CN207573447U - Millimeter wave digital modulation and demodulation system - Google Patents
Millimeter wave digital modulation and demodulation system Download PDFInfo
- Publication number
- CN207573447U CN207573447U CN201720103370.7U CN201720103370U CN207573447U CN 207573447 U CN207573447 U CN 207573447U CN 201720103370 U CN201720103370 U CN 201720103370U CN 207573447 U CN207573447 U CN 207573447U
- Authority
- CN
- China
- Prior art keywords
- circuit
- connect
- semiconductor
- oxide
- metal
- 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
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The utility model discloses a kind of millimeter wave digital modulation and demodulation systems, including interface circuit, code conversion circuit, scrambling/descrambling circuit, serial-parallel conversion circuit, differential encoding circuit, molding filtration circuit, interpolation filtering circuit, quadrature modulation circuit, filter DAC output circuits, if sampling circuit, low-pass filter circuit, synchronous extraction circuit, quadrature modulation circuit, matched filtering circuit, sampling decision circuitry, differential decoding circuit and parallel-to-serial converter, the interface circuit is connect with the code conversion circuit, the code conversion circuit is connect with the scrambling/descrambling circuit, scrambling/the descrambling circuit is connect again with the serial-parallel conversion circuit and parallel-to-serial converter respectively.The utility model stablizes high, good reliability.
Description
Technical field
The utility model is related to millimeter-wave technology fields, and in particular to a kind of millimeter wave digital modulation and demodulation system.
Background technology
Millimeter wave target acquisition is realized using the electromagnetic heat radiation of target, background, with visible ray and infrared acquisition phase
Than millimeter wave target acquisition has potential advantage under the adverse weather conditions such as mist, cloud, flue dust, sandstorm.Millimeter wave mesh at present
It marks detection system and mechanical scanning imaging mode is generally carried out using single antenna wave beam, but it is not high and clever there is spatial resolution
The relatively low deficiency of sensitivity.In recent years, it is highly sensitive with the rapid development of Millimeter Wave Solid State Devices and igh-speed wire-rod production line technology
Degree, high-resolution multiple-beam array target acquisition technology are just causing the great interest in military and civilian field.
Utility model content
The utility model overcomes the deficiencies in the prior art, provides the millimeter wave number that a kind of reliability is high, stability is good
Modulation demodulation system.
In view of the above problem of the prior art, one side according to the present utility model, the technology to solve above-mentioned is asked
Topic, the utility model use following technical scheme：
A kind of millimeter wave digital modulation and demodulation system, including interface circuit, code conversion circuit, scrambling/descrambling circuit, string
And conversion circuit, differential encoding circuit, molding filtration circuit, interpolation filtering circuit, quadrature modulation circuit, filtering DAC output electricity
Road, if sampling circuit, low-pass filter circuit, synchronous extraction circuit, quadrature modulation circuit, matched filtering circuit, sampling judge
Circuit, differential decoding circuit and parallel-to-serial converter, the interface circuit are connect with the code conversion circuit, and the pattern becomes
It changes circuit to connect with the scrambling/descrambling circuit, the scrambling/descrambling circuit is again respectively with the serial-parallel conversion circuit and and going here and there
Conversion circuit connects, and the serial-parallel conversion circuit connect with the differential encoding circuit, the differential encoding circuit and it is described into
Type filter circuit connects, and the molding filtration circuit connect with the interpolation filtering circuit, the interpolation filtering circuit with it is described
Quadrature modulation circuit connect, the quadrature modulation circuit with it is described filtering DAC output circuits connect, the parallel-to-serial converter and
The differential decoding circuit connection, the differential decoding circuit are connect with the sampling decision circuitry, the sampling decision circuitry
It is connect with the matched filtering circuit, the matched filtering circuit is connect with the quadrature modulation circuit, the orthogonal modulation electricity
Road is connect with the synchronous extraction circuit, and the synchronous extraction circuit is connect with the low-pass filter circuit, the low-pass filtering
Circuit is connect with the if sampling circuit.
In order to which the utility model is better achieved, further technical solution is：
An embodiment according to the present utility model, the parallel-to-serial converter include metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, MOS
Pipe Q3, metal-oxide-semiconductor Q4, metal-oxide-semiconductor Q5, metal-oxide-semiconductor Q6, resistance R1 and resistance R2, the metal-oxide-semiconductor Q1 source electrodes are connect with power supply, the MOS
Pipe Q1 drain electrodes are connect with the metal-oxide-semiconductor Q3 source electrodes and metal-oxide-semiconductor Q4 source electrodes, and the metal-oxide-semiconductor Q2 source electrodes are connect with power supply, the MOS
Pipe Q2 drain electrodes connects with the metal-oxide-semiconductor Q5 source electrodes and metal-oxide-semiconductor Q6 source electrodes, the metal-oxide-semiconductor Q3 drains and metal-oxide-semiconductor Q5 drains with it is described
Resistance R1 connections, the resistance R1 ground connection, the metal-oxide-semiconductor Q4 drain electrodes drain with the metal-oxide-semiconductor Q6 to be connect with resistance R2, the electricity
Hinder R2 ground connection.
Another embodiment according to the present utility model, shunt capacitance C1 on the resistance R1.
The utility model can also be：
Another embodiment according to the present utility model, shunt capacitance C2 on the resistance R2.
Compared with prior art, one of the beneficial effects of the utility model are：
The millimeter wave digital modulation and demodulation system of the utility model after pending data is by interface circuit, first passes through pattern change
It changes circuit 2 and carries out code conversion, convert the signal into the NRZ codes of suitable transmission.Then added by scrambling/descrambling circuit 3
Disturb, then carry out the Channel Processings such as serioparallel exchange and differential encoding, obtain making a gift to someone after signal molding filtration orthogonal modulation in again and again
Section filtering output, due to use digital modulation system, added between molding filtration and orthogonal modulation interpolation filtering with
Convenient for the design of the low-pass filter after DAC.In demodulating end, the intermediate-freuqncy signal received directly carries out intermediate frequency after bandpass filtering
Using so that it is subsequently full digital processing, the rate of sampled signal is higher, to carry out filtering extraction, to reduce the speed of signal
Rate.After data rate is dropped to manageable range, digital demodulation is carried out.Synchronizing information is extracted from signal first, then
The quadrature demodulation of signal is carried out using synchronizing information.Matched filtering is carried out to signal after I/Q two paths of signals is obtained, to obtain
Maximum signal-to-noise ratio, convenient for sampling judgement below, signal carries out channel decoding, obtains required data again.The utility model is steady
Fixed height, good reliability.
Description of the drawings
Illustrate present specification embodiment or technical solution of the prior art in order to clearer, it below will be to embodiment
Or attached drawing is briefly described needed in the description of the prior art, it should be apparent that, the accompanying drawings in the following description is only
It is the reference to some embodiments in present specification, for those skilled in the art, what is do not made the creative labor
In the case of, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the millimeter wave digital modulation and demodulation system block diagram according to the utility model one embodiment.
Fig. 2 is the string converting circuit structure schematic diagram according to the utility model one embodiment.
Wherein, it is entitled corresponding to the reference numeral in attached drawing：
1- interface circuits, 2- code conversion circuits, 3- scramblings/descrambling circuit, 4- serial-parallel conversion circuits, 5- difference
Coding circuit, 6- molding filtration circuits, 7- interpolation filtering circuits, 8- quadrature modulation circuits, 9- filtering DAC output circuits,
10- if sampling circuits, 11- low-pass filter circuits, 12- synchronous extraction circuits, 13- quadrature modulation circuits, 14- matchings
Filter circuit, 15- sampling decision circuitries, 16- differential decoding circuits, 17- parallel-to-serial converters.
Specific embodiment
The utility model is described in further detail with reference to embodiment, but the embodiment of the utility model is not
It is limited to this.
As shown in Figure 1, Fig. 1 shows the millimeter wave digital modulation and demodulation system according to the utility model one embodiment,
A kind of millimeter wave digital modulation and demodulation system including interface circuit 1, code conversion circuit 2, scrambling/descrambling circuit 3, string and turns
Change circuit 4, differential encoding circuit 5, molding filtration circuit 6, interpolation filtering circuit 7, quadrature modulation circuit 8, filtering DAC output electricity
Road 9, if sampling circuit 10, low-pass filter circuit 11, synchronous extraction circuit 12, quadrature modulation circuit 13, matched filtering circuit
14th, sampling decision circuitry 15, differential decoding circuit 16 and parallel-to-serial converter 17, the interface circuit 1 and the code conversion
Circuit 2 connects, and the code conversion circuit 2 is connect with the scrambling/descrambling circuit 3, and the scrambling/descrambling circuit 3 is distinguished again
It is connect with the serial-parallel conversion circuit 4 and parallel-to-serial converter 17, the serial-parallel conversion circuit 4 and the differential encoding circuit 5
Connection, the differential encoding circuit 5 are connect with the molding filtration circuit 6, the molding filtration circuit 6 and the interpolation filtering
Circuit 7 connects, and the interpolation filtering circuit 7 is connect with the quadrature modulation circuit 8, the quadrature modulation circuit 8 and the filter
Wave DAC output circuits 9 connect, and the parallel-to-serial converter 17 is connect with the differential decoding circuit 16, the differential decoding electricity
Road 16 is connect with the sampling decision circuitry 15, and the sampling decision circuitry 15 is connect with the matched filtering circuit 14, described
Matched filtering circuit 14 is connect with the quadrature modulation circuit 13, the quadrature modulation circuit 13 and the synchronous extraction circuit 12
Connection, the synchronous extraction circuit 12 are connect with the low-pass filter circuit 11, the low-pass filter circuit 11 and the intermediate frequency
Sample circuit 10 connects.
This millimeter wave digital modulation and demodulation system, after pending data is by interface circuit 1, first pass through code conversion circuit 2 into
Row code conversion converts the signal into the NRZ codes of suitable transmission.Then it is scrambled, then carried out by scrambling/descrambling circuit 3
The Channel Processings such as serioparallel exchange and differential encoding, the orthogonal modulation that obtains making a gift to someone after signal molding filtration filter defeated to intermediate-frequency band
Go out, due to using digital modulation system, after interpolation filtering is added between molding filtration and orthogonal modulation in order to DAC
Low-pass filter design.In demodulating end, the intermediate-freuqncy signal received directly carries out intermediate frequency use after bandpass filtering so that
It is subsequently full digital processing, the rate of sampled signal is higher, to carry out filtering extraction, to reduce the rate of signal.Number
After dropping to manageable range according to rate, digital demodulation is carried out.Synchronizing information is extracted from signal first, recycles synchronous letter
Cease the quadrature demodulation to carry out signal.Matched filtering is carried out to signal after I/Q two paths of signals is obtained, to obtain maximum noise
Than convenient for sampling judgement below, signal carries out channel decoding, obtains required data again.
It is described and go here and there as shown in Fig. 2, Fig. 2 shows the string converting circuit structure according to the utility model one embodiment
Conversion circuit 17 includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, metal-oxide-semiconductor Q5, metal-oxide-semiconductor Q6, resistance R1 and resistance R2,
The metal-oxide-semiconductor Q1 source electrodes are connect with power supply, and the metal-oxide-semiconductor Q1 drain electrodes are connect with the metal-oxide-semiconductor Q3 source electrodes and metal-oxide-semiconductor Q4 source electrodes,
The metal-oxide-semiconductor Q2 source electrodes are connect with power supply, and the metal-oxide-semiconductor Q2 drain electrodes are connect with the metal-oxide-semiconductor Q5 source electrodes and metal-oxide-semiconductor Q6 source electrodes,
Metal-oxide-semiconductor Q3 drain electrode and metal-oxide-semiconductor Q5 drain electrodes connects with the resistance R1, and the resistance R1 is grounded, the metal-oxide-semiconductor Q4 drain and
The metal-oxide-semiconductor Q6 drain electrodes are connect with resistance R2, the resistance R2 ground connection.Shunt capacitance C1 on the resistance R1.The resistance R2
Upper shunt capacitance C2.
In figure, A1 and B1 are parallel two bits, and A1 and A1_N differential signals each other, B1 and BI_N each other believe by difference
Number, CLK and CLKN is sampled clock signal and inverting each other.A_OUT and B_OUT is serial output signal.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with it is other
The difference of embodiment, identical similar portion cross-reference between each embodiment.
Although reference be made herein to the utility model is described in multiple explanatory embodiments of the utility model, still,
It should be understood that those skilled in the art can be designed that a lot of other modifications and embodiment, these modifications and embodiment
It will fall within spirit disclosed in the present application and spirit.
Claims (4)
1. a kind of millimeter wave digital modulation and demodulation system, it is characterised in that including interface circuit (1), code conversion circuit (2), add
Disturb/descrambling circuit (3), serial-parallel conversion circuit (4), differential encoding circuit (5), molding filtration circuit (6), interpolation filtering circuit
(7), quadrature modulation circuit (8), filtering DAC output circuits (9), if sampling circuit (10), low-pass filter circuit (11), synchronization
Extract circuit (12), quadrature modulation circuit (13), matched filtering circuit (14), sampling decision circuitry (15), differential decoding circuit
(16) it is connect with parallel-to-serial converter (17), the interface circuit (1) with the code conversion circuit (2), the code conversion
Circuit (2) is connect with the scrambling/descrambling circuit (3), and the scrambling/descrambling circuit (3) is electric with the serioparallel exchange respectively again
Road (4) and parallel-to-serial converter (17) connection, the serial-parallel conversion circuit (4) connect with the differential encoding circuit (5), described
Differential encoding circuit (5) is connect with the molding filtration circuit (6), the molding filtration circuit (6) and interpolation filtering electricity
Road (7) connects, and the interpolation filtering circuit (7) connect with the quadrature modulation circuit (8), the quadrature modulation circuit (8) and
The filtering DAC output circuits (9) connect, and the parallel-to-serial converter (17) connect with the differential decoding circuit (16), institute
It states differential decoding circuit (16) to connect with the sampling decision circuitry (15), the sampling decision circuitry (15) matches filter with described
Wave circuit (14) connects, and the matched filtering circuit (14) connect with the quadrature modulation circuit (13), the orthogonal modulation electricity
Road (13) is connect with the synchronous extraction circuit (12), and the synchronous extraction circuit (12) connects with the low-pass filter circuit (11)
It connects, the low-pass filter circuit (11) connect with the if sampling circuit (10).
2. millimeter wave digital modulation and demodulation system according to claim 1, it is characterised in that the parallel-to-serial converter
(17) it is described including metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, metal-oxide-semiconductor Q5, metal-oxide-semiconductor Q6, resistance R1 and resistance R2
Metal-oxide-semiconductor Q1 source electrodes are connect with power supply, and the metal-oxide-semiconductor Q1 drain electrodes are connect with the metal-oxide-semiconductor Q3 source electrodes and metal-oxide-semiconductor Q4 source electrodes, described
Metal-oxide-semiconductor Q2 source electrodes are connect with power supply, and the metal-oxide-semiconductor Q2 drain electrodes are connect with the metal-oxide-semiconductor Q5 source electrodes and metal-oxide-semiconductor Q6 source electrodes, described
Metal-oxide-semiconductor Q3 drains and metal-oxide-semiconductor Q5 drain electrodes are connect with the resistance R1, the resistance R1 ground connection, the metal-oxide-semiconductor Q4 drain electrodes and institute
It states metal-oxide-semiconductor Q6 drain electrodes to connect with resistance R2, the resistance R2 ground connection.
3. millimeter wave digital modulation and demodulation system according to claim 2, it is characterised in that in parallel electric on the resistance R1
Hold C1.
4. millimeter wave digital modulation and demodulation system according to claim 2, it is characterised in that in parallel electric on the resistance R2
Hold C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720103370.7U CN207573447U (en) | 2017-01-25 | 2017-01-25 | Millimeter wave digital modulation and demodulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720103370.7U CN207573447U (en) | 2017-01-25 | 2017-01-25 | Millimeter wave digital modulation and demodulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207573447U true CN207573447U (en) | 2018-07-03 |
Family
ID=62696583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720103370.7U Active CN207573447U (en) | 2017-01-25 | 2017-01-25 | Millimeter wave digital modulation and demodulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207573447U (en) |
-
2017
- 2017-01-25 CN CN201720103370.7U patent/CN207573447U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201918010U (en) | Voltage-current collecting and transmitting device for high-voltage system | |
| CN102420609B (en) | Novel IRIG (Inter Range Instrumentation Group)-B alternating current code intelligent decoding method | |
| CN104954061A (en) | High-speed sampling low-speed processing system and high-speed sampling low-speed processing method | |
| CN108241143B (en) | Method for realizing fast frequency measurement and tracking output device based on Costas loop | |
| CN101420538B (en) | Imaging circuit system for space multi-spectral linear array CCD remote sensor | |
| CN213069007U (en) | Frequency division type frequency measuring machine with novel structure | |
| CN103051375B (en) | Wireless laser communication heterodyne detection system and detection method thereof | |
| CN207573447U (en) | Millimeter wave digital modulation and demodulation system | |
| CN201583601U (en) | High-low voltage comprehensive phase sequence and phase position instrument | |
| CN208112621U (en) | A kind of sample circuit applied to radar communications system | |
| CN106027442B (en) | Modem based on scattered pilot | |
| CN217332718U (en) | Millimeter wave local oscillator leakage calibrating device | |
| CN111988054B (en) | Signal receiving system for receiving terminal signals of Internet of things | |
| CN203759710U (en) | Radio frequency identification card reader chip | |
| CN213637760U (en) | Dual-mode underwater wireless optical receiver | |
| CN105530213B (en) | A kind of mixing baseband system for high-speed communication | |
| CN209821645U (en) | Well site non-contact data acquisition system based on unmanned intelligent cruise machine | |
| CN201185431Y (en) | Phase shift keying demodulator | |
| CN103812505A (en) | Bit synchronization lock detector | |
| CN209419713U (en) | A kind of spaceborne short-wave infrared signal processing circuit | |
| CN209979742U (en) | Wireless signal detection device | |
| CN207075013U (en) | Millimeter-wave communication system | |
| CN106814648A (en) | A kind of non-contact type photoelectricity slip-ring device control system | |
| CN202918281U (en) | A universal expandable digital intermediate frequency receiver | |
| CN105871458A (en) | Test board for testing parameters of optical module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |