CN113281791A - Array navigation signal simulator based on channel simulation - Google Patents
Array navigation signal simulator based on channel simulation Download PDFInfo
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- CN113281791A CN113281791A CN202110610576.XA CN202110610576A CN113281791A CN 113281791 A CN113281791 A CN 113281791A CN 202110610576 A CN202110610576 A CN 202110610576A CN 113281791 A CN113281791 A CN 113281791A
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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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- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention discloses an array navigation signal simulator based on channel simulation, and belongs to the technical field of satellite navigation test equipment. The simulator comprises a mathematical simulation unit, a navigation signal simulation unit, a splitter, a channel simulation unit, a combiner and a control unit; the navigation signal simulation unit generates multi-system multi-frequency-point navigation signals under the control of the digital simulation unit; the branching unit branches the navigation signals respectively and sends the navigation signals to the channel simulation unit; the combiner combines the navigation signals of a plurality of different frequency bands respectively to generate the required navigation signals under different channel simulation conditions. The invention realizes the simulation of navigation signals of a plurality of receiving channels and has the characteristic of simple structure.
Description
Technical Field
The invention relates to the technical field of satellite navigation test equipment, in particular to an array navigation signal simulator based on channel simulation.
Background
The array navigation signal simulator is used for simulating navigation signals received by different antenna arrays of an anti-interference antenna of the navigation terminal under the condition of a laboratory or used for batch detection of the navigation terminal. At present, for the simulation of array navigation signals, a plurality of navigation signal generating modules are generally adopted to form the simulation, the hardware and the software of the simulator are both complex, and especially the simulation of multi-system multi-frequency-point array signals is more complex.
Disclosure of Invention
In view of the above, the present invention provides an array navigation signal simulator based on channel simulation. The simulator realizes the simulation of navigation signals of a plurality of receiving channels and has the characteristic of simple structure.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an array navigation signal simulator based on channel simulation comprises a mathematical simulation unit, a navigation signal simulation unit, a splitter, a combiner, a channel simulation unit and a control unit;
the mathematical simulation unit is used for satellite navigation constellation simulation, atmosphere simulation, user trajectory simulation, generation of simulation control parameters such as time delay and power, and completion of parameter issuing.
The navigation signal simulation unit is used for generating multi-system multi-frequency-point navigation signals and respectively outputting the navigation signals to each frequency band;
the control unit is used for receiving the control parameters of the mathematical simulation unit and forwarding the control parameters to the channel simulation unit;
the channel simulation unit is used for receiving the time delay and power parameters, adjusting the time delay and power of each navigation signal and outputting the navigation signals;
the mathematical simulation unit sends a control signal to the navigation signal simulation unit to enable the navigation signal simulation unit to generate a multi-system multi-frequency-point navigation signal; the branching unit branches each frequency band of the navigation signal and sends the divided signals to the channel simulation unit; after receiving the control instruction of the mathematical simulation unit, the control unit respectively controls the time delay and the power of the channel simulation unit to complete the time delay and the power control and output of the corresponding channel navigation signal; the combiner combines the navigation signals of a plurality of different frequency bands respectively to generate the navigation signals under different channel simulation conditions.
The invention adopts the technical scheme to produce the beneficial effects that:
1) on the basis of the single-output satellite navigation signal simulator, the multipath array navigation signal simulation output is realized by adding the branching unit, the channel simulation unit, the combiner and other units, the simulation output device has the characteristic of simple structure, and the design cost is effectively reduced.
2) The array navigation signal simulator provided by the invention supports the output capability of multi-frequency point and multi-channel array satellite navigation signals, and each frequency point and each channel time delay and power parameter are independently adjustable, so that the array navigation signal simulator is suitable for application scenes such as anti-interference antenna test of a navigation terminal, batch detection of the navigation terminal and the like.
Drawings
Fig. 1 is a block diagram of the structure of an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
An array navigation signal simulator based on channel simulation comprises a mathematical simulation unit, a navigation signal simulation unit, a splitter, a combiner, a channel simulation unit and a control unit;
the mathematical simulation unit is used for satellite navigation constellation simulation, atmosphere simulation, user trajectory simulation, generation of simulation control parameters such as time delay and power, and completion of parameter issuing.
The navigation signal simulation unit is used for generating multi-system multi-frequency-point navigation signals and respectively outputting the navigation signals to each frequency band;
the control unit is used for receiving the control parameters of the mathematical simulation unit and forwarding the control parameters to the channel simulation unit;
the channel simulation unit is used for receiving the time delay and power parameters, adjusting the time delay and power of each navigation signal and outputting the navigation signals;
the mathematical simulation unit sends a control signal to the navigation signal simulation unit to enable the navigation signal simulation unit to generate a multi-system multi-frequency-point navigation signal; the branching unit branches each frequency band of the navigation signal and sends the divided signals to the channel simulation unit; after receiving the control instruction of the mathematical simulation unit, the control unit respectively controls the time delay and the power of the channel simulation unit to complete the time delay and the power control and output of the corresponding channel navigation signal; the combiner combines the navigation signals of a plurality of different frequency bands respectively to generate the navigation signals under different channel simulation conditions.
The following is a more specific example:
referring to fig. 1, the present embodiment includes: the device comprises a mathematical simulation unit, a navigation signal simulation unit, a splitter, a channel simulation unit, a combiner and a control unit;
the navigation signal simulation unit generates multi-system multi-frequency-point navigation signals under the control of the mathematical simulation unit; the branching unit branches the navigation signals respectively and sends the navigation signals to the channel simulation unit; the control unit controls the time delay and the power of the channel simulation unit respectively according to the control instruction of the mathematical simulation unit; the channel simulation unit completes time delay and power control on the corresponding channel navigation signal and outputs the signal under the control of the control unit; the combiner combines the navigation signals of a plurality of different frequency bands respectively to generate the required navigation signals under different channel simulation conditions.
The navigation signal simulation unit generates multi-system multi-frequency-point navigation signals under the control of the mathematical simulation unit and respectively outputs the navigation signals according to different frequency bands; taking the beidou system as an example, the navigation signal simulation unit generates three frequency point navigation signals of B1, B2 and B3, and each frequency point navigation signal is independently output.
The branching unit branches a plurality of frequency band navigation signals generated by the navigation signal simulation unit respectively and sends the signals to the channel simulation unit; assuming that an array navigation signal output by an N port is to be generated, N branches are simultaneously performed on three frequency point navigation signals B1, B2 and B3, and N frequency point navigation signals B1, N frequency point navigation signals B2 and N frequency point navigation signals B3 are formed after the branches are split.
The control unit respectively controls the time delay and the power of the channel simulation unit under the control of the mathematical simulation unit; the control process is mainly that the control unit receives the time delay and the power control parameter sent by the mathematical simulation unit and forwards the time delay and the power control parameter to the channel simulation unit.
The channel simulation unit completes time delay and power control on the corresponding channel navigation signal and outputs the signal under the control of the control unit; the channel simulation unit receives time delay and power control parameters, and simultaneously performs the same time delay and power adjustment on the ith (i is 1,2, …, N) B1 frequency point navigation signal, the ith (i is 1,2, …, N) B2 frequency point navigation signal and the ith (i is 1,2, …, N) B3 frequency point navigation signal, wherein the time delay adjustment can be realized by increasing a programmable delay line or digital buffer output and the like, and the power adjustment can be realized by increasing numerical control attenuation and the like.
The combiner combines the navigation signals of a plurality of different frequency bands respectively to generate the required navigation signals under different channel simulation conditions. The combiner combines the ith (i is 1,2, …, N) B1 frequency point navigation signal, the ith (i is 1,2, …, N) and the ith (i is 1,2, …, N) B3 frequency point to form the ith (i is 1,2, …, N) array navigation signal output.
Claims (1)
1. An array navigation signal simulator based on channel simulation is characterized by comprising a mathematical simulation unit, a navigation signal simulation unit, a splitter, a combiner, a channel simulation unit and a control unit;
the mathematical simulation unit is used for satellite navigation constellation simulation, atmosphere simulation and user trajectory simulation, generating simulation control parameters including time delay and power, and completing parameter issuing;
the navigation signal simulation unit is used for generating multi-system multi-frequency-point navigation signals and respectively outputting the navigation signals to each frequency band;
the control unit is used for receiving the control parameters of the mathematical simulation unit and forwarding the control parameters to the channel simulation unit;
the channel simulation unit is used for receiving the time delay and power parameters, adjusting the time delay and power of each navigation signal and outputting the navigation signals;
the mathematical simulation unit sends a control signal to the navigation signal simulation unit to enable the navigation signal simulation unit to generate a multi-system multi-frequency-point navigation signal; the branching unit branches each frequency band of the navigation signal and sends the divided signals to the channel simulation unit; after receiving the control instruction of the mathematical simulation unit, the control unit respectively controls the time delay and the power of the channel simulation unit to complete the time delay and the power control and output of the corresponding channel navigation signal; the combiner combines the navigation signals of a plurality of different frequency bands respectively to generate the navigation signals under different channel simulation conditions.
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Cited By (1)
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| CN114844576A (en) * | 2022-04-19 | 2022-08-02 | 深圳市玖合鑫通讯技术有限公司 | Simulation signal generation device, beam forming simulation system and simulation method |
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