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CN105022033B - Radar installations and control method - Google Patents

Radar installations and control method Download PDF

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Publication number
CN105022033B
CN105022033B CN201510363060.4A CN201510363060A CN105022033B CN 105022033 B CN105022033 B CN 105022033B CN 201510363060 A CN201510363060 A CN 201510363060A CN 105022033 B CN105022033 B CN 105022033B
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China
Prior art keywords
signal
radar installations
controller
emitter
echo
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Expired - Fee Related
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CN201510363060.4A
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Chinese (zh)
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CN105022033A (en
Inventor
李广柱
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Individual
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/023Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The present invention relates to a kind of radar installations and control method, the device includes controller, emitter, transmitting antenna and receiver, in addition to controllable attenuator, and the first signal input part of controllable attenuator and the signal output part of emitter connect;The secondary signal input of controllable attenuator and the secondary signal output end of controller connect;The signal output part of controllable attenuator and the signal input part of transmitting antenna connect;The signal output part of receiver and the signal input part of controller connect;Emitter produces detectable signal and transmitted to controllable attenuator;Controllable attenuator adjusts the power to detectable signal transmitted by transmitting antenna according to the control signal of controller;The echo-signal that controller receives according to receiver determines interference signal, and the detectable signal of emitter is adjusted according to interference signal.The present invention can prevent from interfering between radar installations in the same area, improve detection performance.

Description

Radar installations and control method
Technical field
The present invention relates to radar detection technique field, more particularly to a kind of radar installations and control method.
Background technology
Compared with other active sensors, radar has the advantages that round-the-clock, detection range is remote, therefore in active detecting Field is widely used.Radar density is increasing in a region, when the frequency band of two or more radars, or When modulation system is same or like, two or more radars can be caused to interfere, so as to cause problems with:One side Face, if disturbing the burden that the signal processor of radar excessively, can be increased, under extreme case, radar is caused not work;The opposing party Face, radar chaff can cover target, have influence on the detection performance of the radar, in some instances it may even be possible to can false retrieval or missing inspection target.
The content of the invention
One of purpose of the present invention is to provide a kind of radar installations and control method, to solve in same region The technical problem that radar installations signal interferes.
In a first aspect, the invention provides a kind of radar installations, including controller, emitter, transmitting antenna and receiver, Also include controllable attenuator, the first signal input part of the controllable attenuator is connected with the signal output part of the emitter; The secondary signal input of the controllable attenuator is connected with the secondary signal output end of the controller;The controllable attenuator Signal output part be connected with the signal input part of the transmitting antenna;The signal output part of the receiver and the controller Signal input part connection;
The emitter produces detectable signal according to the control signal of the controller and transmitted to the controllable attenuator; The controllable attenuator adjusts the transmitting to detectable signal transmitted by the transmitting antenna according to the control signal of the controller Power;The echo-signal that the controller receives according to the receiver determines interference signal, and is adjusted according to the interference signal The detectable signal of the whole emitter.
Second aspect, the embodiment of the present invention additionally provides a kind of radar installations control method, for above-mentioned radar installations In, including:
Emitter produces detectable signal according to the control signal of controller and transmitted to controllable attenuator;
The controllable attenuator is adjusted to detection letter transmitted by the transmitting antenna according to the control signal of the controller Number transmission power;
The echo-signal that the controller receives according to the receiver determines interference signal, and is adjusted according to interference signal The detectable signal of the emitter.
Alternatively, the step of detectable signal of the adjustment emitter includes:
The frequency band or modulation system of detectable signal produced by changing emitter.
Alternatively, the step of echo-signal received according to the receiver determines interference signal includes:
Reduce the transmission power to detectable signal transmitted by the transmitting antenna;
Handle the echo-signal received and analyse whether interference signal.
Alternatively, described the step of having analysed whether interference signal, includes:
The noise power of echo-signal that receiver receives is obtained, if the noise power is more than and made an uproar in preset time period Acoustical power preset value, then interference signal be present in the echo-signal.
Radar installations provided in an embodiment of the present invention, controllable attenuator is controlled to produce different decay to hair by controller The detectable signal for penetrating machine transmitting is decayed, and radar installations is operated in normal operating conditions and Interference Detection work shape respectively State.In Interference Detection working condition, the echo-signal that controller receives according to receiver determines interference signal, according to interference signal Adjust the detectable signal of emitter.Doing between different radar installations in the same area can be avoided by adjusting the detectable signal Disturb, so as to reduce influence of the interference to radar installations normal work, improve the detection performance of radar installations.
Brief description of the drawings
The features and advantages of the present invention can be more clearly understood by reference to accompanying drawing, accompanying drawing is schematically without that should manage Solve to carry out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 is a kind of radar installations structural representation provided in an embodiment of the present invention;
Fig. 2 is another radar installations structural representation provided in an embodiment of the present invention;
Fig. 3 is another radar installations structural representation provided in an embodiment of the present invention.
Fig. 4 is a kind of radar installations control timing diagram provided in an embodiment of the present invention;
Fig. 5 is a kind of control method schematic flow sheet of radar installations provided in an embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
Embodiment one
The embodiments of the invention provide a kind of radar installations, as shown in figure 1, including controller 110, emitter 120, transmitting Antenna 150 and receiver 100, in addition to controllable attenuator 140, the first signal input part and emitter of controllable attenuator 140 120 signal output part connection;The secondary signal input of controllable attenuator 140 and the secondary signal output end of controller 110 Connection;The signal output part of controllable attenuator 140 is connected with the signal input part of transmitting antenna 150;The signal of receiver 100 is defeated Go out end to be connected with the signal input part of controller 110;
Emitter 120 produces detectable signal according to the control signal of controller 110 and transmitted to controllable attenuator 140;Can Control attenuator 140 adjusts the transmission power to detectable signal transmitted by transmitting antenna 150 according to the control signal of controller 110; The echo-signal that controller 110 receives according to receiver 100 determines interference signal, and adjusts emitter 120 according to interference signal Detectable signal.
It will be appreciated that controllable attenuator includes two kinds of working conditions:Normal operating conditions and Interference Detection working condition. Wherein, during normal operating conditions, controllable attenuator is now smaller to decay caused by detectable signal, ideally, detection Signal can be launched with zero-decrement by transmitting antenna;During Interference Detection working condition, controllable attenuator is now to detection Decay is bigger caused by signal, and ideally, detectable signal can not pass through the controllable attenuator.It is controllable in practical application Attenuator is decayed to detectable signal, as long as the transmission power for the detectable signal launched is sufficiently small, makes the radar installations Target can not be detected, and does not influence other radar installations of the same area.It is in addition, provided in an embodiment of the present invention controllable Attenuator can produce different decay, and the detectable signal that transmitting antenna is sent can cover different scopes, art technology Personnel can be set as the case may be.
Radar installations provided in an embodiment of the present invention, controllable attenuator is controlled to produce different decay to hair by controller The detectable signal for penetrating machine transmitting is decayed, so as to adjust the transmission power for the detectable signal for reaching transmitting antenna.Controller root The echo-signal received according to receiver determines interference signal, and the detectable signal of emitter is adjusted according to interference signal.Pass through adjustment The detectable signal can avoid disturbing between different radar installations in the same area, when being disturbed so as to reduce to target acquisition Influence, improve the detection performance of radar installations.
Embodiment two
The embodiment of the present invention provides a kind of radar installations again, as shown in Fig. 2 including controller 110, emitter 120, hair Penetrate antenna 150, reception antenna 105, controllable attenuator 140, in addition to coupler 130 and frequency mixer 160;
The signal input part of coupler 160 is connected with the signal output part of emitter 120, the signal output of coupler 130 End is connected with the first signal input part of controllable attenuator 140;Coupler 130 is used for the detectable signal for exporting emitter 120 Coupled to frequency mixer 160;
Second input of frequency mixer 160 is connected with the signal output part of reception antenna 105, and the signal of frequency mixer 160 is defeated Go out end to be connected with the signal input part of signal conditioning circuit 170;Frequency mixer 160 is used to believe the echo from reception antenna 105 Number it is mixed to obtain base band echo-signal with detectable signal.
Fig. 4 shows a kind of work schedule schematic diagram of radar installations provided in an embodiment of the present invention, is situated between with reference to Fig. 4 Continue the operation principle of the radar installations.As shown in figure 4, radar installations provided in an embodiment of the present invention include normal operating conditions with Interference Detection working condition.When radar installations enters normal operating conditions, a length of CPI (Coherent when controller produces N number of Processing Interval, coherent processing inteval) low level control signal, the control signal can control controllable attenuation Device produces less decay, the radar installations is carried out normal operating conditions, detects target and estimates to obtain the parameter of target.
Controller 110 sends control signal, and control signal control controllable attenuator 140 produces suitable decay so that Transmission signal can be sent to transmitting antenna 150 by controllable attenuator 140, and be radiate by transmitting antenna 150, be launched Detectable signal can detect a range of target, and run into target back reflection formed echo-signal.
The reception of reception antenna 105 echo-signal, which is transmitted to frequency mixer 160, coupler 130, is launched emitter 120 A detectable signal coupling part is used as local oscillated signal, and transmits to frequency mixer 160.The frequency mixer 160 visits above-mentioned part Signal is surveyed to be mixed with echo-signal.The frequency for the base band echo-signal that frequency mixer 160 is exported can be detectable signal with The combination of the frequency sum of echo-signal, the difference of frequency or the difference of frequency sum and frequency.Height is operated according to radar installations The characteristics of frequency band, alternatively, in the embodiment of the present invention frequency of the frequency sonding signal of base band echo-signal and echo-signal it Difference.The purpose of mixing is to reduce the frequency band for the detectable signal for being operated in high frequency band, is easy to subsequently handle echo-signal.It is mixed The base band echo-signal that frequency device 160 exports is filtered amplification by signal conditioning circuit 170 again, and adjusts base band echo letter Number bandwidth for transmission to controller 110, realize target detection and parameter Estimation.
Controller 110 is judged base band echo-signal, determines to whether there is in the echo-signal that receiver is received Interference signal.It is understood that the interference signal of meaning of the embodiment of the present invention refers to and radar provided in an embodiment of the present invention The frequency band or modulation system of the detectable signal that device is launched are same or similar, and (also having when frequency band and close modulation system can Larger interference can be caused) echo-signal.If not interfering with signal, controller 110 need not change control signal, so that hair Penetrate machine and emission detection signal is continued using current frequency band or modulation system.
When reception antenna 105 receives the echo-signal close with the frequency band of detectable signal or modulation system, can draw The noise power for playing the radar installations raises or occurred false target suddenly in a short time, now, judges in the same area Interior presence can cause other radar installations that the radar installations disturbs.
Radar installations provided in an embodiment of the present invention is additionally provided with Interference Detection working condition.As shown in figure 3, in order to determine The echo-signal that receiver is received is interference signal caused by other radar emissions or this radar installations hair in the same area The detectable signal penetrated is detected the echo-signal after thing reflection.Therefore, this radar installations in Interference Detection working condition, it is necessary to A length of CPI high level control controllable attenuator 140 produces larger decay when controller 110 produces one so that transmitting day The transmission power of the emission detection signal of line 150 is smaller.Now, the radar installations can not normally detect target, and detectable signal Other radar installations in the radar installations the same area are not interfered with yet.
Now, the receives echo-signal of reception antenna 105 is transmitted to frequency mixer 160, coupler 130 and is sent out emitter 120 The detectable signal penetrated is used as local oscillated signal coupled to frequency mixer 160.The frequency mixer 160 enters echo-signal and detectable signal Row mixing, obtains base band echo-signal.When the base band echo-signal is transmitted to controller 110, base band echo-signal is obtained Noise power, if noise power is more than noise power preset value in setting time section, or false target is detected, controlled Device 110 confirms interference signal be present, i.e. this radar installations working band or modulation system is occupied in current operating environment. Now, controller 110 adjusts control signal, to change the frequency band for the detectable signal that emitter 120 is launched or modulation system. Then, radar installations repeat the Interference Detection course of work, change control signal, until echo-signal in do not interfere with signal or During interference signal very little, the radar installations is just operated in next cycle using the frequency band after adjustment or modulation system.
The embodiment of the present invention adds Interference Detection working condition by increasing controllable attenuator in radar installations, Radar installations detects the radar installations that can be interfered with the presence or absence of other in the same area when being in the state, if work be present In same frequency band or the radar installations of modulation system, then change the frequency band or modulation methods of this radar installations emission detection signal Formula, the problem of multi-section radar installations interferes in the region can be so avoided, strengthen the adaptive capacity to environment of radar installations With detecting target capability.
Alternatively, radar installations provided in an embodiment of the present invention also includes signal conditioning circuit 170, the signal conditioning circuit 170 signal input part is connected with the signal output part of frequency mixer 160, the signal output part of signal conditioning circuit 170 and 110 controls The signal input part connection of device processed;
The base band echo-signal that signal conditioning circuit 170 is used for self-mixing device in future 160 carries out being processed and transmitted to control Device 110.
Alternatively, the signal conditioning circuit 170 is amplified to base band echo-signal, and adjusts the base band echo-signal Bandwidth.
The embodiment of the present invention can be filtered by the signal conditioning circuit to base band echo-signal, only allow by with The base band echo-signal of set frequency band, it can so improve the speed that controller 110 handles base band echo-signal;And may be used also To improve the detection performance of radar installations.
Embodiment three
The embodiment of the present invention additionally provides a kind of radar installations, as shown in figure 3, including controller 110, emitter 120, hair Penetrate antenna 150, reception antenna 105, low noise radio frequency amplifier 180 and wave detector 190.
In embodiments of the present invention, controller 110 sends control signal and is sent to emitter.Emitter 120 is according to control Signal produces detectable signal and transmitted to controllable attenuator 140.The detectable signal is operated in the frequency band and modulation system of setting, and The control signal of adjustment controller 110 can change the frequency band and modulation system of detectable signal.
Controller 110 produces the control signal of control controllable attenuator 140, wherein, as shown in figure 4, the control signal bag When including a length of CPI high level or when a length of CPI low level.When control signal is during a length of CPI low level, now Controllable attenuator 140 produces less decay to the transmission power of detectable signal, and now detectable signal can pass through transmitting antenna 150 radiate.When control signal is during a length of CPI high level, transmission power of the controllable attenuator 140 to detectable signal Larger decay is produced, now only a small amount of detectable signal can be transmitted by controllable attenuator to transmitting antenna 150.
The receives echo-signal of reception antenna 105 is transmitted to low noise radio frequency amplifier 180, and radiofrequency signal is amplified, And adjust the bandwidth of signal.When being transmitted after the detection of wave detector 190 to controller 110, the noise power of echo-signal is obtained, such as The noise power of fruit echo-signal is more than noise power preset value in setting time section, or detects false target, control Device 110 confirms to exist in echo-signal with the detectable signal with frequency band or the interference signal with identical modulation system, this thunder Up to device working band or modulation system in current operating environment it is occupied.Controller 110 adjusts control signal, to change The frequency band or modulation system for the detectable signal that emitter 120 is launched.
By said process, the embodiment of the present invention can change frequency band or the modulation of radar installations institute emission detection signal Mode, makes the detectable signal of the radar installations not influence other radar installations, at the same the detectable signal of other radar installations or Echo-signal nor affects on this radar installations, so as to avoid interfering phenomenon between radar installations, can improve radar The detection performance of device.
Example IV
Further to embody a kind of superiority of radar installations provided in an embodiment of the present invention, the embodiment of the present invention provides again A kind of radar installations control method, as shown in figure 5, including:Emitter produces detectable signal according to the control signal of controller And transmit to controllable attenuator;Controllable attenuator is adjusted to detectable signal transmitted by transmitting antenna according to the control signal of controller Transmission power;The echo-signal that controller receives according to receiver determines interference signal, and is adjusted and launched according to interference signal The detectable signal of machine.Below control method provided in an embodiment of the present invention is deployed to be described in detail.
Emitter is introduced first to produce detectable signal according to the control signal of controller and transmit to the step of controllable attenuator Suddenly.
In embodiments of the present invention, as shown in Figure 1 to 4, controller 110 sends control signal and is sent to emitter.Hair Machine 120 is penetrated to be transmitted to controllable attenuator 140 according to control signal generation detectable signal.The detectable signal is operated in the frequency band of setting And modulation system, and the control signal for adjusting controller 110 can change the frequency band and modulation system of detectable signal.
Next is introduced controllable attenuator and adjusted according to the control signal of controller to detectable signal transmitted by transmitting antenna The step of transmission power.
As shown in FIG. 1 to 3, controller 110 produces the control signal of control controllable attenuator 140, wherein, such as Fig. 4 institutes Show, the control signal when including a length of CPI high level or when a length of CPI low level.A length of CPI when control signal is Low level when, now controllable attenuator 140 produces less decay to the transmission power of detectable signal, and now detectable signal can To be radiate by transmitting antenna 150.When control signal is during a length of CPI high level, controllable attenuator 140 is to detection The transmission power of signal produces larger decay, and now only a small amount of detectable signal can be transmitted by controllable attenuator to hair Penetrate antenna 150.
Finally introduce the echo-signal that controller receives according to receiver and determine interference signal, and adjusted according to interference signal The step of detectable signal of emitter.
The receives echo-signal of reception antenna 105 transmits the spy for being launched emitter 120 to frequency mixer 160, coupler 130 Survey signal and be used as local oscillated signal coupled to frequency mixer 160.The frequency mixer 160 is mixed echo-signal and detectable signal Frequently, base band echo-signal is obtained.Because the base band echo-signal is fainter, it is also necessary to base band echo information is amplified, And adjust the bandwidth of the base band echo-signal.When the base band echo-signal is transmitted to controller 110, base band echo-signal is obtained Noise power, if the noise power of base band echo-signal is more than noise power preset value, Huo Zhejian in setting time section False target is measured, controller 110 confirms to exist in base band echo-signal with frequency band or has the phase people having the same aspiration and interest with the detectable signal The interference signal of mode processed, this radar installations working band or modulation system are occupied in current operating environment.Controller 110 adjustment control signals, to change the frequency band for the detectable signal that emitter 120 is launched or modulation system.
By said process, the embodiment of the present invention can change frequency band or the modulation of radar installations institute emission detection signal Mode, makes the detectable signal of the radar installations not influence other radar installations, at the same the detectable signal of other radar installations or Echo-signal nor affects on this radar installations, so as to avoid interfering phenomenon between radar installations, can improve radar The detection performance of device.
In summary, a kind of radar installations provided by the invention and control method, by controlling controllable attenuator, make this hair The radar installations that bright embodiment provides is operated in normal work and Interference Detection working condition.Examined in Interference Detection working condition The noise power of echo-signal is surveyed, or detection of false target determines whether there is interference signal.When interference signal be present, lead to Cross and change frequency band or modulation system that this radar installations sends detectable signal, avoid disturbing between radar installations, have There are preferable target detection capabilities.Meanwhile present invention also improves the performance of radar installations detection target.
Embodiment of above is merely to illustrate the present invention, and not limitation of the present invention, about the common of technical field Technical staff, without departing from the spirit and scope of the present invention, it can also make a variety of changes and modification, thus it is all Equivalent technical scheme falls within scope of the invention, and scope of patent protection of the invention should be defined by the claims.

Claims (5)

1. a kind of radar installations, including controller, emitter, transmitting antenna and receiver, it is characterised in that
Also include controllable attenuator, the first signal input part of the controllable attenuator connects with the signal output part of the emitter Connect;The secondary signal input of the controllable attenuator is connected with the secondary signal output end of the controller;It is described controllable to decline The signal output part for subtracting device is connected with the signal input part of the transmitting antenna;The signal output part of the receiver and the control The signal input part connection of device processed;
The emitter produces detectable signal according to the control signal of the controller and transmitted to the controllable attenuator;It is described Controllable attenuator adjusts the transmission power to detectable signal transmitted by the transmitting antenna according to the control signal of the controller; The echo-signal that the controller receives according to the receiver determines interference signal, and according to interference signal adjustment The detectable signal of emitter, the interference in the same area between different radar installations is avoided by adjusting the detectable signal.
A kind of 2. radar installations control method, it is characterised in that in the radar installations described in claim 1, including:
Emitter produces detectable signal according to the control signal of controller and transmitted to controllable attenuator;
The controllable attenuator is adjusted to detectable signal transmitted by the transmitting antenna according to the control signal of the controller Transmission power;
The echo-signal that the controller receives according to the receiver determines interference signal, and according to adjusting interference signal The detectable signal of emitter.
3. radar installations control method as claimed in claim 2, it is characterised in that the detection letter of the adjustment emitter Number the step of include:
The frequency band or modulation system of detectable signal produced by changing emitter.
4. radar installations control method as claimed in claim 2, it is characterised in that described to be returned according to what the receiver received The step of ripple signal determines interference signal includes:
Reduce the transmission power to detectable signal transmitted by the transmitting antenna;
Handle the echo-signal received and analyse whether interference signal.
5. radar installations control method as claimed in claim 4, it is characterised in that the step for analysing whether interference signal Suddenly include:
The noise power for the echo-signal that receiver receives is obtained, if the noise power is more than noise work(in preset time period Rate preset value, then interference signal be present in the echo-signal.
CN201510363060.4A 2015-06-26 2015-06-26 Radar installations and control method Expired - Fee Related CN105022033B (en)

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