CN106803774A - Antenna and radio-frequency channel calibration system and method - Google Patents
Antenna and radio-frequency channel calibration system and method Download PDFInfo
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- CN106803774A CN106803774A CN201510836568.1A CN201510836568A CN106803774A CN 106803774 A CN106803774 A CN 106803774A CN 201510836568 A CN201510836568 A CN 201510836568A CN 106803774 A CN106803774 A CN 106803774A
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Abstract
The invention discloses antenna and radio-frequency channel calibration system and method, including baseband signal processor, N number of antenna and radio-frequency channel and calibration signal processing unit；The baseband signal processor is connected with each antenna and radio-frequency channel respectively, for receiving and dispatching test signal between each antenna and radio-frequency channel；The system also includes N-1 branch combiner unit, and each branch combiner unit is separately positioned in an antenna and radio-frequency channel, and each branch combiner unit sequential series, for the test signal that each antenna and radio-frequency channel are received and dispatched to be carried out into branch or combining one by one；Calibration signal processing unit, is connected with the branch combiner unit and the baseband signal processor of series connection end respectively, for being calibrated to test signal, and feeds back to the baseband signal processor and carries out compensation for calibrating errors calculating.The space of calibration system can be saved using said system, structure complexity is reduced, reduces the length and quantity of signal calibration line, while reducing loss.
Description
Technical field
The present invention relates to antenna technical field, more particularly to antenna and radio-frequency channel calibration system and method.
Background technology
Current time division duplex (Time Division Duplexing, TDD) radio frequency (RF) end of every antenna of communication system needs two sets of circuits to realize sending and receiving function, due to the fabrication error of hardware aspect, plus the change of the phase and impedance of amplifier nonlinearity distortion and wave filter, it is difficult to ensure that the circuit uniformity of each interchannel.And the characteristic response of each radio circuit changes also with the change of the external environment conditions such as working frequency, time, temperature and humidity.In order to eliminate influence of the deviation between each radio frequency reception and transmission channel to channel, it is ensured that the reciprocity of radio-frequency channel using the collimation technique of radio frequency path, it is necessary to ensure the uniformity of different passage amplitudes and phase.
Current universal calibrated channel (it is assumed that K passage) is made up of K antenna and radio-frequency channel, K coupler, transceiver, calibration signal radio-frequency cable, combining shunt, calibrated channel processing unit etc..Wherein generally using the structure of Weir gold power splitter, the calibration signal of each antenna and radio-frequency channel can be combined and branch combining shunt by combining shunt.When antenna and more radio-frequency channel quantity, the quantity and length that each passage is pooled to the calibration signal line of combining shunt are greatly increased, the calibration signal line of a large amount of duplicate paths is produced, the complexity of circuit layout wiring is increased, and long cabling brings unnecessary differential loss.Secondly, area is larger in itself for Weir gold power splitter, and bus is more long, can also increase circuit layout wiring and the integrally-built complexity of calibrated channel, while bringing unnecessary loss.
The content of the invention
In view of this, the embodiment of the present invention provides antenna and radio-frequency channel calibration system and method, to solve antenna in the prior art and radio-frequency channel calibration system circuit layout wiring complexity and excessive technical problem is lost.
In a first aspect, a kind of antenna and radio-frequency channel calibration system are the embodiment of the invention provides, including baseband signal processor, N number of antenna and radio-frequency channel and calibration signal processing unit, wherein, N is the integer more than or equal to 2：
The baseband signal processor, is connected with each antenna and radio-frequency channel respectively, for receiving and dispatching test signal between each antenna and radio-frequency channel；
The system also includes N-1 branch combiner unit, and each branch combiner unit is separately positioned in an antenna and radio-frequency channel, and each branch combiner unit sequential series, for the test signal that each antenna and radio-frequency channel are received and dispatched to be carried out into branch or combining one by one；
Calibration signal processing unit, is connected with the branch combiner unit and the baseband signal processor of series connection end respectively, for being calibrated to test signal, and feeds back to the baseband signal processor and carries out compensation for calibrating errors calculating.
Second aspect, the embodiment of the present invention additionally provides the emission calibrating method of a kind of antenna and radio-frequency channel, and the antenna and radio-frequency channel calibration system provided using the embodiment of the present invention are performed, and methods described includes：
When transmission channel is calibrated, each antenna and radio-frequency channel obtain the original test signal that baseband signal processor sends, and transmit the original test signal to corresponding branch combiner unit；
Each branch combiner unit successively merges each original test signal, is formed and merges test signal, and sent to the calibration signal processing unit；
The calibration signal processing unit receives the merging test signal, carries out calibration process and forms calibration test signal, and feeds back to the baseband signal processor；
The baseband signal processor compares the calibration test signal and the original test signal, determines compensation for calibrating errors result.
The third aspect, the embodiment of the present invention additionally provides the reception calibration method of a kind of antenna and radio-frequency channel, and the antenna provided using the embodiment of the present invention and radio-frequency channel calibration system are performed, and methods described includes：
When receiving channel is calibrated, calibration signal processing unit order obtains each original test signal that baseband signal processor sends, and calibration process is carried out to each original test signal and is merged to obtain merging test signal, and transmit to corresponding branch combiner unit；
The merging test signal is carried out branch process by each branch combiner unit one by one, obtains calibration test signal, and be respectively sent to corresponding antenna and radio-frequency channel；
Each antenna and radio-frequency channel send to the baseband signal processor calibration test signal for obtaining；
The BBP compares the calibration test signal for receiving with the original test signal successively, determines compensation for calibrating errors result.
A kind of antenna provided in an embodiment of the present invention and radio-frequency channel calibration system and method, the system include：N number of antenna and radio-frequency channel and the baseband signal processor that each antenna and radio-frequency channel are connected, be arranged on each antenna and radio-frequency channel in N-1 branch combiner unit and the calibration signal processor that is connected with branch combiner unit and base band signal process respectively, wherein, each branch combiner unit sequential series, series connection end is connected with calibration signal processor.Using said system, each branch combiner unit sequential series and the space that can save calibration system is arranged in corresponding antenna and radio-frequency channel, reduces structure complexity, reduce the length and quantity of signal calibration line, while reducing loss.
Brief description of the drawings
The detailed description made to non-limiting example made with reference to the following drawings by reading, other features, objects and advantages of the invention will become more apparent upon：
Fig. 1 is the structural representation of the antenna that the embodiment of the present invention one is provided and radio-frequency channel calibration system；
Fig. 2 is the structural representation of the antenna that the embodiment of the present invention one is provided and radio-frequency channel；
Fig. 3 is the structural representation of the antenna that the embodiment of the present invention two is provided and radio-frequency channel calibration system；
Fig. 4 is the structural representation of the antenna that the embodiment of the present invention three is provided and radio-frequency channel calibration system；
Fig. 5 is the flow chart of the emission calibrating method of the antenna that the embodiment of the present invention four is provided and radio-frequency channel；
Fig. 6 is the flow chart of the reception calibration method of the antenna that the embodiment of the present invention five is provided and radio-frequency channel.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that specific embodiment described herein is used only for explaining the present invention, rather than limitation of the invention.For the ease of description, part rather than full content related to the present invention is illustrate only in accompanying drawing.
Embodiment one
Fig. 1 is the structural representation of a kind of antenna that the embodiment of the present invention one is provided and radio-frequency channel calibration system, as shown in figure 1, the system includes：Baseband signal processor 101, N number of antenna and radio-frequency channel 102 and calibration signal processing unit 103, wherein N are the integer more than or equal to 2；
The baseband signal processor 101, is connected with each antenna and radio-frequency channel 102 respectively, for receiving and dispatching test signal between each antenna and radio-frequency channel 102；
The system also includes N-1 branch combiner unit 104, each branch combiner unit 104 is separately positioned in an antenna and radio-frequency channel 102, and each sequential series of branch combiner unit 104, for the test signal that each antenna and radio-frequency channel 102 are received and dispatched to be carried out into branch or combining one by one；
Calibration signal processing unit 103, is connected with the branch combiner unit 104 and the baseband signal processor 101 of series connection end respectively, for being calibrated to test signal, and feeds back to the baseband signal processor 101 and carries out compensation for calibrating errors calculating.
Exemplary, test signal is baseband signal, and specific characteristics of signals can be set according to actual conditions.When antenna and radio-frequency channel 102 are used to launch, baseband signal processor 101 is to the antenna and the sending signal of radio-frequency channel 102.When antenna and radio-frequency channel 102 are used to receive, the signal that the reception antenna of base band signal process 101 and radio-frequency channel 102 send.The system is also connected including N-1 branch combiner unit 104, and the branch combiner unit 104 of head end of connecting is connected with two antennas and radio-frequency channel 102 respectively.I.e. series connection head end branch combiner unit 104 be arranged in second antenna and radio-frequency channel 102, lead to first antenna and the antenna of radio-frequency channel 102, second respectively 102 and next branch combiner unit 104 connect.The branch combiner unit 104 of series connection end is connected with corresponding antenna and radio-frequency channel 102, a upper branch combiner unit 104 and calibration signal processing unit 103 respectively.Remaining sequential series of branch combiner unit 104, and be connected with corresponding antenna and radio-frequency channel 102.When 102 transmitting calibration of antenna and radio-frequency channel, test signal in corresponding antenna and radio-frequency channel 102 is combined into signal all the way by branch combiner unit 104 with the test signal that the branch combiner unit 104 connected sends according to default combining rule, is sent to the branch combiner unit 104 or calibration signal processing unit 103 of next series connection.When antenna and radio-frequency channel receive calibration, branch combiner unit 104 receives the test signal of the transmission of branch combiner unit 104 of calibration signal processing unit 103 or series connection and according to default branch rule branch, is sent to the branch combiner unit 104 of corresponding antenna and radio-frequency channel 102 and next series connection.The default regular and default branch rule of combining can be set according to actual conditions, be not construed as limiting here.The system also includes calibration signal processing unit 103, when 102 transmitting calibration of antenna and radio-frequency channel, the test signal that the reception of the calibration signal processing unit 103 series connection end branch combiner unit 104 sends, and feed back to baseband signal processor 101 after calibration process is carried out to the test signal, base band signal process 101 compares the test signal of reception with originally transmitted test signal, and carrying out compensation for calibrating errors according to comparison result calculates the compensation result of determination test signal and compensate.When antenna and radio-frequency channel 102 receive calibration, the calibration signal processing unit 103 receives the test signal that baseband signal processor 101 sends successively, and by each test signal carry out calibration process and be merged into test signal all the way be sent to series connection end branch combiner unit 104, each branch combiner unit 104 carries out branch to test signal and is sent to corresponding antenna and radio-frequency channel 102 one by one, test signal is fed back to baseband signal processor 101 by antenna and radio-frequency channel 102, base band signal process 101 compares each test signal for receiving with originally transmitted test signal, compensation for calibrating errors is carried out according to comparison result to calculate the compensation result of determination test signal and compensate.Specific calibration rule and compensation calculation rule can be set according to actual conditions, be not construed as limiting here.
Further, the antenna and radio-frequency channel 102 include the connected transceiver 1022 and coupler 1021 of order, and the coupler 1021 is connected with the branch combiner unit 104.
Exemplary, Fig. 2 is the structural representation of the antenna that the embodiment of the present invention one is provided and radio-frequency channel.As shown in Fig. 2 the antenna and radio-frequency channel 102 include the connected transceiver 1022 and coupler 1021 of order.Wherein transceiver 1022 is connected with baseband signal processor 101, and coupler 1021 is connected with corresponding branch combiner unit 104.
Antenna and radio-frequency channel calibration system that the embodiment of the present invention one is provided, the system include：N number of antenna and radio-frequency channel and the baseband signal processor that each antenna and radio-frequency channel are connected, be arranged on each antenna and radio-frequency channel in N-1 branch combiner unit and the calibration signal processing unit that is connected with branch combiner unit and baseband signal processor respectively, wherein, each branch combiner unit sequential series, series connection end is connected with calibration signal processing unit.Using said system, each branch combiner unit is connected in series the space for being placed in corresponding antenna and radio-frequency channel that calibration system can be saved, and reduces structure complexity, reduces the length and quantity of signal calibration line, while reducing loss.
Embodiment two
Fig. 3 is the structural representation of a kind of antenna that the embodiment of the present invention two is provided and radio-frequency channel calibration system, and the present embodiment increased at least two branch combiner units on the basis of the calibration system that embodiment one is provided and connect the serial array and combining shunt to be formed.As shown in figure 3, the system also includes：
The series connection of at least two branch combiner unit 104 forms serial array 106, and the quantity of the serial array 106 is at least two；
The system also includes combining shunt 105, is connected with each serial array 106, and be connected with the calibration signal processing unit 103.
Exemplary, the sequential series of at least two branch combiner unit 104 form a serial array 106, and each branch combiner unit 104 in serial array 106 is arranged in corresponding antenna and radio-frequency channel 102.At least two serial arrays 106 are included in the antenna and radio-frequency channel calibration system.The system also includes combining shunt 105, and the series connection end of each serial array 106 is connected with combining shunt 105 respectively, i.e., be between each serial array 106 and company's relation.Can be combined for the test signal that each serial array 106 sends and be sent to calibration signal processing unit 103 by combining shunt 105, and the test signal that can also be sent calibration signal processing unit 103 carries out branch and is sent to each serial array 106.
A kind of antenna and radio-frequency channel calibration system that the embodiment of the present invention two is provided, the system also include at least two serial arrays and combining shunt, and the serial array includes at least two branch combiner unit sequential series.Combining shunt is connected with each serial array, and also is connected with the calibration signal processing unit.Using above-mentioned antenna and radio-frequency channel calibration system, the use of serial array and Ge Lu shunts can in increase system antenna and radio-frequency channel quantity, while simplied system structure, save space.
Embodiment three
Fig. 4 is the structural representation of a kind of antenna that the embodiment of the present invention three is provided and radio-frequency channel calibration system, and the present embodiment increased at least two branch combiner unit serial arrays and at least one main line branch combiner unit on the basis of the antenna and radio-frequency channel calibration system that embodiment one is provided.As shown in figure 4, the system also includes：
The series connection of at least two branch combiner unit 104 forms serial array 106, and the quantity of the serial array 106 is at least two；
The system also includes at least one main line branch combiner unit 107, is connected with the serial array 106 respectively, and the main line branch combiner unit 107 is connected to the calibration signal processing unit 103.
Exemplary, each main line branch combiner unit 107 is connected in series, and connected with corresponding serial array 106 respectively, i.e., each serial array 106 is connected in series.The main line branch combiner unit 107 of head end is connected with two serial arrays 106 respectively, and the main line branch combiner unit 107 of tail end is connected with calibration signal processing unit 103.Each main line branch combiner unit 107 can carry out branch or combining according to preset rules to test signal.When 102 transmitting calibration of antenna and radio-frequency channel, the test signal synthesis that each main line branch combiner unit 107 will be received successively is all the way, when antenna and radio-frequency channel 103 receive calibration, the test signal that each main line branch combiner unit 107 will be received successively is divided into two-way.Specific preset rules can be set according to actual conditions, be not construed as limiting here.
A kind of antenna and radio-frequency channel calibration system that the embodiment of the present invention three is provided, the system also include at least two serial arrays and at least one main line branch combiner unit, and the serial array includes at least two branch combiner unit sequential series.Each serial array is connected with corresponding main line branch combiner unit respectively, each main line branch combiner unit sequential series and end is connected with the calibration signal processing unit.Using above-mentioned antenna and radio-frequency channel calibration system, the use of serial array and main line branch combiner unit can in increase system antenna and radio-frequency channel quantity, while the structure of system, save space can also be simplified.
Example IV
Fig. 5 is the flow chart of the emission calibrating method of a kind of antenna that the embodiment of the present invention four is provided and radio-frequency channel, and the antenna and radio-frequency channel calibration system that the emission calibrating method that the present embodiment is provided is provided by above-mentioned any embodiment are performed.As shown in figure 5, the method includes：
When S510, transmission channel are calibrated, each antenna and radio-frequency channel obtain the original test signal that baseband signal processor sends, and transmit the original test signal to corresponding branch combiner unit.
Exemplary, the antenna and radio-frequency channel include transceiver and coupler.Transceiver obtains the original test signal that baseband signal processor sends, and sends to coupler, and the original test signal is coupled to corresponding branch combiner unit by coupler.
S520, each branch combiner unit successively merge each original test signal, are formed and merge test signal, and sent to the calibration signal processing unit.
Exemplary, the original test signal that each branch combiner unit will be received successively is merged, the branch combiner unit output of series connection end merges test signal to calibration signal processing unit all the way, and the specific rule that merges can be set according to actual conditions, be not construed as limiting here.
S530, the calibration signal processing unit receive the merging test signal, carry out calibration process and form calibration test signal, and feed back to the baseband signal processor.
Exemplary, calibration signal processing unit carries out calibration process to the merging test signal for receiving and forms calibration test signal, and specific calibration process rule can be set according to actual conditions, is not construed as limiting here.Baseband signal processor is fed back to after forming calibration test signal.
S540, the baseband signal processor compare the calibration test signal and the original test signal, determine compensation for calibrating errors result.
Exemplary, calibration test signal and the original test signal that baseband signal processor will be received are compared, and determine compensation for calibrating errors result according to comparison result, and original test signal is compensated according to compensation result.
A kind of antenna and the emission calibrating method of radio-frequency channel that the embodiment of the present invention four is provided, each antenna and radio-frequency channel obtain the original test signal of baseband signal processor transmitting and send to corresponding branch combiner unit, each branch combiner unit successively merges original test signal, merging test signal is finally given to send to calibration signal processing unit, calibration signal processing unit carries out calibration process formation calibration test signal and feeds back to baseband signal processor to merging test signal, calibration test signal and the original test signal that baseband signal processor will be received are compared, and determine compensation for calibrating errors result.Using the above method, the complexity of antenna and radio-frequency channel calibration system can be reduced, while save space, reduces loss so that calibration result is more accurate.
Embodiment five
Fig. 6 is the flow chart of the reception calibration method of a kind of antenna that the embodiment of the present invention five is provided and radio-frequency channel, and the antenna and radio-frequency channel calibration system that the reception calibration method that the present embodiment is provided is provided by above-mentioned any embodiment are performed.As shown in fig. 6, the method includes：
When S610, receiving channel are calibrated, calibration signal processing unit order obtains each original test signal that baseband signal processor sends, and calibration process is carried out to each original test signal and is merged to obtain merging test signal, and transmit to corresponding branch combiner unit.
Exemplary, the transmission time of each original test signal is different, and characteristics of signals is identical, and the number of original test signal is identical with the number of antenna and radio-frequency channel.Calibration signal processing unit order obtains each original test signal that baseband signal processor sends, calibration process is carried out to each original test signal and is synthesized to obtain merging test signal all the way, and merging test signal is transferred to the branch combiner unit of serial array end.
The merging test signal is carried out branch process by S620, each branch combiner unit one by one, obtains calibration test signal, and be respectively sent to corresponding antenna and radio-frequency channel.
Exemplary, branch combiner unit serial array receives merging test signal, each branch combiner unit will merge test signal according to default branch rule one by one carries out branch process, two paths of signals is obtained after each branch combiner unit branch, and it is respectively sent to corresponding antenna and radio-frequency channel and next branch combiner unit, the signal that each antenna and radio-frequency channel receive is calibration test signal, and the signal of reception is divided into two-way and is sent respectively to first and second antenna and radio-frequency channel by the branch combiner unit of serial array head end.Specific branch rule can be set according to actual conditions, be not construed as limiting here.
S630, each antenna and radio-frequency channel send to the baseband signal processor calibration test signal for obtaining.
Exemplary, the calibration test signal that each branch combiner unit obtains branch is sent to corresponding antenna and radio-frequency channel, coupler in each antenna and radio-frequency channel receives calibration test signal and coupled to transceiver, is sent to baseband signal processor by transceiver.
S640, the baseband signal processor compare the calibration test signal for receiving with the original test signal successively, determine compensation for calibrating errors result.
Exemplary, baseband signal processor receives the calibration test signal that each antenna and radio-frequency channel send, and compares with original test signal successively, determines compensation for calibrating errors result, and the original test signal is compensated according to compensation result.
A kind of antenna and the reception calibration method of radio-frequency channel that the embodiment of the present invention five is provided, calibration signal processing unit obtains the original test signal that baseband signal processor sends successively, and to each original test signal calibration process and it is merged into merging test signal, it is sent to corresponding branch combiner unit, each branch combiner unit carries out branch to merging test signal one by one, obtain each calibration test signal and send to corresponding antenna and radio-frequency channel, the calibration test signal of reception is sent to baseband signal processor by each antenna and radio-frequency channel, the calibration test signal of reception is compared and obtains compensation for calibrating errors result by baseband signal processor with the original test signal successively.Using the above method, the complexity of antenna and radio-frequency channel calibration system can be reduced, while save space, reduces loss so that calibration result is more accurate.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that the invention is not restricted to specific embodiment described here, various obvious changes being carried out for a person skilled in the art, being readjusted and is substituted without departing from protection scope of the present invention.Therefore, although being described in further detail to the present invention by above example, the present invention is not limited only to above example, without departing from the inventive concept, more other Equivalent embodiments can also be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (7)
1. a kind of antenna and radio-frequency channel calibration system, including baseband signal processor, N number of antenna and penetrate
Frequency passage and calibration signal processing unit, wherein, N is the integer more than or equal to 2, it is characterised in that：
The baseband signal processor, is connected with each antenna and radio-frequency channel respectively, for each antenna and penetrate
Test signal is received and dispatched between frequency passage；
The system also includes N-1 branch combiner unit, and each branch combiner unit is separately positioned on one
In antenna and radio-frequency channel, and each branch combiner unit sequential series, for each antenna and radio-frequency channel to be received
The test signal of hair carries out branch or combining one by one；
The calibration signal processing unit, respectively with the branch combiner unit and the baseband signal of end of connecting
Processor is connected, and for being calibrated to test signal, and feeds back to the baseband signal processor and carries out school
Quasi- compensation calculation.
2. system according to claim 1, it is characterised in that the antenna and radio-frequency channel include
Order connected transceiver and coupler, the coupler are connected with the branch combiner unit.
3. system according to claim 1, it is characterised in that the branch combiner unit of series connection head end,
It is connected with two antennas and radio-frequency channel respectively.
4. system according to claim 1, it is characterised in that
At least two branch combiner units connect to form serial array, and the quantity of the serial array is at least two
It is individual；
The system also include combining shunt, be connected with each serial array, and with the calibration signal
Processing unit is connected.
5. system according to claim 1, it is characterised in that：
At least two branch combiner units connect to form serial array, and the quantity of the serial array is at least two
It is individual；
The system also includes at least one main line branch combiner unit, is connected with the serial array respectively,
And the main line branch combiner unit is connected to the calibration signal processing unit.
6. the emission calibrating method of a kind of antenna and radio-frequency channel, it is characterised in that using claim 1-5
Any described antenna and radio-frequency channel calibration system are performed, and methods described includes：
When transmission channel is calibrated, each antenna and radio-frequency channel obtain the original test that baseband signal processor sends
Signal, and transmit the original test signal to corresponding branch combiner unit；
Each branch combiner unit successively merges each original test signal, is formed and merges test letter
Number, and send to the calibration signal processing unit；
The calibration signal processing unit receives the merging test signal, carries out calibration process and forms calibration survey
Trial signal, and feed back to the baseband signal processor；
The baseband signal processor compares the calibration test signal and the original test signal,
Determine compensation for calibrating errors result.
7. the reception calibration method of a kind of antenna and radio-frequency channel, it is characterised in that using claim 1-5
Any described antenna and radio-frequency channel calibration system are performed, and methods described includes：
When receiving channel is calibrated, calibration signal processing unit order obtains each original that baseband signal processor sends
Beginning test signal, calibration process is carried out to each original test signal and is merged to obtain merging test signal, and pass
Transport to corresponding branch combiner unit；
The merging test signal is carried out branch process by each branch combiner unit one by one, is obtained calibration and is surveyed
Trial signal, and it is respectively sent to corresponding antenna and radio-frequency channel；
Each antenna and radio-frequency channel send to the baseband signal calibration test signal for obtaining
Processor；
The calibration test signal that the baseband signal processor will be received is believed with the original test successively
Number compare, determine compensation for calibrating errors result.
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