CN105634628A

CN105634628A - TRX calibration device and method for determining signal characteristic differences caused by TRX

Info

Publication number: CN105634628A
Application number: CN201510953205.6A
Authority: CN
Inventors: 何平华; 李少明; 刘学儒
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2011-06-24
Filing date: 2011-06-24
Publication date: 2016-06-01
Anticipated expiration: 2031-06-24
Also published as: CN105634628B

Abstract

The invention discloses a transceiver calibration device, comprising 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 also comprising a first calibration channel, a second calibration channel, a main connection line and a processor. The main connection line and the processor are both positioned between the first calibration channel and the second calibration channel. One end of each coupler is connected with the main connection line while the other end is connected with the corresponding transceiver respectively; 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 connected in sequence 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 connected in sequence to form a second loop.

Description

The signal characteristic difference condition defining method that TRX calibrator (-ter) unit and TRX cause

Technical field

The present invention relates to communication technical field, particularly to the signal characteristic difference condition defining method that a kind of transceiver T RX calibrator (-ter) unit and TRX cause.

Background technology

The inside of base station being connected to multiple antennas generally has multiple transceiver (Transceiver, it is called for short TRX), in order to aloft form satisfactory radiation lobe figure (Radiationpattern), require that the excitation amplitude of every road signal of multiple antennas, phase place, delay feature have to comply with specific distribution, say, that require that every road transceiver output amplitude of signal, phase place, delay feature meet specific distribution. Even if but every road transceiver all adopts same device, but owing to the core devices of transceiver remains analog device, thus the feature difference of the signal caused by the transceiver of every road (namely the amplitude of signal, phase place, delay variance) be still likely to different, so needing the feature difference of the signal caused by the transceiver of every road is compensated, namely transceiver is calibrated.

Fig. 1 illustrates a kind of architecture of base station figure adopting parallel calibration mode that prior art provides, and in order to the prior art is clearly described, is also shown for aerial array (RadiationArray) in Fig. 1. wherein, base station includes two parts, i.e. RRU (RadioRemoteUnit, Remote Radio Unit) and BBU (BuildingBasebandUnit, indoor baseband processing unit). interface between RRU and BBU is CPRI (CommonPublicRadioInterface, common public radio interface). include inside RRU: S/P module, COM module, multiple DBF (DigitalBeamForming, digital beam molding) module, multiple TRX and multiple CP (Coupler, bonder), multiplexer (Multiplexer), calibration channel (Calibrationchannel). wherein, S/P module is serioparallel exchange module, CPRI is received by it, signal (the such as signal for calibrating from BBU, it is called for short original calibration signals) carry out serioparallel exchange, obtain multichannel I/Q signal, it is assumed to be N road I/Q signal, N road I/Q signal is separately input in N number of DBF module, N number of DBF module is on all four original state, the output signal of N number of DBF module is input in N number of TRX, signal is modulated by N number of TRX, demodulation, Up/Down Conversion, amplify, filtering, A/D, D/A etc. process, radiofrequency signal after processing is sent to aerial array. N number of CP extracts N number of TRX module respectively and is sent to the radiofrequency signal of aerial array, deliver to multiplexer, the radiofrequency signal that N number of CP sends is multiplexed into calibration channel by multiplexer, each road radiofrequency signal is modulated, demodulates by calibration channel, Up/Down Conversion, filtering, A/D, D/A etc. are finally calibrated signal after processing, 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 control each DBF module and carry out feature compensation, in order to TRX is calibrated.

Each CP parallel join in such scheme, owing to calibrated channel can only know that each road TRX to CP, CP are to multiplexer, multiplexer to the feature difference of calibrated channel, but cannot be distinguished by this feature difference is that TRX causes, or CP causes to the line of multiplexer, so in order to seek the signal characteristic difference caused by N number of TRX, it is desirable to each road CP to calibrated channel path caused by signal characteristic difference identical.

Fig. 2 illustrates a kind of architecture of base station figure adopting serial calibrating mode that prior art provides, Fig. 2 and Fig. 1 is different in that: one end order of each CP is received on main connecting line, the other end of each CP 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 the 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.

Summary of the invention

The embodiment of the present invention provides the signal characteristic difference condition defining method that a kind of transceiver T RX calibrator (-ter) unit and TRX cause, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, can be obtained by the signal characteristic difference condition caused by TRX, so as to each TRX is carried out accurate calibration.

One aspect of the present invention provides:

A kind of transceiver T RX calibrator (-ter) unit, comprising: N number of digital beam forming module DBF, N number of with DBF TRX one to one, N number of with TRX bonder CP one to one, 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, one end of N number of CP connects described main connecting line, and the other end connects each self-corresponding TRX, and described TRX calibrator (-ter) unit also includes processor;

Wherein, processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, the first calibrated channel, processor are linked in sequence and form the first loop; Processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, the second calibrated channel, processor are linked in sequence and form the second loop;

Described processor, is used for sending raw digital signal, receives the digital signal after described raw digital signal is processed by described first loop and described second loop respectively, when the signal characteristic difference that each DBF causes is identical, digital signal and the feature difference of raw digital signal after described raw digital signal being processed according to the first loop are equal to the signal characteristic difference sum caused by the first loop, and second loop described raw digital signal is processed after the feature difference of digital signal and raw digital signal equal to the signal characteristic difference sum caused by the second loop, determine the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.

Another aspect of the present invention provides:

A kind of TRX calibrator (-ter) unit, comprising: N number of digital beam forming module DBF, N number of with DBF TRX one to one, N number of with TRX bonder CP, N one to one more than or equal to 2, also include calibrated channel, there is the main connecting line of the first end and the second end, one end of N number of CP connects described main connecting line, and the other end connects each self-corresponding TRX;

Wherein, calibrated channel under the control of a processor, connects described first end of main connecting line or described second end; When calibrated channel connects described first end, processor, DBF and described DBF TRX one to one and described TRX CP one to one, calibrated channel, processor are linked in sequence and form the first loop; When calibrated channel connects described second end, processor, DBF and described DBF TRX one to one and described TRX CP one to one, calibrated channel, processor are linked in sequence and form the second loop;

Described processor, is used for controlling calibrated channel and connects described first end or described second end, when calibrated channel connects described first end, send raw digital signal, receives the digital signal after described raw digital signal is processed by described first loop, when calibrated channel connects described second end, send raw digital signal, receive the digital signal after described raw digital signal is processed by described second loop, when the signal characteristic difference that each DBF causes is identical, digital signal and the feature difference of raw digital signal after described raw digital signal being processed according to the first loop are equal to the signal characteristic difference sum caused by the first loop, and from the second loop, the feature difference of the digital signal after the process of described raw digital signal with raw digital signal is equal to the signal characteristic difference sum caused by the second loop, determine the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.

Another aspect of the invention provides:

The signal characteristic difference condition defining method that a kind of TRX causes, including:

Send raw digital signal;

Receive the digital signal after described raw digital signal is processed by described first loop and described second loop respectively; Wherein, the first loop is linked in sequence is formed by processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, the first calibrated channel, processor; Second loop is linked in sequence is formed by processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, the second calibrated channel, processor;

When the signal characteristic difference that each DBF causes is identical, digital signal and the feature difference of raw digital signal after described raw digital signal being processed according to the first loop are equal to the signal characteristic difference sum caused by the first loop, and second loop described raw digital signal is processed after the feature difference of digital signal and raw digital signal equal to the signal characteristic difference sum caused by the second loop, determine the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.

Another aspect of the invention provides:

The signal characteristic difference defining method that a kind of TRX causes, including:

Control calibrated channel and connect the first end of main connecting line, send raw digital signal, receive the digital signal that described raw digital signal returns through described first loop; Wherein, the first loop is processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, calibrated channel, processor are linked in sequence and are formed;

Control calibrated channel and connect the second end of main connecting line, send described raw digital signal, receive the digital signal that described raw digital signal returns through described second loop; Wherein, the second loop is processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, calibrated channel, processor are linked in sequence and are formed;

One embodiment of the invention is linked in sequence is formed the first loop by processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, the first calibrated channel, processor, processor, DBF, with described DBF TRX one to one, with described TRX CP one to one, main connecting line, second calibrated channel, processor is linked in sequence and forms the second loop, the feature difference of the digital signal that processor is received and dispatched on two loops according to oneself is respectively equal to the signal characteristic difference sum caused by the two loop, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, it is assured that the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX, so as to each TRX is carried out accurate calibration.

Another embodiment of the present invention, when calibrated channel connects the first end of main connecting line, is linked in sequence is formed the first loop by processor, DBF and described DBF TRX one to one and described TRX CP one to one, calibrated channel, processor, when calibrated channel connects the second end of main connecting line, by processor, DBF, with described DBF TRX one to one, with described TRX CP one to one, calibrated channel, processor is linked in sequence and forms the second loop, the feature difference of the digital signal that processor is received and dispatched on two loops according to oneself is respectively equal to the signal characteristic difference sum caused by the two loop, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, it is assured that the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX, so as to each TRX is carried out accurate calibration.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, the accompanying drawing used required in embodiment will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the architecture of base station figure adopting parallel calibration mode that prior art provides;

Fig. 2 is the architecture of base station figure adopting serial calibrating mode that prior art provides;

Fig. 3 is a kind of TRX calibrator (-ter) unit structure chart adopting serial calibrating mode that the embodiment of the present invention provides;

Fig. 4 is that launch party's upwards signal that the embodiment of the present invention provides specifically transmits direction schematic diagram;

Fig. 5 is that recipient's upwards signal that the embodiment of the present invention provides specifically transmits direction schematic diagram;

Fig. 6 is the another kind of TRX calibrator (-ter) unit structure chart adopting serial calibrating mode that the embodiment of the present invention provides;

Fig. 7 is another TRX calibrator (-ter) unit structure chart adopting serial calibrating mode that the embodiment of the present invention provides;

Fig. 8 is another TRX calibrator (-ter) unit structure chart adopting serial calibrating mode that the embodiment of the present invention provides;

Fig. 9 is a kind of TRX that the embodiment of the present invention provides signal characteristic difference defining method flow chart caused;

Figure 10 is the another kind of TRX that the embodiment of the present invention the provides signal characteristic difference defining method flow chart caused.

Detailed description of the invention

Consult Fig. 3, the embodiment of the present invention provides a kind of TRX calibrator (-ter) unit, this TRX calibrator (-ter) unit can be base station, comprising: N number of DBF20, N number of and DBF TRX30 one to one, N number of and TRX CP40 one to one, first calibrated channel the 50, second calibrated channel 60, main connecting line 55 between the first calibrated channel 50 and the second calibrated channel 60 and processor 10; Wherein, N number of DBF includes a DBF (i.e. DBF₁), the 2nd DBF (i.e. DBF₂), the 3rd DBF (i.e. DBF₃), the 4th DBF (i.e. DBF₄) ... NDBF (i.e. DBF_N); N number of TRX includes a TRX (i.e. TRX₁), the 2nd TRX (i.e. TRX₂), the 3rd TRX (i.e. TRX₃), the 4th TRX (i.e. TRX₄) ... NTRX (i.e. TRX_N); N number of CP includes a CP (i.e. CP₁), the 2nd CP (i.e. CP₂), the 3rd CP (i.e. CP₃), the 4th CP (i.e. CP₄) .... NCP (i.e. CP_N)��

Wherein, one end of N number of CP40 connects described main connecting line 55, and the other end connects each self-corresponding TRX30; Processor 10, DBF20 and described DBF20 TRX30 one to one and described TRX30 CP40 one to one, main connecting line the 55, first calibrated channel 50, processor 10 are linked in sequence and form the first loop; Processor 10, DBF20 and described DBF20 TRX30 one to one and described TRX30 CP40 one to one, main connecting line the 55, second calibrated channel 60, processor 10 are linked in sequence and form the second loop; Such as, as it is shown on figure 3, processor 10, DBF₁, and described DBF₁TRX one to one₁, and described TRX₁CP one to one₁, main connecting line the 55, first calibrated channel 50, processor 10 be linked in sequence formation the first loop; Processor 10, DBF₁, and described DBF₁TRX one to one₁, and described TRX₁CP one to one₁, main connecting line the 55, second calibrated channel 60, processor 10 be linked in sequence formation the second loop.

Described processor, is used for sending raw digital signal, receives the digital signal after described raw digital signal is processed by described first loop and described second loop respectively, when the signal characteristic difference that each DBF causes is identical, digital signal and the feature difference of raw digital signal after described raw digital signal being processed according to the first loop are equal to the signal characteristic difference sum caused by the first loop, and second loop described raw digital signal is processed after the feature difference of digital signal and raw digital signal equal to the signal characteristic difference sum caused by the second loop, determine the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX, benchmark TRX can be TRX₁, it is also possible to it is TRX_N, do not affect the realization of the present invention. Signal characteristic difference caused by benchmark TRX is: the change of the amplitude of variation of the signal caused by benchmark TRX, phase place and/or time delay, and namely the input signal of benchmark TRX output signal after this benchmark TRX is relative to the amplitude of variation of this input signal, phase place change and/or time delay.

Described processor, can also the difference of signal characteristic difference caused by determined benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX, control each DBF signal characteristic difference that each TRX is caused to compensate, make the signal characteristic difference caused by DBF and the TRX on each loop identical. Following illustration: as it is shown on figure 3, for processor 10, DBF₁, and described DBF₁TRX one to one₁, and described TRX₁CP one to one₁, main connecting line the 55, first calibrated channel 50, processor 10 be linked in sequence the first loop formed; And, processor 10, DBF₂, and described DBF₂TRX one to one₂, and described TRX₂CP one to one₂, main connecting line the 55, first calibrated channel 50, processor 10 be linked in sequence the first loop formed; And processor 10, DBF_N, and described DBF_NTRX one to one_N, and described TRX_NCP one to one_N, main connecting line the 55, first calibrated channel 50, processor 10 be linked in sequence the first loop formed, DBF₁With TRX₁Caused signal characteristic difference, DBF₂With TRX₂Caused signal characteristic difference, DBF_NWith TRX_NCaused signal characteristic difference three should be identical, in order to ensures that the excitation amplitude of every road signal of multiple antennas, phase place, delay feature meet specific distribution.

Following to utilize launch party to asking the signal characteristic difference caused by TRX that this embodiment is described in detail:

Processor 10, for sending raw digital signal to N number of DBF.

N number of DBF20, for being sent to each self-corresponding TRX by each raw digital signal from processor. Namely each raw digital signal is respectively through DBF₁��DBF₂��DBF₃��DBF₄......DBF_N, arrive each TRX with same signal characteristic₁��TRX₂��TRX₃��TRX₄......TRX_N��

N number of TRX30, for the raw digital signal from DBF is processed, exports radiofrequency signal; I.e. TRX₁��TRX₂��TRX₃��TRX₄......TRX_NRespectively the raw digital signal received is carried out DA conversion, modulation, upconversion process, obtain radiofrequency signal, and export radiofrequency signal.

N number of CP40, for extracting the radiofrequency signal of N number of TRX output;

Main connecting line 55, for being transferred to described first calibrated channel 50 and described second calibrated channel 60 respectively by the radiofrequency signal that described N number of TRX exports;

First calibrated channel 50, processes for the radiofrequency signal that the N number of CP carrying out autonomous connecting line 55 is extracted, obtains N number of first kind digital signal, N number of first kind digital signal is sent to processor 10; Concrete, N number of CP radiofrequency signal extracted is carried out down-converted, demodulation, AD conversion by the first calibrated channel 50, obtains N number of first kind digital signal.

Second calibrated channel 60, processes for the radiofrequency signal that the N number of CP carrying out autonomous connecting line 55 is extracted, obtains N number of Equations of The Second Kind digital signal, N number of Equations of The Second Kind digital signal is sent to processor 10. Concrete, N number of CP radiofrequency signal extracted is carried out down-converted, demodulation, AD conversion by the second calibrated channel 50, obtains N number of Equations of The Second Kind digital signal.

Processor 10, is additionally operable to receive N number of first kind digital signal and N number of Equations of The Second Kind digital signal.

For the first loop, equation below group one set up by processor:

SDBF₁+STRX₁+SCP₁₁+ SCALA=SA₁

SDBF₂+STRX₂+SCP₂₁+ SCALA=SA₂

......

SDBF_N+STRX_N+SCP_N1+ SCALA=SA_N

Wherein, SDBF₁��SDBF₂.....SDBF_NRepresent DBF respectively₁��DBF₂......DBF_NCaused signal characteristic difference, wherein, DBF₁��DBF₂......DBF_NCaused signal characteristic difference is: DBF₁��DBF₂......DBF_NThe caused amplitude of variation of signal, phase place change and/or time delay, particularly as follows: DBF (such as DBF₁��DBF₂......DBF_N) input signal after this DBF output signal relative to the amplitude of variation of this input signal, phase place change and/or time delay. In the embodiment of the present invention, during due to calibration, each DBF resets, then the signal characteristic difference caused by each DBF is identical, it can be assumed that SDBF₁��SDBF₂.....SDBF_NIt is all 0.

Wherein, STRX₁��STRX₂......STRX_NRepresent TRX respectively₁��TRX₂......TRX_NCaused signal characteristic difference. TRX₁Caused signal characteristic difference is: this TRX₁Input signal through TRX₁After output signal relative to the amplitude of variation of this input signal, phase place change and/or time delay. TRX₂......TRX_NThe definition of caused signal characteristic difference is similar to it, does not repeat them here.

Wherein, SCP₁₁��SCP₂₁��SCP_N1Represent each CP to CP respectively₁Between the signal characteristic difference caused by main connecting line; Wherein, each CP to CP₁Between the signal characteristic difference caused by main connecting line be: each CP arrives CP₁Between the amplitude of variation of the signal caused by main connecting line, phase place change and/or time delay.

Now, SCP₁₁=0; SCP₂₁For CP₂To CP₁Between the signal characteristic difference caused by main connecting line; SCALA represents signal characteristic difference caused during the first calibration multi-channel operation, and this signal characteristic difference is all identical for any first loop, and this signal characteristic difference includes CP₁To the main connecting line between the first calibrated channel, signal characteristic difference sum caused by the first calibrated channel, i.e. CP₁To the signal characteristic difference caused by the main connecting line between the first calibrated channel, with the signal characteristic difference sum caused by the first calibrated channel. Wherein, CP₁To the signal characteristic difference caused by the main connecting line between the first calibrated channel it is: CP₁To the amplitude of variation of signal caused by the main connecting line between the first calibrated channel, phase place change and/or time delay. Signal characteristic difference caused by first calibrated channel is: the input signal of this first calibrated channel output signal after the first calibrated channel is relative to the amplitude of variation of this input signal, phase place change and/or time delay, and namely the amplitude of variation of the signal caused by the first calibrated channel, phase place change and/or time delay.

Wherein, SA₁��SA₂.....SA_NRepresent each raw digital signal and the first loop feature difference to the digital signal after raw digital signal process respectively; Such as, SA₁Represent TRX₁First loop at the place feature difference to the digital signal after raw digital signal process with raw digital signal; SA₂Represent TRX₂First loop at the place feature difference to the digital signal after raw digital signal process with raw digital signal.

For the second loop, equation below group two set up by processor:

SDBF₁+STRX₁+SCP_1N+ SCALB=SB₁

SDBF₂+STRX₂+SCP_2N+ SCALB=SB₂

......

SDBF_N+STRX_N+SCP_NN+ SCALB=SB_N

Wherein, SDBF₁��SDBF₂.....SDBF_NDefinition and STRX₁��STRX₂......STRX_NDefinition as hereinbefore, do not repeat them here.

Wherein, SCP_1N��SCP_2N��SCP_NNRepresent each CP to CP respectively_NBetween the signal characteristic difference caused by main connecting line; Wherein, each CP to CP_NBetween the signal characteristic difference caused by main connecting line be: each CP arrives CP_NBetween the amplitude of variation of the signal caused by main connecting line, phase place change and/or time delay. Now, SCP_NN=0; SCP_1NFor CP₁To CP_NBetween the signal characteristic difference caused by main connecting line; SCP_2NFor CP₂To CP_NBetween the signal characteristic difference caused by main connecting line; SCALB represents signal characteristic difference caused during the second calibration multi-channel operation, and this signal characteristic difference is all identical for any second loop, and this signal characteristic difference includes CP_NTo the main connecting line between the second calibrated channel, signal characteristic difference sum caused by the second calibrated channel, i.e. CP_NTo the signal characteristic difference caused by the main connecting line between the second calibrated channel, with the signal characteristic difference sum caused by the second calibrated channel. CP_NTo the signal characteristic difference caused by the main connecting line between the second calibrated channel it is: CP_NTo the amplitude of variation of signal caused by the main connecting line between the second calibrated channel, phase place change and/or time delay. Signal characteristic difference caused by second calibrated channel is: the input signal of this second calibrated channel output signal after the second calibrated channel is relative to the amplitude of variation of this input signal, phase place change and/or time delay, and namely the amplitude of variation of the signal caused by the second calibrated channel, phase place change and/or time delay.

Wherein, SB₁��SB₂.....SB_NRepresent each raw digital signal and the second loop feature difference to the digital signal after raw digital signal process respectively; Such as, SB₁Represent TRX₁Second loop at the place feature difference to the digital signal after raw digital signal process with raw digital signal; SB₂Represent TRX₂Second loop at the place feature difference to the digital signal after raw digital signal process with raw digital signal.

In the embodiment of the present invention, main connecting line 55 connects one end of N number of CP respectively, wherein, main connecting line 55 has passivity: the delay feature of the signal caused by a CP to another CP on the main connecting line of signal 55 is equal to the delay feature of this signal caused by another CP to one CP described. According to this passivity, processor is pre-configured with equation below group three:

SCP_1N=SCP_N1-SCP₁₁

SCP_2N=SCP_N1-SCP₂₁

...,

SCP_NN=SCP_N1-SCP_N1

Wherein, SCP₁₁=SCP₂₂.....SCP_NN=0;

And SCP₃₁=SCP₂₁+SCP₃₂

Processor, according to above-mentioned equation group one, obtains:

STRX₂-STRX₁=SA₂-SA₁+SCP₁₁-SCP₂₁(1)

Processor, according to above-mentioned equation group two, obtains:

STRX₂-STRX₁=SB₂-SB₁-(SCP_2N-SCP_1N)(2)

Processor, according to above-mentioned equation group three, obtains:

SCP_2N-SCP_1N=SCP₁₁-SCP₂₁(3)

Processor, according to above-mentioned formula (1), (2), (3), obtains:

STRX₂-STRX₁=0.5* (SA₂-SA₁+SB₂-SB₁)(4)

According to similar calculation, processor obtains:

(STRX₃-STRX₁)=0.5* (SA₃+SB₃-SA₁-SB₁), (5)

......

(STRX_N-STRX₁)=0.5* (SA_N+SB_N-SA₁-SB₁)(6)

Owing to, in TRX calibrator (-ter) unit running, TRX calibration is the customary activity to carry out at any time. Because environment (such as temperature, traffic load, power down etc.) changes, capital causes that the characteristic of each TRX changes, therefore the signal characteristic difference caused by each TRX also can change, it is necessary to restart calibration, but CP value will not change with environment. So processor can carry out a TRX after electrifying startup calibrates and try to achieve CP value, then each CP value is saved. So, later when the first calibrated channel damages, it is possible to according to equation group two, trying to achieve the difference with the signal characteristic difference caused by other TRX except described benchmark TRX of the signal characteristic difference caused by benchmark TRX, wherein, benchmark TRX can be TRX₁, at this point it is possible to try to achieve TRX according to equation group two₂��TRX₃.....TRX_NCaused signal characteristic difference and TRX₁The difference of caused signal characteristic difference. When the second calibrated channel damages, it is possible to according to equation group one, trying to achieve the difference with the signal characteristic difference caused by other TRX except described benchmark TRX of the signal characteristic difference caused by benchmark TRX, wherein, benchmark TRX can be TRX₁, at this point it is possible to try to achieve TRX according to equation group one₂��TRX₃.....TRX_NCaused signal characteristic difference and TRX₁The difference of caused signal characteristic difference.

Concrete, processor described below solves the process of CP value:

1), each CP to CP is sought₁Between the signal characteristic difference caused by main connecting line

The first of equation group one equation and second equation are subtracted each other, it is possible to obtain:

STRX₂-STRX₁=SA₂-SA₁+SCP₁₁-SCP₂₁

Above-mentioned formula (4) is substituted into this formula, and due to SCP₁₁=0, therefore can obtain SCP₂₁Value;

In like manner, first equation of equation group one and the 3rd equation are subtracted each other, it is possible to obtain:

STRX₃-STRX₁=SA₃-SA₁+SCP₁₁-SCP₃₁

Above-mentioned formula (5) is substituted into this formula, and due to SCP₁₁=0, therefore can obtain SCP₃₁Value;

In like manner, first equation of equation group one and last equation are subtracted each other, it is possible to obtain:

STRX_N-STRX₁=SA_N-SA₁+SCP₁₁-SCP_N1

Above-mentioned formula (6) is substituted into this formula, and due to SCP₁₁=0, therefore can obtain SCP_N1Value.

2), each CP to CP is sought_NBetween the signal characteristic difference caused by main connecting line

The first of equation group two equation and second equation are subtracted each other, it is possible to obtain:

STRX₂-STRX₁=SB₂-SB₁+SCP_2N-SCP_1N

Further according to the first two equation of equation group three, and SCP_1N=SCP_N1, SCP₁₁=0, it is possible to obtain SCP_2N��

In like manner, it is possible to obtain SCP_3N��SCP_4N.....SCP_NN��

As it is shown on figure 3, TRX calibrator (-ter) unit can also include the first multiplexing demultiplexing device 70 and the second multiplexing demultiplexing device 80 in this embodiment, it is different in that with above-mentioned TRX calibrator (-ter) unit:

Main connecting line 55, for being transferred to the first multiplexer 70 and the second multiplexer 80 respectively by N number of TRX radiofrequency signal exported;

First multiplexer 70, the radiofrequency signal specifically for N number of TRX output of autonomous connecting line in the future is sent to the first calibrated channel 50;

Second multiplexer 80, the radiofrequency signal specifically for N number of TRX output of autonomous connecting line in the future is sent to the second calibrated channel 60;

First calibrated channel 50, for the radiofrequency signal extracted of the N number of CP from the first multiplexer 70 is processed, obtains N number of first kind digital signal, N number of first kind digital signal is sent to processor 10;

Second calibrated channel 60, for the radiofrequency signal extracted of the N number of CP from the second multiplexer 80 is processed, obtains N number of Equations of The Second Kind digital signal, N number of Equations of The Second Kind digital signal is sent to processor 10.

And the particular content of the represented signal characteristic difference of SCALA and SCALB is different: the signal characteristic difference that SCALA represents includes CP₁To the signal characteristic difference sum caused by the main connecting line between the first calibrated channel, the first multiplexer, the first calibrated channel; The signal characteristic difference that SCALB represents includes CP_NTo 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 to make the annexation between CP40, TRX30, main connecting line, the first calibrated channel, the second calibrated channel become apparent from, Fig. 4 illustrates the annexation between CP40, TRX30, main connecting line, the first calibrated channel, the second calibrated channel, and when this embodiment asks the signal characteristic difference caused by TRX signal specifically transmit direction. Wherein, CP40 includes 4 ends, i.e. the first end the 41, second end the 42, the 3rd end 43 and the 4th end 44, wherein, the first termination TRX, second end 42 connects main connecting line, 3rd termination aerial array, what equipment the 4th end does not take over, optionally, this CP40 can also only include 3 ends, i.e. first end the 41, second end the 42, the 3rd end 43.

The embodiment of the present invention is linked in sequence is formed the first loop by processor, DBF and the DBF CP one to one of TRX and TRX one to one, main connecting line, the first calibrated channel, processor; Processor, DBF and the DBF CP one to one of TRX and TRX one to one, main connecting line, the second calibrated channel, processor are linked in sequence and form the second loop; Processor is respectively equal to the signal characteristic difference sum caused by the two loop according to the difference of the digital signal of transmitting-receiving on launch party upwards two loops, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, it is assured that the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX, so as to each TRX is carried out accurate calibration.

Processor 10, for sending raw digital signal to the first calibrated channel 50 and the second calibrated channel 60; Concrete, it is possible to being send raw digital signal in the first moment to the first calibrated channel 50, send raw digital signal in the second moment to the second calibrated channel 60, namely timesharing sends raw digital signal to the first calibrated channel 50 and the second calibrated channel 60;

First calibrated channel 50, for processing the raw digital signal from processor, it is thus achieved that first kind radiofrequency signal also exports described main connecting line 55; Concrete, the raw digital signal from processor is carried out DA conversion, modulation, upconversion process, obtains first kind radiofrequency signal, first kind radiofrequency signal is exported described main connecting line 55;

Second calibrated channel 60, for processing the raw digital signal from processor, it is thus achieved that Equations of The Second Kind radiofrequency signal exports described main connecting line 55; Concrete, the raw digital signal from processor is carried out DA conversion, modulation, upconversion process, obtains Equations of The Second Kind radiofrequency signal, Equations of The Second Kind radiofrequency signal is exported described 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 CP40, first kind radiofrequency signal and Equations of The Second Kind radiofrequency signal for autonomous connecting line in the future are sent respectively to described N number of TRX, i.e. CP₁��CP₂��CP₃��CP_NIn the future the first kind radiofrequency signal of autonomous connecting line and Equations of The Second Kind radiofrequency signal are sent respectively to TRX₁��TRX₂��TRX₃��TRX_N��

N number of TRX30, for the first kind radiofrequency signal from described N number of CP is processed, output first kind digital signal is to N number of DBF; Equations of The Second Kind radiofrequency signal from described N number of CP is processed, and output Equations of The Second Kind digital signal is to N number of DBF; Concrete, first kind radiofrequency signal is carried out down-converted, demodulation, AD conversion by each TRX, obtains first kind digital signal; Equations of The Second Kind radiofrequency signal is carried out down-converted, demodulation, AD conversion, obtains Equations of The Second Kind digital signal; TRX₁��TRX₂��TRX₃��TRX₄��TRX_NRespectively first kind digital signal and Equations of The Second Kind digital signal are sent to DBF₁��DBF₂��DBF₃��DBF_N;

N number of DBF20, for the N number of first kind digital signal from N number of TRX is sent to described processor, is sent to described processor by the N number of Equations of The Second Kind digital signal from N number of TRX.

Processor 10, for receiving N number of first kind digital signal and N number of Equations of The Second Kind digital signal, subsequent processor 10 sets up equation group one, equation group two, and solve the signal characteristic difference caused by benchmark TRX and the difference of the signal characteristic difference caused by other TRX except described benchmark TRX, and solve each CP to CP₁Between the signal characteristic difference caused by main connecting line and solve each CP to CP_NBetween mode and the TRX in above-mentioned transmitting direction of the signal characteristic difference caused by main connecting line to calibrate the process solved in embodiment identical, do not repeat them here.

It should be understood that processor timesharing sends raw digital signal to the first calibrated channel 50 and the second calibrated channel 60, also timesharing first kind digital signal and Equations of The Second Kind digital signal will be received, so, processor just can distinguish reception digital signal which be the digital signal after the first loop processed, which is the digital signal after the second loop processed, just can distinguish the first digital signal and the second digital signal, so that by the first digital signal and raw digital signal, second digital signal and raw digital signal are contrasted, obtain the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX.

Wherein, in order to make the annexation between CP40, TRX30, main connecting line, the first calibrated channel, the second calibrated channel become apparent from, Fig. 5 illustrates the annexation between CP40, TRX30, main connecting line, the first calibrated channel, the second calibrated channel, and this embodiment is asked caused by TRX signal characteristic difference time signal specifically transmit direction, the structure of CP40 is identical with Fig. 4, does not repeat them here.

Optionally, it is also possible to include the first demultiplexer 70 and the second demultiplexer 80, be different in that with above-mentioned TRX calibrator (-ter) unit:

First calibrated channel 50, for processing the raw digital signal from processor, it is thus achieved that first kind radiofrequency signal also exports the first demultiplexer 70; Concrete, the raw digital signal from processor is carried out DA conversion, modulation, upconversion process, obtains first kind radiofrequency signal, first kind radiofrequency signal is exported to the first demultiplexer 70;

Second calibrated channel 60, for processing the raw digital signal from processor, it is thus achieved that Equations of The Second Kind radiofrequency signal exports the second demultiplexer 80; Concrete, the raw digital signal from processor is carried out DA conversion, modulation, upconversion process, obtains Equations of The Second Kind radiofrequency signal, Equations of The Second Kind radiofrequency signal is exported to the second demultiplexer 80;

First demultiplexer 70, specifically for exporting to main connecting line by first kind radiofrequency signal;

Second demultiplexer 80, specifically for sending output to main connecting line by Equations of The Second Kind radiofrequency signal;

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 the particular content of the represented signal characteristic difference of SCALA and SCALB is different: the signal characteristic difference that SCALA represents includes CP₁To the signal characteristic difference sum caused by the main connecting line between the first calibrated channel, the first demultiplexer, the first calibrated channel; The signal characteristic difference that SCALB represents includes CP_NTo 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, sends the second raw digital signal to the second calibrated channel 50, and the first raw digital signal and the second raw digital signal are the digital signals of different coding; Concrete, processor 10 can send the first raw digital signal at synchronization to the first calibrated channel 50, sends the second raw digital signal to the second calibrated channel 50, it is also possible to do not sending in the same time, does not affect the realization of the present invention.

First calibrated channel 50, for processing the first raw digital signal from processor 10, it is thus achieved that first kind radiofrequency signal also exports described main connecting line 55;

Second calibrated channel 60, for processing the second raw digital signal from processor, it is thus achieved that Equations of The Second Kind radiofrequency signal exports described main connecting line 55;

Follow-up main connecting line 55, N number of CP40, N number of TRX30, N number of DBF20, processor 10 function identical with foregoing description, do not repeat them here.

So, owing to the first raw digital signal and the second raw digital signal are the digital signals of different coding, then first kind radiofrequency signal and Equations of The Second Kind radiofrequency signal are also the signals of different coding, so, processor 10 just can distinguish the first digital signal and the second digital signal, by the first digital signal and the first raw digital signal, the second digital signal and the second raw digital signal to be contrasted, obtain the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX.

The embodiment of the present invention is linked in sequence is formed the first loop by processor, DBF and the DBF CP one to one of TRX and TRX one to one, main connecting line, the first calibrated channel, processor; Processor, DBF and the DBF CP one to one of TRX and TRX one to one, main connecting line, the second calibrated channel, processor are linked in sequence and form the second loop; Processor is respectively equal to the signal characteristic difference sum caused by the two loop according to the difference of the digital signal of transmitting-receiving on recipient upwards two loops, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, it is assured that the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX, so as to each TRX is carried out accurate calibration.

Consulting Fig. 6, the embodiment of the present invention provides another kind of TRX calibrator (-ter) unit, and it differs primarily in that with embodiment illustrated in fig. 3, and this TRX calibrator (-ter) unit also includes: serioparallel exchange module/conjunction road module 90, indoor baseband processing module 40. Interface between serioparallel exchange module/conjunction road 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 road I/Q signal, is separately input in N number of DBF module by N road I/Q signal; N number of DBF module is sent to each self-corresponding TRX after N road I/Q signal is carried out feature compensation; The signal received is carried out DA conversion, modulation, upconversion process by N number of TRX respectively, obtains radiofrequency signal, and exports radiofrequency signal to antenna. N number of TRX receives the radiofrequency signal from antenna, the radiofrequency signal from antenna is carried out down-converted, demodulation, AD conversion, obtains digital signal, and digital signal is sent to respective DBF; N number of DBF module is sent to conjunction road module 90 after N railway digital signal is carried out feature compensation; Close after the digital signal from N number of DBF is carried out conjunction road by road module 90 and be sent to indoor baseband processing module 40.

In a kind of detailed description of the invention, serioparallel exchange module/conjunctions road module 90 and processor 10 can integrated on one module.

The embodiment of the present invention is after the feature difference that TRX is caused by processor control DBF module compensates, ensure that the excitation amplitude of every road signal of multiple antennas, phase place, delay feature have to comply with specific distribution, namely aloft form satisfactory radiation lobe figure.

Consult Fig. 7, the embodiment of the present invention provides another kind of TRX calibrator (-ter) unit, with differring primarily in that of above-described embodiment, this TRX calibrator (-ter) unit only needs a calibrated channel, this TRX calibrator (-ter) unit includes: N number of DBF200, N number of with DBF TRX300 one to one, N number of with TRX CP400 one to one, calibrated channel 500, there is the main connecting line 550 of the first end 551 and the second end 552, processor 100, wherein, one end of N number of CP connects described main connecting line, the other end connects each self-corresponding TRX, calibrated channel 500 is under the control of a processor, connect the first end 551 or the second end 552 of main connecting line 550, wherein, N number of DBF includes a DBF (i.e. DBF₁), the 2nd DBF (i.e. DBF₂), the 3rd DBF (i.e. DBF₃), the 4th DBF (i.e. DBF₄) ... NDBF (i.e. DBF_N); N number of TRX includes a TRX (i.e. TRX₁), the 2nd TRX (i.e. TRX₂), the 3rd TRX (i.e. TRX₃), the 4th TRX (i.e. TRX₄) ... NTRX (i.e. TRX_N); N number of CP includes a CP (i.e. CP₁), the 2nd CP (i.e. CP₂), the 3rd CP (i.e. CP₃), the 4th CP (i.e. CP₄) .... NCP (i.e. CP_N)��

Wherein, when calibrated channel connects the first end 551 of main connecting line 550, processor, DBF and the DBF CP one to one of TRX and TRX one to one, main connecting line, calibrated channel, processor are linked in sequence and form the first loop; When calibrated channel connects the second end 552 of main connecting line 550, processor, DBF and the DBF CP one to one of TRX and TRX one to one, main connecting line, calibrated channel, processor are linked in sequence and form the second loop; Such as, as it is shown in fig. 7, when calibrated channel connects the first end 551 of main connecting line 550, processor 100, DBF₁, and DBF1 TRX one to one₁, and TRX₁CP one to one₁, main connecting line 550, calibrated channel 500, processor 100 be linked in sequence formation the first loop; When calibrated channel connects the second end 552 of main connecting line 550, processor 100, DBF₁, and DBF₁TRX one to one₁, and TRX₁CP one to one₁, main connecting line 550, calibrated channel 500, processor 100 be linked in sequence formation the second loop.

Concrete, as shown in Figure 7, this TRX calibrator (-ter) unit can also include switch 700, described processor 100 is specifically for controlling the state of switch 700, the first end 551 making described calibrated channel 500 and main connecting line 550 is connected, or, the second end 552 of described calibrated channel 500 and main connecting line 550 is connected.

In this embodiment, the function of processor is identical with the function of processor in above-mentioned embodiment illustrated in fig. 3, do not repeat them here, specifically describe when the signal characteristic difference asked caused by TRX in a transmit direction as follows and the function of other elements during recipient's signal characteristic difference asked caused by TRX upwards:

During the signal characteristic difference asked caused by TRX in a transmit direction, N number of DBF, for being sent to each self-corresponding TRX by each raw digital signal from processor; N number of TRX, for the raw digital signal from DBF is processed, exports radiofrequency signal; N number of CP, for extracting the radiofrequency signal of N number of TRX output; Main connecting line, is used for the first end by main connecting line or the second end by N number of CP radio signal transmission extracted to calibrated channel; Calibrated channel, when being used for the first end connecing main connecting line, processes N number of CP radiofrequency signal extracted, obtains N number of first kind digital signal, N number of first kind digital signal is sent to processor; When connecing the second end of main connecting line, N number of CP radiofrequency signal extracted is processed, obtain N number of Equations of The Second Kind digital signal, N number of Equations of The Second Kind digital signal is sent to processor; Wherein, N number of first kind digital signal is: described first loop is to the digital signal after the process of described raw digital signal; N number of Equations of The Second Kind digital signal is: described second loop is to the digital signal after the process of described raw digital signal.

During the signal characteristic difference asked caused by TRX in a receive direction, N number of DBF, for being sent to each self-corresponding TRX by each raw digital signal from processor; N number of TRX, for the raw digital signal from DBF is processed, exports radiofrequency signal; N number of CP, for extracting the radiofrequency signal of N number of TRX output; Main connecting line, is used for the first end by main connecting line or the second end by N number of CP radio signal transmission extracted to calibrated channel; Calibrated channel, when being used for the first end connecing main connecting line, processes N number of CP radiofrequency signal extracted, obtains N number of first kind digital signal, N number of first kind digital signal is sent to processor; When connecing the second end of main connecting line, N number of CP radiofrequency signal extracted is processed, obtain N number of Equations of The Second Kind digital signal, N number of Equations of The Second Kind digital signal is sent to processor; Wherein, N number of first kind digital signal is: described first loop is to the digital signal after the process of described raw digital signal; N number of Equations of The Second Kind digital signal is: described second loop is to the digital signal after the process of described raw digital signal.

Concrete, as it is shown in fig. 7, all right multiplexing demultiplexing device 600 of this TRX calibrator (-ter) unit, the function of multiplexing demultiplexing device 600 and the functional similarity of the first multiplexing demultiplexing device in above-described embodiment, the second multiplexing demultiplexing device, do not repeat them here.

The embodiment of the present invention, when the first end of calibrated channel connects main connecting line, is linked in sequence is formed the first loop by processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, calibrated channel, processor; When calibrated channel connects the second end of main connecting line, it is linked in sequence is formed the second loop by processor, DBF and described DBF TRX one to one and described TRX CP one to one, calibrated channel, processor; The feature difference of the digital signal that processor is received and dispatched on two loops according to oneself is respectively equal to the signal characteristic difference sum caused by the two loop, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, it is assured that the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX, so as to each TRX is carried out accurate calibration.

Consulting Fig. 8, the embodiment of the present invention provides another TRX calibrator (-ter) unit, and it differs primarily in that with embodiment illustrated in fig. 7, and this TRX calibrator (-ter) unit also includes: serioparallel exchange module/conjunction road module 900, indoor baseband processing module 400. Interface between serioparallel exchange module/conjunction road 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 road I/Q signal, is separately input in N number of DBF module by N road I/Q signal; N number of DBF module sends each self-corresponding TRX after N road I/Q signal is carried out feature compensation; The signal received is carried out DA conversion, modulation, upconversion process by N number of TRX respectively, obtains radiofrequency signal, and exports radiofrequency signal to antenna. N number of TRX receives the radiofrequency signal from antenna, the radiofrequency signal from antenna is carried out down-converted, demodulation, AD conversion, obtains digital signal, and digital signal is sent to respective DBF; N number of DBF module is sent to conjunction road module after N railway digital signal is carried out feature compensation; Close road module and the digital signal from N number of DBF is carried out baseband processing module 400 in He Luhou dispatcher's office.

In a kind of detailed description of the invention, serioparallel exchange module/conjunctions road module 900 and processor 100 can integrated on one module.

Consulting Fig. 9, the embodiment of the present invention provides a kind of TRX signal characteristic difference condition defining method caused, and the method adopts the TRX calibrator (-ter) unit that Fig. 3, embodiment illustrated in fig. 4 provide, and the method specifically includes:

901, processor sends raw digital signal.

Concrete, in this embodiment, the executive agent of each step can be processor.

902, the digital signal after described raw digital signal is processed by described first loop and described second loop is received respectively.

Wherein, the first loop is linked in sequence is formed by processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, the first calibrated channel, processor; Second loop is linked in sequence is formed by processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, the second calibrated channel, processor;

Concrete, sending raw digital signal in step 901 can be specifically that processor sends raw digital signal to each DBF, can also be that processor sends raw digital signal to the first calibrated channel and the second calibrated channel, digital signal after the process of described raw digital signal is the first kind digital signal in above-described embodiment by the first loop received in step 902, digital signal after the process of described raw digital signal is the Equations of The Second Kind digital signal in above-described embodiment by the second loop received in step 902, concrete raw digital signal in the first loop and the second loop processing procedure referring to the corresponding description in said apparatus embodiment, do not repeat them here.

903, when the signal characteristic difference that each DBF causes is identical, digital signal and the feature difference of raw digital signal after described raw digital signal being processed according to the first loop are equal to the signal characteristic difference sum caused by the first loop, and second loop described raw digital signal is processed after the feature difference of digital signal and raw digital signal equal to the signal characteristic difference sum caused by the second loop, determine the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.

Concrete, it is determined that the signal characteristic difference caused by benchmark TRX is similar to the description of said apparatus embodiment to the process of the difference of the signal characteristic difference caused by other TRX except described benchmark TRX, repeats no more at ratio.

Optionally, owing to, in TRX calibrator (-ter) unit running, TRX calibration is the customary activity to carry out at any time. Because the characteristic that environmental change can cause each TRX changes, therefore the signal characteristic difference caused by each TRX also can change, it is necessary to restart calibration, but CP value will not change with environment. So processor can carry out a TRX after electrifying startup calibrates and try to achieve CP value, then each CP value is saved. So, later when a calibrated channel damages, it is possible to (when such as the first calibrated channel damages, utilize equation group two according to the equation group that another calibrated channel is corresponding; When second calibrated channel damages, utilize equation group one) and the CP value that preserves, it is determined that the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX. Therefore can seek CP value in the following way: according to described difference, and the feature difference of first kind digital signal and raw digital signal is equal to described raw digital signal through the signal characteristic difference sum caused by the first loop, it is determined that each CP to CP₁Between the signal characteristic difference caused by main connecting line; According to described difference, and the feature difference of Equations of The Second Kind digital signal and raw digital signal is equal to described raw digital signal through the signal characteristic difference sum caused by the second loop, it is determined that each CP to CP_NBetween the signal characteristic difference caused by main connecting line. Wherein, each CP to the CP of concrete determination₁Between the process of the signal characteristic difference caused by main connecting line, and concrete each CP to the CP of determination_NBetween the process of the signal characteristic difference caused by main connecting line identical with the corresponding description of said apparatus embodiment, do not repeat them here.

In the embodiment of the present invention, the feature difference of the digital signal that processor is received and dispatched on two loops according to oneself is respectively equal to the signal characteristic difference sum caused by the two loop, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, it is assured that the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX, so as to each TRX is carried out accurate calibration.

Consult Figure 10, the embodiment of the present invention provides the another kind of TRX signal characteristic difference condition defining method caused, the method adopts the TRX calibrator (-ter) unit that Fig. 7, embodiment illustrated in fig. 8 provide, the method and said method are different in that, needing to control calibrated channel and connect the first end or second end of main connecting line, the method specifically includes:

1001, control calibrated channel and connect the first end of main connecting line, send raw digital signal, receive the digital signal that described raw digital signal returns through described first loop; Wherein, when the first loop is the first end that calibrated channel connects main connecting line, processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, calibrated channel, processor be linked in sequence formed.

1002, control calibrated channel and connect the second end of main connecting line, send described raw digital signal, receive the digital signal that described raw digital signal returns through described second loop; Wherein, when the second loop is the second end that calibrated channel connects main connecting line, processor, DBF and described DBF TRX one to one and described TRX CP one to one, main connecting line, calibrated channel, processor be linked in sequence formed.

Concrete, sending raw digital signal in step 1001 and step 1002 can be specifically that processor sends raw digital signal to each DBF, can also be that processor sends raw digital signal to the first calibrated channel and the second calibrated channel, digital signal after the process of described raw digital signal is the first kind digital signal in above-described embodiment by the first loop received in step 1001, digital signal after the process of described raw digital signal is the Equations of The Second Kind digital signal in above-described embodiment by the second loop received in step 1002, concrete raw digital signal in the first loop and the second loop processing procedure referring to the corresponding description in said apparatus embodiment, do not repeat them here.

1003, when the signal characteristic difference that each DBF causes is identical, digital signal and the feature difference of raw digital signal after described raw digital signal being processed according to the first loop are equal to the signal characteristic difference sum caused by the first loop, and second loop described raw digital signal is processed after the feature difference of digital signal and raw digital signal equal to the signal characteristic difference sum caused by the second loop, determine the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX.

Optionally, the method also comprises determining that each CP arrives CP₁The process of the signal characteristic difference caused by main connecting line, and determine that each CP arrives CP_NThe process of the signal characteristic difference caused by main connecting line, concrete implementation mode is identical with the implementation in said method embodiment, does not repeat them here.

In the embodiment of the present invention, processor control calibrated channel meets CP₁Or CP_NForm two loops, feature difference according to the digital signal oneself received and dispatched on two loops is respectively equal to the signal characteristic difference sum caused by the two loop, each CP need not be measured to the signal characteristic difference caused by the path of calibrated channel, it is assured that the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX, so as to each TRX is carried out accurate calibration.

One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method can be by the hardware that program carrys out instruction relevant and completes, described program can be stored in a kind of computer-readable recording medium, such as read only memory, disk or CD etc.

The TRX the calibrator (-ter) unit above embodiment of the present invention provided and determine that the method for the TRX signal characteristic difference condition caused is described in detail, principles of the invention and embodiment are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention; Simultaneously for one of ordinary skill in the art, according to the thought of the present invention, all will change in specific embodiments and applications, in sum, this specification content should not be construed as limitation of the present invention.

Claims

1. a transceiver T RX calibrator (-ter) unit, comprising: N number of digital beam forming module DBF, N number of with DBF TRX one to one, N number of with TRX bonder CP one to one, N is more than or equal to 2, it is characterized 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, one end of N number of CP connects described main connecting line, and the other end connects each self-corresponding TRX, and described TRX calibrator (-ter) unit also includes processor;

Described processor, for sending raw digital signal to each DBF, receives the digital signal after processor is processed by described first loop and described second loop to each DBF raw digital signal sent respectively, when the signal characteristic difference that each DBF causes is identical, digital signal after processor being processed to each DBF raw digital signal sent according to the first loop is equal to the signal characteristic difference sum caused by described first loop with processor to the feature difference of each DBF raw digital signal sent, and described second loop processor is processed to each DBF raw digital signal sent after digital signal with processor to the feature difference of each DBF raw digital signal sent equal to the signal characteristic difference sum caused by described second loop, determine the difference of the signal characteristic difference caused by benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX, wherein benchmark TRX is any one TRX in N number of TRX,

Described processor, it is additionally operable to the difference of the signal characteristic difference caused by the described benchmark TRX determined and the signal characteristic difference caused by other TRX except described benchmark TRX, control each DBF signal characteristic difference that each TRX is caused to compensate, make the signal characteristic difference caused by DBF and the TRX on each loop identical.

2. TRX calibrator (-ter) unit according to claim 1, it is characterised in that:

Described N number of DBF, for being sent to each self-corresponding TRX by each raw digital signal from processor;

Described N number of TRX, for the raw digital signal from DBF is processed, exports radiofrequency signal;

Described N number of CP, for extracting the radiofrequency signal of described N number of TRX output;

Described main connecting line, for being transferred to described first calibrated channel and described second calibrated channel respectively by the radiofrequency signal that described N number of TRX exports;

Described first calibrated channel, for the radiofrequency signal carrying out autonomous connecting line is processed, obtains N number of first kind digital signal, N number of first kind digital signal is sent to processor;

Described second calibrated channel, for the radiofrequency signal carrying out autonomous connecting line is processed, obtains N number of Equations of The Second Kind digital signal, N number of Equations of The Second Kind digital signal is sent to processor;

Wherein, N number of first kind digital signal is: described first loop to processor to each DBF raw digital signal sent process after digital signal; N number of Equations of The Second Kind digital signal is: described second loop to processor to each DBF raw digital signal sent process after digital signal.

3. the TRX calibrator (-ter) unit according to any one of claim 1 to 2, it is characterised in that

Described N number of CP includes CP and the two CP; N number of TRX includes TRX and the two TRX;

Described processor, is used for setting up equation below group one and equation group two, and the Simultaneous Equations consisted of group of equations one and equation group two determines the difference of the signal characteristic difference caused by a TRX and the signal characteristic difference caused by the 2nd TRX;

Described equation group one includes:

STRX₁+SCP₁₁+ SCALA=SA₁;

STRX₂+SCP₂₁+ SCALA=SA₂;

Wherein, SA₁Represent first loop at a TRX place processor is processed to the DBF raw digital signal sent after digital signal and processor to the feature difference of the DBF raw digital signal sent; SA₂Represent first loop at the 2nd TRX place processor is processed to the 2nd DBF raw digital signal sent after digital signal and processor to the feature difference of the 2nd DBF raw digital signal sent; SCP₁₁=0; SCP₂₁It is the signal characteristic difference caused by main connecting line between the 2nd CP to the oneth CP; SCALA includes the main connecting line between CP to first calibrated channel, signal characteristic difference sum caused by the first calibrated channel;

Described equation group two includes:

STRX₁+SCP_1N+ SCALB=SB₁;

STRX₂+SCP_2N+ SCALB=SB₂;

Wherein, SB₁Represent second loop at a TRX place processor is processed to the DBF raw digital signal sent after digital signal and processor to the feature difference of the DBF raw digital signal sent; SB₂Represent second loop at the 2nd TRX place processor is processed to the 2nd DBF raw digital signal sent after digital signal and processor to the feature difference of the 2nd DBF raw digital signal sent; SCP_1NIt is a CP to the signal characteristic difference caused by the main connecting line of NCP; SCP_2NIt is the signal characteristic difference caused by main connecting line between the 2nd CP to NCP; SCALB includes the main connecting line between NCP to second calibrated channel, signal characteristic difference sum caused by the second calibrated channel;

Wherein, STRX₁��STRX₂Represent the signal characteristic difference caused by a TRX, the 2nd TRX respectively.

4. TRX calibrator (-ter) unit according to claim 3, it is characterised in that

Described processor, it is additionally operable to the difference of the signal characteristic difference caused by described benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX, and first loop at each DBF place processor is processed to each DBF raw digital signal sent after digital signal with processor to the feature difference of each DBF raw digital signal sent equal to the signal characteristic difference sum caused by first loop at each DBF place, it is determined that the signal characteristic difference caused by main connecting line between each CP to the oneth CP; And/or, the difference of the signal characteristic difference caused by described benchmark TRX and the signal characteristic difference caused by other TRX except described benchmark TRX, and second loop at each DBF place processor is processed to each DBF raw digital signal sent after digital signal with processor to the feature difference of each DBF raw digital signal sent equal to the signal characteristic difference sum caused by second loop at each DBF place, it is determined that the signal characteristic difference caused by main connecting line between each CP to NCP.

5. TRX calibrator (-ter) unit according to claim 3, it is characterised in that described TRX calibrator (-ter) unit also includes the first multiplexing demultiplexing device and the second multiplexing demultiplexing device;

Described main connecting line, for being transferred to described first multiplexing demultiplexing device and described second multiplexing demultiplexing device respectively by the radiofrequency signal that described N number of TRX exports;

Described first multiplexing demultiplexing device is for being sent to described first calibrated channel by the radiofrequency signal that the described N number of TRX from described main connecting line exports;

Described second multiplexing demultiplexing device is for being sent to described second calibrated channel by the radiofrequency signal that the described N number of TRX from described main connecting line exports;

Described first calibrated channel, for the radiofrequency signal from described first multiplexing demultiplexing device is processed, obtains N number of first kind digital signal, N number of first kind digital signal is sent to processor;

Described second calibrated channel, for the radiofrequency signal from described second multiplexing demultiplexing device is processed, obtains N number of Equations of The Second Kind digital signal, N number of Equations of The Second Kind digital signal is sent to processor;

Described SCALA includes a described CP to the signal characteristic difference sum caused by the described main connecting line between described first calibrated channel, described first multiplexing demultiplexing device, described first calibrated channel;

Described SCALB includes described NCP to the described main connecting line between described second calibrated channel, signal characteristic difference sum caused by described second calibrated channel.

6. TRX calibrator (-ter) unit according to claim 1, it is characterised in that the signal characteristic difference caused by described benchmark TRX is the amplitude of variation of signal caused by described benchmark TRX, phase place change and/or time delay.

7. TRX calibrator (-ter) unit according to claim 1, it is characterised in that described TRX calibrator (-ter) unit is base station.