CN202035008U - Radio frequency zooming system - Google Patents
Radio frequency zooming system Download PDFInfo
- Publication number
- CN202035008U CN202035008U CN2011201410255U CN201120141025U CN202035008U CN 202035008 U CN202035008 U CN 202035008U CN 2011201410255 U CN2011201410255 U CN 2011201410255U CN 201120141025 U CN201120141025 U CN 201120141025U CN 202035008 U CN202035008 U CN 202035008U
- Authority
- CN
- China
- Prior art keywords
- signal
- intercepting
- analog
- filter
- radio frequency
- 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
Landscapes
- Transceivers (AREA)
Abstract
The utility model provides a radio frequency zooming system capable of detecting disturbance situation of networks nearby a base station, which comprises a base band processing unit, a down data link and an up data link and is characterized by further comprising an interception feedback link. The interception feedback link comprises an interception receiving antenna, an interception filter, an interception low noise amplifier and an interception analog-to-digital converter which are sequentially connected. The interception receiving antenna receives radio frequency signals, the interception filter conducts a filter process on the radio frequency signals according to a preset interception frequency range and outputs intercepted signals. The intercepted signals are amplified by the interception low noise amplifier, processed by the interception analog-to-digital converter through sampling down-conversion and analog-to-digital conversion, and then output to the base band processing unit for base band signal process. The radio frequency zooming system can transmit and receive normal network signals, and simultaneously monitor wireless communication network environments of residential areas automatically.
Description
Technical field
The utility model relates to the technical field that radio frequency zooms out, and relates in particular to a kind of radio frequency stretch system.
Background technology
In existing cell base station design, RRU (Remote RF Unit, Remote Radio Unit) has become the main flow design, and (the supporting cell base station scheme of (Base Band Unit, baseband processing unit) and RRU has obtained a large amount of application to BBU.Common distributed base station is made up of BBU and RRU two parts, and the two connects by optical fiber, and its interface protocol is based on standard agreements such as CPRI, IR, and the equipment with main flow equipment vendors that can be stable is connected.BBU can be installed in suitable machine room position, RRU is installed in antenna end, former base station module can be separated a part like this comes out, by separating of BBU and RRU, management, monitoring, the maintenance work of complexity can be simplified to the BBU end, RRU generally selects for use optical fiber as transmission medium, and it makes Cell Site Placement more flexible.A BBU can connect several RRU, has so both saved the space, has reduced the cost of equipment again, has improved the efficient of networking.
At the cell base station networking initial stage, for the cell base station that guarantees to increase newly does not influence the cell base station that other have been in operate as normal, realize the network planning effectively, engineers and technicians need carry out emulation near the communication network environment the sub-district, the result who comes out by emulation is provided with parameters such as the channel frequency, transmitting power of newly-increased cell base station, but because can there be certain gap in simulation result with the actual communication networks ambient conditions, so the setting of base station initial value has many difficulty.
And in the running in base station later stage, because the communication network situation is unusual and some other operation problem may cause the channel frequency of the channel frequency of this sub-district and neighbor cell overlapping, neighbor cell is to problems such as the interference of this sub-district are excessive.Existing technology is by the communication network environment around the emulation sub-district again, the parameter that engineers and technicians obtain by emulation again is to this sub-district or even neighbor cell, carry out planning again, configuration and the optimization of channel frequency, transmitting power, but the problem of gap can appear existing with the actual communication networks ambient conditions in this simulation process equally, simulation result usually is not inconsistent with the actual interference environment, is unfavorable for the operate as normal of base station.
The utility model content
The technical problems to be solved in the utility model is to provide near a kind of radio frequency stretch system of the network interferences situation can base stations detected, by this radio frequency stretch system, can be when sending and receiving the proper network signal, near the situation of the wireless communication network environments the monitoring sub-district reaches automatically, during base station construction and when operation, parameters such as suitable channel frequency, transmitting power can both be set easily.
A kind of radio frequency stretch system, comprise baseband processing unit, the downlink data link and the up data link that connect described baseband processing unit, it is characterized in that, further comprise: connect the based on feedback link of intercepting of described baseband processing unit, the described based on feedback link of intercepting comprises intercepting reception antenna, intercept filter, intercept low noise amplifier and intercepting analog to digital converter of connecting successively; The described reception antenna received RF signal of intercepting, the described filter of intercepting carries out Filtering Processing according to the default band limits of intercepting to described radiofrequency signal; The described low noise amplifier of intercepting carries out processing and amplifying to described signal of intercepting filter output, the described analog to digital converter of intercepting is to described signal of intercepting after the filter processing and amplifying sample down-conversion and analog-to-digital conversion process, and the signal after the analog-to-digital conversion exported to carries out base band signal process in the described baseband processing unit.
Preferably, described downlink data link comprises: connect the descending digital to analog converter of described baseband processing unit, and be connected to downlink power amplifier, downstream filter and dual-mode antenna after the described descending digital to analog converter in turn; The downstream signal of described baseband processing unit output carries out digital-to-analogue conversion through described descending digital to analog converter, pass through the signal processing and amplifying of described downlink power amplifier then successively, after passing through the Filtering Processing of described downstream filter again, be coupled to described dual-mode antenna and send, therefore can the downstream signal of various standards be sent.
Preferably, described up data link comprises: be connected to described dual-mode antenna upstream filter, up low noise amplifier afterwards in turn, and the up analog to digital converter that connects described baseband processing unit; Pass through the Filtering Processing of described upstream filter from the upward signal of described dual-mode antenna reception, signal processing and amplifying through described up low noise amplifier, sample to export to after down-conversion and the analog-to-digital conversion process by described up analog to digital converter then and carry out base band signal process in the described baseband processing unit, therefore can the upward signal of various standards be received.
Further, described radio frequency stretch system further comprises circulator, and described downlink power amplifier and described up low noise amplifier all are connected to described circulator, and are connected to same filter by described circulator; Described circulator is to the signal timesharing transmission of described downlink power amplifier and described up low noise amplifier.Can make uplink and downlink data link shared filter and dual-mode antenna by described circulator is set, reduce installation cost.
Preferably, described baseband processing unit comprises at least two baseband processing chips, wherein, at least one described baseband processing chip connects described downlink data link and described up data link, described downstream signal and described upward signal are carried out base band signal process, at least another described baseband processing chip connects the described analog to digital converter of intercepting, and described signal of intercepting based on feedback link output is carried out base band signal process.Increase a plurality of baseband processing chips, can strengthen the disposal ability of whole system, improve the treatment effeciency of interception data.
A kind of radio frequency stretch system, comprise baseband processing unit, the downlink data link and the up data link that connect described baseband processing unit, it is characterized in that, further comprise: connect the based on feedback link of intercepting of described baseband processing unit, the described based on feedback link of intercepting comprises intercepting reception antenna, intercept filter, intercept low noise amplifier, intercept down conversion module and intercepting analog to digital converter of connecting successively; The described reception antenna received RF signal of intercepting, the described filter of intercepting carries out Filtering Processing according to the default band limits of intercepting to described radiofrequency signal; The described low noise amplifier of intercepting carries out processing and amplifying to described signal of intercepting filter output, the described down conversion module of intercepting is carried out down-converted to described signal of intercepting low noise amplifier output, the described analog to digital converter of intercepting carries out analog-to-digital conversion process to described signal of intercepting down conversion module output, and the signal after the analog-to-digital conversion exported to carries out base band signal process in the described baseband processing unit.
Preferably, described downlink data link comprises: connect the descending digital to analog converter of described baseband processing unit, and be connected to up-conversion module, downlink power amplifier, downstream filter and dual-mode antenna after the described descending digital to analog converter in turn; The downstream signal of described baseband processing unit output carries out digital-to-analogue conversion through described descending digital to analog converter, carry out upconversion process through described up-conversion module successively then, signal processing and amplifying through described downlink power amplifier, and through after the Filtering Processing of described downstream filter, be coupled to described dual-mode antenna and send, therefore can the downstream signal of various standards be sent.
Further, described downlink data link comprises the described up-conversion module of at least two serial connections, to successively carrying out the signal upconversion process through the analog signal after the digital-to-analogue conversion, handles by double conversion, improves treatment effeciency.
Preferably, described up data link comprises: the dual-mode antenna of Lian Jieing, upstream filter, up low noise amplifier, up low-converter successively, and the up analog to digital converter that connects described baseband processing unit; The upward signal that receives from described reception antenna passes through the Filtering Processing of described upstream filter, the signal processing and amplifying of the described up low noise amplifier of process, and the described up low-converter of process carries out the signal down-converted, undertaken exporting to after the analog-to-digital conversion process by described up analog to digital converter then and carry out base band signal process in the described baseband processing unit, therefore can the upward signal of various standards be received.
Further, described up data link comprises at least two described up low-converters of serial connection mutually, to successively carrying out the signal down-converted through the digital signal after the analog-to-digital conversion, handles by double conversion, improves treatment effeciency.
Preferably, the described based on feedback link of intercepting comprises two described down conversion module of intercepting of serial connection mutually at least, successively respectively described signal of intercepting low noise amplifier output is carried out down-converted, handles by double conversion, improves treatment effeciency.
Preferably, described radio frequency stretch system further comprises circulator, and described downlink power amplifier and described up low noise amplifier all are connected to described circulator, and are connected to same filter by described circulator; Described circulator is to the signal timesharing transmission of described downlink power amplifier and described up low noise amplifier, and when described circulator transmitted the signal of described downlink power amplifier output, described filter was a downstream filter; When described circulator during to described up low noise amplifier transmission signals, described filter is a upstream filter.Can make uplink and downlink data link shared filter and dual-mode antenna by described circulator is set, reduce installation cost.
Preferably, described baseband processing unit comprises at least two baseband processing chips, wherein, at least one described baseband processing chip connects described downlink data link and described up data link, described downstream signal and described upward signal are carried out base band signal process, at least another described baseband processing chip connects the described analog to digital converter of intercepting, and described signal of intercepting analog to digital converter output is carried out base band signal process.Increase a plurality of baseband processing chips, can strengthen the disposal ability of whole system, improve the treatment effeciency of interception data.
Preferably, described radio frequency stretch system further comprises control unit, described control unit is when detecting the channel frequency of described radio frequency stretch system existence free time, open the described based on feedback link of intercepting, and set described intercept filter to intercept band limits corresponding with described idle channel frequency; Perhaps descend, when the cutting off rate increase reaches preset value, open the described based on feedback link of intercepting in the speech quality that detects system.By described control unit is set, when reaching predetermined condition, open listening functions, need not Artificial Control, more convenient operation, also more accurate.
Compared with prior art, be provided with the described based on feedback link of intercepting in the radio frequency stretch system of the present utility model, the described based on feedback link of intercepting comprises and intercepts reception antenna, intercepts filter, intercepts low noise amplifier, intercepts down conversion module, intercepts analog to digital converter.Receive intercepting signal and, being converted into baseband signal by baseband processing unit again in the default band limits by the described based on feedback link of intercepting by a series of processing.The described default band limits that detects can be the signal frequency range of this sub-district, the perhaps signal frequency range of neighbor cell network, and described baseband signal can be used for network analysis, determines operations such as interference band.Therefore the signal frequency range that can avoid having taken or interference is bigger reduces the signal interference that the base station is subjected in construction or running, guarantee the normal operation of base station.
Description of drawings
Fig. 1 is the structural representation of the utility model radio frequency stretch system first execution mode;
Fig. 2 is the structural representation of the utility model radio frequency stretch system second execution mode;
Fig. 3 is the structural representation of the utility model radio frequency stretch system the 3rd execution mode;
Fig. 4 is the structural representation of the utility model radio frequency stretch system the 4th execution mode;
Fig. 5 is the structural representation of the utility model radio frequency stretch system the 5th execution mode;
Fig. 6 is the structural representation of the utility model radio frequency stretch system the 6th execution mode;
Fig. 7 is the structural representation of the utility model radio frequency stretch system the 7th execution mode.
Embodiment
See also Fig. 1, Fig. 1 is the structural representation of the utility model radio frequency stretch system first execution mode.
Described radio frequency stretch system comprises: baseband processing unit 105 connects downlink data link, the up data link of described baseband processing unit 105, and intercepts based on feedback link.
Described baseband processing unit 105 is used for described downlink data link, up data link, and the output or the input signal of intercepting based on feedback link carry out Base-Band Processing.Described downlink data link is used for transmission, sends downstream signal, and described up data link is used to receive upward signal.Described up data link and described downlink data link can use this area upper and lower data channel commonly used, mainly comprise upper and lower frequency conversion, filtering, module or devices such as modulus, digital-to-analogue conversion and Base-Band Processing, those skilled in the art can freely be provided with described upper and lower data channel according to actual needs.
And the described based on feedback link of intercepting comprises intercepting reception antenna 101, intercept filter 102, intercept low noise amplifier 103 and intercepting analog to digital converter 104 of connecting successively.Described reception antenna 101 received RF signal from the space of intercepting, and with described radio signal transmission to the described filter 102 of intercepting.Described network formats of intercepting the radiofrequency signal of reception antenna 101 receptions can set up on their own according to actual needs, radio frequency stretch system of the present utility model can be arranged to intercept the network signal of multiple different systems, comprising: GSM, CDMA, TD-SCDMA, WCDMA, CDMA2000, LTE, Wimax, WLAN etc.
The described filter 102 of intercepting carries out the rf filtering processing according to default band limits to the described described radiofrequency signal of intercepting reception antenna 101 transmission, after other useless signals of filtering, obtain frequency comparatively pure intercept signal, and the described signal of intercepting is transferred to the described low noise amplifier 103 of intercepting.Described default band limits of intercepting signal can be according to the signal frequency range of this subzone network, and perhaps the signal frequency range of neighbor cell network is specifically set according to the actual needs of intercepting, so that carry out network analysis, determines operations such as interference band.
The described described signal of intercepting of intercepting 103 pairs of processes of low noise amplifier carries out the signal processing and amplifying, and the signal of intercepting after will amplifying transfers to the described analog to digital converter 104 of intercepting, so that in follow-up processing enough signal strength signal intensities can be arranged.
In an embodiment, the described 104 pairs of described signals of intercepting of intercepting low noise amplifier 103 transmission of analog to digital converter of intercepting carry out Direct Sampling down-conversion and analog-to-digital conversion process, with the described conversion of signals of intercepting is digital baseband signal, and exports described baseband processing unit 105 to.Intercept the signal down-converted of directly sampling by described 104 pairs of the analog to digital converters of intercepting, can save special down conversion module, be suitable for frequency relatively low intercept signal, for frequency ratio higher intercept signal, as the signal of GSM900, adopt this programme to the requirement of described A/D conversion chip of intercepting analog to digital converter 104 than higher.
105 pairs of described digital baseband signals of intercepting analog to digital converter 104 outputs of described baseband processing unit carry out base band signal process, described base band signal process comprise at first carry out Digital Down Convert handle, further according to host-host protocol (for example CPRI agreement) framing, then the signal after the framing is transferred to photoelectric conversion module (figure does not show), convert the electrical signal to light signal by photoelectric conversion module, the BBU of described optical signal transmission to the base station analyzed etc. by optical fiber.
Both received upward signal and intercepted signal at described baseband processing unit 105, when exporting downstream signal again, the signal framing of 105 pairs of different passages of described baseband processing unit adds different identifiers to it respectively, makes described upward signal, downstream signal and intercept signal to keep independent mutually.
At this moment, handle when can select a fpga chip that capacity is bigger, disposal ability is stronger to realize these three kinds of signals, the fpga chip that also can additionally increase a low capacity realizes that extra process intercepts the requirement of signal, promptly wherein a fpga chip connects described downlink data link and described up data link, and described downstream signal and described upward signal are carried out base band signal process; At least another piece fpga chip connects the described analog to digital converter of intercepting, and the described signal of intercepting is carried out base band signal process.Or a plurality of fpga chips are set respectively handle described uplink and downlink signal, the described signal of intercepting.
Even intercept path and increased, we still can only use a pair of light/electric modular converter, optical fiber and BBU to carry out data interaction.Because we can select to have the photoelectric conversion module of wavelength division multiplexing function, photoelectric conversion module with wavelength division multiplexing can be used the recovery that sends and receive multiple different wave length to an optical fiber, and signal accords with by flag of frame after framing and distinguishing, this has saved fiber resource greatly, therefore, downstream signal, upward signal and intercept signal and can in same optical fiber, transmit and can keep separately independence.
See also Fig. 2, Fig. 2 is the structural representation of second execution mode of the utility model radio frequency stretch system.
Be in the main distinction of present embodiment with described first execution mode: described downlink data link comprises the descending digital to analog converter 111 that is connected described baseband processing unit 105, and is connected to downlink power amplifier 112, downstream filter 113 and dual-mode antenna 114 after the described descending digital to analog converter 111 in turn; The downstream signal of described baseband processing unit 105 outputs carries out digital-to-analogue conversion through described descending digital to analog converter 111, pass through the signal processing and amplifying of described downlink power amplifier 112 then successively, after passing through the Filtering Processing of described downstream filter 113 again, be coupled to described dual-mode antenna 114 and send.
Because the up-conversion module is set described downstream signal is not carried out upconversion process in the radio frequency stretch system of present embodiment, therefore, need be when carrying out digital-to-analogue conversion by described descending digital to analog converter 111, the digital signal that frequency is lower is converted to the higher analog signal of frequency, so that described downstream signal can send by described dual-mode antenna 114.Present embodiment equally relatively is applicable to the radiofrequency signal that frequency is low, perhaps selects the higher analog-digital chip of disposal ability for use, so that described descending digital to analog converter 111 can be realized frequency inverted.
Further, in the present embodiment, described up data link comprises: be connected to described dual-mode antenna 114 upstream filter 115, up low noise amplifier 116 afterwards in turn, and the up analog to digital converter 117 that connects described baseband processing unit 105;
Pass through the Filtering Processing of described upstream filter 115 from the upward signal of described dual-mode antenna 114 receptions, through the signal processing and amplifying of described up low noise amplifier 116, sample to export to after down-conversion and the analog-to-digital conversion process by described up analog to digital converter 117 then and carry out base band signal process in the described baseband processing unit.
Because described upward signal is not carried out down-converted in that down conversion module is set equally, therefore, described up analog to digital converter 117 is when carrying out analog-to-digital conversion, by up analog to digital converter 117 down-converted of directly sampling, be suitable for equally frequency relatively low intercept signal, perhaps adopt the higher A/D conversion chip of disposal ability.
See also Fig. 3, Fig. 3 is the structural representation of the utility model radio frequency stretch system the 3rd execution mode.
The main distinction of the radio frequency stretch system of present embodiment and described second execution mode is: described radio frequency stretch system further comprises circulator 118, described downlink power amplifier 112 and described up low noise amplifier 116 all are connected to described circulator 118, and are connected to same filter 119 by described circulator 118; Described circulator is to the signal timesharing transmission of described downlink power amplifier 112 and described up low noise amplifier 116, promptly the downstream signal of exporting described downlink power amplifier 112 in the different periods respectively perhaps receives upward signal and exports described up low noise amplifier 116 to described filter 119 from described filter 119.
When described circulator 118 transmitted the signal of described downlink power amplifier 112 outputs, described filter 119 was a downstream filter; When described up low noise amplifier 116 transmission signals of 118 pairs of described circulators, described filter 119 is a upstream filter.
In the present embodiment, the time division multiplexing by described circulator 118 is realized described filter 119 need not to set special described downstream filter 113 and described upstream filter 115, has saved installation cost and signal to bandwidth occupancy.
See also Fig. 4, Fig. 4 is the structural representation of the utility model radio frequency stretch system the 4th execution mode.In the present embodiment, described radio frequency stretch system comprises downlink data link, up data link equally and intercepts based on feedback link, and the described based on feedback link of intercepting also comprises intercepting reception antenna 101, intercept filter 102, intercepting low noise amplifier 103 of connecting successively.The difference of the radio frequency stretch system of present embodiment and described first execution mode is: also comprise and intercept down conversion module 121, the described low noise amplifier 103 of intercepting is connected to the described down conversion module 121 of intercepting, and is connected to the described analog to digital converter 104 of intercepting by the described down conversion module 121 of intercepting.
When described radio frequency stretch system is worked, described reception antenna 101 received RF signals of intercepting, the described filter 102 of intercepting carries out Filtering Processing according to the default band limits of intercepting to described radiofrequency signal, and signal is intercepted in output; The described signal of intercepting is through after the described signal processing and amplifying of intercepting low noise amplifier 103, carry out the signal down-converted through the described down conversion module 121 of intercepting, carry out analog-to-digital conversion by the described analog to digital converter 104 of intercepting then, and export in the described baseband processing unit 105 and carry out base band signal process.
In the present embodiment, described 121 pairs of described signals of intercepting of down conversion module of intercepting by special setting carry out down-converted, therefore alleviated described live load of intercepting analog to digital converter 104, can carry out effective down-conversion to the higher signal of intercepting of frequency, strengthen whole system intercepting Signal Processing ability and processing speed.
See also Fig. 5, Fig. 5 is the structural representation of the utility model radio frequency stretch system the 5th execution mode.
The radio frequency stretch system of present embodiment and second execution mode are basic identical, and its main distinction is: the radio frequency stretch system of present embodiment also comprises intercepts down conversion module 121 and up-conversion module 122; The described low noise amplifier 103 of intercepting is connected to the described down conversion module 121 of intercepting, and is connected to the described analog to digital converter 104 of intercepting by the described down conversion module 121 of intercepting; Described up-conversion module 122 is connected between described descending digital to analog converter 111 and the described downlink power amplifier 112, the signal of intercepting that described descending digital to analog converter 111 is carried out after the digital-to-analogue conversion carries out upconversion process, and the signal after will handling transfers to described downlink power amplifier 112 and carries out the signal processing and amplifying, after passing through the Filtering Processing of described downstream filter 113 again, the described signal of intercepting is coupled to described dual-mode antenna 114 transmissions.
Further, described up data link also comprises up low-converter 123, described up low-converter 123 is connected between described up low noise amplifier 116 and the described up analog to digital converter 117, upward signal to described up low noise amplifier 116 outputs carries out the signal down-converted, export described up analog to digital converter 117 then to and carry out analog-to-digital conversion process, export at last in the described baseband processing unit 105 and carry out base band signal process.
Respectively downstream signal is carried out up-conversion and upward signal is carried out down-conversion by described up-conversion module 122 and described up low-converter 123 are set, can alleviate the work load of described descending digital to analog converter 111 and described up analog to digital converter 117 equally, improve the processing speed of whole system.
The radio frequency stretch system of present embodiment can also be applied to the zero intermediate frequency technology.In the intermediate frequency technology, downconvert to the intermediate frequency difference, each down conversion module of zero intermediate frequency technology is directly will intercept radiofrequency signal to downconvert to zero-frequency, that simulates intercepts signal through after intercepting analog-to-digital conversion module 104 samplings, become digital signal, and then signal is delivered to baseband processing unit 105 handle.
See also Fig. 6, Fig. 6 is the structural representation of the utility model radio frequency stretch system the 6th execution mode.
The radio frequency stretch system of present embodiment and the 5th execution mode are basic identical, its main distinction is: the described based on feedback link of intercepting comprises at least two described down conversion module 121 of intercepting of serial connection mutually, and described two described down conversion module 121 of intercepting that are connected in series are mutually successively carried out down-converted to the described signal of intercepting of intercepting low noise amplifier 103 outputs respectively.Intercept 121 pairs of described signals of intercepting of down conversion module for two by successively being provided with and carry out double conversion, can carry out down-conversion to intercepting signal more quickly and efficiently.
So further, described downlink data link also can be provided with the described up-conversion module 122 of serial connection more than two, to successively carrying out the signal upconversion process through the analog signal after the digital-to-analogue conversion.
Perhaps described up data link also can be provided with at least two described up low-converters 123 of serial connection mutually, to successively carrying out the signal down-converted through the digital signal after the analog-to-digital conversion.
See also Fig. 7, Fig. 7 is the structural representation of the utility model radio frequency stretch system the 7th execution mode
The radio frequency stretch system of present embodiment and the 5th execution mode are basic identical, its main distinction is: described radio frequency stretch system further comprises circulator 118, described downlink power amplifier 112 and described up low noise amplifier 116 all are connected to described circulator 118, and are connected to same filter 119 by described circulator 118; Described circulator is to the signal timesharing transmission of described downlink power amplifier 112 and described up low noise amplifier 116, the downstream signal of exporting described downlink power amplifier 112 in the different periods perhaps receives upward signal and exports described up low noise amplifier 116 to described filter 119 from described filter 119 respectively.
Time division multiplexing by described circulator 118 is realized described filter 119 need not to set special described downstream filter 113 and described upstream filter 115, has saved installation cost and signal to bandwidth occupancy.
Radio frequency stretch system of the present utility model can be realized several special operational modes: one, when RRU opened listening functions, up data link and downlink data link automatically shut down, and under this pattern, intercepting reception antenna can be shared with the dual-mode antenna of RRU; Two, when RRU opens listening functions, up data link and downlink data link operate as normal, under this pattern, the dual-mode antenna that requires to intercept reception antenna and RRU separates use, and the described reception antenna of intercepting will reach certain isolation with described dual-mode antenna; Three, when radio frequency stretch system is in low telephone traffic, utilize idle time slot to intercept, under this pattern, intercepting reception antenna can be shared with the dual-mode antenna of RRU.
The mode that realization described in the utility model is a kind of to have a RRU device of listening functions can be divided into following two kinds of listen mode according to system's time of intercept state model of RRU: one, the set time intercepts, and promptly opens listening functions in certain period of time; Two, condition is intercepted, described condition is intercepted and can be divided into that resources supplIes is intercepted and QoS (Quality of Service, service quality) condition is intercepted, wherein resources supplIes is intercepted and is meant that ought detect system is in idle condition, when having idle channel frequency, open listening functions, and utilize the idle channel frequency to intercept; The QoS condition is intercepted and is meant under system deterioration situations such as the speech quality decline, cutting off rate increase that detect system and opens listening functions, and the communication network quality is improved.
Two kinds of above-mentioned listen mode can realize by control unit (figure does not show) is set in described radio frequency stretch system, described control unit is when detecting the channel frequency of described radio frequency stretch system existence free time, open the described based on feedback link of intercepting, and set described intercept filter to intercept band limits corresponding with described idle channel frequency; Perhaps descend, when the cutting off rate increase reaches preset value, open the described based on feedback link of intercepting in the speech quality that detects system.
In the radio frequency stretch system of this law, the described based on feedback link of intercepting can exist jointly with described up data link, also can be arranged on separately in the described radio frequency stretch system, and both are independent of each other.
Radio frequency stretch system of the present utility model can also have the combination and variation of various ways; for example those skilled in the art is according to the common practise of this area and the description of the utility model specification; above-mentioned a plurality of execution modes can be made up; to draw how different embodiments; the applicant thinks; this combination can be predicted, and does not need those skilled in the art to make creationary thinking, should be included within the protection range of the present utility model.
Radio frequency stretch system of the present utility model both can be single pass, also can be multichannel, and intercepting based on feedback link and descending DPD based on feedback link and standing wave, to detect link be independently to be present in the system fully, that is to say in having the radio frequency stretch system of intercepting based on feedback link, both to have existed descending DPD based on feedback link and standing wave to detect link simultaneously, also can break away from descending DPD based on feedback link and standing wave detection link individualism and intercept based on feedback link.
Radio frequency stretch system of the present utility model has some convenience in realization, such as can the shared baseband processing unit, shared descending DPD based on feedback link, shared standing wave detects link, shared up main collection link, shared up diversity link, common antenna, shared light/electric modular converter, common optical fiber resource etc. have greater advantage on operability and cost.
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 radio frequency stretch system comprises baseband processing unit, connects the downlink data link and the up data link of described baseband processing unit, it is characterized in that, further comprises: connect the based on feedback link of intercepting of described baseband processing unit,
The described based on feedback link of intercepting comprises intercepting reception antenna, intercept filter, intercept low noise amplifier and intercepting analog to digital converter of connecting successively;
The described reception antenna received RF signal of intercepting, the described filter of intercepting carries out Filtering Processing according to the default band limits of intercepting to described radiofrequency signal; The described low noise amplifier of intercepting carries out processing and amplifying to described signal of intercepting filter output, the described analog to digital converter of intercepting is to described signal of intercepting after the filter processing and amplifying sample down-conversion and analog-to-digital conversion process, and the signal after the analog-to-digital conversion exported to carries out base band signal process in the described baseband processing unit.
2. radio frequency stretch system as claimed in claim 1, it is characterized in that, described downlink data link comprises: connect the descending digital to analog converter of described baseband processing unit, and be connected to downlink power amplifier, downstream filter and dual-mode antenna after the described descending digital to analog converter in turn;
The downstream signal of described baseband processing unit output carries out digital-to-analogue conversion through described descending digital to analog converter, pass through the signal processing and amplifying of described downlink power amplifier then successively, after passing through the Filtering Processing of described downstream filter again, be coupled to described dual-mode antenna and send.
3. as claim 1 or 2 described radio frequency stretch systems, it is characterized in that, described up data link comprises: be connected to described dual-mode antenna upstream filter, up low noise amplifier afterwards in turn, and the up analog to digital converter that connects described baseband processing unit;
Pass through the Filtering Processing of described upstream filter from the upward signal of described dual-mode antenna reception, through the signal processing and amplifying of described up low noise amplifier, sample to export to after down-conversion and the analog-to-digital conversion process by described up analog to digital converter then and carry out base band signal process in the described baseband processing unit.
4. radio frequency stretch system as claimed in claim 3, it is characterized in that, described radio frequency stretch system further comprises circulator, and described downlink power amplifier and described up low noise amplifier all are connected to described circulator, and are connected to same filter by described circulator; Described circulator is to the signal timesharing transmission of described downlink power amplifier and described up low noise amplifier.
5. a radio frequency stretch system comprises baseband processing unit, connects the downlink data link and the up data link of described baseband processing unit, it is characterized in that, further comprises: connect the based on feedback link of intercepting of described baseband processing unit,
The described based on feedback link of intercepting comprises intercepting reception antenna, intercept filter, intercept low noise amplifier, intercept down conversion module and intercepting analog to digital converter of connecting successively;
The described reception antenna received RF signal of intercepting, the described filter of intercepting carries out Filtering Processing according to the default band limits of intercepting to described radiofrequency signal; The described low noise amplifier of intercepting carries out processing and amplifying to described signal of intercepting filter output, the described down conversion module of intercepting is carried out down-converted to described signal of intercepting low noise amplifier output, the described analog to digital converter of intercepting carries out analog-to-digital conversion process to described signal of intercepting down conversion module output, and the signal after the analog-to-digital conversion exported to carries out base band signal process in the described baseband processing unit.
6. radio frequency stretch system as claimed in claim 5, it is characterized in that, described downlink data link comprises: connect the descending digital to analog converter of described baseband processing unit, and be connected to up-conversion module, downlink power amplifier, downstream filter and dual-mode antenna after the described descending digital to analog converter in turn;
The downstream signal of described baseband processing unit output carries out digital-to-analogue conversion through described descending digital to analog converter, carry out upconversion process through described up-conversion module successively then, signal processing and amplifying through described downlink power amplifier, and, be coupled to described dual-mode antenna and send through after the Filtering Processing of described downstream filter.
7. radio frequency stretch system as claimed in claim 6 is characterized in that, described downlink data link comprises the described up-conversion module of at least two serial connections, to successively carrying out the signal upconversion process through the analog signal after the digital-to-analogue conversion.
8. as any described radio frequency stretch system in the claim 5 to 7, it is characterized in that, described up data link comprises: the dual-mode antenna of Lian Jieing, upstream filter, up low noise amplifier, up low-converter successively, and the up analog to digital converter that connects described baseband processing unit;
The upward signal that receives from described reception antenna passes through the Filtering Processing of described upstream filter, the signal processing and amplifying of the described up low noise amplifier of process, and carry out the signal down-converted through described up low-converter, undertaken exporting to after the analog-to-digital conversion process by described up analog to digital converter then and carry out base band signal process in the described baseband processing unit.
9. radio frequency stretch system as claimed in claim 8 is characterized in that, described up data link comprises at least two described up low-converters of serial connection mutually, to successively carrying out the signal down-converted through the digital signal after the analog-to-digital conversion.
10. radio frequency stretch system as claimed in claim 9 is characterized in that, the described based on feedback link of intercepting comprises two described down conversion module of intercepting of serial connection mutually at least, successively respectively described signal of intercepting low noise amplifier output is carried out down-converted.
11. radio frequency stretch system as claimed in claim 8, it is characterized in that, described radio frequency stretch system further comprises circulator, and described downlink power amplifier and described up low noise amplifier all are connected to described circulator, and are connected to same filter by described circulator; Described circulator is to the signal timesharing transmission of described downlink power amplifier and described up low noise amplifier, and when described circulator transmitted the signal of described downlink power amplifier output, described filter was a downstream filter; When described circulator during to described up low noise amplifier transmission signals, described filter is a upstream filter.
12. radio frequency stretch system as claimed in claim 8, it is characterized in that, further comprise control unit, described control unit is when detecting the channel frequency of described radio frequency stretch system existence free time, open the described based on feedback link of intercepting, and set described intercept filter to intercept band limits corresponding with described idle channel frequency; Perhaps descend, when the cutting off rate increase reaches preset value, open the described based on feedback link of intercepting in the speech quality that detects system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201410255U CN202035008U (en) | 2011-05-06 | 2011-05-06 | Radio frequency zooming system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201410255U CN202035008U (en) | 2011-05-06 | 2011-05-06 | Radio frequency zooming system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202035008U true CN202035008U (en) | 2011-11-09 |
Family
ID=44897291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201410255U Expired - Fee Related CN202035008U (en) | 2011-05-06 | 2011-05-06 | Radio frequency zooming system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202035008U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185809A (en) * | 2011-05-06 | 2011-09-14 | 京信通信系统（中国）有限公司 | Remote radio frequency system |
| CN102932888A (en) * | 2012-11-12 | 2013-02-13 | 华为技术有限公司 | Method, device and system of data processing during idle listening |
| CN103684492A (en) * | 2012-09-24 | 2014-03-26 | 中兴通讯股份有限公司 | Radio frequency signal sampling device, a reception machine and a base station. |
| CN104519518A (en) * | 2013-09-26 | 2015-04-15 | 北京锐安科技有限公司 | Portable WCDMA (Wideband Code Division Multiple Access) wireless signal field intensity measuring device |
| CN109819465A (en) * | 2019-01-18 | 2019-05-28 | 珠海市联电科技有限公司 | A kind of indoor RRU positioning diagnosticing method, apparatus and system based on passive RFID tags |
-
2011
- 2011-05-06 CN CN2011201410255U patent/CN202035008U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185809A (en) * | 2011-05-06 | 2011-09-14 | 京信通信系统（中国）有限公司 | Remote radio frequency system |
| WO2012152181A1 (en) * | 2011-05-06 | 2012-11-15 | 京信通信系统（中国）有限公司 | Remote radio frequency system |
| CN102185809B (en) * | 2011-05-06 | 2015-02-11 | 京信通信系统（中国）有限公司 | Remote radio frequency system |
| CN103684492A (en) * | 2012-09-24 | 2014-03-26 | 中兴通讯股份有限公司 | Radio frequency signal sampling device, a reception machine and a base station. |
| CN102932888A (en) * | 2012-11-12 | 2013-02-13 | 华为技术有限公司 | Method, device and system of data processing during idle listening |
| WO2014071890A1 (en) * | 2012-11-12 | 2014-05-15 | 华为技术有限公司 | Method, device and system for processing data during idle listening |
| RU2599724C1 (en) * | 2012-11-12 | 2016-10-10 | Хуавэй Текнолоджиз Ко., Лтд. | Method, device and system for processing data during listening in idle state |
| US9654870B2 (en) | 2012-11-12 | 2017-05-16 | Huawei Technologies Co., Ltd. | Method, device, and system for processing data during idle listening |
| CN104519518A (en) * | 2013-09-26 | 2015-04-15 | 北京锐安科技有限公司 | Portable WCDMA (Wideband Code Division Multiple Access) wireless signal field intensity measuring device |
| CN104519518B (en) * | 2013-09-26 | 2019-07-30 | 北京锐安科技有限公司 | A kind of portable WCDMA wireless signal field measuring device |
| CN109819465A (en) * | 2019-01-18 | 2019-05-28 | 珠海市联电科技有限公司 | A kind of indoor RRU positioning diagnosticing method, apparatus and system based on passive RFID tags |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102185809B (en) | Remote radio frequency system | |
| EP2953283B1 (en) | Method, apparatus, and radio remote unit for transmitting wireless base band data | |
| KR101829517B1 (en) | Remotely Reconfigurable Distributed Antenna System and Methods | |
| CN202035008U (en) | Radio frequency zooming system | |
| WO2012092810A1 (en) | Multimode digital radio-frequency remote system | |
| CN101304279B (en) | Radio frequency extension apparatus and base station system | |
| CN103379674A (en) | Multimode digital DAS supporting multi-information-source access | |
| CN102208940A (en) | Radio frequency system | |
| CN105406925A (en) | Multi-band frequency digital fiber distributed antenna system | |
| CN202503516U (en) | Transmission system supporting multiple communication modes | |
| WO2017171120A1 (en) | Base station signal matching device, and base station interface unit and distributed antenna system comprising same | |
| CN109618412B (en) | Novel 5G-oriented digital optical fiber distribution system and method for carrying out capacity scheduling on downlink and uplink by using same | |
| CN104320790A (en) | TDD (Time Division Duplex)-LTE (Long Term Evolution) multiple-input-multiple-output indoor coverage system | |
| CN102118778A (en) | Method and device for dynamic optimization of wireless communication system, and wireless communication system | |
| CN203574664U (en) | LTE digital double-channel transmission apparatus | |
| CN203387690U (en) | Multi-mode digital DAS supporting multi-source access | |
| CN101944956A (en) | Fiber access system and method of wireless signal based on tri-network integration | |
| CN201260163Y (en) | Radio frequency extension apparatus and base station system | |
| CN102111768A (en) | Multi-frequency band common networking method and device | |
| CN201243292Y (en) | Digital frequency selection optical fiber station | |
| CN201699704U (en) | Three-frequency wireless repeater | |
| CN112751575B (en) | Signal processing method, system and equipment | |
| CN101938448A (en) | CFR (Crest Factor Reduction) processing method and device with automatic carrier tracking function and communication system | |
| CN207266020U (en) | A kind of intelligent straight placement station | |
| CN202565279U (en) | Remote terminal for fiber far-pulling type wireless distribution system |
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: 20111109 Termination date: 20170506 |