CN201260163Y - Radio frequency extension apparatus and base station system - Google Patents
Radio frequency extension apparatus and base station system Download PDFInfo
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- CN201260163Y CN201260163Y CNU2008200499594U CN200820049959U CN201260163Y CN 201260163 Y CN201260163 Y CN 201260163Y CN U2008200499594 U CNU2008200499594 U CN U2008200499594U CN 200820049959 U CN200820049959 U CN 200820049959U CN 201260163 Y CN201260163 Y CN 201260163Y
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Abstract
The utility model relates to a remote radio unit device and a base station system, which comprises a photoelectric conversion module, a digital intermediate-frequency processing module, a radio-frequency transmission and reception processing module, a power amplifier low-noise array module, a filter array module and a power division mixer connected with the radio-frequency transmission and reception processing module, wherein, the photoelectric conversion module, the digital intermediate-frequency processing module, the radio-frequency transmission and reception processing module, the power amplifier low-noise array module and the filter array module are sequentially connected, the radio-frequency transmission and reception processing module specifically comprises a switch device positioned on a business channel, the switch device is simultaneously connected with the power amplifier low-noise array module and the power division mixer, and the switch device controls the connection between the uplink and the downlink with the power amplifier low-noise array module and the power division mixer according to the received calibrating signals of the uplink and the downlink. The calibrating channel shares one channel with one of the business channels between the digital intermediate-frequency processing module and the radio-frequency transmission and reception processing module, and does not need establish independent calibrating channel. The number of used components is correspondingly reduced, thereby reducing the hardware cost, the volume and the weight of the integral machine. Moreover, the calibrating channel can be backed up, and the reliability and the allowance rate of the system can be improved.
Description
Technical field
The utility model relates to the mobile communication technology field, particularly radio frequency extension apparatus in the moving communicating field and base station system.
Background technology
In the mobile communication technology field, in order to solve network addressing difficulty, networking inconvenience and cost drop into problem of higher, current cordless communication network adopts BBU (Base Band Unit more, Base Band Unit)+RRU (Radio Remote Unit, Remote Radio Unit) multichannel coverage mode, GSM (Global System for Mobile communication for example, global system for mobile communications), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, the CDMA (Code Division Multiple Access) that time-division is synchronous), CDMA (wideband code-division multiple access, broadband demal multiplex (MUX) access) or the like, wherein, be connected by optical fiber between BBU and the RRU, adopt one to one or the distribution mode of one-to-many.
Adopt the BBU+RRU structure, when transmitting downstream signal, directly be connected by optical fiber by BBU with RRU, what transmit between BBU and the RRU is baseband digital signal, thereby the base station can be controlled certain user's signal and launches from the RRU passage of certain appointment, and when transmitting upward signal, user's mobile phone signal is received by nearest RRU passage, pass through Optical Fiber Transmission to the base station from this RRU passage then, thereby can reduce interference greatly user on other passages of this sub-district.
Yet, when adopting the BBU+RRU structure, especially adopt in the BBU+RRU structure of intelligent antenna technology, require the amplitude of service channel of each signal transmission and phase place within the error that system allows, because the variation of factors such as the inconsistency of hardware and environment, the amplitude or the phase place that cause each service channel possibly change, therefore need periodically calibrate the service channel of each signal transmission, so that each service channel amplitude and phase place within the error that system allows, in the prior art, use one independently calibrated channel calibrate.
As shown in Figure 1, it is the structural representation of a kind of RRU of the prior art, it comprises that successively photoelectric conversion module, Digital IF Processing module, radio-frequency receiving-transmitting processing module, power amplifier LNA array module, filter array module that connects and the merit that is connected with the radio-frequency receiving-transmitting processing module divide mixer, and filter array module, merit divide mixer to be connected with antenna by modes such as coaxial cables simultaneously.Wherein, in this RRU structure, can transmit N service channel and 1 calibrated channel simultaneously, be separate between its calibrated channel and the service channel, as shown in the figure, between Digital IF Processing module and radio-frequency receiving-transmitting processing module, calibrated channel and each service channel adopt separate passage respectively, and calibrated channel adopts the independently Digital IF Processing module of equipment such as switch and upper end, the merit of lower end divides mixer to connect, and each service channel also adopts switch separately to be connected with the Digital IF Processing module of upper end and the power amplifier LNA array module of lower end.
According to this RRU structure of the prior art, when carrying out normal business operation flow process, on down direction: with one of them service channel is example, photoelectric conversion module receives the light signal that BBU comes via Optical Fiber Transmission, this light signal is converted to digital signal, and the digital signal after will changing sends the Digital IF Processing module to; The Digital IF Processing module is carried out corresponding operational processes to this digital signal and is obtained corresponding analog intermediate frequency signal or base-band analog signal, and sends to the radio-frequency receiving-transmitting processing module; The corresponding service passage of radio-frequency receiving-transmitting processing module carries out up-conversion and amplifieroperation to it after receiving, and the radiofrequency signal after up-conversion is amplified is by respective channel in the switching device feed-in power amplifier LNA array module; Behind power amplification operation by power amplifier LNA array module, the filtering operation of filter array module, send to antenna.
On up direction: the service channel in the filter array module receives the subscriber signal that antenna for base station received, this subscriber signal is carried out filtering, to suppress interference, filtered signal is carried out low noise by power amplifier LNA array module to be amplified, radiofrequency signal after low noise amplifies is amplified and down-conversion operation by the radio-frequency receiving-transmitting processing module, produce analog if signal or analog baseband signal, and this analog if signal or analog baseband signal be fed into corresponding business passage in the Digital IF Processing module, by the Digital IF Processing module converts is digital signal, and through sending to photoelectric conversion module after corresponding the processing, after photoelectric conversion module is converted into light signal, and send BBU to by modes such as optical fiber.
When carrying out descending calibration: the Digital IF Processing module sends analog if signal or the analog baseband signal that comprises calibrating signal to each service channel; After each service channel of radio-frequency receiving-transmitting processing module receives, it is carried out the up-conversion amplifieroperation, be converted to radiofrequency signal, and each service channel of process switch separately sends to power amplifier LNA array module downwards, by the power amplification operation of power amplifier LNA array module, feed antenna behind the filtering operation of filter array module; After antenna end receives the filtered signal of each service channel correspondence, the signal that this signal and antenna end are stored in advance is coupled respectively, and signal after coupling is sent to merit divide mixer, enter the radio-frequency receiving-transmitting processing module by calibrated channel, through amplifying, produce analog if signal or analog baseband signal after the down-conversion Frequency mixing processing, and through this independently calibrated channel be fed into the Digital IF Processing module, calculate the amplitude and the phase place of the calibrating signal that is comprised in the received digital medium-frequency signal after handling accordingly by the Digital IF Processing module, finish the collection and the processing of relevant information;
When carrying out up calibration, the Digital IF Processing module sends analog if signal or the analog baseband signal that comprises calibrating signal downwards by calibrated channel, the calibrated channel of radio-frequency receiving-transmitting processing module receives above-mentioned signal, carry out the up-conversion amplifieroperation, be converted to radiofrequency signal, and send to merit by calibrated channel and divide mixer, divide mixer to send to the antenna for base station end by merit; Antenna end receives after the above-mentioned radiofrequency signal, this radiofrequency signal is coupled to each service channel, each service channel signal after coupling is respectively by the upwards transmission of each service channel, filtering by the filter array module, the low noise of power amplifier LNA array module amplifies, produce analog if signal or analog baseband signal behind amplification of radio-frequency receiving-transmitting processing module and the down-conversion mixing operation, be fed into corresponding service passage in the Digital IF Processing module; In the Digital IF Processing module the received analog if signal of each service channel or analog baseband signal carried out corresponding process operations and calculate the amplitude and the phase place of the calibrating signal that is comprised in the received digital medium-frequency signal, finish the collection and the processing of relevant information;
According to above-mentioned this RRU structure of the prior art, between Digital IF Processing module and radio-frequency receiving-transmitting processing module, be to use independently calibrated channel separately, correspondingly need use device count such as independent frequency mixer, amplifier at this passage, thereby cause the device count of the required use of whole device also to increase thereupon, make hardware cost height, the volume of complete machine big and system weight is big.
The utility model content
The purpose of this utility model is to provide a kind of RRU device, and its whole hardware cost is low, volume is little and system weight is less.
For achieving the above object, the utility model by the following technical solutions:
A kind of radio frequency extension apparatus, comprise the photoelectric conversion module that connects successively, the Digital IF Processing module, the radio-frequency receiving-transmitting processing module, power amplifier LNA array module, the filter array module, and the merit that is connected with described radio-frequency receiving-transmitting processing module is divided mixer, described merit divides mixer to be connected with antenna, wherein, described radio-frequency receiving-transmitting processing module comprises: be positioned at a switching device on the service channel, described switching device while and described power amplifier LNA array module, described merit divides mixer to connect, described switching device receives the descending calibrating signal or the up calibrating signal of described Digital IF Processing module, control the down link and the described power amplifier LNA array module of described service channel according to described descending calibrating signal and connect, the up link of described service channel and described merit divide mixer to connect; Control described down link and described merit according to described up calibrating signal and divide mixer to connect, described up link and the connection of described power amplifier LNA array module.
According to radio frequency extension apparatus of the present utility model, switching device while and power amplifier LNA array module on one of them service channel, merit divides mixer to connect, and according to the up calibrating signal or the descending calibrating signal of Digital IF Processing module, control the up link that this service channel is connected with the Digital IF Processing module end, down link and power amplifier LNA array module, merit is divided the connection status between the mixer, because the up link of this service channel, down link divides mixer to be connected by switching device and merit simultaneously, make that the calibrated channel between Digital IF Processing module and radio-frequency receiving-transmitting processing module can be simultaneously and the shared passage of this service channel, and need not to open up an independently passage for calibrated channel, correspondingly also can reduce employed frequency mixer, device count such as amplifier, thereby the hardware cost of reduction complete machine, reduce volume and reduce system weight.
Second purpose of the present utility model is to provide a kind of base station system, and its whole hardware cost is low, volume is little, system weight is less and system reliability and backup property are strong.
For achieving the above object, the utility model by the following technical solutions:
A kind of base station system, comprise interconnective Base Band Unit and at least one Remote Radio Unit, described Remote Radio Unit comprises: the photoelectric conversion module of Lian Jieing successively, the Digital IF Processing module, the radio-frequency receiving-transmitting processing module, power amplifier LNA array module, the filter array module, and the merit that is connected with described radio-frequency receiving-transmitting processing module is divided mixer, described merit divides mixer to be connected with antenna, wherein, described radio-frequency receiving-transmitting processing module comprises: be positioned at a switching device on the service channel, described switching device while and described power amplifier LNA array module, described merit divides mixer to connect, described switching device receives the descending calibrating signal or the up calibrating signal of described Digital IF Processing module, control the down link and the described power amplifier LNA array module of described service channel according to described descending calibrating signal and connect, the up link of described service channel and described merit divide mixer to connect; Control described down link and described merit according to described up calibrating signal and divide mixer to connect, described up link and the connection of described power amplifier LNA array module.
According to base station system of the present utility model, switching device while and power amplifier LNA array module on one of them service channel, merit divides mixer to connect, and according to the up calibrating signal or the descending calibrating signal of Digital IF Processing module, control the up link of this service channel, down link and power amplifier LNA array module, merit is divided the connection status between the mixer, because the up link of this service channel, down link divides mixer to be connected by switching device and merit simultaneously, calibrated channel between Digital IF Processing module and radio-frequency receiving-transmitting processing module can be simultaneously and the shared passage of this service channel, and need not to open up an independently passage for calibrated channel, correspondingly also can reduce employed frequency mixer, device count such as amplifier, thereby the hardware cost of reduction complete machine, reduce volume and reduce system weight.
Description of drawings
Fig. 1 is the structural representation of radio frequency extension apparatus of the prior art;
Fig. 2 is the structural representation of radio frequency extension apparatus of the present utility model;
Fig. 3 is the structural representation of the radio-frequency receiving-transmitting processing module among the utility model embodiment one;
Fig. 4 is the structural representation of the radio-frequency receiving-transmitting processing module in the utility model the foregoing description two;
Fig. 5 is the structural representation of the radio-frequency receiving-transmitting processing module in the utility model the foregoing description three;
Fig. 6 is the structural representation of the radio-frequency receiving-transmitting processing module in the utility model the foregoing description four;
Fig. 7 is the structural representation of the Digital IF Processing module of this utility model embodiment;
Fig. 8 is the structural representation of the power amplifier LNA array module of the utility model embodiment
Fig. 9 is the structural representation of the filter array module of the utility model embodiment.
Embodiment
Be elaborated at radio frequency extension apparatus of the present utility model below.
Embodiment one:
As shown in Figure 2, it is the structural representation of the utility model radio frequency extension apparatus, in the present embodiment, on the service channel therein, merit is divided a shared switch between mixer, Digital IF Processing module and the power amplifier LNA array module, makes calibrated channel and this a service channel shared passage between Digital IF Processing module and radio-frequency receiving-transmitting processing module.
As shown in Figure 2, radio frequency extension apparatus in the present embodiment comprises interconnective photoelectric conversion module, the Digital IF Processing module, the radio-frequency receiving-transmitting processing module, power amplifier LNA array module, the filter array module, comprise that also the merit that is connected with the radio-frequency receiving-transmitting processing module divides mixer, this merit divides mixer to be connected with antenna by modes such as coaxial cables, the filter array module is connected with antenna by modes such as coaxial cables, described photoelectric conversion module is connected with upper end BBU by modes such as optical fiber, wherein, on the service channel therein, switch while and described Digital IF Processing module in the described radio-frequency receiving-transmitting processing module, described merit is divided mixer, described power amplifier LNA array module is connected, and is used to control described Digital IF Processing module, described merit is divided mixer, connection status between the described power amplifier LNA array module.
Wherein, the light signal that described photoelectric conversion module is used on down direction Optical Fiber Transmission being come is converted to digital signal, and the digital signal after will changing sends the Digital IF Processing module to and handles, and the digital signal that on up direction digital intermediate frequency is sent is converted into light signal and sends the upper end BBU that is connected with this radio frequency extension apparatus by modes such as optical fiber to.
Described Digital IF Processing module mainly is that the signal that above-mentioned photoelectric conversion module is sent carries out operations such as Digital Up Convert, digital-to-analogue conversion, and the signal that receives from the radio-frequency receiving-transmitting processing module is carried out operations such as analog-to-digital conversion, Digital Down Convert.
Described power amplifier LNA array module is mainly carried out power amplification to downstream signal, and upward signal is carried out the low noise amplifieroperation.
Described filter array module is mainly carried out filtering operation, to finish the inhibition to out of band signal, prevents the transmit scattering of downstream signal, the noise jamming of upward signal.
As shown in Figure 3, it is the structural representation of the radio-frequency receiving-transmitting processing module in the present embodiment, it mainly comprises RF up-converter and amplifier on the down link that lays respectively at each service channel, be positioned at radio frequency down-conversion and amplifier on the up link, and while and these two switching devices that amplifier is connected, on the service channel therein, this switching device also simultaneously divides mixer to be connected with power amplifier LNA array module and merit, this switching device is according to the control signal of Digital IF Processing module, control the up link of this service channel, down link and this power amplifier LNA array module, merit is divided the connection status of mixer, and on other service channel, simultaneously with its up link, the switch that down link connects only is connected with power amplifier LNA array module.
According to the radio frequency extension apparatus in the above-mentioned present embodiment, concrete signal processing procedure to this radio frequency extension apparatus is described in detail below, in the following description, only by switching device simultaneously and the Digital IF Processing module to wherein one, merit is divided mixer, the regular traffic operation and the calibration process of the service channel that power amplifier LNA array module connects describe, for only by switch with the Digital IF Processing module for service channel that power amplifier LNA truth module is connected, concrete business operation and the data transmission procedure in the calibration process can with prior art in identical, therefore, will not give unnecessary details in the present embodiment.
With one of them service channel is example, service channel 1 for example shown in Figure 3, and when concrete Business Processing, its concrete handling process comprises:
On down direction:
Photoelectric conversion module receives the light signal that BBU comes via Optical Fiber Transmission, this light signal is converted to digital signal, and the digital signal after will changing sends the Digital IF Processing module to;
The Digital IF Processing module receives the data that send over from photoelectric conversion module, obtains analog intermediate frequency signal or base-band analog signal after these data are carried out corresponding operational processes, sends to the radio-frequency receiving-transmitting processing module;
The respective channel of radio-frequency receiving-transmitting processing module receives analog intermediate frequency signal or the base-band analog signal that sends from the Digital IF Processing module, by up-conversion mixer and amplifier this analog intermediate frequency signal or base-band analog signal are carried out the up-conversion amplification, the down link of switching device control this moment service channel 1 is connected with power amplifier LNA array, and the radiofrequency signal after up-conversion is amplified is by respective channel in the switching device feed-in power amplifier LNA array module;
The downlink radio-frequency signal of the service channel 1 in the service channel 1 received RF transmitting-receiving processing module of power amplifier LNA array module, it is carried out the power amplification operation, and the signal after the power amplification operation sent to the filter array module, the signal that is undertaken behind the filtering operation by the filter array module sends to antenna.
On up direction:
The service channel 1 of Digital IF Processing module receives analog intermediate frequency or analog baseband signal from the radio-frequency receiving-transmitting processing module, is converted into digital signal, and sends photoelectric conversion module to through the data after will handling after corresponding the processing;
Photoelectric conversion module is converted into light signal with the digital signal that the Digital IF Processing module sends, and sends BBU to by modes such as optical fiber.
In addition, as shown in Figure 3, in the present embodiment, service channel 1 divides mixer and power amplifier LNA array module to be connected with Digital IF Processing module, merit simultaneously by switching device, promptly divide calibrated channel and this service channel 1 shared passage between the mixer in Digital IF Processing module and merit, below be example with this service channel 1 with the shared passage of calibrated channel, the specific implementation process of calibration function is described in detail:
When carrying out descending calibration:
The Digital IF Processing module sends the digital signal that has comprised descending calibrating signal to each service channel downwards, and, comprise described descending calibrating signal in this analog if signal or the analog baseband signal through being converted to analog if signal or analog baseband signal after the operations such as digital-to-analogue conversion;
Each service channel of radio-frequency receiving-transmitting processing module receives above-mentioned analog if signal or the analog baseband signal that comprises descending calibrating signal, up-conversion mixer and amplifier by separately carry out the up-conversion amplifieroperation, be converted to radiofrequency signal, at this moment, the switch of each service channel switches on the down direction, wherein the switching device in the service channel 1 is according to the descending calibrating signal that comprises in the radiofrequency signal, the down link of control service channel 1 is connected with power amplifier LNA array module, the down link of each service channel is connected with power amplifier LNA array module, and the above-mentioned radiofrequency signal of each service channel is fed in the power amplifier LNA array module through switch separately;
Power amplifier in the power amplifier LNA array module carries out power amplification to this radiofrequency signal, and the signal after the power amplification is sent to filter corresponding in the filter array module, is fed in the antenna through behind the filter filtering;
After antenna end receives signal behind the filter filtering of each service channel correspondence, the signal that this signal and antenna end are stored in advance is coupled respectively, and signal after coupling is sent to merit divide mixer, divide mixer to enter calibrated channel by merit, at this moment, the switching device that is connected with service channel 1 divides mixer to be connected with the up link of service channel 1 according to the descending calibrating signal control merit that comprises in the described coupled signal, merit divides the received radiofrequency signal of mixer to handle back generation analog if signal or analog baseband signal through amplifier and down-conversion mixer, is fed into corresponding service passage 1 in the Digital IF Processing module;
The service channel 1 of Digital IF Processing module receives after analog if signal or the analog baseband signal, after carrying out operation such as analog-to-digital conversion, obtain digital medium-frequency signal, and the amplitude and the phase place of the calibrating signal that calculates in the digital medium-frequency signal to be comprised, finish the collection and the processing of relevant information;
By that analogy, after obtaining the amplitude and phase place of the corresponding calibrating signal of each service channel by this calibrated channel, compare, just can obtain the amplitude difference and the phase difference of each service channel, thereby can calibrate the amplitude and the phase place of each service channel based on this, so that the amplitude difference of each service channel and phase difference remain within the desired scope of system.
According to the process of above-mentioned descending calibration, be example with the service channel shown in Fig. 31 with the shared passage of calibrated channel, the process of up calibration is:
The Digital IF Processing module is downwards to calibrated channel, be that the service channel 1 shown in Fig. 3 sends the digital signal that has comprised up calibrating signal, and, comprise described up calibrating signal in this analog if signal or the analog baseband signal through being converted to analog if signal or analog baseband signal after the operations such as digital-to-analogue conversion;
The service channel 1 of radio-frequency receiving-transmitting processing module receives above-mentioned analog if signal or the analog baseband signal that comprises calibrating signal, carry out the up-conversion amplifieroperation by up-conversion mixer and amplifier, be converted to radiofrequency signal, at this moment, the switching device of service channel 1 correspondence divides mixer to be connected according to the down link of the up calibrating signal control service channel 1 that comprises in this radiofrequency signal with merit, and the above-mentioned radiofrequency signal of service channel 1 enters merit through switching device and divides mixer;
Merit sends it to the antenna for base station end after dividing mixer to receive above-mentioned radiofrequency signal;
Antenna end receives after the above-mentioned radiofrequency signal, and this radiofrequency signal is coupled to each service channel, comprises service channel 1, and each service channel signal after coupling by the upwards transmission of each service channel, enters the corresponding business passage in the filter array module respectively;
Each service channel in the filter array module receives after the coupled signal that antenna for base station sent, and this coupled signal is carried out filtering, disturbs with inhibition, and filtered signal is upwards sent to corresponding service passage in the power amplifier LNA array module;
The corresponding service channel filtering signal that the service channel of array module sends that accepts filter carries out low noise to it and amplifies in the power amplifier LNA array module, and the signal corresponding service passage in the radio-frequency receiving-transmitting processing module after low noise amplified sends;
The corresponding service passage receives the radiofrequency signal that sends from power amplifier LNA array module in the radio-frequency receiving-transmitting processing module, at this moment, the up link that the switch of each service channel correspondence is controlled this service channel is connected with the respective channel of power amplifier LNA array, wherein service channel 1 is connected with the service channel 1 of power amplifier LNA array module according to the up link of the up calibrating signal control service channel 1 that comprises in the radiofrequency signal, radiofrequency signal after low noise amplifies produces analog if signal or analog baseband signal by amplifier and down-conversion mixer, is fed into corresponding service passage in the Digital IF Processing module;
The corresponding service passage receives after analog if signal or the analog baseband signal in the Digital IF Processing module, after operations such as analog to digital converter, obtain digital medium-frequency signal, and calculate the amplitude and the phase place of the received calibrating signal that digital medium-frequency signal comprised, finish the collection and the processing of relevant information; By that analogy, after obtaining the amplitude and phase place of corresponding calibrating signal from each service channel, compare, just can obtain the amplitude difference and the phase difference of each service channel, thereby can calibrate the amplitude and the phase place of each service channel based on this, so that the amplitude difference of each service channel and phase difference remain within the desired scope of system.
According to the radio frequency extension apparatus in the above-mentioned present embodiment, being example shown in Fig. 3, by switching device to the Digital IF Processing module, merit is divided mixer, annexation between the power amplifier LNA array module is switched, calibrated channel and service channel 1 be a shared passage between Digital IF Processing module and radio-frequency receiving-transmitting processing module, employed frequency mixer, the decreased number of devices such as amplifier, reduced the hardware cost of device complete machine, reduced system bulk, reduce the weight of entire system, and do not influence the performance of normal service communication and calibration function, brought convenience for the enforcement and the constructing operation of concrete device.
In addition, as shown in Figure 3, by switching device switch the Digital IF Processing module, merit divides the service channel of the annexation between mixer, the power amplifier LNA array module to have two, service channel 1 as shown in Figure 3, service channel 2, at this moment, these two service channels all can be used as the calibrated channel of RRU, and calibrated channel 2 can be used as the backup path of calibrated channel 1, after calibrated channel 1 breaks down, when for example physical fault has taken place in some device, calibrated channel 2 can be used as calibrated channel, to improve the reliability and the fault-tolerance of system.
Wherein, as shown in Figure 3, be with service channel 1, service channel 2 respectively with calibrated channel 1, calibrated channel 2 shared same passages describe, in fact, the service channel shared with calibrated channel can be to select arbitrarily from all service channels, in addition, the service channel of this shared same passage and the number of calibrated channel can also be more than 2 or 2, and a use calibrated channel wherein is as main calibrated channel, other calibrated channel is as the backup calibrated channel, so that when main calibrated channel breaks down, use the backup calibrated channel to calibrate, to improve the reliability of entire system, fault-tolerance and stability.In addition,, when having used the backup calibrated channel, correspondingly do not increase the employed device count of entire system, make that whole hardware cost is low, system weight is little and have calibration performance preferably according to above-mentioned scheme of the present utility model.
Wherein, described switching device is to the Digital IF Processing module, merit is divided mixer, the control of the annexation between the power amplifier LNA array module, both can be that the information that is comprised in the signal during according to above-mentioned communication is controlled, can also be periodically or send Continuity signal at intervals and control by the Digital IF Processing module, make control device according to this Continuity signal periodically or at intervals conducting down link or up link and power amplifier LNA array module, merit is divided the connection between the mixer, also can be to operate control according to the frame structure of the applied communication system of this radio frequency extension apparatus, for example, with the TD-SCDMA system is example, because each frame of TD-SCDMA system has two subframes, and have two transfer points on each subframe, be respectively to be transformed into up link by down link, be transformed into down link by up link, in addition, can also be by in the frame structure, descending time slot changes the switching that comes the control switch device, conducting state, thereby, time slot feature according to this frame structure can realize the control to connection status.
Wherein, when having the calibrated channel of backup, the switching of calibrated channel can be switched in the following manner:
With the calibrated channel shown in Fig. 31, calibrated channel 2 is example, the Digital IF Processing module is the calibrated channel of acquiescence with calibrated channel 1 at first, and calibrate by this calibrated channel 1, sending calibrating signal, and receive after the calibrating signal that feeds back, whether the power of judging the signal that this feeds back is within predetermined scope
If then calibrated channel 1 does not break down, and to continue with this calibrated channel 1 serve as to give tacit consent to calibrated channel,
If outside preset range, the fault that some device in the calibrated channel 1 takes place then is described, it is no longer reliable to calibrate the calibration result that is produced by calibrated channel 1, then with the calibrated channel of calibrated channel 2 as this acquiescence, calibrates by this calibrated channel 2.
When the backup calibrated channel that has more than 2 or 2, concrete processing procedure does not repeat them here by that analogy.
Embodiment two
In the present embodiment, the difference with embodiment one is that mainly present embodiment has carried out further qualification to the switching device of radio-frequency receiving-transmitting processing module among the embodiment one.
As shown in Figure 4, it is the structural representation of the radio-frequency receiving-transmitting processing module in the present embodiment, in the present embodiment, described switching device specifically comprises: be positioned at first switch on this service channel down link, be positioned at the second switch on the described service channel up link, this first switch, second switch is while and power amplifier LNA array module respectively, and merit divides mixer to connect, first switch is used to control the down link and the described power amplifier LNA array module of this service channel, described merit is divided the connection status between the mixer, and described second switch is used to control the up link and the described power amplifier LNA array module of described service channel, described merit is divided the connection status between the mixer.
At the scheme in the present embodiment, below wherein one in the present embodiment is described with the regular traffic operation and the calibration process of the service channel of the shared same passage of calibrated channel between Digital IF Processing module and radio-frequency receiving-transmitting processing module, the service channel shown in Fig. 41 for example, the process of other calibrated channel is identical therewith, and for independent service channel, concrete business operation and the data transmission procedure in the calibration process can with prior art in identical, therefore, will not give unnecessary details in the present embodiment.
In the present embodiment, when carrying out the operation of normal service communication, with service channel shown in Figure 41 is example, on down direction, service channel 1 is undertaken entering first switch behind the up-conversion amplifieroperation by up-conversion mixer and amplifier from analog if signal or the analog baseband signal that the Digital IF Processing module receives, at this moment, the down link of first switch control service channel 1 is connected with power amplifier LNA array module, and the radiofrequency signal after up-conversion is amplified enters power amplifier LNA array module through this first switch; On up direction, service channel receives radiofrequency signal from power amplifier LNA array module, at this moment, the up link of second switch control service channel 1 is connected with power amplifier LNA array module, be converted to analog if signal or analog baseband signal after radiofrequency signal process amplifier that is received and the down-conversion mixer operation, be fed into the analog to digital converter of respective channel in the Digital IF Processing module.
When carrying out descending calibration operation, the down link of service channel 1 receives analog if signal that has comprised descending calibrating signal or the analog baseband signal that sends from the Digital IF Processing module, undertaken being converted to radiofrequency signal behind the up-conversion amplifieroperation by up-conversion mixer and amplifier, and enter first switch, at this moment, first switch is connected with power amplifier LNA array module according to the down link of the descending calibrating signal control service channel 1 that comprises in the above-mentioned radiofrequency signal, radiofrequency signal behind the up-conversion amplifieroperation enters power amplifier LNA array module through this first switch, and the power amplification operation of process power amplifier LNA array module, feed antenna behind the filtering operation of filter array module, after antenna receives filtered signal, with of the signal coupling of this signal with storage in advance, result after the coupling is sent to merit divide mixer, the radio-frequency receiving-transmitting processing module divides mixer to receive this signal from merit, at this moment, second switch divides mixer to be connected according to the up link of the descending calibrating signal control service channel 1 that comprises in this signal after coupling with merit, thereby, after merit divides the signal in the mixer to pass through second switch, through being converted to analog if signal or analog baseband signal after amplifier and the down-conversion mixer operation, be fed into analog to digital converter corresponding in the Digital IF Processing module.
When carrying out up calibration operation, the down link of service channel 1 receives analog if signal that has comprised up calibrating signal or the analog baseband signal that sends from the Digital IF Processing module, undertaken being converted to radiofrequency signal behind the up-conversion amplifieroperation by up-conversion mixer and amplifier, and enter first switch, at this moment, first switch is according to the up calibrating signal that comprises in this radiofrequency signal, the down link of control service channel 1 divides mixer to be connected with merit, merit divides mixer that this radiofrequency signal is sent to antenna end, after antenna end receives this radiofrequency signal, it is coupled to service channel 1, service channel 1 signal after coupling is through the filtering operation of filtering array module, behind the low noise amplifieroperation of power amplifier LNA array module, feed-in radio-frequency receiving-transmitting processing module, the radio-frequency receiving-transmitting processing module receives the radiofrequency signal after this LNA operation from power amplifier LNA array module, at this moment, second switch is according to the up calibrating signal that comprises in this radiofrequency signal, the up link of control service channel 1 is connected with power amplifier LNA array module, thereby, the radiofrequency signal that receives from power amplifier LNA array module is through behind the second switch, through being converted to analog if signal or analog baseband signal after amplifier and the down-conversion mixer operation, be fed into analog to digital converter corresponding in the Digital IF Processing module.
Identical among other technologies feature in the present embodiment and the embodiment one do not repeat them here.
Embodiment three:
In the present embodiment, the difference with embodiment one is that mainly present embodiment has carried out further qualification to the switching device of radio-frequency receiving-transmitting processing module among the embodiment one.
As shown in Figure 5, it is the structural representation of the radio-frequency receiving-transmitting processing module in the present embodiment, in the present embodiment, described switching device specifically comprises: simultaneously with the up link of described service channel, the 3rd switch that down link is connected, the 4th switch, the other end of the 3rd switch is connected with described power amplifier LNA array module, be used to control the up link of described service channel, connection status between down link and the described power amplifier LNA array module, the other end of described the 4th switch divides mixer to be connected with described merit, is used to control the up link of described service channel, the connection status that down link and described merit are divided mixer.
At the scheme in the present embodiment, below wherein one in the present embodiment is described with the regular traffic operation and the calibration process of the service channel of the shared same passage of calibrated channel between Digital IF Processing module and radio-frequency receiving-transmitting processing module, the service channel shown in Fig. 51 for example, the process of other calibrated channel is identical therewith, and for independent service channel, concrete business operation and calibration process can with prior art in identical, therefore, will not give unnecessary details in the present embodiment.
In the present embodiment, when carrying out the operation of normal service communication, with service channel shown in Figure 51 is example, on down direction, service channel 1 is undertaken obtaining radiofrequency signal behind the up-conversion amplifieroperation by up-conversion mixer and amplifier from analog if signal or the analog baseband signal that the Digital IF Processing module receives, at this moment, the down link of the 3rd switch control service channel 1 is connected with power amplifier LNA array module, and the radiofrequency signal after up-conversion is amplified enters power amplifier LNA array module through the 3rd switch; On up direction, service channel 1 receives radiofrequency signal from power amplifier LNA array module, at this moment, the up link of the 3rd switch control service channel 1 is connected with power amplifier LNA array module, be converted to analog if signal or analog baseband signal after radiofrequency signal process amplifier that is received and the down-conversion mixer operation, be fed into the analog to digital converter of respective channel in the Digital IF Processing module.
When carrying out descending calibration operation, the down link of service channel 1 receives analog if signal that has comprised descending calibrating signal or the analog baseband signal that sends from the Digital IF Processing module, undertaken obtaining radiofrequency signal behind the up-conversion amplifieroperation by up-conversion mixer and amplifier, at this moment, the 3rd switch is connected with power amplifier LNA array module according to the down link of the descending calibrating signal control service channel 1 that comprises in this radiofrequency signal, radiofrequency signal behind the up-conversion amplifieroperation enters power amplifier LNA array module through the 3rd switch, and the power amplification operation of process power amplifier LNA array module, feed antenna behind the filtering operation of filter array module, after antenna receives filtered signal, with of the signal coupling of this signal with storage in advance, result after the coupling is sent to merit divide mixer, the radio-frequency receiving-transmitting processing module divides mixer to receive this signal from merit, at this moment, the 4th switch divides mixer to be connected according to the up link of the descending calibrating signal control service channel 1 that comprises in the signal after coupling with merit, thereby, after merit divides signal in the mixer through the 4th switch, through being converted to analog if signal or analog baseband signal after amplifier and the down-conversion mixer operation, be fed into analog to digital converter corresponding in the Digital IF Processing module.
When carrying out up calibration operation, the down link of service channel 1 receives analog if signal that has comprised up calibrating signal or the analog baseband signal that sends from the Digital IF Processing module, undertaken obtaining radiofrequency signal behind the up-conversion amplifieroperation by up-conversion mixer and amplifier, at this moment, the 4th switch divides mixer to be connected according to the down link of the up calibrating signal control service channel 1 that comprises in this radiofrequency signal with merit, merit divides mixer that this radiofrequency signal is sent to antenna end, after antenna end receives this radiofrequency signal, it is coupled to service channel 1, service channel 1 signal after coupling is through the filtering operation of filtering array module, after the LNA operation of power amplifier LNA array module, feed-in radio-frequency receiving-transmitting processing module, the radio-frequency receiving-transmitting processing module receives the radiofrequency signal after this LNA operation from power amplifier LNA array module, at this moment, the 3rd switch is connected with power amplifier LNA array module according to the up link of the up calibrating signal control service channel 1 that comprises in this radiofrequency signal, thereby, the radiofrequency signal that from power amplifier LNA array module, receives through the 3rd switch after, through being converted to analog if signal or analog baseband signal after amplifier and the down-conversion mixer operation, be fed into analog to digital converter corresponding in the Digital IF Processing module.
Identical among other technologies feature in the present embodiment and the embodiment one do not repeat them here.
Embodiment four:
In the present embodiment, the difference with embodiment one is that mainly present embodiment has carried out further qualification to the switching device of radio-frequency receiving-transmitting processing module among the embodiment one.
As shown in Figure 6, it is the structural representation that radio-frequency receiving-transmitting processing module and merit in the present embodiment divide mixer to be connected, in the present embodiment, described switching device specifically comprises: the down link, the 5th switch on the up link, the 6th switch that lay respectively at described service channel, the minion pass, the octavo that are connected between described the 5th switch and described the 6th switch are closed, the other end that described minion is closed divides mixer to be connected with described merit, and the other end that described octavo is closed is connected with described power amplifier LNA array module.
At the scheme in the present embodiment, below wherein one in the present embodiment is described with the regular traffic operation and the calibration process of the service channel of the shared same passage of calibrated channel between Digital IF Processing module and radio-frequency receiving-transmitting processing module, service channel 1 for example shown in Figure 6, the process of other calibrated channel is identical therewith, and for independent service channel, concrete business operation and the data transmission procedure in the calibration process can with prior art in identical, therefore, will not give unnecessary details in the present embodiment.
In the present embodiment, when carrying out the operation of normal service communication, with service channel shown in Figure 61 is example, on down direction, service channel 1 is undertaken obtaining radiofrequency signal behind the up-conversion amplifieroperation by up-conversion mixer and amplifier from analog if signal or the analog baseband signal that the Digital IF Processing module receives, at this moment, according to described radiofrequency signal, be example for example with the TD-SCDMA system, according in the frame structure of described radiofrequency signal by up link be transformed into down link transfer point and on, the time slot of down link, the 5th switch, octavo is closed and is switched to down direction, the down link of service channel 1 is connected with power amplifier LNA array module, and the radiofrequency signal after up-conversion is amplified is through the 5th switch, octavo is closed and is entered power amplifier LNA array module; On up direction, service channel 1 receives radiofrequency signal from power amplifier LNA array module, at this moment, according to this radiofrequency signal, be example for example with the TD-SCDMA system, according in the frame structure in this radiofrequency signal by down link be transformed into up link transfer point and on, the time slot of down link, octavo is closed, the 6th switch switches to up direction, the up link of service channel 1 is connected with power amplifier LNA array module, be converted to analog if signal or analog baseband signal after radiofrequency signal process amplifier that is received and the down-conversion mixer operation, be fed into the analog to digital converter of respective channel in the Digital IF Processing module.
When carrying out descending calibration operation, the down link of service channel 1 receives analog if signal that has comprised descending calibrating signal or the analog baseband signal that sends from the Digital IF Processing module, undertaken obtaining radiofrequency signal behind the up-conversion amplifieroperation by up-conversion mixer and amplifier, at this moment, according to the above-mentioned descending calibrating signal that comprises in this radiofrequency signal, be example for example with the TD-SCDMA system, according in the frame structure by up link be transformed into down link transfer point and on, the time slot of down link, the 5th switch, octavo is closed and is switched to down direction, the down link of this service channel 1 is connected with power amplifier LNA array module, radiofrequency signal behind the up-conversion amplifieroperation is through the 5th switch, octavo is closed and is entered power amplifier LNA array module, and the power amplification operation of process power amplifier LNA array module, feed antenna behind the filtering operation of filter array module, after antenna receives filtered signal, with of the signal coupling of this signal with storage in advance, result after the coupling is sent to merit divide mixer, the radio-frequency receiving-transmitting processing module divides mixer to receive this signal from merit, at this moment, according to the descending calibrating signal that comprises in the signal after this coupling, be example for example with the TD-SCDMA system, according in the frame structure by down link be transformed into up link transfer point and on, the time slot of down link, minion is closed, the 6th switch switches to up direction, make the up link of this service channel 1 divide mixer to be connected with merit, thereby, merit divides the signal in the mixer to close through minion, behind the 6th switch, through being converted to analog if signal or analog baseband signal after amplifier and the down-conversion mixer operation, be fed into analog to digital converter corresponding in the Digital IF Processing module.
When carrying out up calibration operation, the down link of service channel 1 receives analog if signal that has comprised up calibrating signal or the analog baseband signal that sends from the Digital IF Processing module, undertaken obtaining radiofrequency signal behind the up-conversion amplifieroperation by up-conversion mixer and amplifier, at this moment, according to the up calibrating signal that comprises in this radiofrequency signal, be example for example with the TD-SCDMA system, according in the frame structure by up link be transformed into down link transfer point and on, the time slot of down link, the 5th switch, minion is closed and is switched to down direction, make the down link of this service channel 1 divide mixer to be connected with merit, merit divides mixer that this radiofrequency signal is sent to antenna end, after antenna end receives this radiofrequency signal, it is coupled to service channel 1, service channel 1 signal after coupling is by the filtering operation of filter array module, after the LNA operation of power amplifier LNA array module, feed-in radio-frequency receiving-transmitting processing module, the radio-frequency receiving-transmitting processing module receives the radiofrequency signal after this LNA operation from power amplifier LNA array module, at this moment, according to the up calibrating signal that comprises in this radiofrequency signal, be example for example with the TD-SCDMA system, according in the frame structure by down link be transformed into up link transfer point and on, the time slot of down link, octavo is closed, the 6th switch switches to up direction, the up link of this service channel 1 is connected with power amplifier LNA array module, thereby, the radiofrequency signal that receives from power amplifier LNA array module is closed through octavo, behind the 6th switch, through being converted to analog if signal or analog baseband signal after amplifier and the down-conversion mixer operation, be fed into analog to digital converter corresponding in the Digital IF Processing module.
Identical among other technologies feature in the present embodiment and the embodiment one do not repeat them here.
In addition, as shown in Figure 7, it is the structural representation of the Digital IF Processing module of the utility model embodiment, it comprises data set/separate frame unit, clock system that is connected with this data set/separate frame unit and supervisory control system, at least one DDC (Digital Down Convert), at least one DUC (Digital Up Convert), and the analog to digital converter that is connected with DDC, the digital to analog converter that is connected with DUC.Wherein, clock system mainly is that clock devices for each passage provides work clock.
When carrying out concrete Business Processing process, on down direction, data set/separate frame unit to receive the data that send over from photoelectric conversion module, these data are carried out corresponding operational processes obtain baseband user data and monitor data, and monitor data sent to supervisory control system, baseband user data is sent to the DUC and the digital to analog converter of each passage, produce analog intermediate frequency signal or base-band analog signal, send to the radio-frequency receiving-transmitting processing module; On up direction, the Digital IF Processing module receives analog intermediate frequency or analog baseband signal from the radio-frequency receiving-transmitting processing module, sampling via the analog to digital converter of each passage, be converted to digital signal, and be converted to satisfactory baseband user data through the DDC of each passage and send to data set/separate frame unit, data set/separating frame unit carries out framing to this baseband user data and from the resulting monitor data of supervisory control system, sends the data behind the framing to photoelectric conversion module.
As shown in Figure 8, it is the structural representation of the power amplifier LNA array module of the utility model embodiment, as shown in the figure, it comprises: switch on any one service channel and circulator, be connected in power amplifier and LNA between switch and the circulator side by side, it is connected with the radio-frequency receiving-transmitting processing module of upper end by switch, is connected with the filter array module of lower end by circulator.When concrete the processing, be example with one of them service channel,
On down direction, the downlink radio-frequency signal of the respective channel in this Traffic Channel received RF transmitting-receiving processing module, at this moment, switch switches to down direction, the upper end of service channel is connected with power amplifier, radiofrequency signal is carried out power amplification through behind the switch by power amplifier, then by corresponding passage in the circulator feed-in filter array module;
On up direction, this Traffic Channel terminal signaling in the respective channel of array module that accepts filter, enter LNA through circulator and carry out the low noise amplification, the feed-in switch, at this moment, switch switches to up direction, and the upper end of Traffic Channel is connected with LNA, and the signal after low noise amplifies is through being received by the up link of corresponding passage in the radio-frequency receiving-transmitting processing module behind the switch.
As shown in Figure 9, it is the filter array module diagram in the present embodiment, all have a filter on any one service channel, this filter array module is mainly used in the inhibition of finishing out of band signal, prevents the transmit scattering of downstream signal, the interference of upward signal.
According to the radio frequency extension apparatus of the present utility model in the various embodiments described above, a kind of base station system can be provided, this base station system can comprise BBU and at least one above-mentioned radio frequency extension apparatus, and this radio frequency extension apparatus is can be respectively identical with feature in the various embodiments described above, does not repeat them here.Wherein, base station system of the present utility model can be applicable to wireless communication systems such as GSM, TD-SCDMA, CDMA; when base station system of the present utility model is the TD-SCDMA system; form according to the TD-SCDMA radio frames; under the situation that does not influence the TD-SCDMA signal; up calibration data, descending calibration can be the GP time slots that is positioned at the TD-SCDMA radio frames; promptly protect time slot; and the shared number of chips of calibration data can be provided with as required; but be no more than the chip lengths of GP, i.e. 96 chips.
Above-described the utility model execution mode does not constitute the qualification to the utility model protection range.Any modification of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the claim protection range of the present utility model.
Claims (12)
1, a kind of radio frequency extension apparatus, comprise the photoelectric conversion module that connects successively, the Digital IF Processing module, the radio-frequency receiving-transmitting processing module, power amplifier LNA array module, the filter array module, and the merit that is connected with described radio-frequency receiving-transmitting processing module is divided mixer, described merit divides mixer to be connected with antenna, described filter array module is connected with antenna, it is characterized in that: described radio-frequency receiving-transmitting processing module comprises: be provided with switching device on any one service channel, described switching device while and described power amplifier LNA array module, described merit divides mixer to connect
Described switching device receives the descending calibrating signal or the up calibrating signal of described Digital IF Processing module, control the down link and the described power amplifier LNA array module of described service channel according to described descending calibrating signal and connect, the up link of described service channel and described merit divide mixer to connect; Control described down link and described merit according to described up calibrating signal and divide mixer to connect, described up link and the connection of described power amplifier LNA array module.
2, radio frequency extension apparatus according to claim 1, it is characterized in that, also comprise: described switching device receives the non-calibrating signal of downlink or uplink of described Digital IF Processing module, controls the down link and the described power amplifier LNA array module of described service channel according to described descending non-calibrating signal and connects; Control described up link and the connection of described power amplifier LNA array module according to described up non-calibrating signal.
3, radio frequency extension apparatus according to claim 1 and 2 is characterized in that, described switching device comprises: be positioned at first switch on the described down link, be positioned at the second switch on the described up link.
4, radio frequency extension apparatus according to claim 1 and 2, it is characterized in that, described switching device comprises: the 3rd switch, the 4th switch that are connected with described up link, described down link simultaneously, the other end of described the 3rd switch is connected with described power amplifier LNA array module, and the other end of described the 4th switch divides mixer to be connected with described merit.
5, radio frequency extension apparatus according to claim 1 and 2, it is characterized in that, described switching device comprises: lay respectively at the 5th switch, the 6th switch on described down link, the described up link, the minion pass, the octavo that are connected between described the 5th switch and described the 6th switch are closed, the other end that described minion is closed divides mixer to be connected with described merit, and the other end that described octavo is closed is connected with described power amplifier LNA array module.
6, radio frequency extension apparatus according to claim 1 and 2 is characterized in that, the number of described service channel is two or more.
7, a kind of base station system, comprise interconnective Base Band Unit and at least one Remote Radio Unit, described Remote Radio Unit comprises: the photoelectric conversion module of Lian Jieing successively, the Digital IF Processing module, the radio-frequency receiving-transmitting processing module, power amplifier LNA array module, the filter array module, and the merit that is connected with described radio-frequency receiving-transmitting processing module is divided mixer, described merit divides mixer to be connected with antenna, described filter array module is connected with antenna, it is characterized in that: described radio-frequency receiving-transmitting processing module comprises: be provided with switching device on any one service channel, described switching device while and described power amplifier LNA array module, described merit divides mixer to connect
Described switching device receives the descending calibrating signal or the up calibrating signal of described Digital IF Processing module, control the down link and the described power amplifier LNA array module of described service channel according to described descending calibrating signal and connect, the up link of described service channel and described merit divide mixer to connect; Control described down link and described merit according to described up calibrating signal and divide mixer to connect, described up link and the connection of described power amplifier LNA array module.
8, base station system according to claim 7, it is characterized in that, also comprise: described switching device receives the non-calibrating signal of downlink or uplink of described Digital IF Processing module, controls the down link and the described power amplifier LNA array module of described service channel according to described descending non-calibrating signal and connects; Control described up link and the connection of described power amplifier LNA array module according to described up non-calibrating signal.
9, according to claim 7 or 8 described base station systems, it is characterized in that described switching device comprises: be positioned at first switch on the described down link, be positioned at the second switch on the described up link.
10, according to claim 7 or 8 described base station systems, it is characterized in that, described switching device comprises: the 3rd switch, the 4th switch that are connected with described up link, described down link simultaneously, the other end of described the 3rd switch is connected with described power amplifier LNA array module, and the other end of described the 4th switch divides mixer to be connected with described merit.
11, according to claim 7 or 8 described base station systems, it is characterized in that, described switching device comprises: lay respectively at the 5th switch, the 6th switch on described down link, the described up link, the minion pass, the octavo that are connected between described the 5th switch and described the 6th switch are closed, the other end that described minion is closed divides mixer to be connected with described merit, and the other end that described octavo is closed is connected with described power amplifier LNA array module.
According to claim 7 or 8 described base station systems, it is characterized in that 12, the number of described service channel is two or more.
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| CNU2008200499594U CN201260163Y (en) | 2008-06-30 | 2008-06-30 | Radio frequency extension apparatus and base station system |
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| CNU2008200499594U CN201260163Y (en) | 2008-06-30 | 2008-06-30 | Radio frequency extension apparatus and base station system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729140A (en) * | 2009-11-10 | 2010-06-09 | 中兴通讯股份有限公司 | Channel calibration method and device |
| WO2010148720A1 (en) * | 2009-11-24 | 2010-12-29 | 中兴通讯股份有限公司 | Networking system for indoor coverage of time division duplex synchronous system |
| CN101304279B (en) * | 2008-06-30 | 2013-06-12 | 京信通信系统（中国）有限公司 | Radio frequency extension apparatus and base station system |
| CN114189260A (en) * | 2021-10-26 | 2022-03-15 | 江苏通鼎宽带有限公司 | Power amplifier for pRRU and pRRU power amplification all-in-one machine |
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2008
- 2008-06-30 CN CNU2008200499594U patent/CN201260163Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101304279B (en) * | 2008-06-30 | 2013-06-12 | 京信通信系统（中国）有限公司 | Radio frequency extension apparatus and base station system |
| CN101729140A (en) * | 2009-11-10 | 2010-06-09 | 中兴通讯股份有限公司 | Channel calibration method and device |
| WO2010148720A1 (en) * | 2009-11-24 | 2010-12-29 | 中兴通讯股份有限公司 | Networking system for indoor coverage of time division duplex synchronous system |
| CN102075955A (en) * | 2009-11-24 | 2011-05-25 | 中兴通讯股份有限公司 | Networking system for indoor coverage of time division duplex synchronous system |
| CN114189260A (en) * | 2021-10-26 | 2022-03-15 | 江苏通鼎宽带有限公司 | Power amplifier for pRRU and pRRU power amplification all-in-one machine |
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