CN103117786A - Antenna array calibration method and system - Google Patents
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- CN103117786A CN103117786A CN 201310019901 CN201310019901A CN103117786A CN 103117786 A CN103117786 A CN 103117786A CN 201310019901 CN201310019901 CN 201310019901 CN 201310019901 A CN201310019901 A CN 201310019901A CN 103117786 A CN103117786 A CN 103117786A
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Abstract
The invention discloses an antenna array calibration method and a system. The problem of data distortion in background technology can be solved. The antenna array calibration method comprises the steps of receiving calibration information from a digital signal processor (DSP) in a radio frame, wherein the calibration information comprises an average power value of a calibration sequence, a known symbolic number where the calibration sequence lies and known calibration enable signals; calculating and obtaining the average power value of the calibration sequence by the DSP according to all data of the known calibration sequence; searching a calibration sequence in a second radio frame according to the symbolic number where the known calibration sequence lies and the known calibration enable signals and comparing the received average power value of the calibration sequence of the searched calibration sequence with known target gain; and regulating the gain according to the comparative result and completing antenna array calibration. The antenna array calibration method and the system improve the precision of the average power value of the calibration sequence, and avoid the condition of data distortion and the influence on the calibration sequence after a compression algorithm is introduced.
Description
Technical field
The embodiment of the present invention relates to communication technical field, particularly relates to a kind of antenna array calibration method and system.
Background technology
Existing antenna array calibration method; at down direction; by Digital Signal Processing (Digital Signal Processing; DSP) unit inserts downgoing baseband data protection time slot (Protect Period with calibrating sequence; GP) position; issue again the field programmable gate array (Field-Programmable Gate Array, FPGA) of Base Band Unit equipment (Base band Unit, BBU).At up direction, Remote Radio Unit (Radio Remote Unit, RRU) closes the road with calibrating signal and working signal, then gives RRU-FPGA by switching over.Therefore, for BBU-FPGA and RRU-FPGA, working signal and calibrating signal are mixed is one the tunnel, all according to identical flow processing.And the loopback of calibrating sequence respectively carries out once complete compression process through whole uplink and downlink link.
When carrying out data compression, at down direction, calibrating sequence is placed in the symbol of GP, can compresses normally, decompress(ion).But at up direction, because up terminal signaling is that in advance 20us delivers to antenna opening, so the reference frame head of up link shifts to an earlier date descending 20us, and the time point of dividing symbol is 20us in advance also.Fig. 1 is the sequential chart of calibrating sequence, and the part of drawing oblique line represents calibration data.Calibration data be looped back to up after, be assigned in 2 symbols.Wherein account for rear 1578 Ts(sampled points in symbol (n+1)), symbol (n+2) accounts for front 502 Ts.For symbol (n+1), because present front 614 sampled points are all to make an uproar at the end, the average gain that therefore calculates is very low, and the data of whole symbol need to produce by shifting left larger gain.When the power of actual alignment sequence and low noise differed greatly, data were shifted left and will be overflowed, and cause expendable distortion.The calibration data of symbol (n+2) also can be affected, just because invalid data in front 1/4 symbol lacks relatively, so the actual power difference of the average power that calculates and calibrating sequence is little.
Move the position of descending slotting calibrating sequence on DSP, it is shifted to an earlier date 20us, can avoid up automatic gain to control the situation that (Automatic Gain Control, AGC) processes distortion, but the AGC in descending compression processing can make mistakes again.As shown in Figure 2.
In sum, existing antenna array calibration method is algorithm affects by compression, descending reference frame head and uply differ 20us with reference to frame head, and DSP can only insert calibrating sequence as reference time with the frame head of one of them direction, so just cause calibrating sequence not mate with the frame head of other direction, the accuracy of the average power content of the calibrating sequence that calculates is not high, regulates afterwards making data the situation of distortion occur through AGC.
Summary of the invention
The embodiment of the present invention discloses a kind of antenna array calibration method and system, to solve the problem of data distortion in background technology.
In order to address the above problem, the embodiment of the invention discloses a kind of antenna array calibration method, comprising:
Receive calibration information from digital signal processing unit in the first radio frames, wherein, described calibration information comprises: the symbolic number at the average power content of calibrating sequence, known described calibrating sequence place and known calibration enable signal; The average power content of described calibrating sequence is calculated by the total data of digital signal processing unit according to known described calibrating sequence;
According to the symbolic number at known described calibrating sequence place and known described calibration enable signal, at the second radio frames search calibrating sequence, and the calibrating sequence that searches is adopted the described calibrating sequence average power content that receives, compare with known target gain;
Carry out gain-adjusted according to comparative result, complete antenna array calibration.
Preferably, described the first radio frames is connected with described the second radio frames, and described the first radio frames is before described the second radio frames.
Preferably, also comprise: in the second radio frames is inserted into normal data with known described calibrating sequence.
Preferably, described in the second radio frames is inserted into normal data with known described calibrating sequence, comprising:
In the second radio frames is inserted into two adjacent symbols with known described calibrating sequence;
Wherein, when protecting time slot greater than a symbol, described calibrating sequence is inserted into 2 adjacent symbols of protection time slot, and when the protection time slot equaled a symbol, described calibrating sequence was inserted into last 1 symbol of descending pilot frequency time slot and 1 symbol of protection time slot.
Preferably, describedly carry out gain-adjusted according to comparative result, comprising:
The amplitude that the average power content calculated gains of the described calibrating sequence of foundation is regulated;
During greater than target gain, reduce the amplitude of total data when the average power content of described calibrating sequence;
During less than target gain, increase the amplitude of total data when the average power content of described calibrating sequence.
The embodiment of the invention also discloses a kind of antenna array calibration system, comprising:
Digital signal processing unit is for calculate the average power content of described calibrating sequence according to the total data of known calibrating sequence;
The BBU-FPGA unit, be used at the calibration information of the first radio frames reception from described digital signal processing unit, wherein, described calibration information comprises: the symbolic number at the average power content of described calibrating sequence, known described calibrating sequence place and known calibration enable signal; According to the symbolic number at known described calibrating sequence place and known described calibration enable signal, at the second radio frames search calibrating sequence, and the calibrating sequence that searches is adopted the described calibrating sequence average power content that receives, compare with known target gain; Carry out gain-adjusted according to comparative result, complete antenna array calibration.
Preferably, described the first radio frames is connected with described the second radio frames, and described the first radio frames is before described the second radio frames.
Preferably, described digital signal processing unit also is used in the second radio frames, known described calibrating sequence being inserted into normal data.
Preferably, described digital signal processing unit is in the second radio frames is inserted into two adjacent symbols with known described calibrating sequence;
Wherein, when protecting time slot greater than a symbol; described digital signal processing unit is inserted into 2 adjacent symbols of protection time slot with described calibrating sequence; when the protection time slot equaled a symbol, described digital signal processing unit was inserted into last 1 symbol of descending pilot frequency time slot and 1 symbol of protection time slot with described calibrating sequence.
Preferably, the amplitude of the average power content calculated gains adjusting of the described calibrating sequence of described BBU-FPGA unit foundation;
During greater than target gain, described BBU-FPGA reduces the unit amplitude of total data when the average power content of described calibrating sequence;
When the average power content of described calibrating sequence during less than target gain, described BBU-FPGA unit increases the amplitude of total data.
Compare with background technology, the embodiment of the present invention comprises following advantage:
At first, utilize the total data of calibrating sequence to calculate the average power content of calibrating sequence, compare with only getting the average power content that the partial data in calibrating sequence calculates in background technology, improved the precision of calibrating sequence average power content.
Secondly, average power content and the target gain of the calibrating sequence that improves according to precision compare, and the comparative result that obtains is also correspondingly more accurate.
Again, carry out gain-adjusted according to comparative result more accurately, avoided the distortion situation of data.
Further, with easy method, avoided after the introducing compression algorithm, calibrating sequence being impacted.
Description of drawings
Fig. 1 is the calibrating sequence sequential schematic diagram in background technology;
Fig. 2 is the calibrating sequence sequential schematic diagram in background technology;
Fig. 3 is sending alignment structural representation in the specific embodiment of the invention;
Fig. 4 is close alignment structural representation in the specific embodiment of the invention;
Fig. 5 is the structural principle schematic diagram of IR interface data compression in the specific embodiment of the invention;
Fig. 6 is a kind of antenna array calibration method flow diagram in the embodiment of the present invention;
Fig. 7 is a kind of antenna array calibration method flow diagram in the embodiment of the present invention;
Fig. 8 is a kind of antenna array calibration system construction drawing in the embodiment of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
At timesharing Long Term Evolution (Time Division Long Term Evolution, TD-LTE) in system, in order to reduce the co-channel interference of terminal room, and increase throughput and the coverage of Cell Edge User, usually introduce multi-antenna beam figuration technology in base station side.Because aerial array is affected by environment, become error when existing, so must carry out real time calibration by antenna array calibration (being called for short the AC calibration) to each antenna, compensation magnitude and phase error, thereby correctness and the reliability of assurance figuration.
LTE AC calibration specifically can comprise sending alignment and close alignment two parts.
(1) major function of sending alignment is that amplitude and the phase place of antenna sending direction are calibrated.The DSP of BBU inserts calibrating sequence in the position of each passage GP after receiving high-rise triggering signaling, through BBU-FPGA, RRU, sent by the radio-frequency channel, after mixer closes the road, then is looped back to RRU by calibrated channel.RRU is combined into one the tunnel by radio-frequency (RF) switch with the data of calibrating sequence and antenna.DSP extracts calibrating sequence from receive data, calculate the valuation of sequential channel and frequency domain channel, obtains the antenna factor of each passage.Concrete sending alignment structure as shown in Figure 3.
(2) major function of close alignment is that amplitude and the phase place of antenna reception direction are calibrated.Close alignment is similar to the flow process of sending alignment, and just calibrating sequence only is inserted in the position (specifically which root is determined by RRU hardware) of an antenna GP, sent by calibrated channel, through splitter along separate routes, then by the radio-frequency channel loopback.Concrete close alignment structure as shown in Figure 4.
The transmitting time of the calibrating sequence of sending alignment and close alignment is identical, all at the GP of special subframe time slot.Due to the LTE system, special subframe is adopted the mode of flexible configuration, the GP slot length have multiple may, the shortest time slot is 1 symbol(symbol only) length.For adapting to different proportionings, the length of regulation calibrating sequence is the number of data points of a symbol, take the 20M bandwidth as example, and 2048 sampled points.Consider again the time delay protection, add 32 Cyclic Prefix (Cyclic Prefix, CP) before calibrating sequence.Therefore the calibrating sequence length of 20M bandwidth is 2080 sampled points, near a symbol lengths.The subsequent content of the embodiment of the present invention all describes as an example of the 20M bandwidth example.
Be connected by optical fiber between RRU and BBU, the interface between LTE-IR(RRU and BBU is followed in the transmission of data) the interface protocol standard.The maximum bit wide of the I Q data of agreement regulation transmission is that the actual effectively transmission of 16bit(bit wide is 15bit, and the data of minimum bit are lost, and goes out with remaining the transmission that certain space is used for control word).Accordingly, LTE-IR interface data compression algorithm propose with the I of 16bit the Q data compression be 7bit transmission (need not to lose bit0), volume of transmitted data is reduced by half, thereby reaches the purpose of saving half fiber resource.
IR interface data compression algorithm specifically can be divided into 4 steps:
1. AGC processes: take symbol as unit, the sampling number of getting every front 1/4 symbol of antenna it is calculated that average power, and according to the difference of average power with expectation power, the data of whole symbol is adjusted to expectation power.
2. compression: adopt the A that optimizes to lead compression algorithm, realize that base band data is by the compression of 15bit to 7bit.
3. decompress: be the anti-process of compression, the algorithm of employing depends on compression algorithm.
4. separating AGC processes: be the anti-process that AGC processes.
Wherein, AGC processes and the compression processing is completed at transmitting terminal, and is up in RRU-FPGA, descending in BBU-FPGA; Decompress and separate the AGC processing and complete at receiving terminal, up in BBU-FPGA, descending in RRU-FPGA.Fig. 5 is the structure principle chart of IR interface data compression.
Introduce in detail a kind of antenna array calibration method and system disclosed by the invention below by enumerating several specific embodiments.
Embodiment one
Introduce in detail a kind of disclosed antenna array calibration method of the embodiment of the present invention.
With reference to Fig. 6, show a kind of antenna array calibration method flow diagram in the embodiment of the present invention.
Step 100 is at the calibration information of the first radio frames reception from digital signal processing unit.
Wherein, described calibration information specifically can comprise: the symbolic number at the average power content of calibrating sequence, known described calibrating sequence place and known calibration enable signal.
The average power content of described calibrating sequence can be calculated by the total data of digital signal processing unit according to known described calibrating sequence.Particularly, after DSP receives high-rise calibration triggering signal, get all data (totally 2080 sampled points) of calibrating sequence and calculate average power content.Because calibrating sequence is known, so can calculate in advance average power content.
Wherein, the total data of described calibrating sequence refers to the data of 2080 all sampled points.
DSP by configuration interface, puies forward previous radio frames after calculating the average power content of calibrating sequence, and the average power content of calibrating sequence, calibrating sequence place symbolic number, calibration enable signal are sent to BBU-FPGA.
Wherein, the first radio frames in step 100 is sent symbolic number and the calibration enable signal at the average power content of calibrating sequence, calibrating sequence place.The second radio frames in step 102 is sent the calibrating sequence of correspondence.
Step 104 is carried out gain-adjusted according to comparative result, completes antenna array calibration.
Described step 104 particularly can for:
Carry out gain-adjusted and data compression according to comparative result, by optical fiber, data are sent to RRU, then be looped back to RRU up link, BBU-FPGA through He Luqi splitter, send at last DSP back to and complete antenna array calibration.
In sum, a kind of disclosed antenna array calibration method of the embodiment of the present invention is compared with background technology, has the following advantages:
At first, utilize the total data of calibrating sequence to calculate the average power content of calibrating sequence, compare with only getting the average power content that the partial data in calibrating sequence calculates in background technology, improved the precision of calibrating sequence average power content.
Secondly, average power content and the target gain of the calibrating sequence that improves according to precision compare, and the comparative result that obtains is also correspondingly more accurate.
Again, carry out gain-adjusted according to comparative result more accurately, avoided the distortion situation of data.
Further, with easy method, avoided after the introducing compression algorithm, calibrating sequence being impacted.
Embodiment two
Introduce in detail a kind of disclosed antenna array calibration method of the embodiment of the present invention.
With reference to Fig. 7, show a kind of antenna array calibration method flow diagram in the embodiment of the present invention.
Step 200 is at the calibration information of the first radio frames reception from digital signal processing unit.
Wherein, described calibration information specifically can comprise: the symbolic number at the average power content of calibrating sequence, known described calibrating sequence place and known calibration enable signal.
The average power content of described calibrating sequence is calculated by the total data of digital signal processing unit according to known described calibrating sequence.
Step 202 is in the second radio frames is inserted into normal data with known described calibrating sequence.
Described the first radio frames is connected with described the second radio frames, and described the first radio frames is before described the second radio frames.
The first radio frames is sent symbolic number and the calibration enable signal at the average power content of calibrating sequence, calibrating sequence place.The second radio frames is sent the calibrating sequence of correspondence.
Described step 202 specifically can comprise:
In the second radio frames is inserted into two adjacent symbols with known described calibrating sequence.The calibrating sequence of front 20us is placed on the position of the rear 20us of first symbol, and remaining calibrating sequence is placed on the front end of the 2nd symbol.
Wherein, when protecting time slot greater than a symbol, described calibrating sequence is inserted into adjacent 2 symbols of protection time slot, and when the protection time slot equaled a symbol, described calibrating sequence was inserted into last 1 symbol of descending pilot frequency time slot and 1 symbol of protection time slot.
Step 204, according to the symbolic number at known described calibrating sequence place and known described calibration enable signal, at the second radio frames search calibrating sequence, and the calibrating sequence that searches is adopted the described calibrating sequence average power content that receives, compare with known target gain.
Step 206 is carried out gain-adjusted according to comparative result, completes antenna array calibration.
Described step 206 specifically can comprise:
The amplitude that the average power content calculated gains of the described calibrating sequence of foundation is regulated.
During greater than target gain, reduce the amplitude of total data when the average power content of described calibrating sequence.
During less than target gain, increase the amplitude of total data when the average power content of described calibrating sequence.
In embodiments of the present invention, the time point that calibrating sequence sends shifts to an earlier date descending reference frame head 20us, therefore is looped back to just to cause with up reference frame is first when up, so do not need to distinguish normal data, calibration data when carrying out data compression, the unified processing gets final product.
And, only having the configuration of 1 symbol for GP, calibrating sequence can take the duration of 20us after last symbol of descending pilot frequency time slot.The operating position of considering this configuration is few, and calibrates and just did once in general 1 hour, is therefore acceptable on the impact of calibration.
In sum, a kind of disclosed antenna array calibration method of the embodiment of the present invention is compared with background technology, has the following advantages:
At first, utilize the total data of calibrating sequence to calculate the average power content of calibrating sequence, compare with only getting the average power content that the partial data in calibrating sequence calculates in background technology, improved the precision of calibrating sequence average power content.
Secondly, average power content and the target gain of the calibrating sequence that improves according to precision compare, and the comparative result that obtains is also correspondingly more accurate.
Again, carry out gain-adjusted according to comparative result more accurately, avoided the distortion situation of data.
Further, with easy method, avoided after the introducing compression algorithm, calibrating sequence being impacted.
Embodiment three
Introduce in detail the disclosed a kind of antenna array calibration of embodiment of the present invention system.
With reference to Fig. 8, show a kind of antenna array calibration system construction drawing in the embodiment of the present invention.
Described a kind of antenna array calibration system specifically can comprise:
Digital signal processing unit 30, and, BBU-FPGA unit 32.
The below introduces respectively the function of each unit and the relation between each unit in detail.
Digital signal processing unit 30 is for calculate the average power content of described calibrating sequence according to the total data of known calibrating sequence.
Described digital signal processing unit 30 also is used in the second radio frames, known described calibrating sequence being inserted into normal data.
Particularly, described digital signal processing unit 30 is in the second radio frames is inserted into two adjacent symbols with known described calibrating sequence.
Wherein, when protecting time slot greater than a symbol; described digital signal processing unit 30 is inserted into 2 adjacent symbols of protection time slot with described calibrating sequence; when the protection time slot equaled a symbol, described digital signal processing unit 30 was inserted into last 1 symbol of descending pilot frequency time slot and 1 symbol of protection time slot with described calibrating sequence.
BBU-FPGA unit 32, be used at the calibration information of the first radio frames reception from described digital signal processing unit, wherein, described calibration information comprises: the symbolic number at the average power content of described calibrating sequence, known described calibrating sequence place and known calibration enable signal; According to the symbolic number at known described calibrating sequence place and known described calibration enable signal, at the second radio frames search calibrating sequence, and the calibrating sequence that searches is adopted the described calibrating sequence average power content that receives, compare with known target gain; Carry out gain-adjusted according to comparative result, complete antenna array calibration.
Described the first radio frames is connected with described the second radio frames, and described the first radio frames is before described the second radio frames.
The amplitude that described BBU-FPGA unit 32 is regulated according to the average power content calculated gains of described calibrating sequence.
When the average power content of described calibrating sequence during greater than target gain, described BBU-FPGA unit 32 reduces the amplitude of total datas.
When the average power content of described calibrating sequence during less than target gain, described BBU-FPGA unit 32 increases the amplitude of total datas.
In sum, the disclosed a kind of antenna array calibration of embodiment of the present invention system compares with background technology, has the following advantages:
At first, utilize the total data of calibrating sequence to calculate the average power content of calibrating sequence, compare with only getting the average power content that the partial data in calibrating sequence calculates in background technology, improved the precision of calibrating sequence average power content.
Secondly, average power content and the target gain of the calibrating sequence that improves according to precision compare, and the comparative result that obtains is also correspondingly more accurate.
Again, carry out gain-adjusted according to comparative result more accurately, avoided the distortion situation of data.
Further, in the antenna array calibration system of routine, owing to having adopted LTE-IR interface Bit data compression algorithm, so calibration system can't work.A kind of antenna array calibration system in the embodiment of the present invention has avoided after the introducing compression algorithm, calibrating sequence being impacted with easy method.
For system embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part gets final product referring to the part explanation of embodiment of the method.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.
Above to the disclosed a kind of antenna array calibration method and system of the embodiment of the present invention, be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. an antenna array calibration method, is characterized in that, comprising:
Receive calibration information from digital signal processing unit in the first radio frames, wherein, described calibration information comprises: the symbolic number at the average power content of calibrating sequence, known described calibrating sequence place and known calibration enable signal; The average power content of described calibrating sequence is calculated by the total data of digital signal processing unit according to known described calibrating sequence;
According to the symbolic number at known described calibrating sequence place and known described calibration enable signal, at the second radio frames search calibrating sequence, and the calibrating sequence that searches is adopted the described calibrating sequence average power content that receives, compare with known target gain;
Carry out gain-adjusted according to comparative result, complete antenna array calibration.
2. method according to claim 1, is characterized in that,
Described the first radio frames is connected with described the second radio frames, and described the first radio frames is before described the second radio frames.
3. method according to claim 1, is characterized in that, also comprises:
In the second radio frames is inserted into normal data with known described calibrating sequence.
4. method according to claim 3, is characterized in that, and is described in the second radio frames is inserted into normal data with known described calibrating sequence, comprising:
In the second radio frames is inserted into two adjacent symbols with known described calibrating sequence;
Wherein, when protecting time slot greater than a symbol, described calibrating sequence is inserted into 2 adjacent symbols of protection time slot, and when the protection time slot equaled a symbol, described calibrating sequence was inserted into last 1 symbol of descending pilot frequency time slot and 1 symbol of protection time slot.
5. method according to claim 1, is characterized in that, describedly carries out gain-adjusted according to comparative result, comprising:
The amplitude that the average power content calculated gains of the described calibrating sequence of foundation is regulated;
During greater than target gain, reduce the amplitude of total data when the average power content of described calibrating sequence;
During less than target gain, increase the amplitude of total data when the average power content of described calibrating sequence.
6. an antenna array calibration system, is characterized in that, comprising:
Digital signal processing unit is for calculate the average power content of described calibrating sequence according to the total data of known calibrating sequence;
The BBU-FPGA unit, be used at the calibration information of the first radio frames reception from described digital signal processing unit, wherein, described calibration information comprises: the symbolic number at the average power content of described calibrating sequence, known described calibrating sequence place and known calibration enable signal; According to the symbolic number at known described calibrating sequence place and known described calibration enable signal, at the second radio frames search calibrating sequence, and the calibrating sequence that searches is adopted the described calibrating sequence average power content that receives, compare with known target gain; Carry out gain-adjusted according to comparative result, complete antenna array calibration.
7. system according to claim 6, is characterized in that,
Described the first radio frames is connected with described the second radio frames, and described the first radio frames is before described the second radio frames.
8. system according to claim 6, is characterized in that,
Described digital signal processing unit also is used in the second radio frames, known described calibrating sequence being inserted into normal data.
9. system according to claim 8, is characterized in that,
Described digital signal processing unit is in the second radio frames is inserted into two adjacent symbols with known described calibrating sequence;
Wherein, when protecting time slot greater than a symbol; described digital signal processing unit is inserted into 2 adjacent symbols of protection time slot with described calibrating sequence; when the protection time slot equaled a symbol, described digital signal processing unit was inserted into last 1 symbol of descending pilot frequency time slot and 1 symbol of protection time slot with described calibrating sequence.
10. system according to claim 6, is characterized in that,
The amplitude that described BBU-FPGA unit is regulated according to the average power content calculated gains of described calibrating sequence;
During greater than target gain, described BBU-FPGA reduces the unit amplitude of total data when the average power content of described calibrating sequence;
When the average power content of described calibrating sequence during less than target gain, described BBU-FPGA unit increases the amplitude of total data.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105007106A (en) * | 2015-06-15 | 2015-10-28 | 大唐移动通信设备有限公司 | Signal compression method, BBU, and distributed base station system |
| CN107689842A (en) * | 2016-08-05 | 2018-02-13 | 北京信威通信技术股份有限公司 | A kind of method and device of calibration data |
| CN113055058A (en) * | 2019-12-27 | 2021-06-29 | 中兴通讯股份有限公司 | Base station, multi-antenna transceiver and control method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1176555C (en) * | 2002-12-25 | 2004-11-17 | 大唐移动通信设备有限公司 | Method for adjusting intelligences antenna array system in real time |
| CN102035076B (en) * | 2009-09-29 | 2014-06-04 | 电信科学技术研究院 | Antenna calibration system and method |
| US8340612B2 (en) * | 2010-03-31 | 2012-12-25 | Ubidyne, Inc. | Active antenna array and method for calibration of the active antenna array |
| CN102315868B (en) * | 2010-07-08 | 2014-09-10 | 中兴通讯股份有限公司 | Method and system for calibrating antenna of distributed base station |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105007106A (en) * | 2015-06-15 | 2015-10-28 | 大唐移动通信设备有限公司 | Signal compression method, BBU, and distributed base station system |
| CN105007106B (en) * | 2015-06-15 | 2019-03-12 | 大唐移动通信设备有限公司 | A kind of compression method, BBU and its distributed base station system |
| CN107689842A (en) * | 2016-08-05 | 2018-02-13 | 北京信威通信技术股份有限公司 | A kind of method and device of calibration data |
| CN113055058A (en) * | 2019-12-27 | 2021-06-29 | 中兴通讯股份有限公司 | Base station, multi-antenna transceiver and control method thereof |
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