CN106209196B - A kind of phase compensating method and system based on more array element channel selections - Google Patents
A kind of phase compensating method and system based on more array element channel selections Download PDFInfo
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- CN106209196B CN106209196B CN201610509644.2A CN201610509644A CN106209196B CN 106209196 B CN106209196 B CN 106209196B CN 201610509644 A CN201610509644 A CN 201610509644A CN 106209196 B CN106209196 B CN 106209196B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0868—Hybrid systems, i.e. switching and combining
- H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
Abstract
A kind of phase compensating method based on more array element channel selections, the following steps are included: a corresponding and independent tracking channel is arranged for each bay, the corresponding received electromagnetic wave signal of bay of channel locks is tracked, and all bays receive same electromagnetic wave beam signal；After at least more than two tracking channels receive electromagnetic wave beam signal, the channel output signal intensity and carrier phase nco value of locking tracking channel；The channel strength of the tracking channel of real-time monitoring locking then switches bay when wherein a certain signal strength for tracking channel is greater than the signal strength of currently used bay；Extract real-time goes out the carrier phase nco value of the two, and calculates carrier phase difference between the two；In carrier phase difference compensation to down coversion DDC module, switching is completed.The present invention maintains the continuous of carrier phase in bay handoff procedure.
Description
Technical field
The present invention relates to satellite communication field, especially a kind of phase compensating method based on more array element channel selections and its
System.
Background technique
Satellite communication system is made of satellite end, ground surface end, user terminal three parts.Satellite end plays the work of relay station in the sky
With foldback goes back to another earth station again after the electromagnetic wave amplification that earth station is put forward, and satellite health includes two big subsystems again:
Satellite borne equipment and satellite parent.Earth station is then the interface of satellite system Yu ground public network, and terrestrial user can also pass through ground
Face station enters and leaves satellite system and forms link, and earth station further includes ground satellite control centre, and its tracking, Telemetry And Command station.
User terminal is various user terminals.
In satellite communication system, the wave beam of satellite-signal has directionality, the signal intensity ratio of antenna face arrival bearing
Back to direction several dB by force.For more array-element antennas, need to select the array element closest to face arrival bearing in real time
Channel, simultaneously because each element position of antenna is different, the signal code phase and carrier phase received also can be variant.Because
Chip lengths are longer, therefore the difference of signal code phase is little, but carrier signal, because carrier cycle is shorter, array element selection is cut
Carrier phase difference during changing is if it exceeds the tolerance of carrier wave ring will lead to downstream receiver track loop losing lock.
It is all the signal of one array element of fixed reception when antenna receives signal in existing satellite communication system, without channel
Selection.Therefore, under the weaker environment of signal, the signal strength that four array elements of antenna receive is not consistent.Towards
The array element signals of arrival bearing are stronger, and signal can be normally received if the signal receiver using the array element, but is worked as
When antenna rotation leads to the array element back to arrival bearing, then signal strength can decline, so as to cause receiver losing lock；Even if simultaneously
The signal of all directions is sufficiently strong, and direct channels switching also results in access DDC (Digital Down Converter, number
Down coversion) down conversion module signal phase it is discontinuous, especially because carrier cycle is shorter, downstream receiver carrier loop pair
The phase continuity of carrier wave requires height, and switching array element leads to carrier phase discontinuously and then may cause downstream receiver tracking ring
Losing lock occurs for carrier loop.
Summary of the invention
It is an object of the invention to: carrier phase is continuously more in array element handoff procedure when providing a kind of antenna reception signal
The phase compensating method of array element channel selection.
Carrier phase is continuous in array element handoff procedure when receiving signal it is a further object of the present invention to provide a kind of antenna
The Phase Compensation System of more array element channel selections.
In order to solve the above-mentioned technical problem, the present invention is implemented as follows: a kind of phase based on more array element channel selections
Compensation method, including more than two bays, further comprising the steps of:
S1 setting tracking channel: for each bay be arranged a corresponding and independent tracking channel, it is described with
Track channel tracking and lock the corresponding received electromagnetic wave signal of bay, and all bays receive it is same
Electromagnetic wave beam signal；
S2 semaphore lock: after at least two tracking channels receive and are locked to the electromagnetic wave beam signal, institute is locked
State the channel output signal intensity and carrier phase nco value of at least two tracking channels；
S3 signal compares: the channel strength of the tracking channel locked in real-time monitoring S2, and the signal strength that will test
It is compared with the signal strength of currently used bay A, when wherein a certain signal strength for tracking channel b is greater than currently
When the signal strength of the bay A used, then switching the corresponding bay B of the tracking channel b is currently used day
Linear array member；
S4 calculates carrier phase difference: when switching bay, extract real-time, which goes out in bay A and tracking channel b, to be tracked
The carrier phase nco value of ring, and carrier phase difference between the two is calculated according to the carrier phase nco value of the two；
The switching of S5 bay: when adjusting pulse arrival, switch bay, while the load that S4 is calculated immediately
In the compensation to down coversion DDC module of wave phase difference, bay switching is completed.
Preferably, further include ADC digital-to-analogue conversion process in S1: the tracking channel will receive corresponding antenna array
X electromagnetic wave beam signal in member carries out ADC analog-to-digital conversion process.
Preferably, carrier phase difference compensation is rear in the middle to down coversion DDC module and successively passes through anti-interference process, on DUC
Frequency-variable module and DA output, are finally received by downstream receiver.
A kind of Phase Compensation System based on more array element channel selections, including more than two bays, further include following
Module:
It tracks channel module: one corresponding and independent tracking channel, the tracking is set for each bay
The channel tracking bay received electromagnetic wave signal corresponding with locking, and all bays receive same electricity
Magnetic wave beam signal；
Semaphore lock module: after at least two tracking channels receive and are locked to the electromagnetic wave beam signal, locking
The channel output signal intensity and carrier phase nco value of at least two tracking channel；
Comparison module: locked in real-time monitoring S2 tracking channel channel strength, and the signal strength that will test with
The signal strength of currently used bay A is compared, and is currently made when the wherein signal strength of a certain tracking channel b is greater than
When the signal strength of bay A, then switching the corresponding bay B of the tracking channel b is currently used antenna
Array element；
Calculate carrier phase difference module: switching bay when, extract real-time go out bay A and tracking channel b in
The carrier phase nco value of track ring, and carrier phase difference between the two is calculated according to the carrier phase nco value of the two；
Bay switching module: when adjusting pulse arrival, switching bay immediately, while S4 being calculated
In carrier phase difference compensation to down coversion DDC module, bay switching is completed.
Control module: for controlling the tracking channel module respectively, semaphore lock module, comparison module, calculating carrier wave
Phase difference module and bay switching module；
The tracking channel module and semaphore lock module, calculate carrier phase difference module and bay at comparison module
Switching module is sequentially connected.
It preferably, further include ADC D/A converter module, for the tracking channel will to be received corresponding antenna
Electromagnetic wave beam signal in array element carries out ADC analog-to-digital conversion process, the ADC D/A converter module and the tracking channel mould
Block is connected.
Preferably, further include anti-interference process module, DUC up-converter module and DA output module, array element signal from
Successively pass through the anti-interference process module, DUC up-converter module and DA output module again after the down coversion DDC module output
Finally received by downstream receiver.
Preferably, the control module, down coversion DDC module, anti-interference process module, DUC up-converter module and DA are defeated
Module is all made of fpga chip realization out.
Compared with the existing technology, the present invention is that an independent tracking channel, tracking channel choosing is arranged in each bay
The fixed same wave beam tracks the signal of each bay, when the signal stabilization of bay tracks, monitors each day
The signal strength of line array element signals and real-time carrier phase NCO.When the signal strength of a certain tracking channel is greater than currently used
It when the signal strength of bay, then switches over, the carrier phase nco value of bay before switching is calculated in handoff procedure
With the difference of the carrier phase nco value of switching aft antenna array element, compensate into the array element signal after switching, to keep carrier wave
Phase it is continuous.
Detailed description of the invention
The step of Fig. 1 is a kind of phase compensating method based on more array element channel selections of the invention is schemed.
Fig. 2 is a kind of functional block diagram of the Phase Compensation System based on more array element channel selections of the present invention.
Fig. 3 is a kind of functional block diagram (bay number of the Phase Compensation System based on more array element channel selections of the present invention
For 4).
Fig. 4 is semaphore lock and phase compensation in a kind of Phase Compensation System based on more array element channel selections of the present invention
Functional block diagram.
Specific embodiment
Please refer to Fig. 1-Fig. 4, a kind of phase compensating method based on more array element channel selections, including more than two antenna arrays
Member, further comprising the steps of:
S1: for each bay be arranged a corresponding and independent tracking channel, the tracking channel tracking with
The received electromagnetic wave signal of corresponding bay is locked, and all bays receive same electromagnetic wave beam letter
Number；
S1-1: further including that (Analog-to-digital converter analog-digital converter is for that will simulate to ADC
The continuous signal of form is converted to a kind of equipment of the discrete signal of digital form) digital-to-analogue conversion process: the tracking channel will
The electromagnetic wave beam signal received in corresponding bay carries out ADC analog-to-digital conversion process.
S2: after at least two tracking channels receive and are locked to the electromagnetic wave beam signal, locking described at least two
It is a tracking channel channel output signal intensity and carrier phase NCO (numerically controlled oscillator,
Numerically-controlled oscillator) value；
S3: locked in real-time monitoring S2 tracking channel channel strength, and the signal strength that will test with currently make
The signal strength of bay A is compared, when wherein a certain signal strength for tracking channel B is greater than currently used day
When the signal strength of linear array member A, then switching the corresponding bay B of the tracking channel b is currently used bay, this
In A and B be also to refer to；
S4: when switching bay, extract real-time goes out tracking ring in bay A and tracking channel b and (tracking ring: includes
Carrier wave ring and code ring, are inherently digital phase-locked loops, are carried out to the spreading code and carrier frequency-phase that receive signal accurate
Tracking, it is consistent with reception signal to adjust locally generated spreading code and carrier frequency-phase in real time, has reached the mesh of demodulation
) carrier phase nco value, and carrier phase difference between the two is calculated according to the carrier phase nco value of the two；
S5: when adjusting pulse arrival, switch bay immediately, while the carrier phase difference that S4 is calculated compensates
To in down coversion DDC (Digital Down Converter, Digital Down Convert) module, bay switching is completed.
The compensation of above-mentioned carrier phase difference to down coversion DDC module (generate local carrier in down coversion DDC module, this
Local carrier frequency and phase need consistent with the array element signal received, but bay is during switching,
Since the carrier phase of 2 array element signals is different, the signal after multi-path choice module can generate phase hit, so needing
By in down coversion DDC module local carrier carry out in time be adapted to receive signal carrier occur jump) in after
Pass through anti-interference process, DUC (Digital Up Converter) up-converter module and DA (Digitalto Analog again
Digital analog converter, also known as D/A converter, abbreviation DAC, it is the device for digital quantity being transformed into simulation) output, finally by downstream
Receiver is received.
A kind of Phase Compensation System based on more array element channel selections, including more than two bays, further include following
Module:
It tracks channel module: one corresponding and independent tracking channel, the tracking is set for each bay
The channel tracking bay received electromagnetic wave signal corresponding with locking, and all bays receive same electricity
Magnetic wave beam signal；
Semaphore lock module: after at least two tracking channels receive and are locked to the electromagnetic wave beam signal, locking
The channel output signal intensity and carrier phase nco value of at least two tracking channel；
Comparison module: locked in real-time monitoring S2 tracking channel channel strength, and the signal strength that will test with
The signal strength of currently used bay A is compared, and is currently made when the wherein signal strength of a certain tracking channel b is greater than
When the signal strength of bay A, then switching the corresponding bay B of the tracking channel b is currently used antenna
Array element, A here, B, b are to refer to；
Calculate carrier phase difference module: switching bay when, extract real-time go out bay A and tracking channel b in
The carrier phase nco value of track ring, and carrier phase difference between the two is calculated according to the carrier phase nco value of the two；
Bay switching module: when adjusting pulse arrival, switching bay immediately, while S4 being calculated
In carrier phase difference compensation to down coversion DDC module, bay switching is completed.
Control module: for controlling the tracking channel module respectively, semaphore lock module, comparison module, calculating carrier wave
Phase difference module and bay switching module；
The tracking channel module and semaphore lock module, calculate carrier phase difference module and bay at comparison module
Switching module is sequentially connected.
It further include ADC D/A converter module, for the tracking channel will to be received in corresponding bay
Electromagnetic wave beam signal carry out ADC analog-to-digital conversion process, the ADC D/A converter module and the tracking channel module phase
Even.
It further include anti-interference process module, DUC up-converter module and DA output module, array element signal is from the lower change
Successively pass through the anti-interference process module after the output of frequency DDC module again, DUC up-converter module and DA output module are finally by under
Receiver is swum to receive.
The control module, down coversion DDC module, anti-interference process module, DUC up-converter module and DA output module are equal
It is realized using fpga chip.
Now the present invention will be described so that bay number is 4 as an example:
As shown in figure 3, being arranged one solely for each bay first, it is assumed that 4 bays are Z1, Z2, Z3 and Z4
Vertical reception tracks channel, sets wave of the tracking channel to the same wavelength in corresponding bay of each array element
Shu Jinhang is received；
After the tracking channel locks signal of at least 2 bays Z1, Z2 in 4 channels, then start real-time monitoring
The signal strength of the corresponding tracking channel of bay Z1, Z2；
Assuming that be currently that bay Z1 signal is most strong, by the rotation to antenna, the signal strength of bay Z2 by
Gradually it has been more than bay Z1, then has needed to carry out array element switching
When switching, extract real-time goes out in bay Z1 and bay Z2 tracking channel to track the carrier phase NCO of ring,
And the carrier phase difference between two bay Z1, Z2 signals is calculated in real time；
When adjusting pulse arrival, switch array element immediately, while the carrier phase difference being calculated being compensated to down coversion DDC
In module, bay switching is completed.
The present invention is that an independent tracking channel is arranged in each bay, and tracking channel selectes the same wave beam to each
The signal of a bay is tracked, and when the signal stabilization of bay tracks, monitors the signal of each array element signal
Intensity and real-time carrier phase NCO.When the array element channel of peak signal changes, then switch over, handoff procedure is fallen into a trap
The difference of the carrier phase nco value of bay and the carrier phase nco value of switching aft antenna array element before switching is calculated, compensation is arrived
In array element signal after switching, to keep the continuous of carrier phase.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to of the invention
Some modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (7)
1. a kind of phase compensating method based on more array element channel selections, including more than two bays, which is characterized in that also
The following steps are included:
S1 setting tracking channel: one corresponding and independent tracking channel, the tracking letter are set for each bay
Road tracks and locks the received electromagnetic wave signal of corresponding bay, and all bays receive same electromagnetism
Wave beam signal；
S2 semaphore lock: after at least two tracking channels receive and are locked to the electromagnetic wave beam signal, then described in locking
The channel output signal intensity and carrier phase nco value of at least two tracking channels；
S3 signal compares: locked in real-time monitoring S2 tracking channel signal strength, and the signal strength that will test with work as
The signal strength of the preceding bay A used is compared, when wherein it is a certain tracking channel b signal strength be greater than it is currently used
Bay A signal strength when, then switch the corresponding bay B of the tracking channel b be currently used antenna array
Member；
S4 calculates carrier phase difference: when switching bay, extract real-time, which goes out bay A and tracks, tracks ring in channel b
Carrier phase nco value, and carrier phase difference between the two is calculated according to the carrier phase nco value of the two；
The switching of S5 bay: when adjusting pulse arrival, switch bay, while the carrier wave phase that S4 is calculated immediately
In displacement error compensation to down coversion DDC module, bay switching is completed.
2. a kind of phase compensating method based on more array element channel selections as described in claim 1, which is characterized in that in S1 also
Including ADC digital-to-analogue conversion process: the electromagnetic wave beam signal that the tracking channel will receive in corresponding bay
Carry out ADC analog-to-digital conversion process.
3. a kind of phase compensating method based on more array element channel selections as described in claim 1, which is characterized in that carrier wave phase
Successively pass through anti-interference process, DUC up-converter module and DA output after in displacement error compensation to down coversion DDC module again, finally
It is received by downstream receiver.
4. a kind of Phase Compensation System based on more array element channel selections, including more than two bays, which is characterized in that also
It comprises the following modules:
It tracks channel module: one corresponding and independent tracking channel, the tracking channel is set for each bay
The received electromagnetic wave signal of corresponding bay is tracked and locks, and all bays receive same electromagnetic wave
Beam signal；
Semaphore lock module: after at least two tracking channels receive and are locked to the electromagnetic wave beam signal, described in locking
The channel output signal intensity and carrier phase nco value of at least two tracking channels；
Comparison module: the channel strength of the tracking channel locked in real-time monitoring semaphore lock module, and the signal that will test
Intensity is compared with the signal strength of currently used bay A, when wherein a certain signal strength for tracking channel b is greater than
When the signal strength of currently used bay A, then it is currently used for switching the corresponding bay B of the tracking channel b
Bay；
Calculate carrier phase difference module: when switching bay, extract real-time, which goes out in bay A and tracking channel b, tracks ring
Carrier phase nco value, and carrier phase difference between the two is calculated according to the carrier phase nco value of the two；
Bay switching module: when adjusting pulse arrival, switch bay immediately, while carrier phase difference will be calculated
In the carrier phase difference compensation to down coversion DDC module that module is calculated, bay switching is completed；
Control module: for controlling the tracking channel module respectively, semaphore lock module, comparison module, calculating carrier phase
Difference module and bay switching module；
The tracking channel module and semaphore lock module, comparison module calculate carrier phase difference module and bay switching
Module is sequentially connected.
5. a kind of Phase Compensation System based on more array element channel selections as claimed in claim 4, which is characterized in that further include
ADC D/A converter module, for the electromagnetic wave beam received in corresponding bay to be believed to the tracking channel
Number ADC analog-to-digital conversion process is carried out, the ADC D/A converter module is connected with the tracking channel module.
6. a kind of Phase Compensation System based on more array element channel selections as claimed in claim 4, which is characterized in that further include
Anti-interference process module, DUC up-converter module and DA output module, array element signal are exported from the down coversion DDC module
Pass through the anti-interference process module afterwards and successively, DUC up-converter module and DA output module are finally received by downstream receiver.
7. a kind of Phase Compensation System based on more array element channel selections as claimed in claim 6, which is characterized in that the control
Molding block, down coversion DDC module, anti-interference process module, DUC up-converter module and DA output module are all made of fpga chip reality
It is existing.
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| CN110031797B (en) * | 2019-04-18 | 2020-09-15 | 电子科技大学 | Detection and tracking method for passive sensing system on target with discontinuous characteristic |
| CN117706541B (en) * | 2024-02-06 | 2024-04-16 | 四川省华盾防务科技股份有限公司 | Phased array multi-target tracking method, device, equipment and storage medium |
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