Frequency selection method for millimeter wave linear frequency modulation ranging

Abstract

The invention discloses a frequency selection method for millimeter wave linear frequency modulation ranging, relating to the field of application of millimeter wave. The frequency selection method further comprises a millimeter wave linear frequency modulation frequency selection system, wherein the millimeter wave linear frequency modulation frequency selection system comprises a millimeter wavelinear frequency modulation radar, a preamplifier, a band-pass filter, a main path amplifier, a band suppressor filter, a detection integral circuit, a branch path amplifier, and a comparator. Two paths, band pass and band stop, are adopted for processing, making a signal of a selected frequency more prominent; then two paths of signals are compared, so that frequency selection is more efficient;further, the system internally comprises hardware alone and comprises no software, so that the risk of wrong execution of software in running is prevented, the system is safer and more concise, functional modules are visible, and tests and fault processing are more convenient. The frequency selection method guarantees more regular output signals and higher security, and makes tests and fault processing more convenient.

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

Images