CN107678014A - Software radio is in cognition passive radar system and implementation method - Google Patents
Software radio is in cognition passive radar system and implementation method Download PDFInfo
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- CN107678014A CN107678014A CN201710729868.9A CN201710729868A CN107678014A CN 107678014 A CN107678014 A CN 107678014A CN 201710729868 A CN201710729868 A CN 201710729868A CN 107678014 A CN107678014 A CN 107678014A
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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
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
Abstract
The invention belongs to passive radar field, and for software and radio technique is introduced into passive radar system, the structure for the cognition passive radar system of multi-standard multisystem compatible provides new solution route.The technical solution adopted by the present invention is that software radio includes in cognition passive radar system, structure：Signal generator and radio-frequency antenna, for launching electromagnetic wave, simulate external sort algorithm signal；The VHS ADC multichannel analog-to-digital conversion boards of Lyrtech Software Radio platforms, high speed acquisition is carried out for external emitter Signals；DRC interface boards, DRC modules can carry out the digital data transmission of high speed between support plate；FPGA is as LTE Baseband Processing Unit, for developing simultaneously testing signal process algorithm；Data treated FPGA carry out man-machine interaction by cpci bus and development environment MATLAB/Simulink/LSP/VC++；Present invention is mainly applied to passive radar to manufacture and design occasion.
Description
Technical field
The invention belongs to passive radar field, specifically, is related to application of the software radio in passive radar system is recognized
Method.
Background technology
Passive radar system and the difference of conventional radar are that its own does not launch electromagnetic wave, but utilize outside spoke
Penetrate source target is detected and followed the trail of, because this characteristic so that passive radar has preferably disguised and anti-interference, anti-
Low-level penetration, Anti-antiradiation missile, anti-stealthy " four is anti-" ability, and frequency spectrum distribution need not be carried out, it will not also produce electromagnetism
Pollution.Because radar itself only needs to have receiving ability, system has the characteristics that portable.With the development of radio communication, grind
Study carefully personnel and be just directed to explorative research of the broadband wireless communications irradiation source in passive radar.Based on this, following passive radar shines
The source of penetrating will show the characteristics of complicated isomery, and the passive radar system of single system is by by very big restriction.It is therefore proposed that one
The passive radar framework of kind multi-standard multi-standard compatibility, effectively solve the problems, such as that radar illumination source complexity isomery turns into research heat
Point[1]。
Simon Hykin propose the concept of cognitive radio being introduced into radar system first, and this cognition radar should
Possesses the continuous ability for perceiving environment, quick adjustment systematic parameter and fast digital information processing.If by the concept of cognition
Passive radar is introduced, and receiver can work in wider frequency range, then and passive radar system can pass through intelligent
The process of habit, according to perception of the system to environment, automatic identification irradiation source storehouse simultaneously selects optimal irradiation source to be analyzed, so as to
The multi-standard multi-standard compatibility to irradiation source is realized, effectively solves the problems, such as following passive radar system irradiation source complexity isomery.
The Software Radio platform of Lyrtech companies exploitation, it is possible to achieve the algorithm development based on DSP and FPGA, realize to signal
Collection and sampling.The radio (Software Defined Radio, SDR) of software definition is a kind of radio broadcasting communication
Technology, it is wireless communication protocol based on software definition rather than realized by hardwired, that is to say, that its frequency band, sky
Middle interface protocol and function can newly arrive upgrading by software download and more, without changing hardware completely.SDR can be reprogramed
Or reconfigure, so as to different waveforms and agreement can be used to operate by the new waveform of dynamic load and agreement[2]。
The concept for recognizing radar is introduced into passive radar system by Michael Inggs et al..In passive radar, utilize
Frequency spectrum perception finds the larger frequency resource of power spectral density, is used as the irradiation source of passive radar.Software wireless level
Platform can change inherent parameters according to the parameter of reception signal, to realize detection and tracking to unlike signal.Accordingly, it would be desirable to
A kind of broadband cognitive passive radar system architecture of the multi-standard multisystem compatible based on software radio framework is proposed, can basis
Environmental feedback and priori select optimal irradiation source, and adjust inherent parameters, improve systematic function[3]。
[1]N J Willis,Bistatic radar,USA:Artech House,1991.15-57
[2] Cheng Wei, Zuo Jizhang, Xu Yuelei, grinding for signal of communication processing platforms of the sincere man of virtue and ability based on software radio architecture is finished
Microelectronics processed and computer, 2003,20 (8)
[3] passive radar theory and system research (Doctoral of (2010) in Wangqing County based on WiMAX
Dissertation, University Of Tianjin).
The content of the invention
It is more it is contemplated that software and radio technique is introduced into passive radar system for overcome the deficiencies in the prior art
The structure of the cognition passive radar system of standard multisystem compatible provides new solution route.The technical solution adopted by the present invention
It is that software radio includes in cognition passive radar system, structure：
Signal generator and radio-frequency antenna, for launching electromagnetic wave, simulate external sort algorithm signal；
The VHS-ADC multichannel analog-to-digital conversion boards of Lyrtech Software Radio platforms, enter for external emitter Signals
Row high speed acquisition；
DRC interface boards, for, using transmitting to FPGA, DRC to be Lyrtech expanded mode by the signal collected
Block, DRC modules can carry out the digital data transmission of high speed between support plate；
FPGA is as LTE Baseband Processing Unit, for developing simultaneously testing signal process algorithm；
Data treated FPGA enter pedestrian by cpci bus and development environment MATLAB/Simulink/LSP/VC++
Machine interacts；
FPGA includes：
FPGA high-speed AD acquisition module, a certain external sort algorithm signal is sampled；
Spectrum analysis module, spectrum analysis is carried out to collection signal, obtains its related frequency domain information；
Bandpass filtering modules block, the frequency of bandpass filter and amplitude is set to limit parameter according to the result of spectrum analysis, will
Obtained sampled signal carries out bandpass filtering；
Demodulation, decoding and related process module, for based on SECO, being demodulated, decoding to the signal after obtaining
And relevant treatment, finally carry out frequency spectrum playback.
The features of the present invention and beneficial effect are：
The present invention intends exploring application of the software radio in passive radar system is recognized, and have studied based on software radio
The Sampling techniques of the signal of technology.First with Lyrtech companies exploitation Software Radio platform carry out signal collection with
Sampling.The target range vector detection based on matched filtering is subsequently completed, having for target observation algorithm of simulation results show
Effect property.Software-defined radio concept is incorporated into passive radar system, is the cognition passive radar system of multi-standard multi-standard compatibility
The realization of system provides possibility.
Brief description of the drawings：
Fig. 1 Software Radio platform pictorial diagrams.
Fig. 2 internal systems connect configuring condition.
Fig. 3 present systems handle block schematic illustration.
Fig. 4 flow charts of the present invention.
The signal spectrum figure that Fig. 5 software radios collect.
Embodiment
The invention belongs to passive radar field, the cognition passive radar system architecture based on software radio thought, it has
Environment sensing ability, the ability in sampling of big bandwidth, high performance digital signal processing capability and dynamic adjustment receiver parameters energy
Power, the realization for the cognition passive radar system of multi-standard multi-standard compatibility provide possibility.
Software and radio technique is introduced passive radar system by the present invention, is the passive thunder of cognition of multi-standard multisystem compatible
Structure up to system provides new solution route.Frequency band, air interface protocol and the function of Software Radio platform can lead to
Software download is crossed and upgrading of more newly arriving, without changing hardware completely.It can thus realize that same passive radar system can be with
Irradiation source based on different parameters is operated, the passive thunder of cognition of this multi-standard multisystem compatible namely truly
Up to system.At present, the higher Software Radio platform of integrated level occurs, such as the software of Lyrtech companies exploitation
Radio platforms, it can be used for being tested, system handles framework as shown in figure 3, detailed technology scheme is as follows；
The first step：Launch electromagnetic wave by NI PXle-5611 signal generators and by radio-frequency antenna, it is outer for simulating
Emitter Signals.
Second step：Using the VHS-ADC multichannel analog-to-digital conversion boards of Lyrtech Software Radio platforms to external sort algorithm
Signal carries out high speed acquisition, and flank speed is up to 105MSPS.If want to extend AD acquisition channels, using the ADC- of platform
Module multichannels change daughter board, and acquisition channel is extended into 16 passages.
3rd step：The signal collected is transmitted to FPGA SignalMaster Quad modules using DRC interface boards.
DRC is Lyrtech LYRIO+ expansion module, for there is the extension of LYRIO+ support plates.DRC modules can with support plate it
Between carry out high speed digital data transmission.
4th step：Using SignalMaster Quad modules (FPGA is integrated on plate) as LTE Baseband Processing Unit, for developing simultaneously
Testing signal process algorithm.
5th step：Processing data is carried out by cpci bus and development environment (MATLAB/Simulink/LSP/VC++)
Man-machine interaction.
The external sort algorithm signal used for passive radar system, first by Software Radio platform to spatial electromagnetic ring
Border is perceived, and perceives the useful signal available for target detection, is carried out spectrum analysis afterwards and is obtained useful information, further divides
Its ambiguity function, Cramér-Rao lower bound etc. are analysed, its processing procedure is as shown in Figure 3.The present invention is based on Lyrtech Software Radio platforms
The main spectrum analysis realized to external sort algorithm, has subsequently completed the target range vector detection based on matched filtering.
LSP system development platform, it is mainly used in emulation, fast verification and the realization of algorithm.Used in system
SignalMaster Quad are as LTE Baseband Processing Unit, and multi-DSP and FPGA are as primary processor.It is summed up, for LSP's
Development process, mainly how these processors are directed to, carry out the exploitation based on model.It can be divided into for DSP exploitations and pin
Exploitation to FPGA.Mainly specific development process such as Fig. 4, it is described in detail as follows using the exploitation for FPGA herein：
The first step：FPGA high-speed AD acquisition module is opened, a certain external sort algorithm signal is sampled.
Second step：Spectrum analysis is carried out to the collection signal, obtains its related frequency domain information, spectrogram is as figure 5 illustrates.
3rd step：The frequency and amplitude limitation parameter of bandpass filter are set according to the result of spectrum analysis, by what is obtained
Sampled signal carries out bandpass filtering.
4th step：Based on SECO, the signal after obtaining is demodulated, decoded and relevant treatment, finally enters line frequency
Spectrum playback.
For FPGA exploitation details of use, the present invention is also given based on the specific of Lyrtech Software Radio platforms
It is as follows using step.
1. open model
Simulink allocation models is used to first and generates FPGA code.The first step is to be opened in Simulink
One model.Model mainly includes two parts of configuration section and model treatment.Configuration section must include system
Two parts of generator and FPGA board configuration.Because the two parts are configured with FPGA compiling letters
Breath.The process part of FPGA models refers to that user utilizes the various algorithms of module design, is configured according to user's needs
, the composition of this part includes Xilinx modules (blueness), Lyrtech I/O modules (grey), Simulink module (in vain
Color).Wherein, the data of Xilinx processing are typically fixed-point data, and Simulink resume modules are typically double-precision floating point type
Data are, it is necessary to there is Gateway and Gateway out models to convert the different types of data of this two parts.
2. allocation models
For FPGA, it is not necessary to special configuration is carried out to Simulink, before target is compiled, it is only necessary to confirm
Whether SignalMaster Quad Virtex-4 MBDK FPGA are had added to inside System Generator.When
Hardware board is successfully added, then Signal Master Quad can be seen in System Generator compiler listings
Virtex-4.And two parts of system generator and FPGA board configuration need to configure.Tool
Body is configured to：
Configured for system generator modules as follows：
A) it is inner in Compilation (appointing system target), Lyrtech is selected, selects SMQUAD-V4
B) in Part, the FPGA types on SignalMaster Quad Virtex-4 platforms are selected
C) in Target Directory, code, the path put of file of generation are specified
D) XST is selected Synthesis (specified synthesis tool) is inner
E) verilog is selected in Hardware Description Language
F) virtual value is inserted inside FPGA Clock Periods (ns) and Simulink Period
G) configuration for FPGA board configuration modules is as follows：
H) in Clock Type, Free Runing Hardware Clock are selected
I) hardware clock for selecting FPGA design to use in Clock Source
J) FPGA1 or FPGA2 is selected in SignalMaster FPGA ID
K) after having carried out these configuration steps, it is possible to the work such as continue to be compiled model.
3. compilation model
Generator is clicked on, starts to generate code and compiles bitstream.The code of generation saves as .bit forms.
So far, completed for the configurations of FPGA models and compiling work that have already turned on.Next can enter
The collecting work of row information.
4. storage playback
After the FPGA models of opening are configured and compiled, adopting for signal can be carried out using signal sampling channel
Collection.Step is as follows：VHS Control Utility are opened, in General Contrlo, VHS-ADC/DAC Selection
Select VHS-ADC.In Bitstream file for FPGA l, the specified file aac_cw.bit for needing to load.Click on
PROGRAM FPGA, wait until FPGA Programing ... .SUCCESS. occur in General Control, Clock
In Source lists, Fixed is selected, LOCKED occurs inside DCMs.Service data gathers, and selects RUN.In Data
In Record, the passage of data storage is selected.This experiment have selected 1,2 passages respectively, 3,4 passages, 1 passage, and 2 passages are tried
Test, frame sign is arranged to 8K, in SDRAM Trigger Source lists, selects Manual；In Save recorded
In data to raw binary file, specified file name and path；Afterwards, matlab midpoints impact Kaitian line is returned to.Afterwards
Click on Get Next Available Frame, log-on data record.After startup, the data recorded in SDRAM upload to main frame
Hold and save as a binary file, form .bin.So far, completed for the gatherer process of signal.Afterwards,
The spectrum analysis of signal is acquired using the M files write using Matlab, obtains the spectral characteristic of signal.
Claims (2)
1. a kind of software radio is recognizing passive radar system, it is characterized in that, structure includes：
Signal generator and radio-frequency antenna, for launching electromagnetic wave, simulate external sort algorithm signal；
The VHS-ADC multichannel analog-to-digital conversion boards of Lyrtech Software Radio platforms, carried out for external emitter Signals high
Speed collection；
DRC interface boards, for using transmitting to FPGA, DRC to be Lyrtech expansion module, DRC by the signal collected
Module can carry out the digital data transmission of high speed between support plate；
FPGA is as LTE Baseband Processing Unit, for developing simultaneously testing signal process algorithm；
Data treated FPGA carry out man-machine friendship by cpci bus and development environment MATLAB/Simulink/LSP/VC++
Mutually.
2. software radio as claimed in claim 1 is recognizing passive radar system, it is characterized in that, FPGA includes：
FPGA high-speed AD acquisition module, a certain external sort algorithm signal is sampled；
Spectrum analysis module, spectrum analysis is carried out to collection signal, obtains its related frequency domain information；
Bandpass filtering modules block, set the frequency of bandpass filter and amplitude to limit parameter according to the result of spectrum analysis, will obtain
Sampled signal carry out bandpass filtering；
Demodulation, decoding and related process module, for based on SECO, being demodulated, decoding to the signal after obtaining and phase
Pass is handled, and finally carries out frequency spectrum playback.
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| CN110007991A (en) * | 2019-02-19 | 2019-07-12 | 成都能通科技有限公司 | One kind being based on PXI platform software radio distributed synchronization collecting method |
| CN113992282A (en) * | 2021-10-26 | 2022-01-28 | 广东电网有限责任公司 | Wireless-like spectrum cognition check detection platform |
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Application publication date: 20180209 |