CN201259542Y - Time-division multi-element random code generator for radar - Google Patents
Time-division multi-element random code generator for radar Download PDFInfo
- Publication number
- CN201259542Y CN201259542Y CNU2008201630821U CN200820163082U CN201259542Y CN 201259542 Y CN201259542 Y CN 201259542Y CN U2008201630821 U CNU2008201630821 U CN U2008201630821U CN 200820163082 U CN200820163082 U CN 200820163082U CN 201259542 Y CN201259542 Y CN 201259542Y
- Authority
- CN
- China
- Prior art keywords
- radar
- random code
- code generator
- voltage comparator
- generator
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
The utility model relates to radar technical field, in particular to a radar time-division multivariate random code generator, which comprises a broadband noise generator, n groups of surface acoustic wave filter (SAW) band-pass filter, a microwave broadband amplifier, a voltage comparator, a sampling holder and an active integrator; the PN junction of a noise diode is doped to form an annular diffusion zone to restrain the generation of flicker uncontrollable noise; the code frequency of the broadband noise generator accesses to n groups of band-pass filter amplifiers, the voltage comparator and the sampling holder through the cascade segmentation mode from low to high to output P<1>, P<2> and P<n> group random two-phase code, and the feedback is processed by the active integrator to form n-path pulse through coding on a time-division circuit for a radar phase regulator and a multi-channel pulse pressure correlator; the resolving power is higher as the detection target is closer; the linear increasing resolving power accumulates detection signals to improve the distinguishing of target details; the environment works in the same region has no mutual interference, and the situation that a continuous wave radar transmits signal to block the receiving of echo wave is overcome; and the blind distance is eliminated. The radar time-division multivariate random code generator is applicable to anti-collision radars of automobiles and ships, and other multi-target detection radars.
Description
Technical field
The utility model relates to the Radar Technology field, specifically is a kind of time division multi-random code generator for radar.
Background technology
Prior art random signal continuous wave radar, emission has very high antijamming capability with reception random signal relevant treatment, be expected to be resolved in the Electro Magnetic Compatibility EMC of many radar operating environments of the same area problem, but it is even that noise generator PN junction diode applies reverse biased pipe chip current unevenness, produced uncontrollable noise effect random signal produce probability, reduce the detections of radar performance.And the prior art RANDOM SIGNAL RADAR detects target sizes, the far and near resolving power of distance is single, the aperiodicity of random signal, and the detection signal accumulation improves the detection factor to be needed to be solved.Random signal continuous wave radar antenna emitted energy leaks the reception of blocking echo, and the pulsed radar pulsewidth is blocked the echo reception, and produce the blind range influence and detect,
Summary of the invention
The purpose of this utility model provide sign indicating number frequently, symbol width independently produces, sign indicating number increases progressively arrangement frequently and successively decrease a kind of time division multi-random code generator for radar of arrangement of symbol width.
Technical solutions of the utility model are that time division circuit is by counter, monostalbe trigger, code translator, code switch, the asynchronous storbing gate of sequential constitutes, the counter clock end, monostalbe trigger input termination clock signal, multi-random code generator is by wideband noise generator, wideband noise generator, sound table device SAW bandpass filter, microwave broadband amplifier and n group random code generator are formed, wideband noise generator is the diffusion P district that is doped to an annular by noise diode in its N district of tube core PN junction, tube core substrate N district substrate N+ is provided with heat sink, or tube core P district is doped to the diffusion N district of an annular, tube core substrate P district substrate P
+Be provided with heat sink, noise diode series connection temperature compensation diode places in coaxial cavity or the waveguide cavity, adding constant current, instead to make the PN junction diode operation partially be the avalanche breakdown zone, produce random noise spectrum access sound table device SAW bandpass filter, microwave broadband amplifier band limit is amplified, its signal frequency cascade segmentation from low to high inserts corresponding n group random code generator respectively through coupling broadband network gradual transition transmission line, the coded signal input end of time-division code switch and n group random code generator output signal are joined, the counter data end, the monostalbe trigger output terminal docks with the code translator input, code translator output is joined with the code switch control end, is divided into n road multi-random code generator when constituting n group random code;
And n group random code generator is by n group sound table device SAW bandpass filter, voltage comparator, active integrator, trigger flip-flop is formed, sign indicating number frequency cascade segmentation from low to high inserts corresponding n group sound table device SAW bandpass filter band-limited noise spectrum, insert voltage comparator successively respectively, high speed voltage comparator, the hypervelocity voltage comparator, the clock signal fc of corresponding frequencies triggers sampling holder, the high-speed sampling retainer, the control end of hypervelocity sampling holder, voltage comparator output inserts sampling holder from low to high by frequency, the high-speed sampling retainer, the hypervelocity sampling holder, sampling holder output takes back its input end through active integrator feedback code element, and by trigger flip-flop output symbol P
1, P
2, P
nSupply with the radar phase modulation and transmit and receive relevant treatment;
The P that random code generator produces
1, P
2, P
nRandom code is when time division circuit coding generates n road pulse signal, and switch is received/sent out to time division circuit output pulse control radar, close when sending out receive, the time receiving closes the asynchronous control of sending out, echoed signal is chosen in the asynchronous storbing gate of time division circuit sequential.
The diffusion region that the technical program wideband noise generator noise diode PN junction is doped to an annular suppresses the generation of uncontrollable flicker noise, with its wideband noise generator signal band limit and amplification, noise spectrum cascade segmentation inserts n group random code generator, sign indicating number frequency and bandwidth, the separate generation of symbol width, time-division is encoded to sign indicating number and increases progressively arrangement frequently, the symbol width hyperchannel random code of arranging of successively decreasing offers the emission of radar phase modulation, correlation reception, measure a plurality of targets in the time of relative fast and do not have fuzzy distance, speed data, or the detection single target makes the near more resolving power of its distance high more, the accumulation of detection signal resolving power linear increment, improve the function of recognition objective details, and the randomness that keeps the ranging and range rate aperiodicity constantly to change, radar in the adjacent work of the same area does not disturb the coexistence operation mutually, time-division random code overcomes continuous wave radar emitted radiation energy leakage, and the problem that the obstruction echoed signal receives, asynchronous working is received/sent out to the time-division RANDOM SIGNAL RADAR, but the back realizes that along detecting dead zone-eliminating close-in target detects.
Description of drawings
Fig. 1 the utility model time division circuit
Fig. 2 multi-random code generator schematic diagram
Fig. 3 noise diode PN junction tube core structure synoptic diagram
Specific implementation method
With reference to Fig. 1,2, shown in 3, the utility model specific implementation method and embodiment, time division circuit is by counter 1, monostalbe trigger 2, code translator 3, code switch 4, the asynchronous storbing gate 5 of sequential constitutes, counter 1 clock end, monostalbe trigger 2 input termination clock signals, multi-random code generator is by wideband noise generator 9, sound table device SAW bandpass filter 6, microwave broadband amplifier 7 and n group random code generator 8 are formed, wideband noise generator 9 is the diffusion P districts that are doped to an annular by noise diode in its N district of tube core PN junction, tube core substrate N district substrate N
+Be provided with heat sinkly, or tube core P district is doped to the diffusion N district of an annular, tube core substrate P district substrate P
+Be provided with heat sink, noise diode series connection temperature compensation diode places in coaxial cavity or the waveguide cavity, adding constant current, instead to make the PN junction diode operation partially be the avalanche breakdown zone, produce random noise spectrum access sound table device SAW bandpass filter 6, microwave broadband amplifier 7 band limits are amplified, its signal frequency cascade segmentation from low to high inserts corresponding n group random code generator 8 respectively through coupling broadband network gradual transition transmission line, the coded signal input end of time-division code switch 4 and n group random code generator 8 output signals are joined, counter 1 data terminal, monostalbe trigger 2 output terminals dock with code translator 3 inputs, code translator 3 outputs are joined with code switch 4 control ends, are divided into n road multi-random code generator when constituting n group random code.
N organizes random code generator 8, and wherein the 8a group is by sound table device SAW bandpass filter 8
A1, voltage comparator 8
A2, sampling holder 8
A3, active integrator 8
A4, trigger flip-flop 8
A5Form, sign indicating number frequency cascade segmentation from low to high inserts corresponding n group sound table device SAW bandpass filter 8
A1, 8
B1, 8
N1The band-limited noise spectrum inserts voltage comparator 8 successively respectively
A2, high speed voltage comparator 8
B2, hypervelocity voltage comparator 8
N2, the clock signal f of corresponding frequencies
C21, f
C22, f
C2n Trigger sampling holder 8
A3, high-speed sampling retainer 8
B3, hypervelocity sampling holder 8
N3Control end, voltage comparator 8
A2, high speed voltage comparator 8
B2, hypervelocity voltage comparator 8
N2, output inserts sampling holder 8 frequently from low to high by sign indicating number
A3, high-speed sampling retainer 8
B3, hypervelocity sampling holder 8
N3, sampling holder 8
A3Output is through active integrator 8
A4The feedback code element takes back its input end, and by trigger flip-flop 8
A5Output symbol P
1High-speed sampling retainer 8
B3Output is through active integrator 8
B4The feedback code element takes back its input end, and by trigger flip-flop 8
B5Output symbol P
2 Hypervelocity sampling holder 8
N3Output is through active integrator 8
N4The feedback code element takes back its input end, and by trigger flip-flop 8
n 5Output symbol P
n, supply with the radar phase modulation and transmit and receive relevant treatment.
For the uncontrollable generating noise that suppresses to glimmer is doped to an annular diffusion P district in noise diode PN junction tube core N district, ring inner region σ area voltage breakdown is higher than the P district, the restriction breakdown region is located immediately at the P district, eliminate uncontrollable microplasma zone, interface and puncture, obtain PN junction and evenly puncture the uncontrollable generating noise of inhibition.Equally, also can be doped to an annular diffusion N district, ring inner region in the P district.Voltage breakdown is higher than the N district, and it is identical to suppress uncontrollable noise effects, and just the PN junction conducting direction is opposite.Tube core substrate N district substrate N
+Install heat sink or P district substrate P
+Install heat sinkly, reduce junction temperature and produce stable noise spectrum, it is even, smooth that its utmost point wide frequency ranges keeps, and bandwidth can reach several to the dozens of octave.
Constant current source reverse bias PN junction is operated in the avalanche breakdown zone, and stable charge carrier avalanche multiplication electrical current fluctuations produces Johnson noise at random, and amplitude-frequency is normal distribution.Because noise produces temperature influence code element positive-negative polarity probability, series connection temperature compensation diode reduces its influence.Two pipes and biasing circuit place in the shielding cavity, isolate the interference of external electromagnetic field, and the probability that positive negative level equates substantially, the random biphase code metasequence that pulse duty factor equates are substantially sampled, kept to sampling holder to it.
Random signal broadband sign indicating number increases progressively segmentation cascade periodic sampling frequently, symbol width independently produces, target range is by narrowing down linearly as far as nearly symbol width, the a plurality of roadblock targets or the single target that detect a plurality of tracks or water surface navigation channel in the time of relative fast detect accumulation data information in a plurality of passages, the near more resolving power of target range is high more, the 3-D view details is differentiated clear more, greatly improve crashworthiness, compare with continuous wave random code radar, under the prerequisite that keeps RANDOM SIGNAL RADAR high-performance electromagnetic compatibility EMC, detect a plurality of target capabilitiess of resolution and significantly improve, and, in the time of time-division n road random code pulse-phase modulation emission, close when taking to send out and receive, the time receiving closes and sends out, asynchronous back is detected along receiving, isolate emitted energy from the time and leak into receiving system, improve the detectability of Weak target signal, increase radar horizon, the back is blocked and is received echo and avoid blind range along detect eliminating the emission pulsewidth, improve dynamic range, realize automobile, the crashproof detection of ship, or detect other multiple goal.
Cascade fragment code in broadband produces the random biphase code signal frequently, and it is flexible and changeable, can adapt to time division multichannel and detect a plurality of targets and obtain the different distance resolving power, improves the ability of recognition objective.
Claims (3)
1, a kind of time division multi-random code generator for radar, it is characterized in that: time division circuit is by counter, monostalbe trigger, code translator, code switch, the asynchronous storbing gate of sequential constitutes, the counter clock end, monostalbe trigger input termination clock signal, multi-random code generator is by wideband noise generator, wideband noise generator, sound table device SAW bandpass filter, microwave broadband amplifier and n group random code generator are formed, wideband noise generator is the diffusion P district that is doped to an annular by noise diode in its N district of tube core PN junction, tube core substrate N district substrate N
+Be provided with heat sinkly, or tube core P district is doped to the diffusion N district of an annular, tube core substrate P district substrate P
+Be provided with heat sink, noise diode series connection temperature compensation diode places in coaxial cavity or the waveguide cavity, adding constant current, instead to make the PN junction diode operation partially be the avalanche breakdown zone, produce random noise spectrum access sound table device SAW bandpass filter, microwave broadband amplifier band limit is amplified, its signal frequency cascade segmentation from low to high inserts corresponding n group random code generator respectively through coupling broadband network gradual transition transmission line, the coded signal input end of time-division code switch and n group random code generator output signal are joined, the counter data end, the monostalbe trigger output terminal docks with the code translator input, code translator output is joined with the code switch control end, is divided into n road multi-random code generator when constituting n group random code.
2, radar multi-random code generator according to claim 1, it is characterized in that: n organizes random code generator, wherein organize bandpass filter by sound table device SAW, voltage comparator, sampling holder, active integrator, trigger flip-flop is formed, sign indicating number frequency cascade segmentation from low to high inserts corresponding n group sound table device SAW bandpass filter band-limited noise spectrum, insert voltage comparator successively respectively, high speed voltage comparator, the hypervelocity voltage comparator, the clock signal fc21 of corresponding frequencies, fc22, fc2n triggers sampling holder, the high-speed sampling retainer, the control end of hypervelocity sampling holder, voltage comparator, high speed voltage comparator, the hypervelocity voltage comparator, output inserts sampling holder frequently from low to high by sign indicating number, high-speed sampling retainer 8b3, the hypervelocity sampling holder, sampling holder output takes back its input end through active integral feedback code element, and by trigger flip-flop output symbol P1; The output of high-speed sampling retainer takes back its input end through active integrator feedback code element, and by trigger flip-flop output symbol P2; The output of hypervelocity sampling holder takes back its input end through active integrator feedback code element, and by trigger flip-flop output symbol Pn, supplies with the radar phase modulation and transmit and receive relevant treatment.
3, radar multi-random code generator according to claim 1, it is characterized in that: P1, the P2 that random code generator produces, Pn random code are when the time division circuit coding generates n road pulse signal, switch is received/sent out to time division circuit output pulse control radar, the asynchronous control that receive the pass when sending out, the time receiving pass is sent out, echoed signal is chosen in the asynchronous storbing gate of time division circuit sequential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201630821U CN201259542Y (en) | 2008-08-28 | 2008-08-28 | Time-division multi-element random code generator for radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201630821U CN201259542Y (en) | 2008-08-28 | 2008-08-28 | Time-division multi-element random code generator for radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201259542Y true CN201259542Y (en) | 2009-06-17 |
Family
ID=40773780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201630821U Expired - Fee Related CN201259542Y (en) | 2008-08-28 | 2008-08-28 | Time-division multi-element random code generator for radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201259542Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023370A (en) * | 2013-01-17 | 2013-04-03 | 中国科学院苏州纳米技术与纳米仿生研究所 | Random electric signal generator and random code generator |
| CN110034915A (en) * | 2019-04-19 | 2019-07-19 | 哈尔滨工业大学 | A kind of high-speed asynchronous serial data transmission method applied to array Ground Penetrating Radar |
| RU199488U1 (en) * | 2020-02-21 | 2020-09-03 | Общество с ограниченной ответственностью Фирма "Анкад" | Device for obtaining sequences of random binary numbers |
-
2008
- 2008-08-28 CN CNU2008201630821U patent/CN201259542Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023370A (en) * | 2013-01-17 | 2013-04-03 | 中国科学院苏州纳米技术与纳米仿生研究所 | Random electric signal generator and random code generator |
| CN103023370B (en) * | 2013-01-17 | 2015-06-17 | 中国科学院苏州纳米技术与纳米仿生研究所 | Random electric signal generator and random code generator |
| CN110034915A (en) * | 2019-04-19 | 2019-07-19 | 哈尔滨工业大学 | A kind of high-speed asynchronous serial data transmission method applied to array Ground Penetrating Radar |
| CN110034915B (en) * | 2019-04-19 | 2021-09-10 | 哈尔滨工业大学 | High-speed asynchronous serial data transmission method applied to array type ground penetrating radar |
| RU199488U1 (en) * | 2020-02-21 | 2020-09-03 | Общество с ограниченной ответственностью Фирма "Анкад" | Device for obtaining sequences of random binary numbers |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101661099B (en) | Time division multi-random code generator for radar | |
| Chen et al. | Band pass filter design against interrupted‐sampling repeater jamming based on time‐frequency analysis | |
| KR100906383B1 (en) | Narrow-band interference suppression method in uwb ranging systems | |
| CN101918857B (en) | Method for operating an electrical device or electrical devices | |
| Zhang et al. | Accurate UWB indoor localization system utilizing time difference of arrival approach | |
| KR100939276B1 (en) | UWB distance measurement system and driving method thereof | |
| CN201259542Y (en) | Time-division multi-element random code generator for radar | |
| Liu et al. | 9.3 A680 μW burst-chirp UWB radar transceiver for vital signs and occupancy sensing up to 15m distance | |
| CN105022033A (en) | Radar device and control method | |
| CN103064065A (en) | Waveform design for double-cycle pinch-off type pseudo-random code and signal processing method for echo | |
| Ma et al. | A novel through-wall imaging method using ultra wideband pulse system | |
| CN109932705A (en) | A kind of super-wide dynamic range return laser beam reception device and its control method | |
| CN101320995B (en) | Method and system for ultra-broadband ranging based on impulse | |
| Terada et al. | A CMOS impulse radio ultra-wideband transceiver for 1Mb/s data communications and/spl plusmn/2.5 cm range findings | |
| Harmuth | Radar equation for nonsinusoidal waves | |
| CN108055218B (en) | Leakage cable intrusion detection method based on frequency selective coding multi-carrier modulation | |
| Shirude et al. | Range estimation using direct sequence spread spectrum | |
| CN102223165B (en) | Communication masker and communication masking method | |
| Liu et al. | Anti-jamming property of Colpitts-based direct chaotic through-wall imaging radar | |
| JP2008249498A (en) | Radar system | |
| CN104777459A (en) | Radar anti-interference system | |
| Krishnan et al. | UWB-IR active reflector for high precision ranging and positioning applications | |
| Tu et al. | Pseudo‐random frequency hopping fuze technology based on signal reconstruction | |
| Shbat et al. | Signal processing in automotive controller area network based on radar sensors | |
| Ranganathan et al. | A survey of UWB technology within RFID systems and wireless sensor networks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090617 |