CN106526623A - Generation method and device for generating synthesized signal during satellite navigation anti-interference test - Google Patents
Generation method and device for generating synthesized signal during satellite navigation anti-interference test Download PDFInfo
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- CN106526623A CN106526623A CN201610756076.6A CN201610756076A CN106526623A CN 106526623 A CN106526623 A CN 106526623A CN 201610756076 A CN201610756076 A CN 201610756076A CN 106526623 A CN106526623 A CN 106526623A
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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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
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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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
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- Radar, Positioning & Navigation (AREA)
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- Computer Networks & Wireless Communication (AREA)
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention provides a generation method and a device for generating a synthesized signal during the satellite navigation anti-interference test and relates to the technical field of satellite navigation. The method comprises the following steps of respectively generating an analog satellite signal and an analog interference signal according to the signal power information, respectively subjecting the two signals to phase shifting according to the signal propagation information input by a user so as to simulate the time delay of the signals during the transmission process in a real environment, and combining the two signals to generate a synthesized signal. During the signal synthesizing process, only an electronic device for conducting the phase shifting of the signals is adopted, so that the influence of the external environment on the signal synthesizing process is avoided. Therefore, no other noise exists in the synthesized signal. Meanwhile, the generation of the synthesized signal is only controlled by the electronic device. Therefore, the relative position of a signal source relative to array elements is not adjusted again, so that the test convenience is improved.
Description
Technical field
The present invention relates to technical field of satellite navigation, in particular to composite signal in the anti-interference test of satellite navigation
Generation method and device.
Background technology
With the innovation of electronic information technology, airmanship has been widely applied in daily production and life.
General airmanship is divided into three types, and the first is to rely on the airmanship of external signal (as Beidou navigation, GPS lead
Boat etc. depends on the Satellite Navigation Technique of outside positioning)；The airmanship of external signal is not dependent on for second (such as strapdown
With platform-type inertial navigation technology, this kind of technology the equipment such as 3 axle gyroscopes and 3 axis accelerometers are usually used detect carrier from
The angular movement of body and line movable information, the position for resolving to determine carrier by inertial navigation)；The third is the group of first two
Close, i.e. while obtaining external information and internal information, and both information are merged, carry out location navigation.
For it is above-mentioned the first with the third in the case of, satellite navigation terminal needs to utilize satellite-signal, realizes that navigation is fixed
Position, test the speed, timing and information are exchanged.The satellite-signal sent by satellite navigation system be easily subject to it is various be not intended to, it is intentional dry
The impact of signal is disturbed, and then affects the positioning precision of the availability and satellite navigation terminal of satellite-signal.Therefore, how to improve and defend
The antijamming capability of star navigation terminal is the inexorable trend of satellite navigation application development, meanwhile, to the anti-dry of satellite navigation terminal
Immunity can be carried out, and convenient, effective test is become for main R＆D direction.
At present, the interference free performance test for being carried out to satellite navigation terminal is all carried out in microwave dark room or outfield.
The test general flow carried out under the conditions of microwave dark room is as follows：Set up multiple antenna holders first in darkroom, and day will be launched
Line is arranged on antenna holder, and these antenna launches the signal of satellite navigation signal source and interference signal source respectively.Specified
The array antenna of pending anti-interference test is set (typically on ground) on position.By adjustment antenna holder in darkroom
The height (changing the relative position of transmitting antenna and array antenna) of position and antenna on support, it becomes possible to which simulation is from difference
Incide the satellite navigation signals and interference signal of array antenna in direction.During actual measurement, satellite navigation signals and interference signal are simultaneously
To array antenna project, array antenna received to signal be satellite navigation signals and interference signal superposition after synthesis letter
Number；Further, array antenna received carries out anti-interference process to composite signal to after satellite navigation signals and interference signal.According to upper
Mode is stated, the incident direction and power of two kinds of signals of adjustment of formula is traveled through, is just completed injection task of the signal to array antenna,
Afterwards, the ability for investigating array antenna filtering interference signals from signal just can be derived that the interference free performance of array antenna.
But, the drawbacks of this kind of test mode has certain, as microwave dark room is involved great expense, adjusts aerial position and angle
Take long etc..Further, in current techniques, the mode for carrying out anti-interference test to array antenna is not ideal enough.
The content of the invention
It is an object of the invention to provide in the anti-interference test of satellite navigation composite signal generation method and device, with drop
The low difficulty that anti-interference test is carried out to array antenna.
In a first aspect, embodiments providing the generation method of composite signal in the anti-interference test of satellite navigation, wrap
Include：
Simulation satellite signal and simulaed interference signal are generated respectively according to the signal power information of user input；
Each simulation satellite signal is calculated according to the array antenna information and signal propagation information of user input and simulation is dry
Disturb the phase change information of signal；
Phase shift is carried out to corresponding simulation satellite signal and simulaed interference signal respectively according to phase change information；
Simulation satellite signal and simulaed interference signal received by same array element is combined, multiple array elements are generated
Composite signal.
On the other hand, the generating means of composite signal in the anti-interference test of satellite navigation are embodiments provided, is wrapped
Include：
Signal generation module, generates simulation satellite signal and simulation respectively for the signal power information according to user input
Interference signal；
Phase calculation module, calculates each simulation for propagating information according to the array antenna information of user input and signal
The phase change information of satellite-signal and simulaed interference signal；
Phase shift block, for entering to corresponding simulation satellite signal and simulaed interference signal according to phase change information respectively
Row phase shift；
Combining module, for the simulation satellite signal and simulaed interference signal received by same array element is combined,
Generate the composite signal of multiple array elements.
The generation method of composite signal in the anti-interference test of satellite navigation provided in an embodiment of the present invention, using to general
Test signal enters the mode of horizontal phasing control, be merely able in prior art it is relative between signal source and aerial array by changing
The mode of position, adjusts the signal received by array element, causes to need ceaselessly to adjust the position of signal source during test so that
Requirement of the excessive cycle, test of test to environment is too strictly compared, and which is generated respectively by first basis signal power information
Simulation satellite signal and simulaed interference signal, afterwards, then the signal of foundation user input propagates information respectively to the two signals
Carry out phase shift, with simulate signal in true environment in transmitting procedure caused by time delay, finally, by both signal combinings with
Generate composite signal, due to generate composite signal during only used electronic equipment to carry out phase shift, there is no external environment condition
The impact for causing, thus in composite signal, there are no other noises, meanwhile, the generation of composite signal only needs to the control of electronic equipment
System, it is not necessary to readjust the relative position between signal source and array antenna, improve the convenient degree of test.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by to be used attached needed for embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, thus be not construed as it is right
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows the satellite navigation interference free performance test schematic diagram based on microwave dark room；
Fig. 2 shows the work of composite signal generating means in the anti-interference test of satellite navigation provided by the embodiment of the present invention
Make flow chart；
Fig. 3 shows the work(of composite signal generating means in the anti-interference test of satellite navigation provided by the embodiment of the present invention
Can structured flowchart；
Fig. 4 shows the single phase shift channel design figure of phase shift block provided by the embodiment of the present invention；
Fig. 5 shows the complete method of testing flow chart provided by the embodiment of the present invention；
Fig. 6 shows the anti-interference method of testing execution step of satellite navigation provided by the embodiment of the present invention；
During Fig. 7 shows the anti-interference test device of satellite navigation provided by the embodiment of the present invention, filter and power amplification
The detailed structure figure of module；
Fig. 8 shows that the anti-interference test device of satellite navigation provided by the embodiment of the present invention carries out the result of emulation testing
Schematic diagram.
Main element symbol description：
DA digital to analog converters；
1 point of 4 power splitter of HLGF-4HR；
16 passage phase shifters of HLYX-16；
HJ shielding box CD-08 shielded boxes.
Specific embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Generally exist
The component of the embodiment of the present invention described and illustrated in accompanying drawing can be arranged and be designed with a variety of configurations herein.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
Many in correlation technique the interference free performance of array antenna to be tested by the way of microwave dark room, this is mainly
The environment of microwave dark room is relatively stable, and no outer signals are interfered to test.
Test mode in conventional art is as shown in Figure 1.Microwave dark room provides pure test environment, carries out in darkroom
Interference free performance is tested accurately and reliably, but darkroom involves great expense, and needs to install moving guide rail and the control of antenna holder
Equipment；For the completeness for realizing testing, repeatedly adjustment signal incident direction is needed, after adjusting every time, calibration signal again is needed
Power, so test process is：Signal power → test the interference free performance of adjustment aerial position → calibration each antenna → again
Signal power → test the interference free performance of secondary adjustment each antenna of calibration of aerial position → again, the multiple surveys of such searching loop
Signal incident direction set by the scape of examination hall, test process are loaded down with trivial details and time-consuming.And tested under external field environment, satellite navigation
Signal may come from real satellite navigation signal (not needing independent satellite signal source), but need to set up multiple transmittings
Antenna launches interference signal, and the problem of calibration interfering signal power again is needed after there is also adjustment interference signal incident direction,
And field testing need to possess Land leveling, open, object of the surrounding without metal pylon, house and other possible reflection electromagnetic waves
Etc. condition, the requirement for building test environment is more.If, there is the multipath letter that indoor reflection is caused in no dark room conditions indoors
Number, uncertain is come to interference free performance calibration tape.Correlated condition is unsatisfactory for not possessing construction microwave dark room or external field environment
Situation, need badly a kind of simple and effectively method of testing and device are realizing anti-interference test.
To the main task tested by the interference free performance of antenna be in array element inject composite signal (satellite-signal with
The signal that formed after interference signal superposition), and composite signal is to need controllable (do not have the signal in the external world to composite signal
Cause uncontrollable interference), due to directly make use of natural environment that time delay and decay (signal biography are carried out to signal in conventional art
Broadcast the impact that the factors such as distance and angle are caused to signal), therefore, requirement of the conventional art to test environment is very high, mainly
In order to avoid uncontrollable interference.
And in traditional measuring technology, the relative position being constantly changing between signal source and array antenna is needed, come
Signal scene of the simulation from incidence angles degree to array antenna, the whole incident angles of traversal require a great deal of time and essence
Power.
For this kind of situation, this application provides in the anti-interference test of satellite navigation composite signal generating means, drop
The generation difficulty of low composite signal, so as to reduce the complexity of anti-interference test.
As shown in Figure 2, there is provided the generating means of composite signal in the anti-interference test of satellite navigation provided herein
Workflow diagram, comprise the steps：
S101, generates simulation satellite signal and simulaed interference signal respectively according to the signal power information of user input；
S102, propagates information according to the array antenna information and signal of user input and calculates each simulation satellite signal and mould
Intend the phase change information of interference signal；
S103, carries out phase shift to corresponding simulation satellite signal and simulaed interference signal respectively according to phase change information；
S104, the simulation satellite signal and simulaed interference signal received by same array element is combined, and is generated multiple
The composite signal of array element.
In step S101, user can be to input signal power information in device, to determine life when operation device
Into simulation satellite signal and simulaed interference signal power.Wherein, user herein refers to the operating personnel of use device,
It can be by this signal power input unit institute that another signal power input unit, the i.e. signal power can also be referred to
There is provided, the signal power input unit can be arranged on the interior of the generating means of composite signal in the anti-interference test of satellite navigation
Portion.
Except control signal power, being input into by user/selection signal (simulation satellite signal and simulation interference letter
Number) species, the information such as wavelength, such information belongs to the attribute information of signal, no longer excessively repeats herein.Need explanation
It is that the information such as signal power and species can be multiple to prestore in being input into numerical value, or system by keyboard by user
Representative value (such as the amplitude of multiple signal powers), so that user is selected.Thus, can avoid user input that not there is practical operation
The numerical value of value.
In step S102, similar with step S101, the user mentioned in the step can equally be the people of practical operation
Member, or individually information input equipment (as array antenna information input equipment and signal propagate information input equipment).
Specifically, array antenna information includes the manifold (linear, circular and square etc.) of antenna, array element quantity, array element distance etc..Letter
Number propagation information refers to the information such as the distance between signal source and array antenna, incident orientation angle, the incident elevation angle.Signal is being propagated
During, cause signal phase different as the time for reaching different array elements is different, therefore, adjust signal when
Wait, information can be propagated to adjust the phase place of signal according to the signal is input into by user.In step 102, then need first according to letter
Number propagation information is calculating the phase change information of each signal (simulation satellite signal and simulaed interference signal).
In step S103, directly using calculated phase change information, by phase shifter come respectively to each signal
(simulation satellite signal and simulaed interference signal) carries out phase shift.
In step S104, the signal through phase shift is combined by needs, to form composite signal.It should be noted that
Array antenna generally includes multiple array elements, therefore, the simulation satellite signal and simulaed interference signal generated in step S101 is equal
It is multiple, the concrete quantity for generating should be identical with the sum of array element.Also, when signal combining, will should be sent to
The signal of same array element is combined.
Finally, after composite signal is generated by combining, directly composite signal is input in corresponding bay
, during injection, using shielded box and transmitting antenna, composite signal is injected to corresponding array element in the way of empty feedback.Subsequently
Test process is identical with the mode existed in correlation technique, herein no longer excessive explanation.
In above-mentioned steps, step S102, calculate phase change information the step of it is more important, below, for different days
Line manifold, the formula for calculating phase information have corresponding adjustment.
If the array antenna that array element is formed is circular array, step S102 can calculate each simulation according to equation below and defend
The phase change information of star signal and simulaed interference signal：
In formula, subscript m represents the parameter of m-th signal, and subscript n represents the parameter of n-th array element, θmIt is incident for signal
Azimuth, φmFor the signal incidence elevation angle, the radius of the circular array antenna that R is located for array element, αnIt is n-th array element in array day
Azimuth in line, λ are default signal wavelength.
If the array antenna that array element is formed is square array, step S102 can calculate each simulation according to equation below and defend
The phase change information of star signal and simulaed interference signal：
In formula, subscript m represents the parameter of m-th signal, and subscript n represents the parameter of n-th array element, θmIt is incident for signal
Azimuth, φmFor the signal incidence elevation angle, the circumradius of the square array antenna that R is located for array element, rnFor n-th array element with
The distance in the circumscribed circle center of circle, αnThe azimuth for being n-th array element in array antenna, λ is default signal wavelength.
If the array antenna that array element is formed is linear array, step S102 can calculate each simulation according to equation below and defend
The phase change information of star signal and simulaed interference signal：
In formula, subscript m represents the parameter of m-th signal, and n is the sequence number of n-th array element, θmFor signal incident orientation
Angle, φmFor the signal incidence elevation angle, spacing of the d for the two neighboring array element of linear array antenna, λ are default signal wavelength.
Further, in order to ensure stablizing for signal, it is identical between mainly different signals, can be using power point
One original simulation satellite signal is assigned as the equal N roads simulation satellite signal of power by orchestration, and original by one
Simulaed interference signal is assigned as the equal N roads simulaed interference signal of power, in order to subsequent process used in, specifically, this Shen
The method for please being provided also includes：
According to the power information of user input, simulation satellite signal and simulaed interference signal are generated respectively；
Simulation satellite signal is carried out into power distribution, to generate N roads simulation satellite signal, N is array element in array antenna
Total quantity；
Simulaed interference signal is carried out into power distribution, to generate N roads simulaed interference signal, N is array element in array antenna
Total quantity.
Further, it is contemplated that when signal combining, and signal device interior carry out signal transacting and propagate when
Wait, harmonic wave and clutter can be produced, therefore, after phase shift is carried out to signal, also signal should be filtered and power amplification,
To generate the interference signal for meeting that default jamming-to-signal ratio is required.
Below, with a specific device embodiment illustrating the generation side of composite signal in the anti-interference test of satellite navigation
The action of each part of method and device.As shown in figure 3, device is made up of multiple modules.Below with regard to the work of each module
Illustrate as content：
Signal power input module, can instruct according to the corresponding signal power of the numerical generation of user input/selection, with
It is easy to signal generation module to generate the signal of correspondence power.
Signal generation module, the signal power instruction provided by basis signal power input module generate original satellite respectively
Signal and original disturbed signal.And both signals for generating are inputed to into power distribution module.
Power distribution module, each raw satellite signal for generating is defended by the Form generation N roads simulation of power distribution
Star signal, wherein, N is tested array antenna array number.And, by each side of the original analog interference signal by power distribution
Formula generates N roads simulaed interference signal.
Phase calculation module, the array antenna information and signal for being provided according to user are propagated information and calculate each letter
Number phase information.
Specifically, for different antenna manifolds, it is possible to use formula below is calculated, when the array that array element is formed
Antenna is circular array, and corresponding computing formula is as follows：
In formula, subscript m represents m-th signal xmParameter, subscript n represents the parameter of n-th array element, θmEnter for signal
Penetrate azimuth, φmFor the signal incidence elevation angle, the radius of the circular array antenna that R is located for array element, αnIt is n-th array element in array
Azimuth in antenna, λ are default signal wavelength.
When the array antenna that array element is formed is square array, corresponding computing formula is as follows：
In formula, subscript m represents m-th signal xmParameter, subscript n represents the parameter of n-th array element, θmEnter for signal
Penetrate azimuth, φmFor the signal incidence elevation angle, circumradiuses of the R for array element place square array, rnFor n-th array element with it is external
The distance of the round heart, αnThe azimuth for being n-th array element in array antenna, λ is default signal wavelength.
When the array antenna that array element is formed is linear array, corresponding computing formula is as follows：
In formula, N is that array element is total, and subscript m represents m-th signal xmParameter, θmFor signal incident orientation angle, φmFor
The signal incidence elevation angle, spacing of the d for the two neighboring array element of linear array antenna, λ are default signal wavelength.
Phase shift block, is carried out at phase shift to each signal for the result of calculation that generated according to phase calculation module
Reason.Phase delay is carried out to the signal after work(point, the signal comprising spatial incident direction information, the 1st letter is produced
The signal for number inciding N number of array element is expressed as Y1=[y11,y12,…y1N], the signal that the 2nd signal incides N number of array element is represented
For Y2=[y21,y22,…y2N], and so on, the signal that m-th signal incides N number of array element is expressed as Ym=[ym1,ym2,…
ymN].The form of the signal that different incident directions are produced using same signal is indicated herein.
As shown in Figure 4, there is provided the concrete structure of phase shift block.In Fig. 4, main control computer is the phase calculation in Fig. 3
Module, for the control information of phase shift to be supplied to the microprocessor of phase shift block.Control information is carried out through digital to analog converter
Digital-to-analogue conversion produces control voltage, realizes 0 °～360 ° changes of phase place to control LTC5588-1 quadrature modulators, meanwhile, power
The simulation satellite signal and simulaed interference signal provided by distribute module also inputs to LTC5588-1 quadrature modulators, and then
LTC5588-1 quadrature modulators realize the phase-modulation to simulation satellite signal and simulaed interference signal.Entering line phase tune
After system, in addition it is also necessary to both signals are processed by low pass filter and power amplifier, to ensure signal quality and work(
Rate.More specifically, as shown in Figure 7, there is provided the circuit diagram of power amplifier and wave filter.
Combining module, each signal for phase shift is produced are combined.For square array, will…、Combining generates the signal S received by array antenna array element 11, will…、Combining generates the signal S received by array antenna array element 22, in this manner
Generate all array element received signals.Circular, linear array is similar, repeats no more here.
Signal injection module, wherein comprising transmitting antenna and shielded box, the array antenna array element that simulation is generated is received
The signal S for arriving1、S1、…、SNArray antenna difference array element, hot-wire array Antenna Anti-jamming are injected separately into by empty feedback mode
Energy.To prevent multiple aerial signals from influencing each other, signal injection module possesses signal shielding function and (has shielded box by encirclement
Transmitting antenna corresponding signal is injected in bay), it is ensured that the signal of the antenna that simulation is generated is only by a battle array
Unit receives.
Signal source signal is the signal received by array antenna array element after radio frequency link loss, space attenuation.
Radio frequency link is lost and space attenuation is can determine by calibration, then the signal that array element is received can pass through main control computer control
The mode of signal source processed carries out power adjustment, changes the side of signal source incident angle, array antenna manifold by main control computer
Formula is adjusted to phase place, and the embodiment of the present invention is easily achieved the analog signal comprising various spatial informations, is not only able to improve
The spreadability and reliability of test, and automatic test can be realized.
Complete method of testing flow charts of the Fig. 5 for the embodiment of the present invention.As shown in figure 5, step S502 is first carried out, arrange
Satellite navigation signals scene generates simulation satellite signal, arranges interference source parameter and generates simulaed interference signal, needs the ginseng for arranging
Number includes satellite frequency, satellite-signal power, interference signal type, interference signal quantity, interfering signal power, interference letter
Number incident orientation angle and the elevation angle.And then device produces the signal (simulation satellite signal and simulaed interference signal) of test, step
504, the interference free performance of array antenna is checked in the presence of interference, if being unsatisfactory for performance indications requirement, test knot
Beam；If meeting performance indications requirement, then whether execution step 506 judges whether test scene travels through and (refer to signal source and battle array
Test corresponding to the position relationship of array antenna has all been completed), if test scene has stepped through, test terminates；Otherwise, more
508 test scene of execution step is changed, with certain resolution adjustment signal incident direction and signal power, is proceeded anti-interference
Performance test, is unsatisfactory for performance indications requirement until having traveled through all test scenes or array antenna, then test terminates.
As shown in fig. 6, showing the method execution step from from the perspective of device.The step of correspondence is respectively step
602, satellite navigation signal source and disturbance signal source receive the parameter (signal power information) of signal source respectively, and then generate
Raw satellite signal and original disturbed signal.Step 604, by the way of power distribution, by raw satellite signal and original dry
Disturb signal and form multi-channel analog satellite-signal and simulaed interference signal respectively.Step 606, phase shifter receive the phase shift of host computer and refer to
Order, enters horizontal phasing control to each signal respectively.Step 608, each combining module, by signal corresponding array element to be received
It is combined.Step 610, by way of empty feedback is injected into the signal that combining is formed in corresponding array element.
As shown in figure 8, showing the directional diagram formed for different incident direction individual signals by circular array antenna
Simulation calculation.Can arrange parameter have element number of array (4 array elements, 5 array elements, 6 array elements, 7 array elements), array element distance, signal frequency point wavelength,
Signal the incidence elevation angle and azimuth etc., generate the signal that each bay is received according to these parameter simulations.Aerial array root
Filter weights (also can artificially adjust weights), in Fig. 8, the bay direction of 3-D graphic are calculated according to the incoming signal for being received
Figure reflects rejection ability of the aerial array to certain incident direction interference.Based on above-mentioned thinking, the present invention proposes that satellite navigation is anti-dry
The generation method and device of composite signal in test are disturbed, is implementing for above-mentioned emulation thinking.
The embodiment of the present application additionally provides relative with the generation method of composite signal in the anti-interference test of aforementioned satellite navigation
The generating means of composite signal in the anti-interference test of satellite navigation answered, including：
Signal generation module, generates simulation satellite signal and simulation respectively for the signal power information according to user input
Interference signal；
Phase calculation module, calculates each simulation for propagating information according to the array antenna information of user input and signal
The phase change information of satellite-signal and simulaed interference signal；
Phase shift block, for entering to corresponding simulation satellite signal and simulaed interference signal according to phase change information respectively
Row phase shift；
Combining module, for the simulation satellite signal and simulaed interference signal received by same array element is combined,
Generate the composite signal of multiple array elements.
Preferably, if the array antenna that array element is formed is circular array, phase calculation module is further used for according to such as
Lower formula calculates the phase change information of each simulation satellite signal and simulaed interference signal：
In formula, subscript m represents the parameter of m-th signal, and subscript n represents the parameter of n-th array element, θmIt is incident for signal
Azimuth, φmFor the signal incidence elevation angle, radiuses of the R for circular array antenna, αnThe azimuth for being array element in array antenna, λ
For default signal wavelength.
Preferably, if the array antenna that array element is formed is square array, phase calculation module is further used for according to such as
Lower formula calculates the phase change information of each simulation satellite signal and simulaed interference signal：
In formula, subscript m represents the parameter of m-th signal, and subscript n represents the parameter of n-th array element, θmIt is incident for signal
Azimuth, φmFor the signal incidence elevation angle, circumradiuses of the R for square array antenna, rnFor n-th array element and the circumscribed circle center of circle
Distance, αnThe azimuth for being n-th array element in array antenna, λ is default signal wavelength.
Preferably, if the array antenna that array element is formed is linear array, phase calculation module is further used for according to such as
Lower formula calculates the phase change information of each simulation satellite signal and simulaed interference signal：
In formula, subscript m represents the parameter of m-th signal, and n represents the sequence number of n-th array element, θmFor signal incident orientation
Angle, φmFor the signal incidence elevation angle, spacing of the d for the two neighboring array element of linear array, λ are default signal wavelength.
Preferably, also include：
Primary signal generation module, for the power information according to user input, generates simulation satellite signal and mould respectively
Intend interference signal；
First power distribution module, for simulation satellite signal is carried out power distribution, to generate N roads analog satellite letter
Number, N is the total quantity of array element in array antenna；
Second power distribution module, for simulaed interference signal is carried out power distribution, to generate N roads simulation interference letter
Number, N is the total quantity of array element in array antenna.
Preferably, also including the filtering and power amplifier module being connected between combining module and phase shift block, for right
Simulation satellite signal and simulaed interference signal after phase shift is filtered and adjusts with power, to filter out-of-band harmonics and clutter, and
Power amplification is carried out to interference signal, the interference signal for meeting that default jamming-to-signal ratio is required is generated.Specifically, filtering and power amplification
The circuit diagram of module is as shown in Figure 7.
Preferably, also include：Injection module, for using shielded box and transmitting antenna, by composite signal with the side of empty feedback
Formula is injected to corresponding array element.
Those skilled in the art can be understood that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and module, may be referred to the corresponding process in preceding method embodiment, will not be described here.
If function realized using in the form of SFU software functional unit and as independent production marketing or use when, can store
In a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words to existing
There are part that technology contributes or the part of the technical scheme embody in the form of software product, the computer
Software product is stored in a storage medium, is used so that a computer equipment (can be personal meter including some instructions
Calculation machine, server, or network equipment etc.) perform all or part of step of each embodiment method of the invention.And it is aforesaid
Storage medium includes：USB flash disk, portable hard drive, read-only storage (ROM, Read-Only Memory), random access memory
(RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
More than, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any to be familiar with
Those skilled in the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be covered
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. in the anti-interference test of satellite navigation composite signal generation method, it is characterised in that include：
Simulation satellite signal and simulaed interference signal are generated respectively according to the signal power information of user input；
Information is propagated according to the array antenna information and the signal of user input and calculates each simulation satellite signal and mould
Intend the phase change information of interference signal；
Phase shift is carried out to corresponding simulation satellite signal and simulaed interference signal respectively according to the phase change information；
Simulation satellite signal and simulaed interference signal received by same array element is combined, the synthesis of multiple array elements is generated
Signal.
2. in the anti-interference test of satellite navigation according to claim 1 composite signal generation method, it is characterised in that if
The array antenna that the array element is formed is circular array, then the array antenna information and the letter of the step according to user input
Number propagation information calculates each simulation satellite signal and the phase change information of simulaed interference signal to be included, according to equation below meter
Calculate the phase change information of each simulation satellite signal and simulaed interference signal：
In formula, subscript m represents the parameter of m-th signal, and subscript n represents the parameter of n-th array element, θmFor signal incident orientation
Angle, φmFor the signal incidence elevation angle, radiuses of the R for circular array antenna, αnThe azimuth for being array element in array antenna, λ is pre-
If signal wavelength.
3. in the anti-interference test of satellite navigation according to claim 1 composite signal generation method, it is characterised in that if
The array antenna that the array element is formed is square array, then the array antenna information and the letter of the step according to user input
Number propagation information calculates each simulation satellite signal and the phase change information of simulaed interference signal to be included, according to equation below meter
Calculate the phase change information of each simulation satellite signal and simulaed interference signal：
In formula, subscript m represents the parameter of m-th signal, and subscript n represents the parameter of n-th array element, θmFor signal incident orientation
Angle, φmFor the signal incidence elevation angle, circumradiuses of the R for square array antenna, rnFor n-th array element and the circumscribed circle center of circle away from
From αnThe azimuth for being n-th array element in array antenna, λ is default signal wavelength.
4. in the anti-interference test of satellite navigation according to claim 1 composite signal generation method, it is characterised in that if
The array antenna that the array element is formed is linear array, then the array antenna information and the letter of the step according to user input
Number propagation information calculates each simulation satellite signal and the phase change information of simulaed interference signal to be included, according to equation below meter
Calculate the phase change information of each simulation satellite signal and simulaed interference signal：
In formula, subscript m represents the parameter of m-th signal, and n represents the sequence number of n-th array element, θmFor signal incident orientation angle,
φmFor the signal incidence elevation angle, spacing of the d for the two neighboring array element of linear array, λ are default signal wavelength.
5. in the anti-interference test of satellite navigation according to claim 1 composite signal generation method, it is characterised in that also
Including：
According to the power information of user input, simulation satellite signal and simulaed interference signal are generated respectively；
The simulation satellite signal is carried out into power distribution, to generate N roads simulation satellite signal, N is battle array in the array antenna
The total quantity of unit；
The simulaed interference signal is carried out into power distribution, to generate N roads simulaed interference signal, N is battle array in the array antenna
The total quantity of unit.
6. in the anti-interference test of satellite navigation according to claim 1 composite signal generation method, it is characterised in that
Before source signal received by same array element is combined by step, also include：
Simulation satellite signal and simulaed interference signal after the phase shift is filtered and power adjustment, to filter out-of-band harmonics
And clutter, and power amplification is carried out to interference signal, generate the interference signal for meeting that default jamming-to-signal ratio is required.
7. in the anti-interference test of satellite navigation according to claim 1 composite signal generation method, it is characterised in that also
Including：
Using shielded box and transmitting antenna, the composite signal is injected to corresponding array element in the way of empty feedback.
8. in the anti-interference test of satellite navigation composite signal generating means, it is characterised in that include：
Signal generation module, for generating simulation satellite signal and simulation interference respectively according to the signal power information of user input
Signal；
Phase calculation module, calculates each for propagating information according to the array antenna information of user input and the signal
The phase change information of simulation satellite signal and simulaed interference signal；
Phase shift block, for entering to corresponding simulation satellite signal and simulaed interference signal according to the phase change information respectively
Row phase shift；
Combining module, for the simulation satellite signal and simulaed interference signal received by same array element is combined, generates
The composite signal of multiple array elements.
9. in the anti-interference test of satellite navigation according to claim 8 composite signal generating means, it is characterised in that if
The array antenna that the array element is formed is circular array, then phase calculation module is further used for calculating each according to equation below
The phase change information of simulation satellite signal and simulaed interference signal：
In formula, subscript m represents the parameter of m-th signal, and subscript n represents the parameter of n-th array element, θmFor signal incident orientation
Angle, φmFor the signal incidence elevation angle, radiuses of the R for circular array antenna, αnThe azimuth for being array element in array antenna, λ is pre-
If signal wavelength.
10. in the anti-interference test of satellite navigation according to claim 8 composite signal generating means, it is characterised in that
If the array antenna that the array element is formed is square array, phase calculation module is further used for calculating every according to equation below
The phase change information of individual simulation satellite signal and simulaed interference signal：
In formula, subscript m represents the parameter of m-th signal, and subscript n represents the parameter of n-th array element, θmFor signal incident orientation
Angle, φmFor the signal incidence elevation angle, circumradiuses of the R for square array antenna, rnFor n-th array element and the circumscribed circle center of circle away from
From αnThe azimuth for being n-th array element in array antenna, λ is default signal wavelength.
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| CN117518207A (en) * | 2024-01-05 | 2024-02-06 | 湖南卫导信息科技有限公司 | Outfield test system and method for multi-beam phased array antenna |
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