CN104090267B - Synchronous method between digital beam froming submatrix - Google Patents
Synchronous method between digital beam froming submatrix Download PDFInfo
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- CN104090267B CN104090267B CN201410238503.2A CN201410238503A CN104090267B CN 104090267 B CN104090267 B CN 104090267B CN 201410238503 A CN201410238503 A CN 201410238503A CN 104090267 B CN104090267 B CN 104090267B
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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
Synchronous method between a kind of digital beam froming submatrix that the present invention proposes, it is desirable to provide one is simple and reliable, it is little to expend hardware resource, it is possible to eliminate the method for random phase between digital beam froming submatrix.The technical scheme is that: before channels all to Multibeam synthesis array carry out amplitude and phase correction, each Multibeam synthesis submatrix is first done calibration synchronize, utilize calibration to synchronize to obtain the initial phase of each Wave beam forming submatrix direct digital synthesiser DDS；After channels all to Multibeam synthesis array carry out amplitude and phase correction, each channel correction phase place comprises the compensation of the initial phase to above-mentioned Multibeam synthesis submatrix DDS；After digital multiple beam system restarts and powers up, again each Multibeam synthesis submatrix is done calibration and synchronizes, utilize calibration to synchronize to obtain the phase change value this time powered up of each Multibeam synthesis submatrix DDS, this phase change value is compensated each channel corresponding.This invention removes random phase between digital beam froming submatrix.
Description
Technical field
The present invention relates to the synchronous method between the digital beam froming submatrix of a kind of TT & C architecture in Aerospace Tracking & Control.
Background technology
Digital beam forming technology is considered the technology that New Generation Radar must use, and it remains antenna array unit letter
Number full detail, and can use advanced person Digital Signal Processing array signal is processed, it is possible to obtain excellent ripple
Shu Xingneng, readily obtains the performance of super-resolution and Sidelobe, it is achieved beam scanning, self calibration and Adaptive beamformer etc..
In the engineering process of digital beam forming technology, the problem run into specifically includes that volume of transmitted data is too big, more array number
Limit the increase of channel；Arrival bearing estimates and right value update is computationally intensive so that right value update speed is slow, it is impossible to
Use on the carrier of some high-speed motions.When number of arrays is more, the multiple multiplication of high speed real time beam shaper expends more
Resource, in the case of especially needing to form multiple wave beam.Prior art DBF system just runs into data transmission bottle neck problem,
Sampled data can only be transmitted by pci bus, it is impossible to ensures data all real-time Transmission of all channels, thus can only need
Ask the less direction finding of data to work, real time beam can not be done and formed.In order to realize the synchronization of all channels, collection plate all works
Pattern, external sampling clock Complete Synchronization is triggered in external signal.Arrival bearing estimates and right value update calculates by DSP weights
Computing board completes, and each channel data amount that computing needs is usual and little, and ICS554 is total by PCI by direction finding desired data
Line sends DSP weight computing plate to；FPGA Wave beam forming plate to realize the Wave beam forming of full battle array it is necessary to number to each channel
Suing for peace according to complex weighting, obtain final required wave beam, so that transmitted data amount is very big, 4 pieces of ICS554 pass through LVDS
By high speed data transfer to FPGA Wave beam forming plate；After weights have been calculated by DSP weight computing plate, by self-defining
Serial communication is sent to FPGA Wave beam forming plate.The formation of wave beam, after in fact converting A/D exactly, data signal carries out width
Degree and phase weighting, the characteristic of wave beam such as beam position, minor level, main lobe width etc. are determined by weights completely.Weight computing
Factor of both main consideration, first has to each channel is carried out calibration of amplitude and phase, overcomes each channel inconsistent and the impact of mutual coupling,
Then realize airspace filter, complete desired beam position.It is to defend to better meet that full spatial domain electricity sweeps Multi target TT&C system
The multiple target complexity space mission tasks such as star formation flight, space station spacecrafts rendezvous, virtual satellite and the one that proposes possesses many mesh
The new shape TT & C architecture of mark operational management, multiple target observing and controlling tenability simultaneously.Full spatial domain electricity sweep in Multi target TT&C system by
In array element number huge (from thousand of to up to ten thousand), the digital beam froming of its signal generally requires by multiple digital beam froming
Submatrix processing unit forms, the signal of each independent digital beam a part of array element of submatrix processing unit processes.Digital beam shape
Each road signal just can be sampled by the core become, and can be adjusted the phase place of the signal after sampling on demand.?
In order to adjust signal phase in digital signal panel card, need to use built-in direct digital synthesiser DDS to produce mixing letter
Number.This results in a problem, and the phase place of the signal that DDS produces becomes at random with being powered back up signal transacting board every time
Change, therefore exist for a random phase between digital beam froming submatrix, if the phase place of this change at random, signal cannot be eliminated
Digital beam froming just cannot realize.
Summary of the invention
The problem that it is an object of the invention to exist for above-mentioned digital beam forming technology, it is provided that a kind of simple and reliable, consuming
Hardware resource is little, it is possible to eliminate the method for random phase between digital beam froming submatrix.
The technical solution adopted for the present invention to solve the technical problems is: the synchronization side between a kind of digital beam froming submatrix
Method, it is characterised in that comprise the steps: before channels all to Wave beam forming array carry out amplitude and phase correction, first to each many ripples
Bundle forms submatrix and does calibration synchronization, utilizes calibration to synchronize to obtain the initial of each Wave beam forming submatrix direct digital synthesiser DDS
Phase place；After channels all to Multibeam synthesis array carry out amplitude and phase correction, each channel correction phase place comprises above-mentioned multi-beam
Form the compensation of the initial phase of submatrix DDS；After digital multiple beam system restarts and powers up, again to each multi-beam
Form submatrix and do calibration synchronization, utilize calibration to synchronize to obtain the phase place this time the powered up change of each Multibeam synthesis submatrix DDS
Value, compensates by this phase change value for each channel corresponding；Utilize the initial phase value of Multibeam synthesis submatrix DDS with each
Switching on and shutting down are powered back up the random phase value of rear Multibeam synthesis submatrix DDS, obtain the phase of each Multibeam synthesis submatrix DDS
Position changing valueAnd utilizeOffset every secondary device and be powered back up the change at random of rear equipment phase place, complete digital multiple beam
Form the synchronization of submatrix.
The invention has the beneficial effects as follows:
Improve reliability.The present invention make use of the initial phase value of Multibeam synthesis submatrix DDS with each switching on and shutting down again cleverly
Power up the random phase value of rear Multibeam synthesis submatrix DDS, obtain the phase change value of each Wave beam forming submatrix DDS And utilizeOffset every secondary device and be powered back up the change at random of rear equipment phase place, complete formation of the digital multiple beam submatrix
Synchronize, meet the demand of formation of the digital multiple beam system application.Eliminate random phase between digital beam froming submatrix.Solve
Stationary problem between digital beam froming submatrix in TT&C system.
Realization is simple, resource occupation is less.The present invention is utilized to need not complicated circuit, it is achieved method is fairly simple.It is not required to
After device power-on, each array element channel is re-calibrated, it is only necessary to independent each digital multiple beam submatrix is booted up
Synchronize calibration, digital multiple beam submatrix number typically low two orders of magnitude than array element number, therefore use the method to expend the time not
To one of original time-consuming percentage.
Reduce cost.Owing to channel calibration equipment is that digital beam system has to use for equipment, and the present invention utilizes former
There is equipment, do not increase additional firmware, complete the synchronization between formation of the digital multiple beam submatrix, it is not necessary to additionally increase equipment amount and make
With extra hardware, save hardware resource and hardware cost.
The present invention is simple and efficient to handle, it is simple to the Automation Design.Standby start is only done digital beam froming submatrix after powering up and is synchronized
Work without the calibration doing all array element, save the plenty of time.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is that digital beam froming processes schematic diagram.
Fig. 2 is formation of the digital multiple beam system calibration schematic diagram.
Fig. 3 is the synchronization schematic diagram between formation of the digital multiple beam submatrix of the present invention.
Detailed description of the invention
Refering to Fig. 1.In Wave beam forming array, formation of the digital multiple beam submatrix 1... formation of the digital multiple beam
Submatrix nBy all channel array element signals 1... array element signals 1m..., array element signals 1n... array element signals nmBy high speed data transfer to on-site programmable gate array FPGA Wave beam forming
Plate；After the weights of Wave beam forming have been calculated by direct digital synthesiser DSP weight computing plate, led to by self-defining serial ports
Letter is sent to FPGA Wave beam forming plate.According to the present invention, enter using channel calibration equipment channel all to Wave beam forming array
Before row amplitude and phase correction, first each Wave beam forming submatrix is done calibration and synchronizes, utilize calibration to synchronize to obtain each Wave beam forming submatrix straight
Connect the initial phase of digital synthesizer DDS；After channels all to Multibeam synthesis array carry out amplitude and phase correction, each channel
Phase calibration comprises the compensation of the initial phase to above-mentioned Multibeam synthesis submatrix DDS；Restart in digital multiple beam system
After powering up, again each Multibeam synthesis submatrix is done calibration and synchronizes, utilize calibration to synchronize to obtain each Multibeam synthesis submatrix
The phase change value this time powered up of DDS, compensates by this phase change value for each channel corresponding.Guarantee equipment is the most again
After powering up, each array element channel phase compensates uniformity, it is ensured that Wave beam forming is effective.Utilize at the beginning of Multibeam synthesis submatrix DDS
Beginning phase value and each switching on and shutting down are powered back up the random phase value of rear Multibeam synthesis submatrix DDS, obtain each Wave beam forming
The phase change value of submatrix DDSAnd utilizeOffset every secondary device and be powered back up the change at random of rear equipment phase place,
Complete the synchronization of formation of the digital multiple beam submatrix.
Refering to Fig. 2.During digital beam system channel calibration, digital multiple beam channel 1... digital multiple beam channel
nmCalibration is carried out by channel calibration equipment.L to system after calibrationkThe calibration value of channel is this channel signal phase
Place value:Channel calibration equipment is powered back up rear LkChannel phase is changed to:Numeral after powering up
Multibeam synthesis submatrix is synchronized as it is shown on figure 3, L can be obtained after being synchronized by submatrixkChannel phase changesPass through software
Load the change of this phase placeAfter, the L of systemkThe phase place calibration value correspondence of channel is changed to:Therefore lead to
Cross formation of the digital multiple beam submatrix to synchronize, it is ensured that after digital beam froming system is powered back up, equipment normally works.
Claims (5)
1. the synchronous method between a digital beam froming submatrix, it is characterized in that comprising the steps: before channels all to Multibeam synthesis array carry out amplitude and phase correction, each Multibeam synthesis submatrix is first done calibration synchronize, utilize calibration to synchronize to obtain the initial phase of each Wave beam forming submatrix direct digital synthesiser DDS；After channels all to Multibeam synthesis array carry out amplitude and phase correction, each channel correction phase place comprises the compensation of the initial phase to above-mentioned Multibeam synthesis submatrix DDS；After digital multiple beam system restarts and powers up, again each Multibeam synthesis submatrix is done calibration and synchronizes, utilize calibration to synchronize to obtain the phase change value this time powered up of each Multibeam synthesis submatrix DDS, this phase change value is compensated each channel corresponding；The initial phase value of Multibeam synthesis submatrix DDS and each switching on and shutting down are utilized to be powered back up the random phase value of rear Multibeam synthesis submatrix DDS, obtain the phase change value Δ of each Multibeam synthesis submatrix DDS, and utilize the Δ every secondary device of counteracting to be powered back up the change at random of rear equipment phase place, complete the synchronization of formation of the digital multiple beam submatrix.
2. the synchronous method between the digital beam froming submatrix as described in claim 1, it is characterized in that: in Wave beam forming array, formation of the digital multiple beam submatrix 1(DDS 1) ... formation of the digital multiple beam submatrix n(DDS n) by all channel array element signals 1(1) ... array element signals 1 m(m), array element signals 1n(n1) ... array element signals nm(nm) 4 by high speed data transfer to on-site programmable gate array FPGA Wave beam forming plate；After the weights of formation wave beam have been calculated by DSP weight computing plate, it is sent to FPGA Wave beam forming plate by self-defining serial communication.
3. the synchronous method between the digital beam froming submatrix as described in claim 2, it is characterized in that: during digital beam system channel calibration, formation of the digital multiple beam submatrix 1(1), digital multiple beam channel m(m) ... digital multiple beam channel n1(n1), digital multiple beam channel nm(nm) carry out calibration by channel calibration equipment.
4. the synchronous method between the digital beam froming submatrix as described in claim 1, it is characterised in that: L to system after calibrationkThe calibration value of array element signals passage is this channel signal phase value: Lk+ØL, channel calibration equipment is powered back up rear LkChannel phase is changed to: Lk+ØL+ΔØL, wherein: LkIt is the L of systemkThe positive phase to be repaired of array element signals passage,LIt is the initial phase of the l-th Wave beam forming submatrix direct digital synthesiser DDS when channel correcting, ΔLIt is the initial phase bias that is powered back up rear direct digital synthesiser DDS of l-th Wave beam forming submatrix.
5. the synchronous method between the digital beam froming submatrix as described in claim 1, it is characterised in that: submatrix obtains L after synchronizingkChannel phase changes deltaL, load this phase change A by softwareLAfter, LkThe phase place calibration value correspondence of channel is changed to: Lk +ØL+ΔØL。
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| GB201803660D0 (en) | 2018-03-07 | 2018-04-25 | Phasor Solutions Ltd | Improvements in or relating to phased arrays |
| 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 |
| CN112054867B (en) * | 2020-08-30 | 2022-10-28 | 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 |
| 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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| EP0595247A1 (en) * | 1992-10-28 | 1994-05-04 | Atr Optical And Radio Communications Research Laboratories | Apparatus for controlling array antenna comprising a plurality of antenna elements and method therefor |
| US6480154B1 (en) * | 1999-04-07 | 2002-11-12 | Agence Spatiale Europeenne | Method and system for digital beam forming |
| CN101803113A (en) * | 2007-07-20 | 2010-08-11 | 阿斯特里姆有限公司 | System for simplification of reconfigurable beam-forming network processing within a phased array antenna for a telecommunications satellite |
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