Reference Signal Reconstruction for GPS-Based Passive Radar Based on Software Radio Platform

Because the GPS satellite moves relative to the earth, and the satellite transmits low power and is far from the ground, the reference signal received by the reference channel is impure and the signal to noise ratio is low, which becomes the key factor restricting the passive radar target detection based on GPS. A GPS satellite signal reconstruction system based on software radio platform is built, the capture of received GPS signals is completed and the reference signal reconstruction of GPS-based passive radar is realized. The field experiment results show that the system can realize the function of receiving, storing and reconstructing GPS signal, and effectively improve the purity of reference signal.