CN205389205U - Synchronous device of principal and subordinate's equipment - Google Patents
Synchronous device of principal and subordinate's equipment Download PDFInfo
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- CN205389205U CN205389205U CN201521013826.8U CN201521013826U CN205389205U CN 205389205 U CN205389205 U CN 205389205U CN 201521013826 U CN201521013826 U CN 201521013826U CN 205389205 U CN205389205 U CN 205389205U
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Abstract
The utility model discloses a synchronous device of principal and subordinate's equipment, the device includes: the module is estimated to the host computer time, host computer local oscillator emission module, and the module is drawed from quick -witted local oscillator to host computer mixing module, follows quick -witted control module, this method includes: the host computer acquires baseband signal, makes baseband signal obtains the data signal who corresponds through analog -to -digital conversion, host computer received signal is correlated with through main synchronization signal and handles, obtains main synchronization signal's positional information, carries out the up -downgoing time slot and switches to generate local oscillator signal transmission and give from the machine, acquire host sends's local oscillator signal from the machine after, get into the first detector all the way, detecting through detection tube and obtain local oscillator signal level value in another way, obtains switching signal with reference level value after relatively through the comparator again, controls the machine of follow and carry out the switching of up -downgoing time slot. Through the utility model discloses a device can obtain host computer and purpose from machine carrier synchronization and time slot synchronization.
Description
Technical field
This technology belongs to wireless communication technology field, particularly relates to the master-slave equipment slot synchronization of a kind of LTE (LongTermEvolutionsystem, long evolving system) and the device of Frequency Synchronization.
Background technology
LTE system is thought quasi-4G wireless communication system widely, and it has the transfer rate of the up 50M of descending 100M.Domestic LTE adopts TDD (TimeDivisionDuplexing, time division duplex) and OFDM (OrthogonalFrequencyDivisionMultiplexing, OFDM) technology, receive and be transmitted in the different time-gap of same frequency channels (i.e. carrier wave), it is used for ensureing that time separation receives and transmits channel, and require that subcarrier spectrum is overlapped, and have strict orthogonality.For the LTE wireless communication system based on TDD technology, the up-downgoing switching of signal has strict time precision requirement, once big time error occurs in up-downgoing switching, whole TDD system is it would appear that paralyse.For from the frequency departure between transmitter Yu receiver local oscillator (LO, localoscillator), being referred to as carrier wave frequency deviation (CFO, carrierfrequencyoffset).CFO not only causes the phase place of demodulation constellation point to rotate thus affecting symbol judgement, and also the orthogonality between ofdm system subcarrier can be made to be destroyed, thus causing interfering (ICI between subcarrier, Intercarrierinterference), the degradation of systematic function is caused.Therefore, for adopting the LTE communication system of TDD and OFDM technology, strict time Estimate and Frequency Estimation to be carried out.
Utility model content
The deficiency aiming to overcome that prior art of utility model, it is provided that the device that a kind of master-slave equipment synchronizes, carries out slot synchronization and the Frequency Synchronization of master-slave equipment while carrying out time Estimate.
This utility model solves its technical problem and be the technical scheme is that the device providing a kind of master-slave equipment to synchronize, including: reception antenna, host time estimation module, main frame local oscillator transmitter module, main frame frequency mixing module, from machine local oscillator extraction module, from machine comparison module and transmission antenna；
Reception antenna: be used for obtaining baseband signal；
Host time estimation module: for carrying out relevant treatment to received signal, obtain master sync signal positional information, generates uplink and downlink timeslot switching switching signal；
Main frame local oscillator transmitter module: for carrying out uplink and downlink timeslot switching according to the positional information of master sync signal, and generate main frame local oscillation signal that host signal processes and from machine local oscillation signal according to uplink and downlink timeslot switching；
Main frame frequency mixing module: the local oscillation signal that baseband signal and the local oscillator transmitter module for reception antenna is received generates carries out Frequency mixing processing；
From machine local oscillator extraction module；Compare for the signal received transmission is extremely carried out signal from machine comparison module and then control to carry out uplink and downlink timeslot switching from machine；
From machine comparison module: be used for carrying out signal and compare and then control to carry out uplink and downlink timeslot switching from machine；
Transmission antenna；
The outfan of described reception antenna is connected with the input of the input of host time estimation module and main frame frequency mixing module respectively；The outfan of described host time estimation module is connected with the input of main frame local oscillator transmitter module；The outfan of described main frame local oscillator transmitter module input with the input of main frame frequency mixing module and from machine local oscillator extraction module respectively is connected；The outfan of described main frame frequency mixing module is connected with the input from machine local oscillator extraction module；The described outfan from machine local oscillator extraction module is connected with the input from machine comparison module；Described it is connected from the outfan of machine comparison module and the input of transmission antenna.
Preferably, described host time estimation module includes sampling unit and master sync signal correlation unit；The input of described sampling unit is as the input of host time estimation module, and the outfan of sampling unit is connected with the input of master sync signal correlation unit；The outfan of described master sync signal correlation unit is as the outfan of host time estimation module.
Preferably, main frame local oscillator transmitter module includes local oscillation generating unit and local oscillation signal processing unit；The input of described local oscillation generating unit is as the input of main frame local oscillator transmitter module, and the outfan of local oscillation generating unit is connected with the input of local oscillation signal processing unit；The outfan of described local oscillation signal processing unit is as the outfan of machine local oscillator transmitter module.
Preferably, from machine comparing unit with from machine mixing unit；The described outfan from machine local oscillator extraction module is connected with the input from machine comparing unit and from the input of machine mixing unit respectively；The described outfan from machine comparing unit is connected with the input from machine mixing unit；Described from the outfan of machine mixing unit as the outfan from machine comparison module.
Preferably, described sampling unit includes analog-digital converter, filtration module；The input of described analog-digital converter is as the input of sampling unit, and its outfan is connected with the input of filtration module；The outfan of described filtration module is as the outfan of sampling unit.
Preferably, described local oscillation signal processing unit includes crystal oscillator and VCO.
Preferably, described bonder, wave filter, amplifier are included from machine local oscillator extraction module；The input of described bonder is as the input from machine local oscillator extraction module, and its outfan is connected with the input of wave filter；The outfan of described wave filter is connected with the input of amplifier；The outfan of described amplification is as the outfan from machine local oscillator extraction module.
Preferably, described include from machine examination wave duct, from machine comparator, analog-digital chip from machine comparing unit；Described from machine examination wave duct as the input from machine comparing unit, its outfan is connected with from machine comparator；Described it is connected from the outfan of machine comparator and the input of analog-digital chip；The outfan of described analog-digital chip is as the outfan from machine comparing unit.
The beneficial effects of the utility model are:
The master-slave equipment synchronizer of a kind of LTE system of this utility model, by host time estimation module and main frame local oscillator transmitter module, the timing information obtained in master sync signal correlated process carries out uplink and downlink timeslot switching, and by main frame uplink and downlink timeslot handover information, generate local oscillation signal and be sent to from machine.Being divided into two-way after receiving local oscillation signal from machine, a road produces switching signal through detection tube and comparator, it is achieved from the purpose of machine uplink and downlink timeslot switching, and another road enters frequency mixer mixing, it is achieved the purpose of carrier synchronization.
Below in conjunction with drawings and Examples, this utility model is described in further detail；But the device that a kind of master-slave equipment of the present utility model synchronizes is not limited to embodiment.
Accompanying drawing explanation
The main machine structure block diagram that Fig. 1 this utility model embodiment provides；
Fig. 2 this utility model embodiment provide from machine structured flowchart；
The main frame sampling unit structured flowchart that Fig. 1-1 this utility model embodiment provides；
The main frame local oscillation signal processing unit structured flowchart that Fig. 1-2 this utility model embodiment provides；
Fig. 2-1 this utility model embodiment provide from machine local oscillator extraction module structured flowchart；
Fig. 2-2 this utility model embodiment provide from machine comparing unit structured flowchart；
The device workflow diagram that the master-slave equipment that Fig. 3 this utility model embodiment provides synchronizes.
Detailed description of the invention
Embodiment, referring to shown in Fig. 1 to Fig. 3, the device that a kind of master-slave equipment of the present invention synchronizes, including: reception antenna 107, host time estimation module 101, main frame local oscillator transmitter module 102, main frame frequency mixing module 108, from machine local oscillator extraction module 201, from machine comparison module 202 and transmission antenna 203；
Reception antenna 107: be used for obtaining baseband signal；
Host time estimation module 101: for carrying out relevant treatment to received signal, obtain master sync signal positional information, generates uplink and downlink timeslot switching switching signal；
Main frame local oscillator transmitter module 102: for carrying out uplink and downlink timeslot switching according to the positional information of master sync signal, and generate main frame local oscillation signal that host signal processes and from machine local oscillation signal according to uplink and downlink timeslot switching；
Main frame frequency mixing module 108: the local oscillation signal that baseband signal and the local oscillator transmitter module for reception antenna is received generates carries out Frequency mixing processing；
From machine local oscillator extraction module 201；Compare for the signal received transmission is extremely carried out signal from machine comparison module 202 and then control to carry out uplink and downlink timeslot switching from machine；
From machine comparison module 202: be used for carrying out signal and compare and then control to carry out uplink and downlink timeslot switching from machine；
The outfan of described reception antenna 107 is connected with the input of the input of host time estimation module 101 and main frame frequency mixing module 108 respectively；The outfan of described host time estimation module 101 is connected with the input of main frame local oscillator transmitter module 102；The outfan of described main frame local oscillator transmitter module 102 is connected from the input of machine local oscillator extraction module 201 with the input of main frame frequency mixing module 108 respectively；The outfan of described main frame frequency mixing module 108 is connected with the input from machine local oscillator extraction module 201；The described outfan from machine local oscillator extraction module 201 is connected with the input from machine comparison module 202；Described it is connected from the outfan of machine comparison module 202 with the input of transmission antenna 203.
Described host time estimation module 101 includes being sequentially connected sampling unit 106 and master sync signal correlation unit 105；Described sampling unit 106 includes analog-digital converter 116, filtration module 126.
Described main frame local oscillator transmitter module 102 includes the local oscillation generating unit 104 and the local oscillation signal processing unit 103 that are sequentially connected；Described local oscillation generating unit 104 includes crystal oscillator and VCO；Described local oscillation signal processing unit 103 includes signal selector 113, wave filter 123.
Described include from machine comparing unit 205 with from machine mixing unit 204 from machine comparison module 202；The described outfan from machine local oscillator extraction module 201 is connected with the input from machine comparing unit 205 and from the input of machine mixing unit 204 respectively；The described outfan from machine comparing unit 205 is connected with the input from machine mixing unit 204；Described from the outfan of machine mixing unit 204 as the outfan from machine comparison module 202；Described include from machine examination wave duct 215, from machine comparator 225, analog-digital chip 235 from machine comparing unit 205.
Described include bonder 211, wave filter 221, amplifier 231 from machine local oscillator extraction module 201.
Referring to shown in Fig. 1 to Fig. 3, the baseband signal that reception antenna 107 transmits is processed to obtain the positional information of master sync signal by host time estimation module 101, generates uplink and downlink timeslot switching switching signal, and transmits to main frame local oscillator transmitter module 102；
Described main frame local oscillator transmitter module 102 carries out uplink and downlink timeslot switching according to the positional information of master sync signal, and generates main frame local oscillation signal that host signal processes and from machine local oscillation signal according to uplink and downlink timeslot switching；
Described dividing two-way to send from machine local oscillation signal, lead up to after the baseband signal that main frame frequency mixing module 108 and reception antenna 107 receive is mixed and send to from machine local oscillator extraction module 201, another road is sent directly to from machine local oscillator extraction module 201；
Described send to carrying out signal from machine comparison module 202 relatively come and then control to carry out uplink and downlink timeslot switching from machine from machine local oscillator extraction module 201 by the signal received.
Baseband signal is carried out carrying out Filtering Processing after analog digital conversion obtains corresponding digital signal and obtains the time domain data of master sync signal by the sampling unit 106 in described host time estimation module 101；The time domain data of master sync signal is processed the positional information obtaining master sync signal by described master sync signal correlation unit 105.
Local oscillation generating unit 104 in described main frame local oscillator transmitter module 102 carries out uplink and downlink timeslot switching according to the positional information of master sync signal, and generates main frame local oscillation signal that host signal processes and from machine local oscillation signal；Described local oscillation signal processing unit 103 will carry out signal behavior and filtering from machine local oscillation signal.
It is described that from machine local oscillator extraction module 201, by the signal received, riches all the way delivers to being mixed from machine mixing unit 204 from machine comparison module 202；One tunnel enters and carries out detection from machine comparing unit 205 and obtain the level value from machine local oscillation signal, and obtains switching signal after comparing with reference level, and then controls to carry out uplink and downlink timeslot switching from machine mixing unit；Described reference level is to become to simulate reference level by numerical reference level conversion by analog-digital chip.
Main frame local oscillator transmitter module 102 controls to send descending time slot process to from machine local oscillator extraction module 201, stopping sending in signal uplink time slot process from machine local oscillation signal by master sync signal correlation unit.
Described master sync signal is three groups of signal P of R9 agreement regulation0、P1、P2；The process of master sync signal for receiving signal R, first respectively with three groups of local synchronizing signal P0、P1、P2Carry out related operationUsing the maximum 95% of correlation result as threshold value, and record the known main signal P obtaining maximumk；Followed by related operationWhen correlation result is more than threshold value, represent the position having determined that master sync signal.
The device that embodiment of the present invention master-slave equipment synchronizes, comprises the following steps during work:
S301: main frame obtains baseband signal by reception antenna 107, makes described baseband signal through analog-digital converter 116 analog digital conversion, obtains the digital signal of correspondence；
S302: be filtered the filtered module 126 of described digital signal processing, obtain the time domain data comprising master sync signal；
S303: extract described time-domain signal through master sync signal correlation module 105, carry out relevant treatment, the positional information of the master sync signal obtained；
S304: main frame obtains the positional information of master sync signal according to master sync signal correlation module 105, carries out uplink and downlink timeslot switching；
S305: main frame, according to uplink and downlink timeslot handover information, generates local oscillation signal by local oscillation generating unit 104 and is sent to from machine；
Main frame according to the process of uplink and downlink timeslot handover information generation local oscillator is, produces switching signal control local oscillator by master sync signal correlation unit and is sent extremely from machine by transmitting chain in signal downlink time slot process, and stops transmission in signal uplink time slot process；
S306: after obtaining, from machine, the local oscillation signal that main frame sends, a road enters mixing unit 204, and another road enters and obtains local oscillation signal level value from machine comparing unit 205 through carrying out detection from machine examination wave duct 215；
After sending signal from machine Receiving Host, after overcoupling, filtering, amplification, extract local oscillation signal；
S307: after obtaining local oscillation signal level value from machine, by from machine comparator 225 with obtaining switching signal after reference level, control carry out uplink and downlink timeslot switching from machine；
Arrange from machine comparator 225 reference level, be adopt analog-digital chip 235 by controller, it would be desirable to the numerical reference level value of setting converts simulation reference level to.
Above-described embodiment is only used for further illustrating the apparatus and method that a kind of master-slave equipment of the present utility model synchronizes; but this utility model is not limited to embodiment; every any simple modification, equivalent variations and modification above example made according to technical spirit of the present utility model, each falls within the protection domain of technical solutions of the utility model.
Claims (8)
1. the device that a master-slave equipment synchronizes, it is characterised in that including: reception antenna, host time estimation module, main frame local oscillator transmitter module, main frame frequency mixing module, from machine local oscillator extraction module, from machine comparison module and transmission antenna；
Reception antenna: be used for obtaining baseband signal；
Host time estimation module: for carrying out relevant treatment to received signal, obtain master sync signal positional information, generates uplink and downlink timeslot switching switching signal；
Main frame local oscillator transmitter module: for carrying out uplink and downlink timeslot switching according to the positional information of master sync signal, and generate main frame local oscillation signal that host signal processes and from machine local oscillation signal according to uplink and downlink timeslot switching；
Main frame frequency mixing module: the local oscillation signal that baseband signal and the local oscillator transmitter module for reception antenna is received generates carries out Frequency mixing processing；
From machine local oscillator extraction module；Compare for the signal received transmission is extremely carried out signal from machine comparison module and then control to carry out uplink and downlink timeslot switching from machine；
From machine comparison module: be used for carrying out signal and compare and then control to carry out uplink and downlink timeslot switching from machine；
Transmission antenna；
The outfan of described reception antenna is connected with the input of the input of host time estimation module and main frame frequency mixing module respectively；The outfan of described host time estimation module is connected with the input of main frame local oscillator transmitter module；The outfan of described main frame local oscillator transmitter module input with the input of main frame frequency mixing module and from machine local oscillator extraction module respectively is connected；The outfan of described main frame frequency mixing module is connected with the input from machine local oscillator extraction module；The described outfan from machine local oscillator extraction module is connected with the input from machine comparison module；Described it is connected from the outfan of machine comparison module and the input of transmission antenna.
2. the device that a kind of master-slave equipment according to claim 1 synchronizes, it is characterised in that: described host time estimation module includes sampling unit and master sync signal correlation unit；The input of described sampling unit is as the input of host time estimation module, and the outfan of sampling unit is connected with the input of master sync signal correlation unit；The outfan of described master sync signal correlation unit is as the outfan of host time estimation module.
3. the device that a kind of master-slave equipment according to claim 1 synchronizes, it is characterised in that: main frame local oscillator transmitter module includes local oscillation generating unit and local oscillation signal processing unit；The input of described local oscillation generating unit is as the input of main frame local oscillator transmitter module, and the outfan of local oscillation generating unit is connected with the input of local oscillation signal processing unit；The outfan of described local oscillation signal processing unit is as the outfan of machine local oscillator transmitter module.
4. the device that a kind of master-slave equipment according to claim 1 synchronizes, it is characterised in that: described include from machine comparing unit with from machine mixing unit from machine comparison module；The described outfan from machine local oscillator extraction module is connected with the input from machine comparing unit and from the input of machine mixing unit respectively；The described outfan from machine comparing unit is connected with the input from machine mixing unit；Described from the outfan of machine mixing unit as the outfan from machine comparison module.
5. the device that a kind of master-slave equipment according to claim 2 synchronizes, it is characterised in that: described sampling unit includes analog-digital converter, filtration module；The input of described analog-digital converter is as the input of sampling unit, and its outfan is connected with the input of filtration module；The outfan of described filtration module is as the outfan of sampling unit.
6. the device that a kind of master-slave equipment according to claim 3 synchronizes, it is characterised in that: described local oscillation signal processing unit includes crystal oscillator and VCO.
7. the device that a kind of master-slave equipment according to claim 1 synchronizes, it is characterised in that: described include bonder, wave filter, amplifier from machine local oscillator extraction module；The input of described bonder is as the input from machine local oscillator extraction module, and its outfan is connected with the input of wave filter；The outfan of described wave filter is connected with the input of amplifier；The outfan of described amplification is as the outfan from machine local oscillator extraction module.
8. the device that a kind of master-slave equipment according to claim 4 synchronizes, it is characterised in that: described include from machine examination wave duct, from machine comparator, analog-digital chip from machine comparing unit；Described from machine examination wave duct as the input from machine comparing unit, its outfan is connected with from machine comparator；Described it is connected from the outfan of machine comparator and the input of analog-digital chip；The outfan of described analog-digital chip is as the outfan from machine comparing unit.
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| CN201521013826.8U CN205389205U (en) | 2015-12-09 | 2015-12-09 | Synchronous device of principal and subordinate's equipment |
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| CN201521013826.8U CN205389205U (en) | 2015-12-09 | 2015-12-09 | Synchronous device of principal and subordinate's equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105577353A (en) * | 2015-12-09 | 2016-05-11 | 厦门特力通通信工程有限公司 | Master and slave equipment synchronization device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105577353A (en) * | 2015-12-09 | 2016-05-11 | 厦门特力通通信工程有限公司 | Master and slave equipment synchronization device and method |
| CN105577353B (en) * | 2015-12-09 | 2018-08-24 | 厦门特力通通信工程有限公司 | A kind of method that master-slave equipment synchronizes |
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