CN105572641B - A kind of on-line reorganization formula is wide/the general radar source in narrowband and its production method - Google Patents
A kind of on-line reorganization formula is wide/the general radar source in narrowband and its production method Download PDFInfo
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- CN105572641B CN105572641B CN201510906268.6A CN201510906268A CN105572641B CN 105572641 B CN105572641 B CN 105572641B CN 201510906268 A CN201510906268 A CN 201510906268A CN 105572641 B CN105572641 B CN 105572641B
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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
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Abstract
The invention belongs to radar emission signal generation technology field, more particularly to a kind of on-line reorganization formula it is wide/the general radar source in narrowband and its production method.The radar signal that the digital units one of the present invention are general generates platform, can be needed to generate the variable broadband of many kinds of parameters or the narrow band signals such as frequency, bandwidth, time width, modulation format according to radar complete machine.The present invention improves the versatility of radar source, it is made to have good portable and scalability, by the different parameter of Configuration Online without changing hardcore, the transformation of the complex parameters such as multi-mode, multi-frequency, the more waveforms of radar work can be completed, development cost is saved, reduces developing risk.
Description
Technical field
The invention belongs to radar emission signal generation technology field, more particularly to a kind of on-line reorganization formula it is wide/narrow bandpass
With radar source and its production method.
Background technology
With the development of Modern Electronic Countermeasure technology, the target electromagnetic environment coped with needed for radar is increasingly complicated, especially
Seem more urgent to the differentiation of unknown air intelligence, radar not only wants lockon and follow target, also needs to classify to target, identify
And imaging, while should have and fast reaction, the ability for converting appropriate working modes are carried out according to battlefield situation；And with radar
The expansion upgrading of model is developed, needs to develop various corresponding mating radar sources, this has been resulted in, and development multiplicity is high, resource is unrestrained
Take larger, therefore, seemed particularly urgent for the demand in general, restructural width/Narrow-band Radar source.Currently used radar
Source is come " customized " mostly according to specific radar demand, and function is single, transplantability is poor, and upgrading extension is relatively difficult.
Application No. is CN201210288227's《Automobile centralization body electronics controller function and parameter Configuration Online side
Method》It is related to on-line reorganization technology, but only relates to the method being adjusted online to parameter, is realized without reference to radar system
The application of line reconstruct.Application No. is CN02806591's《It applies and is combined with broadband transmission in narrowband》It is related to wide band narrow band mutually to tie
It closes, but it is mainly combined with broadband using narrowband ability and realizes a kind of transmission mode, with utilizing broadband and narrow in this scheme
Band combination technology, which generates radar signal, notable difference.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of on-line reorganization formula it is wide/the general radar source in narrowband and its production
Generation method.The general radar signal of digital units one of the present invention generates platform, can be needed to generate according to radar complete machine frequency,
The variable broadband of many kinds of parameters such as bandwidth, time width, modulation format or narrow band signal, have the characteristics that：A, on-line reorganization：It need not
Offline can be completed reconfigures system many kinds of parameters, can facilitate the multiple-working mode for realizing radar, give full play of
The fighting efficiency of radar；B, versatility, portability：Product has fully considered the application in different radars, devises
Parameters revision function, can the inconsistency of parameter be modified between multiplexer channel by Interface Controller so that product has
Versatility and portability；C, width/narrowband is combined：Product can be independently operated on broadband mode or narrow band mode, also can two
Kind pattern works at the same time, and integrated level is high, flexibility is good, Electro Magnetic Compatibility is strong, can meet the need of radar width pattern joint-detection
It asks；D, digitlization, intelligence：Thought of the product based on software radio employs Design of digital theory, reduces function list
First, the circuit of poor repeatability；It emphasizes the opening of system and comprehensive programmability, new work(can be realized by the upgrading of software
It can be configured, without changing hardcore so that product is more intelligent.
The technical scheme is that：In design based on software radio thought, by digital units and analogue unit work(
It can be independent.
Digital units are mainly by ultrahigh speed ultra wide band DDS, high-speed DAC, DSP, FPGA, FLASH, SRAM and communication interface
Deng composition.Using high speed FPGA as data processing core, required broadband or narrowband control data are generated, are respectively supplied to superelevation
Fast DDS and high-speed DAC；DSP carries out communication link as control process center by its SPI interface and CAN interface.Carry out
During parameters revision pattern, the error of parameters is obtained by test first, batch file is formed, then passes through the CAN of radar source
Communication interface carries out data loading and preserves；FPGA can be according to the command calls of the system data file, and controls and post accordingly
Storage completes the automatic amendment of parameter.
Analogue unit includes clock modulate circuit, narrowband filtering and amplifying circuit, broadband filtering and amplifying circuit, port match electricity
Road, narrowband filtering and amplifying circuit and broadband filtering and amplifying circuit are made of respectively transformer, amplifier and bandpass filter, logarithm
Wave detector carries out coupling detection to the signal of output, and fpga chip is transmitted a signal to after comparator for condition adjudgement；
The required three kind clock signal that clock conditioning unit obtains the reference signal of input by processing first passes through reference signal
After crossing amplification, filtering, work(point, all the way as fpga chip clock；Ten frequency multipliers are given on second tunnel, the conduct after amplification filters
30 frequency multipliers are given on the clock of high-speed d/a, third road, and DDS clocks are used as after amplification filters.
The digital units for being the present invention are waveform generation module, are the cores of the present invention, use high speed FPGA
Ultra wide band DDS is added to add the scheme of high-speed DAC, on the one hand directly generates up to 1.6G using the ultrahigh speed ultra wide band characteristic of DDS
The drawbacks of signal of bandwidth, the chirp rate linearity for overcoming traditional frequency multiplication mode spread bandwidth and bringing is bad defect.Together
Shi Caiyong waveform libraries and digital local oscillator technology, are stored in waveform library after any sophisticated signal is quantified by base band, are read when needing
And mixing operations are carried out with digital local oscillator in FPGA, the waveform of required form is then obtained by high-speed DAC.This wide and narrow strip
The mode being combined fully extends the application range of radar source, and shares FPGA, has saved hardware resource.The simulation
Unit is quick release module, the nothing according to the difference of required radar source signal frequency range replacement corresponding analogue unit module
Hardcore need to be changed, you can realize a variety of applications in centralized system or distributed radar, be radar new product
Rapid development and the upgrading of old product provide general hardware platform, shorten the development cycle, reduce technical risk.
The invention also discloses a kind of on-line reorganization formula it is wide/production method of the general radar source in narrowband, include the following steps：
The control signal for coming from system is input to waveform generation module, and waveform generation module is decoded control signal
Analysis, the parameter calls Waveform storage moulds such as frequency, waveform, pulsewidth, period, phase, the amendment margin of error according to required by signal
The narrow band data of block either directly generates corresponding wideband data and generates narrowband letter by D/A converter or ultra wide band DDS
Number or broadband signal；
According to the difference of the radar source signal frequency range of generation, corresponding narrowband filtering and amplifying circuit and broadband amplification filter are replaced
Wave circuit；
Narrow band signal is connect through high speed D/A converter with narrowband filtering and amplifying circuit generates narrow band waveform, broadband signal
It is connect through ultra wide band DDS with broadband filtering and amplifying circuit and generates broadband waveform.
The beneficial effects of the invention are as follows：The versatility of radar source is improved, it is made to have good portable and can expand
Malleability, by the different parameter of Configuration Online without changing hardcore, you can complete multi-mode, the multifrequency of radar work
Development cost is saved in the transformation of the complex parameters such as rate, more waveforms, reduces developing risk.
Description of the drawings
Fig. 1 is composition frame chart of the present invention；
Fig. 2 is power conversion unit composition frame chart of the present invention；
Fig. 3 is clock conditioning unit composition frame chart of the present invention；
Fig. 4 is principle of the invention block diagram.
Specific embodiment
Below in conjunction with attached drawing, the present invention is further described.
The mark of each element in fig. 1 illustrates and effect is as follows：
The present invention include microcontroller dsp chip, programmable controller fpga chip, D/A converter, ultrahigh speed DDS,
FLASH chip, sram chip, CAN interface, RS422 interfaces, EEROM, transformer, amplifier, bandpass filter, logarithmic detector
Device, comparator, power conversion unit, clock conditioning unit.
1st, microcontroller dsp chip：Using the LPC2292 of PHILIPS companies, LPC2292 has multiple 32 bit timing devices,
The CAN interface that 2 tunnels can interconnect, 4 10, tunnel A/D converters, 12 external interrupt pins.DSP is connected with FLASH, on the one hand will
The Wave data deposit needed to configure wherein, while reads corresponding data according to monitoring system order；DSP also with FPGA phases
Even, the data read from FLASH are given to FGPA processing；The CAN mouths and SN65HVD230 of DSP, realizes various orders
Execution.
2nd, programmable controller fpga chip：The EP2C35F484 chips of II series of Cyclone are employed, inside has
33216 logic units, 105 4K amount of storage RAM.FPGA is connected with DSP, and the DSP data read are kept in internal RAM；
FPGA is connected with 4 SRAM, and data partition of the inter-process after complete is stored in this 4 SRAM；FPGA and ultrahigh speed DDS phases
Even, it would be desirable to broadband signal data and corresponding control signal be sent in DDS；FPGA is connected with high-speed DAC, it would be desirable to
Narrow band signal data and corresponding control signal be sent in DDS.
3rd, high-speed d/a converter (DAC)：Using the AD9779A of ADI companies, it is 16 D/A of binary channels, sampling rate
Up to 1GSPS.DAC with data line be connected with 4 SRAM and FPGA, carry out DA conversions to selecting required narrow band data, obtain
To corresponding narrow band analog signals；The output terminal of DAC is differential signal, gives transformer ETC1-1-13 and carries out single-ended conversion.
4th, ultrahigh speed DDS：The DS856HS chips of EUVIS companies are selected, it is a superfast DDS, maximum clock
Frequency has 32 bit frequency control words (FTW), 13 phase control words and 11 D/A, frequency hopping speed is fast, frequency up to 3.2GHz
Rate high resolution.The up to signal of 1.6GHz can be directly exported, it is one huge that this performance is compared with traditional DDS chips
Breakthrough.DDS inputs are wideband data and corresponding register control signal from FPGA, generate required ultra wide band
Transformer ETC1-1-13 is given after signal and carries out single-ended conversion.
5th, flash memory FLASH chip：Using the TE28F320C3 of Intel Company, size is 2M × 16.Its data line,
Address wire is connected with dsp chip, and data will not be lost after power down.
6th, sram chip：Using the IS61WV102416 of 4 ISSI companies, size is 1024K × 16,4 SRAM
Chip is connected in parallel, and respectively has 1 chip-select pin to be connected to fpga chip, by controlling the chip selection signal can be to different SRAM
Chip is operated.All data lines, address wire are connected with FPGA and data line is also connected with DAC, in order that can be quick
Ground carries out reading and writing data, improves the speed that waveform generates.
7th, communication interface uses CAN interface：Using the SN65HVD230 of TI companies, one end is connected with DSP, the other end and prison
Control platform is connected, and is mainly used to load data, be communicated with control and monitor console.
8、EEROM：It is three kinds of a kind of collection house dog, voltage monitoring and serial EEPROM using the X5043 of Xicor companies
The programmable control circuit of function.X5043 is connect by SPI interface with DSP, is mainly used for each replaceable list of storage
The parameters such as sequence number, the date of production, the cumulative operation time of member, the inquiry of guarantee easy to repair.
9th, RS422 interfaces：Using the AM26LV32 of TI companies, by parameter control signal by differential conversion into after single-ended signal
Fpga chip is given, be decoded analysis to it in fpga chip and controls corresponding logic unit.
10th, crystal oscillator：Using the SG-8002JC-STC-12MHz of EPSON companies, frequency stability is high, is provided to dsp chip
Local work clock.
11st, transformer：Using the ETC1-1-13 of M/A-com companies, Insertion Loss is low, wide frequency range, and one is connected with DDS,
Another is connected with DAC, and the DAC and DDS differential signals exported are converted into 50 ohm of matched single-ended signals.
12nd, amplifier：Using the ERA-3SM of MINI companies, which has the characteristics that broadband, low noise, good linearity,
It is connected with transformer ETC1-1-13, good Linear Amplifer is carried out to transformed single-ended small-signal.
13rd, power conversion unit：
As shown in Fig. 2, power conversion unit is made of four kinds of integrated regulators：The first integrated regulator uses ONSEMI
+ 15V voltages are converted into+12V voltages by the MC78M12BDTG of company；Second of integrated regulator is using Linear companies
+ 5.5V voltages are converted into+3.3V voltages by LT1086IM-3.3；The third integrated regulator is using Linear companies
+ 3.3V voltages are converted into+1.8V voltages by LT1763CS8-1.8；4th kind of integrated regulator is using Linear companies
- 5.5V voltages are converted into -5V voltages by LT3015.6 voltage-stablizers are low-dropout regulator, avoid introducing electricity in the circuit board
Source switch frequency signal.
17th, clock conditioning unit：
As shown in figure 3, clock conditioning unit obtains the 100MHz reference signals of input needed for the invention by processing
Three kinds of clock signals, are designed as standalone module, and whole replace without changing again always can be carried out according to different needs
Body circuit design, flexibility is strong, applicability is high.Reference signal is subjected to work(after amplification filters to one point of three power splitter first
Point, all the way as fpga chip clock, another way gives ten frequency multipliers, and 10 rd harmonic signals of output are made after amplification filters
For DAC clocks, third road gives thirtyfold frequency device, DDS clocks is used as after the 30 rd harmonic signals amplification filtering of output.
Below in conjunction with attached drawing 4 and specific embodiment, the present invention is further described.
One embodiment of the present of invention has been carried out on certain radar.The clock signal of embodiment input is 100MHz,
After oversampling clock conditioning unit generate 100MHz as FPGA clocks, generate 1GHz signals as DAC clock, generation
Clock of the 3GHz signals as DDS, it is desirable that generate two class signals：One kind is broadband signal, and pulsewidth is from 10us~700us, period
300us~3ms, the linear FM signal of bandwidth 10MHz~300MHz；Another kind of is narrow band signal, pulsewidth from 0.5us~
The NLFM signal and phase-coded signal of 700us, period 300us~3ms, bandwidth 1MHz~10MHz；And require arteries and veins
Width, the period, bandwidth, phase can according to require carry out on-line tuning.
First, according to the background of radar application, required main signal type is counted, if linear frequency modulation
Signal is directly generated by DDS, and the waveform of frequency modulation characteristic complexity then generates corresponding base band number by MATLAB software emulations
According to file, the FLASH that mould DSP in the block is loaded into waveform memory module is combed by data by the CAN interface of communication module.
After the power is turned on, all data in FLASH are carried out 4 of partitioned storage in waveform memory module by DSP by FPGA first
Inside SRAM；The DSP that communication module is sent in data processing module is passed through in the order for coming from control and monitor console, and DSP is to the order
Analysis is decoded according to agreement, according to required frequency, waveform, pulsewidth, the period, phase, corrects the parameters such as the margin of error
Difference calls the narrow band data of waveform memory module or directly generates corresponding wideband data.
Bandwidth 300MHz, pulsewidth 800us, period 3ms, centre frequency 700MHz, just are generated assuming that monitor command is requirement
The wideband correlation that beginning phase is zero.FPGA in data processing module is calculated according to these information, generate and
The frequency control word of clock synchronization, phase control words give DDS, and corresponding initial frequency point is 550MHz, phase 0, and FPGA is not
Disconnected control stepping data output is 850MHz, while using the control of timer performance period until terminating frequency, after DDS
Differential signal be sent to broadband amplification filter module in transformer, become again to amplify after single-ended voltage signal, filter, so as to
Realize the generation of the wideband correlation.
If monitor command is requirement generate bandwidth 3MHz, pulsewidth 800us, period 3ms, centre frequency 20MHz it is non-thread
Property FM signal.FPGA in data processing module is read inside the SRAM in waveform memory module corresponding to this signal
Then data carry out Digital Up Convert in FPGA, give data to DAC later, while using the control of timer performance period
System, the differential signal after DAC are sent to the transformer in narrowband amplification filter module, are put again after becoming single-ended voltage signal
Greatly, it filters, it is achieved thereby that the generation of the NLFM signal.
If having used multiple modules in phased-array radar, due to cable connection and circuit characteristic reason or
It can also be needed under person's different batches different temperatures there are the various errors such as phase, amplitude, time delay to initial frequency control word and phase
The parameters such as position are modified.The error of parameters is obtained by test first, these corrected parameters are carried out coding forms phase
The data file answered is loaded by the CAN interface in communication module in the FLASH in memory module, in practice as needed
It calls different parameters that these corrected parameters and Wave data are carried out sequential and logical process to FPGA, FPGA, is formed final
Wave data to DAC or DDS, you can realize the amendment of parameter and the on-line reorganization of waveform.
Claims (1)
1. a kind of on-line reorganization formula is wide/production method of the general radar source in narrowband, it is characterised in that：Include the following steps：It comes from
Waveform generation module is input in the control signal of radar system, waveform generation module is decoded analysis to control signal, such as
Wideband correlation need to be generated, is directly generated by ultrahigh speed DDS；If needed for radar being NLFM signal,
Data processing module reads the corresponding baseband waveform data of desired signal from waveform memory module, is carried out numerically in FPGA
Frequency conversion gives data to DAC later, so as to fulfill the generation of complex FM signal；If multiple on-line reorganizations are used in radar
Formula is wide/the general radar source in narrowband, the consistency between each radar source is needed to be modified, data processing module by corrected parameter into
Row sequential and logical process form final Wave data to DAC or DDS, realize the automatic amendment in Multichannel radar source；
According to the difference of the radar source signal frequency range of generation, corresponding narrowband filtering and amplifying circuit and broadband amplification filtered electrical are replaced
Road, analogue unit are quick release modules, and corresponding analogue unit is replaced according to the difference of required radar source signal frequency range
Module is without changing hardcore.
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| CN106855733A (en) * | 2016-12-21 | 2017-06-16 | 中国航空工业集团公司雷华电子技术研究所 | A kind of digital receiver waveform table method for parameter configuration |
| CN107479035B (en) * | 2017-07-13 | 2020-04-10 | 西安空间无线电技术研究所 | Broadband linear frequency modulation signal real-time generation method based on FPGA and DAC |
| CN107607925B (en) * | 2017-09-07 | 2020-07-14 | 西安电子工程研究所 | Target RCS real-time evaluation method for radar application |
| CN111756389B (en) * | 2018-11-30 | 2021-08-10 | 成都德辰博睿科技有限公司 | Multi-channel digital signal processing method and device based on FPGA (field programmable Gate array), computer equipment and storage medium |
| CN110221261B (en) * | 2019-06-28 | 2023-01-06 | 中国航空工业集团公司雷华电子技术研究所 | Radar waveform generation module test analysis method and device |
| CN110677170B (en) * | 2019-09-18 | 2022-06-17 | 湖南智领通信科技有限公司 | Ad hoc network communication device and method with wide-band and narrow-band integration |
| CN112198492B (en) * | 2020-10-21 | 2023-09-19 | 武汉滨湖电子有限责任公司 | Method for generating real-time on-line reconstruction waveform by array radar multichannel waveform |
| CN112255593B (en) * | 2020-10-21 | 2024-01-23 | 武汉滨湖电子有限责任公司 | Variable frequency assembly for target classification recognition radar |
| CN112363138B (en) * | 2020-10-29 | 2023-08-25 | 武汉滨湖电子有限责任公司 | Frequency conversion assembly implementation method for target classification recognition radar |
| CN113671495B (en) * | 2021-08-18 | 2024-02-23 | 上海无线电设备研究所 | Terahertz radar detection system and method based on Zynq platform |
| CN114488033B (en) * | 2022-04-14 | 2022-06-24 | 南京信息工程大学 | Multi-channel time-frequency accumulation processing method for instantaneous broadband multi-frequency composite radar signals |
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