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

A frequency-modulated continuous wave, software-defined technology, used in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation, etc. The effect of hardware cost, design cost reduction, and simple system equipment

Pending Publication Date: 2020-04-10
SHANGHAI UNIV
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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 scenario

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

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Embodiment Construction

[0057] The present invention will be described in detail below in conjunction with specific examples. The description of this example is only used to help understand the method and core idea of ​​the present invention, and is not intended to limit the present invention; within the spirit and principles of the present invention, any modifications and replacements made should be included in the protection of the present invention. scope.

[0058] Such as figure 1 As shown, a software-defined FM continuous wave radar system includes a software-defined signal source 101, a voltage-controlled oscillator 102, a power divider 103, a radio frequency transmitting amplifier 104, a transmitting antenna 105, a receiving antenna 106, and a radio frequency receiving amplifier 107, Mixer 108, baseband signal conditioner 109, software defined signal processor 110;

[0059] Wherein, the software-defined signal source 101 can generate a modulation signal c(t) of an arbitrary waveform through ...

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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...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S13/02
CPCG01S7/41G01S13/02Y02A90/10
Inventor 王涛李平
Owner SHANGHAI UNIV
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