Distance-speed decoupling method based on triply periodic frequency modulation continuous wave coherent radar
A frequency-modulated continuous wave and coherent radar technology, which is applied in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve problems such as difficult correct pairing, difficult engineering implementation, and wrong pairing of spectrum area method , to achieve the effect of increasing redundancy, associating accuracy and improving reliability
Inactive Publication Date: 2014-11-19
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Among them, the spectral area method is difficult to correctly match targets with similar spectral characteristics; the MTD velocity method is also prone to pairing errors for targets with similar fuzzy velocities; the variable period matching method is ideal in theory, but it has the disadvantage of being difficult to realize in engineering
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[0038] under figure 1 and figure 2 The present invention will be further described in detail with specific embodiments.
[0039] A method for decoupling range and velocity of a moving target based on frequency modulation continuous wave coherent radar based on a three-period sawtooth wave, the specific implementation of which comprises the following steps:
[0040] Step 1. The radar successively transmits three frequency-modulated continuous wave signals of different periods successively, and the frequency-modulated continuous wave signals of each period are continuously transmitted L times, where L is the number of coherent accumulation periods; The beat signals between the FM continuous wave signal and the corresponding received echo signals are respectively subjected to analog-to-digital conversion to obtain digital beat signals in three cycles. The use of three frequency-modulated continuous wave signals with different periods here is mainly to use the MTD method to sol...
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The invention discloses a distance-speed decoupling method based on a triply periodic frequency modulation continuous wave coherent radar. The distance-speed decoupling method can be used on multi-target occasions, and is mainly characterized by including the steps that the real movement speed is obtained according to multi-target correlation and speed ambiguity resolution between distance-speed images obtained after MTD processing is performed within three periods, and then distance-speed decoupling is finished. Compared with an ordinary triangular wave linear frequency modulation continuous wave radar, both reliability and accuracy are improved.
Description
technical field [0001] The invention relates to a method for decoupling the distance and velocity of a moving target based on a three-period sawtooth wave with frequency modulation continuous wave coherent radar. Background technique [0002] Compared with pulse radar, linear frequency modulation continuous wave (LFMCW) radar is easier to achieve high range resolution. At the same time, it also has the advantages of no ranging blind zone, low transmission power, strong anti-intercept ability, and easy miniaturization and light weight of the equipment. These make the linear frequency modulation continuous wave radar gain wide attention in civilian and military applications. . [0003] However, LFM CW radar has a serious range-velocity coupling problem. It usually transmits a triangular wave waveform, and uses the characteristics of the coupling distance of the moving target on the real distance mirror under positive and negative slopes to complete the calculation of the real...
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IPC IPC(8): G01S13/34
CPCG01S13/584G01S7/35G01S13/343
Inventor 郑远温博
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP