CN102972090A - Apparatus for calibrating transceivers and method for determining signal characteristic differences caused by transceivers - Google Patents

Apparatus for calibrating transceivers and method for determining signal characteristic differences caused by transceivers Download PDF

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CN102972090A
CN102972090A CN2011800014545A CN201180001454A CN102972090A CN 102972090 A CN102972090 A CN 102972090A CN 2011800014545 A CN2011800014545 A CN 2011800014545A CN 201180001454 A CN201180001454 A CN 201180001454A CN 102972090 A CN102972090 A CN 102972090A
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trx
signal
loop
caused
raw digital
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CN102972090B (en
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何平华
李少明
刘学儒
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract

An apparatus for calibrating transceivers comprises: N digital beam forming modules, N transceivers one-to-one corresponding to the digital beam forming modules and N couplers one-to-one corresponding to the transceivers, and further comprises a first calibration channel, a second calibration channel, a main connection line and a processor. Both the main connection line and the processor are located between the first calibration channel and the second calibration channel. Each coupler is connected to the main connection line at one end and connected to a corresponding transceiver at the other end. The processor, the digital beam forming modules, the transceivers one-to-one corresponding to the digital beam forming modules, the couplers one-to-one corresponding to the transceivers, the main connection line, the first calibration channel and the processor are sequentially connected to form a first loop. The processor, the digital beam forming modules, the transceivers one-to-one corresponding to the digital beam forming modules, the couplers one-to-one corresponding to the transceivers, the main connection line, the second calibration channel and the processor are sequentially connected to form a second loop. The processor determines, according to equations that a characteristic difference between a digital signal obtained after the first loop processes an original digital signal and the original digital signal equals a sum of signal characteristic differences caused by the first loop and that a characteristic difference between a digital signal obtained after the second loop processes an original digital signal and the original digital signal equals a sum of signal characteristic differences caused by the second loop, differences between a signal characteristic difference caused by a reference transceiver and signal characteristic differences caused by other transceivers.

Description

Signal characteristic difference condition caused by TRX calibrator (-ter) units and TRX determines method
Signal characteristic difference condition determines method and technology field caused by transceiver calibrator (-ter) unit and transceiver
The present invention relates to communication technical field, signal characteristic difference condition caused by more particularly to a kind of transceiver T RX calibrator (-ter) units and TRX determines method.Background technology
Being connected to the inside of base station of multiple antennas typically has multiple transceivers (Transceiver, cylinder claims TRX), in order to form satisfactory radiation lobe figure in the air（Radiation pattern), it is required that the amplitude of every road signal of excitation multiple antennas, phase, delay feature have to comply with specific distribution, that is to say, that it is required that the amplitude of every road transceiver output signal, phase, delay feature meet specific distribution.But even if same device is all used per road transceiver, but be due to that the core devices of transceiver are still analog device, thus per the feature difference of the signal caused by the transceiver of road（That is the amplitude of signal, phase, delay variance）Still may be different, so needing to compensate the feature difference of the signal caused by every road transceiver, i.e., transceiver is calibrated.
Fig. 1 shows a kind of base station structure diagram for use parallel calibration mode that prior art is provided, in order to clearly illustrate to be also shown for aerial array in the prior art, Fig. 1（Radiation Array ).Wherein, base station includes two parts, i.e. RRU (Radio Remote Unit, Remote Radio Unit）With BBU (Building Base band Unit, indoor baseband processing unit）.Interface between RRU and BBU is CPRI (Common Public Radio Interface, common public radio interface）.Include inside RRU：S/P modules, COM modules, multiple DBF (Digital Beam Forming, digital beam shaping）Module, multiple TRX and multiple CP (Coupler, coupler）, multiplexer（), Multiplexer calibration channel (Calibration channel).Wherein, S/P modules are serioparallel exchange module, signal that it receives CPRI, from BBU（Such as it is used for the signal calibrated, cylinder claims original calibration signals）Carry out serioparallel exchange, obtain multichannel I/Q signal, it is assumed to be N roads I/Q signal, N roads I/Q signal is separately input in N number of DBF modules, N number of DBF modules are in completely the same original state, and the output signal of N number of DBF modules is input in N number of TRX, N number of TRX is modulated to signal, demodulated, Up/Down Conversion, amplification, filtering, A/D, the processing such as D/A, aerial array is sent to by the radiofrequency signal after processing.N number of CP extracts the radiofrequency signal that N number of TRX modules are sent to aerial array respectively, is sent to multiplexer, and multiplexer is by N The radiofrequency signal that individual CP is sent is multiplexed into calibration channel, final calibration signal is obtained after the processing such as each road radiofrequency signal is modulated, demodulated by calibration channel, Up/Down Conversion, filtering, A/D, D/A, seek the difference of final calibration signal and primary standard signal, and then obtain the signal characteristic difference caused by N number of TRX, then each DBF module is controlled to carry out feature compensation, to be calibrated to TRX.
Each CP parallel connection in such scheme, can only be known per TRX to CP all the way due to calibrated channel,
CP is to multiplexer, the feature difference of multiplexer to calibrated channel, but cannot be distinguished by this feature difference is caused by TRX, or caused by CP to the line of multiplexer, so in order to seek the signal characteristic difference caused by N number of TRX, it is desirable to which each road CP is identical to the signal characteristic difference caused by the path of calibrated channel.
Fig. 2 shows a kind of base station structure diagram using serial calibrating mode that prior art is provided, and Fig. 2 and Fig. 1 differences are：Each CP one end order is connected on main connecting line, and each CP other end is connected with each self-corresponding TRX, in order to seek the signal characteristic difference caused by N number of TRX, it is necessary to measure each CP to the signal characteristic difference caused by the path of calibrated channel.
Existing serial calibrating mode has as a drawback that：
In order to seek the signal characteristic difference caused by N number of TRX, it is necessary to measure each CP to the signal characteristic difference caused by the path of calibrated channel.The content of the invention
The embodiment of the present invention a kind of transceiver T RX calibrator (-ter) units and TRX are provided caused by signal characteristic difference condition determine method, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, the signal characteristic difference condition caused by TRX is can be obtained by, so as to carry out accurate calibration to each TRX.
One aspect of the present invention is provided：
A kind of transceiver T RX calibrator (-ter) units, it includes：N number of digital beam forming module DBF, N and DBF --- corresponding TRX, N number of with TRX --- corresponding coupler CP, N is more than or equal to 2, also include the first calibrated channel and the second calibrated channel, main connecting line between the first calibrated channel and the second calibrated channel, N number of CP one end connects the main connecting line, the other end connects each self-corresponding TRX, and the TRX calibrator (-ter) units also include processor；
Wherein, processor, DBF, corresponding CP, main connecting line, the first calibrated channel, processor, which are linked in sequence, to form the first loop with the DBF --- corresponding TRX, with the TRX ---；Processing Device, DBF, corresponding CP, main connecting line, the second calibrated channel, processor, which are linked in sequence, to form the second loop with the DBF --- corresponding TRX, with the TRX ---；
The processor, for sending raw digital signal, receives first loop and second loop to the data signal after raw digital signal processing respectively；When signal characteristic difference is identical caused by each DBF, signal characteristic difference sum caused by being equal to the first loop to the data signal and the feature difference of raw digital signal after raw digital signal processing according to the first loop, and second loop to the raw digital signal processing after data signal and raw digital signal feature difference be equal to the second loop caused by signal characteristic difference sum, determine the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.
Another aspect of the present invention is provided：
A kind of TRX calibrator (-ter) units, it includes：N number of digital beam forming module DBF, N number of with DBF --- corresponding TRX, N number of with TRX --- corresponding coupler CP, N are more than or equal to 2, also include calibrated channel, main connecting line with first end and the second end, N number of CP one end connects the main connecting line, and the other end connects each self-corresponding TRX;
Wherein, calibrated channel under the control of a processor, connects the first end of main connecting line or second end；When calibrated channel connects the first end, processor, DBF, corresponding CP, calibrated channel, processor, which are linked in sequence, to form the first loop with the DBF --- corresponding TRX, with the TRX ---；When calibrated channel connects second end, processor, DBF, corresponding CP, calibrated channel, processor, which are linked in sequence, to form the second loop with the DBF --- corresponding TRX, with the TRX ---；
The processor, for controlling calibrated channel to connect the first end or second end, when calibrated channel connects the first end, sends raw digital signal, receives first loop to the data signal after raw digital signal processing；When calibrated channel connects second end, raw digital signal is sent, second loop is received to the data signal after raw digital signal processing；When signal characteristic difference is identical caused by each DBF, signal characteristic difference sum caused by being equal to the first loop to the data signal and the feature difference of raw digital signal after raw digital signal processing according to the first loop, and be equal to the signal characteristic difference sum caused by the second loop to the data signal and the feature difference of raw digital signal after raw digital signal processing from the second loop, determine signal characteristic difference caused by benchmark TRX with The difference of the signal characteristic difference caused by other TRX in addition to the benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.
Another aspect of the invention is provided：
Signal characteristic difference condition determines method caused by a kind of TRX, including：
Send raw digital signal；
First loop and second loop are received respectively to the data signal after raw digital signal processing；Wherein, the first loop is by processor, DBF, corresponding CP, main connecting line, the first calibrated channel, processor are linked in sequence and formed with the DBF --- corresponding TRX, with the TRX ---；Second loop is by processor, DBF, corresponding CP, main connecting line, the second calibrated channel, processor are linked in sequence and formed with the DBF --- corresponding TRX, with the TRX ---；
When signal characteristic difference is identical caused by each DBF, signal characteristic difference sum caused by being equal to the first loop to the data signal and the feature difference of raw digital signal after raw digital signal processing according to the first loop, and second loop to the raw digital signal processing after data signal and raw digital signal feature difference be equal to the second loop caused by signal characteristic difference sum, determine the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.
Another aspect of the invention is provided：
Signal characteristic difference determines method caused by a kind of TRX, including：
Control calibrated channel connects the first end of main connecting line, sends raw digital signal, receives the raw digital signal and passes through the data signal that first loop is returned；Wherein, the first loop is processor, DBF, corresponding CP, main connecting line, calibrated channel, processor are linked in sequence what is formed with the DBF --- corresponding TRX, with the TRX ---；
Control calibrated channel connects the second end of main connecting line, sends the raw digital signal, receives the raw digital signal and passes through the data signal that second loop is returned；Wherein, the second loop is processor, DBF, corresponding CP, main connecting line, calibrated channel, processor are linked in sequence what is formed with the DBF --- corresponding TRX, with the TRX ---；
When signal characteristic difference is identical caused by each DBF, data signal and original number after being handled according to the first loop equal to the signal characteristic difference sum and the second loop caused by the first loop the raw digital signal the data signal and the feature difference of raw digital signal after raw digital signal processing The feature difference of word signal is equal to the signal characteristic difference sum caused by the second loop, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX is determined, wherein benchmark TRX is any one TRX in N number of TRX.
One embodiment of the invention is by processor, DBF, corresponding CP, main connecting line, the first calibrated channel, processor, which are linked in sequence, forms the first loop with the DBF --- corresponding TRX, with the TRX ---；Processor, DBF, with the DBF --- corresponding TRX, with the TRX --- corresponding CP, main connecting line, second calibrated channel, processor is linked in sequence to form the second loop, signal characteristic difference sum of the processor according to caused by the feature difference for the data signal that oneself is received and dispatched on two loops is respectively equal to the two loops, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX that are assured that caused by benchmark TRX, so as to carry out accurate calibration to each TRX.
Another embodiment of the present invention is when calibrated channel connects the first end of main connecting line, and by processor, DBF, corresponding CP, calibrated channel, processor, which are linked in sequence, forms the first loop with the DBF --- corresponding TRX, with the TRX ---；When calibrated channel connects the second end of main connecting line, by processor, DBF, with the DBF --- corresponding TRX, with the TRX --- corresponding CP, calibrated channel, processor is linked in sequence to form the second loop, signal characteristic difference sum of the processor according to caused by the feature difference for the data signal that oneself is received and dispatched on two loops is respectively equal to the two loops, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX that are assured that caused by benchmark TRX, so as to carry out accurate calibration to each TRX.Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, cylinder will be made to the required accompanying drawing used in embodiment below singly to introduce, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the base station structure diagram for the use parallel calibration mode that prior art is provided；
Fig. 2 is the base station structure diagram for the serial calibrating mode of use that prior art is provided；
Fig. 3 is a kind of TRX calibrator (-ter) units structure provided in an embodiment of the present invention using serial calibrating mode Figure；
Fig. 4 is the specific transmission direction schematic diagram of signal in the direction of the launch provided in an embodiment of the present invention；Fig. 5 is the specific transmission direction schematic diagram of the upward signal of recipient provided in an embodiment of the present invention；Fig. 6 is another TRX calibrator (-ter) units structure chart provided in an embodiment of the present invention using serial calibrating mode；
Fig. 7 is another TRX calibrator (-ter) unit structure chart provided in an embodiment of the present invention using serial calibrating mode；
Fig. 8 is another TRX calibrator (-ter) unit structure chart provided in an embodiment of the present invention using serial calibrating mode；
Fig. 9 be a kind of TRX provided in an embodiment of the present invention caused by signal characteristic difference determine method flow diagram；
Figure 10 be another TRX provided in an embodiment of the present invention caused by signal characteristic difference determine method flow diagram.Embodiment
Refering to Fig. 3, the embodiment of the present invention provides a kind of TRX calibrator (-ter) units, and the TRX calibrator (-ter) units can be base station, and it includes：N number of DBF 20, N number of with DBF --- corresponding TRX 30, N number of with TRX --- corresponding CP 40, the first calibrated channel 50, the second calibrated channel 60, main connecting line 55 and processor 10 between the first calibrated channel 50 and the second calibrated channel 60;Wherein, N number of DBF includes the first DBF (i.e. DBF), the 2nd DBF (i.e. DBF2), the 3rd DBF (i.e. DBF3), the 4th DBF (i.e. DBF4) N DBF (i.e. DBFN);N number of TRX includes the first TRX (i.e.
TRX!), the 2nd TRX (i.e. TRX2), the 3rd TRX (i.e. TRX3), the 4th TRX (i.e. TRX4) N TRX (i.e. TRXN);N number of CP includes the first CP (i.e. CPi), the 2nd CP (i.e. CP2), CP (P CP3), the 4th CP (P CP4) N CP (P CPN )。
Wherein, N number of CP 40 one end connects the main connecting line 55, and other end connection is each self-corresponding
TRX 30;Processor 10, DBF 20, corresponding CP 40, main connecting line 55, the first calibrated channel 50, processor 10 are linked in sequence and to form the first loop with the DBF 20 --- corresponding TRX 30, with the TRX 30 ---；Processor 10, DBF 20, with the DBF 20 --- corresponding TRX 30, with the TRX 30 --- corresponding CP 40, main connecting line 55, the second calibrated channel 60, processor 10, which are linked in sequence, to form the second loop；Such as, as shown in Fig. 3, processor 10, DBFi, with the DBF!--- the corresponding TRXi and TRX!--- corresponding CPi, main connecting line 55, the first calibrated channel 50, processor 10 are linked in sequence to form the first loop；Processor 10, DBFi, --- corresponding TRX^ and the TRXi --- corresponding main connecting lines 55 of CP^, the second calibrated channel 60, processor 10 are linked in sequence and to form the second loop with the DBF.
The processor, for sending raw digital signal, receives first loop and second loop to the data signal after raw digital signal processing respectively；When signal characteristic difference is identical caused by each DBF, signal characteristic difference sum caused by being equal to the first loop to the data signal and the feature difference of raw digital signal after raw digital signal processing according to the first loop, and second loop to the raw digital signal processing after data signal and raw digital signal feature difference be equal to the second loop caused by signal characteristic difference sum, determine the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX, benchmark TRX can be TRX1Can also be TRXN, the realization of the present invention is not influenceed.Signal characteristic difference caused by benchmark TRX is：Changes in amplitude, phase place change and/or delay of the output signal of changes in amplitude, phase place change and/or the delay of signal caused by benchmark TRX, i.e. benchmark TRX input signal after benchmark TRX relative to the input signal.
The processor, the difference of signal characteristic difference that can also be according to caused by the signal characteristic difference caused by identified benchmark TRX with other TRX in addition to the benchmark TRX, control each DBF to compensate signal characteristic difference caused by each TRX, make the DBF on each loop identical with the signal characteristic difference caused by TRX.It is following to illustrate：As shown in figure 3, for processor 10, DBFi, with the DBFi, --- corresponding TRXi, with the TRXi --- corresponding CPi, main connecting line 55, the first calibrated channel 50, processor 10 is linked in sequence the first loop to be formed；And, processor 10, DBF2And the DBF2--- corresponding TRX2And the TRX2--- corresponding CP2, main connecting line 55, the first calibrated channel 50, processor 10 be linked in sequence the first loop to be formed；And processor 10, DBFNAnd the DBFN--- corresponding TRXNAnd the TRXN--- corresponding CPN, main connecting line 55, the first calibrated channel 50, processor 10 be linked in sequence the first loop to be formed, the signal characteristic difference caused by DBFi and TRX, DBF2With TRX2Caused signal characteristic difference, DBFNWith TRXNCaused signal characteristic difference three should be identical, to ensure the every road letter for encouraging multiple antennas Number amplitude, phase, delay feature meet specific distribution.The embodiment is described in detail exemplified by the signal characteristic difference caused by TRX is sought using the direction of the launch as follows：
Processor 10, for sending raw digital signal to N number of DBF.
N DBF 20, it is each self-corresponding for each raw digital signal from processor to be sent to
TRX.I.e. each raw digital signal passes through DBF^ DBF respectively2、 DBF3、 DBF4 DBFN, each TRXi, TRX are reached with same signal characteristic2、 TRX3、 TRX4 TRXN。
N number of TRX 30, for handling the raw digital signal from DBF, exports radiofrequency signal；That is TRX^ TRX2、 TRX3、 TRX4 TRXNThe raw digital signal to reception carries out DA conversions, modulation, upconversion process respectively, obtains radiofrequency signal, and export radiofrequency signal.
N number of CP 40, the radiofrequency signal for extracting N number of TRX outputs；
Main connecting line 55, for the radiofrequency signal of N number of TRX outputs to be transferred into first calibrated channel 50 and second calibrated channel 60 respectively;
First calibrated channel 50, for handling the N number of CP for carrying out autonomous connecting line 55 radiofrequency signals extracted, obtains N number of first kind data signal, N number of first kind data signal is sent into processor 10;Specifically, the radiofrequency signal that the first calibrated channel 50 is extracted to N number of CP carries out down-converted, demodulation, AD conversion, N number of first kind data signal is obtained.
Second calibrated channel 60, for handling the N number of CP for carrying out autonomous connecting line 55 radiofrequency signals extracted, obtains N number of Equations of The Second Kind data signal, N number of Equations of The Second Kind data signal is sent into processor 10.Specifically, the radiofrequency signal that the second calibrated channel 50 is extracted to N number of CP carries out down-converted, demodulation, AD conversion, N number of Equations of The Second Kind data signal is obtained.
Processor 10, is additionally operable to receive N number of first kind data signal and N number of Equations of The Second Kind data signal.For the first loop, processor sets up equation below group one：
SDBFi + STRXi + SCPn + SCALA = SAi
SDBF2 + STRX2 + SCP21 + SCALA = SA2
SDBFN + STRXN + SCPNI + SCALA = SA] Wherein, SDBF^ SDBF2..... SDBFNDBF^ DBF are represented respectively2 DBFNCaused signal characteristic difference, wherein, DBF^ DBF2...... DBFNCaused signal characteristic difference is：
DBF!, DBF2 DBFNChanges in amplitude, phase place change and/or the delay of caused signal, be specially：DBF (such as DBF^ DBF2 DBFN) output signal changes in amplitude, phase place change and/or delay relative to the input signal of the input signal after the DBF.In the embodiment of the present invention, each DBF resets during due to calibration, then the signal characteristic difference caused by each DBF is identical, it can be assumed that SDBFi, SDBF2..... SDBFNAll it is 0.
Wherein, STRXi, STRX2 STRXNTRX TRX are represented respectively2 TRXNCaused signal characteristic difference.Signal characteristic difference caused by τ ι is：The output signal changes in amplitude, phase place change and/or delay relative to the input signal of 1 input signal after τ ι. TRX2...... TRXNThe definition of caused signal characteristic difference is similar to its, will not be repeated here.
Wherein, SCPn、 SCP21、 SCPN1The signal characteristic difference caused by the main connecting line between each CP to CPi is represented respectively；Wherein, the signal characteristic difference caused by each CP to CP main connecting line is：Each CP reaches changes in amplitude, phase place change and/or the delay of the signal caused by the main connecting line between CPi.
Now, SCPn = 0; 8 ?21For CP2To the signal characteristic difference caused by the main connecting line between CPi；SCALA represents signal characteristic difference caused during the first calibration multi-channel operation, the signal characteristic difference is all identical for any first loop, the signal characteristic difference includes CPi to the main connecting line between the first calibrated channel, the signal characteristic difference sum caused by the first calibrated channel, that is the signal characteristic difference caused by CPi to the main connecting line between the first calibrated channel, with the signal characteristic difference sum caused by the first calibrated channel.Wherein, the signal characteristic difference caused by the main connecting line between the calibrated channels of CP ij first is：Changes in amplitude, phase place change and/or the delay of signal caused by CPi to the main connecting line between the first calibrated channel.Signal characteristic difference caused by first calibrated channel is：Output signal of the input signal of first calibrated channel after the first calibrated channel is relative to the changes in amplitude, phase place change and/or delay of the input signal, the i.e. changes in amplitude of signal caused by the first calibrated channel, phase place change and/or delay.
Wherein, SA1 SA2..... SANThe feature difference of each raw digital signal and the first loop to the data signal after raw digital signal processing is represented respectively；Such as, SAi represents the first loop where TRX to the data signal and the feature difference of raw digital signal after raw digital signal processing； SA2Represent TRX2First loop at place is poor to the data signal and the feature of raw digital signal after raw digital signal processing For the second loop, processor sets up equation below group two:
SDBFi + STRXi + SCP1N + SCALB = SBi
SDBF2 + STRX2 + SCP2N + SCALB = SB2
SDBFN + STRXN+ SCP Seoul+SCALB=SBN
Wherein, SDBF^ SDBF2..... SDBFNDefinition and STRX^ STRX2 STRXNDefinition as hereinbefore, will not be repeated here.
Wherein, SCP1N、 SCP2N, SCPNN represent each CP to CPr " respectively] main connecting line caused by signal characteristic difference；Wherein, the signal characteristic difference caused by each CP to CP^ main connecting line is：Each CP reaches CPNBetween main connecting line caused by signal changes in amplitude, phase place change and/or delay.Now, SCPNN=0; 8 ^ is the signal characteristic difference caused by the main connecting lines of CP^ CP 々； 8 For CP2To the signal characteristic difference caused by the main connecting lines of CP^^ 々；SCALB represents signal characteristic difference caused during the second calibration multi-channel operation, and the signal characteristic difference is all identical for any second loop, and the signal characteristic difference includes CPNTo the signal characteristic difference caused by the main connecting line between the main connecting line between the second calibrated channel, the signal characteristic difference sum caused by the second calibrated channel, the i.e. calibrated channels of CPr^ second, with the signal characteristic difference sum caused by the second calibrated channel.The signal characteristic difference caused by main connecting line between the calibrated channels of CP^^ second is： CPNTo changes in amplitude, phase place change and/or the delay of the signal caused by the main connecting line between the second calibrated channel.Signal characteristic difference caused by second calibrated channel is：Output signal of the input signal of second calibrated channel after the second calibrated channel is relative to the changes in amplitude, phase place change and/or delay of the input signal, the i.e. changes in amplitude of signal caused by the second calibrated channel, phase place change and/or delay.
Wherein, SB^ SB2..... SBNThe feature difference of each raw digital signal and the second loop to the data signal after raw digital signal processing is represented respectively；Such as, SB represents the second loop where TRXi to the data signal and the feature difference of raw digital signal after raw digital signal processing； SB2Represent TRX2Second loop at place is to the data signal and the feature difference of raw digital signal after raw digital signal processing.
Main connecting line 55 connects N number of CP one end respectively in the embodiment of the present invention, wherein, main connecting line 55 have passivity：The delay feature of the signal caused by a CP to another CP on the main connecting line 55 of signal is equal to the delay feature of the signal caused by the another CP to one CP.According to the passivity, processor is pre-configured with equation below group three：
SCPIN― SCPNI - SCPn
SCP?N― SCPNI - SCP?i
SCPNN = SCPNI SCPNI
Wherein,
And SCP31= SCP2i+ SCP32
Processor is obtained according to above-mentioned equation group one：
Processor is obtained according to above-mentioned equation group two：
STRX2-STRX!= SB2-SB ( SCP2N-SCP1N) (2)
Processor is obtained according to above-mentioned equation group three：
SCP2N-SCP1N= SCPn-SCP2i (3)
Processor according to above-mentioned formula (1),（2), (3), are obtained：
STRX2-STRX! = 0.5* ( SA2-SA!+ SB2-SB! ) (4)
According to similar calculation, processor is obtained：
( STRX3 - STRXi ) = 0.5 * ( SA3 + SB3 - SAi - SB , (5)
( STRXN - STRXi ) = 0.5 * ( SAN + SBN - SAi - SBi ) (6)
Because in TRX calibrator (-ter) unit runnings, TRX calibrations are the routine activities to carry out at any time.Because environment（Such as temperature, traffic load, power down etc.）Change, all can cause each TRX characteristic to change, therefore the signal characteristic difference caused by each TRX can also change, it is necessary to restart calibration, but CP values will not change with environment.Calibrate so processor can carry out a TRX after electrifying startup and try to achieve CP values, then save each CP values.So, later when the first calibrated channel is damaged, can according to equation group two, try to achieve benchmark TRX caused by signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX difference, wherein, benchmark TRX Can be TRX1At this point it is possible to try to achieve TRX according to equation group two2、 TRX3..... TRXNThe difference of caused signal characteristic difference and the signal characteristic difference caused by TRX.When the second calibrated channel is damaged, can according to equation group one, try to achieve benchmark TRX caused by signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX difference, wherein, benchmark TRX can be TRX1At this point it is possible to try to achieve TRX according to equation group one2、 TRX3..... TRXNThe difference of caused signal characteristic difference and the signal characteristic difference caused by TRXi.
Specifically, processor described below solves the process of CP values：
1) the signal characteristic difference caused by each CP to CP main connecting line, is sought
First equation of equation group one and second equation are subtracted each other, can be obtained：
By above-mentioned formula（4) formula is substituted into, and due to SCPU=0, therefore SCP can be obtained21Value；Similarly, first equation of equation group one is subtracted each other with the 3rd equation, can obtained：
By above-mentioned formula（5) formula is substituted into, and due to SCPU=0, therefore SCP can be obtained31Value；Similarly, first equation of equation group one is subtracted each other with last equation, can obtained：
By above-mentioned formula（6) formula is substituted into, and due to SCPu=0, therefore SCP can be obtainedN1Value.2) each CP to CP, is soughtNBetween main connecting line caused by signal characteristic difference
First equation of equation group two and second equation are subtracted each other, can be obtained：
Further according to the first two equation of equation group three, and SCP1N = SCPN1 , SCPu=0, SCP can be obtained2N。
Similarly, SCP can be obtained3N、 SCP4N . . ... SCPNN。
As shown in figure 3, TRX calibrator (-ter) units can also include the first multiplexing demultiplexing device 70 and the second multiplexing demultiplexing device 80 in the embodiment, it is with above-mentioned TRX calibrator (-ter) units difference：
Main connecting line 55, the radiofrequency signal for N number of TRX to be exported is transferred to the first multiplexer 70 and the second multiplexer 80 respectively;
First multiplexer 70, the radiofrequency signal specifically for N number of TRX outputs of autonomous connecting line in the future is sent out It is sent to the first calibrated channel 50;
Second multiplexer 80, the radiofrequency signal specifically for N number of TRX outputs of autonomous connecting line in the future is sent to the second calibrated channel 60;
First calibrated channel 50, for handling the radiofrequency signals extracted of N number of CP from the first multiplexer 70, obtains N number of first kind data signal, N number of first kind data signal is sent into processor 10;
Second calibrated channel 60, for handling the radiofrequency signals extracted of N number of CP from the second multiplexer 80, obtains N number of Equations of The Second Kind data signal, N number of Equations of The Second Kind data signal is sent into processor 10.
And SCALA is different with the particular content of SCALB represented signal characteristic difference：
The signal characteristic difference that SCALA is represented includes the signal characteristic difference sum caused by CPi to the main connecting line between the first calibrated channel, the first multiplexer, the first calibrated channel；The signal characteristic difference that SCALB is represented includes CPNTo the signal characteristic difference sum caused by the main connecting line between the second calibrated channel, the second multiplexer, the second calibrated channel.
Wherein, in order that CP 40, TRX 30, annexation between main connecting line, the first calibrated channel, the second calibrated channel becomes apparent from, Fig. 4 shows the annexation between CP 40, TRX 30, main connecting line, the first calibrated channel, the second calibrated channel, and when the signal characteristic difference caused by TRX is sought in the embodiment signal specific transmission direction.Wherein, CP 40 includes 4 ends, that is first end 41, the second end 42, the 3rd end 43 and the 4th end 44, wherein, the first termination TRX, second end 42 connects main connecting line, what equipment 3rd termination aerial array, the 4th end does not take over, optionally, the CP 40 can also only include 3 ends, i.e. first end 41, the second end 42, the 3rd end 43.
The embodiment of the present invention is by processor, DBF and DBF --- corresponding TRX and TRX ---, and corresponding CP, main connecting line, the first calibrated channel, processor are linked in sequence forms the first loop；Processor, DBF, with DBF --- corresponding TRX and TRX --- corresponding CP, main connecting line, the second calibrated channel, processor are linked in sequence to form the second loop；Signal characteristic difference sum of the processor according to caused by the difference for the data signal received and dispatched in the direction of the launch on two loops is respectively equal to the two loops, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX that are assured that caused by benchmark TRX, so as to each TRX Carry out accurate calibration.The embodiment is described in detail exemplified by the signal characteristic difference caused by TRX is sought using the direction of the launch as follows：
Processor 10, for sending raw digital signal to the first calibrated channel 50 and the second calibrated channel 60；Specifically, can be the first moment to the first calibrated channel 50 send raw digital signal, raw digital signal, i.e. timesharing are sent to the first calibrated channel 50 and the second calibrated channel 60 transmission raw digital signal to the second calibrated channel 60 at the second moment；
First calibrated channel 50, for the raw digital signal from processor to be handled, obtains first kind radiofrequency signal and is output to the main connecting line 55;Specifically, the raw digital signal from processor is carried out into DA conversions, modulation, upconversion process, first kind radiofrequency signal is obtained, first kind radiofrequency signal is output to the main connecting line 55;
Second calibrated channel 60, for the raw digital signal from processor to be handled, obtains Equations of The Second Kind radiofrequency signal and is output to the main connecting line 55;Specifically, the raw digital signal from processor is carried out into DA conversions, modulation, upconversion process, Equations of The Second Kind radiofrequency signal is obtained, Equations of The Second Kind radiofrequency signal is output to the main connecting line 55;
Main connecting line 55, for giving N number of CP by the first kind radiofrequency signal from the first calibrated channel and the Equations of The Second Kind radio signal transmission from the second calibrated channel;
N number of CP 40, first kind radiofrequency signal and Equations of The Second Kind radiofrequency signal for autonomous connecting line in the future are sent respectively to N number of TRX, i.e. CP^ CP2、 CP3、 CPNThe first kind radiofrequency signal and Equations of The Second Kind radiofrequency signal of autonomous connecting line are sent respectively to TRX^ TRX in the future2、 TRX3、 TRXN。
N number of TRX 30, for handling the first kind radiofrequency signal from N number of CP, output first kind data signal to N number of DBF;Equations of The Second Kind radiofrequency signal from N number of CP is handled, output Equations of The Second Kind data signal to N number of DBF;Specifically, each TRX carries out down-converted, demodulation, AD conversion to first kind radiofrequency signal, first kind data signal is obtained；Down-converted, demodulation, AD conversion are carried out to Equations of The Second Kind radiofrequency signal, Equations of The Second Kind data signal is obtained； TRXi, TRX2、 TRX3、 TRX4、 TRXNFirst kind data signal and Equations of The Second Kind data signal are sent to DBF^ DBF respectively2、 DBF DBFN; N number of DBF 20, for N number of first kind data signal from N number of TRX to be sent into the processor, the processor is sent to by N number of Equations of The Second Kind data signal from N number of TRX.
Processor 10, for receiving N number of first kind data signal and N number of Equations of The Second Kind data signal, subsequent processor 10 sets up equation group one, equation group two, and solve the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX in addition to the benchmark TRX, and the signal characteristic difference caused by the main connecting line between each CP to CP of solution, and ask the mode of signal characteristic difference caused by each CP to cpy main connecting line identical with the process solved in the TRX calibration embodiments of the above-mentioned direction of the launch, it will not be repeated here.
It should be noted that：Processor timesharing sends raw digital signal to the first calibrated channel 50 and the second calibrated channel 60, also will timesharing receive first kind data signal and Equations of The Second Kind data signal, so, processor can just distinguish reception data signal which be data signal after the first loop processed, which is the data signal after the second loop processed, the first data signal and the second data signal can just be distinguished, so as to by the first data signal and raw digital signal, second data signal and raw digital signal are contrasted, obtain the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX.
Wherein, in order that CP 40, TRX 30, annexation between main connecting line, the first calibrated channel, the second calibrated channel becomes apparent from, Fig. 5 shows the annexation between CP 40, TRX 30, main connecting line, the first calibrated channel, the second calibrated channel, and when the signal characteristic difference caused by TRX is sought in the embodiment signal specific transmission direction, CP 40 structure is identical with Fig. 4, will not be repeated here.
Optionally, the first demultiplexer 70 and the second demultiplexer 80 can also be included, be with above-mentioned TRX calibrator (-ter) units difference：
First calibrated channel 50, for the raw digital signal from processor to be handled, obtains first kind radiofrequency signal and is output to the first demultiplexer 70;Specifically, the raw digital signal from processor is carried out into DA conversions, modulation, upconversion process, first kind radiofrequency signal is obtained, first kind radiofrequency signal is output to the first demultiplexer 70;
Second calibrated channel 60, for the raw digital signal from processor to be handled, obtains Equations of The Second Kind radiofrequency signal and is output to the second demultiplexer 80;Specifically, the raw digital signal from processor is carried out into DA conversions, modulation, upconversion process, Equations of The Second Kind radiofrequency signal is obtained, Equations of The Second Kind radio frequency is believed Number it is output to the second demultiplexer 80;
First demultiplexer 70, specifically for first kind radiofrequency signal is exported to main connecting line；Second demultiplexer 80, specifically for Equations of The Second Kind radiofrequency signal is sent into output to main connecting line；Main connecting line 55, for giving N number of CP by the first kind radiofrequency signal from the first demultiplexer 70 and the Equations of The Second Kind radio signal transmission from the second demultiplexer 80.
And SCALA is different with the particular content of SCALB represented signal characteristic difference：The signal characteristic difference that SCALA is represented includes the signal characteristic difference sum caused by CPi to the main connecting line between the first calibrated channel, the first demultiplexer, the first calibrated channel；The signal characteristic difference that SCALB is represented includes CPNTo the signal characteristic difference sum caused by the main connecting line between the second calibrated channel, the second demultiplexer, the second calibrated channel.
In another embodiment：
Processor 10, for sending the first raw digital signal to the first calibrated channel 50, the second raw digital signal is sent to the second calibrated channel 50, the first raw digital signal and the second raw digital signal are the data signals of different coding；Specifically, processor 10 can send the second raw digital signal to the second calibrated channel 50, can also not send in the same time, the realization of the present invention is not influenceed in synchronization to the first calibrated channel 50 the first raw digital signal of transmission.
First calibrated channel 50, for the first raw digital signal from processor 10 to be handled, obtains first kind radiofrequency signal and is output to the main connecting line 55;
Second calibrated channel 60, for the second raw digital signal from processor to be handled, obtains Equations of The Second Kind radiofrequency signal and is output to the main connecting line 55;
Follow-up main connecting line 55, N number of CP 40, N number of TRX 30, N number of DBF 20, processor 10 function it is identical with foregoing description, will not be repeated here.
So, because the first raw digital signal and the second raw digital signal are the data signals of different coding, then first kind radiofrequency signal and Equations of The Second Kind radiofrequency signal are also the signal of different coding, so, processor 10 can just distinguish the first data signal and the second data signal, so as to which the first data signal is contrasted with the first raw digital signal, by the second data signal with the second raw digital signal, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX is obtained. The embodiment of the present invention is by processor, DBF and DBF --- corresponding TRX and TRX ---, and corresponding CP, main connecting line, the first calibrated channel, processor are linked in sequence forms the first loop；Processor, DBF, with DBF --- corresponding TRX and TRX --- corresponding CP, main connecting line, the second calibrated channel, processor are linked in sequence to form the second loop；Signal characteristic difference sum of the processor according to caused by the difference for the data signal received and dispatched on upward two loops of recipient is respectively equal to the two loops, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX that are assured that caused by benchmark TRX, so as to carry out accurate calibration to each TRX.Refering to Fig. 6, the embodiment of the present invention provides another TRX calibrator (-ter) units, and the main distinction of itself and embodiment illustrated in fig. 3 is that the TRX calibrator (-ter) units also include：Serioparallel exchange module/combining module 90, indoor baseband processing module 40.Interface between serioparallel exchange module/combining module 90 and indoor baseband processing module 40 is CPRI.Wherein, the signal to be sent from BBU is carried out serioparallel exchange by serioparallel exchange module, obtains N roads I/Q signal, N roads I/Q signal is separately input in N number of DBF modules；N number of DBF modules are sent to each self-corresponding TRX after carrying out feature compensation to N roads I/Q signal;N number of TRX carries out DA conversions, modulation, upconversion process to the signal of reception respectively, obtains radiofrequency signal, and export radiofrequency signal to antenna.N number of TRX receives the radiofrequency signal from antenna, and the radiofrequency signal from antenna is carried out into down-converted, demodulation, AD conversion, data signal is obtained, data signal is sent into respective DBF;N number of DBF modules carry out being sent to combining module 90 after feature compensation to N railway digitals signal;Combining module 90 is sent to indoor baseband processing module 40 after the data signal from N number of DBF is combined.
In a kind of embodiment, serioparallel exchange module/combining module 90 and processor 10 can with it is integrated on one module.
The embodiment of the present invention is after processor controls DBF modules to feature difference is compensated caused by TRX, it ensure that the amplitude, phase, delay feature of every road signal of excitation multiple antennas have to comply with specific distribution, i.e., form satisfactory radiation lobe figure in the air.Refering to Fig. 7, the embodiment of the present invention provides another TRX calibrator (-ter) units, the master with above-described embodiment Distinguish and be, a calibrated channel is only needed in the TRX calibrator (-ter) units, the TRX calibrator (-ter) units include：N number of DBF 200, N number of with DBF --- corresponding TRX 300, N number of with TRX --- corresponding CP 400, calibrated channel 500, the main connecting line 550 with the end 552 of first end 551 and second, processor 100, wherein, Ν CP one end connects the main connecting line, the other end connects each self-corresponding TRX, calibrated channel 500 under the control of a processor, connects the end 552 of first end 551 or second of main connecting line 550;Wherein, N number of DBF includes the first DBF (i.e. DBFi), the 2nd DBF (i.e. DBF2),
DBF ( p DBF3), the 4th DBF (^ DBF4) N DBF (^ DBFN ); N ^
TRX includes the first TRX (i.e. TRXi), the 2nd TRX (i.e. TRX2), the 3rd TRX (i.e. TRX3), the 4th TRX (i.e. TRX4) N TRX (i.e. TRXN);N number of CP includes the first CP (i.e. CP!), the 2nd CP (P CP2), the 3rd CP (P CP3), the 4th CP (P CP4) N CP
(i.e. CPN )。
Wherein, when calibrated channel connects the first end 551 of main connecting line 550, corresponding CP, main connecting line, calibrated channel, processor are linked in sequence to form the first loop by processor, DBF and DBF --- corresponding TRX and TRX ---；When calibrated channel connects the second end 552 of main connecting line 550, corresponding CP, main connecting line, calibrated channel, processor are linked in sequence to form the second loop by processor, DBF and DBF --- corresponding TRX and TRX ---；Such as, as shown in Figure 7, when calibrated channel connects the first end 551 of main connecting line 550, processor 100, DBFi, --- corresponding TRX^ and TRX --- corresponding main connecting lines 550 of CP^, calibrated channel 500, processor 100 are linked in sequence to form the first loop with DBF1；When calibrated channel connects the second end 552 of main connecting line 550, processor KXh DBF and the corresponding main connecting lines 550 of CP^ of DBFi --- corresponding TRX^ and TRXi ---, calibrated channel 500, processor 100 are linked in sequence to form the second loop.
Specifically, as shown in Figure 7, the TRX calibrator (-ter) units can also include switch 700, state of the processor 100 specifically for controlling switch 700, so that the first end 551 of the calibrated channel 500 and main connecting line 550 is connected, or, the second end 552 of the calibrated channel 500 and main connecting line 550 is connected.
In the embodiment, the function of processor and the function phase of processor in above-mentioned embodiment illustrated in fig. 3 are same, will not be repeated here, specifically describe as follows in the signal characteristic difference asked caused by TRX in a transmit direction and during recipient's upward signal characteristic difference asked caused by TRX other elements function： During the signal characteristic difference asked caused by TRX in a transmit direction, N number of DBF, for each raw digital signal from processor to be sent into each self-corresponding TRX;N number of TRX, for handling the raw digital signal from DBF, exports radiofrequency signal；N number of CP, the radiofrequency signal for extracting N number of TRX outputs；Main connecting line, the radio signal transmission extracted N number of CP for the first end by main connecting line or the second end is to calibrated channel；When calibrated channel, first end for connecing main connecting line, N number of CP radiofrequency signals extracted are handled, N number of first kind data signal is obtained, N first kind data signal is sent to processor；When connecing the second end of main connecting line, N number of CP radiofrequency signals extracted are handled, N number of Equations of The Second Kind data signal is obtained, N number of Equations of The Second Kind data signal is sent to processor；Wherein, N number of first kind data signal is：First loop is to the data signal after raw digital signal processing；N number of Equations of The Second Kind data signal is：Second loop is to the data signal after raw digital signal processing.
During the signal characteristic difference asked caused by TRX in a receive direction, N number of DBF, for each raw digital signal from processor to be sent into each self-corresponding TRX;N number of TRX, for handling the raw digital signal from DBF, exports radiofrequency signal；N number of CP, the radiofrequency signal for extracting N number of TRX outputs；Main connecting line, the radio signal transmission extracted N number of CP for the first end by main connecting line or the second end is to calibrated channel；When calibrated channel, first end for connecing main connecting line, N number of CP radiofrequency signals extracted are handled, N number of first kind data signal is obtained, N first kind data signal is sent to processor；When connecing the second end of main connecting line, N number of CP radiofrequency signals extracted are handled, N number of Equations of The Second Kind data signal is obtained, N number of Equations of The Second Kind data signal is sent to processor；Wherein, N number of first kind data signal is：First loop is to the data signal after raw digital signal processing；N number of Equations of The Second Kind data signal is：Second loop is to the data signal after raw digital signal processing.
Specifically, as shown in Figure 7, the TRX calibrator (-ter) units can be with multiplexing demultiplexing device 600, and the function of multiplexing demultiplexing device 600 is similar to the first multiplexing demultiplexing device in above-described embodiment, the function of the second multiplexing demultiplexing device, will not be repeated here.
The embodiment of the present invention is when the first end of calibrated channel connects main connecting line, and by processor, DBF, corresponding CP, main connecting line, calibrated channel, processor, which are linked in sequence, forms the first loop with the DBF --- corresponding TRX, with the TRX ---；When calibrated channel connects the second end of main connecting line, by processor, DBF, corresponding CP, calibrated channel, processor, which are linked in sequence, to form the second loop with the DBF --- corresponding TRX, with the TRX ---；Signal characteristic difference sum of the processor according to caused by the feature difference for the data signal that oneself is received and dispatched on two loops is respectively equal to the two loops, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX that are assured that caused by benchmark TRX, so as to carry out accurate calibration to each TRX.Refering to Fig. 8, the embodiment of the present invention provides another TRX calibrator (-ter) unit, and the main distinction of itself and embodiment illustrated in fig. 7 is that the TRX calibrator (-ter) units also include：Serioparallel exchange module/combining module 900, indoor baseband processing module 400.Interface between serioparallel exchange module/combining module 900 and indoor baseband processing module 400 is CPRI.Wherein, the signal to be sent from BBU is carried out serioparallel exchange by serioparallel exchange module, obtains N roads I/Q signal, N roads I/Q signal is separately input in N number of DBF modules；N number of DBF modules carry out hair after feature compensation to N roads I/Q signal and send each self-corresponding TRX of Give;N number of TRX carries out DA conversions, modulation, upconversion process to the signal of reception respectively, obtains radiofrequency signal, and export radiofrequency signal to antenna.N TRX receives the radiofrequency signal from antenna, and the radiofrequency signal from antenna is carried out into down-converted, demodulation, AD conversion, data signal is obtained, data signal is sent into respective DBF;N number of DBF modules carry out being sent to combining module after feature compensation to N railway digitals signal；Hair send baseband processing module 400 in Give rooms after data signal from N number of DBF is combined by combining module.
In a kind of embodiment, serioparallel exchange module/combining module 900 and processor 100 can with it is integrated on one module.
The embodiment of the present invention is after processor controls DBF modules to feature difference is compensated caused by TRX, it ensure that the amplitude, phase, delay feature of every road signal of excitation multiple antennas have to comply with specific distribution, i.e., form satisfactory radiation lobe figure in the air.Refering to Fig. 9, signal characteristic difference condition caused by a kind of TRX of offer of the embodiment of the present invention determines method, and the TRX calibrator (-ter) units that this method is provided using Fig. 3, embodiment illustrated in fig. 4, this method is specifically included：
901st, processor sends raw digital signal. Specifically, the executive agent of each step can be processor in the embodiment.
902nd, first loop and second loop are received respectively to the data signal after raw digital signal processing.
Wherein, the first loop is by processor, DBF, corresponding CP, main connecting line, the first calibrated channel, processor are linked in sequence and formed with the DBF --- corresponding TRX, with the TRX ---；Second loop by processor, DBF, with the DBF --- corresponding TRX, CP corresponding with TRX-mono-, main connecting line, the second calibrated channel, processor are linked in sequence and formed；
Specifically, it can be specifically that processor sends raw digital signal to each DBF that raw digital signal is sent in step 901, can also be that processor sends raw digital signal to the first calibrated channel and the second calibrated channel, the first loop received in step 902 is the first kind data signal in above-described embodiment to the data signal after raw digital signal processing, the second loop received in step 902 is the Equations of The Second Kind data signal in above-described embodiment to the data signal after raw digital signal processing, specific raw digital signal in the first loop and the second loop processing procedure referring to the corresponding description in said apparatus embodiment, it will not be repeated here.
903, when signal characteristic difference is identical caused by each DBF, signal characteristic difference sum caused by being equal to the first loop to the data signal and the feature difference of raw digital signal after raw digital signal processing according to the first loop, and second loop to the raw digital signal processing after data signal and raw digital signal feature difference be equal to the second loop caused by signal characteristic difference sum, determine the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.
Specifically, determining that the signal characteristic difference caused by benchmark TRX is similar to the description of said apparatus embodiment to the poor process of the signal characteristic difference caused by other TRX in addition to the benchmark TRX, than repeating no more.
Optionally, because in TRX calibrator (-ter) unit runnings, TRX calibrations are the routine activities to carry out at any time.Because environmental change can cause each TRX characteristic to change, therefore the signal characteristic difference caused by each TRX can also change, it is necessary to restart calibration, but CP values will not change with environment.Calibrate so processor can carry out a TRX after electrifying startup and try to achieve CP values, then save each CP values.So, can be according to another calibration later when a calibrated channel is damaged The corresponding equation group of passage（When such as the first calibrated channel is damaged, equation group two is utilized；When second calibrated channel is damaged, equation group one is utilized）With the CP values of preservation, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX is determined.Therefore CP values can be sought in the following way：The raw digital signal is equal to by the signal characteristic difference sum caused by the first loop according to the feature difference of the difference, and first kind data signal and raw digital signal, the signal characteristic difference caused by the main connecting lines of each CP to CP ^ 々 is determined；According to the difference, and the feature difference of Equations of The Second Kind data signal and raw digital signal is equal to the raw digital signal by the signal characteristic difference sum caused by the second loop, determines the signal characteristic difference caused by each CP to CP^ main connecting line.Wherein, specifically determine the process of the signal characteristic difference caused by the main connecting line between each CP to CPi, specifically determine that the process of signal characteristic difference caused by the main connecting lines of each CP to CPr ^ 々 is identical with the accordingly description of said apparatus embodiment, will not be repeated here.Different signal characteristic difference sum respectively equal to caused by the two loops, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX that are assured that caused by benchmark TRX, so as to carry out accurate calibration to each TRX.
Refering to Figure 10, signal characteristic difference condition caused by another TRX of offer of the embodiment of the present invention determines method, the TRX calibrator (-ter) units that this method is provided using Fig. 7, embodiment illustrated in fig. 8, this method is with above method difference, first end or the second end for controlling calibrated channel to connect main connecting line are needed, this method is specifically included：
1001st, control calibrated channel connects the first end of main connecting line, sends raw digital signal, receives the raw digital signal and passes through the data signal that first loop is returned；Wherein, the first loop is calibrated channel when connecing the first end of main connecting line, and processor, DBF, corresponding CP, main connecting line, calibrated channel, processor are linked in sequence what is formed with the DBF --- corresponding TRX, with the TRX ---.
Specifically, the executive agent of each step can be processor in the embodiment.
1002nd, control calibrated channel connects the second end of main connecting line, sends the raw digital signal, receives the raw digital signal and passes through the data signal that second loop is returned；Wherein, the second loop is calibrated channel when connecing the second end of main connecting line, processor, DBF, with the DBF --- corresponding TRX, With the TRX --- corresponding CP, main connecting line, calibrated channel, processor are linked in sequence what is formed.Specifically, it can be specifically that processor sends raw digital signal to each DBF that raw digital signal is sent in step 1001 and step 1002, can also be that processor sends raw digital signal to the first calibrated channel and the second calibrated channel, the first loop received in step 1001 is the first kind data signal in above-described embodiment to the data signal after raw digital signal processing, the second loop received in step 1002 is the Equations of The Second Kind data signal in above-described embodiment to the data signal after raw digital signal processing, specific raw digital signal in the first loop and the second loop processing procedure referring to the corresponding description in said apparatus embodiment, it will not be repeated here.
1003rd, when signal characteristic difference is identical caused by each DBF, signal characteristic difference sum and the second loop caused by being equal to the first loop to the data signal and the feature difference of raw digital signal after raw digital signal processing according to the first loop, equal to the signal characteristic difference sum caused by the second loop, determine benchmark to the data signal and the feature difference of raw digital signal after raw digital signal processing
The difference of signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by TRX, wherein benchmark TRX is any one TRX in N number of TRX.
Specifically, determining that the signal characteristic difference caused by benchmark TRX is similar to the description of said apparatus embodiment to the poor process of the signal characteristic difference caused by other TRX in addition to the benchmark TRX, than repeating no more.
Optionally, this method also includes：Determine that each CP reaches the process of the signal characteristic difference caused by CPi main connecting line, and determine that each CP reaches CPNMain connecting line caused by signal characteristic difference the mistake embodiment of the present invention in processor control calibrated channel meet CPi or CPr^ into two loops, signal characteristic difference sum according to caused by the feature difference for the data signal that oneself is received and dispatched on two loops is respectively equal to the two loops, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX that are assured that caused by benchmark TRX, so as to carry out accurate calibration to each TRX.
One of ordinary skill in the art will appreciate that realizing that all or part of step in above-described embodiment method can be by program to instruct the hardware of correlation to complete, described program can be stored in a kind of computer-readable recording medium, such as read-only storage, disk or CD etc.. The method of signal characteristic difference condition is described in detail, and specific case used herein is set forth to the principle and embodiment of the present invention, and the explanation of above example is only intended to help to understand method and its core concept of the invention；Simultaneously for those of ordinary skill in the art, according to the thought of the present invention, it will change in specific embodiments and applications, in summary, this specification content should not be construed as limiting the invention.

Claims (12)

  1. Claim
    1st, a kind of transceiver T RX calibrator (-ter) units, it includes：N number of digital beam forming module DBF, N number of with DBF --- corresponding TRX, N number of with TRX --- corresponding coupler CP, N are more than or equal to 2, it is characterised in that：Also include the first calibrated channel and the second calibrated channel, main connecting line between the first calibrated channel and the second calibrated channel, N number of CP one end connects the main connecting line, and the other end connects each self-corresponding TRX, and the TRX calibrator (-ter) units also include processor；
    Wherein, processor, DBF, corresponding CP, main connecting line, the first calibrated channel, processor, which are linked in sequence, to form the first loop with the DBF --- corresponding TRX, with the TRX ---；Processor, DBF, corresponding CP, main connecting line, the second calibrated channel, processor, which are linked in sequence, to form the second loop with the DBF --- corresponding TRX, with the TRX ---；
    The processor, for sending raw digital signal, receives first loop and second loop to the data signal after raw digital signal processing respectively；When signal characteristic difference is identical caused by each DBF, signal characteristic difference sum caused by being equal to the first loop to the data signal and the feature difference of raw digital signal after raw digital signal processing according to the first loop, and second loop to the raw digital signal processing after data signal and raw digital signal feature difference be equal to the second loop caused by signal characteristic difference sum, determine the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.
    2nd, TRX calibrator (-ter) units according to claim 1, it is characterised in that：
    N number of DBF, it is each self-corresponding for each raw digital signal from processor to be sent to
    TRX;
    N number of TRX, for handling the raw digital signal from DBF, exports radiofrequency signal；
    N number of CP, the radiofrequency signal for extracting N number of TRX outputs；
    The main connecting line, for the radiofrequency signal of N number of TRX outputs to be transferred into first calibrated channel and second calibrated channel respectively；
    First calibrated channel, for handling the radiofrequency signal for carrying out autonomous connecting line, obtains N first kind data signal, N number of first kind data signal is sent into processor； Second calibrated channel, for handling the radiofrequency signal for carrying out autonomous connecting line, obtains N Equations of The Second Kind data signal, N number of Equations of The Second Kind data signal is sent into processor；
    Wherein, N number of first kind data signal is：First loop is to the data signal after raw digital signal processing；N number of Equations of The Second Kind data signal is：Second loop is to the data signal after raw digital signal processing.
    3rd, TRX calibrator (-ter) units according to claim 1, it is characterised in that：
    First calibrated channel, for the raw digital signal from processor to be handled, obtains first kind radiofrequency signal and is output to the main connecting line；
    Second calibrated channel, for the raw digital signal from processor to be handled, obtains Equations of The Second Kind radiofrequency signal and is output to the main connecting line；
    The main connecting line, for giving N number of CP by the first kind radiofrequency signal from the first calibrated channel and the Equations of The Second Kind radio signal transmission from the second calibrated channel;
    N number of CP, first kind radiofrequency signal and Equations of The Second Kind radiofrequency signal for autonomous connecting line in the future are sent respectively to N number of TRX;
    N number of TRX, for handling the first kind radiofrequency signal from N number of CP, output first kind data signal to N number of DBF;Equations of The Second Kind radiofrequency signal from N number of CP is handled, output Equations of The Second Kind data signal to N number of DBF;
    N number of DBF, for N number of first kind data signal from N number of TRX to be sent into the processor, the processor is sent to by N number of Equations of The Second Kind data signal from N number of TRX；Wherein, N number of first kind data signal is：First loop is to the data signal after raw digital signal processing；N number of Equations of The Second Kind data signal is：Second loop is to the data signal after raw digital signal processing.
    4th, the TRX calibrator (-ter) units according to any one of claims 1 to 3, it is characterised in that N number of CP includes the first CP and the 2nd CP;N number of TRX includes the first TRX and the 2nd TRX;
    The processor, for setting up equation below group one and equation group two, the Simultaneous Equations being made up of group of equations one and equation group two determine the difference of the signal characteristic difference and the signal characteristic difference caused by the 2nd TRX caused by the first TRX； The equation group one includes：
    STRXi+SCPn+SCALA^SAi；
    STRX2+SCP21+SCALA=SA2;
    Wherein, 81Represent the first loop where the first TRX to the data signal and the feature difference of raw digital signal after raw digital signal processing； SA2Represent the first loop where the 2nd TRX to the data signal and the feature difference of raw digital signal after raw digital signal processing； SCPU = 0; SCP21For the signal characteristic difference caused by the main connecting line between the 2nd CP to the first CP；SCALA includes the first CP to the main connecting line between the first calibrated channel, the signal characteristic difference sum caused by the first calibrated channel；
    The equation group two includes：
    STRX2+SCP2N+SCALB=SB2;
    Wherein, 861Represent the second loop where the first TRX to the data signal and the feature difference of raw digital signal after raw digital signal processing； SB2Represent TRX2Second loop at place is to the data signal and the feature difference of raw digital signal after raw digital signal processing； SCP1NFor the first CP to the signal characteristic difference caused by N CP main connecting line； SCP2NFor the signal characteristic difference caused by the main connecting line between the 2nd CP to N CP；SCALB includes N CP to the main connecting line between the second calibrated channel, the signal characteristic difference sum caused by the second calibrated channel；
    Wherein, STRX^ STRX2The signal characteristic difference caused by the first TRX, the 2nd TRX is represented respectively.
    5th, TRX calibrator (-ter) units according to claim 4, it is characterised in that
    The processor, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX that are additionally operable to according to caused by the benchmark TRX, and first loop to the raw digital signal processing after data signal and raw digital signal feature difference be equal to the first loop caused by signal characteristic difference sum, determine the signal characteristic difference caused by the main connecting line between each CP to the first CP；And/or, the difference of signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX according to caused by the benchmark TRX, and the second loop are equal to caused by the second loop to the data signal and the feature difference of raw digital signal after raw digital signal processing Signal characteristic difference sum, determine the signal characteristic difference caused by the main connecting line between each CP to N CP.
    6th, a kind of TRX calibrator (-ter) units, it includes：N number of digital beam forming module DBF, N number of with DBF --- corresponding TRX, N number of with TRX --- corresponding coupler CP, N are more than or equal to 2, it is characterised in that：Also include calibrated channel, the main connecting line with first end and the second end, N number of CP one end connects the main connecting line, and the other end connects each self-corresponding TRX;
    Wherein, calibrated channel under the control of a processor, connects the first end of main connecting line or second end；When calibrated channel connects the first end, processor, DBF, corresponding CP, calibrated channel, processor, which are linked in sequence, to form the first loop with the DBF --- corresponding TRX, with the TRX ---；When calibrated channel connects second end, processor, DBF, corresponding CP, calibrated channel, processor, which are linked in sequence, to form the second loop with the DBF --- corresponding TRX, with the TRX ---；
    The processor, for controlling calibrated channel to connect the first end or second end, when calibrated channel connects the first end, sends raw digital signal, receives first loop to the data signal after raw digital signal processing；When calibrated channel connects second end, raw digital signal is sent, second loop is received to the data signal after raw digital signal processing；When signal characteristic difference is identical caused by each DBF, signal characteristic difference sum caused by being equal to the first loop to the data signal and the feature difference of raw digital signal after raw digital signal processing according to the first loop, and second loop to the raw digital signal processing after data signal and raw digital signal feature difference be equal to the second loop caused by signal characteristic difference sum, determine the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.
    7th, TRX calibrator (-ter) units according to claim 6, it is characterised in that：
    The TRX calibrator (-ter) units also include switch,
    State of the processor specifically for controlling switch so that the calibrated channel connects first end or the second end of the main connecting line.
    8th, TRX calibrator (-ter) units according to claim 6, it is characterised in that：
    N number of DBF, for each raw digital signal from processor to be sent into each self-corresponding TRX; N number of TRX, for handling the raw digital signal from DBF, exports radiofrequency signal；N number of CP, the radiofrequency signal for extracting N number of TRX outputs；
    Main connecting line, the radio signal transmission extracted N number of CP for the first end by main connecting line or the second end is to calibrated channel；
    When calibrated channel, first end for connecing main connecting line, N number of CP radiofrequency signals extracted are handled, N number of first kind data signal is obtained, N number of first kind data signal is sent to processor；When connecing the second end of main connecting line, N number of CP radiofrequency signals extracted are handled, N number of Equations of The Second Kind data signal is obtained, N number of Equations of The Second Kind data signal is sent to processor；
    Wherein, N number of first kind data signal is：First loop is to the data signal after raw digital signal processing；N number of Equations of The Second Kind data signal is：Second loop is to the data signal after raw digital signal processing.
    9th, TRX calibrator (-ter) units according to claim 6, it is characterised in that：
    When calibrated channel, first end for connecing main connecting line, the raw digital signal from processor is handled, first kind radiofrequency signal is obtained and is simultaneously output to main connecting line；When connecing the second end of main connecting line, the raw digital signal from processor is handled, Equations of The Second Kind radiofrequency signal is obtained and is output to main connecting line；
    When the main connecting line, first end for connecing main connecting line in calibrated channel, future, the first kind radio signal transmission of self calibration passage gave N number of CP;When calibrated channel connects the second end of main connecting line, future, the Equations of The Second Kind radio signal transmission of self calibration passage gave N number of CP;
    N number of CP, first kind radiofrequency signal and Equations of The Second Kind radiofrequency signal for autonomous connecting line in the future are sent respectively to N number of TRX;
    N number of TRX, for handling the first kind radiofrequency signal from N number of CP, exports first kind data signal；Equations of The Second Kind radiofrequency signal from N number of CP is handled, Equations of The Second Kind data signal is exported；
    N number of DBF, for N number of first kind data signal from N number of TRX to be sent into the processor, the processor is sent to by N number of Equations of The Second Kind data signal from N number of TRX；
    Wherein, N number of first kind data signal is：First loop is to the data signal after raw digital signal processing；N number of Equations of The Second Kind data signal is：Second loop is handled the raw digital signal Data signal afterwards.
    10th, the TRX calibrator (-ter) units according to any one of claim 6 to 9, it is characterised in that N number of CP includes the first CP and the 2nd CP;N number of TRX includes the first TRX and the 2nd TRX;
    The processor, for setting up equation below group one and equation group two, the Simultaneous Equations being made up of group of equations one and equation group two determine the difference of the signal characteristic difference and the signal characteristic difference caused by the 2nd TRX caused by the first TRX；
    The equation group one includes：
    STRXi+SCPn+SCALA^SAi；
    STRX2+SCP21+SCALA=SA2;
    Wherein, 81Represent the first loop where the first TRX to the data signal and the feature difference of raw digital signal after raw digital signal processing； SA2Represent the first loop where the 2nd TRX to the data signal and the feature difference of raw digital signal after raw digital signal processing； SCPU = 0; SCP21For the signal characteristic difference caused by the main connecting line between the 2nd CP to the first CP；SCALA includes the first CP to the main connecting line between calibrated channel, the signal characteristic difference sum caused by calibrated channel；The equation group two includes：
    STRX2+SCP2N+SCALB=SB2;
    Wherein, 861Represent the second loop where the first TRX to the data signal and the feature difference of raw digital signal after raw digital signal processing； SA2Represent TRX2Second loop at place is to the data signal and the feature difference of raw digital signal after raw digital signal processing； SCP1NFor the signal characteristic difference caused by the main connecting line between the first CP to N CP； SCP2NFor the 2nd CP to the signal characteristic difference caused by N CP main connecting line；SCALB includes N CP to the main connecting line between calibrated channel, the signal characteristic difference sum caused by calibrated channel.
    11st, TRX calibrator (-ter) units according to claim 10, it is characterised in that
    The processor, the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX that are additionally operable to according to caused by the benchmark TRX, and the first loop are equal to the first loop institute to the data signal and the feature difference of raw digital signal after raw digital signal processing Caused signal characteristic difference sum, determines the signal characteristic difference caused by the main connecting line between each CP to the first CP；And/or, the difference of signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX according to caused by the benchmark TRX, and second loop to the raw digital signal processing after data signal and raw digital signal feature difference be equal to the second loop caused by signal characteristic difference sum, determine the signal characteristic difference caused by the main connecting line between each CP to N CP.
    12nd, signal characteristic difference condition determines method caused by a kind of TRX, it is characterised in that including：Send raw digital signal；
    First loop and second loop are received respectively to the data signal after raw digital signal processing；Wherein, the first loop is by processor, DBF, corresponding CP, main connecting line, the first calibrated channel, processor are linked in sequence and formed with the DBF --- corresponding TRX, with the TRX ---；Second loop is by processor, DBF, corresponding CP, main connecting line, the second calibrated channel, processor are linked in sequence and formed with the DBF --- corresponding TRX, with the TRX ---；
    When signal characteristic difference is identical caused by each DBF, signal characteristic difference sum caused by being equal to the first loop to the data signal and the feature difference of raw digital signal after raw digital signal processing according to the first loop, and second loop to the raw digital signal processing after data signal and raw digital signal feature difference be equal to the second loop caused by signal characteristic difference sum, determine the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.
    13rd, signal characteristic difference determines method caused by a kind of TRX, it is characterised in that including：Control calibrated channel connects the first end of main connecting line, sends raw digital signal, receives the raw digital signal and passes through the data signal that first loop is returned；Wherein, the first loop is processor, DBF, corresponding CP, main connecting line, calibrated channel, processor are linked in sequence what is formed with the DBF --- corresponding TRX, with the TRX ---；
    Control calibrated channel connects the second end of main connecting line, sends the raw digital signal, receives the raw digital signal and passes through the data signal that second loop is returned；Wherein, the second loop be processor, DBF, corresponding CP, main connecting line, calibrated channel, processor are linked in sequence what is formed with the DBF --- corresponding TRX, with the TRX ---；
    When signal characteristic difference is identical caused by each DBF, signal characteristic difference sum caused by being equal to the first loop to the data signal and the feature difference of raw digital signal after raw digital signal processing according to the first loop, and second loop to the raw digital signal processing after data signal and raw digital signal feature difference be equal to the second loop caused by signal characteristic difference sum, determine the difference of the signal characteristic difference and the signal characteristic difference caused by other TRX in addition to the benchmark TRX caused by benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.
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