Low earth orbit satellite internet-based communication and sensing integrated bistatic imaging method

• Main Authors: LIU RONGKE, LYU XIANGLONG, HOU RUOHAN, ZANG YUNSHUO
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2024
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; 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 low-orbit satellite internet-based communication and sensing integrated bistatic imaging method, which comprises the following steps of: 1, according to a given azimuth resolution and an observation area, determining the observation time and the sampling frequency of an azimuth, namely a slow time domain, and calculating a range resolution; 2, the user terminal receives and demodulates the satellite communication signal through a communication module, and reconstructs a transmitting signal through a demodulation result; step 3, estimating the time and phase deviation of the transmitting and receiving ends by performing cross-correlation on the received communication signal and the reconstructed transmitting signal; step 4, the user receives the echo of the observation area on the ground, and compensates the time and phase of the echo; step 5, carrying out fast time domain matched filtering on the compensated echoes; and step 6, carrying out slow time compression on the radar data obta