A frequency selection method for millimeter-wave linear frequency modulation ranging

Abstract

The invention discloses a frequency selection method for millimeter-wave chirp ranging, relates to the field of millimeter-wave applications, and also includes a millimeter-wave chirp frequency-selection system. The millimeter-wave chirp frequency-selection system includes a millimeter-wave chirp radar, a front Amplifiers, band-pass filters, main amplifiers, band-stop filters, detection integration circuits, branch amplifiers and comparators, use two-way processing, one band-pass, one band-stop, to highlight the signal of the selected frequency, and then use The comparison of the two signals makes the frequency selection more efficient, and the system is entirely composed of hardware, excluding any software, which avoids the risk of execution errors during the software operation, and the system is more secure, more concise, and more functional. The modules are visible, and it is more convenient to test and handle faults. The output signal of the invention is regular, and the safety is higher, and it is more convenient to test and handle faults.

Description

technical field [0001] The invention relates to the field of millimeter wave applications, in particular to a frequency selection method for millimeter wave linear frequency modulation ranging. Background technique [0002] With the advancement of technology, millimeter wave technology has also developed rapidly. Millimeter wave has the characteristics of infrared high precision and microwave all-weather. In recent years, with the breakthrough progress of millimeter wave solid-state devices and monolithic circuits in my country, its reliability has been greatly improved and its cost has been greatly reduced. Light weight, flexible and convenient to use. [0003] Millimeter-wave chirp is also being used in more and more applications, especially ranging and speed measurement. The basic principle is that the distance information and speed information can correspond to the difference frequency information, so the accurate frequency selection of the difference frequency is the e...

AI Technical Summary

Problems solved by technology

[0004] In the previous frequency selection method, the signal is sampled by a chip, and the software frequency selection is realized by using the FFT algorithm. Very inconvenient during investigation;

[0005] It is also possible to use filters to directly filter frequency selection, but the output signal of filter direct filter frequency selection is irregular, which is inconvenient for back-end signal processing

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