Complex maneuvering group target imaging method based on matching search and Doppler ambiguity resolution

• Main Authors: HUANG DARONG, LIU FENGKAI, FENG CUNQIAN, GUO XINRONG
• Format: Patent
• Language: Chinese; English
• Published: 16.10.2020
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; CALCULATING; COMPUTING; COUNTING; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC DIGITAL DATA PROCESSING; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention provides a complex maneuvering group target imaging method based on matching search and Doppler ambiguity resolution. The complex maneuvering group target imaging method comprises the following steps of: performing translation compensation and Dechirp processing on echo pulse; 2, performing pulse compression on the echo, and estimating parameters like instantaneous frequency, frequency modulation rate and secondary frequency modulation rate of a maximum signal component in an i-th distance unit; 3, performing Doppler ambiguity resolution processing according to the principle of the maximum contrast by utilizing the estimated parameters; and 4, correcting distance curvature, realizing self-focusing, and acquiring a high-resolution unambiguous group target ISAR image by utilizing a reconstructed signal. According to the method, the problems of distance curvature, Doppler ambiguity and the like during complex maneuvering group target imaging can be effectively solved, and anew technical means is pr