Ultra-Wideband Direct Chaotic Velocity and Ranging Radar Device Based on Heterodyne Correlation Method

Abstract

The invention discloses an ultra-wideband direct chaotic speed-measuring and ranging radar device based on a heterodyne correlation method. The ultra-wideband direct chaotic speed-measuring and ranging radar device is characterized in that a chaotic signal generated by a ultra-wideband chaotic generator is directly taken as a radar signal and is divided into three ways of in-phase components by a wideband power splitter, wherein the first way is taken as a detection signal and is transmitted by a broadband ridged horn antenna; the second way is mixed with an intrinsic signal generated by a signal generator and is taken as a reference signal I; the third way is taken as a reference signal II, is directly inputted to a data acquisition and processing unit and is subjected to cross-correlation processing with echo signals. A target scattering signal and a clutter signal are taken as the echo signals to be received by the broadband ridged horn antenna, each of echo signals is divided into two ways of in-phase components; the first way is directly inputted into the data acquisition and processing unit to be subjected to data acquisition and related processing; the second way is subjected to heterodyne processing with the reference signal I and is inputted to an I / Q frequency mixer firstly and then the data acquisition and processing unit to be acquired; the speed information of a target is extracted from an output signal.

Description

technical field [0001] The invention relates to the technical field of radar detection devices, in particular to an ultra-wideband direct chaotic speed-measuring and ranging radar device based on a heterodyne correlation method, which can be applied to remote sensing, investigation and other fields. Background technique [0002] With the rapid development of information technology, radar has become an indispensable tool for modern communication and military support. In the multiple complex interference environment, various applications also put forward higher requirements for radar, namely: high precision, strong anti-interference ability, multi-target tracking, small multi-path interference, good adaptive performance, etc., so it is derived Ultra Wideband Radar. Ultra-wideband radar refers to a radar with an operating bandwidth greater than or equal to 25% of its center frequency. Compared with narrowband radar, UWB radar has the advantages of high transmission rate; good...

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Problems solved by technology

Using hardware to achieve direct chaotic radar target ranging has not been reported in the literature

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