CN205608175U - Five -way says that intermediate frequency digital receiving is quick -witted - Google Patents
Five -way says that intermediate frequency digital receiving is quick -witted Download PDFInfo
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- CN205608175U CN205608175U CN201620284751.5U CN201620284751U CN205608175U CN 205608175 U CN205608175 U CN 205608175U CN 201620284751 U CN201620284751 U CN 201620284751U CN 205608175 U CN205608175 U CN 205608175U
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Abstract
The utility model belongs to radar electron field, in particular to five -way says that intermediate frequency digital receiving is quick -witted. The utility model discloses a FPGA chip, both -way communication is connected between FPGA chip and first sampling channel module, second sampling channel module, third sampling channel module, fourth sampling channel module, the transmission sample passageway module, echo signal, sample signal are connected respectively to the input of sampling channel module, transmission sample passageway module, the FPGA chip still with 15 tunnel chronogenesis inputoutput interface, first fiber optical transceiver, second fiber optical transceiver, ethernet configuration chip between both -way communication be connected, chronogenesis inputoutput interface, fiber optical transceiver, ethernet configuration chip digital output orthogonal signal to rear end equipment. Consequently the utility model discloses has possessed 120dB great dynamic range 's intermediate frequency digital receiving ability, moreover the utility model discloses still possess simple structure, low cost, the high characteristics of sensitivity.
Description
Technical field
This utility model belongs to radar electric field, particularly to a kind of Five-channel intermediate frequency digital receiver.
Background technology
In digitized radar system, intermediate frequency digital receiver is the pass that analogue signal is converted into digital signal
Key link, is acquired analog intermediate frequency signal by analog-digital converter, is translated into digital quadrature letter
Number, then it is carried out Digital Down Convert process and be transformed in baseband frequency, and by optical fiber or net
Data transmission after mouth will process carries out further calculation process to signal processor or miscellaneous equipment.Therefore
The precision of intermediate frequency digital receiver sampling, sensitivity, dynamic range directly influence whole radar system
Precision, sensitivity and dynamic range.
The full accuracy of the analog-digital converter of if sampling is 16 at present, the letter under Sampling Rate
Make an uproar ratio generally about 75dB, and the process counting Digital Down Convert in is benefited, at the arteries and veins that weather radar is conventional
In the range of width, its dynamic range is about 80dB～90dB, therefore bigger for some dynamic range requirements
Occasion tend not to meet demand, the dynamic range therefore promoting intermediate frequency digital receiver is needs
The problem solved.
Utility model content
This utility model is in order to overcome above-mentioned the deficiencies in the prior art, it is provided that a kind of Five-channel intermediate frequency digital
Receiver, this utility model provides that a kind of dynamic range is big, simple in construction, with low cost, sensitivity
High receiver.
For achieving the above object, this utility model have employed techniques below measure:
A kind of Five-channel intermediate frequency digital receiver, including main processor modules, described main processor modules with
Between sampling channel module, transmitting sample channel module, two-way communication connects, described sampling channel module,
The input launching sample channel module connects echo-signal, sample signal respectively；
This digital receiver is just also including interface and mixed-media network modules mixed-media, described interface and mixed-media network modules mixed-media output numeral
Hand over signal to rear end equipment.
This utility model can also be realized further by techniques below measure.
Preferably, described transmitting sample channel module includes the first AD conversion unit, the first lower change of numeral
Frequently unit, digital Frequency Measuring unit, first phase collecting unit, the input of described first AD conversion unit is even
Connecing sample signal, the outfan of the first AD conversion unit connects the input of the first Digital Down Convert unit
End, the outfan of described first Digital Down Convert unit connects the input of digital Frequency Measuring unit, described number
The outfan of word frequency senser connects sampling channel module, the input of first phase collecting unit, described first phase
The outfan of collecting unit connects the input of sampling channel module.
Preferably, described sampling channel module include the first sampling channel module, the second sampling channel module,
3rd sampling channel module, the 4th sampling channel module, described first sampling channel module, the second sampling
Channel module, the 3rd sampling channel module, the 4th sampling channel module are all and double between main processor modules
To communication connection；
Described first sampling channel module, the second sampling channel module, the 3rd sampling channel module, the 4th
Sampling channel module all includes the second AD conversion unit, the second Digital Down Convert unit, phase only pupil filter list
Unit, the input of the second AD conversion unit in sampling channel module is all connected with echo-signal, and described
Two AD conversion unit, the outfan of digital Frequency Measuring unit are all connected with the input of the second Digital Down Convert unit
End, described second Digital Down Convert unit, the outfan of first phase collecting unit are all connected with phase only pupil filter unit
Input, the phase only pupil filter unit in described first sampling channel module and the second sampling channel module
Outfan is all connected with the input of the first dynamic concatenation unit, the outfan of the described first dynamic concatenation unit
Connect the input of the first gain-boosted op amp unit；
The output of the phase only pupil filter unit in described 3rd sampling channel module and the 4th sampling channel module
End is all connected with the input of the second dynamic concatenation unit, and the outfan of the described second dynamic concatenation unit connects
The input of the second gain-boosted op amp unit；Described first gain-boosted op amp unit, the second gain-boosted op amp unit
Outfan is all connected with the input of interface and mixed-media network modules mixed-media.
Preferably, described second Digital Down Convert unit includes numerically-controlled oscillator, described digital control
The input of agitator connects the outfan of digital Frequency Measuring unit, two outfans of numerically-controlled oscillator
Connect the first multiplier, the input of the second multiplier, described first multiplier, the second multiplier respectively
Another input be all connected with the input of the second AD conversion unit, the first multiplier, the second multiplier
Outfan connect the first wave filter, the input of the second wave filter respectively, described first wave filter,
The outfan of two wave filter is all connected with the input of phase only pupil filter unit.
Preferably, described phase only pupil filter unit includes complex multiplier, the input of described complex multiplier
Connect the first wave filter, the second wave filter, the outfan of first phase collecting unit, described complex multiplier
Outfan connects the input of dynamic concatenation unit.
Further, described interface and mixed-media network modules mixed-media be sequential input/output interface, the first fiber optical transceiver,
Second fiber optical transceiver, Ethernet Configuration chip, described sequential input/output interface, the first optical fiber transceiving
Device, the second fiber optical transceiver, Ethernet Configuration chip output digital quadrature signal is to rear end equipment.
Further, this digital receiver also includes what outfan was connected with the input of main processor modules
FPGA configuration chip, storage chip, serial port level conversion chip and temperature sensor chip.
Further, the model of described main processor modules is that altera corp of the U.S. produces
EP4SGX230 chip；Described first AD conversion unit, the model of the second AD conversion unit are U.S.
The AD9460 chip that AD company of state produces.
Further, described first fiber optical transceiver, the model of the second fiber optical transceiver are France Avago
The AFCT5701ALZ chip that company produces；The model of described Ethernet Configuration chip is Korea S WIZnet
The W5300 chip that company produces.
The beneficial effects of the utility model are:
1), this utility model includes main processor modules, described main processor modules and sampling channel mould
Between block, transmitting sample channel module, two-way communication connects, and described sampling channel module, transmitting sample lead to
The input of road module connects echo-signal, sample signal, described echo-signal, sample signal warp respectively
Cross described interface and mixed-media network modules mixed-media exports to rear end equipment.By launching the numeral survey in sample channel module
Frequently unit can realize the real-time frequency measurement to sample signal, it is ensured that the echo-signal frequency spectrum of reception all the time can
It is shifted on zero-frequency；Non-coherent signal can be turned by the phase only pupil filter unit in sampling channel module simultaneously
Turn to the echo-signal of coherent, improve the coherent performance of radar, and two sampling channel modules are passed through
Dynamically concatenation unit, gain-boosted op amp unit, it is possible to achieve any two sampling channel is carried out in intensity
Splicing, therefore this utility model has possessed the intermediate frequency digital receiving ability of 120dB Larger Dynamic scope, and
This utility model is also equipped with simple in construction, with low cost, highly sensitive feature.
2), the model of described main processor modules is the EP4SGX230 core that altera corp of the U.S. produces
Sheet；It is raw that described first AD conversion unit, the model of the second AD conversion unit are AD company of the U.S.
The AD9460 chip produced；First fiber optical transceiver, the model of the second fiber optical transceiver are France Avago
The AFCT5701ALZ chip that company produces；The model of described Ethernet Configuration chip is Korea S WIZnet
The W5300 chip that company produces.The parts of above-mentioned multiple specific model are worked in coordination, it is achieved that this practicality
Novel optimal design.
Accompanying drawing explanation
Fig. 1 is circuit composition frame chart of the present utility model；
Fig. 2 is the circuit composition frame chart of sampling channel module of the present utility model and sample channel module；
Fig. 3 is the second Digital Down Convert unit of the present utility model and the composition frame of phase only pupil filter element circuit
Figure；
Fig. 4 is the fundamental diagram of digital Frequency Measuring unit of the present utility model.
Reference implication in figure is as follows:
10 main processor modules 20 first sampling channel modules
21 second AD conversion unit 22 second Digital Down Convert unit
The 23 dynamic concatenation units of phase only pupil filter unit 24 first
The 25 first dynamic concatenation units of gain-boosted op amp unit 26 second
27 second gain-boosted op amp unit 30 second sampling channel modules
40 the 3rd sampling channel module 50 the 4th sampling channel modules
60 sample channel module 61 first AD conversion unit
62 first Digital Down Convert unit 63 digital Frequency Measuring unit
64 first phase collecting unit 70 first fiber optical transceivers
80 second fiber optical transceiver 90 Ethernet Configuration chips
221 numerically-controlled oscillator 222 first multipliers
223 second multiplier 224 first wave filter
225 second wave filter
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technology in this utility model embodiment
Scheme is clearly and completely described, it is clear that described embodiment is only this utility model one
Divide embodiment rather than whole embodiments.Based on the embodiment in this utility model, this area is common
The every other embodiment that technical staff is obtained under not making creative work premise, broadly falls into this
The scope of utility model protection.
As it is shown in figure 1, a kind of Five-channel intermediate frequency digital receiver, including fpga chip 10, described FPGA
Chip 10 and first sampling channel module the 20, second sampling channel module the 30, the 3rd sampling channel module
40, between the 4th sampling channel module 50, transmitting sample channel module 60, two-way communication connects；Described
Sampling channel module, the input of transmitting sample channel module 60 connect echo-signal, sample letter respectively
Number；Described fpga chip 10 Hai Yu 15 tunnel sequential input/output interface, the first fiber optical transceiver 70,
Between second fiber optical transceiver 80, Ethernet Configuration chip 90, two-way communication connects, described 15 tunnel sequential
Input/output interface, fiber optical transceiver, Ethernet Configuration chip 90 export digital quadrature signal to rear end
Equipment.
The model of described main processor modules 10 is the EP4SGX230 chip that altera corp of the U.S. produces；
It is raw that the model of described first AD conversion unit the 61, second AD conversion unit 21 is AD company of the U.S.
The AD9460 chip produced；The model of described first fiber optical transceiver the 70, second fiber optical transceiver 80 is
The AFCT5701ALZ chip that Avago company of France produces；The model of described Ethernet Configuration chip 90
The W5300 chip produced for WIZnet company of Korea S.
As in figure 2 it is shown, described transmitting sample channel module 60 include the first AD conversion unit 61,
One Digital Down Convert unit 62, digital Frequency Measuring unit 63, first phase collecting unit 64, described first modulus
The input of converting unit 61 connects sample signal, and the outfan of the first AD conversion unit 61 connects the
The input of one Digital Down Convert unit 62, the outfan of described first Digital Down Convert unit 62 connects
The input of digital Frequency Measuring unit 63, the outfan of described digital Frequency Measuring unit 63 connects sampling channel mould
Block, the input of first phase collecting unit 64, it is logical that the outfan of described first phase collecting unit 64 connects sampling
The input of road module.
Described first sampling channel module the 20, second sampling channel module the 30, the 3rd sampling channel module
40, the 4th sampling channel module 50 all includes second AD conversion unit the 21, second Digital Down Convert list
Unit 22, phase only pupil filter unit 23, the input of the second AD conversion unit 21 in sampling channel module
Be all connected with echo-signal, described second AD conversion unit 21, digital Frequency Measuring unit 63 outfan equal
Connect the input of the second Digital Down Convert unit 22, described second Digital Down Convert unit 22, first phase
The outfan of collecting unit 64 is all connected with the input of phase only pupil filter unit 23, described first sampling channel
The outfan of the phase only pupil filter unit 23 in module 20 and the second sampling channel module 30 is all connected with first
The dynamically input of concatenation unit 24, the outfan of the described first dynamic concatenation unit 24 connects the first increasing
The input of benefit amending unit 25；
Phase only pupil filter unit 23 in described 3rd sampling channel module 40 and the 4th sampling channel module 50
Outfan be all connected with the input of the second dynamic concatenation unit 26, the described second dynamic concatenation unit 26
Outfan connect the input of the second gain-boosted op amp unit 27；Described first gain-boosted op amp unit 25,
The outfan of the second gain-boosted op amp unit 27 is all connected with the input of interface and mixed-media network modules mixed-media.
As it is shown on figure 3, described second Digital Down Convert unit 22 includes numerically-controlled oscillator 221, institute
The input stating numerically-controlled oscillator 221 connects the outfan of digital Frequency Measuring unit 63, digital control
Two outfans of agitator 221 connect the input of first multiplier the 222, second multiplier 223 respectively
End, another input of described first multiplier the 222, second multiplier 223 is all connected with the second modulus and turns
Changing the input of unit 21, the outfan of first multiplier the 222, second multiplier 223 connects respectively
The input of one wave filter the 224, second wave filter 225, described first wave filter 224, second filters
The outfan of device 225 is all connected with the input of the complex multiplier of phase only pupil filter unit 23.
This utility model in use, can coordinate with software of the prior art and use.Below
In conjunction with software of the prior art, operation principle of the present utility model is described, it must be noted that
It is: the software matched with this utility model is not innovative part of the present utility model, is not this practicality
Novel ingredient.
As shown in Figure 2,3, sample signal is converted into 16 figure places after the first AD conversion unit 61
Word signal, then obtained one group of quadrature samples signal through the first Digital Down Convert unit 62；Echo is believed
Number after the second AD conversion unit 21, it is converted into 16 position digital signals；By digital Frequency Measuring unit 63
This group quadrature samples signal is carried out frequency measurement, obtains the frequency of current sample signal, by this sample signal
Frequency try to achieve the precise frequency of the output of numerically-controlled oscillator 221 in the second Digital Down Convert unit 22
Value, numerically-controlled oscillator 221 exports cosine sequences and the sine of corresponding frequencies respectively according to frequency measurement result
Serial No., the digital intermediate frequency signal after sampling is multiplied respectively with the two sequence, filters base the most respectively
Frequency component beyond band, has thus obtained initial digital quadrature signal, initial digital quadrature letter
Number by a complex multiplier and the conjugate multiplication of sample channel first phase orthogonal signalling, at original orthogonal letter
Number phase place on deducted this initial phase, it is ensured that the coherent pulse signalf of signal.By first phase collecting unit
64 inputs that first phase is sent to phase only pupil filter unit 23, phase only pupil filter unit 23 is by described first phase
Revise the digital quadrature signal of four sampling channel modules, make described digital quadrature signal by non-coherent signal
It is converted into coherent signal.
A sampling channel module is allowed to realize the system dynamics of 80dB when design, another sampling channel
Module realizes the system dynamics of 40dB, large gain sampling channel module realize echo strength for-104dBm～
The normal signal reception of 30dBm, little gain sampling channel module realize echo strength for-30dBm～
The normal signal reception of+16dBm, the echo strength of detection the two sampling channel module, when little gain is adopted
When echo strength in sample channel module is more than certain threshold value, then choose little gain sampling channel module through phase
The position revised digital quadrature signal of amending unit 23 is as the echo-signal of current distance；If little gain
When echo strength in sampling channel module is less than this threshold value, then choose high-gain sampling channel module through phase
The position revised digital quadrature signal of amending unit 23, as the echo-signal of current distance, therefore just will
The echo of two sampling channel modules is integrated into the echo strength of a passage, the sampling channel after integration
The dynamic range of module is-104dBm～+16dBm, and therefore this utility model has possessed 120dB Larger Dynamic
The intermediate frequency digital receiving ability of scope.
As shown in Figure 4, one group of quadrature samples has been obtained after 16 position digital signals being carried out Digital Down Convert
Signal, does the FFT modulus again of 1024 to described quadrature samples signal, and maximizing is corresponding
Frequency position on spectral line, and centered by this position, carry out first moment correction, finally can draw
Launch sample channel module and control the side-play amount of agitator 221 output frequency relative to Contemporary Digital, use institute
State side-play amount to revise the output frequency of numerically-controlled oscillator 221.
Claims (9)
1. a Five-channel intermediate frequency digital receiver, including main processor modules (10), its feature exists
In: described main processor modules (10) and sampling channel module, launch sample channel module (60) it
Between two-way communication connect, described sampling channel module, launch sample channel module (60) input divide
Do not connect echo-signal, sample signal；
This digital receiver is just also including interface and mixed-media network modules mixed-media, described interface and mixed-media network modules mixed-media output numeral
Hand over signal to rear end equipment.
2. a kind of Five-channel intermediate frequency digital receiver as claimed in claim 1, it is characterised in that: institute
State transmitting sample channel module (60) and include the first AD conversion unit (61), the first Digital Down Convert
Unit (62), digital Frequency Measuring unit (63), first phase collecting unit (64), described first modulus turns
The input changing unit (61) connects sample signal, and the outfan of the first AD conversion unit (61) is even
Connect the input of the first Digital Down Convert unit (62), described first Digital Down Convert unit (62)
Outfan connects the input of digital Frequency Measuring unit (63), the output of described digital Frequency Measuring unit (63)
End connects sampling channel module, the input of first phase collecting unit (64), described first phase collecting unit (64)
Outfan connect sampling channel module input.
3. a kind of Five-channel intermediate frequency digital receiver as claimed in claim 2, it is characterised in that: institute
State sampling channel module include the first sampling channel module (20), the second sampling channel module (30),
3rd sampling channel module (40), the 4th sampling channel module (50), described first sampling channel mould
Block (20), the second sampling channel module (30), the 3rd sampling channel module (40), the 4th sampling
Channel module (50) is all connected with two-way communication between main processor modules (10)；
Described first sampling channel module (20), the second sampling channel module (30), the 3rd sampling are led to
Road module (40), the 4th sampling channel module (50) all include the second AD conversion unit (21),
Second Digital Down Convert unit (22), phase only pupil filter unit (23), second in sampling channel module
The input of AD conversion unit (21) is all connected with echo-signal, described second AD conversion unit (21),
The outfan of digital Frequency Measuring unit (63) is all connected with the input of the second Digital Down Convert unit (22),
Described second Digital Down Convert unit (22), the outfan of first phase collecting unit (64) are all connected with phase place
The input of amending unit (23), described first sampling channel module (20) and the second sampling channel mould
The outfan of the phase only pupil filter unit (23) in block (30) is all connected with the first dynamic concatenation unit (24)
Input, the outfan of the described first dynamic concatenation unit (24) connects the first gain-boosted op amp unit (25)
Input；
Phase only pupil filter in described 3rd sampling channel module (40) and the 4th sampling channel module (50)
The outfan of unit (23) is all connected with the input of the second dynamic concatenation unit (26), and described second moves
The outfan of state concatenation unit (26) connects the input of the second gain-boosted op amp unit (27)；Described
One gain-boosted op amp unit (25), the outfan of the second gain-boosted op amp unit (27) are all connected with interface and net
The input of network module.
4. a kind of Five-channel intermediate frequency digital receiver as claimed in claim 3, it is characterised in that: institute
State the second Digital Down Convert unit (22) and include numerically-controlled oscillator (221), described digital control
The input of agitator (221) connects the outfan of digital Frequency Measuring unit (63), digital control vibration
Two outfans of device (221) connect the first multiplier (222), the second multiplier (223) respectively
Input, described first multiplier (222), another input of the second multiplier (223) all connect
Connect the input of the second AD conversion unit (21), the first multiplier (222), the second multiplier (223)
Outfan connect the first wave filter (224), the input of the second wave filter (225) respectively, described
First wave filter (224), the outfan of the second wave filter (225) are all connected with phase only pupil filter unit (23)
Input.
5. a kind of Five-channel intermediate frequency digital receiver as claimed in claim 4, it is characterised in that: institute
Stating phase only pupil filter unit (23) and include complex multiplier, the input of described complex multiplier connects first
Wave filter (224), the second wave filter (225), the outfan of first phase collecting unit (64), described
The outfan of complex multiplier connects the input of dynamic concatenation unit.
6. a kind of Five-channel intermediate frequency digital receiver as described in claim 1 or 3, it is characterised in that:
Described interface and mixed-media network modules mixed-media are sequential input/output interface, the first fiber optical transceiver (70), the second light
Fine transceiver (80), Ethernet Configuration chip (90), described sequential input/output interface, the first light
Fine transceiver (70), the second fiber optical transceiver (80), Ethernet Configuration chip (90) output numeral
Orthogonal signalling are to rear end equipment.
7. a kind of Five-channel intermediate frequency digital receiver as described in any one of Claims 1 to 5, its feature
It is: this digital receiver also includes the FPGA that outfan is connected with the input of main processor modules (10)
Configuration chip, storage chip, serial port level conversion chip and temperature sensor chip.
8. a kind of Five-channel intermediate frequency digital receiver as claimed in claim 3, it is characterised in that: institute
The model stating main processor modules (10) is the EP4SGX230 chip that altera corp of the U.S. produces；
Described first AD conversion unit (61), the model of the second AD conversion unit (21) are U.S. AD
The AD9460 chip that company produces.
9. a kind of Five-channel intermediate frequency digital receiver as claimed in claim 6, it is characterised in that: institute
State the first fiber optical transceiver (70), the model of the second fiber optical transceiver (80) is France's Avago public affairs
The AFCT5701ALZ chip that department produces；The model of described Ethernet Configuration chip (90) is Korea S WIZnet
The W5300 chip that company produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620284751.5U CN205608175U (en) | 2016-04-06 | 2016-04-06 | Five -way says that intermediate frequency digital receiving is quick -witted |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620284751.5U CN205608175U (en) | 2016-04-06 | 2016-04-06 | Five -way says that intermediate frequency digital receiving is quick -witted |
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| Publication Number | Publication Date |
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| CN205608175U true CN205608175U (en) | 2016-09-28 |
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ID=56964535
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620284751.5U Active CN205608175U (en) | 2016-04-06 | 2016-04-06 | Five -way says that intermediate frequency digital receiving is quick -witted |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336573A (en) * | 2019-05-29 | 2019-10-15 | 安徽四创电子股份有限公司 | A kind of X-band Larger Dynamic receiver |
-
2016
- 2016-04-06 CN CN201620284751.5U patent/CN205608175U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336573A (en) * | 2019-05-29 | 2019-10-15 | 安徽四创电子股份有限公司 | A kind of X-band Larger Dynamic receiver |
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