CN201830460U - Base station calibrating device and base station - Google Patents
Base station calibrating device and base station Download PDFInfo
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- CN201830460U CN201830460U CN2010205187331U CN201020518733U CN201830460U CN 201830460 U CN201830460 U CN 201830460U CN 2010205187331 U CN2010205187331 U CN 2010205187331U CN 201020518733 U CN201020518733 U CN 201020518733U CN 201830460 U CN201830460 U CN 201830460U
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- base station
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Abstract
The embodiment of the utility model discloses a base station calibrating device and a base station. The base station calibrating device comprises a storage unit for storing the compensation data of all receiving-transmitting passages and feeder lines of the base station, and a baseband processing unit which is connected with the storage unit, reads the compensation data from the storage unit and calibrates the characteristic parameters of the receiving-transmitting passages and the feeder lines by using the compensation data. By the embodiment, the phases and the amplitude characteristic errors of a plurality of receiving-transmitting passages and feeder lines are compensated accurately under the condition that complex circuits such as calibrating networks, calibrating receiving-transmitting passages and the like are not introduced necessarily.
Description
Technical field
The utility model relates to communication technical field, relates in particular to a kind of base station calibration device and base station.
Background technology
Development along with communication network, intelligent antenna technology has become one of technology the most attractive in the mobile communication, be applied to (Time Division Synchronous Code Division Multiple Access such as TD-SCDMA, TD SDMA), TD-LTE (Time Division Long Term Evolution, the time-division Long Term Evolution) etc. in TDD (Time Division Duplex, time division duplex) the standard type mobile communication system.The core of intelligent antenna technology comprises the downlink traffic channel figuration, and its operation principle is: terminal sends reference signal to the base station, and the base station receives also and estimates the up channel matrix behind the demodulated reference signal; SVD (Singular Value Decomposition, singular value decomposition) processing is carried out to the up channel matrix in the base station, draws weighing vector; Based on up-downgoing channel heterogeneite, the base station adopts the weighing vector of up channel matrix that downlink traffic channel is carried out figuration; Downlink traffic channel data behind the figuration are passed through emission path, feeder line and antenna successively, and are launched by antenna.
As shown in Figure 1, architecture of base station schematic diagram for employing intelligent antenna technology of the prior art, baseband processing unit (C plane) is finished the figuration of downlink traffic channel data and is handled, and by the downlink traffic channel data behind bay (A plane) the emission figuration.For obtaining good figuration effect, the phase place and the amplitude characteristic of the many covers Transmit-Receive Unit between A plane and the C plane (comprise the emission path, receive path, feeder line, bay) will be consistent.Yet because the influence that device difference, external environment condition (as temperature, humidity) and the operating frequency of each Transmit-Receive Unit etc. change, there are significant difference in the phase place and the amplitude characteristic that overlap between Transmit-Receive Unit more, can't satisfy the requirement of Traffic Channel figuration.Therefore,, need calibrate, that is, emission path, reception path, feeder line and bay be calibrated many covers Transmit-Receive Unit in order to obtain desirable figuration effect.
Because the calibration of bay is generally carried out before antenna product is dispatched from the factory, therefore, the base station only needs transmitting-receiving path and feeder line are calibrated in running.For transmitting-receiving path and feeder line are calibrated, existing base station calibration scheme need be introduced passive calibration network at antenna inside (or inside of base station), and introduces calibration transmitting-receiving path (comprising that calibration receives path and calibration emission path) at inside of base station and come assisted calibration.As shown in Figure 2, for calibration network of the prior art is positioned at the antenna structure view of antenna inside, wherein, calibration network is made of microstrip directional coupler and power division/synthesizer.Be assisted calibration, also additionally introduce a calibration port in calibration network, this calibration port links to each other with calibration transmitting-receiving path.The calibration receive path can be by calibration network from a plurality of bay coupling received signals; The signal of calibration transmission channel emission also can pass through calibration network, passes to the reception path of a plurality of bays.
Based on above-mentioned calibration network, existing base station calibration scheme can comprise transmitting calibration and receive calibration.Wherein, the transmitting calibration scheme comprises: each transmitter unit in the base station sends the calibrating sequence of mutually orthogonal, and this calibrating sequence enters the calibration receive path through calibration network; Behind the calibration receive path demodulation calibrating sequence, calibrating sequence is issued baseband processing unit; Baseband processing unit receives calibrating sequence, and utilize the orthogonality of calibrating sequence, estimate phase place, the amplitude difference of each bay corresponding emission path and cable, and phase place and the range error between many groups of emission paths and cable compensated according to phase place, amplitude difference.
The reception calibration program comprises: calibration emission path sends calibrating sequence, and this calibrating sequence enters the receive path of each bay correspondence by calibration network; Each receive path receives calibrating sequence, and calibrating sequence is issued baseband processing unit; Baseband signal processing unit is estimated corresponding phase place and the amplitude difference that receives path of each bay, and according to phase place and amplitude difference phase place between many group of received path and cable and range error is compensated.
In the process of base station operation, comparatively obvious variation takes place in phase place and amplitude characteristic that variation of ambient temperature and device aging can cause receiving and dispatching path.Therefore, for obtaining sufficiently high base station calibration precision, existing base station calibration scheme can be carried out a transmitting calibration at set intervals and receive calibration.
The inventor finds that there is following defective at least in prior art in realizing process of the present utility model:
Existing base station calibration scheme need be introduced passive calibration network and calibration transmitting-receiving path at inside of base station, and carries out a transmitting calibration at set intervals and receive calibration.Therefore, existing base station calibration scheme realizes complicated, and realizes the cost height.
The utility model content
The utility model embodiment provides a kind of base station calibration device and base station, under the situation that need not to introduce complicated circuit such as calibration network and calibration transmitting-receiving path, the phase place and the amplitude characteristic error of multichannel transmitting-receiving path and feeder line is compensated accurately.
The utility model embodiment provides a kind of base station calibration device, comprising:
Memory cell is used to store each the road transmitting-receiving path of base station and the offset data of feeder line;
Baseband processing unit is connected with described memory cell, reads offset data from described memory cell, and uses described offset data that the characterisitic parameter of transmitting-receiving path and feeder line is calibrated.
Preferably, described device also comprises:
Temperature sensor is received and dispatched path with each road in the base station and is connected with feeder line, measures described each road transmitting-receiving path and the residing ambient temperature of feeder line;
Described memory cell, storage in the base station each road transmitting-receiving path and feeder line under each ambient temperature or the offset data in the ambient temperature range;
Described baseband processing unit is connected with described temperature sensor, reads the ambient temperature that described temperature sensor measurement obtains, and reads the corresponding compensation data according to described ambient temperature from described memory cell.
Preferably, described baseband processing unit, be connected with feeder line with each the road transmitting-receiving path in the described base station, obtain the characterisitic parameter of described each road transmitting-receiving path and feeder line, select wherein one the tunnel to receive and dispatch the characterisitic parameter of path and feeder line as the characteristic reference data, calculate the offset data that paths and feeder line correspondence are received and dispatched in other each roads according to described characteristic reference data, and store described offset data into described memory cell.
Preferably, the residing ambient temperature range in described base station comprises a plurality of sub-temperature ranges;
Described baseband processing unit, obtain described each road transmitting-receiving path and feeder line characterisitic parameter in each sub-temperature range, select wherein one the tunnel to receive and dispatch the characterisitic parameter of path and feeder line as the characteristic reference data, calculate other each roads transmitting-receiving paths and feeder line offset data according to described characteristic reference data, and store described offset data into described memory cell in each sub-temperature range correspondence.
The utility model embodiment also provides a kind of base station, comprises many array-element antenna, and multichannel transmitting-receiving path and feeder line, also comprises above-mentioned base station calibration device.
Compared with prior art, the utility model embodiment has the following advantages: the utility model embodiment can make the phase place and the amplitude characteristic error of multichannel transmitting-receiving path and feeder line be compensated accurately, obtain sufficiently high base station calibration precision, and need not to introduce complicated circuit such as calibration network and calibration transmitting-receiving path.Owing to directly read existing offset data during compensation for calibrating errors, avoided the estimation process of transmitting-receiving path and feeder line phase/amplitude characteristic, reduced the complexity of calibration computing.
Description of drawings
Fig. 1 is the architecture of base station schematic diagram of employing intelligent antenna technology of the prior art;
Fig. 2 is positioned at the antenna structure view of antenna inside for calibration network of the prior art;
Fig. 3 is the structural representation of the base station that comprises the base station calibration device among the utility model embodiment;
Fig. 4 carries out the flow chart of base station calibration for the base station calibration device among the utility model embodiment.
Embodiment
In the technical scheme that the utility model embodiment provides, base station equipment does not comprise calibration network and calibration transmitting-receiving path, but has introduced the memory cell that is used to store offset data.When carrying out base station calibration, the baseband processing unit in the base station equipment can read offset data from memory cell, and uses this offset data pair transmitting-receiving path corresponding with this offset data and the characterisitic parameter of feeder line to calibrate.Wherein, the transmitting-receiving path can comprise the emission path or receive path.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme of the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
In order to reduce the complexity of base station calibration scheme, before base station equipment is dispatched from the factory, can measure phase place and amplitude characteristic data that path and feeder line are received and dispatched in each road in the base station equipment, and with the phase place of wherein a road transmitting-receiving path and feeder line and amplitude characteristic data as the characteristic reference data, calculate other each road transmitting-receiving path and the phase place of feeder line and difference datas between amplitude characteristic data and this characteristic reference data, and obtain the offset data of each road transmitting-receiving path and feeder line correspondence according to this difference data, this offset data is deposited in the memory cell.After base station equipment powers on, can from memory cell, read and each road transmitting-receiving path and the corresponding offset data of feeder line, in baseband processing unit, use this offset data that the phase place and the amplitude characteristic difference of each road transmitting-receiving path and feeder line are compensated, the phase place that makes each road transmitting-receiving path and feeder line and amplitude characteristic be with consistent with reference to the phase place and the amplitude characteristic of corresponding transmitting-receiving path of performance data and feeder line, thereby finish the base station calibration process.
Consider in the running of base station equipment that the phase place and the amplitude characteristic of transmitting-receiving path and feeder line can produce comparatively obvious variation with the variation of ambient temperature.For improving calibration accuracy, can measure multichannel transmitting-receiving path and phase place and the amplitude characteristic data of feeder line in a plurality of temperature ranges respectively, and generate offset data corresponding to a plurality of temperature ranges.When carrying out base station calibration, can receive and dispatch path and the residing ambient temperature of feeder line in each road of serviceability temperature sensor measurement, and then know each road transmitting-receiving path and the residing temperature range of feeder line, and adopt the phase place and the amplitude characteristic difference of multichannel being received and dispatched path and feeder line to compensate, thereby finish the base station calibration process corresponding to the offset data of this temperature range.
As shown in Figure 3, the structural representation for the base station that comprises the base station calibration device among the utility model embodiment comprises:
Many array-element antenna 310 comprise many bays, are used to transmit and receive radiofrequency signal.The inner no calibration network of these many array-element antenna.
Feeder 320 comprises many feeder lines, and every feeder line is responsible for a bay and one tunnel radio signal transmission of receiving and dispatching between path.
Transmit Receive Unit 330 comprises a plurality of transmitting-receiving paths, and the transmitting-receiving path comprises the emission path and receives path.Wherein, the emission path is responsible for baseband signal is converted into powerful radiofrequency signal, and the radiofrequency signal that the reception path is responsible for receiving is converted into baseband signal.
Base station calibration device in the base station comprises:
Memory cell 340 is used to store offset data, and each road transmitting-receiving path and feeder line in this offset data and the base station are corresponding.
Baseband processing unit 350 is connected with memory cell 340, reads offset data from memory cell 340, and uses this offset data pair transmitting-receiving path corresponding with this offset data and the characterisitic parameter of feeder line to calibrate.
Above-mentioned base station calibration device can further include:
Temperature sensor 360 is used to measure the residing ambient temperature in base station.
Particularly, temperature sensor 360 is received and dispatched path with each road in the base station and is connected with feeder line, can measure each road transmitting-receiving path and the residing ambient temperature of feeder line in the base station.
Correspondingly, said memory cells 340, storage in the base station each road transmitting-receiving path and feeder line under each ambient temperature or the offset data in the ambient temperature range; Above-mentioned baseband processing unit 350, be connected with temperature sensor 360, the ambient temperature that reading temperature sensor 360 measures reads the corresponding compensation data according to this ambient temperature from memory cell 340, and uses this offset data that the characterisitic parameter of transmitting-receiving path and feeder line is calibrated.
Above-mentioned baseband processing unit 350, can also be connected with feeder line with each the road transmitting-receiving path in the base station, obtain the characterisitic parameter of each road transmitting-receiving path and feeder line, select wherein one the tunnel to receive and dispatch the characterisitic parameter of path and feeder line as the characteristic reference data, calculate the offset data that paths and feeder line correspondence are received and dispatched in other each roads according to this characteristic reference data, and store this offset data into memory cell 340.
Wherein, the residing ambient temperature range in base station can comprise a plurality of sub-temperature ranges.Correspondingly, above-mentioned baseband processing unit 350, can obtain each road transmitting-receiving path and feeder line characterisitic parameter in each sub-temperature range, select wherein one the tunnel to receive and dispatch the characterisitic parameter of path and feeder line as the characteristic reference data, calculate other each roads transmitting-receiving paths and feeder line offset data according to this characteristic reference data, and store this offset data into memory cell 340 in each sub-temperature range correspondence.
According to the phase place of present test instrumentation and the certainty of measurement of amplitude characteristic, use the device in the utility model, the phase place and the amplitude characteristic error of multichannel transmitting-receiving path and feeder line are compensated accurately, obtain sufficiently high base station calibration precision, and need not to introduce complicated circuit such as calibration network and calibration transmitting-receiving path.In addition, directly read existing offset data during owing to compensation for calibrating errors, avoided the estimation process of transmitting-receiving path and feeder line phase/amplitude characteristic, reduced the complexity of calibration computing.
The base station calibration device that provides in the above-mentioned execution mode carries out the flow process of base station calibration, can may further comprise the steps as shown in Figure 4:
For example, when the residing ambient temperature range of base station equipment is C, this ambient temperature range can be divided into a plurality of sub-temperature range C1, C2...Cn, wherein, C=C1+C2+...+Cn.
Particularly, can select the phase place of a tunnel transmitting-receiving path and feeder line and amplitude characteristic data as the characteristic reference data arbitrarily, also can receive and dispatch the transmitting-receiving path and the feeder line of the performance parameter selectivity characteristic reference data correspondence of path and feeder line according to each road, for example, select phase place and amplitude characteristic data transmitting-receiving path and feeder line conduct transmitting-receiving path and the feeder line corresponding with the characteristic reference data greater than default thresholding.
Wherein, offset data can be identical with difference data, also can be the opposite number of difference data.In memory cell, the corresponding relation of offset data and sub-temperature range and transmitting-receiving path and feeder line, as shown in table 1.
The mapping table of table 1 offset data and sub-temperature range and transmitting-receiving path and feeder line
| S1 | S2 | ... | ?Sm | |
| C1 | Offset data 11 | Offset data 12 | ... | Offset data 1m |
| C2 | Offset data 21 | Offset data 22 | ... | Offset data 2m |
| ... | ... | ... | ... | ?... |
| Cn | Offset data n1 | Offset data n2 | ... | Offset data nm |
Wherein, C1, C2...Cn are the numbering of sub-temperature range, S1, and S2...Sm is the numbering of transmitting-receiving path and feeder line, each group (Cn, Sm) corresponding related offset data.
When needs carry out base station calibration, carry out following process:
Ambient temperature that step 406, baseband processing unit obtain temperature sensor measurement and the temperature range data in the memory cell compare, and obtain the sub-temperature range of each road transmitting-receiving path and the residing ambient temperature correspondence of feeder line.
Need to prove that above-mentioned execution mode is the flow process of single base station calibration.In other embodiments, can also realize repeatedly calibration, improve the precision of base station calibration every Preset Time execution in step 405 to step 407 to the base station.
Because the transmitting-receiving path and the feeder line characteristic of different base station equipment are distinguished to some extent, the offset data of different base station correspondence also is different, therefore, when carrying out base station calibration, need be at each base station equipment execution in step 401 to step 404, to obtain phase place and amplitude characteristic compensation of error data at transmitting-receiving path in each base station equipment and feeder line.Before each base station equipment operation, offset data and each corresponding sub-temperature range of this base station need be stored in the memory cell, make between base station and the offset data corresponding one by one.
According to the phase place of present test instrumentation and the certainty of measurement of amplitude characteristic, said method can make the phase place and the amplitude characteristic error of multichannel transmitting-receiving path and feeder line be compensated accurately, obtain sufficiently high base station calibration precision, and need not to introduce complicated circuit such as calibration network and calibration transmitting-receiving path.In addition, directly read existing offset data during owing to compensation for calibrating errors, avoided the estimation process of transmitting-receiving path and feeder line phase/amplitude characteristic, reduced the complexity of calibration computing.
Through the above description of the embodiments, those skilled in the art can be well understood to the utility model and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that the technical scheme of the utility model embodiment contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a station terminal equipment (can be mobile phone, personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the utility model.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model embodiment principle; can also make some improvements and modifications, these improvements and modifications also should be looked protection range of the present utility model.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be integrated in one, and also can separate deployment; A module can be merged into, also a plurality of submodules can be further split into.
Above-mentioned the utility model embodiment sequence number is not represented the quality of embodiment just to description.
More than disclosed only be several specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection range of the present utility model.
Claims (5)
1. a base station calibration device is characterized in that, comprising:
Memory cell is used to store each the road transmitting-receiving path of base station and the offset data of feeder line;
Baseband processing unit is connected with described memory cell, reads offset data from described memory cell, and uses described offset data that the characterisitic parameter of transmitting-receiving path and feeder line is calibrated.
2. device as claimed in claim 1 is characterized in that, also comprises:
Temperature sensor is received and dispatched path with each road in the base station and is connected with feeder line, measures described each road transmitting-receiving path and the residing ambient temperature of feeder line;
Described memory cell, storage in the base station each road transmitting-receiving path and feeder line under each ambient temperature or the offset data in the ambient temperature range;
Described baseband processing unit is connected with described temperature sensor, reads the ambient temperature that described temperature sensor measurement obtains, and reads the corresponding compensation data according to described ambient temperature from described memory cell.
3. device as claimed in claim 1 is characterized in that,
Described baseband processing unit, be connected with feeder line with each the road transmitting-receiving path in the described base station, obtain the characterisitic parameter of described each road transmitting-receiving path and feeder line, select wherein one the tunnel to receive and dispatch the characterisitic parameter of path and feeder line as the characteristic reference data, calculate the offset data that paths and feeder line correspondence are received and dispatched in other each roads according to described characteristic reference data, and store described offset data into described memory cell.
4. device as claimed in claim 3 is characterized in that, the residing ambient temperature range in described base station comprises a plurality of sub-temperature ranges;
Described baseband processing unit, obtain described each road transmitting-receiving path and feeder line characterisitic parameter in each sub-temperature range, select wherein one the tunnel to receive and dispatch the characterisitic parameter of path and feeder line as the characteristic reference data, calculate other each roads transmitting-receiving paths and feeder line offset data according to described characteristic reference data, and store described offset data into described memory cell in each sub-temperature range correspondence.
5. a base station comprises many array-element antenna, and multichannel transmitting-receiving path and feeder line, it is characterized in that, also comprises as each described base station calibration device of claim 1 to 4.
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|---|---|---|---|
| CN2010205187331U CN201830460U (en) | 2010-09-03 | 2010-09-03 | Base station calibrating device and base station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205187331U CN201830460U (en) | 2010-09-03 | 2010-09-03 | Base station calibrating device and base station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651672A (en) * | 2011-02-25 | 2012-08-29 | 中国移动通信集团公司 | Base station calibration method and device for cooperative multiple input multiple output (MIMO) system |
| CN107426743A (en) * | 2016-05-23 | 2017-12-01 | 中兴通讯股份有限公司 | A kind of base station calibration method, apparatus, base station and communication system |
-
2010
- 2010-09-03 CN CN2010205187331U patent/CN201830460U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651672A (en) * | 2011-02-25 | 2012-08-29 | 中国移动通信集团公司 | Base station calibration method and device for cooperative multiple input multiple output (MIMO) system |
| CN102651672B (en) * | 2011-02-25 | 2015-02-04 | 中国移动通信集团公司 | Base station calibration method and device for cooperative multiple input multiple output (MIMO) system |
| CN107426743A (en) * | 2016-05-23 | 2017-12-01 | 中兴通讯股份有限公司 | A kind of base station calibration method, apparatus, base station and communication system |
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Granted publication date: 20110511 |