CN107015063B - Wide band multi-channel Correlation receiver and method of reseptance - Google Patents
Wide band multi-channel Correlation receiver and method of reseptance Download PDFInfo
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
A kind of Wide band multi-channel Correlation receiver, comprising: data acquisition module carries out multiphase filtering channelizing processing and quantification treatment for inputting intermediate frequency analog wideband signal, and to intermediate frequency analog wideband signal, obtains a quantization orthogonal signalling；Related process module is connect with data acquisition module, for receiving quantization orthogonal signalling, and is carried out multiple correlation operation to quantization orthogonal signalling and is obtained a multiple correlation result；Synchronization control module is connect with data acquisition module and related process module to be controlled, and the status signal and multiple correlation of acquisition module and related process module after received status signal and the packing of multiple correlation result as a result, and will export for receiving data.The present invention is by using multiphase filter group and cascade half-band filter group, multiphase filtering channelizing processing is carried out to intermediate frequency analog wideband signal, it is influenced brought by external environment radio interference so as to flexibly choose the bandwidth and center frequency point of required observation baseband signal, while reducing.
Description
Technical field
The present invention relates to radio observation technical field, relate more specifically to a kind of Wide band multi-channel Correlation receiver and
Method of reseptance.
Background technique
The observation of radio wavelength band is to study one of celestial body (including the sun, the earth, planet and extrasolar celestial body) very
Important means, referred to as radio observation.Because radio radiation reflects the important characteristic and state of radiator.Different-waveband is penetrated
Electric wave reflects different characteristic and state, and radiation frequency is closely related with environmental parameter.Thus penetrated according in a certain frequency
The observational study of electric radiation can release the physical messages such as electron density or the magnetic field of source region.
In Solar Physics field, radio observation can provide from solar chromosphere into solar-terrestrial physics broad regions, is related etc.
The information such as gas ions and high energy particle dynamic behavior, this is not available for other means.Therefore, radio observation is to study too
The positive most important detection means of aggravating activities.The various spectral fine structures that multiband broader frequency spectrum radio observation obtains, can be with
It provides about the side such as sun Coronal Magnetic Field, energy releasing mechanism, the generation of high energy particle and propagation and corresponding radiation mechanism
The abundant information in face.Since the radiation in space near solar burst activity primary power release area occurs mainly in centimetre~decimeter
Wave band.And in this region, centimetre~missing of decimeter range imaging observation serious will restrict the origin for exploring sun aggravating activities
And regularity of occurrence and development, and limit the research and prediction ability to solar activity and to anthropogenic influence.Therefore, develop centimetre
The radio broadband solar radio heliograph of~decimeter range just seems increasingly important.
Up to the present, solar radio radiation imaging observation focuses primarily upon the frequency spectrum Flow Observation of high time resolution and several
On a frequency point: if the wild side mountain solar radio heliograph (Nobeyama Radio Heliograph, NoRH) of Japan is in 17GHz and 34GHz 2
It is observed on frequency point；5 between 150~450MHz of the French alizarin solar radio heliograph (Nancay Radio Heliograph, NRH) in south
It is observed on frequency point；Russian Irkutsk solar radio radiation telescope (Siberian Solar Radio Telescope,
SSRT it) is observed on 5.7GHz single frequency point.
NoRH and NRH be based on synthetic aperture principle interference imaging technology (SSRT currently according to aperture synthesis at
As technology carries out scrap build) radio imaging observation is carried out to the sun.In general, based on aperture synthesis imaging solar radio heliograph by
Aerial array, simulation receiving unit and Correlation receiver composition.Wherein Correlation receiver plays in solar radio heliograph
Core roles: being acquired the intermediate-freuqncy signal of simulation receiving unit output, filter, pre-processing, quantifying and multiple correlation operation.
If Fig. 1 and 2 is the overall structure block diagram of NoRH Correlation receiver, data acquisition-quantization unit is respectively corresponded
Divide and multiple correlation part.But the above-mentioned prior art still has following technological deficiency:
1, the Correlation receiver of NoRH and NRH can not accomplish that multi-frequency lane is flexible due to the limitation of technological architecture
Observation.If NoRH observing frequency is only 17GHz and 34GHz, the observing frequency of NRH is 5 in 150MHz~450MHz bandwidth
A frequency point；
2, quantified before multiple correlation operation using 1bit due to NoRH and NRH, the sensitivity of correlation output is not high, full
It is only the 63.7% of no quantization associated sensitivity in the case where sufficient Nyquist sample rate.
Summary of the invention
Based on problem above, it is an object of the invention to propose a kind of Wide band multi-channel Correlation receiver and recipient
Method, for solving at least one of above-mentioned technical problem.
To achieve the goals above, as one aspect of the present invention, the present invention provides a kind of Wide band multi-channel number phase
Close receiver, comprising:
Data acquisition module, for inputting the intermediate frequency analog wideband signal from the acquisition of radio imaging observation, and to intermediate frequency
Analog wideband signal carries out multiphase filtering channelizing processing and quantification treatment, obtains a quantization orthogonal signalling；
Related process module, the quantization orthogonal signalling that acquisition module exports for receiving data, and to quantization orthogonal signalling
It carries out multiple correlation operation and obtains a multiple correlation result；
Synchronization control module, for receiving data status signal and multiple correlation knot of acquisition module and related process module
Fruit, and exported after received status signal and multiple correlation result are packaged.
Further, above-mentioned data acquisition module has multiple intermediate frequency input channels, sees for inputting from radio imaging
Survey the intermediate frequency analog wideband signal of the mutiple antennas of acquisition.
Further, above-mentioned multiphase filtering channelizing is completed by multiphase filter group and cascade half-band filter group, more
Phase filter group is used to intermediate frequency analog wideband signal carrying out channelizing, obtains digital orthogonal baseband signal；Cascade half-band filter group
For digital orthogonal baseband signal to be converted to a series of digital orthogonal baseband signals declined with 2 times of bandwidth.
Further, above-mentioned digital orthogonal baseband signal obtains quantization orthogonal signalling after quantification treatment.
Further, the processing above-mentioned intermediate frequency analog wideband signal carried out further include: channel selection setting is used for basis
Observation needs, to the digital orthogonal baseband signal of some fixed-bandwidth of multichannel output.
Further, the processing carried out to above-mentioned intermediate frequency analog wideband signal further includes auto-correlation processing, data acquisition module
After block successively carries out multiphase filtering channelizing, channel selection setting and channel auto-correlation processing to intermediate frequency analog wideband signal, obtain
To an autocorrelation signal；Synchronization control module is also used to receive autocorrelation signal, and exports after autocorrelation signal is packaged together.
Further, above-mentioned to be quantified as 2-bit quantification treatment.
Further, when above-mentioned synchronization control module is by providing system to data acquisition module and related process module
Clock, clock signal, control signal and system parameter, to realize the control to data acquisition module and related process module.
Further, above system parameter includes compensation of delay and phase compensation.
To achieve the goals above, as another aspect of the present invention, the present invention provides a kind of Wide band multi-channel numbers
Word correlation reception processing system further includes a memory module and an electricity including above-mentioned Wide band multi-channel Correlation receiver
Source module, in which:
Memory module is connect with synchronization control module, for receive and store be packaged after data acquisition module and correlation at
Manage the status signal and multiple correlation result of module；
Power module, for other module for power supply for entire Wide band multi-channel digital correlation receiving processing system.
The present invention also provides a kind of Wide band multi-channel digital correlation method of reseptance, by one include synchronization control module,
Data acquisition module and the Wide band multi-channel Correlation receiver of related process module are realized, comprising the following steps:
Step 1, synchronization control module send instruction to data acquisition module and related process module, start input from radio
The intermediate frequency analog wideband signal of imaging observation acquisition；
Step 2, data acquisition module input intermediate frequency analog wideband signal, and carry out multiphase filter to intermediate frequency analog wideband signal
Wave channelizing processing and quantification treatment obtain a quantization orthogonal signalling and an autocorrelation result；
Step 3, related process module receive quantization orthogonal signalling, and carry out multiple correlation operation to quantization orthogonal signalling and obtain
One multiple correlation result；
Step 4, synchronization control module receive the status signal and multiple correlation knot of data acquisition module and related process module
Fruit, and exported after received status signal and multiple correlation result are packaged.
Based on the above-mentioned technical proposal it is found that Wide band multi-channel Correlation receiver proposed by the present invention and method of reseptance tool
It has the advantages that:
(1) multi-frequency lane observation and signal processing be can be realized in observation time, by using multiphase filter group
(Polyphase&FFT Filter Bank, PFFB) and cascade half-band filter group (Cascade Half Band Filter-
Bank:CHBF), multiphase filtering channelizing processing is carried out to intermediate frequency analog wideband signal, so as to flexibly choose required observation base
The bandwidth and center frequency point of band signal, while reducing influence brought by external environment radio interference；
(2) before to digital orthogonal baseband signal multiple correlation operation, 2-bit quantization is carried out, is quantified relative to 1-bit, 2-bit amount
The associated sensitivity of change can be improved from 63.7% to 88.1%；
(3) by carrying out auto-correlation processing to digital orthogonal baseband signal, calculating and exporting baseband signal multiple correlation result
Meanwhile it can get the auto-correlation performance number of baseband signal, therefore Wide band multi-channel Correlation receiver proposed by the present invention
The basic function for having broadband radio spectrograph.
Detailed description of the invention
Fig. 1 is data acquisition-quantized segment of Japanese Nobeyama solar radio heliograph Correlation receiver；
Fig. 2 is the multiple correlation processing part of Japanese Nobeyama solar radio heliograph Correlation receiver；
Fig. 3 is the structural schematic diagram for the Wide band multi-channel Correlation receiver that one embodiment of the invention proposes；
Fig. 4 is the device figure for the Ming Antu radio heliograph that one embodiment of the invention proposes；
Fig. 5 is the signal processing flow figure for the Wide band multi-channel Correlation receiver that one embodiment of the invention proposes；
Fig. 6 is the plate of data acquisition module in the Wide band multi-channel Correlation receiver that one embodiment of the invention proposes
Card device figure；
Fig. 7 is the scheme of installation for the Wide band multi-channel Correlation receiver that one embodiment of the invention proposes.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in further detail.
Bright peace being researched and developed by China national observatory, including Wide band multi-channel Correlation receiver component of the invention
Figure radio spectra solar radio heliograph (Mingantu Spectral Radioheliograph, hereinafter referred to as MUSER), for the first time centimetre
It is realized in~decimeter range (0.4GHz~15GHz) and solar burst is observed with high spatial, high time and high frequency resolution simultaneously
Movable kinetic property detects the origin of sun aggravating activities.It is dynamic in the solar radio radiation broadband with international most advanced level
On the basis of the domestic existing instrument and equipment such as state frequency spectrograph and video magnetoheliograph, fill up at present in the world to solar flare energy
Initial release distinguishes the blank of VHF band high-resolution radio imaging observation, makes every effort to obtain in corona physical study important original
Journal of Sex Research achievement, make China solar activity detect with study, solar activity influence over the ground etc. fields research enter it is international first
Arranged, and push China radio physics, plasma physics, geophysics and space science and aviation,
The development of the ambits such as space flight.
It is the performance comparison table of Ming Antu radio spectra solar radio heliograph Yu other solar radio heliographs below:
Wide band multi-channel Correlation receiver in Ming Antu radio heliograph is its core component, main function
It can be to receive and acquiring the wideband IF signal from all antenna modeling rear ends, and signal progress channelizing, 2-bit are quantified
With multiple correlation processing, multiple correlation output and auto-correlation output of the result between different antennae in each base band are exported.
Specifically, the Wide band multi-channel Correlation receiver disclosed by the invention in Ming Antu radio heliograph,
Include:
Data acquisition module, for inputting the intermediate frequency analog wideband signal from the acquisition of radio imaging observation, and to intermediate frequency
Analog wideband signal carries out multiphase filtering channelizing processing and quantification treatment, obtains a quantization orthogonal signalling；
Related process module, the quantization orthogonal signalling that acquisition module exports for receiving data, and to quantization orthogonal signalling
It carries out multiple correlation operation and obtains a multiple correlation result；
Synchronization control module, for receiving data status signal and multiple correlation knot of acquisition module and related process module
Fruit, and exported after received status signal and multiple correlation result are packaged.
Preferably, above-mentioned data acquisition module has multiple intermediate frequency input channels, comes from radio imaging observation for inputting
The intermediate frequency analog wideband signal of the mutiple antennas of acquisition.
Above-mentioned multiphase filtering channelizing is completed by multiphase filter group and cascade half-band filter group, multiphase filter group
For intermediate frequency analog wideband signal to be carried out channelizing, digital orthogonal baseband signal is obtained；Cascade half-band filter group is used for will be orthogonal
Baseband signal is converted to a series of digital orthogonal baseband signals declined with 2 times of bandwidth.
Above-mentioned digital orthogonal baseband signal obtains quantization orthogonal signalling after quantification treatment.
Preferably, the processing above-mentioned intermediate frequency analog wideband signal carried out further include: channel selection setting, for according to sight
It surveys and needs, to the digital orthogonal baseband signal of some fixed-bandwidth of multichannel output.It can be dry according to ambient radio when bandwidth selection
Monitoring result is disturbed to select channel where glitch-free center frequency point to carry out output and subsequent quantizatiion relevant treatment, can be incited somebody to action in this way
The influence of extraneous radio interference minimizes.
Preferably, the processing carried out to above-mentioned intermediate frequency analog wideband signal further includes auto-correlation processing, data acquisition module
After successively carrying out multiphase filtering channelizing, channel selection setting and channel auto-correlation processing to intermediate frequency analog wideband signal, obtain
One autocorrelation signal；Synchronization control module is also used to receive autocorrelation signal, and exports after autocorrelation signal is packaged together.
Preferably, above-mentioned to be quantified as 2-bit quantification treatment.
Above-mentioned synchronization control module is by providing system clock, timing letter to data acquisition module and related process module
Number, control signal and system parameter, to realize the control to data acquisition module and related process module.
Preferably, above system parameter includes compensation of delay and phase compensation.
Based on above-mentioned Wide band multi-channel Correlation receiver, the invention also discloses a kind of Wide band multi-channel number phases
It further includes a memory module and a power supply mould that receiving processing system, which is closed, including above-mentioned Wide band multi-channel Correlation receiver
Block, in which:
Memory module is connect with synchronization control module, for receive and store be packaged after data acquisition module and correlation at
Manage the status signal and multiple correlation result of module；
Power module, for other module for power supply for entire Wide band multi-channel digital correlation receiving processing system.
The invention also discloses a kind of Wide band multi-channel digital correlation method of reseptance, by one include synchronization control module,
Data acquisition module and the Wide band multi-channel Correlation receiver of related process module are realized, comprising the following steps:
Step 1, synchronization control module send instruction to data acquisition module and related process module, start input from radio
The intermediate frequency analog wideband signal of imaging observation acquisition；
Step 2, data acquisition module input intermediate frequency analog wideband signal, and carry out multiphase filter to intermediate frequency analog wideband signal
Wave channelizing processing and quantification treatment obtain a quantization orthogonal signalling and an autocorrelation result；
Step 3, related process module receive quantization orthogonal signalling, and carry out multiple correlation operation to quantization orthogonal signalling and obtain
One multiple correlation result；
Step 4, synchronization control module receive the status signal and multiple correlation knot of data acquisition module and related process module
Fruit, and exported after received status signal and multiple correlation result are packaged.
Wherein, it is higher than in data acquisition module for realizing the device of input intermediate frequency analog wideband signal for sample rate
1Gsps quantifies the analog-digital converter of bit wide >=8, the EV10AQ190 produced such as E2V company；It realizes to intermediate frequency simulation broadband letter
Number carrying out the device of multiphase filtering channelizing processing and quantification treatment function is fpga chip, such as the model of ALTERA company
The fpga chip of Stratix III EP3S260.
Below by way of specific embodiment to Wide band multi-channel Correlation receiver proposed by the present invention and method of reseptance into
Row detailed description.
Embodiment
As shown in figure 3, the present embodiment proposes a kind of Wide band multi-channel Correlation receiver, comprising:
Data acquisition module, for inputting the intermediate frequency analog wideband signal from the acquisition of radio imaging observation, and to intermediate frequency
Analog wideband signal successively carries out multiphase filtering channelizing processing, channel selection setting and quantification treatment, and it is orthogonal to obtain a quantization
Signal；Intermediate frequency analog wideband signal is successively carried out at multiphase filtering channelizing processing, channel selection setting and channel auto-correlation
Reason, obtains an autocorrelation result；
Related process module is connect with data acquisition module, for receiving quantization orthogonal signalling, and to quantization orthogonal signalling
It carries out multiple correlation operation and obtains a multiple correlation result；
Synchronization control module is connect with data acquisition module and related process module to be controlled, for receiving data
The status signal and multiple correlation result and autocorrelation result of acquisition module and related process module, and by received status signal,
Multiple correlation result and autocorrelation result export after being packaged.
Multiphase filtering channelizing is completed by multiphase filter group and cascade half-band filter group, and multiphase filter group is used for
Intermediate frequency analog wideband signal is subjected to channelizing, obtains digital orthogonal baseband signal；Half-band filter group is cascaded to be used for quadrature base band
Signal is converted to a series of digital orthogonal baseband signals declined with 2 times of bandwidth；The digital orthogonal baseband signal obtains after quantification treatment
Quantify orthogonal signalling.
Channel selection setting for according to observation needs, to the digital orthogonal baseband signal of some fixed-bandwidth of multichannel output.
Based on above-mentioned Wide band multi-channel Correlation receiver, the present embodiment also proposes a kind of Wide band multi-channel digital correlation
Receiving processing system further includes a memory module and a power module including above-mentioned Wide band multi-channel Correlation receiver,
Wherein:
Memory module is connect with synchronization control module, for receive and store be packaged after data acquisition module and correlation at
Manage status signal, multiple correlation result and the autocorrelation result of module；
Power module, for other module for power supply for entire Wide band multi-channel digital correlation receiving processing system.
For this sentences Ming Antu radio heliograph, to the Wide band multi-channel Correlation receiver of the present embodiment and broadband
Multi-channel digital correlation reception processing system is specifically described, and the major function of Wide band multi-channel Correlation receiver is to connect
It receives and acquisition is believed from the Wideband Intermediate Frequency of all antennas (40 antenna of MUSER-I array, 60 antenna of MUSER-H array) analog back-end
Number (bandwidth 400MHz), and channelizing, 2-bit quantization and multiple correlation are carried out to signal and handled, output result is different antennae
Between in each base band multiple correlation output and auto-correlation output.
It is respectively independent by Correlation receiver MDCR-I and MDCR-H inside MUSER-I and MUSER-H array system
Realize above-mentioned function.Because the two system architecture is similar, the technical solution of MDCR-I is only described here, Ming Antu radio heliograph
Device forms as shown in figure 4, specifically including:
Data acquire (DIG) module input intermediate frequency analog wideband signal (bandwidth 400MHz), the amount after output 2-bit quantization
Change orthogonal signalling to related process module.DIG module is made of 6 pieces of boards, is labeled as DIG-1~DIG-6, and wherein DIG-6 is
Spare board.Every piece of DIG board has 8 analog intermediate frequency input channels, and each logical reception channel is with 1GSPS sample rate to from front end
The analog wideband signal (50MHz~450MHz) of No. 8 antennas carries out digital sample, and it is logical that the road Bing Jiangmei analog wideband signal carries out 16
The orthogonal channelization in road carries out 2-bit quantization to it, after 2-bit is quantified after the orthogonal signalling (I, Q) for obtaining base band
Digital orthogonal baseband signal is output to related process module.
Relevant treatment (COR) module inputs the 2-bit from DIG module and quantifies orthogonal signalling, carries out multiple correlation operation,
And multiple correlation operation result is exported to synchronization control module.COR module is made of 4 pieces of boards, is labeled as COR-1~COR-4.Often
Block COR board uses 32 groups of signal wires to receive the digital orthogonal baseband signal after the quantization of different DIG boards, and (input data bandwidth is about
For 25.6Gbps), multiple correlation operation is carried out to the quantization orthogonal signalling of the identical base band of different antennae, and multiple correlation result is passed through
4 groups of signal wires export (output data bandwidth is about 64Mbps).
Synchronously control (SYN) module, for controlling the input/output of DIG module and COR module, main there are three functions:
1, system clock and clock signal are provided for DIG module and COR module；2, to DIG module and COR module Transmission system control letter
Number and system parameter (such as compensation of delay and phase compensation)；3, it receives the multiple correlation result from COR module, come from DIG module
Autocorrelation result, DIG module and COR module status information data, be sent to storage mould for its package as final output
Block.
DIG module, COR module and SYN module provide data exchange channels and are realized by data communication (COM) module.COM
Module design is the backboard with 13 data slots, and major function is for 8 pieces of DIG boards, 4 pieces of COR boards and 1 block of SYN plate
Data communication between card provides high-speed data channel.On COM module backplane, the slot design of 8 pieces of DIG boards is unified pair
Deng；The slot design of 4 pieces of COR boards is unified equity.Data slot can be interchanged between reciprocity board.
In Fig. 4 label 1.~signal description 6. is as follows:
1., the analog signal of antenna to DIG module, bandwidth 400MHz；
2., SYN module board snap into the clock and timing control signal of DIG module board and COR module board；
3., DIG module board output 2bit quantify orthogonal signalling, the input as COR module board；
4., SYN module board snap into the BDB Bi-directional Data Bus of DIG module board and COR module board, transmission control instruction and
The status information of return；
5., COR module board output correlation results data, as SYN module board data input；
6., SYN module board the data that data packet is exported are carried out to multiple correlation result data and other systems information
Frame is transferred to data storage cell by high speed data bus.
Fig. 5 is the signal processing flow figure for the Wide band multi-channel Correlation receiver that the present embodiment proposes, main to describe
Processing to the broadband signal from individual antenna: first high-speed AD converter (ADC, sample rate 1Gsps) is right
The broadband signal (50~450MHz) of 400MHz bandwidth is sampled, and the digital signal after sampling enters after delay adjustment
In multiphase filter group PFFB, PFFB carries out channelizing to the digital signal of 400MHz bandwidth, and obtaining initial bandwidth is 25MHz,
Midbandwidth equally distributed 16 road digital orthogonal baseband signal I, Q in 50~450MHz.Every roadbed band signal passes through phase compensation
The baseband signal of every road 25MHz bandwidth is all exported using cascade half-band filter group CHBF, CHBF afterwards a series of with 2 times of bands
The digital orthogonal baseband signal of width decline: 12.5MHz, 6.25MHz, 3.125MHz, 1.5625MHz.The orthogonal basis of these different bandwidths
Band signal passes through channel width selector (Channel Bandwidth Selector, CBS) again, and CBS will be according to actual observation
It needs, all channels is exported with the baseband signal (being defaulted as 25MHz) of some fixed-bandwidth, later quantizer (Two-bit
Quantizer, TQ) 2-bit quantization, the 2-bit digital orthogonal baseband signal of output are carried out to the baseband signal of 16 channel fixed-bandwidths
Into complex correlator (Complex Multiplier-Accumulator, CMAC), CMAC calculates the identical base band letter of different antennae
Multiple correlation result between road.In addition, the digital orthogonal baseband signal of CBS output is simultaneously also into channel autocorrelator (Channel
Auto-Correlator, CAC), CAC calculates auto-correlation (power) result of each baseband channel.The identical base of final different antennae
The autocorrelation result of multiple correlation result with channel and all baseband channels of each antenna is total as key data and other parameters
Same package (Data Packager:DP) is that output data frame is transferred to storage unit.
Therefore, the digital signal processing algorithm overwhelming majority that MDCR carries out related data needed for solar radio radiation is imaged all exists
It is realized in DIG module, (CHBF&CBS), 2-bit is arranged in multiphase filtering channelizing (PFFB), channel selection including broadband signal
Quantify (TQ) and channel auto-correlation (CAC), COR module, which is mainly accomplished that, carries out the digital orthogonal baseband signal after 2-bit quantization
Multiple correlation operation (CMAC).
Wherein, every piece of board of DIG module all has identical structure and component composition.High Speed Analog/number
The function of conversion module is realized by the EV10AQ190 that E2V company produces.Monolithic EV10AQ190 includes 4 channels, and single channel is adopted
For sample rate up to 1.25Gsps, quantization bit wide is 10bits；Delay adjustment and phase compensation function, PFFB, CHBF, CBS,
The programming in high-performance FPGA-Stratix III EP3S260 that ALTERA company produces of the functions such as Quantizer and CAC is real
It is existing.
Specifically, front end analogue broadband signal (50MHz~450MHz) is after high-speed data acquisition and by PFFB
Become the digital quadrature baseband signal that 16 tunnel bandwidth are 25MHz；Further every roadbed band signal by after CHBF according to different pumpings
Head can obtain the broadband signal that bandwidth is 12.5MHz, 6.25MHz, 3.125MHz and 1.5625MHz respectively.With 1.5625MHz
Broadband signal for, 256 center frequency points are shared in 400MHz bandwidth.It can be according to ambient radio in bandwidth selection
Interference monitoring result selects the channel where glitch-free center frequency point to carry out output and subsequent quantizatiion relevant treatment, in this way can be with
The influence of extraneous radio interference is minimized.
As shown in fig. 6, be the circuit board layout diagram of DIG module data collection board in the present embodiment, it can from Fig. 6
Out, every piece of data collecting plate card includes two panels ATMEL e2v10aq190 High Speed Analog/number conversion chip and two panels ALTERA
StratixIII E260 programmable logic chip.Wherein every ATMEL completes the data acquisition of 4 tunnel analog wideband signals；
ALTERA StratixIII is realized to the channelizing of digital signal, bandwidth selection and the orthogonal quantification treatment of 2-bit.Monolith acquisition
Card, which is realized, handles the data acquisition and channelizing of 8 tunnel analog wideband signals.
Fig. 7 is the Wide band multi-channel Correlation receiver that the present embodiment proposes, the installation in 19 inches of cabinets is integrated
Schematic diagram, as shown in the figure: Correlation receiver is located above cabinet, including DIG module, SYN module and COR module
All boards are connected in communication mainboard by VPX slot, are mounted in the cabinet of 14U.It is empty at the top of digital received processing unit
Between install four fan disks to radiate, for increase radiating efficiency, bottom reserves fan disk installation space.Digital units storage
Server and storage array are located at the middle part (size 3U) and lower part (size 16U) of 19 inches of cabinets, are connect by optical fiber and number
Receive processing unit module connection.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in protection of the invention
Within the scope of.
Claims (9)
1. a kind of Wide band multi-channel Correlation receiver characterized by comprising
Data acquisition module, for inputting the intermediate frequency analog wideband signal from the acquisition of radio imaging observation, and to the intermediate frequency
Analog wideband signal carries out multiphase filtering channelizing processing and quantification treatment, obtains a quantization orthogonal signalling；
Related process module, for receiving the quantization orthogonal signalling of the data acquisition module output, and it is orthogonal to the quantization
Signal carries out multiple correlation operation and obtains a multiple correlation result；
Synchronization control module, for receive the data acquisition module and related process module status signal and the multiple correlation
As a result, and will received status signal and multiple correlation result be packaged after export,
Wherein, the multiphase filtering channelizing is completed by multiphase filter group and cascade half-band filter group, multiphase filter
The intermediate frequency analog wideband signal is carried out channelizing by group, obtains multiple digital orthogonal baseband signals, the cascade half-band filter group
For digital orthogonal baseband signal to be converted to a series of digital orthogonal baseband signals declined with 2 times of bandwidth, comprising:
Digital signal after sampling enters in multiphase filter group after delay adjustment, and multiphase filter group is to digital signal
Channelizing is carried out, multichannel digital orthogonal baseband signal is obtained；Every roadbed band signal is directly entered half band filter of cascade after phase compensation
Wave device group, cascade half-band filter group are filtered every roadbed band signal and export a series of quadrature base bands declined with 2 times of bandwidth
Signal.
2. Wide band multi-channel Correlation receiver as described in claim 1, which is characterized in that the data acquisition module tool
There are multiple intermediate frequency input channels, for inputting the intermediate frequency analog wideband signal of the mutiple antennas from the acquisition of radio imaging observation.
3. Wide band multi-channel Correlation receiver as described in claim 1, which is characterized in that the digital orthogonal baseband signal warp
The quantization orthogonal signalling are obtained after crossing the quantification treatment.
4. Wide band multi-channel Correlation receiver as described in claim 1, which is characterized in that simulate broadband to the intermediate frequency
The processing that signal carries out further include: channel selection setting is used for according to observation needs, to the multichannel output fixed-bandwidth
Digital orthogonal baseband signal.
5. Wide band multi-channel Correlation receiver as claimed in claim 4, which is characterized in that simulate broadband to the intermediate frequency
The processing that signal carries out further includes auto-correlation processing, and the data acquisition module successively carries out the intermediate frequency analog wideband signal
After multiphase filtering channelizing, channel selection setting and channel auto-correlation processing, an autocorrelation signal is obtained；The synchronously control mould
Block is also used to receive the autocorrelation signal, and exports after the autocorrelation signal is packaged together.
6. Wide band multi-channel Correlation receiver as described in claim 1, which is characterized in that described to be quantified as 2-bit amount
Change processing.
7. Wide band multi-channel Correlation receiver as described in claim 1, which is characterized in that the synchronization control module is logical
It crosses to the data acquisition module and related process module and system clock, clock signal, control signal and system parameter is provided, it is right
The control of the data acquisition module and related process module；The system parameter includes compensation of delay and phase compensation parameter.
8. a kind of Wide band multi-channel digital correlation receiving processing system, which is characterized in that including any in such as claim 1~7
Wide band multi-channel Correlation receiver described in, further includes a memory module and a power module, in which:
Memory module is connect with the synchronization control module, for receive and store be packaged after the data acquisition module and phase
Close the status signal and multiple correlation result of processing module；
Power module, for other module for power supply for entire Wide band multi-channel digital correlation receiving processing system.
9. a kind of Wide band multi-channel digital correlation method of reseptance, comprising the following steps:
Step 1, synchronization control module send instruction to data acquisition module and related process module, start input and are imaged from radio
Observe the intermediate frequency analog wideband signal of acquisition；
Step 2, data acquisition module input the intermediate frequency analog wideband signal, and carry out to the intermediate frequency analog wideband signal more
The processing of phase filtering channel and quantification treatment obtain a quantization orthogonal signalling and an autocorrelation result；
Step 3, related process module receive the quantization orthogonal signalling, and carry out multiple correlation operation to the quantization orthogonal signalling
Obtain a multiple correlation result；
Step 4, synchronization control module receive the status signal and the complex phase of the data acquisition module and related process module
It closes as a result, and will be exported after received status signal and the packing of multiple correlation result.
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| CN111308224B (en) * | 2020-02-24 | 2021-02-05 | 山东大学 | Signal flatness compensation method of radio astronomical receiver and radio astronomical receiver |
| CN111487476B (en) * | 2020-05-06 | 2022-07-08 | 深圳市鼎阳科技股份有限公司 | Quasi-peak detection method and quasi-peak detector |
| CN113438043A (en) * | 2021-05-21 | 2021-09-24 | 西安电子科技大学 | Broadband spectrum monitoring system and method based on FPGA |
| CN113438012B (en) * | 2021-06-25 | 2022-09-09 | 中国电子科技集团公司第五十四研究所 | Multi-channel satellite communication device based on VPX framework |
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