CN114624655A - Simultaneous multi-band ranging device and method - Google Patents

Simultaneous multi-band ranging device and method Download PDF

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Publication number
CN114624655A
CN114624655A CN202210183774.7A CN202210183774A CN114624655A CN 114624655 A CN114624655 A CN 114624655A CN 202210183774 A CN202210183774 A CN 202210183774A CN 114624655 A CN114624655 A CN 114624655A
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transmitting
signal
receiving
difference frequency
antenna
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张文馨
张卫杰
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/2813—Means providing a modification of the radiation pattern for cancelling noise, clutter or interfering signals, e.g. side lobe suppression, side lobe blanking, null-steering arrays

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

Abstract

The invention relates to a simultaneous multi-band range finding device and method, belonging to the fields of automobile range finding radar, radar altimeter and radio fuze. The microwave unit comprises a transmitting link and a receiving link, the transmitting link consists of a transmitting exciting circuit, a solid-state power amplifier, a transmitting coupling circuit and a transmitting antenna, the receiving link comprises a receiving antenna, a low-noise amplifier and a receiving difference frequency circuit, the receiving antenna adopts a broadband conformal antenna to receive a target echo signal, and the low-noise amplifier is connected with the receiving antenna and the receiving difference frequency circuit to amplify the target echo signal; the signal processing unit comprises an ADC module and a signal processing module, and is used for sampling the multipath difference frequency signals and calculating to obtain the relative distance between the ranging device and the target.

Description

Simultaneous multi-band ranging device and method
Technical Field
The invention relates to a simultaneous multi-band ranging device and method, and belongs to the field of automobile ranging radars, radar altimeters and radio fuses.
Background
Radio ranging is a technology for measuring a distance based on an electromagnetic wave. Radio ranging can be classified into three types according to its operation principle: pulse ranging, phase ranging, and frequency ranging. At present, the distance measuring devices used in various countries in the world mainly work in a single frequency band, and the multi-frequency range measuring technology in research usually adopts a plurality of receiving and transmitting channels and TR components, so that the size is large, the cost is high, and the system is complex.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a simultaneous multi-band distance measuring device and method.
The technical scheme of the invention is as follows:
a simultaneous multi-band range finding device comprises a microwave unit and a signal processing unit, wherein the microwave unit comprises a transmitting link and a receiving link, and the transmitting link comprises a transmitting exciting circuit, a solid-state power amplifier, a transmitting coupling circuit and a transmitting antenna; the receiving chain comprises a receiving antenna, a low noise amplifier and a receiving microwave circuit; the signal processing unit comprises an ADC module and a signal processing module;
the transmitting exciting circuit of the transmitting link is connected with the signal processing module of the solid-state power amplifier and the signal processing unit and generates radio-frequency signals under the control of the signal processing module; the solid-state power amplifier works in a saturated state, simultaneously outputs fundamental wave signals and harmonic wave signals, and radiates to the space through the transmitting antenna; the solid-state power amplifier is connected with the transmitting coupling circuit and couples the output signal of the solid-state power amplifier to the receiving microwave circuit; the transmitting antenna adopts a broadband conformal antenna, and a power signal output by the solid-state power amplifier is radiated to the space through the transmitting antenna;
the receiving antenna adopts a broadband conformal antenna to receive a target echo signal, and the low-noise amplifier is connected with the receiving antenna and a receiving microwave circuit to amplify the target echo signal; the receiving microwave circuit is connected with the low-noise amplifier, the transmitting coupling circuit and the signal processing unit, and is used for carrying out multi-channel filtering and mixing processing on a target echo signal amplified and output by the low-noise amplifier and a fundamental component and a harmonic component of a low-power transmitting signal coupled and output by the transmitting coupling circuit at the same time and outputting multi-channel difference frequency signals corresponding to the fundamental component and the harmonic component;
the power amplifier works in a saturated state, the transmitted radio signals comprise fundamental waves and harmonic waves, the microwave unit receives fundamental wave components and harmonic wave components of target echo waves at the same time, and the signal processing unit processes the echo signals of a plurality of frequency points to realize accurate distance measurement of the target;
the transmitting exciting circuit of the transmitting link is connected with the solid-state power amplifier and the signal processing module of the signal processing unit, and radio-frequency signals are generated and amplified and output by the solid-state power amplifier under the control of the signal processing module; the solid-state power amplifier works in a saturated state and simultaneously transmits fundamental wave signals and harmonic wave signals; the power signal output by the solid-state power amplifier is connected with the transmitting antenna, and the transmitting coupling circuit couples the output signal of the solid-state power amplifier to the receiving microwave circuit; the transmitting antenna adopts a broadband conformal antenna, the beam width covers a preset angle range, and a power signal output by the solid-state power amplifier radiates to the space through the transmitting antenna;
a receiving antenna of the receiving link adopts a broadband conformal antenna to receive a target echo signal, and the beam width covers the beam coverage angle range of a transmitting antenna; the low-noise amplifier is connected with the receiving antenna and the receiving microwave circuit and is used for amplifying the target echo signal; the input end of the low-noise amplifier is provided with an amplitude limiting circuit, so that the high-power burnout resistance of the low-noise amplifier is improved; the receiving microwave circuit is connected with the low-noise amplifier, the transmitting coupling circuit and the signal processing unit, and is used for performing multi-channel pre-filtering, frequency mixing and filtering processing on a target echo signal amplified and output by the low-noise amplifier and a fundamental wave signal and a harmonic signal of a low-power transmitting signal coupled and output by the transmitting coupling circuit and outputting multi-channel difference frequency signals;
the signal processing unit comprises an ADC module and a signal processing module; the ADC module synchronously samples difference frequency signals of the fundamental wave component and the harmonic wave component; and the signal processing module calculates to obtain a distance measurement result according to the sampling signals of the fundamental wave difference frequency and the harmonic wave difference frequency.
A simultaneous multiband ranging method, comprising the steps of:
step one, mounting a distance measuring device on a carrier, and starting power-on work;
secondly, a transmitting exciting circuit of the transmitting link generates a linear frequency modulation continuous wave signal with preset fundamental frequency under the control of a signal processing module, and the linear frequency modulation continuous wave signal is amplified and output through a solid-state power amplifier; the power signal output by the solid-state power amplifier is radiated outwards through the transmitting antenna, and meanwhile, the transmitting coupling circuit couples the output signal of the solid-state power amplifier to the receiving microwave circuit; the transmitting antenna adopts a broadband conformal antenna, and the beam width covers a preset angle range;
step three, a receiving antenna of a receiving link receives a target echo signal by adopting a broadband conformal antenna, and the beam width covers the beam coverage angle range of a transmitting antenna; the target echo signal is amplified by a low noise amplifier through a receiving antenna and then is sent to a receiving microwave circuit; an amplitude limiting circuit is configured at the input end of the low-noise amplifier and used for improving the high-power burnout resistance of the low-noise amplifier; the receiving microwave circuit is connected with the low-noise amplifier, the transmitting coupling circuit and the signal processing unit, and a multichannel receiving circuit design is adopted to perform pre-filtering, amplification, frequency mixing, filtering and signal conditioning on a target echo signal amplified and output by the low-noise amplifier and a fundamental wave signal and a harmonic wave signal of a low-power transmitting signal coupled and output by the transmitting coupling circuit, and output fundamental wave difference frequency and harmonic wave difference frequency signals;
step four, an ADC module of the signal processing unit synchronously samples fundamental wave difference frequency and harmonic wave difference frequency signals; the signal processing module respectively carries out FFT (fast Fourier transform), modulus calculation, signal detection, height calculation, height correction and height search tracking processing on the fundamental wave difference frequency and the harmonic wave difference frequency to finally obtain a distance measurement result based on the fundamental wave difference frequency and the harmonic wave difference frequency signals; the signal processing module controls a transmitting excitation circuit of the transmitting link and outputs a preset radio frequency signal;
step five, the signal processing module selects a fusion ranging mode according to a set scene; and when the distance measurement distance is larger than the set value, selecting fundamental wave difference frequency distance measurement, selecting a result of fusion processing of fundamental wave distance measurement and harmonic wave distance measurement, wherein the distance measurement distance is smaller than the set value.
In order to improve the anti-interference capability of the distance measuring device, fundamental wave and higher harmonic wave signals are radiated at the same time, and fundamental wave and higher harmonic wave echo signals are received and processed at the same time.
Advantageous effects
(1) The invention relates to a simultaneous multi-band range finding device and method, belonging to the fields of automobile range finding radar, radar altimeter and radio fuze. The microwave unit comprises a transmitting link and a receiving link, the transmitting link consists of a transmitting exciting circuit, a solid-state power amplifier, a transmitting coupling circuit and a transmitting antenna, the transmitting exciting circuit of the transmitting link is connected with the solid-state power amplifier and a signal processing module of the signal processing unit, a radio frequency signal is generated under the control of the signal processing module, the solid-state power amplifier works in a saturated state, and simultaneously outputs fundamental wave components and harmonic wave components which are radiated to the space through the transmitting antenna; the solid-state power amplifier is connected with the transmitting coupling circuit and couples the preset power part of the output signal of the solid-state power amplifier to the receiving difference frequency circuit; the transmitting antenna adopts a broadband conformal antenna, and radiates power signals output by the solid-state power amplifier to the space through the transmitting antenna. The receiving link comprises a receiving antenna, a low-noise amplifier and a receiving difference frequency circuit, wherein the receiving antenna adopts a broadband conformal antenna to receive a target echo signal, and the low-noise amplifier is connected with the receiving antenna and the receiving difference frequency circuit and amplifies the target echo signal; the receiving difference frequency circuit is connected with the low-noise amplifier, the transmitting coupling circuit and the signal processing unit, adopts the design of a multi-channel receiving circuit, amplifies a target echo signal output by the low-noise amplifier and fundamental wave components and harmonic wave components of a low-power transmitting signal output by the transmitting coupling circuit in a coupling mode, simultaneously carries out multi-channel filtering and frequency mixing processing, and outputs multi-channel difference frequency signals corresponding to the fundamental wave components and the harmonic wave components. The signal processing unit comprises an ADC module and a signal processing module, and is used for sampling the multipath difference frequency signals and calculating to obtain the relative distance between the ranging device and the target.
(2) The invention utilizes the solid-state power amplifier to work in a saturated state, simultaneously radiates fundamental waves and harmonic waves, realizes the simultaneous detection of a plurality of high-frequency and low-frequency points on a target by receiving and processing fundamental wave components and harmonic components in target echoes, utilizes multi-frequency-band signals to simultaneously detect and fuse information, improves the anti-interference capability of the distance measuring device, and has the characteristics of small volume, light weight, low power consumption, controllable cost, easy engineering realization and the like, and has good engineering application value. A simultaneous multi-band ranging technique is used for detecting and ranging a target by transmitting a radio signal and receiving an echo signal of the target. Because the power amplifier works in a saturated state, the transmitted radio signals comprise fundamental waves and harmonic waves, the microwave unit simultaneously receives fundamental wave components and harmonic wave components of target echo waves, and the signal processing unit processes the echo signals of a plurality of frequency points, so that the precision and the anti-interference capability of distance measurement are improved under the conditions of ensuring the cost, the volume and the like.
(3) In the present invention, the fundamental reason for the harmonic generation of the solid-state power amplifier is due to the nonlinear load. When the solid-state power amplifier works in a saturated state, when current flows through a load, the current is not in a linear relation with applied voltage, and non-sinusoidal current is formed, so that harmonic waves are generated. The harmonic frequencies are integral multiples of the fundamental frequency, and any repetitive waveform can be decomposed into sinusoidal components containing the fundamental frequency and a series of harmonics that are multiples of the fundamental, as demonstrated by fourier analysis principles.
ic＝Ico+Icm1 cosωt+Icm2 cos2ωt+Icm3 cos3ωt+……
According to the principle, when a transmitting signal of the simultaneous multi-band ranging technology passes through a solid-state power amplifier, fundamental waves and harmonic waves are output simultaneously.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic diagram of the apparatus of the present embodiment;
FIG. 3 is a schematic diagram of a transmitted signal of the present invention;
fig. 4 is a schematic diagram of signal processing according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art based on the embodiments of the present invention without inventive step, are within the scope of the present invention.
As shown in FIG. 1 and FIG. 2, a simultaneous multiband ranging apparatus includes a microwave unit, a signal processing unit. The microwave unit comprises a transmitting link and a receiving link, the transmitting link consists of a transmitting exciting circuit, a solid-state power amplifier, a transmitting coupling circuit and a transmitting antenna, the transmitting exciting circuit of the transmitting link is connected with the solid-state power amplifier and a signal processing module of the signal processing unit, radio frequency signals are generated under the control of the signal processing module, the solid-state power amplifier works in a saturated state, and simultaneously fundamental wave components and harmonic wave components are output and radiated to the space through the transmitting antenna; the solid-state power amplifier is connected with the transmitting coupling circuit and couples the preset power part of the output signal of the solid-state power amplifier to the receiving difference frequency circuit; the transmitting antenna adopts a broadband conformal antenna, and the power signal output by the solid-state power amplifier is radiated to the space through the transmitting antenna. The receiving link comprises a receiving antenna, a low-noise amplifier and a receiving difference frequency circuit, wherein the receiving antenna adopts a broadband conformal antenna to receive a target echo signal, and the low-noise amplifier is connected with the receiving antenna and the receiving difference frequency circuit and amplifies the target echo signal; the receiving difference frequency circuit is connected with the low-noise amplifier, the transmitting coupling circuit and the signal processing unit, adopts the design of a multi-channel receiving circuit, amplifies a target echo signal output by the low-noise amplifier and fundamental wave components and harmonic wave components of a low-power transmitting signal output by the transmitting coupling circuit in a coupling mode, simultaneously carries out multi-channel filtering and frequency mixing processing, and outputs multi-channel difference frequency signals corresponding to the fundamental wave components and the harmonic wave components. The signal processing unit comprises an ADC module and a signal processing module, and is used for sampling the multipath difference frequency signals and calculating to obtain the distance relative to the target.
In practical operation, a simultaneous multiband distance measurement method can be implemented as follows.
Firstly, the distance measuring device is arranged on a carrier, and the power-on work is started.
And secondly, the transmitting excitation circuit of the transmitting link of the simultaneous multi-band ranging technology generates a linear frequency modulation continuous wave signal of an S band under the control of a signal processing module, the signal form is shown in figure 3, the signal is amplified and output through a solid-state power amplifier, and as the solid-state power amplifier works in a saturated state, fundamental wave components and second harmonic wave components of a C band are generated at the same time. The power signal output by the solid-state power amplifier is radiated outwards through the transmitting antenna, and meanwhile, 0.1% of the power of the output signal of the solid-state power amplifier is coupled to the receiving difference frequency circuit through the transmitting coupling circuit. Because the transmitting antenna adopts a small-caliber broadband conformal antenna, the beam width can cover the angle range of +/-60 degrees.
And thirdly, receiving the target echo signal by adopting a broadband conformal antenna, wherein the beam width covers the irradiation angle range of the transmitting antenna. And a target echo signal of the irradiation area is amplified by a low-noise amplifier through a receiving antenna and then is sent to a receiving difference frequency circuit. The input end of the low-noise amplifier is provided with the amplitude limiting circuit, so that the high-power burnout resistance of the low-noise amplifier is improved. The receiving difference frequency circuit is connected with the low-noise amplifier, the transmitting coupling circuit and the signal processing unit, and a multichannel receiving circuit design is adopted to amplify a target echo signal output by the low-noise amplifier and a fundamental component and a second harmonic component of a low-power transmitting signal output by the transmitting coupling circuit, and simultaneously carry out multichannel pre-filtering, amplification, frequency mixing, filtering and signal conditioning, and output fundamental difference frequency and second harmonic difference frequency signals.
And fourthly, the signal processing unit of the simultaneous multi-band ranging technology comprises an ADC module and a signal processing module. The ADC module synchronously samples fundamental wave difference frequency signals and second harmonic difference frequency signals, the signal processing module respectively carries out FFT (fast Fourier transform), modulus calculation, signal detection, height calculation, height correction, height search and tracking and other processing on the fundamental wave difference frequency signals and the second harmonic difference frequency signals, the processing flow is shown in figure 4, and finally the ranging result based on the fundamental wave difference frequency signals and the second harmonic difference frequency signals is obtained.
And fifthly, selecting a correct fusion ranging mode by a signal processing module of the simultaneous multi-band ranging technology according to a use scene. For the vehicle-mounted range radar system, the two can be selected to be fused for ranging; for the altimeter, when the height is very high, the fundamental wave difference frequency distance measurement can be selected, and when the distance is closer to the ground, the two can be selected to be fused for height measurement. The specific fusion ranging result is obtained through mean value calculation.
Through the verification of the specific example, the simultaneous multi-band ranging technology provided by the invention can simultaneously radiate S-band (fundamental wave) and C-band (second harmonic) signals, and the 2 signals are simultaneously received and processed, so that the anti-interference capability of the ranging device is greatly improved. The method is simple to implement, low in cost, low in power consumption and good in real-time performance and engineering application value.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (8)

1. A simultaneous multiband distance measuring apparatus, characterized in that: the device comprises a microwave unit and a signal processing unit, wherein the microwave unit comprises a transmitting link and a receiving link, and the transmitting link comprises a transmitting exciting circuit, a solid-state power amplifier, a transmitting coupling circuit and a transmitting antenna; the receiving chain circuit comprises a receiving antenna, a low noise amplifier and a receiving microwave circuit; the signal processing unit comprises an ADC module and a signal processing module;
the transmitting exciting circuit is connected with a solid-state power amplifier to generate a radio-frequency signal; the solid-state power amplifier works in a saturated state, simultaneously outputs fundamental wave signals and harmonic wave signals, and radiates to the space through the transmitting antenna; the solid-state power amplifier is connected with the transmitting coupling circuit and couples the output signal of the solid-state power amplifier to the receiving microwave circuit;
the receiving antenna is used for receiving a target echo signal, and the low-noise amplifier is connected with the receiving antenna and the receiving microwave circuit and is used for amplifying the target echo signal; the receiving microwave circuit is connected with the low-noise amplifier, the transmitting coupling circuit and the signal processing unit, and is used for carrying out multi-channel filtering and mixing processing on a target echo signal amplified and output by the low-noise amplifier and a fundamental component and a harmonic component of a low-power transmitting signal coupled and output by the transmitting coupling circuit at the same time and outputting multi-channel difference frequency signals corresponding to the fundamental component and the harmonic component;
the ADC module synchronously samples difference frequency signals of a fundamental component and a harmonic component; and the signal processing module obtains a distance measurement result according to the sampling signals of the fundamental wave difference frequency and the harmonic wave difference frequency.
2. The simultaneous multiband distance measuring apparatus according to claim 1, wherein:
the transmitting antenna adopts a broadband conformal antenna, the beam width covers a preset angle range, and a power signal output by the solid-state power amplifier is radiated to the space through the transmitting antenna.
3. The simultaneous multiband distance measuring apparatus according to claim 1, wherein:
the receiving antenna adopts a broadband conformal antenna to receive a target echo signal, and the beam width covers the beam coverage angle range of the transmitting antenna.
4. The simultaneous multiband distance measuring apparatus according to claim 1, wherein:
the solid-state power amplifier works in a saturated state, the transmitted radio signals comprise fundamental waves and harmonic waves, the microwave unit receives fundamental wave components and harmonic wave components of target echo waves at the same time, and the signal processing unit processes the echo signals of the multiple frequency points to realize accurate distance measurement of the target.
5. A simultaneous multiband ranging method is characterized by comprising the following steps:
step one, installing the device of any one of claims 1 to 4 on a carrier, and starting power-on work;
generating a linear frequency modulation continuous wave signal with a preset fundamental frequency by a transmitting exciting circuit of a transmitting link under the control of a signal processing module, amplifying and outputting the linear frequency modulation continuous wave signal through a solid-state power amplifier, and generating a power signal containing a fundamental wave signal and a higher harmonic component when the solid-state power amplifier works in a saturated state; the power signal output by the solid-state power amplifier is radiated outwards through the transmitting antenna, and meanwhile, the transmitting coupling circuit couples the output signal of the solid-state power amplifier to the receiving microwave circuit;
thirdly, the target echo signal is amplified by a low noise amplifier through a receiving antenna and then is sent to a receiving microwave circuit; the input end of the low-noise amplifier is provided with an amplitude limiting circuit, a receiving microwave circuit is connected with the low-noise amplifier, a transmitting coupling circuit and a signal processing unit, and pre-filtering, amplifying, mixing, filtering and signal conditioning are simultaneously carried out on a target echo signal amplified and output by the low-noise amplifier and a fundamental wave signal and a harmonic wave signal of a low-power transmitting signal coupled and output by the transmitting coupling circuit, so that fundamental wave difference frequency signals and harmonic wave difference frequency signals are output;
step four, an ADC module of the signal processing unit synchronously samples fundamental wave difference frequency and harmonic wave difference frequency signals; the signal processing module calculates a distance measurement result based on the fundamental difference frequency and the harmonic difference frequency according to the fundamental difference frequency and the harmonic difference frequency;
step five, the signal processing module selects a fusion ranging mode according to a set scene; and when the distance measurement distance is larger than the set value, selecting fundamental wave difference frequency distance measurement, selecting a result of fusion processing of fundamental wave distance measurement and harmonic wave distance measurement, wherein the distance measurement distance is smaller than the set value.
6. The simultaneous multiband ranging method of claim 5, wherein:
in the second step, the transmitting antenna adopts a broadband conformal antenna, and the beam width covers a preset angle range.
7. The simultaneous multiband ranging method of claim 5, wherein:
in the third step, the receiving antenna of the receiving link receives the target echo signal by adopting a broadband conformal antenna, and the beam width covers the beam coverage angle range of the transmitting antenna.
8. The simultaneous multiband ranging method of claim 5, wherein:
in the fourth step, the signal processing module respectively performs FFT, modulus calculation, signal detection, altitude calculation, altitude correction and altitude search tracking processing on the fundamental difference frequency and the harmonic difference frequency to obtain a ranging result based on the fundamental difference frequency and the harmonic difference frequency signal.
CN202210183774.7A 2022-02-28 2022-02-28 Simultaneous multi-band ranging device and method Pending CN114624655A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210183774.7A CN114624655A (en) 2022-02-28 2022-02-28 Simultaneous multi-band ranging device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210183774.7A CN114624655A (en) 2022-02-28 2022-02-28 Simultaneous multi-band ranging device and method

Publications (1)

Publication Number Publication Date
CN114624655A true CN114624655A (en) 2022-06-14

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