CN104090267A - Method for synchronization between digital beam forming sub-arrays - Google Patents
Method for synchronization between digital beam forming sub-arrays Download PDFInfo
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- CN104090267A CN104090267A CN201410238503.2A CN201410238503A CN104090267A CN 104090267 A CN104090267 A CN 104090267A CN 201410238503 A CN201410238503 A CN 201410238503A CN 104090267 A CN104090267 A CN 104090267A
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- submatrix
- phase
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- calibration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention provides a method for synchronization between digital beam forming sub arrays, and aims to provide a method which is simple and reliable, consumes less hardware resources and can eliminate random phase between digital beam forming sub-arrays. The method is realized through the following technical scheme: before amplitude-phase correction on all channels of a multi-beam forming array, calibration synchronization is performed on all multi-beam forming sub-arrays, and the initial phases of direct digital synthesizers DDS of the multi-beam forming sub-arrays are acquired through calibration synchronization; after amplitude-phase correction on all the channels of the multi-beam forming array, each channel correction phase contains compensation to the initial phase of the DDS of the corresponding multi-beam forming sub-array; after a digital multi-beam system is restarted and powered on, calibration synchronization is re-performed on all the multi-beam forming sub-arrays, the phase variations of the DDSs of the multi-beam forming sub-arrays for the powering-on are acquired through calibration synchronization, and the phase variations are compensated to the corresponding channels. By adopting the method of the invention, random phase between digital beam forming sub-arrays is eliminated.
Description
Technical field
The digital beam that the present invention relates to a kind of observing and controlling system in Aerospace Tracking & Control forms the synchronous method between submatrix.
Background technology
Digital beam forming technology be regarded as New Generation Radar the technology that must adopt, it has retained the full detail of antenna array unit signal, and can adopt advanced Digital Signal Processing pair array signal to process, can obtain good wave beam performance, obtain easily the performance of super-resolution and Sidelobe, realize beam scanning, self calibration and adaptive beam formation etc.In the through engineering approaches process of digital beam forming technology, the problem running into mainly comprises: volume of transmitted data is too large, and more array number has limited the increase of channel; Arrival bearing's estimation and right value update calculated amount are large, make right value update speed slow, cannot on the carrier of some high-speed motions, use.When number of arrays is more, the multiple multiplication of Beam-former expends more resource in real time at a high speed, especially needs to form in the situation of a plurality of wave beams.Prior art DBF system just runs into data transmission bottleneck problem, and sampled data can only be transmitted by pci bus, and the data that cannot guarantee all channels are real-time Transmission all, thereby can only do the less direction finding work of demand data, can not do real-time wave beam and form.In order to realize the synchronous of all channels, collection plate is all operated in external signal trigger mode, external sampling clock Complete Synchronization.Arrival bearing estimates and right value update calculating is completed by DSP weights computing board, and each channel data amount that computing needs is conventionally also little, and ICS554 sends direction finding desired data to DSP weights computing board by pci bus; FPGA wave beam forms the wave beam formation that plate will be realized full battle array, will sue for peace to the data complex weighting of each channel, obtains final required wave beam, thereby needs transmitted data amount very large, and 4 ICS554 form plate by high speed data transfer to FPGA wave beam by LVDS; After weights have been calculated by DSP weights computing board, by self-defining serial communication, send to FPGA wave beam and form plate.The formation of wave beam, is exactly digital signal after A/D conversion to carry out amplitude and phase weighting in fact, and the characteristic of wave beam is determined by weights completely as beam position, minor level, main lobe width etc.Weights calculate the main factor of considering two aspects, first will carry out calibration of amplitude and phase to each channel, overcome the impact of the inconsistent and mutual coupling of each channel, then realize airspace filter, complete the beam position of hope.It is a kind of new shape observing and controlling system that possesses multiple goal operational management, multiple goal observing and controlling simultaneously tenability proposing in order to better meet the complicated space mission task of the multiple goals such as satellite formation flying, space station intersection docking, virtual satellite that full spatial domain electricity is swept multiple goal TT&C system.In full spatial domain electricity is swept multiple goal TT&C system due to array element number huge (from several thousand to up to ten thousand), the digital beam formation of its signal often need to form submatrix processing unit by a plurality of digital beams and form, and each is the signal of digital beam submatrix processing unit processes part array element independently.The core that digital beam forms just can be sampled to each road signal, and can adjust on demand the phase place of the signal after sampling.In digital signal panel card, in order to adjust signal phase, need to use built-in direct digital synthesiser DDS to produce mixed frequency signal.This just causes a problem, the phase place of the signal that DDS produces is with signal-processing board card is powered up again at every turn and random variation, therefore digital beam forms between submatrix and just has a random phase, if cannot eliminate the phase place of this random variation, the digital beam of signal forms and just cannot realize.
Summary of the invention
The object of the invention is the problem existing for above-mentioned digital beam forming technology, provide a kind of simple and reliable, to expend hardware resource little, can eliminate the method that digital beam forms random phase between submatrix.
The technical solution adopted for the present invention to solve the technical problems is: a kind of digital beam forms the synchronous method between submatrix, it is characterized in that comprising the steps: all channels of wave beam formation array are being carried out before amplitude and phase correction, first each multi-beam formation submatrix is done to calibration synchronous, utilize calibration synchronously to obtain the initial phase that each wave beam forms submatrix direct digital synthesiser DDS; The all channels of multi-beam formation array are being carried out after amplitude and phase correction, and each channel correction phase place comprises the compensation that above-mentioned multi-beam is formed to the initial phase of submatrix DDS; After digital multiple-beam system restarts and powers up, again each multi-beam formation submatrix is done to calibration synchronous, utilize calibration synchronously to obtain the phase change value this time powering up that each multi-beam forms submatrix DDS, this phase change value is compensated to corresponding each channel; The prima facies place value of utilizing multi-beam to form submatrix DDS powers up with each switching on and shutting down the random phase value that rear multi-beam forms submatrix DDS again, obtains the phase change value that each multi-beam forms submatrix DDS
and utilize
offset the random variation that every secondary device powers up rear equipment phase place again, complete the synchronous of formation of the digital multiple beam submatrix.
The invention has the beneficial effects as follows:
Improved reliability.The prima facies place value that the present invention has utilized multi-beam to form submatrix DDS cleverly powers up with each switching on and shutting down the random phase value that rear multi-beam forms submatrix DDS again, obtains the phase change value that each wave beam forms submatrix DDS
and utilize
offset the random variation that every secondary device powers up rear equipment phase place again, complete the synchronous of formation of the digital multiple beam submatrix, met the demand of formation of the digital multiple beam system applies.Eliminate digital beam and formed random phase between submatrix.Solve digital beam in TT&C system and formed the stationary problem between submatrix.
Realization is simple, resource occupation is less.Utilize the present invention not need complicated circuit, implementation method is fairly simple.Need to after device power-on, to each array element channel, again not proofread and correct, only need to carry out synchronous startup calibration to independent each digital multi-beam submatrix, numeral multi-beam submatrix number, generally than low two orders of magnitude of array element number, is therefore used the method to expend time in less than one of original time-consuming percentage.
Reduced cost.Because channel calibration equipment is the equipment that digital beam system must be used, and the present invention utilizes existing equipment, do not increase additional firmware, complete synchronous between formation of the digital multiple beam submatrix, do not need additionally to increase equipment amount and use extra hardware, having saved hardware resource and hardware cost.
The present invention is simple and efficient to handle, is convenient to the Automation Design.After standby start powers up, only do digital beam and form the calibration work that submatrix synchronously and not needs to do all array elements, save the plenty of time.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the present invention is further described.
Fig. 1 is digital beam formation processing schematic diagram.
Fig. 2 is formation of the digital multiple beam system calibration schematic diagram.
Fig. 3 is the synchronous schematic diagram between formation of the digital multiple beam submatrix of the present invention.
Embodiment
Consult Fig. 1.At wave beam, form in array formation of the digital multiple beam submatrix 1
formation of the digital multiple beam submatrix n
by all channel array element signals 1
array element signals 1m
, array element signals 1n
array element signals nm
by high speed data transfer, arrive on-site programmable gate array FPGA wave beam and form plate; After the weights that wave beam forms have been calculated by direct digital synthesiser DSP weights computing board, by self-defining serial communication, send to FPGA wave beam and form plate.According to the present invention, using channel calibration equipment to carry out before amplitude and phase correction all channels of wave beam formation array, first each wave beam formation submatrix is done to calibration synchronous, utilize calibration synchronously to obtain the initial phase that each wave beam forms submatrix direct digital synthesiser DDS; The all channels of multi-beam formation array are being carried out after amplitude and phase correction, and each channel correction phase place comprises the compensation that above-mentioned multi-beam is formed to the initial phase of submatrix DDS; After digital multiple-beam system restarts and powers up, again each multi-beam formation submatrix is done to calibration synchronous, utilize calibration synchronously to obtain the phase change value this time powering up that each multi-beam forms submatrix DDS, this phase change value is compensated to corresponding each channel.After assurance equipment powers up at every turn again, each array element channel phase compensation consistance, guarantees that wave beam forms effectively.The prima facies place value of utilizing multi-beam to form submatrix DDS powers up with each switching on and shutting down the random phase value that rear multi-beam forms submatrix DDS again, obtains the phase change value that each wave beam forms submatrix DDS
and utilize
offset the random variation that every secondary device powers up rear equipment phase place again, complete the synchronous of formation of the digital multiple beam submatrix.
Consult Fig. 2.During the calibration of digital beam system channel, digital multi-beam channel 1
numeral multi-beam channel nm
by channel calibration equipment, carry out calibration.L to system after calibration
kthe calibration value of channel is this channel signal phase value:
channel calibration equipment powers up rear L again
kchannel phase is changed to:
power up rear formation of the digital multiple beam submatrix as shown in Figure 3 synchronously, can synchronously, obtain L by submatrix
kchannel phase changes
by this phase place of Bootload, change
after, the L of system
kthe phase place calibration value correspondence of channel is changed to:
therefore synchronous by formation of the digital multiple beam submatrix, after can guaranteeing that digital beam formation system powers up again, equipment is normally worked.
Claims (5)
1. a digital beam forms the synchronous method between submatrix, it is characterized in that comprising the steps: all channels of multi-beam formation array are being carried out before amplitude and phase correction, first each multi-beam formation submatrix is done to calibration synchronous, utilize calibration synchronously to obtain the initial phase that each wave beam forms submatrix direct digital synthesiser DDS; The all channels of multi-beam formation array are being carried out after amplitude and phase correction, and each channel correction phase place comprises the compensation that above-mentioned multi-beam is formed to the initial phase of submatrix DDS; After digital multiple-beam system restarts and powers up, again each multi-beam formation submatrix is done to calibration synchronous, utilize calibration synchronously to obtain the phase change value this time powering up that each multi-beam forms submatrix DDS, this phase change value is compensated to corresponding each channel; The prima facies place value of utilizing multi-beam to form submatrix DDS powers up with each switching on and shutting down the random phase value that rear multi-beam forms submatrix DDS again, obtains the phase change value that each multi-beam forms submatrix DDS
and utilize
offset the random variation that every secondary device powers up rear equipment phase place again, complete the synchronous of formation of the digital multiple beam submatrix.
2. by digital beam claimed in claim 1, form the synchronous method between submatrix, it is characterized in that: at wave beam, form in array formation of the digital multiple beam submatrix 1
formation of the digital multiple beam submatrix n
by all channel array element signals 1
array element signals 1m
array element signals 1n
array element signals nm
4 arrive on-site programmable gate array FPGA wave beam by high speed data transfer forms plate; After the weights of formation wave beam have been calculated by DSP weights computing board, by self-defining serial communication, send to FPGA wave beam and form plate by the synchronous method between digital beam formation submatrix claimed in claim 2, it is characterized in that: during the calibration of digital beam system channel, formation of the digital multiple beam submatrix 1
numeral multi-beam channel m
numeral multi-beam channel n1
numeral multi-beam channel nm
by channel calibration equipment, carry out calibration.
3. by digital beam claimed in claim 1, form the synchronous method between submatrix, it is characterized in that: the L to system after calibration
kthe calibration value of array element signals passage is this channel signal phase value:
channel calibration equipment powers up rear L again
kchannel phase is changed to:
4. wherein:
the L of system
kthe positive phase to be repaired of array element signals passage,
the initial phase that L wave beam forms the direct digital synthesiser DDS of submatrix when channel correcting,
that L wave beam forms the initial phase bias that submatrix powers up rear direct digital synthesiser DDS again.
5. by digital beam claimed in claim 1, form the synchronous method between submatrix, it is characterized in that: after submatrix is synchronous, obtain L
kchannel phase changes
by this phase place of Bootload, change
after, L
kthe phase place calibration value correspondence of channel is changed to:
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| CN201410238503.2A CN104090267B (en) | 2014-05-30 | 2014-05-30 | Synchronous method between digital beam froming submatrix |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633568A (en) * | 2018-12-20 | 2019-04-16 | 南京理工大学 | Digital array radar Beam-former design method based on optical fiber interface |
| CN112054867A (en) * | 2020-08-30 | 2020-12-08 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Large-scale digital array signal synchronous acquisition system |
| CN112986919A (en) * | 2021-02-10 | 2021-06-18 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | High-density DBF multi-path multi-target signal processing device |
| US11316269B2 (en) | 2018-03-07 | 2022-04-26 | Hanwha Phasor Ltd. | Method of providing time alignment between phased arrays for combined operation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11316269B2 (en) | 2018-03-07 | 2022-04-26 | Hanwha Phasor Ltd. | Method of providing time alignment between phased arrays for combined operation |
| CN109633568A (en) * | 2018-12-20 | 2019-04-16 | 南京理工大学 | Digital array radar Beam-former design method based on optical fiber interface |
| CN109633568B (en) * | 2018-12-20 | 2023-01-13 | 南京理工大学 | Design method of all-digital array radar beam former based on optical fiber interface |
| CN112054867A (en) * | 2020-08-30 | 2020-12-08 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Large-scale digital array signal synchronous acquisition system |
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| CN112986919A (en) * | 2021-02-10 | 2021-06-18 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | High-density DBF multi-path multi-target signal processing device |
| CN112986919B (en) * | 2021-02-10 | 2023-08-18 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | High-density DBF multipath multi-target signal processing device |
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| CN104090267B (en) | 2016-06-29 |
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