CN201781497U - Multi-carrier digital companding frequency selecting and shifting device - Google Patents
Multi-carrier digital companding frequency selecting and shifting device Download PDFInfo
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- CN201781497U CN201781497U CN 201020534822 CN201020534822U CN201781497U CN 201781497 U CN201781497 U CN 201781497U CN 201020534822 CN201020534822 CN 201020534822 CN 201020534822 U CN201020534822 U CN 201020534822U CN 201781497 U CN201781497 U CN 201781497U
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Abstract
The utility model relates to a multi-carrier digital companding frequency selecting and shifting device, which consists of a near-end unit and a far-end unit. A downlink includes that the near-end unit receives down signals of a base station, and the down signals are transmitted via a relay antenna after being in filtering, low-noise amplification, digital bandwidth compression and linear amplification; and the far-end unit receives relay signals transmitted by the near-end unit, and the relay signals are in filtering, low-noise processing and digital bandwidth compression and are covered via an service antenna after being in high linear amplification. An uplink includes that a retransmission antenna receives up signals transmitted from a mobile station, and the up signals are transmitted to the near-end unit via the relay antenna after being in filtering, low-noise amplification, digital bandwidth compression and linear amplification; the near-end unit receives relay signals transmitted from the far-end unit, and the relay signals are transmitted to the base station after being in filtering, low-noise processing and digital bandwidth expansion. The multi-carrier digital companding frequency selecting and shifting device adopts an integrated module and a high-reliability digital frequency selecting module, wherein a low-noise amplifier and upper and lower frequency converters are integrated in the integrated module, and the high-reliability digital frequency selecting module has a silencing function. The multi-carrier digital companding frequency selecting and shifting device can be used for eliminating signal dead zones formed due to high mountains, buildings, woods and the like and used for strengthening signal coverage efficiency of expressways and resolving indoor signal coverage and the like.
Description
Technical field
The utility model relates to Wireless Telecom Equipment, particularly a kind of multi-carrier digital companding frequency-selecting shift frequency device.The signal that is applicable to the signal blind zone of formation such as eliminating high mountain, building, the woods and is used to strengthen highway covers efficient, the indoor covering of solution etc.
Background technology
The self information Estate Division has proposed since the project of "Communication with Every Village", target in planning also has at present, improve day by day to the demand of mobile communication in outlying small towns, these local regions are wide, type complexity, telephone traffic low, operator's networking initial stage faces the pressure of high investment, low repayment.Scenic Spot Area is developed in some rural areas successively, and festivals or holidays, telephone traffic was higher.
The 2G mobile communication system is in high band, and space loss is bigger, covers but be fit to carry out sighting distance, then there is deficiency in regional coverages such as hilliness, Duo Shan, forest, the communication frequency resource-constrained, operator must utilize limited frequency resource, to guarantee the sustainable development of radio communication service.The analog companding system obtains applications well in practice.But some weak spots also show especially.Carrier number as support is few relatively, and volume is big, complex structure etc.My company is based on the understanding to wireless communication technology, independent research multi-carrier digital companding frequency-selecting shift frequency device.It is compressed to the 230M frequency range of 3M bandwidth to 900M or 1.8G frequency band signals with digital form at near-end, at far-end the intermediate-freuqncy signal despreading is reduced in the 900M/1.8G frequency range.The signal that can effectively solve areas such as hilliness, Duo Shan, forest covers weak problem.
Summary of the invention
The utility model relates to a kind of multi-carrier digital companding frequency-selecting shift frequency device, but providing a kind of, this device can carry out the system that non-sighting distance covers, this device adopts intermediate frequency as the relay transmission frequency, utilize the diffraction characteristic of 200M repeating signal to walk around obstacles such as mountain peak, fast realize the covering of complex-terrain economically.
The technical solution of the utility model is: device is made up of near-end machine and remote termination;
Described near-end machine is made up of near-end integrated module (1a), descending digital frequency-selecting module (2a), the descending power amplifier of 200M (3a), 200M duplexer (4a), relaying antenna (5a), upstream digital frequency-selecting module (6a), constant-temperature crystal oscillator (7a), power module (8a), power filtering module (9a), monitoring module (10a); Described near-end integrated module (1a) is made up of dielectric duplexer, descending LNA circuit, down link lower frequency changer circuit, down link up-converter circuit, up 200M LNA circuit, up link lower frequency changer circuit, up link up-converter circuit, power management, monitoring unit, Clock management; The BS interface of near-end machine is connected with the downstream signal end of base station, the output of near-end integrated module (1a) is connected with the input of descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a), the descending power amplifier of 200M (3a) respectively, the output of the descending power amplifier of 200M (3a) is connected with the input of 200M duplexer (4a), and the output of 200M duplexer (4a) is connected with an input of relaying antenna (5a), near-end integrated module (1a) respectively; The output of descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a) is connected respectively to the input of near-end integrated module (1a); The output of constant-temperature crystal oscillator (7a) is connected respectively to the crystal oscillator input of near-end integrated module (1a), descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a); Power module (8a), power filtering module (9a), monitoring module (10a) are connected with the respective end of each module respectively;
Described remote termination is made up of far-end integrated module (1b), descending digital frequency-selecting module (2b), descending power amplifier (3b), duplexer (4b), retransmitting antenna (5b), upstream digital frequency-selecting module (6b), relaying antenna (7b), 200M duplexer (8b), power module (9b), constant-temperature crystal oscillator (10b), monitoring module (11b), power-supply filter (12b), up 200M power amplifier (13b); Described far-end integrated module (1b) is made up of descending 200M LNA circuit, down link lower frequency changer circuit, down link up-converter circuit, up LNA circuit, up link lower frequency changer circuit, up link up-converter circuit, power management, monitoring unit, Clock management; The BS interface of remote termination is connected with relaying antenna (7b), the output of 200M duplexer (8b) is connected with the input of far-end integrated module (1b), the output of far-end integrated module (1b) is connected with the input of descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b), descending power amplifier (3b), up 200M power amplifier (13b) respectively, the output of descending power amplifier (3b) is connected with the input of duplexer (4b), and the output of duplexer (4b) is connected with the input of retransmitting antenna, far-end integrated module (1b); Descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b) are connected respectively to the input of far-end integrated module (1b); The output of constant-temperature crystal oscillator (11b) is connected respectively to the crystal oscillator input of far-end integrated module (1b), descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b); Power module (9a), power filtering module (12b), monitoring module (11b) are connected with the respective end of each module respectively; The output of up 200M power amplifier (13b) is connected with the input of 200M duplexer (8b).
The mode that the BS interface of near-end machine is connected with the downstream signal end of base station is for directly being coupled or wireless coupling.
Descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a), descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b) are with a kind of digital frequency-selecting modular circuit, and it is made up of filter circuit, adjustable gain amplifying circuit, adc circuit, DAC circuit and FPGA, Clock management, power management, monitoring unit.
The utility model multi-carrier digital companding frequency-selecting shift frequency device adopts intermediate frequency as the relay transmission frequency, utilizes the diffraction characteristic of 200M repeating signal to walk around obstacles such as mountain peak, fast realizes the covering of complex-terrain economically.This device has higher integrated level, and digitized processing is adopted in frequency-selecting, and low noise cancellation circuit and shift frequency circuit have adopted integrated module, thereby make that this device volume is littler, and reliability is stronger, more utilizes installing and using of actual engineering.
Description of drawings
Fig. 1 is the utility model design multi-carrier digital companding frequency-selecting shift frequency device near-end machine principle framework figure.
Fig. 2 is the utility model design multi-carrier digital companding frequency-selecting shift frequency device remote termination principle framework figure.
Fig. 3 is the utility model design multi-carrier digital companding frequency-selecting shift frequency device near-end integrated module frame diagram.
Fig. 4 is the utility model design multi-carrier digital companding frequency-selecting shift frequency device far-end integrated module frame diagram.
Fig. 5 is the utility model design multi-carrier digital companding frequency-selecting shift frequency device digital frequency-selecting module frame figure.
Embodiment
As shown in figures 1 and 3, described near-end machine is made up of near-end integrated module (1a), descending digital frequency-selecting module (2a), the descending power amplifier of 200M (3a), 200M duplexer (4a), relaying antenna (5a), upstream digital frequency-selecting module (6a), constant-temperature crystal oscillator (7a), power module (8a), power filtering module (9a), monitoring module (10a); Described near-end integrated module (1a) is made up of dielectric duplexer, descending LNA circuit, down link lower frequency changer circuit, down link up-converter circuit, up 200M LNA circuit, up link lower frequency changer circuit, up link up-converter circuit, power management, monitoring unit, Clock management; The BS interface of near-end machine is connected with the downstream signal end of base station, the output of near-end integrated module (1a) is connected with the input of descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a), the descending power amplifier of 200M (3a) respectively, the output of the descending power amplifier of 200M (3a) is connected with the input of 200M duplexer (4a), and the output of 200M duplexer (4a) is connected with an input of relaying antenna (5a), near-end integrated module (1a) respectively; The output of descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a) is connected respectively to the input of near-end integrated module (1a); The output of constant-temperature crystal oscillator (7a) is connected respectively to the crystal oscillator input of near-end integrated module (1a), descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a); Power module (8a), power filtering module (9a), monitoring module (10a) are connected with the respective end of each module respectively;
As Fig. 2 and shown in Figure 4, described remote termination is made up of far-end integrated module (1b), descending digital frequency-selecting module (2b), descending power amplifier (3b), duplexer (4b), retransmitting antenna (5b), upstream digital frequency-selecting module (6b), relaying antenna (7b), 200M duplexer (8b), power module (9b), constant-temperature crystal oscillator (10b), monitoring module (11b), power-supply filter (12b), up 200M power amplifier (13b); Described far-end integrated module (1b) is made up of descending 200M LNA circuit, down link lower frequency changer circuit, down link up-converter circuit, up LNA circuit, up link lower frequency changer circuit, up link up-converter circuit, power management, monitoring unit, Clock management; The BS interface of remote termination is connected with relaying antenna (7b), the output of 200M duplexer (8b) is connected with the input of far-end integrated module (1b), the output of far-end integrated module (1b) is connected with the input of descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b), descending power amplifier (3b), up 200M power amplifier (13b) respectively, the output of descending power amplifier (3b) is connected with the input of duplexer (4b), and the output of duplexer (4b) is connected with the input of retransmitting antenna, far-end integrated module (1b); Descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b) are connected respectively to the input of far-end integrated module (1b); The output of constant-temperature crystal oscillator (11b) is connected respectively to the crystal oscillator input of far-end integrated module (1b), descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b); Power module (9a), power filtering module (12b), monitoring module (11b) are connected with the respective end of each module respectively; The output of up 200M power amplifier (13b) is connected with the input of 200M duplexer (8b).Referring to illustrated in figures 1 and 2.
The operation principle of down link is: the near-end machine receives the downstream signal of base station, after near-end integrated module (1a) filtering, low noise amplification, down-conversion, enter digital frequency-selecting module (2a) and carry out the ADC sampling, after the Digital Signal Processing, the DAC digital intermediate frequency is exported to integrated module (1a), in integrated module (1a), up-convert to 230M frequency range radio frequency, amplify after 200M duplexer (4a) by relaying antenna (5a) emission, carries out relay transmission by descending 200M power amplifier module (3a).After the BS interface of device remote termination receives downstream signal by relaying antenna (7b), earlier through behind the 200M duplexer (8b), access to plant remote termination collection low noise amplifier, last low-converter is down-converted to intermediate frequency in the integrated module (1b) of one, export to descending digital frequency-selecting module (2b) then and carry out the ADC sampling, after the Digital Signal Processing, the DAC digital intermediate frequency is exported to integrated module (1b), in integrated module (1b), up-convert to the band downlink radio frequency, amplify after duplexer (4b) by retransmitting antenna (5b) emission, covers signal blind zone by descending power amplifier module (3b).
Also multi-carrier digital companding frequency-selecting shift frequency device is compressed to the 230M frequency range of 3M bandwidth or 4M bandwidth to 900M or 1.8G frequency band signals with digital form at near-end in the down link, the intermediate-freuqncy signal despreading is reduced in the 900M/1.8G frequency range at far-end.
The operation principle of up link is: after the radiofrequency signal that receives from remote termination retransmitting antenna (5b) is passed through duplexer (4b) equally, (1b) is down-converted to intermediate frequency by integrated module, export to upstream digital frequency-selecting module (6b) then and carry out the ADC sampling, after the Digital Signal Processing, the DAC digital intermediate frequency is exported to integrated module (1b), in integrated module (1b), up-convert to up 220M frequency range radio frequency, behind 200M duplexer (8b), by relaying antenna (7b) emission, carry out relay transmission.After the 220M signal that receives from relaying antenna (5a) passes through 200M duplexer (4a) equally, (1a) is down-converted to intermediate frequency by integrated module, export to upstream digital frequency-selecting module (6a) then and carry out the ADC sampling, after the Digital Signal Processing, the DAC digital intermediate frequency is exported to integrated module (1a), in integrated module (1a), up-convert to the uplink band radio frequency, be sent to the base station again and go.
Also multi-carrier digital companding frequency-selecting shift frequency device is compressed to the 230M frequency range of 3M bandwidth or 4M bandwidth to 900M or 1.8G frequency band signals with digital form at near-end in the up link, the intermediate-freuqncy signal despreading is reduced in the 900M/1.8G frequency range at far-end.
Referring to shown in Figure 3, the machine integrated module of near-end comprises LNA partial circuit, upconverter partial circuit, low-converter partial circuit and gain amplifier section circuit, dielectric duplexer five parts.Downstream signal carries out filtering through dielectric duplexer earlier in the machine integrated module of near-end, enter the downlink radio-frequency signal low noise circuit afterwards and carry out the low noise amplification, enter lower frequency changer circuit then downlink radio-frequency signal is down-converted to intermediate-freuqncy signal, then send digital frequency-selecting module (1a) to and handle, reenter the machine integrated module up-converter circuit of near-end by the intermediate-freuqncy signal of digital frequency-selecting module (1a) output intermediate-freuqncy signal is upconverted to descending 200M radiofrequency signal.Up 200M radiofrequency signal is introduced into up radiofrequency signal low noise circuit and carries out low noise and amplify in the machine integrated module of near-end, enter lower frequency changer circuit then up radiofrequency signal is down-converted to intermediate-freuqncy signal, then sending digital frequency-selecting module (6a) to handles, the up-converter circuit that the intermediate-freuqncy signal of being exported by digital frequency-selecting module (6a) reenters in the machine integrated module of near-end upconverts to up 200M radiofrequency signal to intermediate-freuqncy signal, carries out filtering through dielectric duplexer afterwards.
Referring to shown in Figure 4, the remote termination integrated module comprises LNA partial circuit, upconverter partial circuit, low-converter partial circuit and gain amplifier section circuit four parts.Downlink radio-frequency signal is introduced into descending 200M radiofrequency signal low noise circuit and carries out low noise and amplify in the remote termination integrated module, enter lower frequency changer circuit then downlink radio-frequency signal is down-converted to intermediate-freuqncy signal, then send digital frequency-selecting module (1b) to and handle, reenter remote termination integrated module up-converter circuit by the intermediate-freuqncy signal of digital frequency-selecting module (1b) output intermediate-freuqncy signal is upconverted to downlink radio-frequency signal.Downstream signal is introduced into the downlink radio-frequency signal low noise circuit and carries out low noise and amplify in the remote termination integrated module, enter lower frequency changer circuit then downlink radio-frequency signal is down-converted to intermediate-freuqncy signal, then send digital frequency-selecting module (6b) to and handle, reenter remote termination integrated module up-converter circuit by the intermediate-freuqncy signal of digital frequency-selecting module (6b) output intermediate-freuqncy signal is upconverted to up 200M radiofrequency signal.
As shown in Figure 5, descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a), descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b) are with a kind of digital frequency-selecting modular circuit, and it is made up of filter circuit, adjustable gain amplifying circuit, adc circuit, DAC circuit and FPGA, Clock management, power management, monitoring unit.This module principle is after intermediate-freuqncy signal enters into the digital frequency-selecting module, the digital frequency-selecting module is carried out the ADC sampling earlier, carry out Digital Signal Processing such as frequency-selecting, filtering by entering FPGA behind the DVGA numeral variable gain amplifier then, output to afterwards after DAC carries out digital-to-analogue conversion and become analog signal, through amplifying back output.
The digital frequency-selecting module has adopted digital filtering technique.Digital filter is a linear time invariant discrete system of digital signal being realized filtering.Its essence is a calculating process, and promptly Shu Ru digital signal sequences changes the Serial No. of output into by specific computing.The linear convolution of two sequences is equivalent to the product of its corresponding frequency spectrum sequence on frequency domain on the time domain.Filtering is exactly the product of the resultant signal spectrum of Fourier transform of filter impulse responses from essence.For the time domain discrete system, its frequency domain characteristic is
Y(e
iω)=X(e
iω).H(e
iω)
X (e wherein
I ω), Y (e
I ω) be respectively the list entries of digital filter and the frequency domain characteristic of output sequence (discrete spectrum), H (e
I ω) be the frequency spectrum of system unit impulse response, i.e. the frequency response of filter.As seen, X (e
I ω) through after the filtering, become X (e
I ω) .H (e
I ω).Therefore, as long as according to the characteristics of input signal spectrum and the purpose of processing signals, select suitable frequency response H (e
I ω), make filtered output Y (e
I ω) satisfy system requirements and get final product.In that this part carries out in the Filtering Processing to digital signal, at first will (reduce and handle frequency and carry out the signal selection) after the radiofrequency signal process analog down that receive, analog if signal is carried out the A/D conversion, through processing such as extraction, filtering signal is become baseband signal then, send into Base-Band Processing then and partly handle output; Be that baseband signal is converted to digital intermediate frequency signal by frequency up-conversion operation such as filtering, interpolation on the other hand, transfer digital intermediate frequency signal to analog intermediate frequency signal by D/A conversion and smothing filtering again, after be transformed to radiofrequency signal after simulation up-conversion and some other processing.The intermediate frequency process part mainly comprises the several sections such as upper and lower frequency-conversion processing, A/D conversion and digital controlled oscillator of data.Wherein Digital Down Convert transducer (DDC) utilizes the low pass filtering extraction that intermediate-freuqncy signal is converted into baseband signal.The processing procedure of Digital Up Convert processor (DUC) opposite with the processing procedure of DDC (also promptly utilizing filtering interpolation that baseband signal is converted into intermediate-freuqncy signal).
Claims (3)
1. a multi-carrier digital companding frequency-selecting shift frequency device is characterized in that: install and be made up of near-end machine and remote termination;
Described near-end machine is made up of near-end integrated module (1a), descending digital frequency-selecting module (2a), the descending power amplifier of 200M (3a), 200M duplexer (4a), relaying antenna (5a), upstream digital frequency-selecting module (6a), constant-temperature crystal oscillator (7a), power module (8a), power filtering module (9a), monitoring module (10a); Described near-end integrated module (1a) is made up of dielectric duplexer, descending LNA circuit, down link lower frequency changer circuit, down link up-converter circuit, up 200M LNA circuit, up link lower frequency changer circuit, up link up-converter circuit, power management, monitoring unit, Clock management; The BS interface of near-end machine is connected with the downstream signal end of base station, the output of near-end integrated module (1a) is connected with the input of descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a), the descending power amplifier of 200M (3a) respectively, the output of the descending power amplifier of 200M (3a) is connected with the input of 200M duplexer (4a), and the output of 200M duplexer (4a) is connected with an input of relaying antenna (5a), near-end integrated module (1a) respectively; The output of descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a) is connected respectively to the input of near-end integrated module (1a); The output of constant-temperature crystal oscillator (7a) is connected respectively to the crystal oscillator input of near-end integrated module (1a), descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a); Power module (8a), power filtering module (9a), monitoring module (10a) are connected with the respective end of each module respectively;
Described remote termination is made up of far-end integrated module (1b), descending digital frequency-selecting module (2b), descending power amplifier (3b), duplexer (4b), retransmitting antenna (5b), upstream digital frequency-selecting module (6b), relaying antenna (7b), 200M duplexer (8b), power module (9b), constant-temperature crystal oscillator (10b), monitoring module (11b), power-supply filter (12b), up 200M power amplifier (13b); Described far-end integrated module (1b) is made up of descending 200M LNA circuit, down link lower frequency changer circuit, down link up-converter circuit, up LNA circuit, up link lower frequency changer circuit, up link up-converter circuit, power management, monitoring unit, Clock management; The BS interface of remote termination is connected with relaying antenna (7b), the output of 200M duplexer (8b) is connected with the input of far-end integrated module (1b), the output of far-end integrated module (1b) is connected with the input of descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b), descending power amplifier (3b), up 200M power amplifier (13b) respectively, the output of descending power amplifier (3b) is connected with the input of duplexer (4b), and the output of duplexer (4b) is connected with the input of retransmitting antenna, far-end integrated module (1b); Descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b) are connected respectively to the input of far-end integrated module (1b); The output of constant-temperature crystal oscillator (11b) is connected respectively to the crystal oscillator input of far-end integrated module (1b), descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b); Power module (9a), power filtering module (12b), monitoring module (11b) are connected with the respective end of each module respectively; The output of up 200M power amplifier (13b) is connected with the input of 200M duplexer (8b).
2. multi-carrier digital companding frequency-selecting shift frequency device according to claim 1 is characterized in that: the mode that the BS interface of near-end machine is connected with the downstream signal end of base station is for directly being coupled or wireless coupling.
3. multi-carrier digital companding frequency-selecting shift frequency device according to claim 1, it is characterized in that: descending digital frequency-selecting module (2a), upstream digital frequency-selecting module (6a), descending digital frequency-selecting module (2b), upstream digital frequency-selecting module (6b) are with a kind of digital frequency-selecting modular circuit, and it is made up of filter circuit, adjustable gain amplifying circuit, adc circuit, DAC circuit and FPGA, Clock management, power management, monitoring unit.
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| CN 201020534822 CN201781497U (en) | 2010-09-19 | 2010-09-19 | Multi-carrier digital companding frequency selecting and shifting device |
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| CN 201020534822 CN201781497U (en) | 2010-09-19 | 2010-09-19 | Multi-carrier digital companding frequency selecting and shifting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103220687A (en) * | 2013-04-11 | 2013-07-24 | 四川邮科通信技术有限公司 | Multi-standard type category 5 cable home-entry covering system |
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2010
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103220687A (en) * | 2013-04-11 | 2013-07-24 | 四川邮科通信技术有限公司 | Multi-standard type category 5 cable home-entry covering system |
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Owner name: CHINA YOUKE COMMUNICATION TECHNOLOGY CO., LTD. Free format text: FORMER NAME: FUJIAN YOUKE COMMUNICATION TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 350001, No. 6, 1, Science Park, Cangshan District, Fujian, Fuzhou Patentee after: China Youke Communication Technology Co., Ltd. Address before: 350001, No. 6, 1, Science Park, Cangshan District, Fujian, Fuzhou Patentee before: Fujian Youke Communication Technology Co., Ltd. |
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