CN107015063A - 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
A kind of Wide band multi-channel Correlation receiver, including：Digital collection 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 connected with digital collection module, and orthogonal signalling are quantified for receiving, and obtains a multiple correlation result to quantifying orthogonal signalling progress multiple correlation computing；Synchronization control module, is connected to be controlled with data acquisition module and related process module, status signal and multiple correlation result for receiving digital collection module and related process module, and will be exported after the status signal of reception and the packing of multiple correlation result.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, so as to the bandwidth and center frequency point of observation baseband signal needed for flexibly choosing, while reducing the influence that external environment radio interference is brought.
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 technology
The observation of radio wavelength band is to study celestial body one of (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 radiant body.Different-waveband is penetrated
Electric wave reflects different characteristics and state, and its radiation frequency and ambient parameter are closely related.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 be provided from solar chromosphere into solar-terrestrial physics broad regions, relevant 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 is obtained, can be with
There is provided on 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.Because the radiation that solar burst activity primary power discharges space near area occurs mainly in centimetre~decimeter
Wave band.And in this region, centimetre~serious restriction explored the origin of sun aggravating activities by the missing of decimeter range imaging observation
And regularity of occurrence and development, and limit the research to solar activity and to anthropogenic influence and prediction ability.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 individual frequency：If the wild side mountain solar radio heliograph (Nobeyama Radio Heliograph, NoRH) of Japan is in 17GHz and 34GHz 2
Observed on frequency；5 between 150~450MHz of the French alizarin solar radio heliograph (Nancay Radio Heliograph, NRH) in south
Observed on frequency；Russian Irkutsk solar radio radiation telescope (Siberian Solar Radio Telescope,
SSRT) observed on 5.7GHz single frequency points.
NoRH and NRH be based on synthetic aperture principle interference imaging technology (SSRT currently according to aperture synthesis into
As technology carries out scrap build) radio imaging observation is carried out to the sun.In general, based on aperture synthesis be imaged solar radio heliograph by
Aerial array, simulation receiving unit and Correlation receiver composition.Wherein Correlation receiver plays in solar radio heliograph
Core roles：The intermediate-freuqncy signal that simulation receiving unit is exported is acquired, filter, pre-process, quantified and multiple correlation computing.
If Fig. 1 and 2 is the overall structure block diagram of NoRH Correlation receivers, digital collection quantized segment is corresponded to respectively
With multiple correlation part.But, above-mentioned prior art still has following technological deficiency：
1st, NoRH and NRH Correlation receiver is due to the limitation of technological architecture, it is impossible to accomplish that multi-frequency lane is flexible
Observation.Such as NoRH observing frequencies are only 17GHz and 34GHz, and NRH observing frequency is 5 in 150MHz~450MHz bandwidth
Individual frequency；
2nd, because NoRH and NRH is quantified before multiple correlation computing using 1bit, the sensitivity of correlation output is not high, full
It is only the 63.7% of no quantization associated sensitivity in the case of sufficient Nyquist sample rates.
The content 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 these goals, as one aspect of the present invention, the present invention provides a kind of Wide band multi-channel digital phase
Receiver is closed, including：
Digital collection module, for inputting the intermediate frequency analog wideband signal gathered from 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 for receiving the output of digital collection module, and to quantifying orthogonal signalling
Carry out multiple correlation computing and obtain a multiple correlation result；
Synchronization control module, status signal and multiple correlation knot for receiving digital collection module and related process module
Really, and will the status signal of reception and multiple correlation result packing after export.
Further, above-mentioned digital collection module has multiple intermediate frequency input channels, is seen for inputting to be imaged from radio
Survey the intermediate frequency analog wideband signal of multiple antennas of collection.
Further, above-mentioned multiphase filtering channelizing is completed by multiphase filter group and cascade half-band filter group, many
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 into a series of digital orthogonal baseband signals declined with 2 times of bandwidth.
Further, above-mentioned digital orthogonal baseband signal obtains quantifying orthogonal signalling after quantification treatment.
Further, the processing that above-mentioned intermediate frequency analog wideband signal is carried out also is included：Channel assignment is set, for basis
Observation needs, to the digital orthogonal baseband signal of some fixed-bandwidth of multichannel output.
Further, auto-correlation processing, digital collection mould are also included to the processing that above-mentioned intermediate frequency analog wideband signal is carried out
Block is carried out after multiphase filtering channelizing, Channel assignment setting and channel auto-correlation processing successively to intermediate frequency analog wideband signal, is obtained
To an autocorrelation signal；Synchronization control module is additionally operable to receive autocorrelation signal, and exports after autocorrelation signal is packed in the lump.
Further, it is above-mentioned to be quantified as 2-bit quantification treatments.
Further, when above-mentioned synchronization control module to data acquisition module and related process module by providing system
Clock, clock signal, control signal and systematic parameter, to realize the control to data acquisition module and related process module.
Further, said system parameter includes compensation of delay and phase compensation.
To achieve these goals, as another aspect of the present invention, the invention provides a kind of Wide band multi-channel number
Word correlation reception processing system, including above-mentioned Wide band multi-channel Correlation receiver, in addition to a memory module and an electricity
Source module, wherein：
Memory module, is connected with synchronization control module, for receive and store packing after digital collection module and correlation at
Manage the status signal and multiple correlation result of module；
Power module, for other module for power supply for whole Wide band multi-channel digital correlation receiving processing system.
Present invention also offers a kind of Wide band multi-channel digital correlation method of reseptance, by one include synchronization control module,
The Wide band multi-channel Correlation receiver of digital collection module and related process module is realized, is comprised the following steps：
Step 1, synchronization control module send to digital collection module and related process module and instructed, and start input from radio
The intermediate frequency analog wideband signal of imaging observation collection；
Step 2, digital collection module input intermediate frequency analog wideband signal, and multiphase filter is carried out to intermediate frequency analog wideband signal
Ripple channelizing processing and quantification treatment, obtain a quantization orthogonal signalling and an autocorrelation result；
Step 3, related process module, which are received, quantifies orthogonal signalling, and is obtained to quantifying orthogonal signalling progress multiple correlation computing
One multiple correlation result；
Step 4, synchronization control module receive the status signal and multiple correlation knot of digital collection module and related process module
Really, and will the status signal of reception and multiple correlation result packing after export.
Understood based on above-mentioned technical proposal, Wide band multi-channel Correlation receiver and method of reseptance tool proposed by the present invention
Have the advantages that：
(1) multi-frequency lane observation and signal transacting 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 observation base needed for flexibly choosing
The bandwidth and center frequency point of band signal, while reducing the influence that external environment radio interference is brought；
(2) before to digital orthogonal baseband signal multiple correlation computing, 2-bit quantizations are carried out, are quantified relative to 1-bit, 2-bit amounts
The associated sensitivity of change can be improved to 88.1% from 63.7%；
(3) by carrying out auto-correlation processing to digital orthogonal baseband signal, calculating and exporting baseband signal multiple correlation result
Meanwhile, the auto-correlation performance number of baseband signal, therefore Wide band multi-channel Correlation receiver proposed by the present invention can be obtained
Possesses the basic function of broadband radio spectrograph.
Brief description of the drawings
Fig. 1 is the digital collection quantized segment of Japanese Nobeyama solar radio heliographs Correlation receiver；
Fig. 2 is the multiple correlation process part of Japanese Nobeyama solar radio heliographs Correlation receiver；
Fig. 3 is the structural representation for the Wide band multi-channel Correlation receiver that one embodiment of the invention is proposed；
Fig. 4 is the installation drawing for the Ming Antu radio heliograph that one embodiment of the invention is proposed；
Fig. 5 is the signal processing flow figure for the Wide band multi-channel Correlation receiver that one embodiment of the invention is proposed；
Fig. 6 be one embodiment of the invention propose Wide band multi-channel Correlation receiver in, the plate of digital collection module
Card device figure；
Fig. 7 is the scheme of installation for the Wide band multi-channel Correlation receiver that one embodiment of the invention is proposed.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in further detail.
The bright peace of Wide band multi-channel Correlation receiver component being researched and developed by China national observatory including of the invention
Figure radio spectra solar radio heliograph (Mingantu Spectral Radioheliograph, hereinafter referred to as MUSER), first centimetre
Realized in~decimeter range (0.4GHz~15GHz) and solar burst is observed with high spatial, high time and high frequency resolution simultaneously
The kinetic property of activity, 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 important original in corona physical study
Journal of Sex Research achievement, China is detected with studying in solar activity, solar activity influence over the ground etc. the research in field enter it is international first
Enter ranks, and promote China radio physics, plasma physics, geophysics and space science and aviation,
The development of the ambits such as space flight.
The following is Ming Antu radio spectra solar radio heliograph and the performance comparison table of other solar radio heliographs：
Wide band multi-channel Correlation receiver in Ming Antu radio heliograph is its core component, its main work(
Can be to receive and gathering the wideband IF signal from all antenna modeling rear ends, and signal progress channelizing, 2-bit are quantified
With multiple correlation processing, output result is the multiple correlation output and auto-correlation output between different antennae in each base band.
Specifically, the Wide band multi-channel Correlation receiver disclosed by the invention being used in Ming Antu radio heliograph,
Including：
Digital collection module, for inputting the intermediate frequency analog wideband signal gathered from 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 for receiving the output of digital collection module, and to quantifying orthogonal signalling
Carry out multiple correlation computing and obtain a multiple correlation result；
Synchronization control module, status signal and multiple correlation knot for receiving digital collection module and related process module
Really, and will the status signal of reception and multiple correlation result packing after export.
Preferably, above-mentioned digital collection module has multiple intermediate frequency input channels, and radio imaging observation is come from for inputting
The intermediate frequency analog wideband signal of multiple antennas of collection.
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 into 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 quantifying orthogonal signalling after quantification treatment.
Preferably, the processing that above-mentioned intermediate frequency analog wideband signal is carried out also is included：Channel assignment is set, for according to sight
Surveying needs, to the digital orthogonal baseband signal of some fixed-bandwidth of multichannel output.Can be dry according to ambient radio during bandwidth selection
Disturb monitoring result and carry out output and subsequent quantizatiion relevant treatment come channel where selecting glitch-free center frequency point, so can be by
The influence of extraneous radio interference is minimized.
Preferably, auto-correlation processing, digital collection module are also included to the processing that above-mentioned intermediate frequency analog wideband signal is carried out
Intermediate frequency analog wideband signal is carried out successively after multiphase filtering channelizing, Channel assignment setting and channel auto-correlation processing, obtained
One autocorrelation signal；Synchronization control module is additionally operable to receive autocorrelation signal, and exports after autocorrelation signal is packed in the lump.
Preferably, it is above-mentioned to be quantified as 2-bit quantification treatments.
Above-mentioned synchronization control module is believed by providing system clock, sequential to data acquisition module and related process module
Number, control signal and systematic parameter, to realize the control to data acquisition module and related process module.
Preferably, said 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 digital phase of Wide band multi-channel
Close receiving processing system, including above-mentioned Wide band multi-channel Correlation receiver, in addition to a memory module and a power supply mould
Block, wherein：
Memory module, is connected with synchronization control module, for receive and store packing after digital collection module and correlation at
Manage the status signal and multiple correlation result of module；
Power module, for other module for power supply for whole 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,
The Wide band multi-channel Correlation receiver of digital collection module and related process module is realized, is comprised the following steps：
Step 1, synchronization control module send to digital collection module and related process module and instructed, and start input from radio
The intermediate frequency analog wideband signal of imaging observation collection；
Step 2, digital collection module input intermediate frequency analog wideband signal, and multiphase filter is carried out to intermediate frequency analog wideband signal
Ripple channelizing processing and quantification treatment, obtain a quantization orthogonal signalling and an autocorrelation result；
Step 3, related process module, which are received, quantifies orthogonal signalling, and is obtained to quantifying orthogonal signalling progress multiple correlation computing
One multiple correlation result；
Step 4, synchronization control module receive the status signal and multiple correlation knot of digital collection module and related process module
Really, and will the status signal of reception and multiple correlation result packing after export.
Wherein, it is used to realize that the device of input intermediate frequency analog wideband signal is higher than for sample rate in digital collection module
1Gsps, quantifies the EV10AQ190 of the analog-digital converter of bit wide >=8, such as production of E2V companies；Realize to intermediate frequency simulation broadband letter
The device for number carrying out multiphase filtering channelizing processing and quantification treatment function is the model of fpga chip, such as ALTERA companies
Stratix III EP3S260 fpga chip.
Wide band multi-channel Correlation receiver proposed by the present invention and method of reseptance are entered below by way of specific embodiment
Row is described in detail.
Embodiment
As shown in figure 3, the present embodiment proposes a kind of Wide band multi-channel Correlation receiver, including：
Digital collection module, for inputting the intermediate frequency analog wideband signal gathered from radio imaging observation, and to intermediate frequency
Analog wideband signal carries out multiphase filtering channelizing processing, Channel assignment and set and quantification treatment successively, obtains a quantization orthogonal
Signal；Intermediate frequency analog wideband signal is carried out successively at multiphase filtering channelizing processing, Channel assignment setting and channel auto-correlation
Reason, obtains an autocorrelation result；
Related process module, is connected with digital collection module, and orthogonal signalling are quantified for receiving, and to quantifying orthogonal signalling
Carry out multiple correlation computing and obtain a multiple correlation result；
Synchronization control module, is connected to be controlled with data acquisition module and related process module, for receiving numeral
The status signal and multiple correlation result and autocorrelation result of acquisition module and related process module, and by the status signal of reception,
Exported after multiple correlation result and autocorrelation result packing.
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, digital orthogonal baseband signal is obtained；Cascading half-band filter group is 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 is obtained after quantification treatment
Quantify orthogonal signalling.
Channel assignment is provided 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, including above-mentioned Wide band multi-channel Correlation receiver, in addition to a memory module and a power module,
Wherein：
Memory module, is connected with synchronization control module, for receive and store packing after digital collection 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 whole Wide band multi-channel digital correlation receiving processing system.
This is sentenced exemplified by 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
Receive and Wideband Intermediate Frequency of the collection from all antennas (antenna of MUSER-I arrays 40, the antenna of MUSER-H arrays 60) analog back-end is believed
Number (with a width of 400MHz), and carry out that channelizing, 2-bit quantify and multiple correlation is handled to signal, output result is different antennae
Between in each base band multiple correlation output and auto-correlation output.
It is each independent by Correlation receiver MDCR-I and MDCR-H inside MUSER-I and MUSER-H array systems
Realize above-mentioned functions.Because both system architectures are similar, MDCR-I technical scheme is only described here, Ming Antu radio heliograph
Device is constituted as shown in figure 4, specifically including：
Digital collection (DIG) module input intermediate frequency analog wideband signal (bandwidth 400MHz), the amount after output 2-bit quantizations
Change orthogonal signalling to related process module.DIG modules are made up of 6 pieces of boards, are labeled as DIG-1~DIG-6, wherein DIG-6
Standby board.Every piece of DIG board has 8 analog intermediate frequency input channels, each leads to reception channel with 1GSPS sample rates to from front end
The analog wideband signal (50MHz~450MHz) of No. 8 antennas carries out digital sample, and Bing Jiangmei roads analog wideband signal carries out 16 and led to
The orthogonal channelization in road, after the orthogonal signalling (I, Q) of base band are obtained, carries out 2-bit quantizations, after 2-bit is quantified to it
Digital orthogonal baseband signal is output to related process module.
Relevant treatment (COR) module, inputs the 2-bit from DIG modules and quantifies orthogonal signalling, carry out multiple correlation computing,
And multiple correlation operation result is exported to synchronization control module.COR module is made up of 4 pieces of boards, labeled as COR-1~COR-4.Often
Block COR boards receive the digital orthogonal baseband signal after the quantization of different DIG boards using 32 groups of signal wires, and (input data bandwidth is about
For 25.6Gbps), the quantization orthogonal signalling of base band identical to different antennae carry out multiple correlation computing, and multiple correlation result is passed through
4 groups of signal wires export (output data bandwidth is about 64Mbps).
Synchronization Control (SYN) module, the input/output for controlling DIG modules and COR module mainly has three functions：
1st, it is that DIG modules and COR module provide system clock and clock signal；2nd, believe to DIG modules and the control of COR module Transmission system
Number and systematic parameter (such as compensation of delay and phase compensation)；3rd, the multiple correlation result from COR module is received, from DIG modules
Autocorrelation result, the status information data of DIG modules and COR module, be sent to storage mould using its package as final output
Block.
DIG modules, COR module and SYN modules provide data exchange channels and realized by data communication (COM) module.COM
Module is designed as 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 backplanes, the socket designs of 8 pieces of DIG boards are unified pair
Deng；The socket designs of 4 pieces of COR boards are unified equities.Can be with interchange of data slot between reciprocity board.
In Fig. 4 label 1.~signal description 6. is as follows：
1., antenna to DIG modules analog signal, with a width of 400MHz；
2., SYN module boards snap into the clock and timing control signal of DIG modules board and COR module board；
3., the 2bit of DIG modules board output quantifies orthogonal signalling, is used as the input of COR module board；
4., SYN module boards snap into the BDB Bi-directional Data Bus of DIG modules board and COR module board, transmission control instruction and
The status information of return；
5., the correlation results data of COR module board output, is used as the data input of SYN module boards；
6., SYN modules board carries out the data that data packet is exported to multiple correlation result data and other systems information
Frame, data storage cell is transferred to 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 is proposed, main description
Processing to the broadband signal from individual antenna：High-speed AD converter (ADC, sample rate is 1Gsps) is right first
The broadband signal (50~450MHz) of 400MHz bandwidth is sampled, and the data signal after sampling is entered after delay adjustment
In multiphase filter group PFFB, PFFB carries out channelizing to the data signal of 400MHz bandwidth, obtains a width of 25MHz of initial strip,
Midbandwidth equally distributed 16 road digital orthogonal baseband signal I, Q in 50~450MHz.Pass through phase compensation per roadbed band signal
All export a series of with 2 times of bands to the baseband signal of every road 25MHz bandwidth by cascade half-band filter group CHBF, CHBF again afterwards
The digital orthogonal baseband signal that width declines：12.5MHz、6.25MHz、3.125MHz、1.5625MHz.The orthogonal basis of these different bandwidths
Band signal is again by channel width selector (Channel Bandwidth Selector, CBS), and CBS will be according to actual observation
Need, all channels are exported with the baseband signal (being defaulted as 25MHz) of some fixed-bandwidth, afterwards quantizer (Two-bit
Quantizer, TQ) 2-bit quantizations, the 2-bit digital orthogonal baseband signals of output are carried out to the baseband signals 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 outputs 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 common as key data, and other specification
Same package (Data Packager：DP) it is transferred to memory cell for output data frame.
Therefore, the digital signal processing algorithm overwhelming majority of related data needed for MDCR carries out solar radio radiation imaging all exists
Realized in DIG modules, including the multiphase filtering channelizing (PFFB) of broadband signal, Channel assignment set (CHBF＆CBS), 2-bit
Quantify (TQ) and channel auto-correlation (CAC), COR module is mainly accomplished that the digital orthogonal baseband signal after quantifying to 2-bit is carried out
Multiple correlation computing (CMAC).
Wherein, all there is every piece of board of DIG modules identical structure and component to constitute.High-speed figure gathers mould
The EV10AQ190 that the function of block is produced by E2V companies is realized.Monolithic EV10AQ190 includes 4 passages, single channel sampling rate
Up to 1.25Gsps, a width of 10bits of quantization；Delay adjustment and phase compensation function, PFFB, CHBF, CBS, Quantizer
With function programming realization in the high-performance FPGA-Stratix III EP3S260 that ALTERA companies produce such as CAC.
Specifically, front end analogue broadband signal (50MHz~450MHz) is after high-speed figure collection and by PFFB
It is changed into the 16 a width of 25MHz of road band digital quadrature baseband signal；Further per roadbed band signal by being taken out after CHBF according to difference
Head, the broadband signal with a width of 12.5MHz, 6.25MHz, 3.125MHz and 1.5625MHz can be obtained respectively.With 1.5625MHz
Broadband signal exemplified by, 256 center frequency points are had in 400MHz bandwidth.Can be according to ambient radio in bandwidth selection
Interference monitoring result carries out output and subsequent quantizatiion relevant treatment come channel where selecting glitch-free center frequency point, so can be with
The influence of extraneous radio interference is minimized.
As shown in fig. 6, be the circuit board layout diagram of the digital analog input card of DIG modules in the present embodiment, can from Fig. 6
Go out, include two panels ATMEL e2v10aq190 high-speed figures acquisition chips and two panels ALTERA per block number word analog input card
StratixIII E260 programmable logic chips.Wherein every ATMEL completes the digital collection of 4 tunnel analog wideband signals；
ALTERA StratixIII are realized to the channelizing of data signal, bandwidth selection and the orthogonal quantification treatments of 2-bit.Monoblock is gathered
Card, which is realized, to be handled the digital collection of 8 tunnel analog wideband signals and channelizing.
Fig. 7 is the Wide band multi-channel Correlation receiver that the present embodiment is proposed, the installation in 19 inches of racks is integrated
Schematic diagram, as shown in the figure：Correlation receiver is located above rack, including DIG modules, SYN modules and COR module
All boards are connected in communication mainboard by VPX slots, in 14U cabinet.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 installing space.Digital units are stored
Server and storage array are located at middle part (size 3U) and bottom (the size 16U) of 19 inches of racks, are connect by optical fiber and numeral
Receive processing unit module connection.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright, it should be understood that the foregoing is only the present invention specific embodiment, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc. should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of Wide band multi-channel Correlation receiver, it is characterised in that including：
Digital collection module, for inputting the intermediate frequency analog wideband signal gathered from 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, the quantization orthogonal signalling for receiving the digital collection module output, and it is orthogonal to the quantization
Signal carries out multiple correlation computing and obtains a multiple correlation result；
Synchronization control module, status signal and the multiple correlation for receiving the digital collection module and related process module
As a result, and will the status signal of reception and multiple correlation result packing after export.
2. Wide band multi-channel Correlation receiver as claimed in claim 1, it is characterised in that the digital collection module tool
There are multiple intermediate frequency input channels, the intermediate frequency analog wideband signal for inputting the multiple antennas gathered from radio imaging observation.
3. Wide band multi-channel Correlation receiver as claimed in claim 1, it is characterised in that the multiphase filtering channelizing
Completed by multiphase filter group and cascade half-band filter group, multiphase filter group is used for the intermediate frequency analog wideband signal
Channelizing is carried out, digital orthogonal baseband signal is obtained；The cascade half-band filter group is used to digital orthogonal baseband signal being converted to one
Arrange the digital orthogonal baseband signal declined with 2 times of bandwidth.
4. Wide band multi-channel Correlation receiver as claimed in claim 3, it is characterised in that the digital orthogonal baseband signal warp
Cross and the quantization orthogonal signalling are obtained after the quantification treatment.
5. Wide band multi-channel Correlation receiver as claimed in claim 3, it is characterised in that broadband is simulated to the intermediate frequency
The processing that signal is carried out also includes：Channel assignment is set, for according to observation needs, to the multichannel output fixed-bandwidth
Digital orthogonal baseband signal.
6. Wide band multi-channel Correlation receiver as claimed in claim 5, it is characterised in that broadband is simulated to the intermediate frequency
The processing that signal is carried out also includes auto-correlation processing, and the digital collection module is carried out successively to the intermediate frequency analog wideband signal
After multiphase filtering channelizing, Channel assignment setting and channel auto-correlation processing, an autocorrelation signal is obtained；The Synchronization Control mould
Block is additionally operable to receive the autocorrelation signal, and exports after the autocorrelation signal is packed in the lump.
7. Wide band multi-channel Correlation receiver as claimed in claim 1, it is characterised in that described to be quantified as 2-bit amounts
Change is handled.
8. Wide band multi-channel Correlation receiver as claimed in claim 1, it is characterised in that the synchronization control module is led to
Cross to the data acquisition module and related process module and system clock, clock signal, control signal and systematic parameter are provided, it is right
The control of the data acquisition module and related process module；The systematic parameter includes compensation of delay and phase compensation parameter.
9. a kind of Wide band multi-channel digital correlation receiving processing system, it is characterised in that including any in such as claim 1~8
Wide band multi-channel Correlation receiver described in, in addition to a memory module and a power module, wherein：
Memory module, is connected with the synchronization control module, for receiving and storing the digital collection module and phase after packing
Close the status signal and multiple correlation result of processing module；
Power module, for other module for power supply for whole Wide band multi-channel digital correlation receiving processing system.
10. a kind of Wide band multi-channel digital correlation method of reseptance, comprises the following steps：
Step 1, synchronization control module send to digital collection module and related process module and instructed, and start input from radio imaging
Observe the intermediate frequency analog wideband signal of collection；
Step 2, digital collection module input the intermediate frequency analog wideband signal, and the intermediate frequency analog wideband signal are carried out many
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 computing 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 digital collection module and related process module
Result is closed, and will be exported after the status signal of reception and the packing of multiple correlation result.
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