CN102244531B - Method and device for dynamically regulating antenna calibration position - Google Patents

Method and device for dynamically regulating antenna calibration position Download PDF

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Publication number
CN102244531B
CN102244531B CN201010177484.9A CN201010177484A CN102244531B CN 102244531 B CN102244531 B CN 102244531B CN 201010177484 A CN201010177484 A CN 201010177484A CN 102244531 B CN102244531 B CN 102244531B
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antenna calibration
time slot
antenna
calibration
inter
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CN102244531A (en
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徐红艳
陈东
康绍莉
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Abstract

The embodiment of the invention provides a method for dynamically regulating an antenna calibration position, comprising the following steps: measuring the interference power intensity Pinter of an initial antenna calibration TS (time slot) position Pos1 in accordance with signals eac received by the initial antenna calibration TS position Pos1; comparing the interference power intensity Pinter with the maximum transmission power Pmax of calibration sequences, and selecting the antenna calibration TS position in accordance with the comparison result; and according to the selected antenna calibration TS position, transmitting the calibration sequences to carry out the antenna calibration. The embodiment of the invention also provides a device for dynamically regulating the antenna calibration position, comprising a measurement module, a selection module and a calibration module. The method and device provided by the invention can be used to improve the antenna calibration accuracy, prevent the frequent warning of the antenna calibration and solve the problem that the intelligent antenna calibration is interfered.

Description

Method and device that a kind of antenna calibration position is dynamically adjusted
Technical field
The present invention relates to moving communicating field, particularly, the present invention relates to method and device that a kind of antenna calibration position is dynamically adjusted.
Background technology
Mobile and broadband becomes the developing direction of modern communication technology, and impact how to eliminate cochannel interference, multiple access interference and multipath fading becomes the principal element that people consider in the time improving mobile radio system performance.Intelligent antenna technology becomes a study hotspot in moving communicating field in recent years.
Intelligent antenna technology has brought huge advantage to mobile communication system.At present, intelligent antenna technology is as one of main direction of physical layer communication technical development.Intelligent antenna technology not only can use the Duplexing at TDD(Time Division, time division duplex) in system, also can use FDD(Frequency Division Duplex completely, Frequency Division Duplexing (FDD)) in system, the extensive use of smart antenna provides leading, a perfect technology platform for us just, and it has promoted the development of mobile communication technology to a certain extent.
In order to ensure that the wave beam main lobe of smart antenna has very little secondary lobe when pointing to expectation terminal, meet the requirement of user DOA estimated accuracy simultaneously, when smart antenna uses, require each bay radio-frequency channel property preservation of composition smart antenna consistent, therefore adopt in the system of smart antenna all with antenna calibration function.In smart antenna and MIMO (Multi-input Multi-output, multiple-input and multiple-output) system, antenna calibration has very important status.
Because transmission channel can adopt HPA(High Power Amplifier, high power amplifier) transmitting, and receive path can adopt LNA(Low Noise Amplifier, low noise amplifier) receive, these two active radio-frequency devices are completely independent, thereby it is inconsistent to cause receiving and dispatching radio-frequency channel.For TDD(Time Division Duplexing, time division duplex) system, up-downgoing adopts identical frequency receiving and transmitting signal, therefore, up-downgoing wireless channel has reciprocity, adopt uplink channel estimation result to carry out the transmission of downstream signal wave beam forming, and a series of processing procedures of signal are completed by baseband processing unit, thereby radio-frequency channel will be seen as a part for wireless channel, the inconsistency of up-downgoing radio-frequency channel will cause TDD system up-downgoing wireless channel not possess the requirement of reciprocity like this, realize wave beam forming for TDD system so and MIMO technology will be brought impact, therefore, in order to give full play to the advantage of smart antenna and MIMO technology, need to introduce antenna calibration technology, , by measuring in advance the width facial difference between each antenna radio-frequency channel in system, in signal process of transmitting, pass through difference compensation method, and consistency is received and dispatched in the radio-frequency channel of realizing between each reception antenna and between each transmitting antenna.
Fig. 1 shows 8 array element single-polarized antenna calibration coupling networks.As shown in fig. 1, existing antenna calibration mainly carries out periodic calibration by calibration coupling network, in radio frequency path, except active channel, increases calibration path.
In real system, base station has the feature that relative altitude is high, antenna gain is high, transmitting power is high conventionally, and the communication environments between base station is relatively better, and loss is little.In existing antenna calibration technology, the fixed position of antenna calibration time slot can be subject to the impact of inter base station interference, causes especially close alignment precise decreasing of antenna calibration, even cannot calibrate, and makes the frequent calibration alarm that occurs.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency, especially by antenna calibration position is dynamically adjusted, improves antenna calibration precision, prevents the frequent alarm of antenna calibration.
The one side of the embodiment of the present invention has proposed the method that a kind of antenna calibration position is dynamically adjusted, and comprising: the signal e receiving according to initial antenna calibration time slot position Pos1 ac, measure the interference power intensity P of described initial antenna calibration time slot position Pos1 inter;
By described interference power intensity P interwith calibrating sequence maximum transmit power P maxcompare, select antenna calibration time slot position according to comparative result;
Obtain antenna calibration time slot position according to described selection, send calibrating sequence, carry out antenna calibration.
Obtain antenna calibration time slot position according to described selection, send calibrating sequence, carry out antenna calibration.
The device that has proposed on the other hand the dynamic adjustment in a kind of antenna calibration position of the embodiment of the present invention, this device comprises measurement module, selects module and calibration module,
Described measurement module, for the signal e receiving according to initial antenna calibration time slot position Pos1 ac, measure the interference power intensity P of described initial antenna calibration time slot position Pos1 inter;
Described selection module, for by described interference power intensity P interwith calibrating sequence maximum transmit power P maxcompare, select antenna calibration time slot position according to comparative result;
Described calibration module, for obtaining antenna calibration time slot position according to described selection, sends calibrating sequence, carries out antenna calibration.
The method and apparatus providing according to the embodiment of the present invention, has improved antenna calibration precision, prevents the frequent alarm of antenna calibration, has solved the problem that intelligent antenna calibration is disturbed.
The aspect that the present invention is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
The present invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments obviously and easily and understand, wherein:
Fig. 1 is 8 array element single-polarized antenna calibration coupling networks;
Fig. 2 is antenna calibration time slot position schematic diagram;
Fig. 3 is according to the FB(flow block) of the antenna calibration position dynamic adjusting method of the embodiment of the present invention;
Fig. 4 dynamically adjusts schematic diagram according to the antenna calibration position of the embodiment of the present invention;
Fig. 5 dynamically adjusts the FB(flow block) of antenna calibration location method according to the UpPTS slot offset of utilizing of the embodiment of the present invention;
Fig. 6 is according to the structured flowchart of the antenna calibration position dynamic adjusting device of the embodiment of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
First antenna calibration and antenna calibration time slot position are introduced the present invention in order better to explain.Specifically, when antenna sends calibration, calibration path is in accepting state, and active channel is in transmission state.Active channel sends calibrating sequence in time slot fixed position, the calibrating sequence that the utilization of calibration path receives calculates phase place and the amplitude error of each path, and compensates amplitude and the phase difference of each active channel.
When antenna reception calibration, calibration path is in transmission state, and active channel is in accepting state, and the calibrating sequence that each active channel utilization receives calculates its phase place and amplitude, the line amplitude of going forward side by side and phase compensation.
Fig. 2 shows in TD-SCDMA system, the time slot position schematic diagram that antenna calibration sequence is fixing.As shown in Figure 2, AC(Antenna Calibration, antenna calibration) time slot, its length is 35chip.Antenna calibration Position Design, without any data, be applicable to carrying out antenna calibration in Main GP position in this position.Antenna calibration can not have influence on system signal transmitting-receiving, and system signal transmitting-receiving also can not affect antenna calibration.But in real system; base station has the feature that relative altitude is high, antenna gain is high, transmitting power is high conventionally; communication environments between base station is relatively better; loss is little; and TDD system is that to transmit and receive frequency identical; once the transmitted signal of other base station falls into the receiving slot of this base station; will inevitably cause the interference between base station; the hangover that is other base stations TS0 time slot and descending pilot frequency time slot (DwPTS time slot) can fall into protection time slot (Main GP time slot); can fall into antenna calibration time slot, certainly will exert an influence to the precision of antenna calibration.If interfering signal power is excessively strong, cannot calibrate.A kind of method that therefore, need to provide antenna calibration dynamically to adjust.
In order to realize the present invention's object, the invention discloses the method that a kind of antenna calibration position is dynamically adjusted, shown in Fig. 3, the method comprises the following steps:
S301: the signal e receiving according to initial antenna calibration time slot position Pos1 ac, the interference power intensity P of measurement initial antenna calibration time slot position Pos1 inter.
If initial antenna calibration time slot position Pos1 receives signal e ac, according to the interference power intensity P at this signal measurement Pos1 place inter.Wherein, interference power P intercomputational methods be:
P inter = 1 35 . K a Σ k a = 0 K a - 1 Σ i = 0 34 e ac ( ka , i ) ( e ac ( ka , i ) ) H
In above formula, ka is antenna sequence number, and Ka is antenna sum, and H is conjugate transpose computing, and i is reception data sequence number, i=0 ... 34.
S302: by interference power intensity P interwith calibrating sequence maximum transmit power P maxcompare, select antenna calibration time slot position according to comparative result.
According to the interference power intensity P measuring in step 301 inter, select antenna calibration time slot position.Shown in Fig. 4, establishing calibrating sequence maximum transmit power is P max, calibration network decay XdB, thresholding Threshold is selected in position,
As 10log10 (P max)-10log10 (P interwhen)-X>=Threshold, retain initial antenna calibration time slot position Pos1, send calibrating sequence at Pos1;
As 10log10 (P max)-10log10 (P inter)-X < Threshold, adjusting antenna calibration time slot position is Pos2, sends calibrating sequence at Pos2.
Wherein, the slot length of antenna calibration time slot is 35chip.
In the present embodiment, position selects thresholding Threshold to determine by the method for emulation and test.X is relevant to coupler and the feeder line length etc. of calibration network in calibration network decay.
S303: according to selecting to obtain antenna calibration time slot position, send calibrating sequence, carry out antenna calibration.
According to obtaining antenna calibration time slot position in step 302, send calibrating sequence in this position, complete antenna calibration.Wherein, antenna calibration is periodic calibration mode, comprises transmitting calibration and receives calibration.
The method providing according to the embodiment of the present invention, by dynamic adjustment antenna calibration time slot position, has improved antenna calibration precision, prevents the frequent alarm of antenna calibration, has solved the problem that intelligent antenna calibration is disturbed.
In addition, antenna calibration generally adopts the mode of period regulation, if in the time of antenna calibration, UpPTS time slot has user's access, can affect user's access.In order not affect user's access, the embodiment of the present invention also proposes by judging that UpPTS is displaced to other ascending time slots, dynamically adjusts the method for antenna calibration time slot.Shown in Fig. 5, the method comprises the steps:
S501: judge according to system UpPTS on-position whether uplink pilot time slot is displaced to other ascending time slots.
Due to the existence of inter base station interference, in TD-SCDMA system, introduced at present UpPTSShifting mechanism, that is, in the time that interference effect arrives the detection of UpPTS time slot, UpPTS slot offset is arrived to other ascending time slots, for example TS1 time slot.
Specifically, in the time of P >=Threshold_UpPTS, wherein P is the interference between base station, and Threshold_UpPTS is the threshold value that UpPTS time slot detects, and judges that uplink pilot time slot UpPTS slot offset is to other ascending time slots.
UpPTS time slot detect uplink synchronous code send to base station side by terminal, due to the existence of spatial loss, the signal that base station receives is lower, generally-below 80dBm.But calibrating signal be by calibration network directly by antenna reception, not Existential Space propagation loss.Therefore with respect to uplink synchronous code, calibrating sequence has the advantages that signal power is strong, and its antijamming capability is stronger.
S502: according to the judged result in step 501, select antenna calibration time slot position, in the time judging described UpPTS slot offset to other ascending time slots, adjusting antenna calibration time slot position is Pos2, is Pos1 otherwise retain antenna calibration time slot position.
Specifically, shown in Fig. 4, utilize UpPTS to be displaced to other ascending time slots, the method for Dynamic Selection antenna calibration time slot comprises the steps:
In the time that UpPTS time slot has user to access, UpPTS is displaced to other ascending time slots.In the present embodiment, UpPTS time slot can be displaced to TS1.By antenna calibration sequence offset, to Pos2, adjusting antenna calibration time slot position is Pos2.Wherein, the slot length of antenna calibration time slot is 35chip.
In the time that UpPTS is not displaced to other ascending time slots, still send calibrating sequence at Pos1, complete antenna calibration.
Preferably, do not affect system and normally work in order to realize antenna calibration, according to order of the present invention, antenna calibration sequence is adjusted to other fixing time slot positions, also belongs to protection scope of the present invention.
S503: according to selecting to obtain antenna calibration time slot position, send calibrating sequence, carry out antenna calibration.
According to obtaining antenna calibration time slot position in step 502, send calibrating sequence in this position, complete antenna calibration.Wherein, antenna calibration is periodic calibration mode, comprises transmitting calibration and receives calibration.
The method providing according to the embodiment of the present invention, by dynamic adjustment antenna calibration time slot position, has improved antenna calibration precision, prevents the frequent alarm of antenna calibration, has solved the problem that intelligent antenna calibration is disturbed.
Corresponding to the method for dynamically adjusting antenna calibration time slot in the embodiment of the present invention by measurements interference power, the embodiment of the invention also discloses the device that a kind of antenna calibration position is dynamically adjusted, shown in Fig. 6, this device 600 comprises measurement module 610, selects module 620 and calibration module 630.
Wherein, measurement module 610, for the signal e receiving according to initial antenna calibration time slot position Pos1 ac, the interference power intensity P of measurement initial antenna calibration time slot position Pos1 inter.
Specifically, establish initial antenna calibration time slot position Pos1 and receive signal e ac, measurement module 610 is according to the interference power intensity P at this signal measurement Pos1 place inter.Wherein, interference power P intercomputational methods be:
P inter = 1 35 . K a &Sigma; k a = 0 K a - 1 &Sigma; i = 0 34 e ac ( ka , i ) ( e ac ( ka , i ) ) H ,
In above formula, ka is antenna sequence number, and Ka is antenna sum, and H is conjugate transpose computing, and i is reception data sequence number, i=0 ... 34.
Select module 620, for by interference power intensity P obtained above interwith calibrating sequence maximum transmit power P maxcompare, select antenna calibration time slot position according to comparative result.
According to the interference power intensity P being measured by measurement module 610 inter, select antenna calibration time slot position.Shown in Fig. 4, establishing calibrating sequence maximum transmit power is P max, calibration network decay XdB, thresholding Threshold is selected in position,
As 10log10 (P max)-10log10 (P interwhen)-X>=Threshold, retain initial antenna calibration time slot position Pos1, send calibrating sequence at Pos1;
As 10log10 (P max)-10log10 (P inter)-X < Threshold, selecting module 620 to adjust antenna calibration time slot position is Pos2, sends calibrating sequence at Pos2.
Wherein, the slot length of antenna calibration time slot is 35chip.
In the present embodiment, position selects thresholding Threshold to determine by the method for emulation and test.X is relevant to coupler and the feeder line length etc. of calibration network in calibration network decay.
Obtain antenna calibration time slot position according to above-mentioned selection module 620, send calibrating sequence by calibration module 630, carry out antenna calibration.Wherein, antenna calibration is periodic calibration mode, comprises transmitting calibration and receives calibration.
The device providing according to the embodiment of the present invention, by dynamic adjustment antenna calibration time slot position, has improved antenna calibration precision, prevents the frequent alarm of antenna calibration, has solved the problem that intelligent antenna calibration is disturbed.
In addition, antenna calibration generally adopts the mode of period regulation, if in the time of antenna calibration, UpPTS time slot has user's access, can affect user's access.In order not affect user's access, the embodiment of the present invention also proposes by judging that UpPTS is displaced to other ascending time slots, dynamically adjusts the device of antenna calibration time slot.Shown in Fig. 6, this device 600 comprises measurement module 610, selects module 620 and calibration module 630.
Wherein, measurement module 610 is for judging according to the signal receiving whether uplink pilot time slot UpPTS time slot is displaced to other ascending time slots.
Due to the existence of inter base station interference, in TD-SCDMA system, introduced at present UpPTSShifting mechanism, that is, in the time that interference effect arrives the detection of UpPTS time slot, UpPTS slot offset is arrived to other ascending time slots, for example TS1 time slot.
Specifically, in the time of P >=Threshold_UpPTS, wherein P is the interference between base station, Threshold_UpPTS is the threshold value that UpPTS time slot detects, when skew has occurred UpPTS time slot, system can be notified the on-position of UpPTS to system equipment, and measurement module 610 judges that uplink pilot time slot UpPTS slot offset is to other ascending time slots.
UpPTS time slot detect uplink synchronous code send to base station side by terminal, due to the existence of spatial loss, the signal that base station receives is lower, generally-below 80dBm.But calibrating signal be by calibration network directly by antenna reception, not Existential Space propagation loss.Therefore with respect to uplink synchronous code, calibrating sequence has the advantages that signal power is strong, and its antijamming capability is stronger.
Select module 620 according to the judged result from measurement module 610, select antenna calibration time slot position, in the time judging described UpPTS slot offset to other ascending time slots, adjusting antenna calibration time slot position is Pos2, is Pos1 otherwise retain antenna calibration time slot position.
Specifically, shown in Fig. 4, select module 620 to utilize UpPTS to be displaced to other ascending time slots, the method for Dynamic Selection antenna calibration time slot comprises:
In the time that UpPTS time slot has user to access, UpPTS is displaced to other ascending time slots.In the present embodiment, UpPTS time slot can be displaced to TS1.By antenna calibration sequence offset, to Pos2, selecting module 620 to adjust antenna calibration time slot position is Pos2.Wherein, the slot length of antenna calibration time slot is 35chip.
In the time that UpPTS is not displaced to other ascending time slots, still send calibrating sequence at Pos1, complete antenna calibration.
Preferably, do not affect system and normally work in order to realize antenna calibration, according to order of the present invention, antenna calibration sequence is adjusted to other fixing time slot positions, also belongs to protection scope of the present invention.
Obtain antenna calibration time slot position according to above-mentioned selection module 620, send calibrating sequence by calibration module 630, carry out antenna calibration.Wherein, antenna calibration is periodic calibration mode, comprises transmitting calibration and receives calibration.
The device providing according to the embodiment of the present invention, by dynamic adjustment antenna calibration time slot position, has improved antenna calibration precision, prevents the frequent alarm of antenna calibration, has solved the problem that intelligent antenna calibration is disturbed.
One of ordinary skill in the art will appreciate that realizing all or part of step that above-described embodiment method carries is can carry out the hardware that instruction is relevant by program to complete, described program can be stored in a kind of computer-readable recording medium, this program, in the time carrying out, comprises step of embodiment of the method one or a combination set of.
In addition, the each functional unit in each embodiment of the present invention can be integrated in a processing module, can be also that the independent physics of unit exists, and also can be integrated in a module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.If described integrated module realizes and during as production marketing independently or use, also can be stored in a computer read/write memory medium using the form of software function module.
The above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (4)

1. the method that antenna calibration position is dynamically adjusted, is characterized in that, the method comprises the following steps:
The signal e receiving according to initial antenna calibration time slot position Pos1 ac, measure the interference power intensity P of described initial antenna calibration time slot position Pos1 inter;
By described interference power intensity P interwith calibrating sequence maximum transmit power P maxcompare, select antenna calibration time slot position according to comparative result;
Obtain antenna calibration time slot position according to described selection, send calibrating sequence, carry out antenna calibration;
Wherein, described interference power intensity P intercomputational methods:
P inter = 1 35 . K a &Sigma; K 0 = 0 K a - 1 &Sigma; i = 0 34 e ac ( ka , i ) ( e ac ( ka , i ) ) H
In above formula, ka is antenna sequence number, and Ka is antenna sum, and H is conjugate transpose computing, and i is reception data sequence number, i=0 ... 34;
Wherein, by described interference power intensity P interwith calibrating sequence maximum transmit power P maxcompare, select antenna calibration time slot position according to comparative result, specifically comprise,
As 10log10 (P max)-10log10 (P interwhen)-X>=Threshold, retain initial antenna calibration time slot position Pos1, send calibrating sequence at Pos1;
As 10log10 (P max)-10log10 (P inter)-X < Threshold, adjusting antenna calibration time slot position is Pos2, sends calibrating sequence at Pos2;
Wherein, calibration network decay XdB, Threshold is that thresholding is selected in position, the slot length of antenna calibration time slot is 35chip.
2. the method for claim 1, is characterized in that, described antenna calibration is periodic calibration mode.
3. the device that antenna calibration position is dynamically adjusted, is characterized in that, this device comprises measurement module, selects module and calibration module,
Described measurement module, for the signal e receiving according to initial antenna calibration time slot position Pos1 ac, measure the interference power intensity P of described initial antenna calibration time slot position Pos1 inter;
Described selection module, for by described interference power intensity P interwith calibrating sequence maximum transmit power P maxcompare, select antenna calibration time slot position according to comparative result;
Described calibration module, for obtaining antenna calibration time slot position according to described selection, sends calibrating sequence, carries out antenna calibration;
Wherein, described interference power intensity P intercomputational methods:
P inter = 1 35 . K a &Sigma; K 0 = 0 K a - 1 &Sigma; i = 0 34 e ac ( ka , i ) ( e ac ( ka , i ) ) H
In above formula, ka is antenna sequence number, and Ka is antenna sum, and H is conjugate transpose computing, and i is reception data sequence number, i=0 ... 34;
Wherein, by described interference power intensity P interwith calibrating sequence maximum transmit power P maxcompare, select antenna calibration time slot position according to comparative result, specifically comprise,
As 10log10 (P max)-10log10 (P interwhen)-X>=Threshold, retain initial antenna calibration time slot position Pos1, send calibrating sequence at Pos1;
As 10log10 (P max)-10log10 (P inter)-X < Threshold, adjusting antenna calibration time slot position is Pos2, sends calibrating sequence at Pos2;
Wherein, calibration network decay XdB, Threshold is that thresholding is selected in position, the slot length of antenna calibration time slot is 35chip.
4. device as claimed in claim 3, is characterized in that, it is periodic calibration mode that described calibration module carries out antenna calibration.
CN201010177484.9A 2010-05-14 2010-05-14 Method and device for dynamically regulating antenna calibration position Active CN102244531B (en)

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CN201310521839.5A CN103546205B (en) 2010-05-14 2010-05-14 A kind of method of antenna calibration position dynamic conditioning and device

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