The invention discloses a
millimeter wave
sparse array remote monitoring imaging method and
system, and belongs to the technical field of
millimeter wave three-dimensional
holographic imaging. The method comprises the following steps: S1, obtaining an
echo signal; S2, performing interpolation operation; S3, performing
fast Fourier transform; S4, selecting a distance plane; S5, performing frequencydomain matched filtering; S6, performing fast Fourier inverse transform; S7, performing
time domain matched filtering; S8, performing coherent accumulation; and S9, obtaining a three-dimensional complex image. According to the
millimeter wave
sparse array remote monitoring imaging method and
system disclosed by the invention, a millimeter wave
sparse array full-electronic scanning imaging systemis adopted, and compared with a traditional optical
machine scanning far-field imaging
system, the millimeter wave sparse array full-electronic scanning imaging system has the characteristics of smallelectromagnetic wave
flicker effect, high
image signal-to-
noise ratio and large imaging field range; meanwhile, compared with a traditional
time domain type imaging method, the adopted
signal processing imaging method has the advantages of less hardware resources and less storage space, the
algorithm process is simple and easy to understand, the
algorithm main body only comprises the main body process of
fast Fourier transform, matched filtering and coherent accumulation, and the calculation efficiency is higher than that of the traditional
time domain type
algorithm.