Dimension reduction method of target reconstruction problem of continuous wave system 1-bite radar

Abstract

The invention discloses a dimension reduction method of the target reconstruction problem of continuous wave system 1-bite radar. The dimension reduction method the target reconstruction problem of the continuous wave system 1-bite radar comprises the following steps that, a single frame 1-bite data cube is subjected to three-dimensional fast Fourier transform (3D-FFT) through a receiving end, phase-coherent accumulation of target signals is completed in three domains of a slow time domain, a null domain and a fast time domain, and a three-dimensional frequency domain data cube is obtained; the three-dimensional frequency domain data cube is subjected to three-dimensional constant false-alarm pre-detection, target trace point information after being subjected to the pre-detection is obtained, and the target trace point information comprises serial numbers of slow time units, null domain units and fast time units where trace points located; and based on the serial numbers of the slow time units, the null domain units and the fast time units where the pre-detection trace points located, a dimension reduction measurement matrix is calculated, an original measurement matrix is replacedwith the dimension reduction measurement matrix, and a dimension reduction measurement model is obtained. According to the dimension reduction method the target reconstruction problem of the continuous wave system 1-bite radar, the dimensionality of a reconstruction model can be greatly reduced, and the problem that conventional nonlinear reconstruction algorithms cannot be solved due to too highdimensionality is solved.

Description

technical field [0001] The invention relates to the technical field of radar detection, in particular to a dimensionality reduction method for 1-bit radar target reconstruction in a continuous wave system. Background technique [0002] With the emergence of new application requirements such as millimeter-wave radar high-precision detection and air formation cooperative detection, factors such as insufficient device capabilities and limited data transmission bandwidth in complex electromagnetic environments have gradually become challenges for conventional radar systems. For example, the virtual control system based on millimeter-wave radar mounts radar on watches, audio and other equipment, uses radar technology to capture human gestures, and operates machines in the air. The detection accuracy is required to reach the submillimeter level. In this case, the required detection bandwidth can reach several GHz or even more than 10 GHz. At the same time, high requirements are pl...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a dimensionality reduction method for 1-bit radar target reconstruction in the continuous wave system, which can greatly reduce the dimensionality of the reconstruction model, and solve problems that cannot be solved by conventional nonlinear reconstruction algorithms due to excessive dimensionality. question

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