CN203537573U - Base station uplink signal processing device - Google Patents
Base station uplink signal processing device Download PDFInfo
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- CN203537573U CN203537573U CN201320617437.0U CN201320617437U CN203537573U CN 203537573 U CN203537573 U CN 203537573U CN 201320617437 U CN201320617437 U CN 201320617437U CN 203537573 U CN203537573 U CN 203537573U
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Abstract
The utility model provides a base station uplink signal processing device comprising a first uplink and a first downlink. The first uplink and the first downlink comprise a shared first MT-end duplexer/ circulator and a shared first DT-end duplexer/ circulator, and the first uplink further comprises a digital processor connected between the first MT-end duplexer/ circulator and the first DT-end duplexer/ circulator. The base station uplink signal processing device having a function of adjusting the uplink receiving time delaying of a wireless base station is connected between a base station antenna and a base station receiver. By employing the base station uplink signal processing device, the restriction of uplink multipath reception windows of a mobile communication system is solved, digital remote radio frequency units such as GRRU, CRRU, WRRU and the like can be freely applied in various scenes, and the covering area of the base station can be accurately controlled.
Description
Technical field
The utility model relates to communication technical field, particularly relates to a kind of base station upward signal processing unit.
Background technology
Mobile communications network can be divided into three parts substantially: travelling carriage, wireless access network and core net.Wherein, wireless access network comprises radio network controller and base station.Base station signal is shot out signal amplitude by antenna-feedback system, coverage goal region.But the unavoidable chlamydate weak district of base station coverage mode, blind area, this mobile communication base station of day by day improving for quality of service requirement is a general difficult problem.GRRU/CRRU/WRRU radio frequency stretch system (GRRU:GSM Digital Remote RF Units; CRRU:CDMA Digital Remote RF Units; WRRU:WCDMA Digital Remote RF Units) and other radio frequency stretch systems introduce base station signals, amplified coverage goal region.Radio frequency stretch system can expand base station range, eliminates coverage hole, solves the covering problem of indoor or special screne.
Yet, existing GRRU/CRRU/WRRU and other radio frequency stretch systems are because time delay is larger, add radiofrequency signal in Optical Fiber Transmission time delay much larger than aerial propagation delay time, the multidiameter delay poor multipath reception window that tend to be greater than mobile communication system of travelling carriage when radio frequency stretch system and the overlapping area of coverage in information source community, thereby as shown in Figure 1, at this moment in the time of can causing travelling carriage to be conversed in the overlapping area of coverage of base station and GRRU/CRRU/WRRU remote termination, transmitting power raises, travelling carriage itself not only can call drop, and at the bottom of can lifting base station, make an uproar and affect it and normally cover, thereby limited the application of the digital RF far-drawing systems such as GRRU/CRRU/WRRU.
For this problem, conventional method is that information source is only done in base station, and signal own does not cover, and all adopts GRRU/CRRU/WRRU remote termination to cover.Cause the waste of base station signal power, not only increased construction cost, and not energy-conserving and environment-protective, and make GRRU/CRRU/WRRU when coupling macro station signal covers, be subject to larger restriction.
Utility model content
Based on this, be necessary to exceed for uplink receiving the high problem of the uplink communication error rate that base station multipath reception window scope causes, a kind of base station upward signal processing unit is provided.It can solve the restriction of mobile communication system multipath reception window, and the radio frequency remote equipments such as GRRU/CRRU/WRRU can freely be applied in various scenes; In addition it also can be used for accurately controlling the coverage of base station.
The purpose of this utility model is achieved through the following technical solutions:
A kind of base station upward signal processing unit, comprise the first up link and the first down link, described the first up link and described the first down link comprise a shared MT end duplexer/circulator and DT end duplexer/circulator, and described the first up link also comprises the digital processing unit being connected between a described MT end duplexer/circulator and a described DT end duplexer/circulator.
According to above-mentioned scheme of the present utility model, base station upward signal processing unit can be connected between antenna for base station (or other receiving systems) and base station receiver, also can be set directly at radio frequency stretch system near-end machine.At antenna for base station, receive after the up radiofrequency signal of travelling carriage, be input to before base station receiver, by digital processing unit, adjust the time delay that mobile station signal arrives base station, thereby, the radio frequency remote equipments such as GRRU/CRRU/WRRU can freely be applied in various scenes, help to build the mobile communication base station of seamless coverage, meanwhile, can accurately control by the adjustment of uplink receiving time delay the coverage of base station.
Accompanying drawing explanation
Fig. 1 is mobile communication base station multipath reception window restriction schematic diagram;
Fig. 2 is the structural representation (FDD system) of the utility model base station upward signal processing unit embodiment mono-;
Fig. 3 is the structural representation (TDD system) of the utility model base station upward signal processing unit embodiment bis-;
Fig. 4 is the utility model base station upward signal processing unit the first application schematic diagram;
Fig. 5 is the refined structure schematic diagram of the digital processing unit in Fig. 3 or Fig. 4;
Fig. 6 is the structural representation (FDD system) of the utility model base station upward signal processing unit embodiment tri-;
Fig. 7 is the structural representation of the utility model remote radio coupling unit;
Fig. 8 is the utility model base station upward signal processing unit the second application schematic diagram.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is elaborated, but execution mode of the present utility model is not limited to this.
Base station of the present utility model upward signal processing unit both can be applied to FDD(Time Division Duplexing, time division duplex) system, also can be applied to TDD(Frequency Division Duplexing, Frequency Division Duplexing (FDD)) system, the main distinction is, what in FDD system, adopt is MT end duplexer and DT end duplexer, and what in TDD system, adopt is MT end circulator and DT end circulator.Take respectively FDD system, TDD system below describes as example.
Shown in Figure 2, for for FDD system, the structural representation of base station upward signal processing unit embodiment mono-of the present utility model.As shown in Figure 2, base station upward signal processing unit in the present embodiment comprises the first up link 101 and the first down link 102, wherein, the first up link 101 and the first down link 102 comprise that respectively its two MT end duplexer 103 sharing, DT end duplexer 104, the first up links 101 also comprise the digital processing unit 105 being connected between a MT end duplexer 103 and DT end duplexer 104.
Shown in Figure 3, for for TDD system, the structural representation of base station upward signal processing unit embodiment bis-of the present utility model.As shown in Figure 3, base station upward signal processing unit in the present embodiment comprises the first up link 201 and the first down link 202, wherein, the first up link 201 and the first down link 202 comprise that respectively its two MT end circulator 203 sharing, DT end circulator 204, the first up links 201 also comprise the digital processing unit 205 being connected between a MT end circulator 203 and DT end circulator 204.
When specific works, the one MT end duplexer 103/MT end circulator 203 receives by the covering/reception antenna (or other receiving systems) of base station the up radiofrequency signal that travelling carriage sends from space, the travelling carriage here generally refers to the equipment that in mobile radio communication, mobile subscriber uses, can be divided into vehicle-mounted type, pocket and handheld, for example mobile phone is handheld, up radiofrequency signal is sent to digital processing unit 105/205 through the uplink receiving port of a MT end duplexer 103/MT end circulator 203, digital processing unit 105/205 can be modulated to digital signal by up radiofrequency signal, therefore, can in digital processing unit 105/205, increase instruction adjusts arbitrarily digital signal time delay, finally, the up radiofrequency signal of adjusting through time delay arrives base station receiver through a DT end duplexer 104/DT end circulator 204.Wherein, signal time delay can obtain the time delay time of remote termination by the form of obtaining, and such as: time delay can be the time delay of overlapping covered remote termination, also can be set as specifying the time delay of remote termination.Adopt up radiofrequency signal that this adjustment travelling carriage sends to arrive the mode of the time delay of base station, can eliminate the restriction of multipath search window to base station receiving mobile signal, the high problem of uplink error rate of having avoided uplink receiving to exceed multipath reception window scope and having caused, and cause thus the problem of whole community a series of KPI index variation.
In addition, base station of the present utility model upward signal processing unit can be preferably and the radio frequency stretch system fit applications such as GRRU/CRRU/WRRU, there is good application prospect, this is to consider, restriction due to base stations in mobile communication system multipath search window, the radio frequency stretch systems such as the GRRU/CRRU/WRRU community in the same way that can not be coupled covers, and adopt community dorsad can bring pilot pollution and the excessive problem of soft handover area, limited greatly the application of the radio frequency stretch systems such as GRRU/CRRU/WRRU, and use after the upward signal processing unit of base station, the radio frequency stretch systems such as GRRU/CRRU/WRRU can be eliminated the restriction of community dorsad that can only be coupled, expand greatly its scope of application, simultaneously, consider, need accurately to control the coverage of base station, but because the precision of the adjustment of base station itself is thicker, cannot accomplish small adjustment, and digital processing unit 105/205 of the present utility model can be hundreds of microsecond to the up radiofrequency signal amplitude of carrying out, stepping is the time delay adjustment of nanosecond, the accurate control of realization to up radiofrequency signal time delay, as adopt SDR(Software Defining Radio) signal processing technology realize, therefore, also can realize by radio communication base station uplink receiving time delay adjusting device of the present utility model the small adjustment of time delay, thereby accurately control the coverage of base station.
In actual applications, device of the present utility model can be connected between antenna for base station and base station receiver.Shown in Figure 4, be base station of the present utility model upward signal processing unit the first application schematic diagram, it is connected between antenna for base station (cover antenna/reception antenna) and base station receiver, is used in conjunction with digital RF far-drawing system.
Therein in an embodiment, as shown in Figure 2, base station of the present utility model upward signal processing unit can also comprise the by-pass unit in parallel with digital processing unit 105 106, as shown in Figure 3, base station of the present utility model upward signal processing unit can also comprise the by-pass unit in parallel with digital processing unit 205 206, by-pass unit 106/206 can demand working when digital processing unit breaks down, effectively avoid active device fault to exert an influence to base station, wherein, by-pass unit 106/206 can comprise fault judging unit 1061/2061 and by-pass switch 1062/2062, whether this fault judging unit 1061/2061 can break down for monitoring digital processing unit 105/205, if broken down, by-pass switch 1062/2062 conducting.Wherein, by-pass unit 106/206 and fault judging unit 1061/2061 and by-pass switch 1062/2062 can adopt existing device to realize, and do not repeat them here.
In an embodiment, digital processing unit comprises the low-converter connecting successively, uplink baseband processing unit, upconverter therein.Low-converter is for downconverting to analog if signal to the up radiofrequency signal receiving.Uplink baseband processing unit is modulated into digital signal for the analog if signal that down-conversion is formed, and this digital signal is being carried out being reduced to analog if signal after time delay adjustment.Up-converter module carries out up-conversion for the analog if signal to after reduction makes it be reduced to up radiofrequency signal.
Therein in an embodiment, as shown in Figure 5, digital processing unit 105/205 can comprise low noise amplifier 301, the low-converter 302 connecting successively, uplink baseband processing unit 303, upconverter 304, upstream amplifier 305, wherein, uplink baseband processing unit 303 may further include A/D converter, digital filter, the D/A converter connecting successively, the FDD system of take below describes the course of work of the base station upward signal processing unit of the present embodiment as example, similarly, not in this to go forth for FDD system.
First, MT end duplexer 101 receives the signal of travelling carriage from space by covering/reception antenna, obtain up radiofrequency signal after filtering unwanted signal;
Then, up radiofrequency signal, after low noise amplifier 301, is amplified signal amplitude, then is passed through low-converter 302, and up radiofrequency signal is downconverted to analog if signal;
And then, analog if signal is after the A/D converter sample of uplink baseband processing unit 303, after Digital Down Convert passage, become baseband signal, baseband signal is after the digital filter filtering of baseband processing unit 303, through Digital Up Convert passage, upconvert to digital radio signal again, finally by D/A converter, be transformed to analog if signal, in Base-Band Processing process, owing to radiofrequency signal being modulated to digital signal, therefore can increase instruction carries out time delay processing to digital signal;
Finally, analog if signal up-converts to radiofrequency signal through upconverter 304, then through upstream amplifier 305 by after signal amplitude, be input to base station receiver.
In an embodiment, this device also comprises remote radio coupling unit therein, and remote radio coupling unit comprises coupler and radio frequency stretch system near-end machine.By remote radio coupling unit, obtain the time delay of the default remote termination of radio frequency stretch system, such as obtaining time delay time of remote termination of the overlapping area of coverage or the remote termination of appointment, then adjust.Uplink baseband processing unit, is modulated into digital signal for the analog if signal that down-conversion is formed, and according to time delay, digital signal is carried out to time delay adjustment, and the digital signal after adjusting is reduced to analog if signal.Now, the utility model can be used as an independent integral body and is connected with base station with radio frequency stretch system, also can combine together with the near-end machine of radio frequency stretch system, in same controller, controls, and is convenient to obtain the time delay of the default remote termination of radio frequency stretch system.
In an embodiment, can realize base station uplink receiving and all remote termination uplink receiving Delay Synchronizations therein.Also comprise remote radio coupling unit, remote radio coupling unit comprises coupler and radio frequency stretch system near-end machine.Remote radio coupling unit is for obtaining the time delay of the default remote termination of radio frequency stretch system, to each remote termination of radio frequency stretch system and uplink baseband processing unit transmission delay.Wherein, default remote termination is made as the remote termination of time delay maximum in remote termination.Uplink baseband processing unit, is modulated into digital signal for the analog if signal that down-conversion is formed, and according to time delay, digital signal is carried out to time delay adjustment, and the digital signal after adjusting is reduced to analog if signal.Each remote termination receive time delay, carries out time delay adjustment according to time delay.Now, the system of the utility model adjustment base station uplink receiving time delay can be used as an integral body and is connected with base station with radio frequency stretch system, also can combine together with the near-end machine of radio frequency stretch system, in same controller, control, be convenient to obtain the time delay of the remote termination of radio frequency stretch system time delay maximum.
Fig. 6 shows the system for FDD, the utility model base station upward signal processing unit embodiment tri-structural representations.TDD system and FDD system class seemingly, do not repeat them here.
As shown in Figure 6, in an embodiment, can comprise that MT end duplexer 601, low-converter 602, remote radio coupling unit 603, uplink baseband processing unit 604, upconverter 605, DT hold duplexer 606 therein, wherein:
MT holds duplexer 601, the up radiofrequency signal sending for receiving user side;
Low-converter 602, for downconverting to analog if signal to the up radiofrequency signal receiving;
Remote radio coupling unit 603, for obtaining the time delay of each remote termination of radio frequency stretch system, determines maximum delay, and to each remote termination forward delay interval instruction of radio frequency stretch system, delay time is maximum delay, and sends maximum delay to up baseband processing unit;
Uplink baseband processing unit 604, is modulated into digital signal for the analog if signal that down-conversion is formed, and according to maximum delay, digital signal is carried out to time delay adjustment, and the digital signal after adjusting is reduced to analog if signal;
Upconverter 605, carries out up-conversion for the analog if signal to after reduction and makes it be reduced to up radiofrequency signal;
DT holds duplexer 606, for the up radiofrequency signal of exporting after reduction, arrives base station receiver.
Each remote termination of radio frequency stretch system zooms out for received RF the time-delay command that coupling unit sends, and carries out the time delay adjustment of synchronizeing with base station time delay according to instruction.Obtain the time delay of each remote termination of radio frequency stretch system, selecting time delay is maximum time delay, to other remote terminations of radio frequency stretch system, send this maximum delay, other remote terminations of radio frequency stretch system also carry out time delay adjustment according to this maximum delay, thereby make base station uplink receiving and all remote termination uplink receiving Delay Synchronizations.
In specific embodiment, as Fig. 7, be the structural representation of the utility model remote radio coupling unit, the utility model and digital RF far-drawing system near-end machine are controlled by same control chip.Wherein, remote radio coupling unit comprises coupler 701 and radio frequency stretch system near-end machine 702.Radio frequency stretch system near-end machine 702 comprises the second up link and the second down link, the second up link and the second down link comprise the 2nd shared MT end duplexer/circulator 7022, the 2nd DT end duplexer/circulator 7024 and transmission unit 7021, the second up link also comprises the up RF processing unit 7023 being connected between the 2nd MT end duplexer/circulator 7022 and the 2nd DT end duplexer/circulator 7024, the second down link also comprises the downlink radio frequency processing unit 7025 being connected between the 2nd MT end duplexer/circulator 7022 and the 2nd DT end duplexer/circulator 7024, the 2nd MT end duplexer/circulator is connected with transmission unit, the 2nd DT end duplexer/circulator is connected with coupler, the one DT end duplexer/circulator is connected with base station by coupler.
In actual applications, the system of adjustment of the present utility model base station uplink receiving time delay can be connected between antenna for base station and base station receiver, is arranged at radio frequency stretch system near-end.Shown in Figure 8, be the utility model base station upward signal processing unit the second application schematic diagram, it is connected between antenna for base station (cover antenna/reception antenna) and base station receiver, controls in same controller with digital RF far-drawing system near-end machine.
Certainly, with remote radio coupling unit base station upward signal processing unit, also can comprise the by-pass unit in parallel with digital processing unit.By-pass unit can comprise fault judging unit and by-pass switch.Digital processing unit can comprise low noise amplifier, the low-converter connecting successively, uplink baseband processing unit, upconverter, upstream amplifier.Specifically similar as above, do not repeat them here.
Above-mentioned base station of the present utility model upward signal processing unit, can utilize special-purpose asic chip to realize, and also can utilize the programmable logic devices such as DSP, FPGA, EPLD to realize.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (9)
1. a base station upward signal processing unit, it is characterized in that, comprise the first up link and the first down link, described the first up link and described the first down link comprise a shared MT end duplexer/circulator and DT end duplexer/circulator, and described the first up link also comprises the digital processing unit being connected between a described MT end duplexer/circulator and a described DT end duplexer/circulator.
2. base station according to claim 1 upward signal processing unit, is characterized in that, also comprises remote radio coupling unit, and described remote radio coupling unit comprises coupler and radio frequency stretch system near-end machine.
3. base station according to claim 2 upward signal processing unit, it is characterized in that, described radio frequency stretch system near-end machine comprises the second up link and the second down link, described the second up link and described the second down link comprise the 2nd shared MT end duplexer/circulator, the 2nd DT end duplexer/circulator and transmission unit, described the second up link also comprises the up RF processing unit being connected between described the 2nd MT end duplexer/circulator and described the 2nd DT end duplexer/circulator, described the second down link also comprises the downlink radio frequency processing unit being connected between described the 2nd MT end duplexer/circulator and described the 2nd DT end duplexer/circulator, described the 2nd MT end duplexer/circulator is connected with described transmission unit, described the 2nd DT end duplexer/circulator is connected with described coupler, a described DT end duplexer/circulator is connected with base station by coupler.
4. base station according to claim 1 upward signal processing unit, is characterized in that, also comprises the by-pass unit in parallel with described digital processing unit.
5. base station according to claim 4 upward signal processing unit, is characterized in that, described by-pass unit comprises fault judging unit and by-pass switch.
6. according to the base station upward signal processing unit described in claim 1 to 5 any one, it is characterized in that, described digital processing unit comprises the low-converter connecting successively, uplink baseband processing unit, upconverter.
7. according to the base station upward signal processing unit described in claim 1 to 5 any one, it is characterized in that, described digital processing unit comprises low noise amplifier, the low-converter connecting successively, uplink baseband processing unit, upconverter, upstream amplifier.
8. base station according to claim 6 upward signal processing unit, is characterized in that, described uplink baseband processing unit comprises A/D converter, digital filter, the D/A converter connecting successively.
9. base station according to claim 7 upward signal processing unit, is characterized in that, described uplink baseband processing unit comprises A/D converter, digital filter, the D/A converter connecting successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617437.0U CN203537573U (en) | 2013-10-08 | 2013-10-08 | Base station uplink signal processing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617437.0U CN203537573U (en) | 2013-10-08 | 2013-10-08 | Base station uplink signal processing device |
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| CN203537573U true CN203537573U (en) | 2014-04-09 |
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| CN201320617437.0U Expired - Fee Related CN203537573U (en) | 2013-10-08 | 2013-10-08 | Base station uplink signal processing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105594135A (en) * | 2014-08-14 | 2016-05-18 | 华为技术有限公司 | Signal processing method and related device and apparatus |
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2013
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105594135A (en) * | 2014-08-14 | 2016-05-18 | 华为技术有限公司 | Signal processing method and related device and apparatus |
| US10158399B2 (en) | 2014-08-14 | 2018-12-18 | Huawei Technologies Co., Ltd. | Signal processing method and related device and apparatus |
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| CF01 | Termination of patent right due to non-payment of annual fee |