CN202121587U - Companding remote stretch system for energy-saving multicarrier digital optical fiber - Google Patents
Companding remote stretch system for energy-saving multicarrier digital optical fiber Download PDFInfo
- Publication number
- CN202121587U CN202121587U CN2011202575109U CN201120257510U CN202121587U CN 202121587 U CN202121587 U CN 202121587U CN 2011202575109 U CN2011202575109 U CN 2011202575109U CN 201120257510 U CN201120257510 U CN 201120257510U CN 202121587 U CN202121587 U CN 202121587U
- Authority
- CN
- China
- Prior art keywords
- module
- unit
- frequency
- digital
- descending
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y02B60/50—
Abstract
The utility model discloses a companding remote stretch system for energy-saving multicarrier digital optical fiber, comprising an access unit, a relay unit and a stretching cover unit, wherein one end of the access unit is coupled with a base station or a base station remote system; the other end of the access unit is connected with the relay unit through optical fiber; the other end of the relay unit is provided with a 900 M retransmission antenna and a 200 M relay antenna; one end of the stretching cover unit is provided with a relay antenna for carrying out wireless communication with the 200 M relay antenna in the relay unit; and the other end of the stretching cover unit is provided with a retransmission antenna for retransmitting the amplified downlink radio-frequency signal to a communication blind district. The companding remote stretch system has the advantages of stable performance, less influence on network, environmental protection and energy conservation, long coverage distance, large coverage area, low price and the like, and can remove signal blind district caused by high mountains, buildings, woods and the like, and can enhance signal coverage efficiency of expressways and solve the problem for covering compact districts in cities.
Description
Technical field
The utility model relates to wireless communication technology field, is specifically related to a kind ofly utilize optical fiber and arrowband repeating signal to carry out signal transmission to cover efficient, solve the remote stretch system of energy-saving multi-carrier digital optical fiber companding of the covering etc. in urban compact district in order to the signal blind zone eliminating high mountain, building, the woods etc. and form and the signal that strengthens highway.
Background technology
The self information Estate Division has proposed since the project of "Communication with Every Village", and the target of the construction of communication network in planning also has at present.In the suburb, particularly the rural area generally adopts the simulation repeater to cover at mobile network's first stage of construction, and these local mobile subscribers are more and more now, and are also increasingly high to the communication quality requirement, because simulation repeater job insecurity, the user often complains.And a large amount of employings of simulation repeater, also easily the base station is produced and disturb, influence network index.
In addition, the 2G GSM is in high band, and space loss is bigger; Cover 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.Existing companding system obtains applications well on the market in reality.But some weak spots also show especially.Carrier number as supporting is few relatively, and volume is big, complex structure, and coverage distance is short, and area coverage is little, and power consumption causes the easy damage of equipment etc. greatly.
For this reason, the utility model provides a kind of effective solution that easily the remote degree of depth of signal is covered.
Summary of the invention
The problem that the utility model will solve is: how to provide a kind of energy-saving multi-carrier digital optical fiber companding remote stretch system; Advantage such as the remote stretch system of this energy-saving multi-carrier digital optical fiber companding has stable performance,, environmental protection and energy saving little to web influence, coverage distance is far away, area coverage is big, coverage effect is good, price is relatively cheap; Be used for zooming out at a distance; The signal blind zone that high mountain, building, the woods etc. form can be eliminated, and the signal covering efficient of highway, the problems such as covering in solution urban compact district can be strengthened.
For reaching the foregoing invention purpose, the technical scheme that the utility model adopted is: provide a kind of energy-saving multi-carrier digital optical fiber companding remote stretch system, it is characterized in that: be made up of access unit, TU Trunk Unit and extension capping unit; Said access unit one end and base station or base station zoom out system are coupled, and the other end is connected with TU Trunk Unit through optical fiber; The said TU Trunk Unit other end is provided with the 900M retransmitting antenna and the 200M relaying antenna that is used for communicating with the extension capping unit that is used for downlink radio-frequency signal is transmitted into the area of coverage; Said extension capping unit one end is provided with the relaying antenna that is used for carrying out with TU Trunk Unit 200M relaying antenna radio communication, and the other end is provided with the downlink radio-frequency signal that is used for after amplifying and resends the retransmitting antenna to communication blind district.
Said access unit comprises access unit integrated module, power module, power-supply filter, constant-temperature crystal oscillator, monitoring unit, access unit digital intermediate frequency plate and digital light module; Said power module is electrically connected with access unit integrated module, constant-temperature crystal oscillator, monitoring unit, access unit digital intermediate frequency plate and digital light module respectively through power-supply filter; Said constant-temperature crystal oscillator is connected with the access unit integrated module with monitoring unit one end, and the other end is connected with access unit digital intermediate frequency plate; Two-way communication forms up link and down link respectively between said access unit integrated module and the access unit digital intermediate frequency plate; Said access unit digital intermediate frequency plate is connected with the digital light module.
Said access unit integrated module is made up of dielectric duplexer, up frequency changer circuit and descending frequency changer circuit; Said up frequency changer circuit and dielectric duplexer are connected to form up link, and dielectric duplexer and descending frequency changer circuit are connected to form down link; Said access unit digital intermediate frequency plate is provided with ADC, DAC, digital signal processing module and photoelectric conversion module; Said ADC, digital signal processing module and photoelectric conversion module connect and compose down link in order, and photoelectric conversion module, digital signal processing module and DAC connect and compose up link in order.
Said TU Trunk Unit comprises TU Trunk Unit digital intermediate frequency plate, 900M frequency conversion integrated module, 200M frequency conversion integrated module, power module, power-supply filter, TU Trunk Unit monitoring unit, descending 900M power amplifier, descending 200M power amplifier, 900M duplexer, 200M duplexer, 900M retransmitting antenna and 200M relaying antenna; Said 900M frequency conversion integrated module is connected with the 900M duplexer with TU Trunk Unit digital intermediate frequency plate, TU Trunk Unit monitoring unit, descending 900M power amplifier respectively, and 200M frequency conversion integrated module is connected with the 200M duplexer with TU Trunk Unit digital intermediate frequency plate, TU Trunk Unit monitoring unit, descending 200M power amplifier respectively; Said power module is electrically connected with TU Trunk Unit digital intermediate frequency plate, 900M frequency conversion integrated module, 200M frequency conversion integrated module, TU Trunk Unit monitoring unit, descending 900M power amplifier, descending 200M power amplifier, 900M duplexer and 200M duplexer respectively through power-supply filter; Said TU Trunk Unit digital intermediate frequency plate, 900M frequency conversion integrated module, descending 900M power amplifier and 900M duplexer connect and compose the 900M down link in order, and 900M duplexer, 900M frequency conversion integrated module and TU Trunk Unit digital intermediate frequency plate connect and compose the 900M up link in order; Said TU Trunk Unit digital intermediate frequency plate, 200M frequency conversion integrated module, descending 200M power amplifier and 200M duplexer connect and compose the 200M down link in order, and 200M duplexer, 200M frequency conversion integrated module and TU Trunk Unit digital intermediate frequency plate connect and compose the 200M up link in order.
Said 900M frequency conversion integrated module is made up of up frequency changer circuit, the low noise cancellation circuit of up 900M and descending frequency changer circuit; Low noise cancellation circuit of said up 900M and the up frequency changer circuit formation up link that is serially connected; Said 200M frequency conversion integrated module is made up of up frequency changer circuit, the low noise cancellation circuit of up 200M and descending frequency changer circuit; Low noise cancellation circuit of said up 200M and the up frequency changer circuit formation up link that is serially connected.
Said extension capping unit comprises relaying antenna, 200M duplexer, up 200M power amplifier, extends capping unit integrated module, descending digital frequency-selecting module, constant-temperature crystal oscillator, upstream digital frequency-selecting module, monitoring module, power module, power-supply filter, descending 900M power amplifier, duplexer and retransmitting antenna; Said 200M duplexer one end is connected with the relaying antenna, and the other end is connected with extension capping unit integrated module; The said extension capping unit integrated module other end is connected with duplexer with descending digital frequency-selecting module, constant-temperature crystal oscillator, upstream digital frequency-selecting module, descending 900M power amplifier respectively; Said up 200M power amplifier is connected with the 200M duplexer with extension capping unit integrated module respectively; Said constant-temperature crystal oscillator is connected with upstream digital frequency-selecting module with descending digital frequency-selecting module respectively; Said power module is connected with duplexer with 200M duplexer, up 200M power amplifier, extension capping unit integrated module, descending digital frequency-selecting module, constant-temperature crystal oscillator, upstream digital frequency-selecting module, monitoring module, descending 900M power amplifier respectively through power-supply filter; Said 200M duplexer, extension capping unit integrated module, descending 900M power amplifier and duplexer connect and compose down link in order, and duplexer, extension capping unit integrated module, up 200M power amplifier and 200M duplexer connect and compose up link in order.
Said extension capping unit integrated module is made up of descending 200M LNA circuit, the descending frequency changer circuit of down link, the up frequency changer circuit of down link, power management module, monitoring unit, Clock management module, up link up-converter circuit, up link lower frequency changer circuit and up LNA circuit.
In sum; Advantage such as the remote stretch system of energy-saving multi-carrier digital optical fiber companding that the utility model provided has stable performance,, environmental protection and energy saving little to web influence, coverage distance is far away, area coverage is big, coverage effect is good, price is relatively cheap; Be used for zooming out at a distance; The signal blind zone that high mountain, building, the woods etc. form can be eliminated, and the signal covering efficient of highway, the problems such as covering in solution urban compact district can be strengthened.
Description of drawings
Fig. 1 is the remote stretch system access unit of energy-saving multi-carrier digital optical fiber companding principle framework figure.
Fig. 2 is the remote stretch system TU Trunk Unit of energy-saving multi-carrier digital optical fiber companding principle framework figure.
Fig. 3 is that the remote stretch system of energy-saving multi-carrier digital optical fiber companding extends capping unit principle framework figure.
Fig. 4 is the remote stretch system access unit of an energy-saving multi-carrier digital optical fiber companding integrated module frame diagram.
Fig. 5 is the remote stretch system TU Trunk Unit of an energy-saving multi-carrier digital optical fiber companding 900M frequency conversion integrated module frame diagram.
Fig. 6 is the remote stretch system TU Trunk Unit of an energy-saving multi-carrier digital optical fiber companding 200M frequency conversion integrated module frame diagram.
Fig. 7 is that the remote stretch system of energy-saving multi-carrier digital optical fiber companding extends capping unit integrated module frame diagram.
Fig. 8 is that the remote stretch system power amplifier of energy-saving multi-carrier digital optical fiber companding adopts digital pre-distortion technology principle framework figure.
Embodiment
The remote stretch system of energy-saving multi-carrier digital optical fiber companding that this patent provided after access unit carries out Digital Signal Processing to the 900M radiofrequency signal, be sent to through optical fiber TU Trunk Unit carry out signal a little less than the covering of district, blind area; And in TU Trunk Unit, carry out relay transmission to frequency band with the 200M frequency range that digital form is compressed to the arrowband; Utilize the good diffraction transmission characteristic of 200M signal; The signal that carries out farther distance transmits, and reduces the intermediate-freuqncy signal despreading from the digital processing mode again at the extension capped end in the 900M frequency range blind area to be covered.
The remote stretch system of this energy-saving multi-carrier digital optical fiber companding is made up of access unit, TU Trunk Unit and extension capping unit; Wherein, the operation principle of each unit is following:
Access unit is behind base station (perhaps base station zoom out system) coupling downlink radio-frequency signal; Behind the dielectric duplexer of access unit integrated module; Descending frequency changer circuit by the access unit integrated module is converted to descending intermediate-freuqncy signal; Descending intermediate-freuqncy signal outputs to access unit digital intermediate frequency plate and carries out ADC sampling, Digital Signal Processing and light/electricity conversion, and the downlink optical signal after light/electricity conversion is sent to TU Trunk Unit by the digital light module through optical fiber.The uplink optical signal that sends from TU Trunk Unit; Through after entering into access unit digital intermediate frequency plate after the digital light module and carrying out light/electric conversion, Digital Signal Processing, DAC sampling; Output to the access unit integrated module; After being converted to up radiofrequency signal by the up frequency changer circuit of access unit integrated module, turn back to base-station interface through dielectric duplexer.
After TU Trunk Unit receives the downlink optical signal that transmits from access unit; Carry out light/electric conversion, Digital Signal Processing, DAC sampling through entering into TU Trunk Unit digital intermediate frequency plate after the digital light module; The descending intermediate-freuqncy signal of output enters into 900M frequency conversion integrated module; By the descending frequency changer circuit frequency conversion of 900M frequency conversion integrated module is downlink radio-frequency signal after descending 900M digital pre-distorting power amplifier amplifies, and the downlink radio-frequency signal after the amplification is transmitted into the area of coverage through the 900M retransmitting antenna behind the 900M duplexer.The up 900M radiofrequency signal that sends from the relaying cell footprint; Behind the 900M duplexer; Be converted to up intermediate-freuqncy signal by the up low noise circuit amplification of 900M frequency conversion integrated module, up frequency changer circuit; Enter into TU Trunk Unit digital intermediate frequency plate then and carry out ADC sampling, Digital Signal Processing and light/electricity conversion, the uplink optical signal after light/electricity conversion is sent to access unit by the digital light module through optical fiber.
After TU Trunk Unit receives the downlink optical signal that transmits from system's access unit; Through after entering into TU Trunk Unit digital intermediate frequency plate after the digital light module and carrying out light/electric conversion, Digital Signal Processing, digital band compression, DAC sampling; The descending narrowband intermediate frequency signal of output enters into 200M frequency conversion integrated module; By the descending frequency changer circuit frequency conversion of 200M frequency conversion integrated module is that descending 200M relaying radiofrequency signal is after the amplification of descending 200M digital pre-distorting power amplifier; Descending 200M relaying radiofrequency signal after the amplification through the emission of relaying antenna, is carried out relay transmission behind the 200M duplexer.From extending the up 200M relaying radiofrequency signal that capping unit sends; Behind the 200M duplexer; Be converted to up intermediate-freuqncy signal by the up low noise circuit amplification of 200M frequency conversion integrated module, up frequency changer circuit; Enter into TU Trunk Unit digital intermediate frequency plate then and carry out ADC sampling, Digital Signal Processing, digital band expansion and light/electricity conversion, the uplink optical signal after light/electricity conversion is sent to access unit by the digital light module through optical fiber.
After extending capping unit and receiving the descending 200M relaying radiofrequency signal that TU Trunk Unit sends over through the relaying antenna; Earlier through behind the 200M duplexer; Descending 200M low noise circuit through extending the capping unit integrated module amplifies, frequency changer circuit is down-converted to intermediate frequency; After exporting to descending digital frequency-selecting module then and carrying out ADC sampling, Digital Signal Processing, digital band expansion, DAC sampling; Output to integrated module once more; In extending the capping unit integrated module, intermediate-freuqncy signal is up-converted to the 900M downlink radio-frequency signal, amplify after the 900M duplexer is launched by retransmitting antenna through descending digital pre-distorting power amplifier module at last, signal blind zone is covered.After the up radiofrequency signal that receives from retransmitting antenna is passed through the 900M duplexer equally; The up 900M low noise circuit of capping unit integrated module amplifies by extending, frequency changer circuit is down-converted to intermediate frequency; After exporting to upstream digital frequency-selecting module then and carrying out ADC sampling, Digital Signal Processing, digital band compression, DAC sampling; Output to once more and extend the capping unit integrated module, in extending the capping unit integrated module, up-convert to up 200M frequency range radio frequency, behind the 200M duplexer; By the emission of relaying antenna, carry out relay transmission.
Descending 900M power amplifier of above-mentioned TU Trunk Unit and the descending 200M power amplifier of TU Trunk Unit and the descending 900M power amplifier of extension capping unit have all adopted digital pre-distortion technology with the up 200M power amplifier of extension capping unit; Effectively reduced power consumption; Improve the efficient of power amplifier, made whole system efficient energy-saving more.
Describe in detail below in conjunction with the embodiment of accompanying drawing the utility model:
It is as depicted in figs. 1 and 2,
Down link 1 is: access unit is (perhaps base station zoom out system) coupling downlink radio-frequency signal from the base station; Be converted to descending intermediate-freuqncy signal by descending frequency changer circuit behind the dielectric duplexer through the access unit integrated module; Descending intermediate-freuqncy signal outputs to access unit digital intermediate frequency plate and carries out ADC sampling, Digital Signal Processing and light/electricity conversion, and the downlink optical signal after light/electricity conversion is sent to TU Trunk Unit by the digital light module through optical fiber.After TU Trunk Unit receives the downlink optical signal that transmits from access unit; Enter into TU Trunk Unit digital intermediate frequency plate through the digital light module and carry out light/electric conversion, Digital Signal Processing, DAC sampling; The descending intermediate-freuqncy signal of DAC sampling back output enters into 900M frequency conversion integrated module; By the descending frequency changer circuit frequency conversion of 900M frequency conversion integrated module is downlink radio-frequency signal after descending 900M digital pre-distorting power amplifier amplifies, and the downlink radio-frequency signal after the amplification is transmitted into the area of coverage through the 900M retransmitting antenna behind the 900M duplexer.
Up link 1 is: the up 900M radiofrequency signal that sends from the relaying cell footprint; Behind the 900M duplexer; Be converted to up intermediate-freuqncy signal by the up low noise circuit amplification of 900M frequency conversion integrated module, up frequency changer circuit; Enter into TU Trunk Unit digital intermediate frequency plate then and carry out ADC sampling, Digital Signal Processing and light/electricity conversion, the uplink optical signal after light/electricity conversion is sent to access unit by the digital light module through optical fiber.After access unit receives the uplink optical signal that TU Trunk Unit sends; Through after entering into access unit digital intermediate frequency plate after the digital light module and carrying out light/electric conversion, Digital Signal Processing, DAC sampling; Output to the access unit integrated module; After being converted to up radiofrequency signal by the up frequency changer circuit of access unit integrated module, turn back to base-station interface through dielectric duplexer.
Like Fig. 1, Fig. 2 and shown in Figure 3,
Down link 2 is: access unit is (perhaps base station zoom out system) coupling downlink radio-frequency signal from the base station; Be converted to descending intermediate-freuqncy signal by descending frequency changer circuit behind the dielectric duplexer through the access unit integrated module; Descending intermediate-freuqncy signal outputs to access unit digital intermediate frequency plate and carries out ADC sampling, Digital Signal Processing and light/electricity conversion, and the downlink optical signal after light/electricity conversion is sent to TU Trunk Unit by the digital light module through optical fiber.After TU Trunk Unit receives the downlink optical signal that transmits from access unit; Enter into TU Trunk Unit digital intermediate frequency plate through the digital light module and carry out light/electric conversion, Digital Signal Processing, DAC sampling; The descending narrowband intermediate frequency signal of DAC sampling back output enters into 200M frequency conversion integrated module; By the descending frequency changer circuit frequency conversion of 200M frequency conversion integrated module is that descending 200M relaying radiofrequency signal is after the amplification of descending 200M digital pre-distorting power amplifier; Descending 200M relaying radiofrequency signal after the amplification through the emission of relaying antenna, is carried out relay transmission behind the 200M duplexer.After extending capping unit and receiving the descending 200M relaying radiofrequency signal that TU Trunk Unit sends over through the relaying antenna; Earlier through behind the 200M duplexer; The descending 200M low noise circuit amplification, the frequency changer circuit that extend the capping unit integrated module through system are down-converted to intermediate frequency; After exporting to descending digital frequency-selecting module then and carrying out ADC sampling, Digital Signal Processing, digital band expansion, DAC sampling; Output to once more and extend the capping unit integrated module; In extending the capping unit integrated module, intermediate-freuqncy signal is up-converted to the 900M downlink radio-frequency signal, amplify after the 900M duplexer is launched by retransmitting antenna through descending digital pre-distorting power amplifier module at last, signal blind zone is covered.
Up link 2 is: from extending after up radiofrequency signal that the capping unit retransmitting antenna receives passes through the 900M duplexer equally; The up 900M low noise circuit of capping unit integrated module amplifies by extending, frequency changer circuit is down-converted to intermediate frequency; After exporting to upstream digital frequency-selecting module then and carrying out ADC sampling, Digital Signal Processing, digital band compression, DAC sampling; Output to once more and extend the capping unit integrated module, in extending the capping unit integrated module, up-convert to up 200M frequency range radio frequency, behind the 200M duplexer; By the emission of relaying antenna, carry out relay transmission.TU Trunk Unit receives from extending the up 200M relaying radiofrequency signal that capping unit sends; Behind the 200M duplexer; Be converted to up intermediate-freuqncy signal by the up low noise circuit amplification of 200M frequency conversion integrated module, up frequency changer circuit; Enter into TU Trunk Unit digital intermediate frequency plate then and carry out ADC sampling, Digital Signal Processing, digital band expansion and light/electricity conversion, the uplink optical signal after light/electricity conversion is sent to access unit by the digital light module through optical fiber.After access unit receives the uplink optical signal that TU Trunk Unit sends; Through after entering into access unit digital intermediate frequency plate after the digital light module and carrying out light/electric conversion, Digital Signal Processing, DAC sampling; Output to the access unit integrated module; After being converted to up radiofrequency signal by the up frequency changer circuit of access unit integrated module, turn back to base-station interface through dielectric duplexer.
As shown in Figure 4, the access unit integrated module comprises up link converter circuit, down link converter circuit, dielectric duplexer three parts.Downstream signal carries out filtering through dielectric duplexer earlier in the access unit integrated module; Get into the down link frequency changer circuit afterwards and be down-converted to intermediate-freuqncy signal to downlink radio-frequency signal, output to access unit digital intermediate frequency plate by the access unit integrated module at last and carry out ADC sampling, Digital Signal Processing, light/electricity conversion.After the up intermediate-freuqncy signal that access unit digital intermediate frequency plate sends gets into the access unit integrated module; Earlier the up link frequency changer circuit by the access unit integrated module upconverts to up 900M radiofrequency signal to up intermediate-freuqncy signal, after dielectric duplexer carry out turning back to base-station interface after the filtering.
As shown in Figure 5, TU Trunk Unit 900M frequency conversion integrated module comprises up link converter circuit, down link converter circuit, low noise cancellation circuit three parts of up 900M.The descending intermediate-freuqncy signal of TU Trunk Unit digital intermediate frequency plate output gets in the TU Trunk Unit 900M frequency conversion integrated module; Down link frequency changer circuit through 900M frequency conversion integrated module upconverts to descending 900M radiofrequency signal earlier, exports to the 900M power amplifier then and amplifies.After the up 900M radiofrequency signal that the TU Trunk Unit retransmitting antenna receives enters into TU Trunk Unit 900M frequency conversion integrated module; Carrying out low noise through up 900M low noise circuit earlier amplifies; Be down-converted to up intermediate-freuqncy signal to up 900M radiofrequency signal by the up link frequency changer circuit then, output to TU Trunk Unit digital intermediate frequency plate at last and carry out ADC sampling, Digital Signal Processing, light/electricity conversion.
As shown in Figure 6, TU Trunk Unit 200M frequency conversion integrated module comprises up link converter circuit, down link converter circuit, low noise cancellation circuit three parts of up 200M.The descending narrowband intermediate frequency signal of TU Trunk Unit digital intermediate frequency plate output gets in the TU Trunk Unit 200M frequency conversion integrated module; Down link frequency changer circuit through 200M frequency conversion integrated module upconverts to descending 200M radiofrequency signal earlier, exports to descending 200M power amplifier then and amplifies.After the up 200M radiofrequency signal that TU Trunk Unit relaying antenna receives enters into TU Trunk Unit 200M frequency conversion integrated module; Carrying out low noise through up 200M low noise circuit earlier amplifies; Be down-converted to up intermediate-freuqncy signal to up 200M repeating signal by the up link frequency changer circuit then, output to TU Trunk Unit digital intermediate frequency plate at last and carry out ADC sampling, Digital Signal Processing, digital band expansion, light/electricity conversion.
As shown in Figure 7, extend the capping unit integrated module and comprise LNA circuit, up-converter circuits, down-converter circuit and gain amplifying 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 extending the capping unit integrated module; Be down-converted to intermediate-freuqncy signal through lower frequency changer circuit then; Then sending descending digital frequency-selecting module to handles; Intermediate-freuqncy signal after the processing gets into again extends in the capping unit integrated module, upconverts to downlink radio-frequency signal to intermediate-freuqncy signal by up-converter circuit, outputs to descending 900M power amplifier and amplifies.Up radiofrequency signal is introduced into up radiofrequency signal low noise circuit and carries out low noise and amplify in extending the capping unit integrated module; Be down-converted to intermediate-freuqncy signal to up radiofrequency signal through lower frequency changer circuit then; Then sending the digital frequency-selecting module to handles; Intermediate-freuqncy signal after the processing gets into again extends in the capping unit integrated module, upconverts to up 200M radiofrequency signal to intermediate-freuqncy signal by up-converter circuit, outputs to up 200M power amplifier and amplifies.
As shown in Figure 8; Descending 900M power amplifier of TU Trunk Unit and the descending 200M power amplifier of TU Trunk Unit and the descending 900M power amplifier of extension capping unit have all adopted digital pre-distortion technology with the up 200M power amplifier of extension capping unit; Digital pre-distortion technology adopts data processor to build a nonlinear circuit opposite with the radio-frequency power amplifier nonlinear characteristic at the intermediate-frequency section of transmitting chain, can be with the linear amplification of input signal after superposeing with power amplifier.Contrary characteristic through in the distortion of amplifier front construction non-linearity of power amplifier reaches linearizing purpose; And come the parameter of adaptive updates inversion model to come the nonlinear drift of compensated amplifier through the system output and the difference of Expected Response, the transmission characteristic of locking different capacity amplifier.In the predistortion adjusting stage, wireless signal shines upon through constellation point, after pulse shaping filter, sampling etc. are handled, produces the input signal of predistorter: the data set I of inphase quadrature again
n, Q
n, through behind the predistortion correction, the predistorter dateout is ^I
n, ^Q
n, this adjusted data experience D/ A conversion, modulation, amplification output.In the self adaptation stage, the output signal of getting power amplifier is sampled through demodulation then; Again it is compared with input signal; And adopt certain adaptive algorithm, and be used for the self adaptation adjustment of predistorter, confirm " the predistortion correction degree " of data next time.The once more complete course of work that Here it is.After system power amplifier has adopted digital pre-distortion technology, effectively reduce power consumption, improved the efficient of power amplifier, made whole system efficient energy-saving more.
Foregoing; Be merely the preferred embodiment of this patent; It is not the embodiment that is used to limit this patent; Those of ordinary skills can carry out corresponding flexible and adjustment, so the protection range of this patent should be as the criterion with the desired protection range of claims very easily according to the main design and the spirit of this patent.Some improvement that those skilled in the art of the present technique carry out the utility model under the prerequisite that does not break away from the utility model principle and modification also fall in the protection range of the utility model claim.
Claims (7)
1. the remote stretch system of energy-saving multi-carrier digital optical fiber companding is characterized in that: be made up of access unit, TU Trunk Unit and extension capping unit; Said access unit one end and base station or base station zoom out system are coupled, and the other end is connected with TU Trunk Unit through optical fiber; The said TU Trunk Unit other end is provided with the 900M retransmitting antenna and the 200M relaying antenna that is used for communicating with the extension capping unit that is used for downlink radio-frequency signal is transmitted into the area of coverage; Said extension capping unit one end is provided with the relaying antenna that is used for carrying out with TU Trunk Unit 200M relaying antenna radio communication, and the other end is provided with the downlink radio-frequency signal that is used for after amplifying and resends the retransmitting antenna to communication blind district.
2. the remote stretch system of energy-saving multi-carrier digital optical fiber companding according to claim 1, it is characterized in that: said access unit comprises access unit integrated module, power module, power-supply filter, constant-temperature crystal oscillator, monitoring unit, access unit digital intermediate frequency plate and digital light module; Said power module is electrically connected with access unit integrated module, constant-temperature crystal oscillator, monitoring unit, access unit digital intermediate frequency plate and digital light module respectively through power-supply filter; Said constant-temperature crystal oscillator is connected with the access unit integrated module with monitoring unit one end, and the other end is connected with access unit digital intermediate frequency plate; Two-way communication forms up link and down link respectively between said access unit integrated module and the access unit digital intermediate frequency plate; Said access unit digital intermediate frequency plate is connected with the digital light module.
3. the remote stretch system of energy-saving multi-carrier digital optical fiber companding according to claim 2, it is characterized in that: said access unit integrated module is made up of dielectric duplexer, up frequency changer circuit and descending frequency changer circuit; Said up frequency changer circuit and dielectric duplexer are connected to form up link, and dielectric duplexer and descending frequency changer circuit are connected to form down link; Said access unit digital intermediate frequency plate is provided with ADC, DAC, digital signal processing module and photoelectric conversion module; Said ADC, digital signal processing module and photoelectric conversion module connect and compose down link in order, and photoelectric conversion module, digital signal processing module and DAC connect and compose up link in order.
4. the remote stretch system of energy-saving multi-carrier digital optical fiber companding according to claim 1, it is characterized in that: said TU Trunk Unit comprises TU Trunk Unit digital intermediate frequency plate, 900M frequency conversion integrated module, 200M frequency conversion integrated module, power module, power-supply filter, TU Trunk Unit monitoring unit, descending 900M power amplifier, descending 200M power amplifier, 900M duplexer, 200M duplexer, 900M retransmitting antenna and 200M relaying antenna; Said 900M frequency conversion integrated module is connected with the 900M duplexer with TU Trunk Unit digital intermediate frequency plate, TU Trunk Unit monitoring unit, descending 900M power amplifier respectively, and 200M frequency conversion integrated module is connected with the 200M duplexer with TU Trunk Unit digital intermediate frequency plate, TU Trunk Unit monitoring unit, descending 200M power amplifier respectively; Said power module is electrically connected with TU Trunk Unit digital intermediate frequency plate, 900M frequency conversion integrated module, 200M frequency conversion integrated module, TU Trunk Unit monitoring unit, descending 900M power amplifier, descending 200M power amplifier, 900M duplexer and 200M duplexer respectively through power-supply filter; Said TU Trunk Unit digital intermediate frequency plate, 900M frequency conversion integrated module, descending 900M power amplifier and 900M duplexer connect and compose the 900M down link in order, and 900M duplexer, 900M frequency conversion integrated module and TU Trunk Unit digital intermediate frequency plate connect and compose the 900M up link in order; Said TU Trunk Unit digital intermediate frequency plate, 200M frequency conversion integrated module, descending 200M power amplifier and 200M duplexer connect and compose the 200M down link in order, and 200M duplexer, 200M frequency conversion integrated module and TU Trunk Unit digital intermediate frequency plate connect and compose the 200M up link in order.
5. the remote stretch system of energy-saving multi-carrier digital optical fiber companding according to claim 4 is characterized in that: said 900M frequency conversion integrated module is made up of up frequency changer circuit, the low noise cancellation circuit of up 900M and descending frequency changer circuit; Low noise cancellation circuit of said up 900M and the up frequency changer circuit formation up link that is serially connected; Said 200M frequency conversion integrated module is made up of up frequency changer circuit, the low noise cancellation circuit of up 200M and descending frequency changer circuit; Low noise cancellation circuit of said up 200M and the up frequency changer circuit formation up link that is serially connected.
6. the remote stretch system of energy-saving multi-carrier digital optical fiber companding according to claim 1 is characterized in that: said extension capping unit comprises relaying antenna, 200M duplexer, up 200M power amplifier, extends capping unit integrated module, descending digital frequency-selecting module, constant-temperature crystal oscillator, upstream digital frequency-selecting module, monitoring module, power module, power-supply filter, descending 900M power amplifier, duplexer and retransmitting antenna; Said 200M duplexer one end is connected with the relaying antenna, and the other end is connected with extension capping unit integrated module; The said extension capping unit integrated module other end is connected with duplexer with descending digital frequency-selecting module, constant-temperature crystal oscillator, upstream digital frequency-selecting module, descending 900M power amplifier respectively; Said up 200M power amplifier is connected with the 200M duplexer with extension capping unit integrated module respectively; Said constant-temperature crystal oscillator is connected with upstream digital frequency-selecting module with descending digital frequency-selecting module respectively; Said power module is connected with duplexer with 200M duplexer, up 200M power amplifier, extension capping unit integrated module, descending digital frequency-selecting module, constant-temperature crystal oscillator, upstream digital frequency-selecting module, monitoring module, descending 900M power amplifier respectively through power-supply filter; Said 200M duplexer, extension capping unit integrated module, descending 900M power amplifier and duplexer connect and compose down link in order, and duplexer, extension capping unit integrated module, up 200M power amplifier and 200M duplexer connect and compose up link in order.
7. the remote stretch system of energy-saving multi-carrier digital optical fiber companding according to claim 6, it is characterized in that: said extension capping unit integrated module is made up of descending 200M LNA circuit, the descending frequency changer circuit of down link, the up frequency changer circuit of down link, power management module, monitoring unit, Clock management module, up link up-converter circuit, up link lower frequency changer circuit and up LNA circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202575109U CN202121587U (en) | 2011-07-21 | 2011-07-21 | Companding remote stretch system for energy-saving multicarrier digital optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202575109U CN202121587U (en) | 2011-07-21 | 2011-07-21 | Companding remote stretch system for energy-saving multicarrier digital optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202121587U true CN202121587U (en) | 2012-01-18 |
Family
ID=45462623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202575109U Expired - Fee Related CN202121587U (en) | 2011-07-21 | 2011-07-21 | Companding remote stretch system for energy-saving multicarrier digital optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202121587U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051369A (en) * | 2012-12-28 | 2013-04-17 | 成都泰格微电子研究所有限责任公司 | Wireless ad hoc network-based wireless repeater |
| CN109104232A (en) * | 2018-09-25 | 2018-12-28 | 中国联合网络通信集团有限公司 | A kind of wireless relay apparatus and wireless communication system |
-
2011
- 2011-07-21 CN CN2011202575109U patent/CN202121587U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051369A (en) * | 2012-12-28 | 2013-04-17 | 成都泰格微电子研究所有限责任公司 | Wireless ad hoc network-based wireless repeater |
| CN109104232A (en) * | 2018-09-25 | 2018-12-28 | 中国联合网络通信集团有限公司 | A kind of wireless relay apparatus and wireless communication system |
| CN109104232B (en) * | 2018-09-25 | 2021-03-16 | 中国联合网络通信集团有限公司 | Wireless relay equipment and wireless communication system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10763952B2 (en) | Systems and methods for a fronthaul network | |
| CN102082752B (en) | Digital predistortion processing method and equipment | |
| CN103828259A (en) | Distributed antenna system architectures | |
| CN102457458A (en) | Digital pre-distortion realization method of base station and apparatus thereof | |
| CN102377027A (en) | Active antenna and method for calibrating active antenna | |
| CN102870494A (en) | High efficiency, remotely reconfigurable remote radio head unit system and method for wireless communications | |
| CN101183903A (en) | Digital optical fiber repeater system | |
| CN203219304U (en) | Energy-efficient multicarrier digital fiber microwave remote extension system | |
| CN205179054U (en) | Compatible TDD of full bandwidth of multimode and FDD's two -way enlarged wireless repeater system | |
| CN107888274A (en) | Movable signal relay amplification device | |
| CN102307064A (en) | Frequency-shift-based multi-system analogue fiber broadband access system and transmission method thereof | |
| CN102523029B (en) | Digital enclave system | |
| CN202121587U (en) | Companding remote stretch system for energy-saving multicarrier digital optical fiber | |
| CN203574664U (en) | LTE digital double-channel transmission apparatus | |
| CN102215045B (en) | Transceiver capable of simultaneously covering second generation (2G) and third generation (3G) signals and signal processing method of transceiver | |
| CN104243059A (en) | Relay transmission method and optimization method based on wireless local area network | |
| CN101420397B (en) | Digital repeater station and self-excited eliminating method and device | |
| CN203166923U (en) | Digital microwave optical fiber zooming distribution system | |
| CN102036257A (en) | Digital frequency shift companding system | |
| CN201550113U (en) | Digital microwave frequency shift repeater station | |
| Andrawes et al. | Energy harvesting with cooperative networks and adaptive transmission | |
| CN201781497U (en) | Multi-carrier digital companding frequency selecting and shifting device | |
| CN202043077U (en) | DPD Feedback path shared by multi-standard system | |
| CN201904922U (en) | Digital frequency shift companding system | |
| CN201839289U (en) | High-efficiency digital optical-fiber CDMA (code division multiple access) repeater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20160721 |