 2: referring to Fig. 2, described a kind of CDMA numeral enclave companding system adopts radio frequency type structure, comprises cdma base station 1, reception antenna 12, digital enclave companding near-end machine 2, link transmitting antenna 3, link reception antenna 4, digital enclave companding remote termination 5 and transmitting antenna 6.
Wherein, cdma base station 1 is communicated by letter with digital enclave companding near-end machine 2 by reception antenna 12, and the other technologies scheme is identical with embodiment 1.
Claims (3)
1. CDMA numeral enclave companding system, comprise digital enclave companding near-end machine, at least one digital enclave companding remote termination, link emission, reception, relaying antenna and transmitting antenna, it is characterized in that: described a kind of CDMA numeral enclave companding system also comprises cdma base station, wherein, described cdma base station links to each other with digital enclave companding near-end machine, described digital enclave companding near-end machine is established the link transmitting antenna, and described digital enclave companding remote termination is established link and received sky and transmitting antenna.
2. a kind of CDMA numeral according to claim 1 enclave companding system, it is characterized in that: described cdma base station links to each other with described digital enclave companding near-end machine by wireless channel or coupler.
3. a kind of CDMA numeral according to claim 2 enclave companding system, it is characterized in that: described cdma base station links to each other with described digital enclave companding near-end machine by wireless channel, and described digital enclave companding near-end machine receiving terminal is established reception antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920246056XU CN201601830U (en) | 2009-09-27 | 2009-09-27 | CDMA digital enclave companding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920246056XU CN201601830U (en) | 2009-09-27 | 2009-09-27 | CDMA digital enclave companding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201601830U true CN201601830U (en) | 2010-10-06 |
Family
ID=42812888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920246056XU Expired - Lifetime CN201601830U (en) | 2009-09-27 | 2009-09-27 | CDMA digital enclave companding system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201601830U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188696A (en) * | 2011-12-28 | 2013-07-03 | 成都芯通科技股份有限公司 | Digital enclave companding system and time delay synchronizing method thereof |
-
2009
- 2009-09-27 CN CN200920246056XU patent/CN201601830U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188696A (en) * | 2011-12-28 | 2013-07-03 | 成都芯通科技股份有限公司 | Digital enclave companding system and time delay synchronizing method thereof |
| CN103188696B (en) * | 2011-12-28 | 2015-10-21 | 成都芯通科技股份有限公司 | A kind of digital enclave companding system and Delay Synchronization method thereof |
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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) COMMUNICATIONS 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. 801, Haidian District, Beijing, Zhichun Road Patentee before: Cylix (Beijing) Communication Equipment Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101006 |
|
| 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 |