CN108923131A - 2 hair 4 of one kind receives 77GHz millimeter wave array antenna and its algorithm - Google Patents
2 hair 4 of one kind receives 77GHz millimeter wave array antenna and its algorithm Download PDFInfo
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- CN108923131A CN108923131A CN201810741815.3A CN201810741815A CN108923131A CN 108923131 A CN108923131 A CN 108923131A CN 201810741815 A CN201810741815 A CN 201810741815A CN 108923131 A CN108923131 A CN 108923131A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
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- Computer Networks & Wireless Communication (AREA)
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- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
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- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses 2 hairs 4 of one kind to receive 77GHz millimeter wave array antenna and its algorithm, its array antenna includes short distance transmitting antenna, distance transmission antenna, short distance reception antenna and distance reception antenna, it is characterized in that, the signal input part of the short distance transmitting antenna is connected with the signal output end of short distance transmitting branch, its algorithm includes, linear frequency modulation continuous wave signal is generated by waveform generator, and it is modulated to 77GHz mm wave RF frequency range, linearly frequency-modulated continuous-wave signals are radiated in space by waveform generator transmitting antenna, as the electromagnetic wave signal in spatial, when electromagnetic wave signal encounters object.The present invention uses planar microstrip array, transceiver, and two hairs four are received, and can carry out Two-dimensional FFT processing to Beat Signal, the precise measurement of the two-dimensional detection to target, target range and speed parameter may be implemented in the two dimensional image of available distance and speed.
Description
Technical field
The present invention relates to millimeter wave array antenna technique fields, more particularly to 2 hair 4 of one kind to receive 77GHz millimeter wave array day
Line and its algorithm.
Background technique
Millimetre-wave radar be widely used in ultrahigh speed short haul connection, long range interstellar communication, precision tracking, space at
The dynamical systems anticollision such as picture, trajectory measurement, missile guidance, automobile, ship, aircraft, unmanned plane, anti-terrorism safety check, millimeter wave medicine
The fields such as treatment.The development of the industry will promote China's military and civilian industrial expansion.Currently, both at home and abroad millimetre-wave radar with
24GHz (MRR brachymedial is apart from radar) and 77GHz (LRR long range radar) is mainstream.
Currently the actual conditions in China are：24GHz millimetre-wave radar is still mainstream.This enters millimeter wave thunder with China
Later up to industry, 77GHz product technology is difficult to break through.The core technology of 77Ghz millimetre-wave radar rest in Bosch, Delphi,
In the multinational giants such as Autoliv, continent hand, product is not sold to China individually, and only to provide a full set of system, price is suitable
It is expensive.Moreover, the 77GHz product of latest generation will not be equipped in whole system.Even the 77Ghz milli used on imported auto
Metre wave radar, and the product of external early earlier generations, and as 77Ghz millimetre-wave radar essential core part -- 77GHz millimeters
Wave array antenna and its algorithm are still a difficult problem for stopping the development of China 77Ghz millimetre-wave radar.
Summary of the invention
Technical problems based on background technology, the invention proposes 2 hairs 4 of one kind to receive 77GHz millimeter wave array antenna
And its algorithm.
A kind of 2 hair, 4 receipts 77GHz millimeter wave array antenna and its algorithm proposed by the present invention, including short distance transmitting antenna,
Distance transmission antenna, short distance reception antenna and distance reception antenna, the signal input part of the short distance transmitting antenna
It is connected with the signal output end of short distance transmitting branch, and the signal input part of distance transmission antenna is connected with distance transmission
The signal output end of branch, the short distance transmitting branch and distance transmission tributary signal input terminal are connected with the same waveform
The signal output end of generator, the signal input part of the short distance reception antenna are connected with short distance reception branch, and long distance
It is connected with distance reception branch from receiving antenna signal input part, the short distance reception branch and distance reception branch are equal
It is connected with AD signal amplifier, and two AD signal amplifiers are connected with the same DSP processing unit, the DSP processing unit
It is connected with switch, switch is electrically connected with waveform generator.
The present invention also proposes that 2 hair 4 of one kind receives the algorithm of 77GHz millimeter wave array antenna, includes the following steps：
S1：Linear frequency modulation continuous wave signal is generated by waveform generator, and is modulated to 77GHz mm wave RF frequency
Section；
S2：Linearly frequency-modulated continuous-wave signals are radiated in space by waveform generator transmitting antenna, are become
The electromagnetic wave signal of spatial, when electromagnetic wave signal encounters object, portion of energy reflects, and is received antenna reception,
As reception signal and it is output to DSP processing unit；
S3：DSP processing unit will receive signal with emit after signal is mixed, filtered, obtain Beat Signal；
S4：Two-dimensional FFT processing, the two dimensional image of available distance and speed, by using perseverance are carried out to Beat Signal
False-alarm detection algorithm may be implemented to the two-dimensional detection and target range of target and the precise measurement of speed parameter.
Preferably, the transmitting signal f that waveform generator exports in the S1t(t) mathematic(al) representation is：Wherein A0For the peak amplitude for emitting signal.f0For carrier frequency, i.e. 77GHz.
For chirp rate, B is modulating bandwidth, and T is the FM signal duration, and D=BT is the Timed automata of linear FM signal,
For the initial phase of signal.
Preferably, signal f is received in the S2r(t) mathematic(al) representation is：
Wherein, KrBe at a distance from target reflection factor, with target, the factors such as reflection cross section it is related, τ (t) is electromagnetic wave in day
Carry out the time of transmission back between line and target, mathematic(al) representation is：Wherein, R0For antenna and target it
Between initial distance, v be target and antenna relative velocity, c is the light velocity.
Preferably, the mathematic(al) representation of Beat Signal is in the S3
And substitute into τ (t) in S4, the mathematic(al) representation for obtaining Beat Signal is：
It follows that Beat Signal is linear FM signal：
Wherein fdFor signal carrier frequency, μdFor chirp rate,For initial phase, mathematic(al) representation is respectively：
In view of the light velocity is very big, above-mentioned mathematic(al) representation can be reduced to：
Beneficial effects of the present invention are：The present invention uses planar microstrip array, transceiver, and two hairs four are received, width wave beam
Coplanar integrated design, can to Beat Signal carry out Two-dimensional FFT processing, the two dimensional image of available distance and speed, and
By using CFAR detection algorithm, the precise measurement of the two-dimensional detection to target, target range and speed parameter may be implemented.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of 2 hair 4 proposed by the present invention receives 77GHz millimeter wave array antenna；
Fig. 2 is that a kind of 2 hair 4 proposed by the present invention receives two of distance and speed in the algorithms of 77GHz millimeter wave array antennas
Tie up image.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1,2 hair 4 of one kind receives 77GHz millimeter wave array antenna, including short distance transmitting antenna, distance transmission day
Line, short distance reception antenna and distance reception antenna, the signal input part of the short distance transmitting antenna are connected with closely
The signal output end of transmitting branch, and the signal input part of distance transmission antenna be connected with distance transmission branch signal it is defeated
Outlet, the short distance transmitting branch and distance transmission tributary signal input terminal are connected with the signal of the same waveform generator
Output end, the signal input part of the short distance reception antenna is connected with short distance reception branch, and distance reception antenna is believed
Number input terminal is connected with distance reception branch, and the short distance reception branch and distance reception branch are respectively connected with AD signal
Amplifier, and two AD signal amplifiers are connected with the same DSP processing unit, the DSP processing unit is connected with switch, opens
It closes and is electrically connected with waveform generator.
Referring to Fig. 2, a kind of 2 hair 4 receives the algorithm of 77GHz millimeter wave array antenna, includes the following steps：
S1：Linear frequency modulation continuous wave signal is generated by waveform generator, and is modulated to 77GHz mm wave RF frequency
Section；
S2：Linearly frequency-modulated continuous-wave signals are radiated in space by waveform generator transmitting antenna, are become
The electromagnetic wave signal of spatial, when electromagnetic wave signal encounters object, portion of energy reflects, and is received antenna reception,
As reception signal and it is output to DSP processing unit；
S3：DSP processing unit will receive signal with emit after signal is mixed, filtered, obtain Beat Signal；
S4：Two-dimensional FFT processing, the two dimensional image of available distance and speed, by using perseverance are carried out to Beat Signal
False-alarm detection algorithm may be implemented to the two-dimensional detection and target range of target and the precise measurement of speed parameter.
In the present invention, the transmitting signal f of waveform generator output in S1t(t) mathematic(al) representation is：
Wherein A0For the peak amplitude for emitting signal.f0For carrier frequency, i.e. 77GHz.For chirp rate, B is modulating bandwidth, T
For the FM signal duration, D=BT is the Timed automata of linear FM signal,For the initial phase of signal.
Signal f is received in the S2r(t) mathematic(al) representation is：
Wherein, KrBe at a distance from target reflection factor, with target, the factors such as reflection cross section it is related, τ (t) is electromagnetic wave in day
Carry out the time of transmission back between line and target, mathematic(al) representation is：Wherein, R0For antenna and target it
Between initial distance, v be target and antenna relative velocity, c is the light velocity.
The mathematic(al) representation of Beat Signal is in S3：
And substitute into τ (t) in S4, the mathematic(al) representation for obtaining Beat Signal is：
It follows that Beat Signal is linear FM signal：
Wherein fdFor signal carrier frequency, μdFor chirp rate,For initial phase, mathematic(al) representation is respectively：
In view of the light velocity is very big, above-mentioned mathematic(al) representation can be reduced to：
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. 2 hair 4 of one kind receives 77GHz millimeter wave array antenna, including short distance transmitting antenna, distance transmission antenna, short distance
Receiving antenna and distance reception antenna, which is characterized in that the signal input part of the short distance transmitting antenna is connected with low coverage
Signal output end from transmitting branch, and the signal input part of distance transmission antenna is connected with the signal of distance transmission branch
Output end, the short distance transmitting branch and distance transmission tributary signal input terminal are connected with the letter of the same waveform generator
Number output end, the signal input part of the short distance reception antenna are connected with short distance reception branch, and distance reception antenna
Signal input part is connected with distance reception branch, and the short distance reception branch and distance reception branch are respectively connected with AD letter
Number amplifier, and two AD signal amplifiers are connected with the same DSP processing unit, the DSP processing unit is connected with switch,
Switch is electrically connected with waveform generator.
2. the algorithm that 2 hair 4 of one kind receives 77GHz millimeter wave array antenna, which is characterized in that include the following steps：
S1：Linear frequency modulation continuous wave signal is generated by waveform generator, and is modulated to 77GHz mm wave RF frequency range；
S2：Linearly frequency-modulated continuous-wave signals are radiated in space by waveform generator transmitting antenna, are become in space
The electromagnetic wave signal of propagation, when electromagnetic wave signal encounters object, portion of energy reflects, and is received antenna reception, becomes
It receives signal and is output to DSP processing unit；
S3：DSP processing unit will receive signal with emit after signal is mixed, filtered, obtain Beat Signal；
S4：Two-dimensional FFT processing, the two dimensional image of available distance and speed, by using constant false alarm are carried out to Beat Signal
Detection algorithm may be implemented to the two-dimensional detection and target range of target and the precise measurement of speed parameter.
3. the algorithm that a kind of 2 hair 4 according to claim 2 receives 77GHz millimeter wave array antenna, which is characterized in that described
The transmitting signal f that waveform generator exports in S1t(t) mathematic(al) representation is：
Wherein A0For the peak amplitude for emitting signal.f0For carrier frequency, i.e. 77GHz.For chirp rate, B is modulating bandwidth, and T is to adjust
Frequency signal duration, D=BT are the Timed automata of linear FM signal,For the initial phase of signal.
4. the algorithm that a kind of 2 hair 4 according to claim 2 receives 77GHz millimeter wave array antenna, which is characterized in that described
Signal f is received in S2r(t) mathematic(al) representation is：Its
In, KrBe at a distance from target reflection factor, with target, the factors such as reflection cross section it is related, τ (t) is electromagnetic wave in antenna and mesh
Carry out the time of transmission back between mark, mathematic(al) representation is：Wherein, R0It is first between antenna and target
Beginning distance, v are the relative velocity of target and antenna, and c is the light velocity.
5. the algorithm that a kind of 2 hair 4 according to claim 2 receives 77GHz millimeter wave array antenna, which is characterized in that described
The mathematic(al) representation of Beat Signal is in S3And by τ in S4
(t) it substitutes into, the mathematic(al) representation for obtaining Beat Signal is：
It follows that Beat Signal is linear FM signal：
Wherein fdFor signal carrier frequency, μdFor chirp rate,For initial phase, mathematic(al) representation is respectively：
In view of the light velocity is very big, above-mentioned mathematic(al) representation can be reduced to：
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649801A (en) * | 2020-12-10 | 2021-04-13 | 北京工业大学 | Millimeter wave multi-antenna distance measuring system |
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| CN112649801A (en) * | 2020-12-10 | 2021-04-13 | 北京工业大学 | Millimeter wave multi-antenna distance measuring system |
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Application publication date: 20181130 |