CN105323021B - The calibration method of spaceborne phased array transmitting antenna based on cyclically shifted sequences - Google Patents
The calibration method of spaceborne phased array transmitting antenna based on cyclically shifted sequences Download PDFInfo
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Abstract
The present invention relates to a kind of calibration method and system of the spaceborne phased array transmitting antenna based on cyclically shifted sequences.This method includes：S1, spaceborne phased array transmitting antenna generation calibration signal are simultaneously sent to earth station；S2, the earth station generate correction factor vector according to the calibration signal and feed back to the spaceborne phased array transmitting antenna by the way that up injected system is counter；S3, the spaceborne phased array transmitting antenna adjust the amplitude and phase of each transmission channel according to correction factor vector.The present invention program is simple and easy to do, can calibrate all transmitting antennas simultaneously, reduces prover time consumption；Only need to use a pair of digital matched filters to obtain the calibration factor of all passages, greatly reduce calibration system complexity.
Description
Technical field
The present invention relates to radar antenna far-field measurement technical field, more particularly to it is a kind of based on the spaceborne of cyclically shifted sequences
The calibration method and system of phased array transmitting antenna.
Background technology
Satellite antenna is the important component of the payload such as satellite communication, observing and controlling, remote sensing, to Satellite Payloads
Performance important.Phased array antenna have the characteristics that wave beam quickly scan, beam shape agile and space power synthesis,
As an important development direction of satellite antenna.Due to the particularity of space application environment, the passage of spaceborne phased array antenna
Amplitude-phase consistency, which is vulnerable to the factors such as front thermal deformation, channel temperature drift and device aging, to be influenceed, and causes its passage consistency
There is time varying characteristic.In order to ensure the performances such as the wave beam minor level of phased array antenna, beam-pointing accuracy, except being sent out in satellite
Phased array antenna is calibrated before penetrating, it is necessary to the spaceborne phased array antenna in running track is periodically entered in earth station
Row of channels amplitude-phase consistency is calibrated.
At present, phased array antenna calibration method mainly has rotating electric field vector (REV) method, normalization transmission coding
(UTE) method and control circuit coding (CCE) method.REV methods are by controlling the phase shifter of array element front end to change total electric field
The electric-field intensity of vector, measuring amplitude information is only needed, is that can obtain the amplitude and phase value of the rotating vector by mathematical computations,
But this method needs to measure antenna channels one by one, when array quantity is larger, when calibration process needs to expend a large amount of
Between.UTE and CCE is two kinds of methods for calibrating phased array antenna in far field using time-division multiplex orthogonal intersection code signal, uses cubicle switchboard
Battle array is mutually encouraged to each unit width of spaceborne phased array antenna and encoded, and earth base station decodes to reception signal, so as to
Width to tested antenna mutually encourages, but the computation complexity of both approaches is higher.
The content of the invention
One of purpose of the present invention is to provide a kind of spaceborne phased array transmitting antenna based on cyclically shifted sequences
Calibration method and system, with solve phased array antenna calibration method prover time is long in the prior art, computation complexity is high
Technical problem.
For achieving the above object, the embodiments of the invention provide a kind of spaceborne phased array based on cyclically shifted sequences
The calibration method of transmitting antenna, including：
S1, spaceborne phased array transmitting antenna generation calibration signal are simultaneously sent to earth station；
S2, the earth station generate correction factor vector according to the calibration signal and feed back to the spaceborne phased paroxysm
Penetrate antenna；
S3, the spaceborne phased array transmitting antenna according to correction factor vector adjust each transmission channel amplitude and
Phase.
Alternatively, the calibration signal is obtained by following steps in the step S1, including：
S11, produce the original m-sequence c that a code length is N0(n), and acquisition is tested the number of active lanes K of transmission channel；
S12, to the original m-sequence cyclic shift, shift length LoffsetIndividual symbol, to obtain the m after cyclic shift
Sequence code ck(n), wherein LoffsetFor the positive integer more than or equal to 2；
S13, according to step S12 K-1 cyclic shift is carried out to the original m-sequence, by original m-sequence c0(n) and
The m-sequence code c of each cyclic shiftk(n) it is arranged in order to form m-sequence code character, wherein k is positive integer and 1≤k≤K；
S14, using the m-sequence code character complete " 1 " information is spread, and the m-sequence code character after spread spectrum is adjusted
System, to obtain calibration signal.
Alternatively, the m-sequence code character after spread spectrum is modulated using BPSK in the step S14.
Alternatively, also include after the step S14：
Digital-to-analogue conversion is carried out to the calibration signal to obtain missile calibration signal Sk(t), wherein described launch
Calibration signal Sk(t) represented using following formula：
In formula, 1≤k≤K, K are the quantity of transmission channel to be calibrated,akFor the increasing of k-th of transmission channel
Benefit, ωcFor the angular frequency of transmission channel,For the phase of k-th of transmission channel, g (t) is to be molded waveform, TcFor a spread spectrum
The chip duration of code, ck(n) it is the m-sequence code corresponding to k-th of transmission channel to be calibrated.
Alternatively, correction factor vector is obtained by following steps in the step S2, including：
S21, reception simultaneously obtain the calibration signal S after spatialR(t)；
The calibration signal S of S22, processing after spatialR(t) to obtain base-band in-phase signal I (t) and base band quadrature
Signal Q (t)；
S23, it is utilized respectively the base-band in-phase signal I (t) and the base band quadrature signal Q (t) and the progress of original m-sequence
Convolution algorithm, to obtain the amplitude phase error estimate of each transmission channel；
S24, any one transmission channel is chosen as reference channel, it is logical to obtain each transmitting using amplitude phase error estimate
The relative magnitude and relative phase in road；
S25, correction factor vector is generated according to the relative magnitude and relative phase of each transmission channel.
Alternatively, it is characterised in that amplitude phase error estimate is obtained by following steps in the step S23, including：
S231, base-band in-phase signal I (t) and base band quadrature signal Q (t) and original m-sequence be subjected to convolution algorithm, to obtain
The number of winning the confidence PI (t) and signal PQ (t)；
S232, to the signal PI (t) and the related blob detection of signal PQ (t) progress, to obtain correlation peak；
S232, according to the correlation peak obtained in step S232, calculate the width phase factor α of each transmission channelkAnd βk,
Then the range error estimate of each transmission channel is calculated.
Second aspect, the embodiment of the present invention additionally provide a kind of spaceborne phased array transmitting antenna based on cyclically shifted sequences
Calibration system, including：Spaceborne phased array transmitting antenna and earth station, wherein：
The spaceborne phased array transmitting antenna, the earth station is sent to for generating calibration signal, and according to described
The correction factor vector of face station feedback adjusts the amplitude and phase of each transmission channel；
The earth station, for generating correction factor vector according to the calibration signal and feeding back to the spaceborne phased array
Transmitting antenna.
Alternatively, the spaceborne phased array transmitting antenna includes：
The calibration signal generating means, for generating calibration signal；
The transmitting channel correction device, for transmitting calibration signal or carrying out school to transmission channel according to correction factor
Just；
The digiverter, the calibration for calibration signal progress digital-to-analogue conversion to be obtained to analog form are believed
Number；
The transmitting terminal radio frequency handling device, for the calibration signal of simulation to be carried out into up-conversion and carries out power amplification；
The phased array transmitting antenna, for the calibration signal after up-conversion and power amplification to be sent to the receiving terminal
Radio frequency handling device；
The correction factor reception device, for receive the correction factor from the correction factor dispensing device to
Measure and send to the transmitting channel correction device.
Alternatively, the earth station includes：
The receiving terminal radio frequency handling device, for being demodulated to received signal with acquisition after spatial
Calibration signal；
The sampling apparatus, for sample calibration signal after spatial with obtain digital form by space
Calibration signal after propagation；
The correction factor generating means, school is generated for the calibration signal after spatial according to digital form
Positive divisor vector；
The correction factor dispensing device, for correction factor vector to be sent to correction factor reception device.
The embodiment of the present invention to original m-sequence by carrying out multiple cyclic shift to produce multiple spreading codes.In port number
In the case that mesh increases, it is only necessary to which a longer m-sequence can be achieved with calibrating, and scheme is simple and easy to do, save a yard resource.It is real
In the application of border, the present invention only need to use a pair of identical digital matched filters with regard to can obtain the calibrations of all passages because
Son, substantially reduce system complexity.
Brief description of the drawings
The features and advantages of the present invention can be more clearly understood by reference to accompanying drawing, accompanying drawing is schematically without that should manage
Solve to carry out any restrictions to the present invention, in the accompanying drawings：
Fig. 1 is a kind of calibration of spaceborne phased array transmitting antenna based on cyclically shifted sequences provided in an embodiment of the present invention
Method flow diagram；
Fig. 2 is calibration signal generating process flow chart provided in an embodiment of the present invention；
Fig. 3 is a kind of calibration of spaceborne phased array transmitting antenna based on cyclically shifted sequences provided in an embodiment of the present invention
System construction drawing.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
In a first aspect, the embodiments of the invention provide a kind of spaceborne phased array transmitting antenna based on cyclically shifted sequences
Calibration method, as shown in figure 1, including：
S1, spaceborne phased array transmitting antenna generation calibration signal are simultaneously sent to earth station；
S2, earth station, which generate correction factor vector according to above-mentioned calibration signal and feed back to above-mentioned spaceborne phased array, launches day
Line；
S3, the spaceborne phased array transmitting antenna adjust the amplitude and phase of each transmission channel according to above-mentioned correction factor vector
Position.
Below to the calibration side of the spaceborne phased array transmitting antenna provided in an embodiment of the present invention based on cyclically shifted sequences
Method elaborates.
First, the step of introducing S1, spaceborne phased array transmitting antenna generation calibration signal and being sent to earth station.
In practical application, spaceborne phased array transmitting antenna obtains calibration signal by following steps, as shown in Fig. 2 including：
S11, spaceborne phased array transmitting antenna produce the original m-sequence c that a code length is N0(n), and acquisition is tested transmitting
The number of active lanes K of passage；
S12, to the original m-sequence cyclic shift, shift length LoffsetIndividual symbol, to obtain the m after cyclic shift
Sequence code ck(n), wherein LoffsetFor the positive integer more than or equal to 2；
S13, according to step S12 K-1 cyclic shift is carried out to the original m-sequence, by original m-sequence c0(n) and
The m-sequence code c of each cyclic shiftk(n) it is arranged in order to form m-sequence code character, wherein k is positive integer and 1≤k≤K；
S14, using the m-sequence code character complete " 1 " information is spread, and the m-sequence code character after spread spectrum is adjusted
System, to obtain calibration signal.
In practical application, alternatively, the m-sequence code character after spread spectrum is modulated using BPSK in step S14, and will be adjusted
Signal after system is as calibration signal.Certain those skilled in the art can select other modulation according to specific usage scenario
Method obtains calibration signal, and the present invention is not construed as limiting.
In practical application, the school signal of acquisition is launched by phase control emission antenna also needs to digital-to-analogue conversion before, including：
Digital-to-analogue conversion is carried out to calibration signal to obtain missile calibration signal Sk(t), wherein the missile school
Calibration signal Sk(t) represented using following formula：
In formula, 1≤k≤K, K are the quantity of transmission channel to be calibrated,akFor the increasing of k-th of transmission channel
Benefit, ωcFor the angular frequency of transmission channel,For the phase of k-th of transmission channel, g (t) is to be molded waveform, TcFor an expansion
The chip duration of frequency code, ck(n) it is the m-sequence code corresponding to k-th of transmission channel to be calibrated.
Secondly, S2 is introduced, earth station generates correction factor vector according to the calibration signal and feeds back to the spaceborne phase
The step of controlling battle array transmitting antenna.
In practical application, earth station obtains correction factor vector by following steps, including：
S21, obtain the calibration signal S after spatialR(t)；
The calibration signal S of S22, processing after spatialR(t) to obtain base-band in-phase signal I (t) and base band quadrature
Signal Q (t)；
S23, it is utilized respectively base-band in-phase signal I (t) and base band quadrature signal Q (t) and original m-sequence progress convolution algorithm
(i.e. matched filtering), to obtain the amplitude phase error estimate of each transmission channel；
S24, any one transmission channel is chosen as reference channel, it is logical to obtain each transmitting using amplitude phase error estimate
The relative magnitude and relative phase in road；
S25, correction factor vector is generated according to the relative magnitude and relative phase of each transmission channel.
Wherein, step S21：The calibration signal after spatial as shown in formula (2) that antenna at far field receives
SR(t)：
In formula, 1≤k≤K, K are the quantity of transmission channel to be calibrated,akFor the increasing of k-th of transmission channel
Benefit, ωcFor the angular frequency of transmission channel,For the phase of k-th of transmission channel, g (t) is to be molded waveform, TcFor a spread spectrum
The chip duration of code, ck(n) it is the m-sequence code corresponding to k-th of transmission channel to be calibrated, n (t) is noise, and B is school
Loss of the calibration signal after spatial.
It will be appreciated that g (t) refers to base band shaping waveform for shaping waveform.Baseband signal bandwidth is infinity, it is necessary to limit
Make its bandwidth；Simultaneously in order to overcome intersymbol interference, so needed before baseband signal is through ovennodulation with a formed filter,
Waveform after formed filter is exactly g (t).
It will be appreciated that a data-signal (such as logic 1 or 0) is generally encoded with multiple encoded signals, that
The can of logic 1 or 0 that one of encoded signal is known as in a chip, such as spreading code is considered as a chip.
The chip duration of one spreading code just refers to, the duration of the logic 1 or 0 in previously mentioned spreading code.
Wherein, step S22：Calibration signal S after spatialR(t) at by low-noise amplifier, down coversion
Reason, then sample by analog-to-digital conversion to obtain data signal, finally obtain base band by orthogonal digital down coversion, digital matched filtering
In-phase signal I (t) and base band quadrature signal Q (t), is shown below：
In formula,g*(t) conjugate transposition for being g (t),
nI(t)、nQ(t) be respectively baseband inphase and base band quadrature branch road noise.
Wherein, step S23：Obtaining the amplitude phase error estimate of each transmission channel includes：
S231, base-band in-phase signal I (t) and base band quadrature signal Q (t) and original m-sequence are subjected to convolution algorithm (matched
Filtering), the signal PI (t) after matched filtering and PQ (t) are obtained, wherein：
In formula, c*(n) it is the conjugate transposition of original m-sequence,For convolution algorithm.
S232, to the signal PI (t) after matched filtering and the related blob detection of PQ (t) progress.By the property of original m-sequence
Matter and digital matched filtering principle are understood, after digital matched filtering, there is K in signal PI (t) and PQ (t) each cycle
Relevant peaks, it is shown below：
In formula (7) and formula (8), LoffsetFor symbol offset number, PIk、PQkFor in signal PI (t) and PQ (t) each cycles
The value of each relevant peaks, represent as follows：
PIk=-α1-α2-…+N·αk-αk+1-…-αK, (9)
PQk=-β1-β2-…+N·βk-βk+1-…-βK, (10)
In formula, 1≤k≤K.
S233：Relevant peaks according to being obtained in step S232 calculate the I/Q width phase factors α of each transmission channelkAnd βk,
Then the range error estimate of each transmission channel is calculated.
The I/Q width phase factors α of each transmission channelkAnd βkSolved using following methods：
1st, by the PI in step S232kRepresented using matrix form：
It is designated as：P=BTAb+n.
In formula, n is noise vector；P is the column vector being made up of correlation peak；A is by α1To αkThe diagonal matrix of composition；B is
Information sequence, because calibration signal is using complete " 1 " information sequence, therefore b is a K dimensional vector.The leftmost K in equation right side ×
K matrix is original m-sequence and the cross-correlation matrix of the m-sequence code character with chip offset, is denoted as T.It is special that the matrix has
Invert form, shown in the form such as formula (12) of its inverse matrix：
In formula, a and b are a constants only relevant with code length N, the complexity very little of the matrix inversion.
2nd, represented by the matrix in step 1, according to the principle of decorrelation Multiuser Detection, solve width phase factor αk, solve
Process can represent as follows：
T-1P=BAb+T-1n (13)
And it can be converted to：
By solution procedure above and signal estimation theory, αKEstimateRepresent as follows：
It can be seen that from formula (15), it is only necessary to the relevant peaks of output are detected in one end of matched filter, treat one
After the individual spreading code cycle has captured all relevant peaks, width phase factor estimate can be just obtained according to above equationAnd
The degree of accuracy of amplitude phase error estimate is only affected by noise, completely eliminates in general and is using non-orthogonal spreading codes work
The multi-access inference of system.
3rd, solved according to step 1 and step 2 identical methodK-th of passage is calculated as follows
Amplitude phase error estimate.
AcquiredWithFor the amplitude phase error estimate of k-th of transmission channel.
Using some transmission channel q as reference channel, calculate other passages relative to the passage relative amplitude and
Relative phase, correction factor is calculated according to the relative amplitude and relative phase tried to achieve, transmitting terminal is sent back and is calibrated.
If examining passage with transmission channel q (1≤q≤K), relative amplitude and relative phase are：
In formula (18) and formula (19), 1≤k≤K, k ≠ q.
WhereinWithRepresent the relative amplitude (unit of other passages in addition to reference channel：) and relative phase dB
(unit：Degree).
Hypothetical reference path is passage 1, and the vector of correction factor composition can represent as follows：
Finally introduce S3, spaceborne phased array transmitting antenna according to correction factor vector adjust each transmission channel amplitude and
Phase.
After spaceborne phased array transmitting antenna receives correction factor vector, corresponding transmission channel is adjusted.
In practical application, the m-sequence code character that original m-sequence and the m-sequence by displacement are formed is with general frequency expansion sequence
It is identical, it may be used in the communication system using spectrum spreading method.But the generation of in general frequency expansion sequence needs linear feedback to move
Bit register.Such as when 5 transmission channels, then 5 linear feedback shift registers are needed to produce 5 groups of m-sequences, and also need
5 groups of matched filters are used, therefore resource consumption is very big.In system provided by the invention, using in the scheme of Phase shift m sequence
1 linear feedback shift register is only needed with regard to an original m-sequence can be produced, 4 m after being shifted by 4 times
Sequence, a m-sequence code character is formed, and 1 group of matched filter is only needed with regard to the schools of 5 transmission channels can be obtained in receiving terminal
Positive divisor.The present invention, which provides, needs 1 group of matched filter can with the code character as caused by 5 linear feedback shift registers
There is identical effect, greatly save resource.
To embody the calibration side of the spaceborne phased array transmitting antenna provided in an embodiment of the present invention based on cyclically shifted sequences
The superiority of method, second aspect, the embodiment of the present invention additionally provide a kind of spaceborne phased array transmitting based on cyclically shifted sequences
The calibration system of antenna, as shown in figure 3, including：Spaceborne phased array transmitting antenna and earth station, wherein：
Spaceborne phased array transmitting antenna, the earth station is sent to for generating calibration signal, and according to the earth station
The correction factor vector of feedback adjusts the amplitude and phase of each transmission channel；
Earth station, launch for generating correction factor vector according to above-mentioned calibration signal and feeding back to above-mentioned spaceborne phased array
Antenna.
Alternatively, spaceborne phased array transmitting antenna described above includes：
Calibration signal generating means, for generating calibration signal；
Transmitting channel correction device, for transmitting calibration signal or being corrected according to correction factor to transmission channel；
Digiverter, for calibration signal progress digital-to-analogue conversion to be obtained into the calibration signal of analog form；
Transmitting terminal radio frequency handling device, for the calibration signal of simulation to be carried out into up-conversion and carries out power amplification；
Phased array transmitting antenna, for the calibration signal after up-conversion and power amplification to be sent to the receiving terminal radio frequency
Processing unit；
Correction factor reception device, for receiving the correction factor vector from the correction factor dispensing device simultaneously
Send to the transmitting channel correction device.
Alternatively, the earth station includes：
Receiving terminal radio frequency handling device, for being demodulated the school with acquisition after spatial to received signal
Calibration signal；
Sampling apparatus, pass through spatial for sampling calibration signal after spatial with obtain digital form
Calibration signal afterwards；
Correction factor generating means, for according to calibration signal generation correction of the digital form after spatial because
Subvector；
Correction factor dispensing device, for correction factor vector to be sent to correction factor reception device.
The calibration system work of spaceborne phased array transmitting antenna provided in an embodiment of the present invention based on cyclically shifted sequences
Process is as follows：
Spaceborne phased array transmitting antenna calibration signal generating means generate calibration signal according to step described above, should
Calibration signal is transferred to digiverter by transmitting channel correction device；The digiverter is by calibration signal number
The calibration signal of mould conversion generation analog form；The calibration signal of analog form is carried out up-conversion by transmitting terminal radio frequency handling device
And through being sent by phased array transmitting antenna to earth station after power amplification.
Receiving terminal radio frequency handling device in earth station receives the signal after spatial and is demodulated acquisition calibration
Signal；Sampling apparatus samples to the calibration signal after spatial, so as to obtain the calibration signal of digital form；School
Positive divisor generating means the calibration signal of the digital form is handled so as to generate correction factor vector and by correct because
Sub- dispensing device is transferred to spaceborne phased array transmitting antenna.
Correction factor reception device in spaceborne phased array transmitting antenna receives the correction factor vector from earth station
After be sent to transmitting channel correction device, each transmission channel is corrected by the transmitting channel correction device.
In summary, the calibration of the spaceborne phased array transmitting antenna provided in an embodiment of the present invention based on cyclically shifted sequences
Method and system, by carrying out multiple cyclic shift to original m-sequence to produce the feelings that multiple spreading codes increase in number of active lanes
Under condition, it is only necessary to which a longer m-sequence, scheme is simple and easy to do, saves a yard resource.In practical application, the present invention only needs
Using a pair of identical digital matched filters with regard to multiple relevant peaks can be obtained, system complexity is substantially reduced.This hair
It is bright that multi-access inference is eliminated using decorrelation Multiuser Detection.Decorrelation computing is related to inverting for frequency expansion sequence cross-correlation matrix
Computing T-1With the multiplying T of matrix and vector-1P.In general K × K matrix inversion operation complexity is very high, complexity O
(K3).But with form of the cross-correlation matrix of m-sequence code character with special matrix of code skew, the form of its inverse matrix
It is identical with original matrix and only relevant with the length N of m-sequence, therefore understand its operand and in general K × K matrix inversion operation
Compared to negligible.The multiplying of in general matrix (K × K) and vectorial (K × 1) needs K2Secondary complex multiplication and plural number add
Method, and matrix multiplication here only needs 2K sub-additions and 2K complex multiplication, it is known that only needing seldom operand just
Whole decorrelation process can be realized.
Although being described in conjunction with the accompanying embodiments of the present invention, those skilled in the art can not depart from this hair
Various modifications and variations are made in the case of bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (9)
- A kind of 1. calibration method of the spaceborne phased array transmitting antenna based on cyclically shifted sequences, it is characterised in that including：S1, spaceborne phased array transmitting antenna generation calibration signal are simultaneously sent to earth station；The calibration signal is the spaceborne phase Control battle array transmitting antenna utilize complete " 1 " information spread by the m-sequence code character that cyclic shift obtains according to original m-sequence with What modulation obtained；S2, the earth station, which generate correction factor vector according to the calibration signal and feed back to the spaceborne phased array, launches day Line；The correction factor vector is each transmission channel obtained based on the earth station according to the calibration signal received Relative magnitude and relative phase and generate；S3, the spaceborne phased array transmitting antenna adjust the amplitude and phase of each transmission channel according to correction factor vector Position.
- 2. the calibration method of spaceborne phased array transmitting antenna according to claim 1, it is characterised in that in the step S1 The calibration signal is obtained by following steps, including：S11, produce the original m-sequence c that a code length is N1(n), and acquisition is tested the number of active lanes K of transmission channel；S12, to the original m-sequence cyclic shift, shift length LoffsetIndividual symbol, to obtain the m-sequence after cyclic shift Code ck(n), wherein LoffsetFor the positive integer more than or equal to 2；S13, according to step S12 K-1 cyclic shift is carried out to the original m-sequence, by original m-sequence c1(n) and every time follow The m-sequence code c of ring displacementk(n) it is arranged in order to form m-sequence code character, wherein k is positive integer and 1≤k≤K；S14, using the m-sequence code character complete " 1 " information is spread, and the m-sequence code character after spread spectrum is modulated, with Obtain calibration signal.
- 3. the calibration method of spaceborne phased array transmitting antenna according to claim 2, it is characterised in that the step S14 It is middle that the m-sequence code character after spread spectrum is modulated using BPSK.
- 4. the calibration method of spaceborne phased array transmitting antenna according to claim 2, it is characterised in that the step S14 Also include afterwards：Digital-to-analogue conversion is carried out to the calibration signal to obtain missile calibration signal Sk(t), wherein the missile calibration Signal Sk(t) represented using following formula：In formula, 1≤k≤K, K are the quantity of transmission channel to be calibrated,akFor the gain of k-th of transmission channel, ωcFor the angular frequency of transmission channel,For the phase of k-th of transmission channel, g (t) is to be molded waveform, TcFor spreading code Chip duration, ck(n) it is the m-sequence code corresponding to k-th of transmission channel to be calibrated.
- 5. the calibration method of spaceborne phased array transmitting antenna according to claim 1, it is characterised in that in the step S2 Correction factor vector is obtained by following steps, including：S21, reception simultaneously obtain the calibration signal S after spatialR(t)；The calibration signal S of S22, processing after spatialR(t) to obtain base-band in-phase signal I (t) and base band quadrature signal Q (t)；S23, it is utilized respectively the base-band in-phase signal I (t) and the base band quadrature signal Q (t) and original m-sequence progress convolution Computing, to obtain the amplitude phase error estimate of each transmission channel；S24, any one transmission channel is chosen as reference channel, each transmission channel is obtained using amplitude phase error estimate Relative magnitude and relative phase；S25, correction factor vector is generated according to the relative magnitude and relative phase of each transmission channel.
- 6. the calibration method of spaceborne phased array transmitting antenna according to claim 5, it is characterised in that the step S23 In by following steps obtain amplitude phase error estimate, including：S231, base-band in-phase signal I (t) and base band quadrature signal Q (t) and original m-sequence be subjected to convolution algorithm, to obtain letter Number PI (t) and signal PQ (t)；S232, to the signal PI (t) and the related blob detection of signal PQ (t) progress, to obtain correlation peak；S232, according to the correlation peak obtained in step S232, calculate the width phase factor α of each transmission channelkAnd βk, then Calculate the range error estimate of each transmission channel.
- A kind of 7. calibration system of the spaceborne phased array transmitting antenna based on cyclically shifted sequences, it is characterised in that including：It is spaceborne Phased array transmitting antenna and earth station, wherein：The spaceborne phased array transmitting antenna, the earth station is sent to for generating calibration signal, and according to the earth station The correction factor vector of feedback adjusts the amplitude and phase of each transmission channel；Wherein, the calibration signal is the spaceborne phase Control battle array transmitting antenna utilize complete " 1 " information spread by the m-sequence code character that cyclic shift obtains according to original m-sequence with What modulation obtained；The earth station, launch for generating correction factor vector according to the calibration signal and feeding back to the spaceborne phased array Antenna；The correction factor vector is that each transmitting obtained based on the earth station according to the calibration signal received is led to The relative magnitude and relative phase in road and generate.
- 8. calibration system according to claim 7, it is characterised in that the spaceborne phased array transmitting antenna includes：Calibration signal generating means, for generating calibration signal；Transmitting channel correction device, for transmitting calibration signal or being corrected according to correction factor to transmission channel；Digiverter, for calibration signal progress digital-to-analogue conversion to be obtained into the calibration signal of analog form；Transmitting terminal radio frequency handling device, for the calibration signal of simulation to be carried out into up-conversion and carries out power amplification；The phased array transmitting antenna, for the calibration signal after up-conversion and power amplification to be sent to receiving terminal radio frequency processing Device；Correction factor reception device, for receiving the correction factor vector from correction factor dispensing device and sending to institute State transmitting channel correction device.
- 9. calibration system according to claim 7, it is characterised in that the earth station includes：Receiving terminal radio frequency handling device, believed for being demodulated to received signal with obtaining the calibration after spatial Number；Sampling apparatus, for sample calibration signal after spatial with obtain digital form after spatial Calibration signal；Correction factor generating means, for according to calibration signal of the digital form after spatial generate correction factor to Amount；Correction factor dispensing device, for correction factor vector to be sent to correction factor reception device.
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| CN108897003B (en) * | 2018-05-03 | 2021-05-04 | 北京理工大学 | Dual-mode control phased array laser radar system and method |
| CN112436907A (en) * | 2020-12-09 | 2021-03-02 | 中国电子科技集团公司第五十四研究所 | Digital phased array transmitting channel consistency rapid calibration system based on m sequence |
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| CN101964449A (en) * | 2010-08-27 | 2011-02-02 | 中国科学院上海微系统与信息技术研究所 | On-track correcting device of space-borne phased array transmitting antenna |
| WO2015065154A1 (en) * | 2013-11-04 | 2015-05-07 | (주)엘지전자 | Method and apparatus for transmitting signal in wireless communication system |
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| CN101964449A (en) * | 2010-08-27 | 2011-02-02 | 中国科学院上海微系统与信息技术研究所 | On-track correcting device of space-borne phased array transmitting antenna |
| WO2015065154A1 (en) * | 2013-11-04 | 2015-05-07 | (주)엘지전자 | Method and apparatus for transmitting signal in wireless communication system |
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