CN100352298C - Array channel correcting method and device for time-division and duplex intelligent antenna - Google Patents

Array channel correcting method and device for time-division and duplex intelligent antenna Download PDF

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CN100352298C
CN100352298C CNB2004100738977A CN200410073897A CN100352298C CN 100352298 C CN100352298 C CN 100352298C CN B2004100738977 A CNB2004100738977 A CN B2004100738977A CN 200410073897 A CN200410073897 A CN 200410073897A CN 100352298 C CN100352298 C CN 100352298C
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passage
correction
weights
channel
descending
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CN1747569A (en
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李景毅
谢玉堂
王长明
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ZTE Corp
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ZTE Corp
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Abstract

The present invention discloses an array channel correcting method and device for time-division and duplex intelligent antenna systems. The front end of a transceiver of a first channel is provided with a switching array; normal reception and transmission and the connection of an uplink and a downlink correcting chain circuits are realized through switching. During uplink correction, a known sequence is outputted to the transmitter of the first channel for communicating the uplink correcting chain circuit, and known characteristic signals after the response of each communication reception channel are detected and sampled for preservation; during downlink correction, the known sequence is orderly outputted to downlink N channel transmitters for communicating the downlink correcting chain circuit, and the transmitter of the first channel is used for detecting and sampling the known characteristic signals after the time-sharing response of downlink channels corrected at present for preservation. A solving relevant algorithm is adopted according to received sampled data and the known sequence for obtaining the correcting right values of all uplink and downlink channels for weighing to use when an uplink and a downlink beams are formed. The present invention can realize the correction of the amplitude of array channels and phase errors, has the advantages of no need of secondary channels, simple algorithm and high correcting precision, and can also realize on-line correction.

Description

A kind of bearing calibration and device of time division duplex antenna system array channel
Technical field
The present invention relates to the bearing calibration and the device of the antenna system array channel of field of mobile communication time division duplex (TDD) working method, particularly relate to the bearing calibration and the device of intelligent antenna base station array channel amplitude phase error.
Background technology
In antenna system, by array channel being received and the signal of emission carries out the width of cloth, weighting comes the direction and the shape of control antenna wave beam mutually, to realize directional transmissions and reception to desired user.Thereby realize airspace filter and reduce co-channel interference power improves communication quality, increase communication distance, expansion system communication capacity with arrival purpose.
The array data feedback channel of actual antenna system or the transmission characteristic between down going channel are imperfect, and promptly there is error in array.This error has time-varying characteristics, if error is difficult to realize directional transmissions than performance and antenna system performance decrease that senior general causes the base band beamforming algorithm.Therefore channel correcting is a key technology in the antenna system.
The alignment technique of existing TDD working method intelligent antenna array has following several:
1) off-line correction: the amplitude, phase place of directly measuring antenna, radio-frequency front-end (LNA, Linear Power Amplifier, coupler), cable, the transceiver of each passage is with the data of operating frequency and variation of ambient temperature and be stored in the system, and system calculates and is coupled into one group of offset data according to the working temperature that detects in real time and proofreaies and correct in base band.This method can not satisfy the correction accuracy requirement.
2) utilize the beacon transceiver that is in the far-field region to detect and proofread and correct and require no multipath transmisstion.Real system is difficult to realize.
3) utilize auxiliary transceiver channel and array channel formation up-downgoing corrected link, the realization of correcting algorithm and signal transmission path complexity have increased the complexity of system, and the precision of correcting algorithm is not high.
Summary of the invention
The technical problem to be solved in the present invention is the bearing calibration that proposes a kind of time division duplex antenna system array channel, need not the correction that accessory channel can be realized array channel, realizes flexible.The present invention also will provide a kind of device of realizing above-mentioned bearing calibration in intelligent antenna base station.
In order to solve above technical problem, the invention provides a kind of bearing calibration of time division duplex antenna system array channel, may further comprise the steps:
(a) front end of the first passage transceiver in array channel N relevant transceiver channel is provided with a switch matrix, realizes normal sending and receiving signal by the radio-frequency (RF) switch of switching in this switch matrix, perhaps is communicated with the state exchange of uplink and downlink corrected link;
(b) start up timing, passage is arranged on the given work carrier wave, known correction reference signal modulation is outputed to the first passage sender, be communicated with up corrected link, detect smart antenna known features signal and sampling behind the up described N collection of letters channel response when this work frequency ripple, preserve;
(c) receive the data and the known correction reference signal sequence of sampling according to described up timing again, employing asks related algorithm to calculate when described work carrier wave all up collection of letters passages with respect to the correction weights of first collection of letters passage, exports to base band up-downgoing wave beam and forms the module weighting and use;
(d) start descending timing, passage is arranged on the given work carrier wave, known correction reference signal is modulated successively the sender that outputs to a descending N passage, be communicated with descending corrected link, all detect smart antenna in this work frequently during ripple at every turn, known features signal and the sampling after the descending passage timesharing response of posting a letter of current correction, preserve by the first passage receiver;
(e) receive the data and the known correction reference signal sequence of sampling according to described descending timing again, employing asks related algorithm to calculate when described work carrier wave all descending passages of posting a letter with respect to the first correction weights of posting a letter passage, exports to base band up-downgoing wave beam and forms the module weighting and use.
Further, when adopting the uniform line-array antenna, described step (a) also can comprise step before: measure transmitted in both directions coefficient and preservation on the uplink and downlink working frequency range is respectively worked carrier wave between the inlet of coupling network in the uniform line-array antenna and each antenna inlet in advance, simultaneously, in described step (c) with (e), with behind the correction weights of described all passages of uplink and downlink and corresponding transmitted in both directions coefficient weighting in the lump, export to base band up-downgoing wave beam again and form the module weighting and use.
Further; in order to realize on-line correction; the bearing calibration of above-mentioned time division duplex antenna system array channel can have following characteristics: described step (b) and (d) in; be to start upstream or downstream when normally moving to proofread and correct, and the time slot of upstream or downstream correction work be limited to the idle time slot or the protection time slot of described work carrier wave in system.
Further, the bearing calibration of above-mentioned time division duplex antenna system array channel can have following characteristics: the related algorithm of asking of up calculation correction weights may further comprise the steps in the described step (c):
(c1) sequence data with known correction reference signal carries out related calculation with this correction signal receives sampling behind each collection of letters channel response data, obtains the process weights of up each passage;
(c2) be benchmark with first collection of letters passage, calculate the relative Amplitude phase inconsistency of other collection of letters passage with respect to first collection of letters passage;
(c3) obtain the inverse of the width of cloth phase inconsistency of this group collection of letters passage, be the correction weights of other collection of letters passage with respect to first collection of letters passage;
And the related algorithm of asking of descending calculation correction weights may further comprise the steps in the described step (e):
(e1) receive the data of sampling through each transmission channel response back by the receiver of first passage with the sequence data of known correction reference signal and this correction reference signal and carry out related calculation, obtain comprising the process weights of descending each passage of first passage receiver characteristic;
(e2) be benchmark with first passage of posting a letter, calculate other passage of posting a letter with respect to the first relative Amplitude phase inconsistency of posting a letter passage;
(e3) obtaining the post a letter inverse of width of cloth phase inconsistency of passage of this group is the 2nd～the N and posts a letter passage with respect to the first descending correction weights of posting a letter passage.
Further, in order to improve correction accuracy, the bearing calibration of above-mentioned time division duplex antenna system array channel can have following characteristics: described step (c1) and (e1) during the computational process weights, each process weights all is the average output by continuous 10 valid data.
Further, the bearing calibration of above-mentioned time division duplex antenna system array channel can have following characteristics: after described step (c) calculates the correction weights of each up collection of letters passage, the correctness of weights is proofreaied and correct in check earlier, form module as correctly outputing to base band up-downgoing wave beam again, otherwise system utilizes the up correction weights of last time that up collection of letters passage is weighted, then execution in step (d);
Simultaneously, after described step (e) calculates the correction weights of each descending passage of posting a letter, the correctness of weights is proofreaied and correct in check earlier, form module as correctly outputing to base band up-downgoing wave beam again, otherwise system utilizes the descending correction weights of last time that the descending passage of posting a letter is weighted.
The means for correcting of time division duplex antenna system array channel provided by the invention comprises the aerial array that becomes two-way circuit to connect successively, outdoor radio-frequency front-end, the relevant transceiver of multichannel, comprises baseband processing unit and base station main control unit that the up-downgoing wave beam forms module, the relevant transceiver of described multichannel is connected with described outdoor radio-frequency front-end by feeder cable, be connected with described aerial array by proofreading and correct cable, be characterized in:
The front end of first transceiver channel is provided with a switch matrix in the described multichannel transmitting-receiving letter machine, this switch matrix comprises a plurality of radiofrequency signal diverter switches, switch the transceiver channel that can be communicated with when the operate as normal between first passage transceiver and the radio-frequency front-end by switch, be communicated with the first passage sender and proofread and correct cable, first passage receiver and feeder cable at up timing, be communicated with first passage sender and feeder cable, second channel receiver and proofread and correct cable at descending timing;
Described baseband processing unit comprises the treatment for correcting module, and this treatment for correcting module further comprises process control unit, is used for the process control of up-downgoing corrected link; The signal modulating unit is used for the modulate emission control of up-downgoing correction signal; And data processing unit, be used for channel response signals sampling, algorithm process, weights checking and weights output.
Further, the means for correcting of above-mentioned time division duplex antenna system array channel can have following characteristics: described switch matrix includes first to the 4th radiofrequency signal diverter switch of three terminals, and 1,2 and No. 3 terminals of first diverter switch are connected to No. 2 terminals of first passage sender output, No. 2 terminals of the 4th diverter switch and second diverter switch respectively; 1, No. 3 terminals of second diverter switch are connected to the described feeder cable of first passage and No. 2 terminals of the 3rd diverter switch respectively; 1, No. 3 terminals of the 3rd diverter switch are connected to No. 3 terminals of first passage receiver input and the 4th diverter switch respectively; No. 1 terminals of the 4th diverter switch are connected to described correction cable.
Further, the means for correcting of above-mentioned time division duplex antenna system array channel can have following characteristics: also be connected with a downstream attenuation device between No. 2 terminals of described the first, the 4th diverter switch, also be connected with a up attenuator between No. 3 terminals of the 3rd, the 4th diverter switch.
Further, the means for correcting of above-mentioned time division duplex antenna system array channel can have following characteristics: described correction cable is the coupling network inlet that is connected to the uniform line-array antenna, perhaps is connected to the beacon antenna of even ring array antenna.
As from the foregoing, can realize the correction of TDD system intelligence antenna base station array channel amplitude, phase error according to method and apparatus of the present invention.And proofread and correct all circuit that comprised the up-downgoing passage, constitute corresponding corrected link flexibly by array channel and switch matrix conversion; Further, can also realize on-line correction, carry out and do not influence systematic function at the given idle time slot of antenna system or protection time slot; Algorithm is simple, the correction accuracy height; And at whole working frequency range, the up-downgoing passage can both be proofreaied and correct in real time.
Description of drawings
Fig. 1 is the structural representation of embodiment of the invention TD-SCDMA system intelligence antenna base station device.
Fig. 2 A and Fig. 2 B are respectively the structural representation of embodiment of the invention switch matrix under the uplink and downlink correcting state.
Fig. 3 A and Fig. 3 B are respectively the schematic diagrames of up, the descending corrected link that is made of switch matrix under the embodiment of the invention uplink and downlink correcting state.
Fig. 4 A and Fig. 4 B are TD-SCDMA system intelligence antenna base station bearing calibration flow charts of the present invention.
Embodiment
Fig. 1 is the structural representation that the embodiment of the invention has the TD-SCDMA system intelligence antenna base station device of real-time calibration function.As shown in the figure, this device mainly comprises aerial array 10, outdoor radio-frequency front-end 11, N passage relevant transceiver 14, baseband processing unit 15 and the base station main control unit 16 that becomes two-way circuit to connect successively.The relevant transceiver 14 of N passage is connected with outdoor radio-frequency front-end 11 by feeder cable 12, be connected with coupling network inlet in the aerial array 10 by proofreading and correct cable 13, present embodiment is example with the uniform line-array, is to be connected with correction beacon antenna inlet for even ring array.The relevant transceiver 14 of N passage props up the transceiver passage by N to be formed, and comprises that front end is provided with first transceiver channel 141 of switch matrix (this first transceiver channel can be selected any one in N the transceiver channel) and other 2-N transceiver channel 142.Baseband processing unit 15 comprises that the up-downgoing wave beam forms module 151 and treatment for correcting module 152, and this treatment for correcting module further comprises process control unit, is used for the process control of up-downgoing corrected link; The signal modulating unit is used for the modulate emission control of up-downgoing correction signal; And data processing unit, be used for channel response signals sampling, algorithm process, weights checking and weights output.
Described switch matrix is arranged on first passage transceiver and feeder cable, proofreaies and correct between the cable, and when the base station was normally moved, this switch matrix was finished the transmitting-receiving translation function; During the base station correction work, finish the formation of uplink downlink and the transmission of corrected link signal.
Fig. 2 A is the structural representation of the switch matrix of the first transceiver channel front end among Fig. 1.As shown in the figure, form by totally 4 radiofrequency signal diverter switch S1 ∽ S4, downstream attenuation device and up attenuators by first to the 4th for this switch matrix, each diverter switch has three terminals, and 1,2 and No. 3 terminals of first diverter switch are connected to No. 2 terminals of first passage sender output, downstream attenuation device input and second diverter switch respectively; 1,2, No. 3 terminals of second diverter switch are connected to No. 3 terminals of the feeder cable that is connected with outdoor radio-frequency front-end (two-way), first diverter switch and No. 2 terminals of the 3rd diverter switch respectively; 1,2, No. 3 terminals of the 3rd diverter switch are connected to No. 3 terminals of first passage receiver input, second diverter switch and the output of up attenuator respectively; 1,2, No. 3 terminals of the 4th diverter switch are connected to correction cable, downstream attenuation device output and the up attenuator input that is connected with coupling network inlet (two-way) in the antenna array respectively, but the present invention is not limited to the concrete connected mode among the embodiment.See from external interface and to have 4, an output that is connected to the first passage sender, an input that is connected to the first passage receiver, feeder cable by first passage is connected to outdoor radio-frequency front-end and is communicated to No. 1 interface of antenna of aerial array, and one is connected to the coupling network inlet by proofreading and correct cable.
Timing is provided with up-downgoing correction radiofrequency signal attenuator for the isolation of control transceiver channel signal, and the downstream attenuation device is adjusted the signal power of up timing first passage emission, and up attenuator is adjusted the power of descending timing first passage received signal.
4 kinds of operating states such as transmission of normal sending and receiving signal of diverter switch S1, S2, S3, S4 one-tenth capable of being combined under different switching states and uplink and downlink corrected link signal.And among Fig. 2 A, 1, No. 2 terminals of first diverter switch, 1, No. 3 terminals of second diverter switch, 1, No. 2 terminals of the 3rd diverter switch, 1, No. 2 terminals of the 4th diverter switch are communicated with, its residing position makes switch matrix be in up correcting state, has constituted the up corrected link that is communicated with.
Please be simultaneously with reference to the up corrected link shown in Fig. 3 A, by first passage sender TX 1, first diverter switch in the switch matrix, downstream attenuation device, the 4th diverter switch are proofreaied and correct cable, aerial array, the receiver RX of outdoor radio-frequency front-end (LNA and filter), feeder cable and up N passage being corrected 1-NConstitute.The data feedback channel response signal of importing the correction reference signal of up corrected link and obtaining after up corrected link conversion is by the treatment for correcting module invokes and the reception of baseband processing unit.Under up correcting state, the first passage sender is connected to the coupling network inlet, is in emission state, and first passage receiver and other passage receiver are in the state of complete reception together, and the sender of 2-N passage is in closed condition simultaneously.
And among Fig. 2 B, 1, No. 3 terminals of first diverter switch, 1, No. 2 terminals of second diverter switch, 1, No. 3 terminals of the 3rd diverter switch, 1, No. 3 terminals of the 4th diverter switch are communicated with, and its residing position is in switch matrix the first passage passage of posting a letter is carried out the descending correcting state of timing.
Please be simultaneously with reference to the descending corrected link shown in Fig. 3 B, by N passage sender TX 1-N, feeder cable, radio-frequency front-end, aerial array is proofreaied and correct cable, the 4th diverter switch of matrix switch, up attenuator, the 3rd diverter switch and first passage receiver RX 1Constitute.Correction reference signal and the down going channel response signal that obtains after descending corrected link conversion are also by treatment for correcting module invokes and reception.At descending timing, N passage is that order is proofreaied and correct, have only the sender of a passage to be in emission state at every turn, make the sender of next passage be in emission state again after this channel correcting is intact, receive and the down going channel response signal all is a receiver by first passage, other passage receiver is in closed condition.
Based on above system, the flow process among Fig. 4 A and Fig. 4 B has been described the method for whole N of array of smart antenna uplink and downlink transceiver channel correcting, may further comprise the steps.
Step 110, before system comes into operation, utilize vector network analyzer measure in advance coupling network inlet in the uniform line-array antenna enter the mouth with each antenna between transmitted in both directions coefficient when the uplink and downlink working frequency range is respectively worked carrier wave, and be stored in the treatment for correcting module;
Step 120 makes intelligent antenna base station system be in normal operating condition, and the base station main control unit triggers the treatment for correcting module and starts on-line correction;
Carry out the correction of up collection of letters passage earlier:
Step 130, a known array signal of treatment for correcting module invokes (correction reference signal) outputs to the first passage sender as modulation signal, passage is arranged on the work carrier wave, the time slot of correction work is limited to the idle time slot or the protection time slot of a carrier wave, and the initial frame number of correction is set;
Step 140 is provided with the diverter switch in the switch matrix, is communicated with up corrected link, and correction reference signal is changed through up corrected link, obtains the known features signal behind up all N collection of letters channel response;
This transfer process is: earlier correction reference signal is modulated through the first passage sender on given work carrier wave and correction work time slot, the signal of level is determined in output, through switch matrix, proofread and correct coupling network coupling, radio-frequency front-end in cable, the uniform line-array antenna, through N the collection of letters passage of feeder cable in the up collection of letters array that is corrected;
Step 150, known features signal behind up all N the collection of letters channel responses of detection smart antenna when the work carrier wave and sampling, preservation;
Step 160, employing asks related algorithm to draw the process weights of the up channel error of respectively collecting mail when the work carrier wave, calculate correction weights again with respect to first passage, each process weights is by 10 valid data (continuous 10 times process weights fluctuations, amplitude is less than ± 0.5dB, phase place is less than ± 5 °) average output, to improve the precision of proofreading and correct;
Step 170, check the correctness of each up collection of letters channel correcting weights, being about to these data feedback channel of proofreading and correct generation correction weights is weighted in each corresponding receive path transmission characteristic, repeating step 130～step 160, calculation correction weights once more, this moment, the relative error of data feedback channel answered amplitude less than ± 0.3dB, and phase place is less than ± 3 °; If correct, confirm that the result that step 160 produces is new correction weights (step 170a), and carry out next step; If incorrect, this up correction result is invalid, and will the last time correct up correction weights of system are as new correction weights (step 170b), and the record failure once and is carried out next step;
After finishing the correction of up collection of letters passage, carry out the correction of the descending passage of posting a letter, adopt same correction reference signal, working time slot and work carrier wave here:
Step 180, treatment for correcting module are provided with descending correction initial frame number, and determine the initial numbering of the down going channel of current correction, suppose to be numbered 1～N, initially are numbered 1;
Step 190 outputs to the sender of the down going channel of current correction with correction reference signal, and the diverter switch in the switch matrix is set, and is communicated with descending corrected link;
Step 200, correction reference signal is changed through descending corrected link, obtains the timesharing response of the descending passage of posting a letter of current correction;
This transfer process is: earlier with correction reference signal passage timesharing modulation of posting a letter through current correction on given work carrier wave and correction work time slot, the signal of level is determined in output, through the coupling of the coupling network in switch matrix, feeder cable, outdoor radio-frequency front-end, the uniform line-array antenna, calibrated cable is to the collection of letters passage of first passage;
Step 210, the receiver by first passage detect the known features signal (corresponding with the passage timesharing modulation output of posting a letter of current correction) after the descending passage timesharing response of posting a letter of smart antenna current correction when the work carrier wave, and sampling, preserve;
Step 220 judges whether that whole N down going channel has all detected to finish, if, carry out next step, otherwise, the down going channel numbering of current correction is added 1, next down going channel is proofreaied and correct, return step 190;
Step 230, adopt related algorithm to draw the process weights of the descending channel error of respectively posting a letter when the work carrier wave, calculate correction weights again with respect to first passage, each process weights is by (the continuous 10 times process weights fluctuation of continuous 10 valid data, amplitude is less than ± 0.5dB, phase place is less than ± 5 °) average output, to improve the precision of proofreading and correct;
Step 240, check the correctness of each descending channel correcting weights of posting a letter, being about to these down going channel of proofreading and correct generation correction weights is weighted in each corresponding receive path transmission characteristic, repeating step 180～step 230, calculation correction weights once more, this moment, the relative error of down going channel answered amplitude less than ± 0.3dB, and phase place is less than ± 3 °; If correct, confirm that the result that step 230 produces is new descending correction weights (step 240a), and carry out next step; If incorrect, this descending correction result is invalid, and will the last time correct descending correction weights of system are as new correction weights (step 240b), and the record failure once and is carried out next step;
Step 250, the treatment for correcting module is sent into correction weights and coupling network in uniform line-array antenna the transmitted in both directions coefficient during at this work carrier wave of a uplink and downlink N passage when the given work carrier wave up-downgoing wave beam after the weighting in the lump and is formed module, weighting is used when keeping supplying downlink wave beam formation, and a up-downgoing is proofreaied and correct and finished.
The flow process of operation Fig. 4 when different work carrier waves, the correction of array channel in the time of just can finishing each work carrier wave of smart antenna.
If adopt even ring array,, just do not need the test in advance of step 110, and in step 250, need not the transmission coefficient of coupling network uplink and downlink is compensated to the channel correcting weights yet because its geometric center is provided with the beacon antenna of proofreading and correct usefulness.In addition, in step 140 and step 200, correction reference signal is that calibrated beacon antenna is presented by antenna array is empty, but not is coupled through coupling network.
In addition, above-mentioned up correction and descending correction can independently be carried out respectively, also can finish as above-mentioned embodiment together.
Up correction weights in the step 160 ask related algorithm as follows: the data feedback channel process weights (being the inconsistency of passage) of establishing array channel are respectively C Mr1, C Mr2..., C MrN, the relative Amplitude phase inconsistency of data feedback channel is w R1, w R2..., w RNThe correction reference signal of first passage emission is Tx, and Tx is the known array of a m position, gets passage number N=4, then has:
Respond after the data of reception sampling are respectively by four receive paths that are corrected:
R x1＝T x·C mr1
R x2＝T x·C mr2
R x3＝T x·C mr3
R x4＝T x·C mr4
The concrete steps of calculating are as follows, at first carry out related calculation with known Tx data and reception data, try to achieve the process weights of each data feedback channel:
Corr 1 = 1 N Σ k = 1 N R x 1 k · ( T xk ) H = C mr 1
Corr 2 = 1 N Σ k = 1 N R x 2 k · ( T xk ) H = C mr 2
Corr 3 = 1 N Σ k = 1 N R x 3 k · ( T xk ) H = C mr 3
Corr 4 = 1 N Σ k = 1 N R x 4 k · ( T xk ) H = C mr 4
Be benchmark with first collection of letters passage then, calculate the relative Amplitude phase inconsistency of other collection of letters passage with respect to first collection of letters passage:
w r1＝C mr1/C mr1＝1
w r2＝C mr2/C mr1＝C mr2′
w r3＝C mr3/C mr1＝C mr3′
w r4＝C mr4/C mr1＝C mr4′
Obtain w R2～w R4Inverse be the correction weights of second～the 4th collection of letters passage with respect to first collection of letters passage.Above principle can expand to N phase dry passage.
The related algorithm step of asking of the descending correction weights in the step 230 comprises:
Receive the data of sampling through each transmission channel response back by the receiver of first passage with known Tx data and correction reference signal and carry out related calculation, obtain comprising the process weights of descending each passage of first passage receiver characteristic;
With first passage of posting a letter is benchmark, calculates other passage of posting a letter with respect to the first relative Amplitude phase inconsistency of posting a letter passage;
Obtaining the post a letter inverse of width of cloth phase inconsistency of passage of this group is the 2nd～the N and posts a letter passage with respect to the first descending correction weights of posting a letter passage.
Descending algorithm principle is identical with last line algorithm, each correction of the process weights of each passage of posting a letter of present embodiment also is by (the continuous 10 times process weights fluctuation of continuous 10 valid data, amplitude is less than ± 0.5dB, and phase place is less than ± 5 °) average output, to improve the precision of proofreading and correct.
In sum, the present invention is in the base station system normal course of operation, can start correction in real time, passage detects the signal response of each sending and receiving letter passage of the up-downgoing of known correction reference signal when given work carrier wave, employing asks relevant algorithm computation to go out to proofread and correct weights, exports to base band up-downgoing wave beam formation module and is weighted.
Method of the present invention also is suitable for for PHS system (personal handyphone system) and waits other to adopt the correction of the intelligent antenna base station array channel of TDD working method.

Claims (10)

1, a kind of bearing calibration of time division duplex antenna system array channel may further comprise the steps:
(a) front end of the first passage transceiver in array channel N relevant transceiver channel is provided with a switch matrix, realizes normal sending and receiving signal by the radio-frequency (RF) switch of switching in this switch matrix, perhaps is communicated with the state exchange of uplink and downlink corrected link;
(b) start up timing, passage is arranged on the given work carrier wave, the modulation of known correction reference signal is outputed to the first passage sender, be communicated with up corrected link, detect smart antenna in this work known features signal behind up N collection of letters channel response and sampling, preservation during ripple frequently;
(c) receive the data and the known correction reference signal sequence of sampling according to described up timing again, employing asks related algorithm to calculate when described work carrier wave all up collection of letters passages with respect to the correction weights of first collection of letters passage, exports to base band up-downgoing wave beam and forms the module weighting and use;
(d) start descending timing, passage is arranged on the given work carrier wave, known correction reference signal is modulated successively the sender that outputs to a descending N passage, be communicated with descending corrected link, all detect smart antenna in this work frequently during ripple at every turn, known features signal and the sampling after the descending passage timesharing response of posting a letter of current correction, preserve by the first passage receiver;
(e) receive the data and the known correction reference signal sequence of sampling according to described descending timing again, employing asks related algorithm to calculate when described work carrier wave all descending passages of posting a letter with respect to the first correction weights of posting a letter passage, exports to base band up-downgoing wave beam and forms the module weighting and use.
2, bearing calibration as claimed in claim 1, it is characterized in that, when adopting the uniform line-array antenna, described step (a) also comprises step before: measure transmitted in both directions coefficient and preservation on the uplink and downlink working frequency range is respectively worked carrier wave between the inlet of coupling network in the uniform line-array antenna and each antenna inlet in advance, simultaneously, in described step (c) with (e), with behind the correction weights of described all passages of uplink and downlink and corresponding transmitted in both directions coefficient weighting in the lump, export to base band up-downgoing wave beam again and form the module weighting and use.
3, bearing calibration as claimed in claim 1; it is characterized in that; described step (b) and (d) in, be to start upstream or downstream when normally moving to proofread and correct, and the time slot of upstream or downstream correction work be limited to the idle time slot or the protection time slot of described work carrier wave in system.
4, bearing calibration as claimed in claim 1 is characterized in that, the related algorithm of asking of up calculation correction weights may further comprise the steps in the described step (c):
(c1) sequence data with known correction reference signal carries out related calculation with this correction signal receives sampling behind each collection of letters channel response data, obtains the process weights of up each passage;
(c2) be benchmark with first collection of letters passage, calculate the relative Amplitude phase inconsistency of other collection of letters passage with respect to first collection of letters passage;
(c3) obtain the inverse of the width of cloth phase inconsistency of this group collection of letters passage, be the correction weights of other collection of letters passage with respect to first collection of letters passage;
And the related algorithm of asking of descending calculation correction weights may further comprise the steps in the described step (e):
(e1) receive the data of sampling through each transmission channel response back by the receiver of first passage with the sequence data of known correction reference signal and this correction reference signal and carry out related calculation, obtain comprising the process weights of descending each passage of first passage receiver characteristic;
(e2) be benchmark with first passage of posting a letter, calculate other passage of posting a letter with respect to the first relative Amplitude phase inconsistency of posting a letter passage;
(e3) obtaining the post a letter inverse of width of cloth phase inconsistency of passage of this group is the 2nd to N and posts a letter passage with respect to the first descending correction weights of posting a letter passage.
5, bearing calibration as claimed in claim 4 is characterized in that, described step (c1) and (e1) during the computational process weights, and each process weights all is the average output by continuous 10 valid data.
6, bearing calibration as claimed in claim 1, it is characterized in that, after described step (c) calculates the correction weights of each up collection of letters passage, the correctness of weights is proofreaied and correct in check earlier, output to base band up-downgoing wave beam formation module again as correctly being recorded as new correction weights, otherwise system utilizes the up correction weights of last time that up collection of letters passage is weighted, then execution in step (d);
Simultaneously, after described step (e) calculates the correction weights of each descending passage of posting a letter, the correctness of weights is proofreaied and correct in check earlier, output to base band up-downgoing wave beam formation module again as correctly being recorded as new correction weights, otherwise system utilizes the descending correction weights of last time that the descending passage of posting a letter is weighted.
7, a kind of means for correcting of time division duplex antenna system array channel, comprise the aerial array that becomes two-way circuit to connect successively, outdoor radio-frequency front-end, the relevant transceiver of multichannel, comprise baseband processing unit and base station main control unit that the up-downgoing wave beam forms module, the relevant transceiver of described multichannel is connected with described outdoor radio-frequency front-end by feeder cable, be connected with described aerial array by proofreading and correct cable, it is characterized in that:
The front end of first transceiver channel is provided with a switch matrix in the relevant transceiver of described multichannel, this switch matrix comprises a plurality of radiofrequency signal diverter switches, switch the transceiver channel that can be communicated with when the operate as normal between first passage transceiver and the radio-frequency front-end by switch, be communicated with the first passage sender and proofread and correct cable, first passage receiver and feeder cable at up timing, be communicated with first passage sender and feeder cable, second channel receiver and proofread and correct cable at descending timing;
Described baseband processing unit comprises the treatment for correcting module, and this treatment for correcting module further comprises process control unit, is used for the process control of up-downgoing corrected link; The signal modulating unit is used for the modulate emission control of up-downgoing correction signal; And data processing unit, be used for channel response signals sampling, algorithm process, weights checking and weights output.
8, means for correcting as claimed in claim 7, it is characterized in that, described switch matrix includes first to the 4th radiofrequency signal diverter switch of three terminals, and 1,2 and No. 3 terminals of first diverter switch are connected to No. 2 terminals of first passage sender output, No. 2 terminals of the 4th diverter switch and second diverter switch respectively; 1, No. 3 terminals of second diverter switch are connected to the described feeder cable of first passage and No. 2 terminals of the 3rd diverter switch respectively; 1, No. 3 terminals of the 3rd diverter switch are connected to No. 3 terminals of first passage receiver input and the 4th diverter switch respectively; No. 1 terminals of the 4th diverter switch are connected to described correction cable.
9, means for correcting as claimed in claim 8 is characterized in that, also is connected with a downstream attenuation device between No. 2 terminals of described the first, the 4th diverter switch, also is connected with a up attenuator between No. 3 terminals of the 3rd, the 4th diverter switch.
10, means for correcting as claimed in claim 7 is characterized in that, described correction cable is the coupling network inlet that is connected to the uniform line-array antenna, perhaps is connected to the beacon antenna of even ring array antenna.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0893703A1 (en) * 1997-06-24 1999-01-27 Space Engineering S.P.A. Digital bi - static spread spectrum radar
CN1388668A (en) * 2001-05-25 2003-01-01 华为技术有限公司 Intelligent antenna channel array correcting method and device
CN1430823A (en) * 2000-05-23 2003-07-16 日本电气株式会社 Calibration system for array antenna receiving apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0893703A1 (en) * 1997-06-24 1999-01-27 Space Engineering S.P.A. Digital bi - static spread spectrum radar
CN1430823A (en) * 2000-05-23 2003-07-16 日本电气株式会社 Calibration system for array antenna receiving apparatus
CN1388668A (en) * 2001-05-25 2003-01-01 华为技术有限公司 Intelligent antenna channel array correcting method and device

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