Software-defined frequency-modulated continuous wave radar system and transmitted signal modulation and echo signal processing method thereof

Abstract

The invention provides a software-defined frequency-modulated continuous wave radar system and a transmitted signal modulation and echo signal processing method thereof, and belongs to the field of radar systems and signal processing. The radar system comprises a software-defined signal source, a voltage-controlled oscillator, a power divider, a radio frequency transmitting amplifier, a transmitting antenna, a receiving antenna, a radio frequency receiving amplifier, a frequency mixer, a baseband signal conditioner and a software-defined signal processor. The transmitted signal modulation andecho signal processing method comprises the following steps: firstly, a radar system transmitting end transmitting a periodic intermittent modulation signal, and then, designing a corresponding detection algorithm at a receiving end, so that a useful echo waveform can be extracted, and the distance of a measured target can be calculated. The signal source and the signal processor are both definedby software and can be flexibly adjusted according to application scenes, and the radar ranging precision is improved, and no generation, no transmission and no synchronization signal receiving are needed, so that the hardware cost of the equipment is reduced.

Description

technical field [0001] The present invention relates to the technical field of radar system and signal processing, in particular to a software-defined frequency modulated continuous wave (Frequency Modulated Continuous Wave, FMCW) radar system and a transmission signal modulation and echo signal processing method thereof. Background technique [0002] Non-contact measurement is an important content in the field of scientific research and application. As non-contact measurement, wireless measurement and imaging are favored for their high efficiency and easy maintenance. Due to the influence of weather conditions such as rain, snow, smog, etc., when performing near-field detection, such as traffic flow detection and building measurement, the imaging analysis using ordinary optical cameras is often subject to greater restrictions. FMCW radar has the characteristics of strong diffraction ability, and can realize stable and high-precision measurement and imaging in harsh environm...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems that the existing FMCW radar is difficult to flexibly adjust design parameters and transmit modulation waveforms according to the actual requirements of diverse application scenarios, and needs to generate synchronization signals to increase costs, the purpose of the present invention is to provide a software-defined FMCW Radar System and Its Transmission Signal Modulation and Echo Signal Processing Method

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