CN105842663B - A kind of BAQ compression methods and device, SAR data shaper - Google Patents
A kind of BAQ compression methods and device, SAR data shaper Download PDFInfo
- Publication number
- CN105842663B CN105842663B CN201610339174.XA CN201610339174A CN105842663B CN 105842663 B CN105842663 B CN 105842663B CN 201610339174 A CN201610339174 A CN 201610339174A CN 105842663 B CN105842663 B CN 105842663B
- Authority
- CN
- China
- Prior art keywords
- data
- block
- sub
- baq
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000007906 compression Methods 0.000 title claims abstract description 17
- 230000006835 compression Effects 0.000 title claims abstract description 17
- 241001269238 Data Species 0.000 claims abstract description 26
- 239000003638 chemical reducing agent Substances 0.000 claims description 40
- 238000013139 quantization Methods 0.000 claims description 20
- 230000001186 cumulative effect Effects 0.000 claims description 14
- 230000003044 adaptive effect Effects 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000012856 packing Methods 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 5
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 2
- 238000004088 simulation Methods 0.000 claims description 2
- 230000010287 polarization Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 14
- 238000004590 computer program Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000005388 cross polarization Methods 0.000 description 2
- 238000013144 data compression Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- VMXUWOKSQNHOCA-UKTHLTGXSA-N ranitidine Chemical compound [O-][N+](=O)\C=C(/NC)NCCSCC1=CC=C(CN(C)C)O1 VMXUWOKSQNHOCA-UKTHLTGXSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
Classifications
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
- G01S13/904—SAR modes
- G01S13/9076—Polarimetric features in SAR
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/024—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using polarisation effects
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
The embodiment of the invention discloses a kind of BAQ compression methods and device, SAR data shapers, wherein the method includes：Determine pending data；The data are subjected to uniform piecemeal, data block set is obtained, one piece or more of data block is included at least in the data block set；Each data block is subjected to piecemeal according to row, obtains the first sub-block to T sub-blocks, the T is the natural number more than 1；The first sub-block block to T sub-blocks is encoded, correspondence obtains first coding data to T coded datas respectively；The first coding data is exported respectively to the T coded datas.
Description
Technical field
The present invention relates to synthetic aperture radar (Synthetic Aperture Radar, SAR) field of signal processing, especially
It is related to a kind of BAQ compression methods and device, SAR data shaper.
Background technology
Synthetic aperture radar is a kind of round-the-clock, round-the-clock high-resolution microwave imaging radar, is widely used in flood
The civilian and national defence such as disaster monitoring, the mineral products forest reserves and crops generaI investigation, mapping, military investigation, marine pollution monitoring
Field.
With being constantly progressive for SAR technologies, either carried SAR system or Spaceborne SAR System are all towards multiband, more
Polarization, high-resolution direction are developed.Multipolarization SAR passes through the different polarity electromagnetics of transmitting/reception for single polarization SAR
Signal can obtain more target informations and Terrain Scattering characteristic.Theoretically use bis- (polarization) channel emissions, four (polarization)
Channel reception can obtain perfact polarization information simultaneously, two of which parallel launch channel distinguish emission level (Horizontal,
H), vertical (Vertical, V) polarized pulse signal, four parallel receiving channels receive tetra- kinds of polarization letters of HH, HV, VH, VV respectively
Number.In view of reducing the complexity of system cost of implementation and equipment, spaceborne multipolarization SAR system is generally handed over by single transmission channel
Fork emits two kinds of polarization pulses (H polarizes and V polarization), and double reception channel (H polarization receptions channel and V polarization receptions channel) is realized
It is accurate to obtain four polarization informations simultaneously.Fig. 1 is that single channel emits the accurate transmitting for obtaining four polarization informations simultaneously of dual channel receiver realization
Record principle figure, Fig. 2 is H polarization reception channel reception data array figures, as shown in Fig. 2, the reception data are pressed in orientation
HH, VH, HH, VH interlacing cross arrangement.
In above-mentioned multipolarization SAR system, in the cross polarization echo that SAR is received not co polar signal amplitude have it is aobvious
Difference is write, traditional BAQ coding methods do not consider cross polarization not co polar signal amplitude difference, simply use compressed data
N frame data average statistical will necessarily cause encoding error excessive current data compressed encoding before frame.
Invention content
To solve existing technical problem, a kind of BAQ compression methods of offer of the embodiment of the present invention and device, SAR numbers
According to shaper, encoding error existing in the prior art can be reduced.
In order to achieve the above objectives, the technical solution of the embodiment of the present invention is realized in：
In a first aspect, a kind of Block Adaptive Quantization BAQ compression methods, the method includes：
Determine pending data；
The data are subjected to uniform piecemeal, obtain data block set, included at least in the data block set one piece with
On data block；
Each data block is subjected to piecemeal according to row, obtains the first sub-block to T sub-blocks, the T is
Natural number more than 1；
The first sub-block block to T sub-blocks is encoded, correspondence obtains first coding data extremely respectively
T coded datas；
The first coding data is exported respectively to the T coded datas.
Second aspect, a kind of Block Adaptive Quantization BAQ compressor reducers, the BAQ compressor reducers include：
First determination unit, for determining pending data；
First blocking unit obtains data block set, the data block set for the data to be carried out uniform piecemeal
In include at least one piece or more of data block；
Second blocking unit obtains the first sub-block to T for each data block to be carried out piecemeal according to row
Sub-block, the T are the natural number more than 1；
First coding unit, for being encoded to the first sub-block block to T sub-blocks, respectively to deserved
To first coding data to T coded datas；
First output unit, for exporting the first coding data respectively to the T coded datas.
The third aspect, a kind of data shaper of synthetic aperture radar SAR system, the data shaper include simulation/
Digital A/D converter, quadrature demodulator, filter and Block Adaptive Quantization BAQ compressor reducers, wherein：
The A/D converter, the analog signal for receiving SAR are converted to digital signal, and are sent to orthogonal solution
Adjust device；
The quadrature demodulator, for by the digital signal Orthogonal Decomposition received be the roads I in the same direction signal data and
The orthogonal roads Q signal data, and the roads I signal data and the roads Q signal data are sent to filter；
The filter, for the roads the I signal data received and the roads Q signal data to be filtered, and
Output signal is sent to BAQ compressor reducers；
The BAQ compressor reducers, for determining that pending data, the pending data are to be exported from the filter
The roads I signal data and the roads Q signal data；The data are subjected to uniform piecemeal, obtain data block set, the set of data blocks
One piece or more of data block is included at least in conjunction；Each data block is subjected to piecemeal according to row, obtains the first sub-block
To T sub-blocks, the T is the natural number more than 1；The first sub-block block to T sub-blocks are encoded, point
First coding data Dui Ying not obtained to T coded datas；The first coding data is exported respectively to the T coded numbers
According to.
A kind of BAQ compression methods of offer of the embodiment of the present invention and device, SAR data shaper, wherein：It determines pending
Data；The data are subjected to uniform piecemeal, data block set is obtained, one piece or more is included at least in the data block set
Data block；Each data block is subjected to piecemeal according to row, obtains the first sub-block to T sub-blocks, the T is big
In 1 natural number；The first sub-block block to T sub-blocks is encoded, correspondence obtains the first coded number respectively
According to T coded datas；The first coding data is exported respectively to the T coded datas.So, it is possible, which reduces coding, misses
Rate.
Description of the drawings
Fig. 1 is that single channel emits the accurate transmitting record principle figure for obtaining four polarization informations simultaneously of dual channel receiver realization；
Fig. 2 is H polarization reception channel reception data array figures；
Fig. 3 is one SAR data BAQ compression method implementation process schematic diagrames of the embodiment of the present invention；
Fig. 4 is two SAR data BAQ compression method implementation process schematic diagrames of the embodiment of the present invention；
Fig. 5 is three SAR data BAQ compression method implementation process schematic diagrames of the embodiment of the present invention；
Fig. 6 is the BAQ Method And Principle flow charts of four alternant polarization absolute coding of the embodiment of the present invention；
Fig. 7 is the composed structure schematic diagram of five BAQ compressor reducers of the embodiment of the present invention；
Fig. 8 is the composed structure schematic diagram of the data shaper of six SAR system of the embodiment of the present invention.
Specific implementation mode
The technical solution of the present invention is further elaborated in the following with reference to the drawings and specific embodiments.
Embodiment one
In order to solve technical problem present in background technology, the embodiment of the present invention provides a kind of compression sides SAR data BAQ
Method, be applied to SAR system data shaper, the data shaper include analog/digital A/D converter, quadrature demodulator,
Filter and Block Adaptive Quantization BAQ compressor reducers, Fig. 3 are that one SAR data BAQ compression method implementation processes of the embodiment of the present invention are shown
It is intended to, as shown in figure 3, the method includes：
Step S301, the BAQ compressor reducers determine pending data；
Here, the pending data include if signal sampling data, radiofrequency signal sampled data or synthetic aperture
The orthogonal data of quadrature demodulation, filtering output in radar SAR system.
The data are carried out uniform piecemeal, obtain data block set, the data by step S302, the BAQ compressor reducers
One piece or more of data block is included at least in set of blocks；
Here, the data are uniformly blocked into the data block that size is 2M × N, obtain data block set.Wherein, 2M is small
Echo pulse signal number is received in SAR system, N is less than the sampling number that echo pulse signal is received in the SAR system.
The concrete numerical value of M and N can basis be observed atural object in aforementioned range or the feature of echo-signal is flexibly arranged.
Each data block is carried out piecemeal according to row, obtains the first sub-block by step S303, the BAQ compressor reducers
To T sub-blocks, the T is the natural number more than 1；
Here, the step S303 includes：The data block is subjected to piecemeal according to each row data changing rule, obtains the
One sub-block is to T sub-blocks；
Further, described that the data block is subjected to piecemeal according to each row data changing rule, obtain the first subdata
Block to T sub-blocks, including：Each data block is subjected to piecemeal by (Tk-T+1) row to (Tk) row, to deserved
To the first sub-block to T sub-blocks, it is the natural number more than 1, the data block that wherein k, which takes the natural number more than 1, T,
Include Tk rows altogether.
Wherein, each row data changing rule includes the rule that data data parity line amplitude in the block alternately changes
Rule.In spaceborne multipolarization SAR system, the data data in the block are alternately changed by line amplitude, therefore in the star
It carries in multipolarization SAR system, it is described that the data block is subjected to piecemeal according to each row data changing rule, obtain the first subdata
Block to T sub-blocks, including：It will be each described according to the rule that data data parity line amplitude in the block alternately changes
Data block carries out piecemeal according to parity rows, obtains the first sub-block and the second sub-block.
Step S304, the BAQ compressor reducers encode the first sub-block block to T sub-blocks, respectively
Correspondence obtains first coding data to T coded datas；
Here, the data block is to carry out piecemeal, therefore the first obtained subnumber according to the changing rule of each row data
Data variation according to block block to T sub-blocks be it is slow, then to the first sub-block block to T sub-blocks into
Row absolute coding, reduces encoding error.
Step S305, the BAQ compressor reducers export the first coding data to the T coded datas respectively.
In the embodiment of the present invention, pending data are determined；The data are subjected to uniform piecemeal, obtain set of data blocks
It closes, one piece or more of data block is included at least in the data block set；Each data block is subjected to piecemeal according to row, is obtained
To the first sub-block to T sub-blocks, the T is the natural number more than 1；To the first sub-block block to T
Data block is encoded, and correspondence obtains first coding data to T coded datas respectively；The first coding data is exported respectively
To the T coded datas；It so, it is possible the error of reduction compressed encoding.
Embodiment two
In order to solve technical problem present in background technology, the embodiment of the present invention provides a kind of compression sides SAR data BAQ
Method, be applied to SAR system data shaper, the data shaper include analog/digital A/D converter, quadrature demodulator,
Filter and Block Adaptive Quantization BAQ compressor reducers, Fig. 4 are that two SAR data BAQ compression method implementation processes of the embodiment of the present invention are shown
It is intended to, as shown in figure 4, the method includes：
Step S401, the A/D converter receive the echo-signal exported from receiver；
The analog signal that SAR is received is converted to digital signal by step S402, the A/D converter；
The digital signal is sent to the quadrature demodulator by step S403, the A/D converter；
The digital signal Orthogonal Decomposition is the roads I in the same direction signal data and orthogonal Q by step S404, the quadrature demodulator
Road signal data；
The roads I signal data and the roads Q signal data are sent to the filter by step S405, the quadrature demodulator
Wave device；
The roads I signal data and the roads Q signal data are filtered by step S406, the filter；
Step S407, the filter will be filtered after the roads I signal data and the roads Q signal data send
To the BAQ compressor reducers；
Step S408, the BAQ compressor reducers determine pending data；
Here, the pending data are the roads the I signal data exported from the filter and the roads Q signal data.
The data are carried out uniform piecemeal, obtain data block set, the data by step S409, the BAQ compressor reducers
One piece or more of data block is included at least in set of blocks；
Here, the data are uniformly blocked into the data block that size is 2M × N, obtain data block set.Wherein, 2M is small
Echo pulse signal number is received in SAR system, N is less than the sampling number that echo pulse signal is received in the SAR system.
The concrete numerical value of M and N can basis be observed atural object in aforementioned range or the feature of echo-signal is flexibly arranged.
Each data block is carried out piecemeal according to row, obtains the first sub-block by step S410, the BAQ compressor reducers
To T sub-blocks, the T is the natural number more than 1；
Here, each data block is subjected to piecemeal by (Tk-T+1) row to (Tk) row, it is corresponding to obtain the first son
Data block is to T sub-blocks, and it is the natural number more than 1 that wherein k, which takes the natural number more than 1, T, and the data block includes altogether
Tk rows.In spaceborne multipolarization SAR system, the data data in the block are alternately changed by line amplitude, therefore described
In spaceborne multipolarization SAR system, each data block is subjected to piecemeal according to parity rows, obtains the first sub-block and second
Sub-block.
Step S411, the BAQ compressor reducers encode the first sub-block block to T sub-blocks, respectively
Correspondence obtains first coding data to T coded datas；
Here, the data block is to carry out piecemeal, therefore the first obtained subnumber according to the changing rule of each row data
Data variation according to block block to T sub-blocks be it is slow, then to the first sub-block block to T sub-blocks into
Row absolute coding, reduces encoding error.
Step S412, the BAQ compressor reducers export the first coding data to the T coded datas respectively.
In the embodiment of the present invention, pending data are determined；The data are subjected to uniform piecemeal, obtain set of data blocks
It closes, one piece or more of data block is included at least in the data block set；Each data block is subjected to piecemeal according to row, is obtained
To the first sub-block to T sub-blocks, the T is the natural number more than 1；To the first sub-block block to T
Data block is encoded, and correspondence obtains first coding data to T coded datas respectively；The first coding data is exported respectively
To the T coded datas；It so, it is possible the error of reduction compressed encoding.
Embodiment three
The embodiment of the present invention provides a kind of SAR data compression method, is applied to the data shaper of SAR system, the number
Include that analog/digital A/D converter, quadrature demodulator, filter and Block Adaptive Quantization BAQ compressor reducers, Fig. 5 are according to shaper
Three SAR data BAQ compression method implementation process schematic diagrames of the embodiment of the present invention, as shown in figure 5, the method includes：
The data of first sub-block are carried out cumulative summation by step S501, the BAQ compressor reducers, obtain first it is cumulative and
Data；
Step S502, the BAQ compressor reducers are cumulative to described first and data generate the first mean values for 7 from high position interception
Code；
Step S503, adjacent son of the BAQ compressor reducers according to the first mean value code and with first sub-block
The absolute values of the data of data block generates first and tables look-up address；
Step S504, the BAQ compressor reducers are tabled look-up address according to described first, inquire the BAQ quantization encodings being generated in advance
Table obtains first and tables look-up value；
Here, the BAQ quantization encodings table be according to the parsing relationship and variance of mean value and variance and decision level and
The linear relationship of quantization level obtains the mapping relations for the table look-up address and coding schedule quantization level that sample output valve is formed, by
What MATLAB was generated in advance.
Step S505, the BAQ compressor reducers are tabled look-up the symbol of value and the data of the adjacent sub-block according to described first
Number position generates the first compressed encodings of BAQ；
Step S506, the BAQ compressor reducers carry out bit splicing and packing to first compressed encoding, obtain the first volume
Code data.
Example IV
The embodiment of the present invention first provides a kind of spaceborne multipolarization SAR data compression method, is applied to the data shape of SAR system
It grows up to be a useful person, the data shaper includes analog/digital A/D converter, quadrature demodulator, filter and Block Adaptive Quantization BAQ
Compressor reducer, the method are the not co polar signal absolute codings to alternately input, adapt to multipolarization system transposition polarized signal
The BAQ of input compresses.
Fig. 6 is the BAQ Method And Principle flow charts of three alternant polarization absolute coding of the embodiment of the present invention, and particular content is as follows：
To distinguish alternant polarization data, X is used2m-1And X2mOdd-numbered frame and even frame input data are indicated respectively, they distinguish
Corresponding two different polar echo data, wherein X2m-1={ x2m-1,1,x2m-1,2,x2m-1,3,...,x2m-1,n, X2m=
{x2m,1,x2m,2,x2m,3,...,x2m,n, m, n are natural number.Arbitrary size 2M × N may be used in BAQ compression methods of the present invention
Piecemeal, i.e. piecemeal distance are N to length, and orientation length is 2M.Assuming that distance is to K blocks are divided into, then it, can after inputting 2M frame data
To obtain 2K block number evidences, wherein odd-numbered frame includes K blocks, and even frame includes K blocks, odd-numbered frame 1, odd-numbered frame 2 to odd-numbered frame k, even number
Frame 1, even frame 2 to even frame k cumulative and following formula is respectively adopted to calculate：
…
…
The BAQ compressor reducers are using the cumulative of every block number evidence and from a high position 7 bits of interception (bits) as the phase in orientation
The mean value code of adjacent next block number evidence；Adjacent next block number on inputting orientation according to when, according to the mean value code of the generation and
The absolute value of current data generates address of tabling look-up；Then the BAQ quantization encoding tables that address lookup of tabling look-up according to is generated in advance,
Obtain value of tabling look-up；Again by the sign bit generation BAQ compress coding datas of table look-up value and the current data；By the compressed encoding
Data afterwards require to carry out splicing packing according to output data digit；Export the coded data after the splicing is packaged.Wherein, number
It requires to be controlled by computer input parameter with compressed encoding output data digit according to piecemeal size.
Embodiment five
Based on embodiment above-mentioned, the embodiment of the present invention provides a kind of Block Adaptive Quantization BAQ compressor reducers, and Fig. 7 is this hair
The composed structure schematic diagram of five BAQ compressor reducers of bright embodiment, as shown in fig. 7, the BAQ compressor reducers 700 include：First determines list
First 701, first blocking unit 702, the second blocking unit 703, the first coding unit 704 and the first output unit 705, wherein：
First determination unit 701, for determining pending data；
First blocking unit 702 obtains data block set, the data block for the data to be carried out uniform piecemeal
One piece or more of data block is included at least in set；
Second blocking unit 703 obtains the first sub-block extremely for each data block to be carried out piecemeal according to row
T sub-blocks, the T are the natural number more than 1；
First coding unit 704, it is right respectively for being encoded to the first sub-block block to T sub-blocks
First coding data should be obtained to T coded datas；
Here, first coding unit further comprises：
First summation unit, for the data of first sub-block to be carried out cumulative summation, obtain first it is cumulative and
Data；
First generation unit, for generating the first mean value codes for 7 from high position interception to the described first cumulative and data；
Second generation unit, for the adjacent sub-block according to the first mean value code and with first sub-block
The absolute values of data generate first and table look-up address；
Third generation unit is inquired the BAQ quantization encoding tables being generated in advance, is obtained for tabling look-up address according to described first
It tables look-up value to first；
4th generation unit, the sign bit life for table look-up according to described first value and the data of the adjacent sub-block
At the first compressed encodings of BAQ；
First concatenation unit obtains the first coded number for carrying out bit splicing and packing to first compressed encoding
According to.
First output unit 705, for exporting the first coding data respectively to the T coded datas.
Embodiment six
Based on embodiment above-mentioned, the embodiment of the present invention provides a kind of data shaper of SAR system, and Fig. 8 is the present invention
The composed structure schematic diagram of the data shaper of six SAR system of embodiment, as shown in figure 8, the data shaper 800 includes：
Analog/digital A/D converter 801, quadrature demodulator 802, filter 803 and Block Adaptive Quantization BAQ compressor reducers 804, wherein：
The A/D converter 801, the analog signal for receiving SAR are converted to digital signal, and by the number
Signal is sent to quadrature demodulator；
The quadrature demodulator 802, for being the roads I in the same direction signal data by the digital signal Orthogonal Decomposition received
With the orthogonal roads Q signal data, and the roads I signal data and the roads Q signal data are sent to filter；
The filter 803, for the roads the I signal data received and the roads Q signal data to be filtered,
And output signal is sent to BAQ compressor reducers；
The BAQ compressor reducers 804, for determining that pending data, the pending data are from the filter
The roads the I signal data and the roads Q signal data of output；The data are subjected to uniform piecemeal, obtain data block set, the data
One piece or more of data block is included at least in set of blocks；Each data block is subjected to piecemeal according to row, obtains the first subnumber
According to block to T sub-blocks, the T is the natural number more than 1；The first sub-block block to T sub-blocks are compiled
Code, it is corresponding respectively to obtain first coding data to T coded datas；The first coding data is exported respectively to be compiled to the T
Code data.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention
Formula.Moreover, the present invention can be used can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (8)
1. a kind of Block Adaptive Quantization BAQ compression methods, which is characterized in that the method includes：
Determine pending data；
The data are subjected to uniform piecemeal, data block set is obtained, one piece or more is included at least in the data block set
Data block；
(T (j-1)+i) row in each data block is divided into the i-th sub-block, correspondence obtains the first sub-block extremely
T sub-blocks, wherein j=1,2 ..., k, i=1,2 ..., T, i are the natural number not less than 1, and k is the nature not less than 1
Number, T are the natural number more than 1, and it includes Tk rows that the data block, which has altogether,；
The first sub-block block to T sub-blocks is encoded, the corresponding first coding data that obtains is to T volumes respectively
Code data；
The first coding data is exported respectively to the T coded datas.
2. according to the method described in claim 1, which is characterized in that the pending data include if signal sampling number
According to the orthogonal data of quadrature demodulation, filtering output in, radiofrequency signal sampled data or synthetic aperture radar SAR system.
3. according to the method described in claim 1, which is characterized in that it is described that the data are subjected to uniform piecemeal, it is counted
According to set of blocks, including：
The data are uniformly blocked into the data block that size is 2M × N, obtain data block set；Wherein, 2M is less than SAR system
Middle reception echo pulse signal number, N are less than the sampling number that echo pulse signal is received in the SAR system.
4. according to the method described in claim 1, which is characterized in that described to advise the data block according to each row data variation
Rule carries out piecemeal, obtains the first sub-block to T sub-blocks, including：
The rule alternately changed according to data data parity line amplitude in the block is by each data block according to parity rows
Piecemeal is carried out, the first sub-block and the second sub-block are obtained.
5. method as claimed in any of claims 1 to 4, which is characterized in that the first sub-block is encoded,
First coding data is obtained, including：
The data of first sub-block are subjected to cumulative summation, obtain the first cumulative and data；
And data cumulative to described first generate the first mean value codes for 7 from high position interception；
The is generated according to the first mean value code and with the absolute values of the data of the adjacent sub-block of first sub-block
One tables look-up address；
It tables look-up address according to described first, inquires the BAQ quantization encoding tables being generated in advance, obtain first and table look-up value；
Sign bit generation the first compressed encodings of BAQ for value and the data of the adjacent sub-block of tabling look-up according to described first；
Bit splicing and packing are carried out to first compressed encoding, obtain first coding data.
6. a kind of Block Adaptive Quantization BAQ compressor reducers, which is characterized in that the BAQ compressor reducers include：
First determination unit, for determining pending data；
First blocking unit obtains data block set for the data to be carried out uniform piecemeal, in the data block set extremely
Include one piece or more of data block less；
Second blocking unit obtains the first sub-block to T subnumbers for each data block to be carried out piecemeal according to row
According to block, the T is the natural number more than 1, wherein second blocking unit is further used for the data block according to each row
Data variation rule carries out piecemeal, obtains the first sub-block to T sub-blocks；By (T (j- in each data block
1)+i) row is divided into the i-th sub-block, and correspondence obtains the first sub-block to T sub-blocks, wherein j=1,2 ..., k, i
=1,2 ..., T, i are the natural number not less than 1, and k is the natural number not less than 1, and T is the natural number more than 1, the data block
Include Tk rows altogether；
First coding unit, it is corresponding respectively to obtain for being encoded to the first sub-block block to T sub-blocks
One coded data is to T coded datas；
First output unit, for exporting the first coding data respectively to the T coded datas.
7. according to the BAQ compressor reducers described in claim 6, which is characterized in that first coding unit, including：
First summation unit obtains the first cumulative and data for the data of first sub-block to be carried out cumulative summation；
First generation unit, for generating the first mean value codes for 7 from high position interception to the described first cumulative and data；
Second generation unit, for the number according to the first mean value code and with the adjacent sub-block of first sub-block
According to absolute value generate first and table look-up address；
Third generation unit inquires the BAQ quantization encoding tables being generated in advance, obtains for tabling look-up address according to described first
One tables look-up value；
4th generation unit, the sign bit generation for table look-up according to described first value and the data of the adjacent sub-block
The first compressed encodings of BAQ；
First concatenation unit obtains first coding data for carrying out bit splicing and packing to first compressed encoding.
8. a kind of data shaper of synthetic aperture radar SAR system, which is characterized in that the data shaper include simulation/
Digital A/D converter, quadrature demodulator, filter and Block Adaptive Quantization BAQ compressor reducers, wherein：
The A/D converter, the analog signal for receiving SAR is converted to digital signal, and the digital signal is sent out
Give quadrature demodulator；
The quadrature demodulator, for being the roads I in the same direction signal data and orthogonal Q by the digital signal Orthogonal Decomposition received
Road signal data, and the roads I signal data and the roads Q signal data are sent to filter；
The filter, for the roads the I signal data received and the roads Q signal data to be filtered, and will be defeated
Go out signal and is sent to BAQ compressor reducers；
The BAQ compressor reducers, for determining that pending data, the pending data are the I exported from the filter
Road signal data and the roads Q signal data；The data are subjected to uniform piecemeal, obtain data block set, the data block set
In include at least one piece or more of data block；(T (j-1)+i) row in each data block is divided into the i-th sub-block,
It corresponds to and obtains the first sub-block to T sub-blocks, wherein j=1,2 ..., k, i=1,2 ..., T, i are oneself not less than 1
So number, k are the natural number not less than 1, and T is the natural number more than 1, and it includes Tk rows that the data block, which has altogether,；First subnumber
It is encoded according to block block to T sub-blocks, correspondence obtains first coding data to T coded datas respectively；Institute is exported respectively
First coding data is stated to the T coded datas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339174.XA CN105842663B (en) | 2016-05-19 | 2016-05-19 | A kind of BAQ compression methods and device, SAR data shaper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339174.XA CN105842663B (en) | 2016-05-19 | 2016-05-19 | A kind of BAQ compression methods and device, SAR data shaper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105842663A CN105842663A (en) | 2016-08-10 |
| CN105842663B true CN105842663B (en) | 2018-09-11 |
Family
ID=56593033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610339174.XA Active CN105842663B (en) | 2016-05-19 | 2016-05-19 | A kind of BAQ compression methods and device, SAR data shaper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105842663B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646302B (en) * | 2018-03-23 | 2019-07-16 | 西安电子科技大学 | A kind of SAR data compression method for underground structure detection |
| CN113644915B (en) * | 2021-07-01 | 2022-06-07 | 中国科学院空天信息创新研究院 | Data compression method, data compression device and electronic equipment |
| CN113595557B (en) * | 2021-09-30 | 2021-12-28 | 阿里云计算有限公司 | Data processing method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070001896A1 (en) * | 2003-04-25 | 2007-01-04 | Hans Hellsten | Rfi suppression in sar |
| CN101165510A (en) * | 2006-10-18 | 2008-04-23 | 中国科学院电子学研究所 | Spaceborne synthetic aperture radar variable digit BAQ compression system and method |
-
2016
- 2016-05-19 CN CN201610339174.XA patent/CN105842663B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070001896A1 (en) * | 2003-04-25 | 2007-01-04 | Hans Hellsten | Rfi suppression in sar |
| CN101165510A (en) * | 2006-10-18 | 2008-04-23 | 中国科学院电子学研究所 | Spaceborne synthetic aperture radar variable digit BAQ compression system and method |
Non-Patent Citations (2)
| Title |
|---|
| Block adaptive quantization of magellan SAR data;Ronald Kwok 和 William T.K. Johnson;《IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING》;19890731;第27卷(第4期);全文 * |
| 直接射频采样的 L 波段星载 SAR 数字接收机设计;黄杰文 等;《中国科学院研究生院学报》;20100731;第27卷(第4期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105842663A (en) | 2016-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR910001469B1 (en) | Block encording apparatus | |
| CN105842663B (en) | A kind of BAQ compression methods and device, SAR data shaper | |
| ElBeltagy et al. | Image Encryption Through Rössler System, PRNG S-Box and Recamán's Sequence | |
| Matias et al. | A video scrambling technique based on space filling curves | |
| Yasser et al. | Aes-secured bit-cycling steganography in sliced 3d images | |
| CN104160292B (en) | Radar installations and method for processing radar signals | |
| EP3692387B1 (en) | Method for checking the association of radio nodes and of objects with a radio environment | |
| US20070164894A1 (en) | Non-statistical method for compressing and decompressing complex SAR data | |
| CN109874146B (en) | Method and device for predicting path loss | |
| CN104539393A (en) | Source coding method based on polar codes | |
| CA2596394A1 (en) | Optimum multifrequency electromagnetic signal for sea bed logging | |
| CN108900283A (en) | Transmit the method and communication equipment of information | |
| Macovei et al. | Image encryption algorithm using wavelet packets and multiple chaotic maps | |
| Huang et al. | Chaotic image encryption based on spiral traversal and finite field bidirectional diffusion | |
| Cao et al. | Two Boolean functions with five-valued Walsh spectra and high nonlinearity | |
| CN112285709A (en) | Atmospheric ozone remote sensing laser radar data fusion method based on deep learning | |
| CN109471077B (en) | Frequency hopping SAR echo signal generation method | |
| Almrabet et al. | Image compression using block truncation coding | |
| CN108199804B (en) | Serial port data transmitting method with error correction and encryption functions | |
| CN114885036B (en) | Real-time lossy compression method and system for ground penetrating radar data | |
| CN116186542A (en) | Ground penetrating radar signal resolution improving method and system based on deep learning | |
| CN114285549A (en) | Double-scanning 4-intensity MDI-QKD method and system based on modified coherent light source | |
| Xu et al. | A fast image encryption scheme based on a nonlinear chaotic map | |
| CN1141795C (en) | dual-diagonal differential space-time code transmitter and receiver | |
| Mulualem | Compression and encryption for satellite images: a comparison between squeeze cipher and spatial simulations |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211013 Address after: 250000 floor 24, block B, No. 188, Xiaoqinghe North Road, Tianqiao District, Jinan City, Shandong Province Patentee after: Zhongke satellite (Shandong) Technology Group Co.,Ltd. Address before: 100089 No.19, Beisihuan West Road, Haidian District, Beijing Patentee before: Aerospace Information Research Institute,Chinese Academy of Sciences Effective date of registration: 20211013 Address after: 100089 No.19, Beisihuan West Road, Haidian District, Beijing Patentee after: Aerospace Information Research Institute,Chinese Academy of Sciences Address before: 100190 No. 19 West North Fourth Ring Road, Haidian District, Beijing Patentee before: Institute of Electronics, Chinese Academy of Sciences |