CN105527516A - Channel calibration method and electronic device - Google Patents
Channel calibration method and electronic device Download PDFInfo
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Abstract
The invention discloses a channel calibration method and an electronic device. The channel calibration method comprises following steps: M sample signals corresponding to N channels are collected, wherein each of the M sample signals comprises a composite signal of calibrating signals passing through the N channels, N is an integer larger than zero, and M is an integer larger than N; the M sample signals are fitted by using a preset strategy to obtain signal amplitude phase offset value of each of the N channels; the N channels are calibrated on the basis of the signal amplitude phase offset value of each of the N channels. By use of the method, the technical problems of complicated channel calibration methods and high cost existing in the prior art are solved.
Description
Technical field
The present invention relates to electronic technology field, particularly a kind of channel calibration method and electronic equipment.
Background technology
Phased array antenna is as a kind of Novel electric scanning antenna, phase place and the amplitude of antenna feed electric current is changed by controlling phase shifter in each antenna element passage and attenuator, reach the object of beam scanning, owing to there is beam position and change of shape is rapid, directive gain is high, be easy to the advantages such as implementation space AF panel, be more and more subject to people's attention and be widely used in Practical Project field.But the important indicators such as the minor level of phased array antenna, beam position, beam angle and null depth are easily subject to multifactorial impact perhaps, as: the factor such as phase shifter error, rigging error, manufacturing tolerance, impedance mismatch, antenna thermal deformation, these factors will cause the feed amplitude of each unit channel of phased array antenna and the inconsistency of phase place.Therefore, research phased array antenna collimation technique, ensures the consistance of each passage width phase, and to the indices ensureing antenna system, the actual performance improving antenna has important theoretical and practical significance.
In the prior art, in order to realize the calibration of amplitude and phase of each passage to phased array antenna, need the amplitude and the phase value that detect and calculate each passage.For the antenna of antenna element negligible amounts, can be each channels designs actuating switch and load, and carry out independent detection.But along with the increase of antenna element quantity, for each passage configures actuating switch and load down hardware design burden, and, need when calibrating to test each passage separately, cause calibration operation amount larger, so, there is calibrate mode in prior art complicated, and the technical matters that required cost is higher.
Summary of the invention
The embodiment of the present application provides a kind of channel calibration method and electronic equipment, there is calibrate mode complexity for solving in prior art, and the technical matters that required cost is higher.
The embodiment of the present invention provides a kind of calibrate on the one hand, comprising:
Gather M the sample signal corresponding with N number of passage, wherein, in a described M sample signal, each sample signal comprises the signal of calibrating signal by synthesizing after each passage in described N number of passage, N be greater than 0 integer, M is the integer being greater than N;
With preset strategy, matching is carried out to a described M sample signal, obtain the signal width phase deviation value of each passage in described N number of passage;
Based on the signal width phase deviation value of each passage in described N number of passage, to described N number of calibrate.
Optionally, M the sample signal that described collection is corresponding with N number of passage, specifically comprises:
Obtain the M group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described M group phase shift value, in described M group phase shift value, each group phase shift value is different;
Getting i is successively 1 to M, when the phase shift value of described N number of passage is adjusted to i-th group of phase shift value in described M group phase shift value, obtains i-th sample signal of described calibrating signal by synthesizing after described N number of passage;
When i is M, obtain M sample signal.
Optionally, M the sample signal that described collection is corresponding with N number of passage, specifically comprises:
Obtain the L group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described L group phase shift value, in described L group phase shift value, each group phase shift value is different, and L is the integer being greater than M;
Getting j is successively 1 to L, when the phase shift value of described N number of passage is adjusted to the jth group phase shift value in described L group phase shift value, obtains jth the sample signal of described calibrating signal by synthesizing after described N number of passage;
When j is L, obtain L sample signal;
A random selecting M sample signal from a described L sample signal.
Optionally, after described acquisition L sample signal, described method also comprises:
Based on a described L sample signal, determine K group sample signal, often organize sample signal and all comprise M sample signal in described K group sample signal, M the sample signal that often group comprises is the sample signal from described L sample signal random selecting, K be greater than 1 integer;
Getting t is successively 1 to K, carries out matching with described preset strategy to M sample signal in t group sample signal, obtains the t group parameter value corresponding with the signal width phase deviation value of each passage in described N number of passage; When t is K, obtain K group parameter value;
N number of value is determined, the signal width phase deviation value of each passage in the corresponding described N number of passage of described N number of value from described K group parameter value.
Optionally, describedly with preset strategy, matching is carried out to a described M sample signal, is specially:
In linear regression mode, matching is carried out to a described M sample signal; Or
In robustness regression mode, matching is carried out to a described M sample signal; Or
In ridge regression mode, matching is carried out to a described M sample signal.
The embodiment of the present invention provides a kind of electronic equipment on the other hand, comprising:
Signal picker, for gathering the M corresponding with a N number of passage sample signal, wherein, in a described M sample signal, each sample signal comprises the signal of calibrating signal by synthesizing after each passage in described N number of passage, N be greater than 0 integer, M is the integer being greater than N;
Storage unit, for storing at least one program module;
At least one processor, at least one processor described, by obtaining and running at least one program module described, for carrying out matching with preset strategy to a described M sample signal, obtains the signal width phase deviation value of each passage in described N number of passage; Based on the signal width phase deviation value of each passage in described N number of passage, to described N number of calibrate.
Optionally, described signal picker specifically for:
Obtain the M group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described M group phase shift value, in described M group phase shift value, each group phase shift value is different;
Getting i is successively 1 to M, when the phase shift value of described N number of passage is adjusted to i-th group of phase shift value in described M group phase shift value, obtains i-th sample signal of described calibrating signal by synthesizing after described N number of passage;
When i is M, obtain M sample signal.
Optionally, described signal picker specifically for:
Obtain the L group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described L group phase shift value, in described L group phase shift value, each group phase shift value is different, and L is the integer being greater than M;
Getting j is successively 1 to L, when the phase shift value of described N number of passage is adjusted to the jth group phase shift value in described L group phase shift value, obtains jth the sample signal of described calibrating signal by synthesizing after described N number of passage;
When j is L, obtain L sample signal;
A random selecting M sample signal from a described L sample signal.
Optionally, signal picker specifically for:
After described acquisition L sample signal, based on a described L sample signal, determine K group sample signal, often organize sample signal in described K group sample signal and all comprise M sample signal, M the sample signal that often group comprises is the sample signal from described L sample signal random selecting, K be greater than 1 integer;
Getting t is successively 1 to K, carries out matching with described preset strategy to M sample signal in t group sample signal, obtains the t group parameter value corresponding with the signal width phase deviation value of each passage in described N number of passage; When t is K, obtain K group parameter value;
N number of value is determined, the signal width phase deviation value of each passage in the corresponding described N number of passage of described N number of value from described K group parameter value.
Optionally, at least one processor described also for:
In linear regression mode, matching is carried out to a described M sample signal; Or
In robustness regression mode, matching is carried out to a described M sample signal; Or
In ridge regression mode, matching is carried out to a described M sample signal.
Above-mentioned one or more technical scheme in the embodiment of the present application, at least has one or more technique effects following:
1, due in technical scheme in the embodiment of the present application, have employed and gather M the sample signal corresponding with N number of passage, wherein, in a described M sample signal, each sample signal comprises the signal of calibrating signal by synthesizing after each passage in described N number of passage, N be greater than 0 integer, M is the integer being greater than N; With preset strategy, matching is carried out to a described M sample signal, obtain the signal width phase deviation value of each passage in described N number of passage; Based on the signal width phase deviation value of each passage in described N number of passage, to the technological means of described N number of calibrate.Like this, when needs are calibrated multiple passage, only need to collect the multiple sample signals corresponding with these passages, again the signal width phase deviation value that matching can obtain each passage is carried out to these sample signals, do not need for any assisted calibration hardware circuit of channels designs, only adopt software processing mode can calculate the signal width phase deviation value of each passage.So, effectively can solve in prior art that to there is calibrate mode complicated, and the technical matters that required cost is higher, provide a kind of simple and calibrate mode of low cost.
2, due in technical scheme in the embodiment of the present application, have employed based on a described L sample signal, determine K group sample signal, often organize sample signal in described K group sample signal and all comprise M sample signal, M the sample signal that often group comprises is the sample signal from described L sample signal random selecting, K be greater than 1 integer; Getting t is successively 1 to K, carries out matching with described preset strategy to M sample signal in t group sample signal, obtains the t group parameter value corresponding with the signal width phase deviation value of each passage in described N number of passage; When t is K, obtain K group parameter value; N number of value is determined, the technological means of the signal width phase deviation value of each passage in the corresponding described N number of passage of described N number of value from described K group parameter value.Like this, electronic equipment is when collecting multiple sample signal about passage, many group samples can be selected to carry out matching, and then the signal width phase deviation value of each passage in multiple passage is determined by the multiple fitting results obtained, can when there is error in phase shifter, obtain the signal width phase deviation value of accurate each passage, ensure that the accuracy of calibrate.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described by the accompanying drawing used required in describing embodiment below, apparently, the accompanying drawing in the following describes is only some embodiments of the present invention.
The process flow diagram of a kind of radio-frequency channel real-time calibration method that Fig. 1 provides for the embodiment of the present application one;
The active phase array antenna receiving cable calibration block diagram that Fig. 2 provides for the embodiment of the present application two;
The structural representation of a kind of electronic equipment that Fig. 3 provides for the embodiment of the present application three.
Embodiment
The embodiment of the present application provides a kind of channel calibration method and electronic equipment, there is calibrate mode complexity for solving in prior art, and the technical matters that required cost is higher.
For solving above-mentioned technical matters, the embodiment of the present invention provides a kind of channel calibration method, and general thought is as follows:
Gather M the sample signal corresponding with N number of passage, wherein, in a described M sample signal, each sample signal comprises the signal of calibrating signal by synthesizing after each passage in described N number of passage, N be greater than 0 integer, M is the integer being greater than N;
With preset strategy, matching is carried out to a described M sample signal, obtain the signal width phase deviation value of each passage in described N number of passage;
Based on the signal width phase deviation value of each passage in described N number of passage, to described N number of calibrate.
Due in technical scheme in the embodiment of the present application, have employed and gather M the sample signal corresponding with N number of passage, wherein, in a described M sample signal, each sample signal comprises the signal of calibrating signal by synthesizing after each passage in described N number of passage, N be greater than 0 integer, M is the integer being greater than N; With preset strategy, matching is carried out to a described M sample signal, obtain the signal width phase deviation value of each passage in described N number of passage; Based on the signal width phase deviation value of each passage in described N number of passage, to the technological means of described N number of calibrate.Like this, when needs are calibrated multiple passage, only need to collect the multiple sample signals corresponding with these passages, again the signal width phase deviation value that matching can obtain each passage is carried out to these sample signals, do not need for any assisted calibration hardware circuit of channels designs, only adopt software processing mode can calculate the signal width phase deviation value of each passage.So, effectively can solve in prior art that to there is calibrate mode complicated, and the technical matters that required cost is higher, provide a kind of simple and calibrate mode of low cost.
In order to better understand technique scheme, below by accompanying drawing and specific embodiment, technical scheme is described in detail, the specific features being to be understood that in the embodiment of the present application and embodiment is the detailed description to technical scheme, instead of the restriction to technical scheme, when not conflicting, the technical characteristic in the embodiment of the present application and embodiment can be combined with each other.
Embodiment one
Please refer to Fig. 1, be a kind of channel calibration method that the embodiment of the present application one provides, comprise:
S101: gather M the sample signal corresponding with N number of passage, wherein, in a described M sample signal, each sample signal comprises the signal of calibrating signal by synthesizing after each passage in described N number of passage, N be greater than 0 integer, M is the integer being greater than N;
S102: carry out matching to a described M sample signal with preset strategy, obtains the signal width phase deviation value of each passage in described N number of passage;
S103: based on the signal width phase deviation value of each passage in described N number of passage, to described N number of calibrate.
Wherein, describedly with preset strategy, matching is carried out to a described M sample signal, be specially: in linear regression mode, matching is carried out to a described M sample signal; Or in robustness regression mode, matching is carried out to a described M sample signal; Or in ridge regression mode, matching is carried out to a described M sample signal.
Concrete, in the present embodiment, when needing the array channel of pair array antenna type to calibrate, first need to place a signal source in corresponding position, after the calibrating signal that N number of channel reception sends to signal source, by signal syntheses signal corresponding for N number of passage, when collecting M the sample signal corresponding to N number of passage, the phase relation that matching obtains sample signal change and each passage is carried out to M sample signal, and then the signal width phase deviation value of each passage can be calculated.Number due to the sample signal chosen is greater than the number of passage, so, by after M sample point matching, the signal width phase deviation value of each passage can be obtained.Such as: when the far field calibration carrying out active phase array antenna receiving cable, a signal source is placed in receiving antenna 0 ° of direction, adjust the phase shift value of each receiving cable, the composite signal received will change, and then M sample signal can be collected, and then the phase relation that matching obtains sample signal change and each passage is carried out to M sample signal, and then the signal width phase deviation value of each receiving cable can be calculated.Further, this channel calibration method can also be applied to the far field calibration of active phase array antenna transmission channel.In specific implementation process, can select linear regression mode, robustness regression mode or ridge regression mode to the fit approach of sample point, certainly can also adopt other fit approach, at this, the application is not construed as limiting.
By such mode, when needs are calibrated multiple passage, only need to collect the multiple sample signals corresponding with these passages, again the signal width phase deviation value that matching can obtain each passage is carried out to these sample signals, do not need for any assisted calibration hardware circuit of channels designs, only adopt software processing mode can calculate the signal width phase deviation value of each passage.So, effectively can solve in prior art that to there is calibrate mode complicated, and the technical matters that required cost is higher, provide a kind of simple and calibrate mode of low cost.
Further, in the present embodiment, gather M the sample signal corresponding with N number of passage, mainly realize by following two kinds of modes:
First kind of way
Obtain the M group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described M group phase shift value, in described M group phase shift value, each group phase shift value is different;
Getting i is successively 1 to M, when the phase shift value of described N number of passage is adjusted to i-th group of phase shift value in described M group phase shift value, obtains i-th sample signal of described calibrating signal by synthesizing after described N number of passage;
When i is M, obtain M sample signal.
Concrete, in the present embodiment, the sample signal gathered is needed to be greater than channel number, need to be provided with phase shifter in each passage in N number of passage of calibration, by regulating the value of each phase shifter, when the calibrating signal that signal source sends is by N number of passage that phase shift value is different, M sample signal can be obtained.Such as: the passage that need calibrate has 3, each passage is provided with phase shifter, can regulate the value of the phase shifter of each passage respectively, when the phase shift value of first passage, second channel, third channel is set to a1, a2, a3 respectively, calibrating signal is by composite signal A after first passage, second channel, third channel; When the phase shift value of first passage, second channel, third channel is set to b1, b2, b3 respectively, calibrating signal is by composite signal B after first passage, second channel, third channel, when the phase shift value of first passage, second channel, third channel is set to c1, c2, c3 respectively, calibrating signal is by composite signal C after first passage, second channel, third channel; When the phase shift value of first passage, second channel, third channel is set to d1, d2, d3 respectively, calibrating signal is by composite signal D after first passage, second channel, third channel, and then signal A, signal B, signal C, signal D are sample signal.
The second way
Obtain the L group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described L group phase shift value, in described L group phase shift value, each group phase shift value is different, and L is the integer being greater than M;
Getting j is successively 1 to L, when the phase shift value of described N number of passage is adjusted to the jth group phase shift value in described L group phase shift value, obtains jth the sample signal of described calibrating signal by synthesizing after described N number of passage;
When j is L, obtain L sample signal;
A random selecting M sample signal from a described L sample signal.
Concrete, in the present embodiment, the sample signal gathered is needed to be greater than channel number, need to be provided with phase shifter in each passage in N number of passage of calibration, by regulating the value of each phase shifter, when the calibrating signal that signal source sends is by N number of passage that phase shift value is different, M sample signal can be obtained.When obtaining M sample signal, after can a little sample signal being gathered more, a random selecting M sample signal.Such as: the passage that need calibrate has 3, each passage is provided with phase shifter, can regulate the value of the phase shifter of each passage respectively, when the phase shift value of first passage, second channel, third channel is set to a1, a2, a3 respectively, calibrating signal is by composite signal A after first passage, second channel, third channel; When the phase shift value of first passage, second channel, third channel is set to b1, b2, b3 respectively, calibrating signal is by composite signal B after first passage, second channel, third channel, when the phase shift value of first passage, second channel, third channel is set to c1, c2, c3 respectively, calibrating signal is by composite signal C after first passage, second channel, third channel; When the phase shift value of first passage, second channel, third channel is set to d1, d2, d3 respectively, calibrating signal is by composite signal D after first passage, second channel, third channel; When the phase shift value of first passage, second channel, third channel is set to e1, e2, e3 respectively, calibrating signal is by composite signal E after first passage, second channel, third channel.And then, when M is 4, can from signal A, signal B, signal C, signal D, signal E random selecting 4 signals as the sample signal for matching.
In order to obtain more accurate calibration result, when collecting sample signal adopts the above-mentioned second way, in step: after obtaining L sample signal, described method also comprises:
Based on a described L sample signal, determine K group sample signal, often organize sample signal and all comprise M sample signal in described K group sample signal, M the sample signal that often group comprises is the sample signal from described L sample signal random selecting, K be greater than 1 integer;
Getting t is successively 1 to K, carries out matching with described preset strategy to M sample signal in t group sample signal, obtains the t group parameter value corresponding with the signal width phase deviation value of each passage in described N number of passage; When t is K, obtain K group parameter value;
N number of value is determined, the signal width phase deviation value of each passage in the corresponding described N number of passage of described N number of value from described K group parameter value.
Concrete, in the present embodiment, due in the process of collecting sample signal, when regulating the value of phase shifter of a passage, may deviation be there is, such as: the value of the passage phase shifter that setting regulates is 2 degree, but the value that actual phase shifter regulates is 2.5 degree.Therefore, can adopt after matching is carried out on many group sample signals and obtain the mode of the signal width phase deviation value of final individual each passage to reduce the impact of error on calibration accuracy of phase shifter, make calibration data true and accurate more.Such as: the passage needing calibration is first passage, second channel, third channel, amount to 3 passages, the sample signal corresponding with these 3 passages gathered has A, B, C, D, E, F totally 6 sample signals, when needs carry out matching 3 times with 4 sample signals, matching can be carried out from these 6 sample signal kind Stochastic choice 4 of A, B, C, D, E, F, supposing that the sample signal chosen for the 1st time is A, B, C, D, is d1, d2, d3 by obtaining with first passage, second channel, signal width phase deviation value that third channel is corresponding to A, B, C, D matching.Further, supposing that the sample signal chosen for the 2nd time is A, B, C, E, is r1, r2, r3 by obtaining with first passage, second channel, signal width phase deviation value that third channel is corresponding to A, B, C, E matching; Supposing that the sample signal chosen for the 3rd time is A, C, E, F, is t1, t2, t3 by obtaining with first passage, second channel, signal width phase deviation value that third channel is corresponding to A, C, E, F matching.
And then, the signal width phase deviation value obtained about first passage by 3 matchings is d1, r1, t1, the intermediate value can chosen in d1, r1, t1 is used as the signal width phase deviation value of first passage, as: as d1<r1<t1, choose the signal width phase deviation value of r1 as first passage.In like manner, the signal width phase deviation value obtained about second channel by 3 matchings is d2, r2, t2, the intermediate value can chosen in d2, r2, t2 is used as the signal width phase deviation value of second channel, as: as d2<t2<r2, choose the signal width phase deviation value of t2 as second channel.In like manner, the signal width phase deviation value obtained about third channel by 3 matchings is d3, r3, t3, the intermediate value can chosen in d3, r3, t3 is used as the signal width phase deviation value of third channel, as: as t3<d3<r3, choose the signal width phase deviation value of d3 as third channel.So what finally determine is r1, t2, d3 with first passage, second channel, signal width phase deviation value that third channel is corresponding.
Certainly, in specific implementation process, determine that the mode of final signal width phase deviation value is not limited to the mode choosing intermediate value in above-mentioned example the fitting result of the signal width phase deviation value of the multiple passages about passage obtained from repeatedly matching, can also adopt the mode of the mean value of multiple fitting result as final signal width phase deviation value, or, choose value that in multiple fitting result, mean square deviation the is minimum mode etc. as final signal width phase deviation value, at this, the application is not construed as limiting.By such mode, electronic equipment is when collecting multiple sample signal about passage, many group samples can be selected to carry out matching, and then the signal width phase deviation value of each passage in multiple passage is determined by the multiple fitting results obtained, can when there is error in phase shifter, obtain the signal width phase deviation value of accurate each passage, ensure that the accuracy of calibrate.
Embodiment two
The present embodiment is calibrated to example with antenna receiving cable far field, is described in detail to the implementation detail of the channel calibration method of the application.
Fig. 2 gives active phase array antenna receiving cable far field calibration block diagram, its hardware composition mainly comprises antenna element, TR assembly, sum-difference network, phase shifter, receiver and signal source, and the channel calibration method in the present embodiment carries out the collection of sample signal under this framework.Specifically, signal source is placed on 0 ° of direction of receiving antenna, and when signal source produces calibrating signal x, because signal source is in receiving antenna 0 ° of direction, then the signal x amplitude-phase being fed to each receiving cable is identical.Calibrating signal produces amplitude fading in various degree and phase shift through each receiving cable and phase shifter, if a (i) is the width phase deviation of i-th passage, c (i) is the phase shifter values of i-th passage, then the output signal of i-th passage is:
s(i)＝c(i)·a(i)·x(1)
Wherein c (i), a (i), x and s (i) are complex signal, comprise amplitude and the phase information of signal." " represents the multiplication of plural number, and s (i) is i-th multi-channel output signal.Whole calibration operation needs signal width phase deviation value a (i) estimating each passage.Owing to being only concerned about the relative value of each passage width phase deviation, also can direct estimation a (i) x as calibration foundation, in order to express easily use b (i) to substitute a (i) x, then the output signal of i-th passage is expressed as:
s(i)＝c(i)·b(i)(2)
Each receiving cable signal delivers to sum-difference network, and passage exports the synthesis being each receiving cable signal, then obtains and channel signal y through receiver detection, has:
Wherein N is the channel number of active phase array antenna.Formula (2) is substituted into formula (3) have:
In above formula, c (i) is the value of the phase shifter of the i-th receiving cable, and y is that receiver detection obtains and channel signal, is given value.Y changes with the adjustment of c (i), in the present embodiment, by repeatedly adjusting the phase shifter values c (i) of each passage, and recording corresponding composite signal y, obtaining multiple sample signal.Specifically, c is remembered
ji () is the phase shifter values of jth time adjustment the i-th paths, y
jfor j detected signal value, then define the vectorial P of a N+1 dimension
j=[c
j(1), c
j(2) ..., c
j(N), y
j] be a jth sample.For stating conveniently, supposing to acquire altogether M sample point, being designated as
Further, utilize Hyperplane fit sample point, if c (i) is regarded as independent variable, y regards dependent variable as, then above-mentioned formula (4) is a lineoid equation, the parameter that b (i) is lineoid.Again due to the signal width phase deviation value that b (i) is each receiving cable, immobilize, linear regression algorithm therefore can be adopted to carry out matching to multiple sample, estimate the parameter b (i) obtaining lineoid, i=1,2 ..., N.
If Y=is [y
1, y
2..., y
m]
t, B=[b (1), b (2) ..., b (N)]
t, c
j=[c
j(1), c
j(2) ..., c
j(N)]
t, C=[c
1, c
2..., c
m]
t, and can obtain according to formula (4):
Y＝CB(5)
Consider counting yield and fitting precision, adopt minimum mean square error method estimating hyperplane parameter B in the present embodiment, there is following closed solutions:
B＝(C
TC)
-1C
TY(6)
When sample size M is much larger than number of channels N, meet Matrix C
tc is reversible.
Further, calculate calibration value based on lineoid parameter, because the phase shifter of each receiving cable all has certain Phase-shifting Errors, the deviation accumulation of each passage will cause composite signal Y to produce error, and actual composite signal is expressed as follows:
Y＝CB+ε(7)
Wherein ε is the error amount that all passages add up.If directly adopt minimum mean square error method matching sample, be vulnerable to noise, robustness is poor.Therefore need in the present embodiment to process the parameter that matching obtains further, concrete steps are as follows:
1) gather L sample, and meet L > M, initializing variable k=0, K, wherein K is the number of times of matching;
2) a random selecting M sample from L sample, and meet M > N, k=k+1;
3) M the sample utilizing minimum mean square error method matching to choose, estimates to obtain a kth rough lineoid parameter B
k;
4) judge whether k < K condition meets, if met, return the 2nd step and perform, otherwise perform the 5th step;
5) according to K rough lineoid parameter
calculate accurate lineoid parameter B in the following manner
f:
B
f(i)＝median{B
1(i),B
2(i),...,B
K(i)}(8)
Above-mentioned formula (8) i.e. lineoid parameter B
fthe value of every one dimension is K rough lineoid parameter
the intermediate value of respective dimensions.Every one dimension due to lineoid parameter is all plural number, and median calculation is that real part and imaginary part ask intermediate value respectively.Final lineoid parameter B
ffor the width of each receiving cable signal is worth mutually, with a certain passage for benchmark, can in the hope of the calibration value of other each passage.
In the present embodiment, by the collimation technique of passage, effectively can reduce the width facial difference of each unit channel of phased array antenna, improve the key property of phased array antenna, as: beam-pointing accuracy, null depth, minor level, angle measurement accuracy etc.Further, each passage can be made to avoid the independent actuating switch of design and load, simplify the hardware design of phased array antenna.Further, the channel calibration method adopted in the present embodiment, reduces the impact of phase shifter error on calibration accuracy, makes calibration data true and accurate more.Ensure that the interchangeability of each assembly of phased array antenna.By calibrating before use, reduce the requirement such as design, technique, assembling of T/R, receiver, decrease phased array antenna dispatch from the factory before a large amount of test job.
Embodiment three
Based on the inventive concept identical with the embodiment of the present application one, please refer to Fig. 3, the embodiment of the present application three provides a kind of electronic equipment, comprising:
Signal picker 301, for gathering the M corresponding with a N number of passage sample signal, wherein, in a described M sample signal, each sample signal comprises the signal of calibrating signal by synthesizing after each passage in described N number of passage, N be greater than 0 integer, M is the integer being greater than N;
Storage unit 302, for storing at least one program module;
At least one processor 303, at least one processor described, by obtaining and running at least one program module described, for carrying out matching with preset strategy to a described M sample signal, obtains the signal width phase deviation value of each passage in described N number of passage; Based on the signal width phase deviation value of each passage in described N number of passage, to described N number of calibrate.
Optionally, described signal picker specifically for:
Obtain the M group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described M group phase shift value, in described M group phase shift value, each group phase shift value is different;
Getting i is successively 1 to M, when the phase shift value of described N number of passage is adjusted to i-th group of phase shift value in described M group phase shift value, obtains i-th sample signal of described calibrating signal by synthesizing after described N number of passage;
When i is M, obtain M sample signal.
Optionally, described signal picker specifically for:
Obtain the L group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described L group phase shift value, in described L group phase shift value, each group phase shift value is different, and L is the integer being greater than M;
Getting j is successively 1 to L, when the phase shift value of described N number of passage is adjusted to the jth group phase shift value in described L group phase shift value, obtains jth the sample signal of described calibrating signal by synthesizing after described N number of passage;
When j is L, obtain L sample signal;
A random selecting M sample signal from a described L sample signal.
Optionally, signal picker specifically for:
After described acquisition L sample signal, based on a described L sample signal, determine K group sample signal, often organize sample signal in described K group sample signal and all comprise M sample signal, M the sample signal that often group comprises is the sample signal from described L sample signal random selecting, K be greater than 1 integer;
Getting t is successively 1 to K, carries out matching with described preset strategy to M sample signal in t group sample signal, obtains the t group parameter value corresponding with the signal width phase deviation value of each passage in described N number of passage; When t is K, obtain K group parameter value;
N number of value is determined, the signal width phase deviation value of each passage in the corresponding described N number of passage of described N number of value from described K group parameter value.
Optionally, at least one processor described also for:
In linear regression mode, matching is carried out to a described M sample signal; Or
In robustness regression mode, matching is carried out to a described M sample signal; Or
In ridge regression mode, matching is carried out to a described M sample signal.
By the one or more technical schemes in the embodiment of the present application, following one or more technique effect can be realized:
1, due in technical scheme in the embodiment of the present application, have employed and gather M the sample signal corresponding with N number of passage, wherein, in a described M sample signal, each sample signal comprises the signal of calibrating signal by synthesizing after each passage in described N number of passage, N be greater than 0 integer, M is the integer being greater than N; With preset strategy, matching is carried out to a described M sample signal, obtain the signal width phase deviation value of each passage in described N number of passage; Based on the signal width phase deviation value of each passage in described N number of passage, to the technological means of described N number of calibrate.Like this, when needs are calibrated multiple passage, only need to collect the multiple sample signals corresponding with these passages, again the signal width phase deviation value that matching can obtain each passage is carried out to these sample signals, do not need for any assisted calibration hardware circuit of channels designs, only adopt software processing mode can calculate the signal width phase deviation value of each passage.So, effectively can solve in prior art that to there is calibrate mode complicated, and the technical matters that required cost is higher, provide a kind of simple and calibrate mode of low cost.
2, due in technical scheme in the embodiment of the present application, have employed based on a described L sample signal, determine K group sample signal, often organize sample signal in described K group sample signal and all comprise M sample signal, M the sample signal that often group comprises is the sample signal from described L sample signal random selecting, K be greater than 1 integer; Getting t is successively 1 to K, carries out matching with described preset strategy to M sample signal in t group sample signal, obtains the t group parameter value corresponding with the signal width phase deviation value of each passage in described N number of passage; When t is K, obtain K group parameter value; N number of value is determined, the technological means of the signal width phase deviation value of each passage in the corresponding described N number of passage of described N number of value from described K group parameter value.Like this, electronic equipment is when collecting multiple sample signal about passage, many group samples can be selected to carry out matching, and then the signal width phase deviation value of each passage in multiple passage is determined by the multiple fitting results obtained, can when there is error in phase shifter, obtain the signal width phase deviation value of accurate each passage, ensure that the accuracy of calibrate.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disk memory, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the process flow diagram of the method for the embodiment of the present invention, equipment (system) and computer program and/or block scheme.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block scheme and/or square frame and process flow diagram and/or block scheme and/or square frame.These computer program instructions can being provided to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computing machine or other programmable data processing device produce device for realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be loaded in computing machine or other programmable data processing device, make on computing machine or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computing machine or other programmable devices is provided for the step realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
Specifically, the computer program instructions that channel calibration method in the embodiment of the present application is corresponding can be stored in CD, hard disk, on the storage mediums such as USB flash disk, when the computer program instructions corresponding with channel calibration method in storage medium to be read by electronic equipment or be performed, comprise the steps:
Gather M the sample signal corresponding with N number of passage, wherein, in a described M sample signal, each sample signal comprises the signal of calibrating signal by synthesizing after each passage in described N number of passage, N be greater than 0 integer, M is the integer being greater than N;
With preset strategy, matching is carried out to a described M sample signal, obtain the signal width phase deviation value of each passage in described N number of passage;
Based on the signal width phase deviation value of each passage in described N number of passage, to described N number of calibrate.
Optionally, store in described storage medium with step: gathering computer program instructions corresponding to the M corresponding with a N number of passage sample signal when being performed, specifically comprising the steps:
Obtain the M group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described M group phase shift value, in described M group phase shift value, each group phase shift value is different;
Getting i is successively 1 to M, when the phase shift value of described N number of passage is adjusted to i-th group of phase shift value in described M group phase shift value, obtains i-th sample signal of described calibrating signal by synthesizing after described N number of passage;
When i is M, obtain M sample signal.
Optionally, store in described storage medium with step: gathering computer program instructions corresponding to the M corresponding with a N number of passage sample signal when being performed, specifically comprising the steps:
Obtain the L group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described L group phase shift value, in described L group phase shift value, each group phase shift value is different, and L is the integer being greater than M;
Getting j is successively 1 to L, when the phase shift value of described N number of passage is adjusted to the jth group phase shift value in described L group phase shift value, obtains jth the sample signal of described calibrating signal by synthesizing after described N number of passage;
When j is L, obtain L sample signal;
A random selecting M sample signal from a described L sample signal.
Optionally, other computer program instructions is also stored in described storage medium, this other computer program instructions with step: obtain after computer program instructions corresponding to L sample signal is performed and be performed, comprise the steps: in implementation
Based on a described L sample signal, determine K group sample signal, often organize sample signal and all comprise M sample signal in described K group sample signal, M the sample signal that often group comprises is the sample signal from described L sample signal random selecting, K be greater than 1 integer;
Getting t is successively 1 to K, carries out matching with described preset strategy to M sample signal in t group sample signal, obtains the t group parameter value corresponding with the signal width phase deviation value of each passage in described N number of passage; When t is K, obtain K group parameter value;
N number of value is determined, the signal width phase deviation value of each passage in the corresponding described N number of passage of described N number of value from described K group parameter value.
Optionally, store in described storage medium with step: with preset strategy, computer program instructions corresponding to matching being carried out when being performed to a described M sample signal, specifically comprising the steps:
In linear regression mode, matching is carried out to a described M sample signal; Or
In robustness regression mode, matching is carried out to a described M sample signal; Or
In ridge regression mode, matching is carried out to a described M sample signal.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a channel calibration method, comprising:
Gather M the sample signal corresponding with N number of passage, wherein, in a described M sample signal, each sample signal comprises the signal of calibrating signal by synthesizing after each passage in described N number of passage, N be greater than 0 integer, M is the integer being greater than N;
With preset strategy, matching is carried out to a described M sample signal, obtain the signal width phase deviation value of each passage in described N number of passage;
Based on the signal width phase deviation value of each passage in described N number of passage, to described N number of calibrate.
2. the method for claim 1, is characterized in that, M the sample signal that described collection is corresponding with N number of passage, specifically comprises:
Obtain the M group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described M group phase shift value, in described M group phase shift value, each group phase shift value is different;
Getting i is successively 1 to M, when the phase shift value of described N number of passage is adjusted to i-th group of phase shift value in described M group phase shift value, obtains i-th sample signal of described calibrating signal by synthesizing after described N number of passage;
When i is M, obtain M sample signal.
3. the method for claim 1, is characterized in that, M the sample signal that described collection is corresponding with N number of passage, specifically comprises:
Obtain the L group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described L group phase shift value, in described L group phase shift value, each group phase shift value is different, and L is the integer being greater than M;
Getting j is successively 1 to L, when the phase shift value of described N number of passage is adjusted to the jth group phase shift value in described L group phase shift value, obtains jth the sample signal of described calibrating signal by synthesizing after described N number of passage;
When j is L, obtain L sample signal;
A random selecting M sample signal from a described L sample signal.
4. method as claimed in claim 3, it is characterized in that, after described acquisition L sample signal, described method also comprises:
Based on a described L sample signal, determine K group sample signal, often organize sample signal and all comprise M sample signal in described K group sample signal, M the sample signal that often group comprises is the sample signal from described L sample signal random selecting, K be greater than 1 integer;
Getting t is successively 1 to K, carries out matching with described preset strategy to M sample signal in t group sample signal, obtains the t group parameter value corresponding with the signal width phase deviation value of each passage in described N number of passage; When t is K, obtain K group parameter value;
N number of value is determined, the signal width phase deviation value of each passage in the corresponding described N number of passage of described N number of value from described K group parameter value.
5. the method as described in claim arbitrary in claim 1-4, is characterized in that, describedly carries out matching with preset strategy to a described M sample signal, is specially:
In linear regression mode, matching is carried out to a described M sample signal; Or
In robustness regression mode, matching is carried out to a described M sample signal; Or
In ridge regression mode, matching is carried out to a described M sample signal.
6. an electronic equipment, comprising:
Signal picker, for gathering the M corresponding with a N number of passage sample signal, wherein, in a described M sample signal, each sample signal comprises the signal of calibrating signal by synthesizing after each passage in described N number of passage, N be greater than 0 integer, M is the integer being greater than N;
Storage unit, for storing at least one program module;
At least one processor, at least one processor described, by obtaining and running at least one program module described, for carrying out matching with preset strategy to a described M sample signal, obtains the signal width phase deviation value of each passage in described N number of passage; Based on the signal width phase deviation value of each passage in described N number of passage, to described N number of calibrate.
7. electronic equipment as claimed in claim 6, is characterized in that, described signal picker specifically for:
Obtain the M group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described M group phase shift value, in described M group phase shift value, each group phase shift value is different;
Getting i is successively 1 to M, when the phase shift value of described N number of passage is adjusted to i-th group of phase shift value in described M group phase shift value, obtains i-th sample signal of described calibrating signal by synthesizing after described N number of passage;
When i is M, obtain M sample signal.
8. electronic equipment as claimed in claim 6, is characterized in that, described signal picker specifically for:
Obtain the L group phase shift value corresponding with described N number of passage prestored, often organize the phase shift value that phase shift value all comprises each passage in described N number of passage in described L group phase shift value, in described L group phase shift value, each group phase shift value is different, and L is the integer being greater than M;
Getting j is successively 1 to L, when the phase shift value of described N number of passage is adjusted to the jth group phase shift value in described L group phase shift value, obtains jth the sample signal of described calibrating signal by synthesizing after described N number of passage;
When j is L, obtain L sample signal;
A random selecting M sample signal from a described L sample signal.
9. electronic equipment as claimed in claim 8, is characterized in that, signal picker specifically for:
After described acquisition L sample signal, based on a described L sample signal, determine K group sample signal, often organize sample signal in described K group sample signal and all comprise M sample signal, M the sample signal that often group comprises is the sample signal from described L sample signal random selecting, K be greater than 1 integer;
Getting t is successively 1 to K, carries out matching with described preset strategy to M sample signal in t group sample signal, obtains the t group parameter value corresponding with the signal width phase deviation value of each passage in described N number of passage; When t is K, obtain K group parameter value;
N number of value is determined, the signal width phase deviation value of each passage in the corresponding described N number of passage of described N number of value from described K group parameter value.
10. the electronic equipment as described in claim arbitrary in claim 6-9, is characterized in that, at least one processor described also for:
In linear regression mode, matching is carried out to a described M sample signal; Or
In robustness regression mode, matching is carried out to a described M sample signal; Or
In ridge regression mode, matching is carried out to a described M sample signal.
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