CN103278811A - Ultra wide band microwave photon long-distance range radar device based on chaos laser - Google Patents
Ultra wide band microwave photon long-distance range radar device based on chaos laser Download PDFInfo
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Abstract
The invention discloses an ultra wide band microwave photon long-distance range radar device based on chaos laser. The ultra wide band microwave photon long-distance range radar device based on chaos laser is characterized in that an ultra wide band chaos signal is used as a radar detection signal; the radar detection signal is transmitted via a long single mode fiber, is converted into a corresponding electric signal at a long-distance antenna terminal and is transmitted via an ultra wide band antenna; a detection signal is received by the ultra wide band antenna of the same model after being reflected when meeting a space target part; the laser is subjected to linear modulation, the signal is converted into a corresponding optical signal and is then transmitted via the single mode fiber to return to a center station; data processing is carried out in the data processing center to obtain and display target distance information; and therefore, the space precise positioning of the long-distance target is realized. The ultra wide band microwave photon long-distance range radar device based on the chaos laser is used for monitoring the military radar, the radar system on the mountain top and the island with severe environment and the industrial areas with severe or dangerous environment in real time.
Description
Technical field
The present invention relates to the long-range range finding of a kind of radar, remote sensing and real time monitoring apparatus, especially a kind of radar installations that utilizes the ultra wide band chaotic signal to realize long-range accurate location and remote sensing.
Technical background
Since the World War II, radar is being brought into play more and more important effect in Aeronautics and Astronautics, communications and transportation, weather forecast, geodetic surveying and military affairs.Radar in modern battlefield and ruins, disaster area, has very important effect as the important means that obtains spatial information.And at civil area, also there is good application prospects in fields such as environmental monitoring, medical monitoring, trailer-mounted radar, Smart Home and hi-Fix.
In Radar Design, the Waveform Design of radar is one of important content of radar overall design.The waveform of radar has determined the generation design of radar system, signal and optimum receiving signal disposal route etc.If what radar adopted is the lower determinacy radar waveform of complexity, just very easily intercepted and captured by the enemy, and adopt complexity ultrabroad band random waveform high, that have " drawing pin type " ambiguity function, just can obtain extremely low by intercept probability and extremely strong interference free performance.Chaos is the class phenomenon at random that produces in the deterministic nonlinear dynamic system, it has long-term unpredictability, to the susceptibility of initial value, have special nature such as strange attractor, shape and noise are the spitting image of seemingly, it has reflected the intrinsic stochasticity of nonlinear system, presents extremely strong interference free performance.And chaotic signal is noise-like signal, than the random noise radar, chaotic signal determinacy in itself, make the generation of chaotic radar waveform simple in structure, statistical property and track control easily, has bigger advantage than direct employing random signal such as noise signal in actual use.So also shown great attention to by each scientific research institution in the world about the research of chaos wireless communication system and RANDOM SIGNAL RADAR device aspect, chaos source.
2007, the new group of Ran Li has proposed a kind of chaotic signal and synchronous (S. Qiao of ULTRA-WIDEBAND RADAR system of chaos of utilizing, Z. G. Shi, K. S. Chen, W. Z. Cui W. Ma, T. Jiang and L. X. Ran, " A new architecture of UWB radar utilizing microwave chaotic signals and chaos synchronization ", Progress In Electromagnetics Research, PIER 75,225 – 237,2007. and Z. G. Shi, S. Qiao, K. S. Chen, W. Z. Cui, W. Ma, T. Jiang and L. X. Ran, " Ambiguity functions of direct chaotic radar employing microwave chaotic chaotic Colpitts oscillator ", Progress In Electromagnetics Research, PIER 77,1 – 14,2007.).The chaotic signal that the microwave chaotic oscillator is produced is realized the recovery of target echo synchronously directly as the signal of radar by chaos.The simulation result of system shows that the basic frequency of the signal that this chaotic radar system produces has reached 1.6GHz, and there is good interference free performance in this system: be lower than in signal to noise ratio (S/N ratio)-situation of 20dB under, system still can operate as normal.But, if directly produce and the modulating UWB microwave signal in electric territory, no matter be traditional technology or the method for the chaotic signal that produces with the microwave chaotic oscillator, all be faced with same problem: be subject to electronic bottleneck, can't be directly produce and modulate more high frequency band (millimeter wave or nearly millimere-wave band), the ultra-wideband microwave signal of high bandwidth more in electric territory.And utilize correlation method to realize that the resolution of the chaos ultra-broadband ranging radar of range finding is decided by the bandwidth of ultra-broadband signal, therefore the ultra-broadband signal that produces in electric territory will limit the spatial resolution of range radar system greatly.
Chaotic laser light is that laser instrument is exported instable a kind of special shape, the output (light intensity or wavelength, position phase) that refers to laser instrument no longer is stable state on time domain, but the random variation of noise like, this moment, the dynamic perfromance of laser instrument can be described by the rate equation of determining equally, but exported random variation because the extreme susceptibility to starting condition makes.Laser instrument can produce bandwidth greater than the chaos ultra-broadband signal of 10GHz, can solve the bottleneck that the high bandwidth chaotic signal produces in electric territory fully.Realize the chaos laser range-measurement radar based on chaotic laser light, have that low probability of intercept, antijamming capability are strong, high precision and with plurality of advantages (Wang Yuncai such as range-independence, the basis of chaotic laser light and applied research, the 4th western Shi Er province (district) city physical society associating seminar collection of thesis, 2008 and Wang Yuncai, the generation of chaotic laser light and application, laser and optoelectronics progress, 2009).Professor Liu Jiaming of University of California in Los Angeles in 2004 has proposed a kind of radar system based on chaotic laser light, chaotic laser light is converted to the chaos electric signal of 1.5GHz bandwidth, constitute the chaos microwave radar, proved the advantage based on the ULTRA-WIDEBAND RADAR of chaotic laser light: high range resolution, there is not fuzzy range finding, safety detection, low probability of intercept and high Electro Magnetic Compatibility.And in experiment, obtained range resolution (the F Y Lin and J M Liu of 9cm, Chaotic radar using nonlinear laser dynamics, IEEE J. of Quantum Electron. Vol.40, no.6,815-820,2004).
Though the super wideband wireless electric signal has many advantages, but, the broadband detectable signal comes loss big with traditional concentric cable and waveguide circuit, operating distance is short, radar antenna and control center's distance are limited only to be several meters to tens of meters, makes wideband radar all be restricted in use in the military and civilian field.In the military affairs, well-known radar antenna is a radiation source, also is the target that the enemy attacks.The distance of antenna and control center is leaned on too closely, in case antenna suffers aircraft or missile attack, certainly will bring disaster to control center, destroys whole radar, and jeopardizes commander and operating personnel's safety.In addition, for the radar system that is erected at environment mal-condition such as snow mountain top, island, operating personnel must operate in rugged environment and plant maintenance.And industrially also there is a same problem: such as, in the dark coal store big at dust, that environment is abominable, the tellurometer survey radar can't be realized long-range control, material level is carried out real-time monitoring, plant maintenance also must solve in abominable site environment the measurement of material level in the coal bunker.Therefore the long-range technical research of radar antenna is one and has great military value and the problem of practical value.In order to widen the effective coverage range of ultra-broadband signal, the researcher has proposed light and has carried the super wideband wireless power technology, with optical fiber as a kind of low loss dielectric, signal passes through Optical Fiber Transmission, low-loss arrives user base station, changes electric signal into by photodetector and transmits and receives signal by ultra-wideband antenna.So just can improve the wireless space of ultra-wideband microwave EFFECTIVE RANGE greatly.1998, document (J. E. Rom ' an, L. T. Nichols, K. J. Williams, R. D. Esman, Senior Member, IEEE, G. C. Tavik, M. Livingston, and M. G. Parent, Fiber-Optic Remoting of an Ultrahigh Dynamic Range Radar, IEEE Transactions on Microwave Theory and Techniques, VOL.46, NO.12,1998) propose and tested the X-band radar of optical fiber remote control first, realized that very high dynamic range is arranged, the Long-distance Control radar that satisfies Long-distance Control radar low phase noise requirement at that time that can be strict.
The present invention utilizes and produces work (the Ming-Jiang Zhang of ultra-broadband signal early stage, Tie-Gen Liu, An-Bang Wang, Jian-Yu Zheng, Li-Na Meng, Zhao-Xia Zhang, and Yun-Cai Wang, Photonic ultrawideband signal generator using an optically injected chaotic semiconductor laser, Optics Letters, Vol.36, No.6,2011), in conjunction with photoproduction chaos ultra-broadband signal, light carries super wideband wireless power technology and relevant ranging technology, further propose a kind of long-range range radar device based on chaotic laser light, can be used for military radar, the mountain top that environment is abominable, real-time monitoring in the abominable or dangerous area of environment etc. in the radar system on island and the industry.
Summary of the invention
The object of the present invention is to provide the long-range range radar device of a kind of ultra-wideband microwave photon based on chaotic laser light, it is short to solve present RANDOM SIGNAL RADAR operating distance, the problem that resolution is low.
For distance accuracy and the long-range ultra-broadband ranging radar of realization that further improves radar system, the measure that the present invention takes is a kind of ultra-wideband microwave photon radar installations based on chaotic laser light, comprise central station, Transmission Fibers and remote antenna end, it is characterized in that:
The detectable signal that produces at central station arrives the remote antenna end through the first single-mode fiber long-distance transmissions, and emission detection signal and receiving target reflected signal noise spectra of semiconductor lasers linear modulation are transformed into corresponding light signal; Light signal is got back to central station through the second single-mode fiber long-distance transmissions and is carried out the data processing;
Described central station is to produce chaotic laser light by the ultra wide band chaotic lasing light emitter to be divided into detection light and reference light by fiber coupler; Survey light through first single-mode fiber to the remote antenna end; Reference light transmits through the 3rd single-mode fiber, utilizes the 3rd photodetector to be transformed into corresponding electric signal and also shows as the range information that cross correlation process obtains target in data processing centre (DPC) with the detectable signal that utilizes second photodetector to be transformed into corresponding electric signal;
Described remote antenna end is by the detection of optical power size of light adjustable attenuator control through the transmission of first single-mode fiber, after utilize first photodetector to be transformed into corresponding electric signal, after this electric signal is amplified by first low noise amplifier by the ultra broadband transmission antennas transmit; Amplified the output of back linear modulation laser instrument behind the ultra broadband receiving antenna receiving target thing part reflected signal by second low noise amplifier, and be transformed into corresponding light signal, get back to central station through the transmission of second single-mode fiber again after the optical signals image intensifer amplifies and carry out the data processing.
In the technique scheme, further, its additional technical characterictic is as follows again:
The length of first single-mode fiber is less than or equal to the length of second single-mode fiber.
The 3rd single-mode fiber is compensated optical fiber, and its length is the length sum of first single-mode fiber and second single-mode fiber.
By the parameter of suitable adjusting ultra wide band chaotic lasing light emitter, producing bandwidth is the chaotic laser light of 18 GHz.
The bandwidth of first photodetector, first low noise amplifier, ultra broadband emitting antenna, ultra broadband receiving antenna, second low noise amplifier, second photodetector, the 3rd photodetector is more than or equal to 18 GHz, and the acquisition bandwidth at data acquisition process center is also more than or equal to 18 GHz.
Realize that the present invention utilizes work (the Ming-Jiang Zhang that produces ultra-broadband signal in earlier stage, Tie-Gen Liu, An-Bang Wang, Jian-Yu Zheng, Li-Na Meng, Zhao-Xia Zhang, and Yun-Cai Wang, Photonic ultrawideband signal generator using an optically injected chaotic semiconductor laser, Optics Letters, Vol.36, No.6,2011), in conjunction with photoproduction chaos ultra-broadband signal, light carries super wideband wireless power technology and relevant ranging technology, the long-range range radar device of a kind of ultra-wideband microwave photon based on chaotic laser light has been proposed, utilize the light feedback to add light beam and go into semiconductor laser generation ultra wide band chaotic laser through reaching the optical fiber remote transmission arrival remote antenna transmitter unit of 100km, realize the millimere-wave band high frequency band of centre frequency and bandwidth flexible and controllable, generation and the emission of high bandwidth ultra wide band chaotic signal, and pass through in conjunction with ultra-wideband microwave signal transmitting and receiving technology and chaos auto-correlation ranging technology, system space resolution can reach 1mm, final realization is used for long-range range finding, the long-range range radar device of chaos ultra-wideband microwave photon in fields such as remote sensing and monitoring in real time.Can be used for military radar, real-time monitoring in the abominable or dangerous area of environment etc. in the radar system on the abominable mountain top of environment, island and the industry.
Apparatus of the present invention combine photoproduction chaos ultra-broadband signal technology, light carries super wideband wireless power technology and relevant ranging technology, finally realized being used for long-range range finding, the long-range range radar device of chaos ultra-wideband microwave photon in fields such as remote sensing and monitoring in real time.Compare with existing other RANDOM SIGNAL RADAR device and also to have following advantage and good effect:
One be based on ultra-broadband signal that chaotic laser light produces have low in energy consumption, power spectrum is smooth, the advantage of bandwidth, can realize high range resolution, and antijamming capability is strong;
The 2nd, utilize the light feedback to add light beam and go into semiconductor laser, by to laser instrument and the adjusting of injecting light, feedback light, realize the spectral characteristic flexible and controllable of UWB microwave signal in the light territory, thereby produce tunable, the adjustable ultra wide band chaotic microwave signal of signal spectrum bandwidth of centre frequency, make this device can be towards different field of detecting.
The 3rd, combine photoproduction chaos ultra-broadband signal technology, light carries super wideband wireless power technology and relevant ranging technology, long-distance transmissions through this common low loss dielectric of single-mode fiber, finally realized being used for long-range range finding, the long-range range radar device of chaos ultra-wideband microwave photon in fields such as remote sensing and monitoring in real time.
Description of drawings
Fig. 1 is based on the structural representation of the long-range range radar device of ultra-wideband microwave photon of chaotic laser light.
Among the figure: 1: the ultra wide band chaotic lasing light emitter; 2: fiber coupler; 3: the first single-mode fibers; 4: the light adjustable attenuator; 5: the first photodetectors; 6: the first low noise amplifiers; 7: the ultra broadband emitting antenna; 8: the ultra broadband receiving antenna; 9: the second low noise amplifiers; 10: semiconductor laser; 11: image intensifer; 12: the second single-mode fibers; 13: the second photodetectors; 14: the three photodetectors; 15: the three single-mode fibers; 16: the data acquisition process center; 17: object.
Embodiment
For the embodiment of better explanation a kind of long-range range radar device of ultra-wideband microwave photon based on chaotic laser light provided by the present invention, make further instruction below in conjunction with accompanying drawing 1.
Implement the long-range range radar device of a kind of ultra-wideband microwave photon based on chaotic laser light provided by the present invention, comprise central station I, Transmission Fibers and remote antenna end II.Wherein, described central station I comprises ultra wide band chaotic lasing light emitter 1, fiber coupler 2, the 3rd single-mode fiber 15, the 3rd photodetector 14, second photodetector 13 and data processing centre (DPC) 16; Described Transmission Fibers comprises first single-mode fiber 3 and second single-mode fiber 12; Described remote antenna end II comprises light adjustable attenuator 4, first photodetector 5, first low noise amplifier 6, ultra broadband emitting antenna 7, ultra broadband receiving antenna 8, second low noise amplifier 9, semiconductor laser 10 and image intensifer 11.
At first, utilize the ultra wide band chaotic signal of ultra wide band chaotic lasing light emitter 1 generation as the detectable signal of radar, be divided into detectable signal and reference signal by fiber coupler 2; The detectable signal of handling through any dispersion compensation does not transmit through first single-mode fiber 3, arrives remote antenna end II.Control the intensity of light signal in remote antenna end II by regulating light adjustable attenuator 4, light signal changes corresponding electric signal into through first photodetector 5, is launched by ultra-wideband antenna 7 after first low noise amplifier 6 amplifies.Detectable signal runs into extraterrestrial target thing 17 rear sections and reflects, reflected signal is received by the ultra broadband receiving antenna 8 of same model, amplify through second low noise amplifier 9, the output waveform of this signal noise spectra of semiconductor lasers 10 is carried out linear modulation, is transformed into corresponding light signal again.This optical signals image intensifer 11 amplifies by 12 transmission of second single-mode fiber, get back to the central station I, be transformed into electric signal through second photodetector 13 back light signals and carry out cross-correlation calculation with the reference signal that changes corresponding electric signal through the 3rd single-mode fiber 15 and the 3rd photodetector 14 in data processing centre (DPC) 16, obtain the range information of remote object, and show.
Wherein, adopt the length of first single-mode fiber 3 smaller or equal to the length of second single-mode fiber 12, the 3rd single-mode fiber 15 is compensated optical fiber, and its length is the length sum of first single-mode fiber 3 and second single-mode fiber 12.Regulate by suitable light source parameters, can produce bandwidth up to the smooth chaotic laser light of the power spectrum of 18GHz.The bandwidth of first photodetector 5, first low noise amplifier 6, ultra broadband emitting antenna 7, ultra broadband receiving antenna 8, second low noise amplifier 9, second photodetector 13, the 3rd photodetector 14 is more than or equal to 18 GHz, and the acquisition bandwidth at data acquisition process center 16 is also more than or equal to 18 GHz.
The chaotic laser light source 1 of the invention described above device is to utilize the light feedback to add light beam to go into the ultra wide band chaotic source that semiconductor laser produces, regulate by suitable light source parameters, can produce bandwidth up to the smooth ultra-broadband signal of the power spectrum of 18GHz, handle without any dispersion compensation, realize long-range range finding through the Optical Fiber Transmission that reaches 100km, can reach the spatial resolution of 1mm; And, the present invention can produce that centre frequency is tunable, the adjustable ultra wide band chaotic microwave signal of signal spectrum bandwidth, make this device can be towards long-range range finding, different field such as remote sensing and monitoring in real time, be mainly used in military radar, real-time monitoring in the abominable or dangerous area of environment etc. in the radar system on the abominable mountain top of environment, island and the industry.
Claims (5)
1. the long-range range radar device of the ultra-wideband microwave photon based on chaotic laser light comprises central station I, Transmission Fibers and remote antenna end II, it is characterized in that:
The detectable signal that produces in the central station I arrives remote antenna end II emission detection signal through first single-mode fiber (3) long-distance transmissions, remote antenna end II receiving target reflected signal is transformed into corresponding light signal by noise spectra of semiconductor lasers (10) linear modulation; Light signal is got back to the central station I through second single-mode fiber (12) long-distance transmissions and is carried out the data processing;
Described central station I is to produce chaotic laser light by ultra wide band chaotic lasing light emitter (1) to be divided into detection light and reference light by fiber coupler (2); Survey light and arrive remote antenna end II through first single-mode fiber (3); Reference light utilizes the 3rd photodetector (14) to be transformed into corresponding electric signal and also shows as the range information that cross correlation process obtains target in data processing centre (DPC) (16) with the detectable signal that utilizes second photodetector (13) to be transformed into corresponding electric signal through the 3rd single-mode fiber (15) transmission;
Described remote antenna end II is by the detection of optical power size of light adjustable attenuator (4) control through first single-mode fiber (3) transmission, after utilize first photodetector (5) to be transformed into corresponding electric signal, this electric signal is launched by ultra broadband emitting antenna (7) after being amplified by first low noise amplifier (6); Amplified the output of back linear modulation laser instrument (10) behind ultra broadband receiving antenna (8) receiving target thing (17) the part reflected signal by second low noise amplifier (9), and be transformed into corresponding light signal, get back to the central station I through second single-mode fiber (12) transmission again after this optical signals image intensifer (11) amplifies and carry out the data processing.
2. the long-range range radar device of a kind of ultra-wideband microwave photon based on chaotic laser light as claimed in claim 1, it is characterized in that: the length of first single-mode fiber (3) is less than or equal to the length of second single-mode fiber (12).
3. the long-range range radar device of a kind of ultra-wideband microwave photon based on chaotic laser light as claimed in claim 1 or 2, it is characterized in that: the 3rd single-mode fiber (15) is compensated optical fiber, and its length is the length of first single-mode fiber (3) and the length sum of second single-mode fiber (12).
4. the long-range range radar device of a kind of ultra-wideband microwave photon based on chaotic laser light as claimed in claim 1 is characterized in that: the parameter of suitable adjusting ultra wide band chaotic lasing light emitter (1), producing bandwidth is the chaotic laser light of 18 GHz.
5. the long-range range radar device of a kind of ultra-wideband microwave photon based on chaotic laser light as claimed in claim 1, it is characterized in that: the bandwidth of first photodetector (5), first low noise amplifier (6), ultra broadband emitting antenna (7), ultra broadband receiving antenna (8), second low noise amplifier (9), second photodetector (13), the 3rd photodetector (14) is greater than 18 GHz, and the acquisition bandwidth of data acquisition process center (16) is also greater than 18 GHz.
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| CN104618013A (en) * | 2015-01-26 | 2015-05-13 | 电子科技大学 | Associated optical time domain reflectometer based on all-fiber wide-spectrum chaotic light source |
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| CN106230516A (en) * | 2016-08-31 | 2016-12-14 | 上海交通大学 | Radar communication based on microwave photon antagonism integral system |
| CN106226762A (en) * | 2016-09-29 | 2016-12-14 | 武汉大学 | A kind of method for determining high frequency sky ground wave OTHR search coverage spatial distribution |
| CN108549074A (en) * | 2018-04-08 | 2018-09-18 | 太原理工大学 | A kind of broadband chaotic radar device based on optical analog correlation receiver |
| CN108845296A (en) * | 2018-06-15 | 2018-11-20 | 中国电子科技集团公司第十四研究所 | A kind of wideband radar radio frequency digital receiver and Signal acquiring and processing method based on microwave photon |
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| CN104618013A (en) * | 2015-01-26 | 2015-05-13 | 电子科技大学 | Associated optical time domain reflectometer based on all-fiber wide-spectrum chaotic light source |
| CN104749579A (en) * | 2015-04-02 | 2015-07-01 | 太原理工大学 | Channel depth measuring method based on chaotic laser device and correlative method thereof |
| CN106230516A (en) * | 2016-08-31 | 2016-12-14 | 上海交通大学 | Radar communication based on microwave photon antagonism integral system |
| CN106230516B (en) * | 2016-08-31 | 2018-09-14 | 上海交通大学 | Radar communication based on microwave photon fights integral system |
| CN106226762A (en) * | 2016-09-29 | 2016-12-14 | 武汉大学 | A kind of method for determining high frequency sky ground wave OTHR search coverage spatial distribution |
| CN108549074B (en) * | 2018-04-08 | 2021-07-02 | 太原理工大学 | Broadband chaotic radar device based on optical simulation correlation receiver |
| CN108549074A (en) * | 2018-04-08 | 2018-09-18 | 太原理工大学 | A kind of broadband chaotic radar device based on optical analog correlation receiver |
| CN108845296A (en) * | 2018-06-15 | 2018-11-20 | 中国电子科技集团公司第十四研究所 | A kind of wideband radar radio frequency digital receiver and Signal acquiring and processing method based on microwave photon |
| CN108845296B (en) * | 2018-06-15 | 2022-07-22 | 中国电子科技集团公司第十四研究所 | Broadband radar radio frequency digital receiver based on microwave photons and signal acquisition and processing method |
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