2 results about "Phase error" patented technology

The invention discloses a terahertz active imaging radar system phase compensation method. The method comprises the following steps: S1) opening an internal calibration channel; S2) obtaining phase information of a terahertz wave echo signal of the internal calibration channel; S3) extracting phase error of the terahertz wave echo signal of the internal calibration channel; S4) through a polynomial fitting phase correction function, obtaining monomial and nonlinear term coefficient values of the phase correction function; S5) opening a reception channel; S6) obtaining an intermediate frequency echo signal of the reception channel; S7) analyzing the intermediate frequency echo signal of the reception channel to obtain target distance information; and S8) according to the target distance information and the phase correction function in the step S4), calculating compensation phase, and finishing phase compensation of intermediate frequency echo signal data of the reception channel according to the calculation result of the compensation phase. The advantages are that compared with a conventional phase compensation method, the method is high in adaptation, and can overcome the defects of a conventional terahertz active imaging radar phase compensation method.